JP2019150404A - Tape type disposable diaper - Google Patents

Abstract

To improve fitting property to the body surface in the configuration area around the trunk of a side flap part.SOLUTION: The configuration area 70 around the trunk of the back side part B includes: an upper area 71, an intermediate area 72, and a lower area 73. The upper area 71 is a stretchable area which shrinks in a stretchable manner in the width direction WD by an upper elastic sheet 71E. The lower area 73 is a stretchable area which shrinks in a stretchable manner in the width direction WD by a lower elastic sheet 73E. The intermediate area 72 has no shrinkage in the width direction WD by possessing no elastic material or even if an elastic material is possessed, no shrinkage in the width direction occurs by the elastic material. The foregoing problem is solved by such structure of the tape type disposable diaper.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a tape-type disposable diaper.

  There are mainly three types of disposable diapers: a tape type, a pants type (see Patent Documents 5 and 6), and a pad type. Among these, the tape-type disposable diaper is worn by connecting the connecting portions provided on the left and right sides of the back portion to the outer surface of the abdominal portion after being applied to the body in the unfolded state.

  A general tape-type disposable diaper has a crotch portion including a center in the front-rear direction, a ventral portion extending forward from the center in the front-rear direction, and a back portion extending rearward from the center in the front-rear direction. The side portion has side flap portions that extend to the left and right sides of the absorbent body, and the side flap portion of the back side portion has a leg peripheral edge that extends to the side as it goes rearward, and A waistline configuration region located rearward of the edge, and a connecting means for detachably connecting to the ventral portion in the waistline configuration region of the back side portion (for example, Patent Documents 1 to 3) 4). Such a tape-type disposable diaper is used not only for infants but also widely used for nursing care (adult use).

  In such a tape-type disposable diaper, the region around the waist is a portion that hits the curved surface of the body surface (usually, the curved surface of the portion along the iliac crest), and therefore it is desirable that the fitting property with respect to the curved surface is excellent.

  However, since the conventional region around the waist is flat in the unfolded state, the contact pressure against the top of the curved surface is increased even if the stretchability in the width direction or the like is added by the elastic member to improve the fit. There is room for improvement in fit.

Japanese Patent Laid-Open No. 2006-174816 JP 2010-22550 A JP 2011-139838 A JP 2011-72736 A JP 2017-064224 A JP 2017-064225 A

  Then, the main subject of this invention is improving the fitting property with respect to the body surface of the trunk periphery area | region of a side flap part.

Various aspects of the tape-type disposable diaper that solves the above problems are as follows.
<First aspect>
Having a crotch portion including a front-rear direction center, a ventral portion extending forward from the front-rear direction center, and a dorsal side portion extending rearward from the front-rear center,
Having an absorbent body built in a range including the crotch part,
The ventral part and the dorsal part have side flaps that extend to the left and right sides of the absorber,
The side flap portion of the dorsal portion has a leg periphery that extends to the side as it goes rearward, and a waist area that is located rearward of the leg periphery,
A connecting means for detachably connecting to the abdomen part in the waist circumference configuration region of the back part;
In tape-type disposable diapers,
The waist-constituting region of the back portion has three regions, an upper region, a middle region, and a lower region,
An upper elastic sheet provided in the upper region, a lower elastic sheet provided in the lower region, and a first cover that covers a front side of the upper elastic sheet and the lower elastic sheet across the upper region, the intermediate region, and the lower region A second cover layer covering the back side of the upper elastic sheet and the lower elastic sheet over the upper region, the intermediate region and the lower region,
The lower edge of the upper elastic sheet coincides with the lower edge of the upper area, the upper edge of the lower elastic sheet coincides with the upper edge of the lower area,
The elastic sheet, the first cover layer, and the second cover layer are integrated,
The first cover layer and the second cover layer do not have elasticity,
The upper region is a stretchable region contracted so as to be stretchable in the width direction by the upper elastic sheet,
The lower region is a stretchable region contracted to be stretchable in the width direction by the lower elastic sheet,
The intermediate region does not have an elastic material or is not contracted in the width direction by the elastic material even if it has an elastic material.
A tape-type disposable diaper characterized by that.

(Function and effect)
As in this embodiment, when the upper and lower regions of the waistline constituting region having the connecting means are the stretchable regions and the intermediate region is the non-stretchable region, the middle region is recessed on the back side due to the shrinkage of the upper and lower regions. Can do. For this reason, as long as the upper region and the lower region are not expanded to the deployed state at the time of wearing, a hollow mainly composed of an intermediate region can be formed on the inner surface of the waistline component region, and the curved surface of the body surface (especially, the iliac crest It fits well to the curved surface of the curved part, and the contact pressure against the top of the curved surface is difficult to increase. Moreover, due to the stretchability of the upper region and the lower region, the stretchability in the waist circumference direction is also exhibited, and good fit is exhibited as a whole.
<Second aspect>
The absorber extends rearward at least between the lower regions;
The upper elastic sheet is a left and right common member that is continuous in the width direction from one waistline configuration region in the width direction to the other waistline configuration region,
The lower elastic sheet is individually provided in one waistline configuration region and the other waistline configuration region on both sides in the width direction,
In the region overlapping with the absorber, a portion not having the lower elastic sheet is provided,
The tape type disposable diaper of a 1st aspect.

(Function and effect)
By using the upper elastic sheet as a common member that is continuous with the left and right waistline configuration areas as in this mode, the upper elastic sheet shrinks to extend in the width direction, including not only the left and right waistline configuration areas. Therefore, the fit of the rear end (waist edge) of the tape-type disposable diaper becomes good. On the other hand, when the lower elastic sheet is separately provided in the left and right waistline configuration regions and the non-stretchable region is formed in the region overlapping the absorber, the fit of the portion having the absorber is improved.
<Third Aspect>
The connecting means includes a tape attachment portion fixed to the waistline configuration region, a tape main body portion protruding from the tape attachment portion, and a connection to the ventral portion provided in the intermediate portion in the width direction of the tape main body portion. A connecting tape having a portion,
The tape attachment portion extends from a front-rear direction position corresponding to the upper end portion of the upper region in the waistline configuration region to a front-rear direction position corresponding to the lower end portion of the lower region,
The tape type disposable diaper of the 1st or 2nd aspect.

(Function and effect)
By being comprised like this aspect, when pinching and pulling a tape main-body part, force is transmitted directly with respect to both an upper area | region and a lower area | region. As a result, at the time of mounting, the upper region and the lower region of the waistline configuration region can be pulled with good balance, and appropriate mounting can be performed more easily.
<Fourth aspect>
The intermediate region is sandwiched between the first cover layer and the second cover layer and has an integrated intermediate elastic sheet, and the first cover layer, the second cover layer, and the intermediate elastic sheet overlap each other. Having a three-dimensional deformation region in the region,
The first cover layer and the second cover layer in the three-dimensional deformation region are provided with a plurality of slit portions made of slits or perforations for forming the slit,
The plurality of slit portions extend from one edge of the three-dimensional deformation region to the other edge across the three-dimensional deformation region,
The plurality of slit portions intersect each other,
All of the portions located in the three-dimensional deformation region in the first cover layer and the second cover layer are continuous to the portion located outside the three-dimensional deformation region without passing through the slit portion.
A tape type disposable diaper according to any one of the first to third aspects.

(Function and effect)
The intermediate region of this aspect is accompanied by deformation of the first cover layer and the second cover layer so that the multiple slit portions expand as the crossing positions thereof approach each other, and the intermediate elastic sheet corresponds to the extension of each slit portion. Elastically stretchable. As a result, when a force directed from one side of the thickness direction to the other side is applied to the three-dimensional deformation region, the three-dimensional deformation region follows this and extends mainly in a plurality of directions orthogonal to each slit portion. , It can be deformed so as to be recessed with respect to the surrounding portion. Therefore, if such a three-dimensional deformation region that deforms into a depression is provided in the middle region of the waistline configuration region, the upper region and the lower region of the waistline configuration region extend to a certain extent, and the recesses in the waistline configuration region are almost all. Even in a wearing state where it disappears, a good fit is ensured by the depression of the three-dimensional deformation region.
In addition, since the three-dimensional deformation region is determined by the plurality of slit portions, there is no restriction in the expansion / contraction direction and the degree of expansion / contraction can be increased as compared with the case of a single linear slit.
Furthermore, since all of the portions located in the three-dimensional deformation region in the first cover layer and the second cover layer are continuous to the portion located outside the three-dimensional deformation region without passing through the slit portion, In the manufacturing facility, the first cover layer and the second cover layer can be manufactured simply by providing slit portions.

<Fifth aspect>
In the three-dimensional deformation region, in a natural length state, a shrinkage crease formed along with the shrinkage of the intermediate elastic sheet is not formed in the first cover layer and the second cover layer.
The tape type disposable diaper of a 4th aspect.

(Function and effect)
In the case of forming a three-dimensional deformation region by the slit portion, the intermediate elastic sheet may be attached in a stretched state at the time of manufacture, but this is not necessary. Therefore, by integrating the intermediate elastic sheet with the first cover layer and the second cover layer in a state in which the intermediate elastic sheet is not substantially stretched at the time of manufacture, wrinkles (including wrinkles) due to the contraction of the intermediate elastic sheet are formed as in this aspect. Therefore, the elastic structure has a good appearance. In this case, by providing only the slit portions in the first cover layer and the second cover layer, there is an advantage that the intermediate elastic sheet is clearly hidden by the first cover layer and the second cover layer in the natural length state.

<Sixth aspect>
The slit portion includes a plurality of slit portions that pass through a central portion of the three-dimensional deformation region and both end portions extend to an edge of the three-dimensional deformation region.
The tape type disposable diaper of the aspect of 4th or 5th.

(Function and effect)
As in this embodiment, the slit portion can include a plurality of slit portions that pass through the central portion. In this case, the slit portion extends radially (including an X shape and a cross shape) from the central portion of the three-dimensional deformation region. In this aspect, a wide range of three-dimensional deformation regions can be formed with the minimum number of slit portions. This aspect is suitable when the three-dimensional deformation region is a circle, an ellipse, or a rhombus.

<Seventh aspect>
The slit portion passes through a central portion of the three-dimensional deformation region, both end portions extend to the edge of the three-dimensional deformation region, and both ends pass through the end portion of the central slit portion. Including an end slit extending to the edge of the deformation region,
The tape type disposable diaper of the aspect of 4th or 5th.

(Function and effect)
Like this aspect, the center slit part and the end slit part which passes the edge part can be included. In this case, the slit portion extends in a T shape, an H shape, or the like. This aspect is suitable when the three-dimensional deformation region is a triangle or a rectangle.

  As described above, according to the present invention, there are advantages such that the region around the waist of the side flap portion fits well with the curved surface of the body surface.

It is a top view in the state where the diaper was developed showing the inner surface of a tape type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a tape type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 1. (A) 8-8 sectional view taken on the line of FIG. 1, (b) 9-9 sectional view taken on the line of FIG. (A) Sectional view taken along line 3-3 in FIG. 1, (b) Sectional view taken along line 4-4 in FIG. 1, and (c) Sectional view taken along line 5-5 in FIG. It is the (a) top view in a deployment state of a layered elastic body, (b) a transverse section, and (c) a longitudinal section. (A) The top view which shows the trunk periphery structure area | region in the unfolding state, (b) The perspective view which shows the trunk periphery structure area | region in the state of natural length. It is a side view which shows a mounting state. It is a top view which shows the example of various arrangement | positioning of an expansion-contraction area | region. It is a top view which shows various slit parts. It is (a) perspective view which shows the deformation | transformation state of an expansion-contraction area | region, and (b) sectional drawing.

  1-9 has shown an example of the tape type disposable diaper, the code | symbol X in a figure has shown the full width of the diaper except a connection tape, the code | symbol L has shown the full length of the diaper, and it is in sectional drawing. The dotted pattern portion indicates a hot melt adhesive as a joining means for joining the constituent members located on the front side and the back side. Hot melt adhesives can be applied by known methods such as slot coating, continuous line or dotted line bead coating, spiral coating, Z coating, etc., or pattern coating (transfer of hot melt adhesive in relief printing). Can be applied. Instead of or together with this, at the fixing portion of the elastic member, the hot melt adhesive can be applied to the outer peripheral surface of the elastic member, and the elastic member can be fixed to the adjacent member. Examples of hot melt adhesives include EVA, adhesive rubber (elastomer), olefin, and polyester / polyamide types, which can be used without any particular limitation. As a joining means for joining the constituent members, means by material welding such as heat sealing or ultrasonic sealing can be used.

  This tape-type disposable diaper has a crotch part including the center of the front-rear direction LD, a ventral part F extending forward from the center of the front-rear direction LD, and a back part B extending rearward from the center of the front-rear direction LD. is doing. Further, this tape-type disposable diaper includes an absorbent body 56 built in a range including the crotch portion, a liquid-permeable top sheet 30 that covers the front side of the absorbent body 56, and a liquid-impermeable material that covers the back side of the absorbent body 56. It has the sheet | seat 11 and the exterior nonwoven fabric 12 which covers the back side of a liquid-impermeable sheet | seat and comprises the product outer surface. On the other hand, side flap portions SF that do not have the absorber 56 are formed on both sides in the width direction from the ventral portion F to the back portion B, and the side flap portions of the dorsal portion are laterally extended toward the rear. The leg periphery edge 10 extends so as to be located at a position, and the waist periphery component region 70 is located behind the leg periphery edge 10. And the trunk periphery structure area | region 70 of the back part B has the connection tape 13 connected with the outer surface of the abdominal part F so that attachment or detachment is possible. In the mounted state, for example, as shown in FIG. 9, the connecting tape 13 is connected to the outer surface of the ventral portion F. As shown in FIG. 2 and the like, the side flap portion of the ventral portion F also has a leg periphery 10 that extends to the side as it goes forward, and a waist that is located behind the leg periphery 10. It has a configuration area 70. The leg peripheral edge 10 of the ventral part F and the back part B is continuous, and has a constricted middle in the front-rear direction LD of the tape-type disposable diaper. Moreover, the tape-type disposable diaper of the example of illustration has a pair of end flap part EF which does not have the absorber 56 extended to the front side and back side of the absorber 56, respectively.

Hereinafter, the material and the characteristic part of each part are demonstrated in order.
(Absorber)
The absorber 56 is a part that absorbs and retains excretory fluid, and can be formed of a fiber assembly. As this fiber assembly, a filament assembly obtained by opening, as necessary, synthetic fiber tows (fiber bundles) such as cellulose acetate as well as short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber basis weight can be set to, for example, about 100 to 300 g / m ² when cotton-like pulp or short fibers are stacked, and in the case of a filament aggregate, for example, about 30 to 120 g / m ^2. Can do. The fineness in the case of a synthetic fiber is 1-16 dtex, for example, Preferably it is 1-10 dtex, More preferably, it is 1-5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The degree of crimp of the crimped fibers can be, for example, about 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per 2.54 cm. Moreover, the crimped fiber crimped uniformly can be used.

(Superabsorbent polymer particles)
The absorber 56 can contain superabsorbent polymer particles in a part or all thereof. Superabsorbent polymer particles include “powder” in addition to “particles”. As the superabsorbent polymer particles 54, those used in this type of absorbent article can be used as they are. The particle size of the superabsorbent polymer particles is not particularly limited, but for example, screening using a standard sieve (JIS Z8801-1: 2006) of 500 μm (shaking for 5 minutes), and particles falling under the screen by this screening When sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1: 2006), the proportion of particles remaining on the 500 μm standard sieve is 30% by weight or less, and the 180 μm standard sieve It is desirable that the proportion of particles remaining on the surface is 60% by weight or more.

  The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. High-absorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and sodium carboxymethylcellulose crosslinks. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.

  As the superabsorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption speed is too slow, the liquid supplied into the absorber 56 is likely to cause a so-called reverse return that returns to the outside of the absorber 56.

  Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even if it is a case where it is set as the bulky absorber 56, the sticky feeling after liquid absorption can be suppressed effectively.

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . If the amount of polymer is less than 50 g / m ^2, it is difficult to secure the absorption amount. When it exceeds 350 g / m ² , not only the effect is saturated, but also the sensation of incongruity due to the excess of the superabsorbent polymer particles is given.

(Packaging sheet)
In order to prevent the superabsorbent polymer particles from slipping out or to improve the shape maintaining property of the absorbent body 56, the absorbent body 56 can be incorporated as an absorbent element 50 that is wrapped with a packaging sheet 58. As the packaging sheet 58, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet having small holes, and the like can be used. However, it is desirable that the superabsorbent polymer particles be a sheet that does not escape. When a nonwoven fabric is used instead of the crepe paper, a hydrophilic SMMS (spunbond / meltblown / meltblown / spunbond) nonwoven fabric is particularly suitable, and polypropylene, polyethylene / polypropylene, etc. can be used as the material. The fiber basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  As shown in FIGS. 3 and 5, the packaging sheet 58 has a structure in which the entire absorbent body 56 is wrapped by one sheet, and the entire absorbent body 56 is wrapped by a plurality of upper and lower sheets. A good packaging sheet 58 can also be omitted.

(Top sheet)
The top sheet 30 has liquid permeability, and for example, a porous or non-porous nonwoven fabric or a porous plastic sheet can be used. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is for obtaining bulkiness and softness.

  The top sheet 30 extends from the front end to the rear end of the product in the front-rear direction, and extends laterally from the absorber 56 in the width direction WD. For example, the starting point of a rising gather 60 described later is more than the side edge of the absorber 56. Appropriate modifications such as making the width of the top sheet 30 shorter than the entire width of the absorbent body 56 are possible as necessary, such as when located on the center side in the width direction.

(Intermediate sheet)
An intermediate sheet (also referred to as “second sheet”) 40 having a higher liquid permeation rate than the top sheet 30 can be provided in order to quickly transfer the liquid that has permeated through the top sheet 30 to the absorber. The intermediate sheet 40 is for quickly transferring the liquid to the absorber to enhance the absorption performance by the absorber and preventing the “returning” phenomenon of the absorbed liquid from the absorber. The intermediate sheet 40 can be omitted.

Examples of the intermediate sheet 40 include the same material as the top sheet 30, spunlace nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond nonwoven fabric, or crepe paper. In particular, an air-through nonwoven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably ^{17~80g / m 2, 25~60g / m} 2 is more preferable. The thickness of the raw fiber of the nonwoven fabric is preferably 2.0 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use an eccentric fiber, a hollow fiber, or an eccentric and hollow fiber that does not have a core at the center as the mixed fiber of all or part of the raw fiber.

  The intermediate sheet 40 in the illustrated example is disposed in the center shorter than the width of the absorber 56, but may be provided over the entire width. In addition, the intermediate sheet 40 may be provided over the entire length of the diaper, but may be provided only in the intermediate part including the excretion position as illustrated.

(Liquid impervious sheet)
The liquid-impermeable sheet 11 is not particularly limited, but preferably has moisture permeability. As the liquid-impermeable sheet 11, for example, a microporous material obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching in a uniaxial or biaxial direction. A sheet can be suitably used. Moreover, as the liquid-impermeable sheet 11, the thing which improved the waterproofness by using a nonwoven fabric as a base material can also be used.

  The liquid-impermeable sheet 11 desirably extends over the same or a wider range than the absorber 56 in the front-rear direction LD and the width direction WD, but when other water-blocking means is present, A structure in which the end of the absorber 56 is not covered in the front-rear direction LD and the width direction WD may be employed.

(Exterior nonwoven fabric)
The exterior nonwoven fabric 12 covers the entire back side of the liquid-impermeable sheet 11 and makes the outer surface of the product look like a cloth. The exterior nonwoven fabric 12 is not particularly limited, and examples of the material fiber include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton. As a processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, or the like can be used. However, a long-fiber nonwoven fabric such as a spunbond nonwoven fabric, an SMS nonwoven fabric, or an SMMS nonwoven fabric is preferable in that both the touch and strength can be achieved. In addition to using a single nonwoven fabric, a plurality of nonwoven fabrics can be used. In the latter case, the nonwoven fabrics are preferably bonded to each other with a hot melt adhesive or the like. When using a nonwoven fabric, the fabric weight is preferably 10 to 50 g / m ² , particularly 15 to 30 g / m ² .

(Get up gather)
In order to prevent excrement that travels in the lateral direction along the top sheet 30 and to prevent so-called lateral leakage, rising gathers 60 that rise on the skin side of the wearer are provided on both sides of the surface width direction WD. It is preferable. Of course, the rising gather 60 can be omitted.

  When the rising gather 60 is employed, the structure is not particularly limited, and any known structure can be employed. The rising gather 60 in the illustrated example includes a gather sheet 62 that is substantially continuous in the width direction WD, and an elongated gather elastic member 63 that is fixed to the gather sheet 62 in a stretched state along the front-rear direction LD. ing. As the gather sheet 62, a water-repellent nonwoven fabric can be used, and as the gather elastic member 63, thread rubber or the like can be used. As shown in FIGS. 1 and 2, a plurality of elastic members can be provided, and one elastic member can be provided.

  The inner surface of the gather sheet 62 has a joining start end in the width direction WD on the side portion of the top sheet 30, and a portion on the outer side in the width direction from the joining start end is an inner surface of each side flap portion SF, that is, liquid impermeable in the illustrated example. Bonded to the side portion of the adhesive sheet 11 and the side portion of the exterior nonwoven fabric 12 positioned on the outer side in the width direction by a hot melt adhesive or the like.

  Around the legs, the inner side in the width direction from the joining start end of the gathering 60 is fixed on the top sheet 30 at both ends in the longitudinal direction of the product, but the portion between them is an unfixed free part, and this free part is The elastic member 63 rises due to the contraction force and comes into close contact with the body surface.

(Plane gathering)
A side elastic member 64 made of an elongated elastic member such as a rubber thread is fixed to each side flap portion SF in a state of extending along the front-rear direction LD, and thereby a leg-around portion of each side flap portion SF. Are configured as planar gathers. As shown in the illustrated example, the leg-around elastic member 64 is provided between the gather sheet 62 and the liquid-impermeable sheet 11 on the outer side in the width direction in the vicinity of the joining start end of the joining portion of the gather sheet 62, and also includes a side flap portion. It can also be provided between the liquid-impermeable sheet 11 and the exterior nonwoven fabric 12 in the SF. In addition to providing a plurality of leg-around elastic members 64 on each side as in the illustrated example, only one leg elastic member 64 can be provided on each side.

(Connecting tape)
A connecting tape 13 as a connecting means that is detachably connected to the outer surface of the abdominal part F is provided in the waist circumference region 70 in the back part B. When the diaper is mounted, the connecting tape 13 is turned from both sides of the waist to the outer surface of the abdominal portion F, and the connecting portion 13A of the connecting tape 13 is connected to the appropriate position on the outer surface of the abdominal portion F.

  Although the structure of the connecting tape 13 is not particularly limited, in the illustrated example, a tape base portion 13C that is fixed to the waistline constituting region 70, a tape main body portion 13B that protrudes from the tape mounting portion 13C, and this It has a connecting portion 13A for the abdominal side provided at the intermediate portion in the width direction of the tape main body portion 13B in the sheet base material, and the tip side is a knob portion from this connecting portion 13A. The shape of the connecting tape 13 is not particularly limited. For example, the tape attachment portion 13C has the longest longitudinal dimension and a constant portion, and the tape main body portion 13B can have a tapered shape that becomes thinner toward the tip. Further, the front-rear direction dimension of the tape attachment portion 13C is preferably 50 to 90% of the front-rear direction dimension of the waistline configuration region, and the front-rear direction from the upper edge of the upper elastic sheet 71E described later to the lower edge of the lower elastic sheet 73E. It is preferable that it is more than a direction dimension.

  As connection part 13A, you may provide an adhesive layer other than providing the hook material (male material) of a mechanical fastener (surface fastener). The hook material has a large number of engaging protrusions on its connecting surface, and the engaging protrusions are (A) letter-shaped, (B) J-shaped, (C) mushroom-shaped, (D) There are T-shape, (E) double J-shape (shape in which J-shape is joined back to back), etc., but any shape may be used.

Moreover, as a sheet | seat base material which forms from 13 C of tape attaching parts to the tape main-body part 13B, although a nonwoven fabric, a plastic film, a polylaminated nonwoven fabric, paper, and these composite materials can be used, the fineness of 1.0-3.5 dtex A spunbonded nonwoven fabric, an air-through nonwoven fabric, or a spunlace nonwoven fabric having a basis weight of 20 to 100 g / m ² and a thickness of 1 mm or less is preferred.

(Target part)
It is preferable to provide a target portion at a connection location of the connection tape 13 in the ventral portion F. A target part can be provided by sticking the target sheet | seat 20 for making a connection easy like the example of illustration to the outer surface of the ventral | abdominal part F. FIG. When the connecting portion 13A is a hook material, the target sheet 20 can be one in which a large number of loop yarns are formed on the surface of a sheet base material made of a plastic film or a nonwoven fabric so that the engagement protrusions of the hook material are entangled. Moreover, in the case of an adhesive material layer, the surface of a sheet substrate made of a plastic film having a smooth surface that is rich in adhesiveness can be used. Moreover, when the connection location of the connection tape 13 in the abdominal part F consists of a nonwoven fabric, for example, when it has the exterior nonwoven fabric 12 like the example of illustration, the target sheet | seat 20 is abbreviate | omitted and a hook material is used for the fiber of the exterior nonwoven fabric 12. It can also be entangled and connected. In this case, in addition to providing the target sheet 20 as a mark between the exterior nonwoven fabric 12 and the liquid impermeable sheet 11, the mark may be printed on the outer surface of the exterior nonwoven fabric 12 or the liquid impermeable sheet 11.

(Back waist part area)
Characteristically, as shown in an enlarged view in FIG. 8, the waist circumference region 70 of the back portion B has three regions, an upper region 71, an intermediate region 72, and a lower region 73. Further, as shown in FIG. 6, the waistline constituting region 70 includes an upper elastic sheet 71E provided in the upper region 71, a lower elastic sheet 73E provided in the lower region 73, an upper region 71, an intermediate region 72, and A first cover layer 91 covering the upper elastic sheet 71E and the lower elastic sheet 73E over the lower area 73, and the upper elastic sheet 71E and the lower elastic sheet 73E over the upper area 71, the intermediate area 72 and the lower area 73 And a second cover layer 92 that covers the second cover layer 92. In the illustrated example, the materials and the number of stacked layers used as the first cover layer 91 and the second cover layer 92 differ depending on the region of the waistline constituting region 70, but the same may be used, and the number of stacked layers may be one layer. (In the portion where the number of laminated layers is the smallest in the illustrated example, the first cover layer 91 is made of only the gather sheet 62 and the second cover layer 92 is made of only the exterior nonwoven fabric 12). Furthermore, as long as the 1st cover layer 91 and the 2nd cover layer 92 do not have a stretching property, what has a stretching property may be contained in the sheet | seat contained there, but both sides are formed with a nonwoven fabric It is preferable that Note that the term “not having stretchability (non-stretching)” means that the stretching magnification at the elastic limit is 1.0 to 1.3 times in all directions orthogonal to the thickness direction.

  As the upper elastic sheet 71E and the lower elastic sheet 73E, a material that elastically expands and contracts itself such as an elastic (elastic) film or an elastic nonwoven fabric can be used, as shown in FIG. The support layer 81 is bonded with an adhesive such as a hot melt adhesive, and a porous sheet-like, net-like, elongated (thread-like or string-like) elastic member 82 is provided between the support layers 81 in the width direction WD. It is also possible to use a laminated stretchable body 80 that is fixed in a state of being stretched along. In this case, as the material of the support layer 81, the same material as the exterior nonwoven fabric 12 can be used. The elongation rate of the elastic member 82 is preferably about 150 to 250%. In addition, when an elongated member (thread-like or string-like) is used as the elastic member 82, it is preferable to provide about 5 to 15 pieces having a thickness of 420 to 1120 dtex with an interval 82d of 3 to 10 mm.

  Both ends of the laminated stretchable body in the width direction WD may be non-stretchable regions 86 in order to hold and attach by suction during manufacturing. Although the dimension of the non-stretchable region 86 and the dimension of the intermediate stretchable region 85 that is located between them and stretches in the width direction WD can be appropriately determined, the width of the intermediate stretchable region 85 is determined by the left and right connecting tapes 13 described later. The width between the connecting portions 13A is preferably 45 to 90%, and the width of the non-stretchable region 86 is preferably about 5 to 50 mm in order to prevent shrinkage or turning-up during manufacturing. The non-stretchable region 86 may be a region that does not have the elastic member 82. However, the non-stretchable region 86 is not stretched by attaching the elastic member 82 over the intermediate stretchable region 85 and the non-stretchable region 86 and cutting the elastic member 82 in the non-stretchable region 86. Although the elastic member 82 remains in the region 86, the structure may be such that little or no expansion or contraction occurs.

  Moreover, as the upper elastic sheet 71E and the lower elastic sheet 73E, in addition to a non-porous sheet, a sheet in which a large number of holes and slits are formed for ventilation can be used. The upper elastic sheet 71E and the lower elastic sheet 73E are not limited by characteristics. For example, the tensile strength in the width direction WD (stretching direction ED, MD direction) is 8 to 25 N / 35 mm, and the front-rear direction LD (stretching direction and It is preferable to use one having a tensile strength of 5 to 20 N / 35 mm in the orthogonal direction XD and CD direction, a tensile elongation of 450 to 1050% in the width direction WD, and a tensile elongation of 450 to 1400% in the front-rear direction LD. it can. Although the thickness of the upper elastic sheet 71E and the lower elastic sheet 73E is not specifically limited, In the case of an elastic film, it can be about 20-40 micrometers, for example.

  The upper elastic sheet 71E and the lower elastic sheet 73E and the first cover layer 91, and the upper elastic sheet 71E and the lower elastic sheet 73E and the second cover layer 92 are bonded to each other via a hot melt adhesive, or at least one of them. Can be integrated by welding. Further, as long as the first cover layer 91, the upper elastic sheet 71E and the lower elastic sheet 73E, and the second cover layer 92 can be expanded and contracted as a whole, even if the entire adjacent layers are continuously joined, It may be joined intermittently. Further, an integrated method disclosed in JP-T-2004-532758 or JP-A-2006-189826 is adopted, and the upper elastic sheet 71E and the lower elastic sheet are interposed between the first cover layer 91 and the second cover layer 92. Ultrasonic sealing is performed in the form of dots in a state where 73E is sandwiched, and the first cover layer 91 and the second cover layer 92 are joined through through holes formed in the upper elastic sheet 71E and the lower elastic sheet 73E at a number of joining portions. (Not shown).

  In the main body periphery region 70, the lower edge of the upper elastic sheet 71E coincides with the lower edge of the upper region 71, and the upper edge of the lower elastic sheet 73E coincides with the upper edge of the lower region 73. Further, the upper region 71 is a stretchable region contracted to be stretchable in the width direction WD by the upper elastic sheet 71E, and the lower region 73 is a stretchable region contracted to be stretchable in the width direction WD by the lower elastic sheet 73E. The intermediate region 72 does not have an elastic material, or even if it has an elastic material, it is a region that is not contracted in the width direction WD by the elastic material. The upper area 71 and the lower area 73 are manufactured by a known method in which the upper elastic sheet 71E and the lower elastic sheet 73E are integrated with the first cover layer 91 and the second cover layer 92 in a state where the upper elastic sheet 71E and the lower elastic sheet 73E are extended in the width direction WD. it can. As described above, if the upper region 71 and the lower region 73 of the waistline constituting region 70 are the stretchable region and the intermediate region 72 is the non-stretchable region, as shown in FIG. 8B, the upper region 71 and the lower region 73 The intermediate region 72 can be recessed on the back side by the contraction (the recess 72S). Therefore, unless the upper region 71 and the lower region 73 are extended to the unfolded state at the time of mounting, as shown in FIG. 9, a recess 72S mainly including the intermediate region 72 can be formed on the inner surface of the waistline constituting region 70. It fits well to the curved surface of the body surface (particularly, the curved surface along the iliac crest), and the contact pressure against the top of the curved surface is difficult to increase. In addition, due to the stretchability of the upper region 71 and the lower region 73, the stretchability in the trunk periphery direction is also exhibited, and good fit is exhibited as a whole.

  As shown in FIG. 2 and the like, the upper elastic sheet 71E is a left-right common member that is continuous in the width direction WD from one waistline constituting region 70 in the width direction WD to the other waistline constituting region 70. The sheet 73E is individually provided in one waistline constituting region 70 and the other waistline constituting region 70 on both sides in the width direction WD, and a portion not having the lower elastic sheet 73E is provided in a region overlapping with the absorber 56. Preferably. In this way, by using the upper elastic sheet 71E as a common member that is continuous with the left and right waistline configuration regions 70, not only the waistline configuration region 70 but also the portion in between contracts to be extensible in the width direction WD. Therefore, the fit of the rear end (waist edge) of the tape-type disposable diaper becomes good. On the other hand, when the lower elastic sheet 73E is individually provided in the left and right waistline constituting regions 70 and a non-stretchable region is formed in a region overlapping the absorber 56, the fit property of the portion having the absorber 56 is improved. In the illustrated example, the upper elastic sheet 71E is located only in the end flap portion EF, but is disposed so as to extend from the end flap portion EF to the rear end portion of the absorber 56 as in a waist elastic sheet 75 described later. It is preferable because the rear end portion of the absorbent body 56 is firmly pressed against the body. Thus, in the width direction WD, the upper elastic sheet 71E may extend to the outside of the upper region 71, and the lower elastic sheet 73E may extend to the outside of the lower region 73.

  Of course, as shown in FIG. 10A, both the upper elastic sheet 71E and the lower elastic sheet 73E can be individually provided in the left and right waistline constituting regions 70. In this case, as shown in FIG. 10 (b), a separate waist elastic sheet 75 is disposed between the left and right upper elastic sheets 71E and the lower elastic sheet 73E, and not only the waistline constituting region 70 but also between them. The shrinkability of the tape-type disposable diaper's rear end (waist edge) can also be ensured by contracting it so as to extend in the width direction WD including the portion. The waist elastic sheet 75 may be located only in the end flap portion EF. However, when the waist elastic sheet 75 is disposed so as to extend from the end flap portion EF to the rear end portion of the absorber 56 as illustrated, the absorber 56. This is preferable because the rear end is firmly pressed against the body.

  In the illustrated example, the portion of the upper elastic sheet 71E that overlaps the absorber 56 and the portion of the waist elastic sheet 75 that overlaps the absorber 56 are disposed between the liquid-impermeable sheet 11 and the absorbent element 50. The arrangement is not particularly limited. For example, a portion of the upper elastic sheet 71 </ b> E that overlaps with the absorber 56 and a portion of the waist elastic sheet 75 that overlaps with the absorber 56 may be disposed between the liquid-impermeable sheet 11 and the exterior nonwoven fabric 12.

  The positional relationship between the upper elastic sheet 71E, the lower elastic sheet 73E, and the connecting tape 13 can be determined as appropriate. Like the illustrated example, the tape attachment portion 13C extends from the front-rear direction position corresponding to the upper end portion of the upper region 71 in the waistline configuration region 70 to the front-rear direction position corresponding to the lower end portion of the lower region 73. One preferred form. Thereby, when the tape main body 13B is picked and pulled, the force is directly transmitted to both the upper region 71 and the lower region 73. As a result, at the time of mounting, the upper region 71 and the lower region 73 of the waistline configuration region 70 can be pulled with good balance, and appropriate mounting can be performed more easily. From the same point of view, it is preferable that the center of the tape mounting portion 13C in the front-rear direction LD coincides with the center of the intermediate region 72 in the front-rear direction LD as in the illustrated example.

  The upper elastic sheet 71E and the lower elastic sheet 73E may overlap with the tape mounting portion 13C of the connecting tape 13, but when arranged on the inner side in the width direction WD without overlapping, the tape mounting portion of the connecting tape 13 13C is preferable because it does not shrink unnecessarily.

  The dimensions of the upper region 71, the lower region 73, and the intermediate region 72 can be determined as appropriate. For example, the front-rear dimension of the upper region 71 can be 15 to 30% of the front-rear dimension of the waistline configuration region 70, and the front-rear direction dimension of the lower region 73 is 15 to 15% of the front-rear dimension of the waistline configuration region 70. The front-rear direction dimension of the intermediate region 72 can be 30 to 60% of the front-rear direction dimension of the waistline component region 70.

(Three-dimensional deformation region)
As shown in FIGS. 1, 6, and 8, a three-dimensional deformation region 90 is provided in the intermediate region 72. That is, in the three-dimensional deformation region 90, an intermediate elastic sheet 93 having a size extending inside and outside the three-dimensional deformation region 90, a first cover layer 91 covering the front side of the intermediate elastic sheet 93, and a second cover layer 92 covering the back side. And are integrated. The first cover layer 91 and the second cover layer 92 may be formed of the same member as the upper region 71 and the lower region 73 or may be different. The materials or members that can be used for the intermediate elastic sheet 93 are the same as those of the upper elastic sheet 71E and the lower elastic sheet 73E. The intermediate elastic sheet 93 and the first cover layer 91 and the second cover layer 92 are integrated with each other by integrating the upper elastic sheet 71E and the lower elastic sheet 73E with the first cover layer 91 and the second cover layer 92. The same method can be adopted.

  The first cover layer 91 and the second cover layer 92 in the three-dimensional deformation region 90 are provided with a plurality of slit portions 95 and 96 made of slits or perforations for forming the slits. These slit portions 95 and 96 extend from one edge of the three-dimensional deformation region 90 to the other edge across the three-dimensional deformation region 90 and intersect each other. All of the portions of the first cover layer 91 and the second cover layer 92 located in the three-dimensional deformation region 90 are continuous with the portions located outside the three-dimensional deformation region 90 without the slits 95 and 96 being interposed. is doing. As a result, in the three-dimensional deformation region 90 of this example, as shown in the example shown in FIG. Along with the deformation of the cover layer 92, the intermediate elastic sheet 93 can be elastically stretched according to the spread of the slit portions 95 and 96.

  In other words, in the three-dimensional deformation area 90, when a force from one side in the thickness direction to the other side is applied to the three-dimensional deformation area 90 as indicated by an arrow in FIG. Following this, it can be deformed so as to be recessed with respect to the surrounding portion while extending mainly in a plurality of directions orthogonal to the slit portions 95 and 96. Therefore, if such a three-dimensional deformation region 90 that deforms into a depression is provided in the middle region 72 of the waistline configuration region 70, the upper region 71 and the lower region 73 of the waistline configuration region 70 extend to a certain extent. Even in a mounting state in which the depression 72S of the constituent area 70 is almost eliminated, the three-dimensional deformation area 90 is depressed, thereby ensuring good fit. In addition, since the three-dimensional deformation region 90 is determined by the plurality of slit portions 95 and 96, there is no restriction in the expansion / contraction direction and the degree of expansion / contraction is larger than in the case of a single linear slit. it can. Further, all of the portions of the first cover layer 91 and the second cover layer 92 located in the three-dimensional deformation region 90 are continuous with the portions located outside the three-dimensional deformation region 90 without the slits 95 and 96 being interposed. Therefore, it is possible to manufacture the existing cover by simply providing the slit portions 95 and 96 in the first cover layer 91 and the second cover layer 92 in existing manufacturing equipment.

  The intermediate elastic sheet 93 may be integrated with the first cover layer and the second cover layer in a stretched state at the time of manufacture. In that case, in the three-dimensional deformation region 90, the first cover layer 91 and the second cover layer 92 contract as the intermediate elastic sheet 93 contracts to the natural length, and the first cover layer 91 and the second cover layer 92 contract. A shrinkage fold is formed on the surface. Unlike this, it is possible to integrate the intermediate elastic sheet 93 with the first cover layer 91 and the second cover layer 92 in a state where the intermediate elastic sheet 93 is not substantially stretched. The illustrated example assumes this case, and in the natural length state, no wrinkles (including wrinkles) are formed in the three-dimensional deformation region 90, and the appearance is good. In particular, by providing only the slit portions 95 and 96 in the first cover layer 91 and the second cover layer 92, the intermediate elastic sheet 93 is more beautiful in the first cover layer 91 and the second cover layer 92 in the natural length state. There is also an advantage of being concealed.

  The slit portions 95 and 96 may extend not only in the front-rear direction LD and the width direction WD but also in an oblique direction. As long as the slits 95 and 96 extend to the edge across the three-dimensional deformation region 90, the slits 95 and 96 can be in a straight line shape as in the illustrated example, or in a curved shape such as an arc shape or a wavy line. The intersecting angle between the two slit portions 95 and 96 intersecting each other can be determined as appropriate depending on the size and shape of the three-dimensional deformation region 90 and the arrangement of the slit portions 95 and 96. When one side is an acute angle, the angle can be 15 degrees or more and less than 90 degrees, particularly 30 to less than 90 degrees. Although the dimension of the three-dimensional deformation | transformation area | region 90 can be defined suitably, in the normal case, the dimension Y1 in the front-back direction can be in the range of about 2 to 7 mm, and the dimension in the width direction X1 can be in the range of about 4 to 7 mm. As shown in a), the front-rear direction dimension Y1 is longer than the width-direction dimension X1, although not shown, the width-direction dimension X1 is longer than the front-rear direction dimension Y1, and although not shown, the front-rear direction dimension Y1 and the width-direction dimension X1 are Or the same. The three-dimensional deformation region 90 preferably does not include the end portion of the article at the periphery, but may include a part thereof. The number of the slit portions 95 and 96 is not limited and may be larger than the illustrated example.

  The arrangement of the plurality of slit portions 95 and 96 is not particularly limited. For example, as in each example shown in FIG. 11, some of the plurality of slit parts 95 (examples in FIG. 11A) or all (slit parts 95 in FIGS. 11B and 11C) are three-dimensionally deformed. It is preferable that both ends extend through the center of the region 90 to the edge of the three-dimensional deformation region 90. In this case, the slit portion 95 is radial (X-shaped or cross-shaped) from the center of the three-dimensional deformation region 90. In this way, when the slit portions 95 are arranged so as to extend radially from the central portion of the three-dimensional deformation region 90, a wide range of three-dimensional deformation is achieved with the minimum number of slit portions 95. The region 90 can be formed, and the arrangement of the slits 95 is suitable when the three-dimensional deformation region 90 is a circle, an ellipse, or a rhombus.

  As in the example shown in FIG. 11A, the slit portions 95 and 96 pass through the central portion of the three-dimensional deformation region 90, and the central slit portion 95 whose both ends extend to the edge of the three-dimensional deformation region 90. It is also preferable that both end portions include end slit portions 96 that extend through the end portions of the central slit portion and extend to the edge portions of the three-dimensional deformation region 90. In this case, the slit portions 95 and 96 extend in a T shape, an H shape, or the like. The arrangement of the slit portions 95 and 96 is suitable when the three-dimensional deformation region 90 is a triangle or a rectangle. As shown in FIG. 11 (d), only three or two end slit portions 96 may be provided so as to surround the three-dimensional deformation region 90 in a U shape or a V shape.

  The slit portions 95 and 96 of the first cover layer 91 and the slit portions 95 and 96 of the second cover layer 92 have the same dimensions and shape and are disposed at the same position (that is, completely overlap in the thickness direction). Although desirable, it may be slightly deviated. Further, the slit portions 95 and 96 of the first cover layer 91 and the slit portions 95 and 96 of the second cover layer 92 may have different sizes and shapes.

  The position in the width direction WD of the three-dimensional deformation region 90 in the intermediate region 72 is not particularly limited. However, when the number of material layers of the first cover layer 91 and the second cover layer 92 is one part, manufacturing is easy. Therefore, it is preferable. For this reason, in the case of this example, it is preferable that the three-dimensional deformation region 90 is provided on the inner side in the width direction than the tape attachment portion 13C of the connecting tape 13 in the side flap portion SF of the back portion B. In this case, the 1st cover layer 91 will consist only of the gather sheet 62, and the 2nd cover layer 92 will consist only of the exterior nonwoven fabric 12. FIG.

  As in the example illustrated in FIG. 10B, the three-dimensional deformation region 90 (that is, the intermediate elastic sheet 93 and the slit) may not be provided.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
"The front-rear direction" means the direction (vertical direction) indicated by the symbol LD in the figure, and "width direction" means the direction indicated by WD (left-right direction) in the figure, Are orthogonal.

  -"Developed state" means a state where the plate is flattened without contraction or slack.

  “Elongation rate” means a value when the natural length is 100%. For example, an expansion rate of 200% is synonymous with an expansion ratio of 2 times.

  -"Gel strength" is measured as follows. Artificial urine (urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion-exchanged water: 97.09 wt%) To 49.0 g, 1.0 g of a superabsorbent polymer is added and stirred with a stirrer. The produced gel is left in a constant temperature and humidity chamber of 40 ° C. × 60% RH for 3 hours and then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500, manufactured by I.techno Engineering).

・ "Weight" is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 23 ± 1 ° C., relative humidity 50 ± 2%) to a constant weight. Pre-drying refers to making a sample or test piece constant in an environment at a temperature of 100 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. From the test piece in a constant weight state, a sample plate (100 mm × 100 mm) is used to cut a sample having a size of 100 mm × 100 mm. The weight of the sample is measured, multiplied by 100, and the weight per square meter is calculated and used as the basis weight.
・ "Thickness" of the absorber is a thickness measuring instrument (Peacock, dial thickness gauge large type, model JB (measurement range 0 to 35 mm) or model K-4 (measurement range 0 to 50 mm)) manufactured by Ozaki Mfg. Co., Ltd. Measure the sample and the thickness meter horizontally.
-"Thickness" other than the above is automatically measured using an automatic thickness measuring instrument (KES-G5 handy compression measurement program) under the conditions of load: 0.098 N / cm ² and pressure area: 2 cm ² .
・ "Tensile strength" and "tensile elongation (breaking elongation)" are in accordance with JIS K7127: 1999 "Plastics-Test method for tensile properties-" except that the test piece is rectangular with a width of 35 mm and a length of 80 mm. The initial chuck interval (distance between marked lines) is 50 mm, and the tensile speed is 300 mm / min. As the tensile tester, for example, AUTOGRAPH AGS-G100N manufactured by SHIMADZU can be used.

  -"Water absorption" is measured by JIS K7223-1996 "Test method for water absorption of superabsorbent resin".

  ・ "Water absorption rate" is "Time to end point" when JIS K7224-1996 "Water absorption rate test method for superabsorbent resin" is performed using 2 g of superabsorbent polymer and 50 g of physiological saline. And

  ・ If there is no description about the environmental conditions in the test and measurement, the test and measurement shall be performed in a test room or equipment in the standard state (test location: temperature 23 ± 1 ° C, relative humidity 50 ± 2%). To do.

  -Unless otherwise specified, the dimensions of each part mean dimensions in a deployed state, not a natural length state.

  INDUSTRIAL APPLICABILITY The present invention is used for a stretchable structure in general disposable wear articles such as various disposable diapers such as pants and pad types, sanitary napkins, disposable wear articles for swimming and water play, etc. in addition to tape type disposable diapers as in the above examples. It can be done.

  DESCRIPTION OF SYMBOLS 10 ... Edge around leg, 11 ... Liquid impervious sheet, 12 ... Exterior nonwoven fabric, 13 ... Connection tape, 13A ... Connection part, 13B ... Tape body part, 13C ... Tape attachment part, 20 ... Target sheet, 30 ... Top sheet , 40 ... Intermediate sheet, 50 ... Absorbing element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Gathering sheet, 62 ... Gather sheet, 70 ... Girth circumference area, 71 ... Upper area, 71E ... Upper elastic sheet, 72 ... Intermediate region, 72S ... Depression, 73 ... Lower region, 73E ... Lower elastic sheet, 75 ... Waist elastic sheet, 80 ... Laminated elastic body, 90 ... Three-dimensional deformation region, 91 ... First cover layer, 92 ... Second cover Layer, 93 ... elastic sheet, 95, 96 ... slit part, 95 ... central slit part, 96 ... end slit part, B ... dorsal side part, F ... ventral side part, LD ... front-back direction, SF ... side face -Up part, WD ... width direction.

Claims (7)

Having a crotch portion including a front-rear direction center, a ventral portion extending frontward from the front-rear direction center, and a dorsal side portion extending rearward from the front-rear direction center,
Having an absorbent body built in a range including the crotch part,
The ventral part and the dorsal part have side flaps that extend to the left and right sides of the absorber,
The side flap portion of the dorsal portion has a leg periphery that extends to the side as it goes rearward, and a waist area that is located rearward of the leg periphery,
A connecting means for detachably connecting to the abdomen part in the waist circumference configuration region of the back part;
In tape-type disposable diapers,
The waist-constituting region of the back portion has three regions, an upper region, a middle region, and a lower region,
An upper elastic sheet provided in the upper region, a lower elastic sheet provided in the lower region, and a first cover that covers a front side of the upper elastic sheet and the lower elastic sheet across the upper region, the intermediate region, and the lower region A second cover layer covering the back side of the upper elastic sheet and the lower elastic sheet over the upper region, the intermediate region and the lower region,
The lower edge of the upper elastic sheet coincides with the lower edge of the upper area, the upper edge of the lower elastic sheet coincides with the upper edge of the lower area,
The elastic sheet, the first cover layer, and the second cover layer are integrated,
The first cover layer and the second cover layer do not have elasticity,
The upper region is a stretchable region contracted so as to be stretchable in the width direction by the upper elastic sheet,
The lower region is a stretchable region contracted to be stretchable in the width direction by the lower elastic sheet,
The intermediate region does not have an elastic material or is not contracted in the width direction by the elastic material even if it has an elastic material.
A tape-type disposable diaper characterized by that. The absorber extends rearward at least between the lower regions;
The upper elastic sheet is a left and right common member that is continuous in the width direction from one waistline configuration region in the width direction to the other waistline configuration region,
The lower elastic sheet is individually provided in one waistline configuration region and the other waistline configuration region on both sides in the width direction,
In the region overlapping with the absorber, a portion not having the lower elastic sheet is provided,
The tape-type disposable diaper according to claim 1. The connecting means includes a tape attachment portion fixed to the waistline configuration region, a tape main body portion protruding from the tape attachment portion, and a connection to the ventral portion provided in the intermediate portion in the width direction of the tape main body portion. A connecting tape having a portion,
The tape attachment portion extends from a front-rear direction position corresponding to the upper end portion of the upper region in the waistline configuration region to a front-rear direction position corresponding to the lower end portion of the lower region,
The tape-type disposable diaper according to claim 1 or 2. The intermediate region is sandwiched between the first cover layer and the second cover layer and has an integrated intermediate elastic sheet, and the first cover layer, the second cover layer, and the intermediate elastic sheet overlap each other. Having a three-dimensional deformation region in the region,
The first cover layer and the second cover layer in the three-dimensional deformation region are provided with a plurality of slit portions made of slits or perforations for forming the slit,
The plurality of slit portions extend from one edge of the three-dimensional deformation region to the other edge across the three-dimensional deformation region,
The plurality of slit portions intersect each other,
All of the portions located in the three-dimensional deformation region in the first cover layer and the second cover layer are continuous to the portion located outside the three-dimensional deformation region without passing through the slit portion.
The tape type disposable diaper of any one of Claims 1-3. In the three-dimensional deformation region, in a natural length state, a shrinkage crease formed along with the shrinkage of the intermediate elastic sheet is not formed in the first cover layer and the second cover layer.
The tape-type disposable diaper according to claim 4. The slit portion includes a plurality of slit portions that pass through a central portion of the three-dimensional deformation region and both end portions extend to an edge of the three-dimensional deformation region.
The tape-type disposable diaper according to claim 4 or 5. The slit portion passes through a central portion of the three-dimensional deformation region, both end portions extend to the edge of the three-dimensional deformation region, and both ends pass through the end portion of the central slit portion. Including an end slit extending to the edge of the deformation region,
The tape-type disposable diaper according to claim 4 or 5.

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