JP2015119922A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve rigidity of a recessed groove 22, less likely causing deformation of the recessed groove 22 caused by leg pressure during being worn, and prevent leakage.SOLUTION: An incontinence pad 1 includes an absorber 4 interposed between a liquid-permeable top sheet 3 and a backside sheet 2, and a recessed groove 22 formed at a skin contact surface side along the longitudinal direction. The incontinence pad further includes, on a skin noncontact surface side of the absorber 4, a reinforcement adhesive layer 30 to which an adhesive is planarly applied across the whole surface of an area overlapped with the recessed groove 22; and a joining adhesive layer 31 consisting of a lot of adhesive coating parts 32 and non-coating parts 33 for joining the absorber 4 to the backside sheet 2, formed at areas other than at least the reinforcement adhesive layer 30.

Description

  The present invention mainly relates to absorbent articles used for incontinence pads, sanitary napkins, cage sheets, medical pads, toiletries, disposable diapers, and the like, and grooves are formed along the longitudinal direction on the surface side. The present invention relates to an absorbent article.

  Conventionally, as the absorbent article, an absorbent body is interposed between a liquid-impermeable back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric and a liquid-permeable surface sheet such as a nonwoven fabric or a liquid-permeable plastic sheet. It has been known.

  Numerous improvements have been made to this type of absorbent article, and it is one of the means for temporary storage and urine diffusion for receiving urine that is dripped at a time, such as a light incontinence pad, in a small area and spreading it quickly. Various types have been proposed in which concave grooves are formed along the longitudinal direction on the surface side.

  For example, in the following Patent Document 1, an upper absorbent layer and a lower absorbent layer are provided from the absorbent topsheet side, the upper absorbent layer has an upper opening extending in the front-rear direction, and the lower absorbent layer is The lower opening overlaps with the upper opening and extends in the front-rear direction, and the lower opening extends forward from the front end of the upper opening and / or rearward from the rear end of the upper opening. An absorbent article is disclosed.

  Moreover, in the following patent document 2, the middle-high part located in the approximate center part of a lower layer absorber has the hollow extended in the longitudinal direction formed in the approximate center of the skin contact surface side, and makes the recess of the said mid-high part. The portion has a convex portion on the lower surface of the upper-layer absorber projecting toward the non-skin contact surface side, and a concave portion on the upper surface of the lower-layer absorber that is in contact with this, and the bottom of the recess is on the lower-layer absorber side An absorbent article is disclosed in which the upper absorbent body and the lower absorbent article are both compacted with an absorbent fiber material in the vicinity of the uneven dip.

  Furthermore, in Patent Document 3 below, the absorption layer is formed by laminating an upper absorption layer and a lower absorption layer having different areas, and the absorption layer has a step formed integrally with the topsheet and the absorption layer. A concave portion extending in the longitudinal direction of the absorbent article is formed, and the concave portion is formed at the center in the short direction of the absorbent article across the high and low portions of the step, and the concave portion is formed by absorbing the absorbent article. An absorbent article that is continuously formed without interruption at the stepped portion of the layer is disclosed.

JP 2013-17531 A Japanese Patent No. 5132264 Japanese Patent No. 5105884

  In the absorbent articles described in Patent Documents 1 to 3, by providing a concave groove in the absorbent body, body fluid that is dripped at a time is temporarily stored in the concave groove, thereby improving the absorbability of the body fluid. However, such an effect is exhibited only when the groove shape for storing body fluid in the groove is reliably maintained, and the pressure from the inner part of the base of the leg during wearing When the concave groove is crushed by adding, the effect may be remarkably reduced.

  That is, the groove is an extremely low rigidity part where the absorber is not interposed or the absorber is thinned, so that when the leg pressure is applied from both sides during mounting, the groove is easily crushed and the volume in the groove is reduced. It was easy to decrease. For this reason, the bodily fluid that has been dripped out at a stroke cannot be stored in the concave groove, and side leakage may occur.

  Accordingly, a main object of the present invention is to provide an absorbent article that enhances the rigidity of the groove, makes it difficult for the groove to deform due to leg pressure during mounting, and prevents leakage.

In order to solve the above problems, as the present invention according to claim 1, an absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and a groove is formed along the longitudinal direction on the skin contact surface side. In the formed absorbent article,
A reinforcing adhesive layer is provided on the non-skin contact surface side of the absorbent body, and a reinforcing adhesive layer coated with an adhesive in a planar shape over the entire surface of the region overlapping at least the concave groove, and the reinforcing adhesive layer An absorbent article characterized in that a bonding adhesive layer composed of a large number of adhesive application portions and non-application portions is provided in a region other than the above.

  In the invention according to claim 1, in the absorbent article in which the groove is formed along the longitudinal direction on the skin contact surface side, the absorbent article is on the non-skin contact surface side, and at least the groove A reinforcing adhesive layer coated with an adhesive is provided in the overlapping region, and a bonding adhesive layer for bonding the absorber and the back sheet is provided in a region other than the reinforcing adhesive layer. The reinforcing adhesive layer enhances rigidity by adhering two adjacent members, and also increases rigidity by drying and curing the adhesive itself. For this reason, by providing a groove, it can be reinforced without increasing the number of materials even if the absorber thickness is reduced, and the groove can be prevented from being crushed due to leg pressure during mounting. As a result, it is possible to reliably prevent leakage.

  Further, since the reinforcing adhesive layer is provided in a planar shape over the entire surface of the region overlapping with the concave groove, the rigidity of the concave groove can be further reliably increased, and deformation of the concave groove is prevented. become able to.

  The area other than the reinforcing adhesive layer is provided with the bonding adhesive layer composed of a large number of adhesive-applied portions and non-applied portions. Yes.

As the present invention according to claim 2, in the absorbent article in which an absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and a groove is formed along the longitudinal direction on the skin contact surface side. ,
Absorbing the adhesive application area and the non-application area where the adhesive is continuously applied in the width direction of the absorbent article on the non-skin contact surface side of the absorbent body, at least in the area overlapping the concave groove A reinforcing adhesive layer arranged alternately in the longitudinal direction of the article is provided, and a bonding adhesive layer composed of a large number of adhesive application portions and non-application portions is provided in a region other than the reinforcement adhesive layer. An absorbent article is provided which is characterized in that

  In the second aspect of the invention, the adhesive is continuously coated in the width direction of the absorbent article on the non-skin contact surface side of the absorbent body and at least in a region overlapping the concave groove. A reinforcing adhesive layer in which the application region and the non-application region are alternately arranged in the longitudinal direction of the absorbent article is provided. By providing a non-application area in the reinforcing adhesive layer, the sag in the groove can be reduced, while the resistance to leg pressure from both sides in the width direction is slightly reduced, but the adhesive application area is made into an absorbent article. Since it is provided continuously in the width direction, it can be effectively reinforced.

  The absorbent article according to any one of claims 1 and 2, wherein the reinforcing adhesive layer and the bonding adhesive layer are provided between the absorber and the back sheet as the present invention according to claim 3. Is provided.

  In the invention according to the third aspect, by providing the reinforcing adhesive layer and the bonding adhesive layer between the same absorber and the back sheet, the adhesive application step can be simplified.

  As the present invention according to claim 4, the reinforcing adhesive layer is provided on the non-skin contact surface side of the back sheet, and the bonding adhesive layer is provided between the absorber and the back sheet. An absorbent article according to any one of claims 1 and 2 is provided.

  In the invention described in claim 4, the reinforcing adhesive layer is provided on the non-skin contact surface side of the back sheet, so that the adhesive layer for reinforcing prevents slippage when the absorbent article is attached to the underwear. It becomes possible to also use the agent layer.

  As an aspect of the present invention according to claim 5, there is provided the absorbent article according to claim 2, wherein an area ratio of the adhesive application region to an area of the reinforcing adhesive layer is 50% or more.

  In the invention of claim 5, the reinforcing adhesive layer is formed by alternately applying an adhesive application region and an uncoated region in which the adhesive is continuously applied in the width direction of the absorbent article in the longitudinal direction of the absorbent article. When configured by arranging, the area of the adhesive application region is provided at a ratio of 50% or more with respect to the total area of the reinforcing adhesive layer. Thus, by providing the adhesive application area at a predetermined area ratio, the concave groove can be reliably reinforced, and deformation due to leg pressure during mounting can be prevented.

  As the present invention according to claim 6, the reinforcing adhesive layer has a compressive strength based on the ring crush method of JIS P 8126 of 5 N / m to 10 N / m. An absorbent article is provided.

  In the invention described in claim 6, by defining the compressive strength of the reinforcing adhesive layer within a specific numerical range, it is possible to reliably prevent deformation of the concave groove due to leg pressure from both sides in the width direction. Become.

  The present invention according to claim 7 provides the absorbent article according to any one of claims 1 to 6, wherein the bonding adhesive layer is formed by spirally applying an adhesive.

  In the invention according to the seventh aspect, by forming the bonding adhesive layer by spiral application of an adhesive, a large number of adhesive application portions and non-application portions can be easily formed.

  As an aspect of the present invention according to claim 8, the concave groove has a concave groove-shaped or slit-shaped absorbent concave portion along the longitudinal direction on the skin contact surface side where the absorbent body includes the body fluid discharge portion. 8 and any one of claims 1 to 7 provided by forming an embossed portion along the absorber recess in the absorber recess by embossing from the skin contact surface side of the liquid-permeable surface sheet. An absorbent article as described above is provided.

  In the invention of claim 8, the structure of the concave groove is specifically defined, and the absorbent body has a concave groove shape along the longitudinal direction on the skin contact surface side including the body fluid discharge portion without being compressed. Or after using what was equipped with the slit-shaped absorber recessed part, the embossed part along the said absorber recessed part inside the said absorber recessed part by embossing from the skin contact surface side of the said liquid-permeable surface sheet The groove is formed by forming In this way, by forming the absorber recesses in the absorber in advance without squeezing, the rise of the bottom surface of the absorber recesses at the time of liquid absorption is higher than that in which the polymer or pulp is densified by squeezing. Extremely small. Moreover, since the said liquid-permeable surface sheet interposes in the side surface in an absorber recessed part by the said embossed part, the expansion | swelling of the both sides in the absorber recessed part at the time of liquid absorption is also suppressed small. Accordingly, it is possible to prevent the absorbent recess from being blocked by the polymer or the pulp that has expanded during liquid absorption, thereby reducing the absorbability of the body fluid. Further, when the absorber recess is formed in a slit shape, the bottom surface of the absorber recess does not have an absorber, so that the bottom surface does not expand.

  As described above in detail, according to the present invention, the rigidity of the concave groove is increased, the deformation of the concave groove due to leg pressure during mounting is less likely to occur, and leakage can be prevented.

It is a partially broken developed view of the incontinence pad 1 according to the present invention. It is the II-II arrow directional view of FIG. It is the III-III arrow directional view of FIG. FIG. 4 is a cross-sectional view of the absorber 4. It is sectional drawing of the incontinence pad 1 which concerns on another example of a form. It is a top view by the side of the non-skin contact surface which shows the absorber 4. FIG. It is a top view by the side of the non-skin contact surface which shows the absorber 4 which concerns on another form example. It is a top view by the side of the non-skin contact surface which shows the absorber which is outside the scope of the present invention. It is sectional drawing of the incontinence pad 1 which concerns on another example of a form.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Basic configuration of incontinence pad 1]
As shown in FIGS. 1 to 3, the incontinence pad 1 according to the present invention includes a liquid-impermeable back sheet 2 made of a polyethylene sheet and the like, a liquid-permeable surface sheet 3 that quickly transmits urine, and the like. Absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between both sheets 2 and 3, and crepe paper or non-woven fabric surrounding the absorbent body in order to maintain the shape and improve the diffusibility of the absorbent body 4 And the like, a hydrophilic second sheet 6 disposed between the liquid-permeable surface sheet 3 and the absorber 4 as necessary, and a substantially side edge portion of the absorber 4 standing upright. From the side nonwoven fabrics 7 and 7 that form a pair of left and right three-dimensional gathers BS and BS provided as base ends and projecting toward the skin side in a predetermined section in the longitudinal direction so as to include at least the body fluid discharge site H Configured and said suction In the periphery of the body 4, the outer edge portion of the liquid-impervious back sheet 2 and the liquid-permeable surface sheet 3 is joined at the edge portion in the longitudinal direction by an adhesive such as hot melt or an adhesive means such as heat seal. In addition, the liquid-impervious back sheet 2 and the side nonwoven fabric 7 that extend laterally from the absorbent body 4 at the both side edges are joined by an adhesive such as hot melt or an adhesive means such as heat seal. ing.

Hereinafter, the structure of the incontinence pad 1 will be described in detail.
The liquid-impervious back sheet 2 is made of a sheet material having at least water-impervious properties such as polyethylene and polypropylene, but in addition to this, a non-woven sheet after securing a substantially liquid-impervious property through a waterproof film. (In this case, a liquid-impervious back sheet is composed of the waterproof film and the nonwoven fabric). In recent years, those having moisture permeability tend to be suitably used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used.

  Next, as the liquid-permeable surface sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Examples of the material fibers constituting the nonwoven fabric 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. A nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft.

  The absorbent body 4 is composed of, for example, absorbent fibers such as fluffy pulp and the superabsorbent polymer 8, and in the illustrated example, the planar shape is an oblong shape that is long in the longitudinal direction of the pad. The superabsorbent polymer 8 is, for example, granular powder, and is dispersed and mixed in the pulp constituting the absorber 4.

Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolved pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price. In this incontinence pad 1, since the absorbent body 4 is surrounded by the encapsulating sheet 5, the encapsulating sheet 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4 as a result. The excellent encapsulating sheet 5 quickly diffuses body fluids and prevents the urine and the like from returning. Basis weight of the ^{pulp, 100g / m 2 ~600g / m} 2, and it is preferably a ^{200g / m 2 ~500g / m 2} .

Examples of the superabsorbent polymer 8 include a cross-linked polyacrylate, a self-crosslinked polyacrylate, a saponified acrylate-vinyl acetate copolymer cross-linked product, and a cross-linked isobutylene / maleic anhydride copolymer. , A crosslinked polysulfonate, and a partially crosslinked water-swellable polymer such as polyethylene oxide and polyacrylamide. Among these, those based on acrylic acid or acrylate that are excellent in water absorption and water absorption speed are preferred. The water-absorbing polymer having the water-absorbing performance can be adjusted in water absorption (absorption capacity) and water absorption speed by adjusting the crosslinking density and the crosslinking density gradient in the production process. Basis weight of the ^{polymer, 150g / m 2 ~500g / m} 2, and it is preferably a ^{200g / m 2 ~450g / m 2} .

  The absorbent body 4 may be mixed with synthetic fibers. As the synthetic fiber, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. It may be a mixture. In addition, a composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can also be used. In the case of a hydrophobic fiber, it is desirable to use a synthetic fiber that has been surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.

  The encapsulating sheet 5 can be a paper material such as tissue or a liquid-permeable sheet such as a nonwoven fabric. In particular, it is preferable to use a nonwoven fabric that does not easily cause destruction (breaking) of materials. When using a non-woven fabric, a non-woven fabric processed by a spunbond method or an SMS method, particularly a non-woven fabric processed by an SMS method, is preferred because of its excellent balance between thinness and strength. In the encapsulating sheet 5, the hydrophilicity of the sheet is not particularly limited as long as at least the skin contact surface side (surface side) of the absorbent body 4 is not water repellent.

  The second sheet 6 only needs to be hydrophilic to body fluids. Specifically, by using recycled fibers such as rayon and cupra, natural fibers such as cotton, the material itself has hydrophilicity, or synthesis of olefins such as polyethylene or polypropylene, polyesters, polyamides, etc. The fiber which surface-treated with the hydrophilizing agent and provided the hydrophilic property can be used. Further, the second sheet 6 may have a porous film layer on the back surface side (absorber 4 side) in order to give a firmness, and a material containing pulp may be used.

  Side nonwoven fabrics 7 and 7 are provided on both sides of the surface of the incontinence pad 1 along the longitudinal direction and over the entire length of the incontinence pad 1, and the outer portions of the side nonwoven fabrics 7 and 7 extend laterally. The liquid-impermeable back sheet 2 is laterally extended, and the side nonwoven fabric 7 portion and the liquid-impermeable back sheet 2 portion that are extended to the side are formed by a hot melt adhesive or the like. Joined to form side flaps.

  As the side nonwoven fabric 7, a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of an important function. For example, if importance is placed on functions such as preventing the penetration of urine, etc. or enhancing the feeling of touch, such as SSMS, SMS, and SMMS coated with a silicon-based, paraffin-based, alkylchromic chloride-based water repellent, etc. It is desirable to use a water-repellent non-woven fabric, and if importance is attached to the absorbability of body fluids, a method of polymerizing a compound having a hydrophilic group, such as an oxidation product of polyethylene glycol, in the synthetic fiber production process, Treating with metal salt such as stannic, partially dissolving the surface to make it porous and making the synthetic fiber swell or porous by applying a metal hydroxide, etc., applying capillary action to impart hydrophilicity It is desirable to use a hydrophilic treated nonwoven fabric. As this side nonwoven fabric 7, what was formed by a proper processing method using natural fiber, synthetic fiber, regenerated fiber, etc. as a raw material can be used.

  The side nonwoven fabrics 7 and 7 are appropriately folded, and a pair of left and right inner solid gathers 10 and 10 that stand on the skin side with the position near the side edge of the absorbent body 4 as a standing base end, and the inner side relatively A pair of left and right outer three-dimensional gathers 11 standing on the skin side formed by the liquid-impervious back sheet 2 and the side nonwoven fabric 7 that are located outside the three-dimensional gather 10 and extend laterally from the absorbent body 4, 11 is a three-dimensional gather BS having a double gather structure. Note that the three-dimensional gather BS may have a single gather structure including only the inner three-dimensional gather 10 or the outer three-dimensional gather 11, or a three-dimensional gather standing up on the skin side simply by disposing the side nonwoven fabric 7. It does not have to be formed into a shape.

  The structure of the inner three-dimensional gather 10 and the outer three-dimensional gather 11 will be described in more detail. As shown in FIG. 2, the side nonwoven fabric 7 is folded back on both sides in the width direction toward the back side of the pad. In the illustrated example, one or a plurality of double sheet portions 7a and 7b are formed on the outer side, and both ends or appropriate positions in the longitudinal direction are fixed inside the double sheet portion 7a on the inner side in the width direction. One or a plurality of thread elastic elastic members 12 are arranged in the double sheet portion 7b on the outer side in the width direction, and two appropriate positions in the longitudinal direction are fixed. Of the liquid-permeable surface sheet 3, in which the base end portion of the double sheet portion 7 a on the inner side in the width direction is disposed on the side portion of the absorbent body 4. While being bonded by a hot-melt adhesive or the like, the base end portion of the double sheet portion 7b on the outer side in the width direction is hot on the side end portion of the liquid-impermeable back sheet 2 that extends to the side of the absorbent body 4. By being bonded by a melt adhesive or the like, the inner solid gathers 10 are formed on the skin side by the double sheet portion 7a on the inner side in the width direction, and the skin side is formed by the double sheet portion 7b on the outer side in the width direction. An outer three-dimensional gather 11 that stands up is formed. As shown in FIG. 3, the side nonwoven fabric 7 is not provided with the elastic elastic members 12 and 13 at both ends in the longitudinal direction of the pad, and the double sheet portion 7a on the inner side in the width direction is hot. It is joined to the absorber 4 side by a melt adhesive or the like.

[About the groove 22]
In the incontinence pad 1, a body fluid inflow groove 22 is formed along the longitudinal direction on the surface side. The concave groove 22 receives body fluid discharged on the surface of the liquid-permeable surface sheet 3, temporarily stores the body fluid, induces diffusion of the body fluid in the front-rear direction, and absorbs the body fluid into the absorber 4. This is to increase the speed and prevent side leakage.

  The concave groove 22 is formed in advance in the absorbent body 4 along the longitudinal direction of the skin contact surface side including the body fluid discharge site, without forming the concave groove-shaped or slit-shaped absorbent concave portion 20 without squeezing. By surrounding the absorbent body 4 with the encapsulating sheet 5 and laminating the liquid-permeable surface sheet 3 and the second sheet 6, by embossing from the surface side (skin contact surface side) of the liquid-permeable surface sheet 3, It is provided by forming an embossed portion 21 along the absorber recess 20 inside the absorber recess 20.

  Absorber recesses 20 are formed in the absorber 4 in advance without being compressed before the embossed portions 21 are formed. The absorbent body recess 20 is recessed from the periphery to the non-skin contact surface side (impermeable liquid back sheet 2 side) on the skin contact surface side (liquid permeable top sheet 3 side) of the absorber 4. Further, it is a non-penetrating concave groove portion having a bottom surface. Further, in place of such a non-penetrating recess groove, as shown in FIG. 5, the absorber recess 20 is arranged from the skin contact surface side of the absorber 4 to the non-skin contact surface side. You may form in the slit shape which penetrated. For example, as shown in FIG. 4, the absorbent body recess 20 is formed by (A) stacking fiber, or (B) the lower layer absorbent body 4 a formed with the thickness of the bottom of the absorber recess 20, and A portion corresponding to the absorber recess 20 is formed by a laminated structure with the upper absorber 4b opened.

  As shown in FIG. 1, the absorbent body recess 20 is formed in the pad width direction center portion corresponding to the body fluid discharge site H and only one strip in the longitudinal middle portion with respect to the absorbent body 4. However, it is also possible to form a plurality of strips separated in the pad width direction, or to form discontinuous lines separated in the pad longitudinal direction (not shown). In addition, when providing two or more absorber recessed parts 20, it is preferable to provide the said embossed part 21 with respect to each absorber recessed part 20. As shown in FIG.

  As for the planar dimensions of the absorber recess 20, the length in the pad longitudinal direction is preferably 100 to 180 mm, and the groove width (bottom groove width) is 5 to 30 mm. When the absorber recess is formed in a groove shape, the depth of the absorber recess 20 is preferably 50% or more of the thickness of the absorber 4.

The absorbent 4 portion interposed in the bottom of the absorbent recess 20 (the liquid-impermeable back sheet 2 side portion, the non-skin side portion) has a pulp basis weight of 70 g / m ^{2 to} 210 g / m ² , preferably 90g ^{/ m 2} ~190g ^/ m 2 to the well, the basis weight of the polymer is ^{60g / m 2 ~200g / m 2} , and it is preferably a ^{80g / m 2 ~180g / m 2} .

  As shown in FIG. 2, the absorbent body 4 surrounded by the encapsulating sheet 5 is embossed along the absorbent body recess 20 inside the absorbent body recess 20 by embossing from the skin contact surface side. A portion 21 is formed.

  The embossed portion 21 is a skin contact surface side of the liquid permeable surface sheet 3 in a state where the liquid permeable surface sheet 3 and, if necessary, the second sheet 6 are laminated on the skin contact surface side of the encapsulating sheet 5. The liquid-permeable surface sheet 3, the second sheet 6, and the encapsulating sheet 5 are provided integrally with each other.

  The planar dimension of the embossed part 21 may be larger or smaller than the dimension of the absorber recess 20. On the bottom surface of the embossed portion 21, a high-pressure squeezed portion squeezed deeper than the bottom surface of the peripheral concave groove 22 may be formed in an appropriate pattern.

[About adhesive layer]
In the incontinence pad 1, a reinforcing adhesive layer 30 with a hot melt adhesive is provided in an appropriate pattern on the non-skin contact surface side of the absorbent body 4 and at least in a region overlapping with the concave groove 22. An adhesive layer 31 for joining with a hot melt adhesive for joining the absorbent body 4 and the liquid-impermeable back sheet 2 is provided in a region other than the reinforcing adhesive layer 30.

  As shown in FIG. 6, the reinforcing adhesive layer 30 is formed into a hot melt adhesive in a planar shape by a known coating method such as curtain coating or slot coating over at least the entire surface of the region overlapping the concave groove 22. It is formed by applying. The reinforcing adhesive layer 30 increases rigidity by adhering two adjacent layers of members, and increases rigidity by applying and curing the applied adhesive itself. For this reason, the concave groove 22 can be reinforced without increasing the number of materials, and the concave groove 22 can be prevented from being crushed due to leg pressure during mounting. Moreover, since the volume in the concave groove for storing body fluid can be secured, leakage of body fluid can be reliably prevented. Furthermore, since it can reinforce as mentioned above without increasing the number of materials, it is not necessary to add or remodel equipment to existing manufacturing equipment, and the equipment can be easily modified.

  The reinforcing adhesive layer 30 may be provided at least in a region overlapping with the concave groove 22, but after the absorbent body recess 20 is provided in the absorbent body 4 as the concave groove 22 as in the incontinence pad 1. In what is constituted by forming the embossed part 21 smaller in the longitudinal direction and the width direction than the absorbent body recessed part 20 inside the absorbent body recessed part 20 by embossing from the skin contact surface side of the liquid-permeable surface sheet 3, Since the embossed portion 21 may be provided in a range smaller than the absorber concave portion 20, the reinforcing adhesive layer 30 is provided at least in a region overlapping the absorber concave portion 20 as shown in FIG. 6. preferable. In addition, the area | region which overlaps with the ditch | groove 22 is a range including the ditch | groove 22 by planar view shown by FIG. 1, and it is preferable to form the adhesive layer 30 for reinforcement in the range wider than the ditch | groove 22. FIG.

  As shown in FIG. 6, the reinforcing adhesive layer 30 has a substantially rectangular planar shape, and as a planar dimension, the pad longitudinal dimension L is substantially equal to or slightly before and after the pad longitudinal dimension of the absorber recess 20. The pad width dimension W is formed wider than the width dimension of the absorber recess 20. In the central part of the reinforcing adhesive layer 30, the absorber recess 20 is disposed. The width dimension W of the reinforcing adhesive layer 30 is preferably about 50 to 70 mm in accordance with the crotch width of the shorts. By forming the reinforcing adhesive layer 30 in a substantially rectangular shape, the absorber recess 20 is reinforced with a substantially uniform width in the longitudinal direction, and the occurrence of twist due to the strength of rigidity is suppressed. Forming a substantially rectangular shape means that a chamfering process in which corners of four corners are cut into an arc shape or a straight line shape may be performed.

  The thickness of the adhesive applied to the reinforcing adhesive layer 30 is 1 mm or less, preferably 0.5 mm or less, and more preferably 0 in order to ensure sufficient rigidity while not causing a feeling of strangeness when worn. .2 mm to 0.5 mm is preferable. The coating thickness of the adhesive is a thickness measured after the adhesive is applied and dried.

  As shown in FIG. 7, the reinforcing adhesive layer 30 includes a strip-shaped adhesive application region 34 in which an adhesive is continuously applied in a pad width direction on a region overlapping the concave groove 22 and a pad width direction. It is also possible to form the strip-like non-application areas 35 where the adhesive is not applied continuously in a horizontal stripe pattern alternately arranged in the pad longitudinal direction. By arranging in such a horizontal stripe shape, the adhesive application region 34 exhibits resistance to leg pressure from both sides in the pad width direction, and deformation of the concave groove 22 can be prevented. In addition, by providing the non-application area 35, air permeability to the liquid-impermeable back sheet 2 side can be secured, and stuffiness in the reinforcing adhesive layer 30 can be prevented. However, in the horizontal stripe pattern, since there is a possibility that a twist may occur when pressure is applied to the non-application area 35 depending on the mounting state, the surface shape in which the adhesive is applied over the entire surface of the reinforcing adhesive layer 30 described above. Application is desirable from the viewpoint of preventing twisting.

  By the way, although it is outside the scope of the present invention, as shown in FIG. 8, as the reinforcing adhesive layer 50, an adhesive application in which an adhesive is continuously applied in the pad longitudinal direction to a region overlapping the concave groove 22. When the region 51 and the non-application region 52 where the adhesive is not applied continuously in the longitudinal direction of the pad have a vertically striped pattern alternately arranged in the pad width direction, the leg pressure from both sides of the pad width direction Since the resistance force of the adhesive application area 51 is not sufficiently exhibited, there is a possibility that the volume in which the concave groove 22 is bent and the body fluid is stored becomes small. Therefore, when arranged in a striped pattern, it is arranged in a horizontal striped pattern as described above instead of a vertical striped pattern.

  As shown in FIG. 7, when the reinforcing adhesive layer 30 is formed in a horizontal stripe pattern, the length La in the pad longitudinal direction of each adhesive application region 34 is the pad longitudinal direction of each non-application region 35. It is formed longer than the length Lb, specifically 6 mm or more, preferably 6 mm to 60 mm, more preferably 6 mm to 30 mm. The length Lb in the pad longitudinal direction of each non-application area 35 is preferably 3 to 5 mm.

  In the reinforcing adhesive layer 30 including the adhesive application region 34 and the non-application region 35, the total area of the reinforcing adhesive layer 30 (the total area of the adhesive application region 34 and the non-application region 35) is described above. The area ratio of the adhesive application region 34 is preferably 50% or more. As a result, a sufficient resistance to leg pressure from both sides of the pad width direction during mounting can be secured. The case where the area ratio is 100% is the case of the entire surface application shown in FIG.

  The strength of the reinforcing adhesive layer 30 is preferably 5 N / m to 10 N / m in compressive strength according to JIS P 8126 paper and paperboard—compressive strength test method—ring crush method. In this test, the adhesive itself applied in a planar shape and dried was cut out with dimensions of 12.0 ± 0.1 mm, 152.4 + 0 / −2.5 mm, standing in a cylindrical shape, and when a load was applied. The compressive strength C (kN / m) was measured by the following formula. C = r / l Here, r: compressive strength (N) of the test piece, l: length (mm) of the test piece. The block (outer frame) of the test apparatus used has a diameter of 150 mm, a height of 12 mm, and a weight of 1.8 kg. Moreover, the moving speed of the movable pressure plate was constant at 10 mm / min. The distance between the lower part and the upper part of the pressure plate (distance between chucks) is 20 mm. By forming the reinforcing adhesive layer 30 in the above compressive strength range, the deformation of the concave groove 22 due to leg pressure from both sides in the width direction can be surely prevented.

  Next, the bonding adhesive layer 31 will be described. The bonding adhesive layer 31 is a structural bonding portion for bonding the absorber 4 (encapsulated sheet 5) and the liquid-impermeable back sheet 2. is there. As shown in FIGS. 6 and 7, the bonding adhesive layer 31 includes a large number of adhesive application portions 32 to which a hot melt adhesive is applied and a large number of non-application portions 33 to which no adhesive is applied. Is formed. Since a large number of the non-application portions 33 are scattered in the bonding adhesive layer 31, air permeability to the liquid-impervious back sheet 2 side can be secured and stuffiness can be prevented.

  In order to form the bonding adhesive layer 31 including the adhesive application part 32 and the non-application part 33, it is preferable to apply a hot melt adhesive in a spiral manner as shown in FIGS. In addition, a known coating method such as bead coating applied in a plurality of lines, dot coating applied in a dot shape, porous coating applied in a porous shape, spray coating applied in a mist shape, or the like may be employed. .

  As shown in FIGS. 2, 6, and 7, the reinforcing adhesive layer 30 and the bonding adhesive layer 31 are disposed between the same absorbent body 4 (encapsulating sheet 5) and the liquid-impermeable back sheet 2. Can be provided. In this case, the bonding adhesive layer 31 is provided in a region other than the reinforcing adhesive layer 30. In the illustrated example, the reinforcing adhesive layer 30 is provided at the center of the absorbent body 4, and the bonding adhesive layer 31 extends along the longitudinal direction on both sides of the absorbent body 4 and over the entire length of the absorbent body 4. The reinforcing adhesive layer 30 and the reinforcing adhesive layer 30 are provided along the longitudinal direction at the front and rear end portions of the central portion in the width direction. One line is provided in a range that does not overlap. By providing the reinforcing adhesive layer 30 and the bonding adhesive layer 31 between the same layers, the adhesive application step can be simplified. Further, by providing the reinforcing adhesive layer 30 between the absorbent body 4 and the liquid-impervious back sheet 2, the highly water-absorbing polymer interposed in the bottom of the absorbent body recess 20 causes the liquid-impervious back sheet 2 to be formed. It can be prevented from breaking.

  On the other hand, as shown in FIG. 9, the bonding adhesive layer 31 is provided between the absorbent body 4 (encapsulating sheet 5) and the liquid-impermeable back sheet 2, and the reinforcing adhesive layer 30 is not used. You may provide in the non-skin contact surface side (outer surface side) of the liquid-permeable back surface sheet 2. FIG. In this case, the reinforcing adhesive layer 30 also serves as an anti-displacement pressure-sensitive adhesive layer with respect to the underwear at the time of wearing. For this reason, since the reinforcing adhesive layer 30 can increase the rigidity of the concave groove 22 and at the same time increase the fixing strength with the undergarment, the deformation of the concave groove 22 with respect to the leg pressure from both sides in the pad width direction is further increased. Less. In this case, the bonding adhesive layer 31 may be provided in a region overlapping the reinforcing adhesive layer 30, but the region in which the reinforcing adhesive layer 30 is provided preferentially. Is defined as

  DESCRIPTION OF SYMBOLS 1 ... Incontinence pad, 2 ... Impervious back sheet, 3 ... Impervious surface sheet, 4 ... Absorber, 5 ... Encapsulated sheet, 6 ... Second sheet, 7 ... Side nonwoven fabric, 8 ... Super absorbent polymer, DESCRIPTION OF SYMBOLS 10 ... Inner three-dimensional gather, 11 ... Outer three-dimensional gather, 12.13 ... Thread-like elastic elastic member, 20 ... Absorber recessed part, 21 ... Embossed part, 22 ... Concave groove, 30 ... Reinforcing adhesive layer, 31 ... Bonding for joining Agent layer, 32 ... Adhesive application part, 33 ... Non-application part, 34 ... Adhesive application area, 35 ... Non-application area, BS ... Three-dimensional gather

Claims (8)

In the absorbent article in which an absorbent body is interposed between the liquid-permeable surface sheet and the back sheet, and a groove is formed along the longitudinal direction on the skin contact surface side,
A reinforcing adhesive layer is provided on the non-skin contact surface side of the absorbent body, and a reinforcing adhesive layer coated with an adhesive in a planar shape over the entire surface of the region overlapping at least the concave groove, and the reinforcing adhesive layer An absorbent article comprising a bonding adhesive layer comprising a large number of adhesive-applied portions and non-applied portions in a region other than the above. In the absorbent article in which an absorbent body is interposed between the liquid-permeable surface sheet and the back sheet, and a groove is formed along the longitudinal direction on the skin contact surface side,
Absorbing the adhesive application area and the non-application area where the adhesive is continuously applied in the width direction of the absorbent article on the non-skin contact surface side of the absorbent body, at least in the area overlapping the concave groove A reinforcing adhesive layer arranged alternately in the longitudinal direction of the article is provided, and a bonding adhesive layer composed of a large number of adhesive application portions and non-application portions is provided in a region other than the reinforcement adhesive layer. Absorbent article characterized by being made.   The absorbent article according to claim 1, wherein the reinforcing adhesive layer and the bonding adhesive layer are provided between the absorber and the back sheet.   The reinforcing adhesive layer is provided on the non-skin contact surface side of the back sheet, and the bonding adhesive layer is provided between the absorber and the back sheet. Absorbent article according to crab.   The absorbent article according to claim 2, wherein an area ratio of the adhesive application region with respect to an area of the reinforcing adhesive layer is 50% or more.   The absorbent article according to any one of claims 1 to 5, wherein the reinforcing adhesive layer has a compressive strength in accordance with a ring crush method of JIS P 8126 of 5 N / m to 10 N / m.   The absorbent article according to claim 1, wherein the bonding adhesive layer is formed by spirally applying an adhesive.   The concave groove is provided with a concave groove-shaped or slit-shaped absorber concave portion along the longitudinal direction on the skin contact surface side where the absorbent body includes the body fluid discharge portion, and is formed of the liquid-permeable surface sheet. The absorbent article in any one of Claims 1-7 provided by forming an embossing part along the said absorber recessed part inside the said absorber recessed part by the embossing from the skin contact surface side.

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