CN103906490A - Method for producing stretchable sheet - Google Patents

Abstract

A method for producing a stretchable sheet comprises a step of applying adhesives (9', 10') to one or both of a pair of belt-shaped sheets (50, 60), and an integration step of joining the belt-shaped sheets (50, 60) with a thread-shaped elastic body (7) conveyed by a conveyance means (16), and integrally pressurizing the belt-shaped sheets with the thread-shaped elastic body (7) interposed therebetween to obtain a stretchable sheet (30A), and the condition for joining in the integration step between the pair of belt-shaped sheets (50, 60) is made different between the adhesive (9') for forming a central joint and the adhesive (10') for forming an end joint. For example, the pair of belt-shaped sheets (50, 60) is introduced between a pair of rolls (181, 182) and pressurized, and a roll having different pressures to be applied to the pair of belt-shaped sheets (50, 60) in a portion for pressurizing the adhesive (10') for forming the central joint and a portion for pressurizing the adhesive (9') for forming the end joint is used for the pair of rolls.

Description

The manufacture method of Stretchable sheet

Technical field

The present invention relates to the manufacture method of Stretchable sheet.

Background technology

All the time, the disposable diaper of the fin type of known so-called deploying type, it comprises: have face sheet, back-sheet and be configured in the absorbent main body of the lengthwise in fact of the absorber between these two sheet materials; The a pair of waist panel arranging with the edge, both sides of the principal length direction along this absorbent main body, by in a pair of this waist panel set portion along the fixing pull stap in the edge, outside of principal length direction separately, be bonded to this absorbent main body non-skin opposite face by set region, and be worn on it wearer.As this waist panel, from the viewpoint of wearing property etc., use and there is the sheet component (Stretchable sheet) of retractility.

For example, in patent documentation 1, as the disposable diaper that uses the fin type of the deploying type of Stretchable sheet in waist panel, record the belt disposable diaper as waist panel (set band) by the Stretchable sheet that is adhesively fixed many linear elastic bodies with elongation state and form between two sheet materials.In the set band of recording at patent documentation 1, the bonding portion of the continuous vertical stripe shape to lower end of the upper end from set band that two sheet materials are formed by the interval of opening regulation in width (with the orthogonal direction of aforementioned body length direction) overhead is bonding.

In addition, in patent documentation 1, as the manufacture method of the waist panel (set band) of patent documentation 1, record following content: in the longitudinal direction to after the sheet material vertical stripe shape ground adhesive-applying in carrying, this sheet material helically volume is hung on to a pair of conveyer belt, thus with after the linear elastic bodies of the throughput direction of this sheet material elongation state that roughly orthogonal direction is stretched is converged and is engaged, and other sheet material converges in the mode that clips above-mentioned linear elastic bodies between this other sheet material and above-mentioned sheet material, they are integrated via pressurization integratedly between pair of rolls.

Prior art document

Patent documentation

Patent documentation 1: TOHKEMY 2010-22558 communique

But, in the time that two sheet materials that clip linear elastic bodies are pressurizeed between pair of rolls, when coated be the bonding agent of vertical stripe shape during by strong pressurizing, the bonding agent of faciola shape coating is by conquassation, on the width of sheet material, expand, the aeration of Stretchable sheet and flexibility decline thus.On the other hand, while considering that aeration and flexibility are pressurizeed with low-pressure, this linear elastic bodies is easily from departing from the elastomeric bonding portion of elongation state lower fixed line shape.

In addition, in the Stretchable sheet (set band) of recording at patent documentation 1, while manufacture due to it, be breaking on conveyer belt the end (cut-out end) of this linear elastic bodies that the both ends of the linear elastic bodies of hanging with elongation state volume generate, due to the contraction after the cut-out of this linear elastic bodies, sometimes respectively dispersedly towards irregular direction, due to these irregular cut-out ends, cause the degraded appearance of Stretchable sheet.

Like this, as the method for irregular ordered state of end (cut-out end) of eliminating linear elastic bodies, consider following method: in the sheet material of Stretchable sheet, cut off existing position, the end end of the throughput direction of sheet material (when Stretchable sheet is manufactured along) forming, (before the cut-out operation of linear elastic bodies) adhesive-applying in advance before forming cut-out end, utilize this bonding agent, suppress the movement of the cut-out end producing along with the contraction of the linear elastic bodies after firm cut-out.But, in order to be obtained the effect (correction of the irregular alignment of the cut-out end of linear elastic bodies) of regulation by the method, must suitably control the constant intensity that cuts off the relative sheet material in end.

Summary of the invention

The present invention relates to a kind of manufacture method of Stretchable sheet of continuous manufacture Stretchable sheet, in this Stretchable sheet, be adhesively fixed at the state between a pair of banded sheet material, linear elastic bodies being extended on the direction intersecting with the throughput direction of this band shape sheet material, width central part at Stretchable sheet has central junction surface, and has pair of end portions junction surface in the both sides of this width central part.

The manufacture method of Stretchable sheet of the present invention comprises following operation: carry operation, use elastomer winding mechanism above-mentioned linear elastic bodies to be wound in to the conveying mechanism of this linear elastic bodies to become the mode of the state extending in the direction of intersecting with above-mentioned throughput direction, utilize this conveying mechanism that this linear elastic bodies of coiling is carried on above-mentioned throughput direction; In the adhesive applicating operation of one or both adhesive-applying of a pair of above-mentioned banded sheet material; With integrated operation, a pair of above-mentioned banded sheet material after above-mentioned adhesive applicating operation and the above-mentioned linear elastic bodies of being carried by above-mentioned conveying mechanism are converged, to clip this linear elastic bodies a pair of this band shape sheet integral pressurize, obtain above-mentioned Stretchable sheet.

And, in the manufacture method of Stretchable sheet of the present invention, make the use of the bonding agent engaging condition in above-mentioned integrated operation between a pair of above-mentioned banded sheet material forms to(for) above-mentioned central junction surface different with the bonding agent that above-mentioned engaged at end portion forms use.

In the preferred embodiment of the present invention, in above-mentioned integrated operation, a pair of above-mentioned banded sheet material is imported between pair of rolls and pressurizeed, and, as a pair of this roller, employing be configured to above-mentioned central junction surface is formed use bonding agent pressurization part and above-mentioned engaged at end portion is formed to the part of the bonding agent pressurization of use, to the different roller of a pair of above-mentioned banded sheet material applied pressure.

In addition, in another preferred implementation of the present invention, in above-mentioned integrated operation, a pair of above-mentioned banded sheet material is imported between pair of rolls and pressurizeed, and, the time to this bonding agent pressurization from one or both above-mentioned central junction surface of coating of a pair of banded sheet material being formed to the bonding agent of use until between pair of rolls, and form from applying above-mentioned engaged at end portion the bonding agent of use until the asynchronism(-nization) to this bonding agent pressurization between pair of rolls.

In addition, in another preferred implementation of the present invention, after above-mentioned adhesive applicating operation, carry out the cooling or heating of the bonding agent that the bonding agent used at above-mentioned central junction surface or above-mentioned engaged at end portion use, in above-mentioned integrated operation, the state of above-mentioned two bonding agents in the different state of temperature to exist between a pair of above-mentioned banded sheet material by cooling or heating, between pair of rolls to a pair of this band shape sheet material pressurization.

Stretchable sheet in the present invention is preferably adhesively fixed at the state between a pair of banded sheet material, linear elastic bodies being extended on the direction intersecting with the throughput direction of this band shape sheet material, width central part at this Stretchable sheet has central junction surface, and has pair of end portions junction surface in the both sides of this width central part.

In addition, the invention provides a kind of disposable diaper, it comprises: have the veutro portion at the veutro of wearer while wearing, absorbent main body in the drosal part of dorsal part and the crotch between veutro portion and drosal part; The waist panel that is connected the pair of right and left arranging with left and right two foreign sides at drosal part, above-mentioned waist panel is used the Stretchable sheet being obtained by the manufacture method of above-mentioned Stretchable sheet.

Brief description of the drawings

Fig. 1 represents the waist panel that obtained by an embodiment of the invention and the plane graph of flat type disposable diaper.

Fig. 2 is the axonometric chart that represents the Sketch of the manufacturing installation of the Stretchable sheet of the enforcement of the manufacture method that is suitable for an embodiment of the invention (the first embodiment).

Fig. 3 is the axonometric chart of the structure of the upstream side of the turning arm (elastomer winding mechanism) of the device shown in presentation graphs 2.

Fig. 4 (a) is the top view of a part for the device shown in Fig. 2, and Fig. 4 (b) is the plane graph that represents an example of the Stretchable sheet of being manufactured by this device.

Fig. 5 is the figure that represents the integrated mechanism of the enforcement of the manufacture method that is suitable for another embodiment of the present invention (the second embodiment).

Fig. 6 (a) and (b) be the figure that represents the Sketch of the manufacturing installation of the Stretchable sheet of the enforcement of the manufacture method that is suitable for another embodiment of the present invention (the 3rd embodiment).

Fig. 7 is the figure that represents the Sketch of the manufacturing installation of the Stretchable sheet of the enforcement of the manufacture method that is suitable for another embodiment of the present invention (the 4th embodiment).

Detailed description of the invention

The invention provides the bond strength forming between sheet material, the constant intensity different position mutually of the relative sheet material of linear elastic bodies, can effectively improve the manufacture method of the Stretchable sheet attractive in appearance etc. of anti-detachment property, flexibility, the outward appearance of linear elastic bodies.

Below, for the manufacture method of Stretchable sheet of the present invention, describe with reference to accompanying drawing based on its preferred implementation.

As shown in Figure 1, the Stretchable sheet that the first embodiment is manufactured is for example for the waist panel 3 of the disposable diaper 1 of deploying type.Thus, first, the disposable diaper 1 for the deploying type of waist panel 3 by the Stretchable sheet of being manufactured by the first embodiment is described.

As shown in Figure 1, diaper 1 comprises: have in the time the dressing A of veutro portion at the veutro of wearer, absorbent main body 2 at the drosal part B of dorsal part and the crotch C between the A of veutro portion and drosal part B; In the left and right of drosal part B, two foreign sides connect the pair of right and left waist panel 3,3 arranging.As shown in Figure 1, diaper 1 has the tab member 4,4 that connects the pair of right and left arranging in the left and right of the A of veutro portion two foreign sides.By diaper 1 as shown in Figure 1 under the plane state spreading apart, absorbent main body 2 is rectangle, tab member 4 is that long limit (going to the bottom) side of trapezoidal, trapezoidal tab member 4 is fixed on absorbent main body 2 by the known engagement means of bonding agent, the thermal weldings etc. such as hot-melt adhesive.In addition, in figure, the direction shown in symbol X is the width of diaper 1 (absorbent main body 2), and the direction shown in symbol Y is the length direction of diaper 1 (absorbent main body), and two direction X, Y are mutually orthogonal.

As shown in Figure 1, absorbent main body 2 has: the face sheet 21 of liquid permeability; The back-sheet 22 of liquid impermeability or hydrophobicity; And be configured in the absorber 23 of the liquid retainability between these two sheet materials 21,22.Face sheet 21 forms the skin opposite face of diaper 1 (absorbent main body 2), and back-sheet 22 forms the non-skin opposite face of diaper 1 (absorbent main body 2).Face sheet 21 and back-sheet 22 have respectively than the overall dimensions of absorber 23 large overlook the shape for rectangle, extend out to foreign side from the circumference of absorber 23, they extension directly or via other parts be bonded with each other.In addition, skin opposite face be disposable diaper or other component parts in the time dressing towards the face of the skin side of wearer, non-skin opposite face be disposable diaper or other component parts in the time dressing towards the face of the opposition side of the skin side of wearer.

As shown in Figure 1, in the left and right sides portion of the length direction Y along absorbent main body 2, a pair of stereo enclosure forms the roughly configuration endlong that spreads all over the length direction Y of absorbent main body 2 with sheet material 24,24.Each stereo enclosure forms with in sheet material 24, its alongst a side edge part of Y (edge, outside) be fixed on absorbent main body 2 (face sheet 21), opposite side edge (edge, inner side) is not fixed on absorbent main body 2 and is become free edge, and the elastomeric element 25 of an above wire is fixed on this opposite side edge with the state extending on length direction Y.Utilize this structure, a pair of stereo enclosure forms with sheet material 24,24, and in the time of the wearing of diaper 1, the above-mentioned opposite side edge in crotch C is left from face sheet 21 due to the contractility of elastomeric element 25, forms thus a pair of stereo enclosure.In addition, position (shank) around the thigh that is configured in wearer of the left and right sides portion of the alongst Y of absorbent main body 2, dispose the elastomeric element 26 of the wire that is used to form leg creases with elongation state, in the time of the wearing of diaper 1, because the contraction of elastomeric element 26 forms a pair of leg creases, around the thigh of fitting well.

As shown in Figure 1, a pair of waist panel 3,3 is respectively the Stretchable sheet that is adhesively fixed with many linear elastic bodies 7 between two sheet materials 5,6 with elongation state, is rectangular shape under the state of plane expansion as shown in Figure 1.Many linear elastic bodies 7 in each waist panel 3 separate predetermined distance and configure on length direction Y, and are fixed between sheet material 5,6 with the state extending on width X respectively.

Waist panel 3 has: the sidepiece 3A of foreign side that is fixed with pull stap 8 by the known engagement means such as hot-melt adhesive, welding; On width X, be positioned at the square sidepiece 3C of the opposition side of the sidepiece 3A of foreign side, between these both sides 3A, 3C, there is the pars contractilis 3B on width X with retractility.Waist panel 3 therein square sidepiece 3C is fixed on absorbent main body 2 (specifically, for example, between stereo enclosure forms by sheet material 24 and back-sheet 22) by the known engagement means such as hot-melt adhesive, welding.

As shown in Figure 1, waist panel 3 has multiple central junction surfaces 10 at the central part of width (directions X), and has pair of end portions junction surface 9,9 in the both sides of this width central part.Engaged at end portion 9 is formed as having the band shape of Rack on each of the sidepiece 3A of foreign side of waist panel 3 and Nei Fang sidepiece 3C, central junction surface 10 pars contractilis 3B cathetus shape be formed with multiple.

Engaged at end portion 9 and central junction surface 10 be respectively by bonding agent preferably by hot-melt adhesive by between sheet material 5,6 engage part, in the waist panel 3 of manufacturing in present embodiment, as shown in Figure 1, in the total length of the length direction Y of sheet material 5,6 (waist panel 3) continuously.

In addition, many linear elastic bodies 7 are configured to the engaged at end portion 9 of interior side's sidepiece 3C from the engaged at end portion 9 of the sidepiece 3A of foreign side, have and part that each central junction surface at pair of end portions junction surface 9,9 and the multiple central junction surface 10 between them is overlapping.And, linear elastic bodies 7 and the overlapping part of engaged at end portion 9 and central junction surface 10 utilize bonding agent to be fixed with the state being sandwiched between two sheet materials 5,6.In other words, the part overlapping with linear elastic bodies 7 in each of engaged at end portion 9 and central junction surface 10, each linear elastic bodies 7 is fixed on sheet material 5,6 each other by bonding agent, not overlapping with linear elastic bodies 7 part in each of engaged at end portion 9 and central junction surface 10, directly engages sheet material 5,6 each other by bonding agent.In engaged at end portion 9 and central junction surface 10, linear elastic bodies 7 with clip it a side of two sheet materials 5,6 or two sides between preferably engaged by bonding agent.

In addition, in the waist panel 3 of being manufactured by the first embodiment, as shown in Figure 1, the width W 1 of engaged at end portion 9 is greater than the width W 2 at central junction surface 10, and engaged at end portion 9 is than more wide cut of central junction surface 10.In addition, in Fig. 1, in order easily to describe, engaged at end portion 9 and central junction surface 10 represent in the mode that can see clearly from outside, but are in fact not limited to this situation.

Engaged at end portion 9 in waist panel 3 and central junction surface 10 separate predetermined distance and form on width X, between adjacent engaged at end portion 9 and central junction surface 10 and adjacent central junction surface 10 each other, become between sheet material 5,6 the not non-bonding region of placement of adhesives.In these non-bonding regions, linear elastic bodies 7 is with respect to sheet material the 5, the 6th, non-stationary state.

In the waist panel 3 of plane expansion, linear elastic bodies 7 is elongation state in pars contractilis 3B, and the interior side (the width inner side of diaper) of the engaged at end portion 9 in foreign side's (direction that pull stap 8 is outstanding) and interior side's sidepiece 3C of the engaged at end portion 9 in the sidepiece 3A of foreign side is relaxed state (non-elongation state).In addition near the end of its length direction of linear elastic bodies 7 or its, in engaged at end portion 9, be fixed with elongation state.

As sheet material 5, the bonding agent using in 6 joints (or the formation at engaged at end portion and central junction surface) each other, as long as in this Stretchable sheet (waist panel) for engage between by each parts used bonding agent just can without any restriction use, for example can enumerate noncrystalline polyolefin, ethylene-vinyl acetate copolymer (EVA), vinyl-acrylate copolymer (EEA), styrene butadiene styrene block copolymer (SBS) (SBS), styrene isoprene styrene block copolymer (SIS) (SIS), styrene-ethylene/butylene-styrene block copolymer (SEBS), the thermoplasticity polymer such as styrene-ethylene/propylene-styrene block copolymer (SEPS) and their mixture etc.Above-mentioned bonding agent is preferably heat molten type (hot-melt adhesive).

The formation material of the each several part of diaper 1 is described.

As face sheet 21 and back-sheet 22, can use in this technical field all the time at the various materials that use etc.As face sheet 21, can use the sheet material of the various liquid permeabilitys such as non-woven fabrics, apertured film.As back-sheet 22, can use do not have poisture-penetrability resin molding, there is minute aperture and there is the material of the various liquid impermeabilities such as the non-woven fabrics such as resin molding, hydrophobic non-woven fabrics of poisture-penetrability, the laminated body of they and other sheet material or hydrophobicity.As absorber 23, the absorbent core that can use the fiber assemblies such as paper pulp fiber or non-woven fabrics or keep the granule of water absorbent polymer to form in them, can use by the material that comprises that coated this absorbent core of the thin paper of water penetration or the cored sheet material of non-woven fabrics forms.Form with sheet material 24 as the stereo enclosure that forms stereo enclosure, can use film, non-woven fabrics, fabric or their laminated sheet etc. of retractility.In addition can use as tab member 4, can be as the material (aftermentioned) of the sheet material 5,6 of formation waist panel 3.

As the sheet material 5,6 that forms waist panel 3, for example can use non-woven fabrics that the various method for makings such as hot-wind nonwoven cloth, fabric hot rolled nonwoven fabrics, spun-laced nonwoven fabric, spun-bonded non-woven fabrics, melt spraying non-woven fabrics obtain, weave cotton cloth, woven cloth, paper, resin molding etc., and by integrated sheet material forming of two or more material laminates in them etc.In addition, as pull stap 8, for example, can use parts that form by the hook part of the stickup such as thermal welding, bonding agent mechanical fasteners on a face with base material at non-woven fabrics etc. etc.

Form the elastomeric element 26 of use as linear elastic bodies 7, the elastomeric element 25, leg creases that form stereo enclosure, can use the retractility material of the wire of polyethylene-alpha olefin copolymers such as comprising natural rubber, polyurethane, polystyrene-poly isoprene copolymer, polystyrene-poly butadiene copolymer, ethyl acrylate-ethylene etc.Linear elastic bodies of the present invention and elastomeric element comprise that cross section is the material of circular, square and oval, the cross section thin width band shape that is rectangle etc., also comprises the material of multifilament type.The width (or diameter) of linear elastic bodies of the present invention is for example below the above 3mm of 0.1mm, is preferably below 1mm.In addition, the width of elastomeric element (or diameter) is for example below the above 5mm of 0.1mm, is preferably below the above 3mm of 0.1mm.

Then, when manufacturing the waist panel 3 (Stretchable sheet) of above-mentioned diaper 1 as example, with reference to the accompanying drawings of the preferred implementation of the manufacture method of Stretchable sheet of the present invention.In Fig. 2 and Fig. 3, schematically show the manufacturing installation 11 of the manufacture method of the waist panel 3 (Stretchable sheet) that is applicable to the first embodiment.

As shown in Figures 2 and 3, manufacturing installation 11 is devices of manufacturing continuously as the banded Stretchable sheet 3 ' of the blank of waist panel 3 (Stretchable sheet), comprising: the conveying mechanism 16 of linear elastic bodies 7; With the turning arm (elastomer winding mechanism) 14 that linear elastic bodies 7 is wound in continuously to the elastomer coiling use of conveying mechanism 16 with elongation state.Conveying mechanism 16 is included in the throughput direction (MD with banded sheet material 50,60, Machine Direction, the machine direction of equipment) orthogonal direction (CD, Cross machine Direction, with the orthogonal direction of the machine direction of equipment) the upper a pair of conveyer belt 12,13 separating.Linear elastic bodies 7 by turning arm 14 and the throughput direction Y direction of intersecting be wound in elongation state between a pair of conveyer belt 12,13.Banded sheet material the 50, the 60th, the blank of the sheet material 5,6 of formation waist panel 3.

The direction (y direction) representing with symbol y in Fig. 2 and Fig. 3 represents the throughput direction (MD) of banded sheet material 50,60, and the direction (x direction) that symbol x represents represents CD.Y direction (MD) is consistent with the throughput direction of linear elastic bodies 7 and the throughput direction of Stretchable sheet 3 ' that are wound in conveying mechanism 16 (conveyer belt 12,13), and then, also consistent with the length direction Y (with reference to Fig. 1) of diaper 1 (absorbent main body 2).In addition, x direction (CD) is consistent with the width of banded sheet material 50,60, and then, also consistent with the width X (with reference to Fig. 1) of diaper 1 (absorbent main body 2).In addition a pair of pinch roll (nip roll) 181,182 directions respect to one another of the direction shown in symbol z (z direction) expression integrated mechanism 18 in Fig. 3.

Further illustrate manufacturing installation 11, manufacturing installation 11 comprises: send continuously linear elastic bodies 7, linear elastic bodies 7 is imported to the elastomer feed mechanism 15 of turning arm (elastomer winding mechanism) 14 with elongation state; The linear elastic bodies of being reeled by turning arm 14 7 is transported to the conveying mechanism 16 between a pair of banded sheet material 50,60; Have adhesive applicatings such as hot-melt adhesives in the applying device 17 of the applying mechanism 172 of banded sheet material 50; Use a pair of pinch roll 181,182 that the linear elastic bodies of elongation state 7 is fixed on to the integrated mechanism 18 between a pair of banded sheet material 50,60; From the both ends along throughput direction (y direction) of banded sheet material 50,60 to the extended linear elastic bodies 7 of foreign side, remove the shut-off mechanism 19 of linear elastic bodies 7 with respect to the reeling condition of conveying mechanism 16 (conveyer belt 12,13) with cut-out.

As shown in Figure 3, the conveyer belt 12 of conveying mechanism 16 is rotating bands of ring-type (endless), comprises bilevel epipelagic zone 12a and the band 12b of lower floor.Epipelagic zone 12a is erected between two pulleys that rotating shaft direction is configured in z direction, and one of them pulley is the pulley 122 that is configured in the upstream side of integrated mechanism 18, and another pulley is the pulley 121 that is configured in the downstream of integrated mechanism 18.In addition, lower floor is erected between two other pulley that rotating shaft direction is configured in z direction with 12b, one of them pulley is the pulley 125 that is configured in the upstream side of integrated mechanism 18 and is positioned at the below of pulley 122, and another pulley is the pulley 124 that is configured in the downstream of integrated mechanism 18 and is positioned at the below of the above-mentioned pulley 121 that epipelagic zone 12a is set up in.Each wheels arrangements is in the foreign side of the end along throughput direction (y direction) of banded sheet material 50,60.At the pulley 121,124 in downstream, be connected with not shown servomotor at its drive division, utilize this servomotor can change epipelagic zone 12a and lower floor with 12b rotary speed separately.

The conveyer belt 13 of conveying mechanism 16 is also same with conveyer belt 12 is the rotating band of ring-type, as shown in Figure 3, comprises bilevel epipelagic zone 13a and the band 13b of lower floor.Conveyer belt 13 similarly forms with conveyer belt 12, and two are set up in respectively and clip between two pulleys 132,131 or pulley 135,134 that integrated mechanism 18 is disposed at upstream side and downstream with 13a, 13b.Epipelagic zone 13a and lower floor are respectively the structure same with levels band 12a, the 12b of conveyer belt 12 with 13b, can drive the change with rotary speed.

Conveyer belt 12 (epipelagic zone 12a, the band 12b of lower floor) and conveyer belt 13 (epipelagic zone 13a, the band 13b of lower floor) are set up in respectively above-mentioned each pulley, are configured to downstream thus from the upstream side of a pair of pinch roll 181,182 (integrated mechanism 18).As shown in Figure 2, two with 12,13 foreign sides that are positioned at the end along throughput direction (y direction) of banded sheet material 50,60, are configured to mutually symmetrical.Two with 12,13 with outer circumferential side separately in y side upwardly extending mode rotate.Be with 12,13 to be all preferably Timing Belt (timing belt) for two.Two with 12,13 rotary speed, is configured in the control part (not shown) that the rotary speed of the servomotor (not shown) of the drive division of the pulley (not shown) in downstream has by control device 11 and controls.

As shown in Figures 2 and 3, turning arm (elastomer winding mechanism) 14 comprises: the arm 141 with axial region 142, rotating part 143 and linking part 144; Taking the centrage of axial region 142 as rotating shaft, the driving mechanism 147 that arm 141 is rotated.Linking part 144 is angularly combined respectively with axial region 142 and rotating part 143, rotating part 143 and axial region 142 almost parallels.As shown in Figure 3, axial region 142 has the introducing port 145 of linear elastic bodies 7 in its one end, in addition, rotating part 143 has the export mouth 146 of linear elastic bodies 7 in its one end, the linear elastic bodies 7 importing from introducing port 145 derives from export mouth 146 smoothly by axial region 142, linking part 144 and rotating part 143.At bending section and the export mouth 146 etc. of arm 141, can configure the various known parts (driven voller or low friction means etc.) that can reduce the friction between linear elastic bodies 7.

Rotating part 143 with export mouth 146 be positioned at than the end of the upstream side of conveyer belt 12 (epipelagic zone 12a, lower floor band 12b) and conveyer belt 13 (epipelagic zone 13a, lower floor are with 13b) more the mode of downstream configure.As shown in Figure 3, at the drive division (axial region 142) of turning arm 14 (elastomer winding mechanism), servomotor 148 is installed, by the rotation of servomotor 148, rotating part 143 rotates two peripheries with 12,13.The diameter of the track that export mouth 146 rotates is greater than the distance between the outer surface of a pair of conveyer belt 12,13.Utilize such turning arm 14, the linear elastic bodies being taken into 7 can be wound in continuously to two ends with 12,13 upstream side and be wound in outer circumferential side separately.The rotary speed of turning arm 14 is that the control part (not shown) that the rotary speed of servomotor 148 is had by manufacturing installation 11 is controlled.

As shown in Figure 3, elastomer feed mechanism 15 comprises: package has the roll body 70 of linear elastic bodies 7; The brake that utilizes that is positioned at the downstream of roll body 70 applies the tension mechanism 151 of tension force to linear elastic bodies 7; Be positioned at tension mechanism 151 downstream export the outlet roller 152 of linear elastic bodies 7 from roll body 70; Be positioned at the downstream of outlet roller 152, for measuring the tension draftomter 153 of tension force.The rotating shaft direction of outlet roller 152 is configured in x direction (with the orthogonal direction of the throughput direction of sheet material).At outlet roller 152, at its drive division, servomotor (not shown) is installed.Outlet roller 152 uses in its periphery 2 weeks linear elastic bodies 7 of reeling.The control part (not shown) that utilizes manufacturing installation 11 to have, detection output based on tension draftomter 153, the rotary speed that can control not shown servomotor is the rotary speed of outlet roller 152, with the tension force specifying, linear elastic bodies 7 is reeled and is sent from roll body 70.

As shown in Figure 3, elastomer feed mechanism 15 has the feeding roller 156 in the downstream that is positioned at outlet roller 152.Feeding roller 156 is configured between turning arm (elastomer winding mechanism) 14 and outlet roller 152, and its rotating shaft direction is configured in x direction.Feeding roller 156 is provided with servomotor (not shown) at its drive division.The rotary speed of not shown servomotor is that the control part (not shown) that the rotary speed of feeding roller 156 is had by manufacturing installation 11 is controlled.

As shown in Fig. 2 and Fig. 4 (a), applying device 17 has the applying mechanism 172 to banded sheet material 50 adhesive-applyings.Never the containing box of illustrated bonding agent is supplied with bonding agent via the feed path of regulation to applying mechanism 172.As shown in Fig. 4 (a), applying mechanism 172 is formed with: discharge the outlet E for form the bonding agent 10 ' (central junction surface formation bonding agent) at central junction surface 10 at Stretchable sheet 3 '; With the outlet F that discharges the bonding agent 9 ' (engaged at end portion forms the bonding agent of use) for form engaged at end portion 9 at Stretchable sheet 3 '.Outlet E is arranged on the position relative with the width central part of banded sheet material 50, outlet F be arranged on be positioned at the two ends of both sides of above-mentioned width central part of banded sheet material 50 near the relative position of portion.

In the first embodiment, outlet E is connected with feed path 173 via the identical containing box (not shown) sharing with outlet F, and the bonding agent of one species is discharged from two outlet E, F, is coated on banded sheet material 50.

Can use known adhesive applicating mechanism as applying mechanism 172.Can be the contact-type applying mechanism that the applicator head of applying mechanism contacts with coated, can be also the non-contact type applying mechanism that the applicator head of applying mechanism does not contact with coated.For example can enumerate slot applicator, gravure applicator, rotatable silk screen applicator etc. as contact-type applying mechanism.As non-contact type applying mechanism, for example, can use sprayer, drop-coated applicator (bead coater), curtain formula applicator etc.In addition, can use metal pipe or flexible pipe etc. as feed path.

As shown in Figure 2, integrated mechanism 18 has a pair of pinch roll 181,182.A pair of pinch roll 181,182 is positioned between the inner circumferential side of conveyer belt 12 (epipelagic zone 12a, the band 12b of lower floor) and the inner circumferential side of conveyer belt 13 (epipelagic zone 13a, the band 13b of lower floor).

In the first embodiment, as shown in Fig. 2 and Fig. 4 (a), as a pair of pinch roll 181,182, one side's pinch roll 181 uses at the central part of axial length direction has the minor diameter part M that diameter is relatively little, and has the relatively large large-diameter portion S of diameter, the parts of S at the both ends of axial length direction.The opposing party's pinch roll 182 diameter in the whole width range of banded sheet material 50,60 is certain.

The minor diameter part M of pinch roll 181, as shown in Fig. 4 (a), the central junction surface of being inserted with between the two in banded sheet material 50,60 is formed to the position pressurization of the bonding agent 10 ' of use, large-diameter portion S, the S of pinch roll 181 forms the bonding agent 9 ' of use, 9 ' position pressurization to the engaged at end portion that is inserted with between the two in banded sheet material 50,60.

Can use the columnar roller of metal columnar roller, soft silicon system as pinch roll 182.Use except being formed as and be provided with the cylindrical shape of step difference at side face as pinch roll 181, there are the parts of the structure same with pinch roll 182.

A pair of pinch roll 181,182 is provided with servomotor (not shown) at either party's drive division, and the control part being had by manufacturing installation 11 (not shown) is controlled rotary speed.Be provided with and drive the gear that transmits use at a pair of pinch roll 181,182 rotating shaft separately.By not shown driving mechanism, speed of production that can be based on Stretchable sheet, the rotary speed of controlling not shown servomotor is the rotary speed of the side in a pair of pinch roll 181,182.Now, transmit the engagement of the gear of use by driving, driving force is also passed to the opposing party in a pair of pinch roll 181,182, can make a pair of pinch roll 181,182 rotations.The bearing portions of a pair of pinch roll 181,182, for the linear elastic bodies of elongation state 7 being fixed on reliably between a pair of banded sheet material 50,60, utilizes the power such as oil pressure, pneumatics, spring, to bearing portions pressurization separately.

As shown in Figure 2, to have in the part contacting with the linear elastic bodies 7 transporting be the sickle 190 of sharp-pointed cut-out sword to shut-off mechanism 19.Sickle 190 utilizes not shown supporting mass to be configured in the position contacting with linear elastic bodies 7, and linear elastic bodies 7 is carried by conveyer belt 12,13, presses on sickle 190, is cut off thus.Compare by a pair of pinch roll 181,182 linear elastic bodies 7 and banded sheet material 50,60 slightly downstreams of integrated position the position of shut-off mechanism 19.As shut-off mechanism 19, can use without particular limitation the various well-known components that can cut off linear elastic bodies 7, for example can use to possess at outer peripheral face circumferentially to have the cutting roller that cuts off sword and a roll-type sickle of anvil roller that bears this cut-out sword whole, also can use can be by the shut-off mechanism of the cut-out such as laser or heat linear elastic bodies 7.

In the first embodiment, use the manufacturing installation 11 of such structure, manufacture waist panel 3 as described below and the Stretchable sheet 3 ' as the continuum of waist panel 3.

First, as shown in Figures 2 and 3, continuous wave output linear elastic bodies 7, imports the turning arm 14 (supply operation) as elastomer winding mechanism by the linear elastic bodies 7 of output using elongation state.Describe in detail as follows, use outlet roller 152, have the take up roll 70 continuous wave output linear elastic bodies 7 of linear elastic bodies 7 from package.In the time of output, the detection of the tension force of the linear elastic bodies 7 based on being obtained by tension draftomter 153 is exported, the control part (not shown) that utilizes manufacturing installation 11 to have, adjusts the rotary speed that rolls out roller 152, exports linear elastic bodies 7 with the tension force specifying from take up roll 70.Then, this linear elastic bodies 7 is imported to turning arm 14, in the time importing, utilize above-mentioned feeding roller 156, the speed of the linear elastic bodies 7 that imports turning arm 14 (elastomer winding mechanism) is adjusted into certain speed and imports.Making boot speed is the speed corresponding with the winding speed that is wound in conveying mechanism 16 (a pair of conveyer belt 12,13).

As shown in Figure 2, after above-mentioned supply operation, use turning arm 14 (elastomer winding mechanism) that linear elastic bodies 7 is wound in to conveying mechanism 16 (a pair of conveyer belt 12,13) in the direction of intersecting with the throughput direction (y direction) of banded sheet material 50,60 with elongation state, utilize conveying mechanism 16 to be delivered between a pair of banded sheet material 50,60 (conveying operation) linear elastic bodies 7 after coiling.Describe in detail as follows, be supplied to the linear elastic bodies 7 in turning arm 14 with elongation state, as shown in Figure 3, import in arm 141 from introducing port 145, in axial region 142, linking part 144 and rotating part 143, derive from export mouth 146.The linear elastic bodies 7 deriving from export mouth 146 is exported when turning arm 14 rotates, is wound in thus the outer circumferential side of the outer circumferential side of end of the upstream side of conveyer belt 12 (epipelagic zone 12a, the band 12b of lower floor) and the end of the upstream side of conveyer belt 13 (epipelagic zone 13a, the band 13b of lower floor)., advance by the rotation of conveyer belt 12,13, linear elastic bodies 7 continuously helically volume is hung on two with 12,13 outer circumferential sides separately herein.The linear elastic bodies 7 that is hung on conveying mechanism 16 with elongation state volume so is continuously delivered between a pair of banded sheet material 50,60 in downstream.

Herein, just volume is hung on conveying mechanism 16 (a pair of conveyer belt 12,13) linear elastic bodies 7 afterwards and extends to form its volume extension length in the direction of intersecting with y direction (throughput direction of sheet material), but with the orthogonal direction (x direction) of y direction on do not extend.For the prolonging direction of just rolling up the linear elastic bodies 7 after hanging is modified to x direction, for example, in the situation that volume hangs with linear elastic bodies 7 as shown in Figure 2, in conveyer belt 12, make the rotary speed of epipelagic zone 12a slower with the rotary speed of 12b than lower floor, in conveyer belt 13, make the rotary speed of lower floor with 13b than the rotary speed of epipelagic zone 13a slowly.By like this suitably adjusting the rotary speed of conveyer belt 12,13, can make the inclination (prolonging direction) of the linear elastic bodies 7 in carrying to y direction gradually change, linear elastic bodies 7 is being transported between a pair of banded sheet material 50,60 to (between a pair of pinch roll 181,182) before, the adjustment in direction different from x direction when the inclination of linear elastic bodies 7 can be hung from firm volume is x direction.

As shown in Figure 2, banded sheet material 50,60 is all before adhesive-applying, by not shown folder (セ ー ラ ー) etc., by the both sides along its throughput direction (y direction) (both ends of x direction) outwards face side (with the opposition side of the opposite face of another the banded sheet material converging) turn back.Then, as shown in Fig. 4 (a), use applying device 17, at the width central part of the face (with the opposite face of another the banded sheet material 50 converging) of banded sheet material 50, apply central junction surface and form with bonding agent 10 ', and the both sides of width central part in this face of banded sheet material 50 form the bonding agent 9 ' of use in application tip junction surface respectively.

Bonding agent 10 ' with the adhesive applicating portion of the thinner wire of multiple width respectively along the throughput direction continuous linear shape of sheet material 50 the mode that forms apply.In addition, bonding agent 9 ' with two adhesive applicating portions of band shape respectively along the throughput direction continuous linear shape of sheet material 50 the mode that forms apply.

Then, a pair of above-mentioned banded sheet material 50,60 after adhesive applicating operation and the linear elastic bodies 7 of being carried by conveying mechanism 16 are converged, the a pair of banded sheet material 50,60 that clips this linear elastic bodies 7 is pressurizeed integratedly, obtain composite sheet 30A (Stretchable sheet 3 ') (integrated operation).Describe in detail as follows, roll up continuously the linear elastic bodies 7 of the elongation state that is hung on conveying mechanism 16 (a pair of conveyer belt 12,13) to 181,182 supplies of a pair of pinch roll, and by a pair of banded sheet material 50,60 with carry in the relative mode of linear elastic bodies 7 supply with, they are converged.Two sheet materials 50,60 converge in the mode of fixing linear elastic bodies 7 between the two, to grip between two sheet materials 50,60 that the state of linear elastic bodies 7 imports a pair of pinch roll 181,182 and pressurized.

Now, between large-diameter portion S, the S and pinch roll 182 of pinch roll 181, the part that has the bonding agent 9 ' that engaged at end portion uses between the two in banded sheet material 50,60 is pressurized, and, between the minor diameter part M and pinch roll 182 of pinch roll 181, the part that has the bonding agent 10 ' that central junction surface uses between the two in banded sheet material 50,60 is pressurized.

Thus, obtain between banded sheet material 50,60 by the composite sheet 30A of bonding agent 9 ' and bonding agent 10 ' joint.

Then, the lateral margin along throughput direction (y direction) from composite sheet 30A is cut off to the linear elastic bodies 7 of the extended elongation state of foreign side of this composite sheet 30A, this linear elastic bodies 7 is shunk, have respectively in a sidepiece in the y-direction and the other side of this composite sheet 30A the cut-out end (cut-out operation) producing due to the cut-out of this linear elastic bodies 7.Describe in detail as follows, by be erected in the linear elastic bodies 7 that becomes elongation state between a pair of conveyer belt 12,13, from the extended position of the both side edges along throughput direction (y direction) (both side edges of the x direction of composite sheet 30A) of composite sheet 30A (a pair of banded sheet material 50,60), cut off by above-mentioned sickle 190.By the cut-out of this linear elastic bodies 7, the reeling condition with respect to a pair of conveyer belt 12,13 (conveying mechanism 16) of linear elastic bodies 7 is disengaged, and the state that banded Stretchable sheet 3 ' is turned back respectively to outer surface side with the both sides in the y-direction (both ends of x direction) of banded sheet material 50,60 is obtained.After the cut-out of linear elastic bodies 7, use not shown folder etc., make the banded sheet material 50,60 that forms banded Stretchable sheet 3 ' become the state of not turned back, obtain thus the banded Stretchable sheet 3 ' shown in Fig. 4 (b).

The unit length (product length) that the banded Stretchable sheet 3 ' obtaining is like this cut to regulation by not shown known shut-off mechanism, obtains the waist panel 3 (Stretchable sheet) as target thus.

In the first embodiment, as mentioned above, at the large-diameter portion S of pinch roll 181, between S and pinch roll 182, to banded sheet material 50, the part that has the bonding agent 9 ' that engaged at end portion uses between the two in 60 is pressurizeed, and, between the minor diameter part M and pinch roll 182 of pinch roll 181, to banded sheet material 50, the part that is inserted with the bonding agent 10 ' of using at central junction surface between the two in 60 is pressurizeed, therefore, at a pair of pinch roll 181, while pressurization between 182, the bonding agent 9 ' that engaged at end portion uses is pressurizeed relatively doughtily in the part that results from gap (interval between the side face) relative narrower between the side face of large-diameter portion S and the side face of pinch roll 182, and the bonding agent 10 ' that central junction surface forms use is pressurizeed by relatively weak resulting from the relatively large part in gap (interval between side face) between the side face of minor diameter part M and the side face of pinch roll 182., the engaging condition in integrated operation between a pair of banded sheet material is different for the bonding agent 10 ' of central junction surface formation use from the bonding agent 9 ' that engaged at end portion forms use.Specifically the pressure that the pressure that the bonding agent 9 ' of, junction surface, end being used pressurizes pressurizes than the bonding agent 10 ' that central junction surface is formed to use is stronger.

Therefore, in composite sheet 30A and Stretchable sheet 3 ', form the engaged at end portion 9,9 that forms the bonding agent 9 ' firm engagement of use between banded sheet material 50,60 via engaged at end portion, in these engaged at end portions 9,9, linear elastic bodies 7 is compared by relative and is fixed more firmly with central junction surface 10, can prevent the disengaging of linear elastic bodies 7.On the other hand, between engaged at end portion 9,9 in composite sheet 30A, Stretchable sheet 3 ', form the central junction surface 10 that forms the bonding agent 10 ' joint of use between banded sheet material 50,60 via central junction surface, but the bonding agent 10 ' that forms central junction surface 10 is pressurizeed by weak than the bonding agent 9 ' that forms engaged at end portion 9, therefore can prevent that this bonding agent 10 ' from being expanded to the width of two sheet materials 50,60 by conquassation.Therefore, the region aeration excellence at the central junction surface 10 in composite sheet 30A, Stretchable sheet 3 ', and flexibility excellence.Like this, can manufacture efficiently and be difficult for the situation that linear elastic bodies 7 departs from from engaged at end portion 9,9 occurs, and Stretchable sheet 3 ' and the waist panel 3 of engaged at end portion 9,9 aerations, flexibility and retractility excellences.

In addition, the bonding agent 10 ' at central authorities junction surface 10 is formed by relatively weak pressurization compared with engaged at end portion 9, therefore at central junction surface 10, between banded sheet material 50,60, engaged by relatively weak compared with engaged at end portion 9, linear elastic bodies 7 fixing also relatively a little less than, but central junction surface 10 forms each other at pair of end portions junction surface 9, therefore can not produce peeling off and the problem of the disengaging of linear elastic bodies 7 of 50,60 of sheet materials at central junction surface 10.

In addition, the width W 1 (with reference to Fig. 1) of engaged at end portion 9, near reliable fixing viewpoint from the end of linear elastic bodies 7 or it, more than being preferably 3mm, more preferably more than 5mm, in addition, be preferably below 20mm, more preferably below 10mm, in addition, be preferably below the above 20mm of 3mm, more preferably below the above 10mm of 5mm.

On the other hand, the width W 2 (with reference to Fig. 1) at central authorities junction surface 10, from form the viewpoint of the good pars contractilis 10B of aeration and retractility between engaged at end portion 9, more than being preferably 0.1mm, more preferably more than 0.5mm, in addition, be preferably below 5mm, more preferably below 1.5mm, in addition, be preferably below the above 5mm of 0.1mm, more preferably below the above 1.5mm of 0.5mm.From the same viewpoint, more than the interval W4 (with reference to Fig. 1) at the interval W3 (with reference to Fig. 1) at adjacent engaged at end portion 9 and central junction surface 10 and 2 adjacent central junction surfaces 10,10 is preferably 1mm respectively, more preferably more than 3mm, in addition be preferably below 10mm, more preferably below 7mm, in addition, be preferably below the above 10mm of 1mm, more preferably below the above 7mm of 3mm.

In addition, the interval W5 (with reference to Fig. 1) of adjacent two linear elastic bodies 7,7 in the Y direction, more than being preferably 2mm, more preferably more than 4mm, in addition, be preferably below 12mm, more preferably below 10mm, in addition, be preferably below the above 12mm of 2mm, more preferably below the above 10mm of 4mm.

As described in the first embodiment, at a roller 181, large-diameter portion S is set, S and minor diameter part M, the part of pressurizeing at the bonding agent 10 ' that central junction surface is formed to use and the part that the bonding agent 9 ' of junction surface, end formation use is pressurizeed, put on a pair of banded sheet material 50, in the different situation of 60 pressure, large-diameter portion S, the difference of the diameter of S and minor diameter part M can be according to banded sheet material 50, 60 thickness etc. suitably determine, but from large-diameter portion S, the part that S and minor diameter part M pressurize arranges the viewpoint of sufficient pressure differential and sets out, large-diameter portion S, poor (Rs-Rm) of the radius R s of S and the radius R m of minor diameter part M, large-diameter portion S, gap between the roller in S and minor diameter part M poor, preference is as being more than 0.01mm, more preferably below the above 1mm of 0.01mm.

The diaper 1 with waist panel 3 for example can be manufactured by the following method.

; be cut to discontinuously the size of the amount of single diaper after fixed agraffe band 8 at the Stretchable sheet 3 ' obtaining as mentioned above; or, Stretchable sheet 3 ' is cut to fixed agraffe band 8 after the size of amount of single diaper, obtain thus the waist panel 3 shown in Fig. 1.In the manufacture of this waist panel 3, preferably obtain the installation site a pair of waist panel 3,3 of different symmetrical shapes mutually of pull stap 8 from two Stretchable sheets 3 '.

Outside the manufacture of waist panel 3,3, in carrying the continuum of face sheet 21 continuously, engage respectively stereo enclosure in the both sides of its throughput direction and form the continuum with sheet material 24, obtain compound continuous sheet.

Then,, in carrying this compound continuous sheet continuously, to its both sides, the waist panel of the pair of right and left obtaining from two Stretchable sheets 3 ' 3,3 is arranged to compartment of terrain at the throughput direction of compound continuous sheet fixing successively by phased manner.Then, make the continuum of itself and back-sheet 22 clip absorber 23,23 with between ... mode converge and integrated.In the time that this is integrated, in many elastomeric elements 25 and the tab member 34 of the both sides of absorber 23 configuration elongation state, these are also fixed on stereo enclosure and form with between the continuum of sheet material 24 and the continuum of back-sheet 22.

Like this, the both sides that are manufactured on the continuum of absorbent main body 2 are fixed with the continuum of the diaper 1 that multipair waist panel 3 forms.Herein, throughput direction (y direction) when the throughput direction (y direction) of the continuum of absorbent main body 2 and manufacture waist panel 3 (Stretchable sheet) is equidirectional, does not need 90 ° of waist panel 3 (Stretchable sheet) reversions.

Then, utilize known shut-off mechanism (not shown) continuum of diaper 1 to be cut to the size of single diaper 1, can manufacture successively thus multiple diapers 1.

Another embodiment of the manufacture method of Stretchable sheet of the present invention is then described.For other embodiment described later, the main explanation aspect different from above-mentioned the first embodiment, marks identical Reference numeral and description thereof is omitted for identical aspect.Do not have the aspect of special instruction to explain in the same manner with the first embodiment.

As shown in Figure 5, in the manufacture method of the second embodiment of the present invention, as in the pair of rolls 181,182 to use in clipping the integrated operation of state one pressurization of linear elastic bodies 7 by a pair of banded sheet material 50,60, at least one party's roller 181 is included in upper multiple short roller 181s, 181m, the 181s arranging of width (x direction) of a pair of banded sheet material 50,60.As shown in Figure 5, a side or two sides of a pair of banded sheet material 50,60, coating is in advance used to form the bonding agent 9 ' of the engaged at end portion same with the engaged at end portion of the first embodiment and is used to form the bonding agent 10 ' at the central junction surface same with the central junction surface of the first embodiment, these banded sheet materials 50,60, to clip the state of linear elastic bodies 7 between the two, are being comprised to the roller 181 of multiple short rollers and be not divided into pressurization between the roller 182 of multiple short rollers.

Short roller 181s, 181s are configured in the position that forms the coating location overlap of the bonding agent 9 ' of use with engaged at end portion on the width of banded sheet material 50,60, and short roller 181m is configured in the position that forms the coating location overlap of the bonding agent 10 ' of use with central junction surface.In the second embodiment, short roller 181s, 181m, 181s are configured in the same position on the throughput direction (y direction) of banded sheet material 50,60, and side face is separately relative with the side face of the roller 182 sharing.

Short roller 181s, 181m in illustrative example, 181s comprise respectively: the axle supporting mass 181a that props up rotating shaft for axle; The elevating mechanism 181b that axle supporting mass 181a is shifted up and down; With the piezometer 181c of instrumentation by this roller applied pressure.Can use the various known mechanisms such as oil hydraulic cylinder, cylinder, capstan winch (screw jack) as elevating mechanism 181b.

In the second embodiment, the short roller 181s, the 181s that pressurize junction surface, end is formed to the bonding agent 9 ' of use, compared with the short roller 181m pressurizeing with the bonding agent 10 ' that central junction surface is formed to use, the mode of more strongly a pair of banded sheet material 50,60 being pressurizeed maintains and controls, and carries out the integrated of linear elastic bodies 7 and banded sheet material 50,60 simultaneously.For example, can the gap between short roller 181s, 181s and roller 182 be set narrowlyer than the gap between short roller 181m and roller 182, make the value in each gap be fixed as certain value, carry out the pressurization of linear elastic bodies 7 and banded sheet material 50,60, also can monitor by short roller 181s applied pressure with by short roller 181m applied pressure, in the mode always their pressure differential being maintained within a certain range, short roller is moved up and down, carry out the pressurization of linear elastic bodies 7 and banded sheet material 50,60 simultaneously.Can use various known automatons to carry out maintaining of pressure that the supervision of pressure and the lifting based on short roller cause.

In the second embodiment, also make the engaging condition in integrated operation between a pair of banded sheet material, the bonding agent 10 ' that forms use for central junction surface is different from the bonding agent 9 ' that engaged at end portion forms use.

More particularly, the pressure difference of pressing while making to make to engage between a pair of banded sheet material by bonding agent.; according to the manufacture method of the second embodiment; between short roller 181s, 181s and pinch roll 182; the part of the bonding agent 9 ' that the engaged at end portion that is inserted with between the two in banded sheet material 50,60 uses is pressurizeed relatively doughtily; between short roller 181m and pinch roll 182, the part that is inserted with the bonding agent 10 ' of using at central junction surface between the two in banded sheet material 50,60 is pressurizeed by relatively weak.Thus, same with the first embodiment, can manufacture efficiently and be difficult for the situation that linear elastic bodies 7 departs from from engaged at end portion 9,9 occurs, and Stretchable sheet 3 ' and the waist panel 3 of engaged at end portion 9,9 aerations, flexibility and retractility excellences.

In the manufacture method of the 3rd embodiment of the present invention, as shown in Fig. 6 (a) and Fig. 6 (b), manufacturing installation as Stretchable sheet 3 ' uses following apparatus, and it comprises: the pair of first rolls 183,184 that forms engaged at end portion 9 for the sidepiece 3A of the side at the Stretchable sheet 3 ' of manufacturing; Form a pair of second roller 185,184 of engaged at end portion 9 for the sidepiece 3C of the opposing party at the Stretchable sheet 3 ' of manufacturing; With a pair of the 3rd roller 186,187 for form central junction surface 10 at the width central part of Stretchable sheet 3 ' of manufacturing, the 3rd roller 186,187 is arranged on compared with each of the first roller 183,184 in the throughput direction (y direction) of banded sheet material 50,60 and second roller 185,184 all to the position of trip more on the lower.

Then, as shown in Fig. 6 (b), the bonding agent 10 ' that is used to form the bonding agent 9 ' of engaged at end portion 9 by applying device 17 coatings and is used to form central junction surface 10 at the one side of a side banded sheet material 50 afterwards, makes this band shape sheet material 50 and the opposing party's banded sheet material 60 converge in the mode that clips linear elastic bodies 7 between two sheet materials 50,60.Then, first the bonding agent 9 ', 9 ' the position that exist engaged at end portion to form use in this band shape sheet material 50,60 are clipped between pair of first rolls 183,184 or between a pair of second roller 185,184 and are pressurizeed.Thus, form pair of end portions junction surface 9,9 at both sides 3A, the 3C of the Stretchable sheet 3 ' of manufacturing.Then, then, the position of the bonding agent 10 ' of the existence central authorities junction surface formation use in banded sheet material 50,60 is clipped between a pair of the 3rd roller 186,187 and is pressurizeed.Thus, form multiple central junction surfaces 10,10 at the central pars contractilis 3B of the Stretchable sheet 3 ' of manufacturing.

In the 3rd embodiment, also make the engaging condition in integrated operation between a pair of banded sheet material, the bonding agent 10 ' that forms use for central junction surface is different from the bonding agent 9 ' that engaged at end portion forms use.

Be described more specifically as follows, in the manufacture method of the 3rd embodiment, as shown in Fig. 6 (b), same position on the throughput direction (flow direction) of banded sheet material 50, application tip junction surface forms the bonding agent 9 ' of use and the bonding agent 10 ' of central junction surface formation use, play the time of this bonding agent 9 ' being pressurizeed by the first and second rollers from adhesive-applying 9 ' on banded sheet material 50, and play the asynchronism(-nization) of being pressurizeed by the 3rd roller from adhesive-applying 10 ' on banded sheet material 50.Therefore,, even if be coated in the hot-melt adhesive of heating and melting in identical temperature as bonding agent 9 ' and bonding agent 10 ', owing to being clipped in the temperature difference of the bonding agent while pressurizeing between sheet material 50,60, the viscosity of bonding agent produces difference.

In the embodiment shown in Fig. 6 (a) and Fig. 6 (b), form the bonding agent 9 ' of use from application tip junction surface and play the time of this bonding agent 9 ' being pressurizeed by the first and second rollers forms use bonding agent 10 ' than from applying central junction surface to play the time of between the 3rd roller, bonding agent 10 ' being pressurizeed short.Therefore,, grammes per square metre of temperature in the time being coated on banded sheet material 50, kind, coating etc. is identical, bonding agent 9 ' is higher than the temperature of bonding agent 10 ', that is, pressurized together with sheet material 50,60 with the state that viscosity is low.Therefore, compared with the central junction surface 10 being engaged by bonding agent 10 ' between banded sheet material 50,60, in 50,60 engaged at end portions 9 that engaged by bonding agent 9 ' of banded sheet material, banded sheet material 50,60 bond strength and linear elastic bodies is to each other relatively high to the constant intensity of sheet material 50,60.In addition, when the bonding agent 10 ' of temperature lower (being that viscosity is high) is pressurized between roller, be difficult for expanding the aeration that difficult generation bonding agent 10 ' causes and the decline of retractility on the width of sheet material.

Like this, according to the 3rd embodiment, can manufacture efficiently linear elastic bodies 7 and be difficult for departing from from engaged at end portion 9,9, and Stretchable sheet 3 ' and the waist panel 3 of engaged at end portion 9,9 aerations, flexibility and retractility excellences.

From the coating position P1 of bonding agent 10 ' to the distance (L2) of the position P3 of this bonding agent 10 ' that pressurizeed by roller with coating position P1 from the bonding agent 9 ' ratio (L2/L1) to the distance (L1) of the position P2 of this bonding agent 9 ' that pressurizeed by roller, be preferably more than 1.1, more preferably more than 1.2, in addition be preferably below 5, more preferably below 2, in addition, be preferably more than 1.1 below 5, more preferably more than 1.2 below 2.In addition, above-mentioned distance L 1, L2 measure and obtain along the transport path of the banded sheet material of each bonding agent of coating.

In addition, in the manufacturing installation using in the 3rd embodiment, the roller 185 of a side in roller 183 and the second roller 185,184 of a side in the first roller 183,184, as shown in Fig. 6 (a), in x direction, separate, on the other hand, the roller 184 of the opposing party in roller 184 and the second roller 185,184 of the opposing party in the first roller 183,184, is the tubular roller that diameter shares uniformly in the roughly whole width of banded sheet material 50,60.Replace which, as the roller 184 of the first roller and the roller 184 of second roller, also can use the different roller separating in x direction.In addition,, point be arranged two rollers in x direction as roller 183 and roller 185 in the situation that, two rollers can have a shared rotating shaft, can be also that two rollers have independent separately rotating shaft.

In the manufacture method of the 4th embodiment of the present invention, use the manufacturing installation of the Stretchable sheet 3 ' shown in Fig. 7.The manufacturing installation of the Stretchable sheet 3 ' shown in Fig. 7, as at a pair of banded sheet material 50, the integrated mechanism 18 of the linear elastic bodies 7 of 60 fixing elongation states, use and have respectively at banded sheet material 50, the uniform a pair of pinch roll 181 ' of diameter in 60 roughly whole width range, 182 mechanism, and, banded sheet material 50 application tip junction surfaces are formed the bonding agent 9 ' of use and central junction surface form use bonding agent 10 ' applying device 17 with by a pair of pinch roll 181 ', the banded sheet material 50 of 182 pressurization, between 60 position P4, be provided with the cooling body 20 of cooling bonding agent.The structure of applying device 17 is same with the applying device 17 shown in Fig. 6 (a).Cooling body 20 only carries out cooling to the bonding agent 10 ' in bonding agent 9 ' and bonding agent 10 ', or compared with bonding agent 9 ', cooling more strongly to bonding agent 10 '.

As cooling body 20, can use to bonding agent and blow a cold wind over to carry out cooling cooling air unit, or the chill roll of contact (chill roll) etc., but from device simple structure, device is manufactured economic aspect, and cooling air unit is more preferred.

In the 4th embodiment, also make the engaging condition in integrated operation between a pair of banded sheet material, the bonding agent 10 ' that forms use for central junction surface is different from the bonding agent 9 ' that engaged at end portion forms use.

More particularly, in the manufacture method of the 4th embodiment, as shown in Figure 7, on the one side of a side banded sheet material 50, the bonding agent 10 ' that utilizes applying device 17 coating to be used to form the bonding agent 9 ' of engaged at end portion 9 and to be used to form central junction surface 10 afterwards, utilize the cooling bonding agent 10 ' of cooling body 20, the temperature of this bonding agent 10 ' is declined.On the other hand, for bonding agent 9 ', do not carry out in fact cooling or make cooling degree a little less than, maintain than the high state of bonding agent 10 ' temperature.

Then,, under this state, by banded sheet material 50 and the opposing party's banded sheet material 60, the state converging to clip the mode of linear elastic bodies 7 between two sheet materials 50,60, is clipped in them between pair of rolls 181 ', 182 and pressurizes.Now, bonding agent 9 ' is together pressurized with the high state of temperature compared with bonding agent 10 ' and sheet material 50,60.Therefore, due to viscosity compared with the higher side of a temperature side lower with temperature etc., by using the bonding agent of kind and the temperature range that can obtain high bond strength, can make compared with the central junction surface 10 engaging by bonding agent 10 ' between sheet material 50,60, in 50,60 engaged at end portions 9 that engage by bonding agent 9 ' of sheet material, sheet material 50,60 bond strength is to each other relative higher to the constant intensity of sheet material 50,60 with linear elastic bodies.In addition, when the bonding agent 10 ' of temperature lower (being that viscosity is high) is pressurized between roller, be difficult for the width expansion at sheet material, the aeration that difficult generation bonding agent 10 ' causes and the decline of retractility.

Like this, according to the 4th embodiment, can manufacture efficiently linear elastic bodies 7 and be difficult for departing from from engaged at end portion 9,9, and Stretchable sheet 3 ' and the waist panel 3 of engaged at end portion 9,9 aerations, flexibility and retractility excellences.

The manufacture method of Stretchable sheet of the present invention is not limited to above-mentioned embodiment, can suitably change.For example, in the mode shown in Fig. 1, when the overlooking of a pair of waist panel 3,3, be shaped as rectangle, but can be also trapezoidal or parallelogram.Shape when the overlooking of waist panel 3 is preferably cut off Stretchable sheet 3 ' and is obtained a pair of waist panel 3,3 o'clock, reduces as far as possible the shape of discarded part (part that can not use as waist panel 3).

In addition, in the above-described embodiment, after linear elastic bodies 7 is wound around on a pair of conveyer belt 12,13 with the state extending in direction non-orthogonal with y direction (throughput direction of sheet material) and that intersect, tilted (prolonging direction) be modified to the direction orthogonal with y direction (x direction), but also can keep angle that volume is hung on conveyer belt 12,13 not the Hang Xiu normal incidence of Jin be fixed on a pair of banded sheet material 50,60.

In addition, as elastomer winding mechanism, also can use and be included in rotating shaft part and there is the disk of introduction part of linear elastic bodies and the outstanding arm in downstream from this disk to y direction, this upper-arm circumference, around surrounding's rotation of conveyer belt 12,13, is wound in linear elastic bodies the mechanism of surrounding of conveyer belt 12,13 etc.In addition, as feeding roller 156, as shown in Figure 3, replace volume to hang material (linear elastic bodies) the structure of carrying this material, also can use with pinch roll and clip material and the structure of carrying this material etc.

In addition, as conveyer belt, also can not use a pair of conveyer belt, and use the disclosed conveyer belt of WO2005/060910.In addition, also can use in Fig. 4～6 of TOHKEMY 2002-192641 communique, record be provided with spiral fluted line bearing parts.

In addition, replace application tip junction surface on a side banded sheet material 50 to form the bonding agent 9 ' of use and the bonding agent 10 ' of central junction surface formation use, also can form at banded sheet material of the side 50 application tip junction surfaces the bonding agent 9 ' of use, apply the bonding agent 10 ' of central junction surface formation use at the opposing party's banded sheet material 60.In addition, also the bonding agent 9 ' that forms an engaged at end portion can be coated on to banded sheet material of the side, the bonding agent 9 ' that forms another engaged at end portion be coated on to the opposing party's banded sheet material.In addition, also the bonding agent 10 ' that is used to form the part in multiple central junction surfaces can be coated on to banded sheet material of the side, the bonding agent 10 ' that is used to form another part be coated on to the opposing party's banded sheet material.

In addition, replace as the 3rd embodiment, staggered in the position of the roller of the roller of the bonding agent 9 ' pressurization to junction surface, end formation use and the bonding agent 10 ' pressurization to central junction surface formation use in y direction, also can make the coating position of bonding agent 9 ' of engaged at end portion formation use and the coating position of the bonding agent 10 ' of central junction surface formation use stagger on the throughput direction of banded sheet material, make thus two bonding agents from coated until the asynchronism(-nization) of pressurizeing between roller.

In addition, replace as the 3rd embodiment, utilize only pressurize central junction surface of the 3rd roller to form the bonding agent 10 ' of use, also can utilize the 3rd roller, to central junction surface form the bonding agent 10 ' of use and engaged at end portion form use bonding agent 9 ' the two pressurize.

In addition, in the manufacture method of the 4th embodiment, on the one side of banded sheet material 50, the bonding agent 10 ' of the bonding agent 9 ' of application tip junction surface formation use and central junction surface formation use afterwards, utilize the cooling bonding agent 10 ' of cooling body 20, but also can be at adhesive-applying 9 ' and bonding agent 10 ' afterwards, not cooling bonding agent 10 ', and caking agent 9 ' also can be carried out the heating of the cooling and bonding agent 9 ' of bonding agent 10 '.

In addition, replace as engaged at end portion 9 and form the adhesive strength of comparing with central junction surface 10 between banded sheet material 50,60 and the high parts of constant intensity of linear elastic bodies 7, also can be used as 9 formation of engaged at end portion compare with central junction surface 10 adhesive strength between banded sheet material 50,60 and the low parts of constant intensity of linear elastic bodies 7.Engaged at end portion 9 now for example can be used in the movement of the cut-out end that suppresses the contraction of following the linear elastic bodies after firm cut-out, revises the irregular arrangement of the elastomeric cut-out of wire end.

In addition, also the ratio of viscosities central authorities junction surface that forms the bonding agent 9 ' of use in engaged at end portion forms under the state that the viscosity of bonding agent 10 ' of use is high, carry out the integrated of linear elastic bodies 7 and banded sheet material 50,60, manufacture and compare with central junction surface 10, the adhesive strength that banded sheet material in engaged at end portion 9 is 50,60 and the high Stretchable sheet of constant intensity of linear elastic bodies 7.

In addition,, in the pair of rolls using in integrated operation, can be also that two rollers are not driven in rotation, but contact and carry out driven rotation with banded sheet material.

The Stretchable sheet of manufacture of the present invention also can replace at width central part and has multiple central junction surfaces, but only has a central junction surface at width central part.Now, central junction surface is preferably wide than the engaged at end portion of its both sides width separately, more preferably wide than the total width of the engaged at end portion of both sides.In addition, the engaged at end portion of He Qi both sides, central junction surface also can not adjacent across non-bonding region ground or connection.

The size of the central junction surface in Stretchable sheet and the bond strength of engaged at end portion, for example can judge by following method: obtain from each junction surface, at the size (length) of the suitable direction of throughput direction (MD) when manufacturing and the test film equating respectively in the size (width) of the suitable direction of the direction (CD) orthogonal with throughput direction (MD), carrying out the disbonded test of peeling off on above-mentioned length direction between sheet material (90 ° of disbonded tests etc.) for these test films.For example length of test film is 65mm, and width is 30mm, and in the junction surface contrasting, when the narrower width of width is less than above-mentioned 30mm, the width of test film is the width at the narrower junction surface of width.

In addition, part that in an above-mentioned embodiment, description thereof is omitted and the content only having in one embodiment can suitably be applied to respectively other embodiment, in addition, and suitably phase double replacement between embodiment of the content of each embodiment.

In addition, in the first embodiment and the second embodiment, the pressure that the pressure ratio that the bonding agent 9 ' that junction surface, end is used pressurizes is pressurizeed to the bonding agent 10 ' of central junction surface formation use is strong, but also can pressurize more strongly to the bonding agent 10 ' of central junction surface formation use.In addition, in the 3rd embodiment, make the bonding agent 9 ' that forms use from application tip junction surface play the time to bonding agent 9 ' pressurization at the first and second rollers, short compared with playing the time of between the 3rd roller, bonding agent 10 ' being pressurizeed with the bonding agent 10 ' that forms use from applying central junction surface, but also can make the time of the bonding agent 10 ' pressurization to central junction surface formation use shorter.In addition, in the 4th embodiment, the bonding agent 9 ' that is used to form engaged at end portion 9 is maintained than the high state of bonding agent 10 ' temperature that is used to form central junction surface 10, pressurization together with sheet material 50,60, but also can make the higher state of temperature that becomes the bonding agent 10 ' that is used to form central junction surface 10 pressurize.By doing like this, the constant intensity that can be manufactured on efficiently linear elastic bodies 7 in central junction surface 10 uprises, the contractility of the linear elastic bodies 7 being adhesively fixed under elongation state is difficult for junction surface, end 9 to impact, linear elastic bodies 7 is difficult for departing from, outward appearance is also attractive in appearance, and soft Stretchable sheet 3 ' and the waist panel 3 of retractility excellence.

The Stretchable sheet producing by manufacture method of the present invention, outside the waist panel 3 of disposable diaper 1, also can be applied to physiological napkin, the disposable pants of waist portion, the pants type of waist portion, the Breeches type disposable diaper of the disposable diaper of deploying type or pants type, disposable facial film hangers portion, sweep with sheet material, binder etc.

About above-mentioned embodiment, further manufacture method and the disposable diaper of open following Stretchable sheet.

The manufacture method of a <1> continuous Stretchable sheet of manufacturing Stretchable sheet, in this Stretchable sheet, be adhesively fixed at the state between a pair of banded sheet material, linear elastic bodies being extended on the direction intersecting with the throughput direction of this band shape sheet material, width central part at Stretchable sheet has central junction surface, and have pair of end portions junction surface in the both sides of this width central part, the manufacture method of this Stretchable sheet comprises following operation:

Carry operation, use elastomer winding mechanism above-mentioned linear elastic bodies to be wound in to the conveying mechanism of this linear elastic bodies to become the mode of the state extending in the direction of intersecting with above-mentioned throughput direction, utilize this conveying mechanism that this linear elastic bodies of coiling is carried on above-mentioned throughput direction;

In the adhesive applicating operation of one or both adhesive-applying of a pair of above-mentioned banded sheet material; With

Integrated operation, converges a pair of above-mentioned banded sheet material after above-mentioned adhesive applicating operation and the above-mentioned linear elastic bodies of being carried by above-mentioned conveying mechanism, to clip this linear elastic bodies a pair of this band shape sheet integral pressurize, obtain above-mentioned Stretchable sheet,

Make the engaging condition in above-mentioned integrated operation between a pair of above-mentioned banded sheet material, the bonding agent that forms use for above-mentioned central junction surface is different with the bonding agent that above-mentioned engaged at end portion forms use.

The manufacture method of the Stretchable sheet of <2> as described in above-mentioned <1>, wherein, in above-mentioned integrated operation, a pair of above-mentioned banded sheet material is imported between pair of rolls and pressurizeed, and, as a pair of this roller, employing be configured to above-mentioned central junction surface is formed use bonding agent pressurization part and above-mentioned engaged at end portion is formed to the part of the bonding agent pressurization of use, to the different parts of a pair of above-mentioned banded sheet material applied pressure.

The manufacture method of the Stretchable sheet of <3> as described in above-mentioned <2>, wherein, the pressure ratio that above-mentioned engaged at end portion is formed to the bonding agent pressurization of use the forms use pressure of bonding agent pressurization to above-mentioned central junction surface is strong.

The manufacture method of the Stretchable sheet of <4> as described in above-mentioned <2> or <3>, wherein, at least one party in a pair of above-mentioned roller, the diameter that above-mentioned engaged at end portion is formed to the part of the bonding agent pressurization of use is greater than the diameter that above-mentioned central junction surface is formed to the part of the bonding agent pressurization of use.

The manufacture method of the Stretchable sheet of <5> as described in any one in above-mentioned <2>～<4>, wherein, at least one party in a pair of above-mentioned roller is included in multiple short rollers of the width arrangement of a pair of above-mentioned banded sheet material, in multiple above-mentioned short rollers, the above-mentioned central junction surface of short roller comparison that above-mentioned engaged at end portion is formed to the bonding agent pressurization of use forms the short roller of bonding agent pressurization of use more strongly to a pair of above-mentioned banded sheet material pressurization.

The manufacture method of the Stretchable sheet of <6> as described in any one in above-mentioned <1>～<5>, wherein, in above-mentioned roller, above-mentioned engaged at end portion is formed to the radius R s and poor (Rs-Rm) that above-mentioned central junction surface formed to the radius R m of the part of the bonding agent pressurization of use of the part of the bonding agent pressurization of use, or above-mentioned engaged at end portion is formed use bonding agent pressurization part and the difference that above-mentioned central junction surface forms the gap of the part of the bonding agent pressurization of use is preferably to 0.01mm more than, more preferably below the above 1mm of 0.01mm.

The manufacture method of the Stretchable sheet of <7> as described in above-mentioned <2>, the pressure ratio of the bonding agent pressurization of wherein, above-mentioned engaged at end portion being used is for a little less than forming the pressure of bonding agent pressurization of use to above-mentioned central junction surface.

The manufacture method of the Stretchable sheet of <8> as described in above-mentioned <1>, wherein, in above-mentioned integrated operation, a pair of above-mentioned banded sheet material is imported between pair of rolls and pressurizeed, and, the time to this bonding agent pressurization from one or both above-mentioned central junction surface of coating of a pair of above-mentioned banded sheet material being formed to the bonding agent of use until between pair of rolls, and form from applying above-mentioned engaged at end portion the bonding agent of use until the asynchronism(-nization) to this bonding agent pressurization between pair of rolls.

The manufacture method of the Stretchable sheet of <9> as described in above-mentioned <8>, wherein, form from applying above-mentioned engaged at end portion the bonding agent of use until between pair of rolls the time to this bonding agent pressurization, than forming from applying above-mentioned central junction surface the bonding agent of use until short to the time of this bonding agent pressurization between pair of rolls.

The manufacture method of the Stretchable sheet of <10> as described in above-mentioned <8>, wherein, the pair of rolls of the bonding agent pressurization that above-mentioned central junction surface is used is arranged on to the pair of rolls of the bonding agent pressurization that the above-mentioned engaged at end of comparison portion uses by the position in the downstream of the throughput direction of a pair of above-mentioned banded sheet material.

The manufacture method of the Stretchable sheet of <11> as described in any one in above-mentioned <8>～<10>, wherein, form the coating position P1 of bonding agent of use from above-mentioned central junction surface to the distance (L2) that by roller, above-mentioned central junction surface is formed the position P3 of the bonding agent pressurization of use, the coating position P1 that relatively forms the bonding agent of use from above-mentioned engaged at end portion is preferably more than 1.1 to the ratio (L2/L1) that above-mentioned engaged at end portion is formed to the distance (L1) of the position P2 of the bonding agent pressurization of use by roller, more preferably more than 1.2, in addition, be preferably below 5, more preferably below 2, in addition, be preferably more than 1.1 below 5, more preferably more than 1.2 below 2.

The manufacture method of the Stretchable sheet of <12> as described in any one in above-mentioned <8>～<11>, wherein, the roller of a side in the pair of rolls of the roller of the side in the pair of rolls of the side's pressurization to above-mentioned engaged at end portion and the opposing party's pressurization to above-mentioned engaged at end portion, with the orthogonal direction of the throughput direction of banded sheet material on separate.

The manufacture method of the Stretchable sheet of <13> as described in above-mentioned <12>, wherein, the roller of the opposing party in the pair of rolls of the roller of the opposing party in the pair of rolls of the side's pressurization to above-mentioned engaged at end portion and the opposing party's pressurization to above-mentioned engaged at end portion is the tubular roller that diameter shares uniformly in the roughly whole width range of above-mentioned banded sheet material.

The manufacture method of the Stretchable sheet of <14> as described in above-mentioned <8>～<12>, wherein, the roller of a side in the pair of rolls of the roller of the side in the pair of rolls of the side's pressurization to above-mentioned engaged at end portion and the opposing party's pressurization to above-mentioned engaged at end portion is the different roller separating in the direction orthogonal from the throughput direction of banded sheet material.

The manufacture method of the Stretchable sheet of <15> as described in above-mentioned <8>, wherein, above-mentioned engaged at end portion forms the coating position of bonding agent of use and above-mentioned central junction surface and forms the coating position of the bonding agent of use, on the throughput direction of above-mentioned banded sheet material, stagger, two bonding agents are from coated until pressurized asynchronism(-nization) between roller thus.

The manufacture method of the Stretchable sheet of <16> as described in above-mentioned <8>, wherein, form from applying above-mentioned engaged at end portion the bonding agent of use until between pair of rolls the time to this bonding agent pressurization, than forming from applying above-mentioned central junction surface the bonding agent of use until long to the time of this bonding agent pressurization between pair of rolls.

The manufacture method of the Stretchable sheet of <17> as described in above-mentioned <1>, wherein, after above-mentioned adhesive applicating operation, carry out the cooling or heating of the bonding agent that the bonding agent used at above-mentioned central junction surface or above-mentioned engaged at end portion use, in above-mentioned integrated operation, to exist between a pair of above-mentioned banded sheet material by states cooling or above-mentioned two bonding agents of heating in the different state of temperature, between pair of rolls, a pair of this band shape sheet material is pressurizeed.

The manufacture method of the Stretchable sheet of <18> as described in above-mentioned <17>, wherein, in above-mentioned integrated operation, the high state of bonding agent temperature that the bonding agent of using with above-mentioned engaged at end portion is used than above-mentioned central junction surface, and a pair of this band shape sheet material one coexists and pressurizes between pair of rolls.

The manufacture method of the Stretchable sheet of <19> as described in above-mentioned <17> or <18>, wherein, on the one side of above-mentioned banded sheet material, apply bonding agent and the above-mentioned central junction surface that above-mentioned engaged at end portion forms use and form after the bonding agent of use, heat this engaged at end portion and form the bonding agent of use.

The manufacture method of the Stretchable sheet of <20> as described in any one in above-mentioned <17>～<19>, wherein, on the one side of above-mentioned banded sheet material, apply above-mentioned engaged at end portion and form after the bonding agent of use and above-mentioned central junction surface form the bonding agent of use, carry out this central authorities junction surface and form bonding agent cooling of use.

The manufacture method of the Stretchable sheet of <21> as described in above-mentioned <17>, wherein, in above-mentioned integrated operation, the high state of bonding agent temperature that the bonding agent of using with above-mentioned central junction surface is used than above-mentioned engaged at end portion, and a pair of this band shape sheet material one coexists and pressurizes between pair of rolls.

The manufacture method of the Stretchable sheet of <22> as described in any one in above-mentioned <1>～<21>, wherein, between a pair of above-mentioned banded sheet material, pass through in the engaged above-mentioned composite sheet of bonding agent, the above-mentioned linear elastic bodies of the elongation state that extends to the foreign side of this composite sheet from the lateral margin along throughput direction of this composite sheet is cut off, removed the reeling condition of this linear elastic bodies to conveying mechanism.

The manufacture method of the Stretchable sheet of <23> as described in any one in above-mentioned <1>～<22>, wherein, more than the width W 1 of above-mentioned engaged at end portion is preferably 3mm, more preferably more than 5mm, in addition, be preferably below 20mm, more preferably below 10mm, in addition, be preferably below the above 20mm of 3mm, more preferably below the above 10mm of 5mm.

The manufacture method of the Stretchable sheet of <24> as described in any one in above-mentioned <1>～<23>, wherein, more than the width W 2 at above-mentioned central junction surface is preferably 0.1mm, more preferably more than 0.5mm, in addition, be preferably below 5mm, more preferably below 1.5mm, in addition, be preferably below the above 5mm of 0.1mm, more preferably below the above 1.5mm of 0.5mm.

The manufacture method of the Stretchable sheet of <25> as described in any one in above-mentioned <1>～<24>, wherein, more than adjacent above-mentioned engaged at end portion and the interval W3 at above-mentioned central junction surface are preferably 1mm, more preferably more than 3mm, in addition, be preferably below 10mm, more preferably below 7mm, in addition, be preferably below the above 10mm of 1mm, more preferably below the above 7mm of 3mm.

The manufacture method of the Stretchable sheet of <26> as described in any one in above-mentioned <1>～<25>, wherein, above-mentioned Stretchable sheet has multiple above-mentioned central junction surfaces, more than the interval W4 at two adjacent above-mentioned central junction surfaces is preferably 1mm, more preferably more than 3mm, in addition, be preferably below 10mm, more preferably below 7mm, in addition, be preferably below the above 10mm of 1mm, more preferably below the above 7mm of 3mm.

The manufacture method of the Stretchable sheet of <27> as described in any one in above-mentioned <1>～<26>, wherein, at the interval W5 of two adjacent above-mentioned linear elastic bodies of the length direction of above-mentioned Stretchable sheet, more than being preferably 2mm, more preferably more than 4mm, in addition, be preferably below 12mm, more preferably below 10mm, in addition, be preferably below the above 12mm of 2mm, more preferably below the above 10mm of 4mm.

The manufacture method of the Stretchable sheet of <28> as described in any one in above-mentioned <1>～<27>, wherein, on the banded sheet material of the side in a pair of above-mentioned banded sheet material, apply above-mentioned engaged at end portion and form the bonding agent of use and above-mentioned central junction surface and form the bonding agent of use.

The manufacture method of the Stretchable sheet of <29> as described in any one in above-mentioned <1>～<27>, wherein, on the banded sheet material of a side in a pair of above-mentioned banded sheet material, apply the bonding agent that above-mentioned engaged at end portion forms use, on the opposing party's banded sheet material, apply above-mentioned central junction surface and form the bonding agent of use.

The manufacture method of the Stretchable sheet of <30> as described in any one in above-mentioned <1>～<29>, wherein, as above-mentioned engaged at end portion, form and compare with above-mentioned central junction surface, the adhesive strength between a pair of above-mentioned banded sheet material and the high junction surface of constant intensity of above-mentioned linear elastic bodies.

The manufacture method of the Stretchable sheet of <31> as described in any one in above-mentioned <1>～<29>, wherein, as above-mentioned engaged at end portion, form and compare with above-mentioned central junction surface, the adhesive strength between a pair of above-mentioned banded sheet material and the low junction surface of constant intensity of above-mentioned linear elastic bodies.

The manufacture method of the Stretchable sheet of <32> as described in any one in above-mentioned <1>～<31>, the method is used the device that comprises following parts to implement:

Applying device, it comprises: the conveying mechanism of above-mentioned linear elastic bodies; Above-mentioned linear elastic bodies is wound on continuously to the turning arm of the elastomer coiling use on this conveying mechanism with elongation state; Send continuously this linear elastic bodies, this linear elastic bodies is imported to the elastomer feed mechanism of this turning arm with elongation state; This linear elastic bodies after being reeled by this turning arm is transported to the conveying mechanism between a pair of above-mentioned banded sheet material; With by adhesive applicating in the applying mechanism of this band shape sheet material;

Integrated mechanism, it uses a pair of pinch roll that the above-mentioned linear elastic bodies of elongation state is fixed between a pair of above-mentioned banded sheet material;

Shut-off mechanism, it cuts off the linear elastic bodies that extends to foreign side from the both ends along throughput direction of a pair of above-mentioned banded sheet material, removes the reeling condition of linear elastic bodies with respect to conveying mechanism.

The manufacture method of the Stretchable sheet of <33> as described in above-mentioned <32>, wherein, has a side pinch roll and the opposing party's pinch roll as a pair of above-mentioned pinch roll,

One side's pinch roll uses has at the central part of its axial length direction the minor diameter part M that diameter is relatively little, and has the large-diameter portion S that diameter is relatively large, the pinch roll of S at the both ends of axial length direction,

Above-mentioned minor diameter part M forms the position pressurization of the bonding agent of use to the central junction surface that exists between the two in above-mentioned banded sheet material, and above-mentioned large-diameter portion S, S form the position pressurization of the bonding agent of use to the engaged at end portion that exists between the two in this band shape sheet material.

The manufacture method of the Stretchable sheet of <34> as described in above-mentioned <32> or <33>, wherein, have a side pinch roll and the opposing party's pinch roll as a pair of above-mentioned pinch roll, the opposing party's pinch roll diameter in the whole width range of above-mentioned banded sheet material is certain.

The manufacture method of the Stretchable sheet of <35> as described in any one in above-mentioned <1>～<34>, wherein, above-mentioned Stretchable sheet has multiple central junction surfaces at width central part.

The manufacture method of the Stretchable sheet of <36> as described in any one in above-mentioned <1>～<35>, wherein, above-mentioned Stretchable sheet only has a central junction surface at width central part.

The manufacture method of the Stretchable sheet of <37> as described in above-mentioned <36>, wherein, above-mentioned central junction surface is wider than above-mentioned engaged at end portion width separately.

The manufacture method of the Stretchable sheet of <38> as described in above-mentioned <36> or <37>, wherein, above-mentioned central junction surface is wider than the total width of a pair of above-mentioned engaged at end portion.

The manufacture method of the Stretchable sheet of <39> as described in any one in above-mentioned <1>～<38>, wherein, central junction surface and engaged at end portion are not adjacent or continuous across non-bonding region ground.

<40> disposable diaper, it comprises: have the veutro portion at the veutro of wearer while wearing, absorbent main body in the drosal part of dorsal part and the crotch between veutro portion and drosal part; Be connected the waist panel of the pair of right and left arranging with left and right two foreign sides at drosal part,

Above-mentioned waist panel is used the Stretchable sheet being obtained by the manufacture method of the Stretchable sheet described in any one in above-mentioned <1>～<39>.

Industrial utilizability

According to the manufacture method of Stretchable sheet of the present invention, bond strength between sheet material and linear elastic bodies can be formed efficiently to the constant intensity of sheet material different part mutually, the anticreep, flexibility, attractive in appearance etc. of the linear elastic bodies in Stretchable sheet can be effectively improved.For example, as Stretchable sheet, can manufacture efficiently linear elastic bodies and be difficult for departing from from engaged at end portion, and the Stretchable sheet of aeration, flexibility and retractility excellence between engaged at end portion.

Claims (15)

1. a manufacture method of manufacturing continuously the Stretchable sheet of Stretchable sheet, is characterized in that:

In described Stretchable sheet, be adhesively fixed at the state between a pair of banded sheet material, linear elastic bodies being extended on the direction intersecting with the throughput direction of this band shape sheet material, width central part at Stretchable sheet has central junction surface, and there is pair of end portions junction surface in the both sides of this width central part

The manufacture method of described Stretchable sheet comprises following operation:

Carry operation, use elastomer winding mechanism described linear elastic bodies to be wound in to the conveying mechanism of this linear elastic bodies to become the mode of the state extending in the direction of intersecting with described throughput direction, utilize this conveying mechanism that this linear elastic bodies of coiling is carried on described throughput direction;

In the adhesive applicating operation of one or both adhesive-applying of a pair of described banded sheet material; With

Integrated operation, converges a pair of described banded sheet material after described adhesive applicating operation and the described linear elastic bodies of being carried by described conveying mechanism, to clip this linear elastic bodies a pair of this band shape sheet integral pressurize, obtain described Stretchable sheet,

Make the engaging condition in described integrated operation between a pair of described banded sheet material, the bonding agent that forms use for described central junction surface is different with the bonding agent that described engaged at end portion forms use.

2. the manufacture method of Stretchable sheet as claimed in claim 1, is characterized in that:

In described integrated operation, a pair of described banded sheet material is imported between pair of rolls and pressurizeed, and, as a pair of this roller, employing be configured to described central junction surface is formed use bonding agent pressurization part and described engaged at end portion is formed to the part of the bonding agent pressurization of use, to the different parts of a pair of described banded sheet material applied pressure.

3. the manufacture method of Stretchable sheet as claimed in claim 2, is characterized in that:

The pressure ratio that described engaged at end portion is formed to the bonding agent pressurization of use the forms use pressure of bonding agent pressurization to described central junction surface is strong.

4. the manufacture method of Stretchable sheet as claimed in claim 2 or claim 3, is characterized in that:

At least one party in a pair of described roller, the diameter that described engaged at end portion is formed to the part of the bonding agent pressurization of use is greater than the diameter that described central junction surface is formed to the part of the bonding agent pressurization of use.

5. the manufacture method of the Stretchable sheet as described in any one in claim 2～4, is characterized in that:

At least one party in a pair of described roller is included in multiple short rollers of the width arrangement of a pair of described banded sheet material, in multiple described short rollers, the described central junction surface of short roller comparison that described engaged at end portion is formed to the bonding agent pressurization of use forms the short roller of bonding agent pressurization of use more strongly to a pair of described banded sheet material pressurization.

6. the manufacture method of Stretchable sheet as claimed in claim 1, is characterized in that:

In described integrated operation, a pair of described banded sheet material is imported between pair of rolls and pressurizeed, and, the time to this bonding agent pressurization from one or both described central junction surface of coating of a pair of described banded sheet material being formed to the bonding agent of use until between pair of rolls, and form from applying described engaged at end portion the bonding agent of use until the asynchronism(-nization) to this bonding agent pressurization between pair of rolls.

7. the manufacture method of Stretchable sheet as claimed in claim 6, is characterized in that:

Form from applying described engaged at end portion the bonding agent of use until between pair of rolls to the time of this bonding agent pressurization than forming from applying described central junction surface the bonding agent of use until short to the time of this bonding agent pressurization between pair of rolls.

8. the manufacture method of the Stretchable sheet as described in claim 6 or 7, is characterized in that:

The pair of rolls of the bonding agent pressurization that described central junction surface is used is arranged on to the pair of rolls of the bonding agent pressurization that the described engaged at end of comparison portion uses by the position in the downstream of the throughput direction of a pair of described banded sheet material.

9. the manufacture method of Stretchable sheet as claimed in claim 6, is characterized in that:

Described engaged at end portion forms the coating position of bonding agent of use and stagger in the coating position that described central junction surface forms the bonding agent of use on the throughput direction of described banded sheet material, makes thus two bonding agents from coated until the asynchronism(-nization) of pressurizeing between roller.

10. the manufacture method of Stretchable sheet as claimed in claim 1, is characterized in that:

After described adhesive applicating operation, carry out the cooling or heating of the bonding agent that the bonding agent used at described central junction surface or described engaged at end portion use, in described integrated operation, the state of described two bonding agents in the different state of temperature to exist between a pair of described banded sheet material by cooling or heating, between pair of rolls to a pair of this band shape sheet material pressurization.

The manufacture method of 11. Stretchable sheets as claimed in claim 10, is characterized in that:

In described integrated operation, the high state of bonding agent temperature that the bonding agent of using with described engaged at end portion is used than described central junction surface, and a pair of this band shape sheet material one coexists and pressurizes between pair of rolls.

12. the manufacture method of the Stretchable sheet as described in claim 10 or 11, is characterized in that:

On the one side of described banded sheet material, apply bonding agent and the described central junction surface that described engaged at end portion forms use and form after the bonding agent of use, heat this engaged at end portion and form the bonding agent of use.

The manufacture method of 13. Stretchable sheets as described in any one in claim 1～12, is characterized in that:

On the banded sheet material of a side in a pair of described banded sheet material, apply the bonding agent that described engaged at end portion forms use, on the opposing party's banded sheet material, apply described central junction surface and form the bonding agent of use.

The manufacture method of 14. Stretchable sheets as described in any one in claim 1～13, is characterized in that:

The method is used the device that comprises following parts to implement:

Applying device, it comprises: the conveying mechanism of described linear elastic bodies; Described linear elastic bodies is wound on continuously to the turning arm of the elastomer coiling use on this conveying mechanism with elongation state; Send continuously this linear elastic bodies, this linear elastic bodies is imported to the elastomer feed mechanism of this turning arm with elongation state; This linear elastic bodies after being reeled by this turning arm is transported to the conveying mechanism between a pair of described banded sheet material; With by adhesive applicating in the applying mechanism of this band shape sheet material;

Integrated mechanism, it uses a pair of pinch roll that the described linear elastic bodies of elongation state is fixed between a pair of described banded sheet material;

Shut-off mechanism, it cuts off the linear elastic bodies that extends to foreign side from the both ends along throughput direction of a pair of described banded sheet material, removes the reeling condition of linear elastic bodies with respect to conveying mechanism.

15. 1 kinds of disposable diapers, it comprises: have the veutro portion at the veutro of wearer while wearing, absorbent main body in the drosal part of dorsal part and the crotch between veutro portion and drosal part; The waist panel that is connected the pair of right and left arranging with left and right two foreign sides at drosal part, this disposable diaper is characterised in that:

Use in described waist panel the Stretchable sheet being obtained by the manufacture method of the Stretchable sheet described in any one in claim 1～14.

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