JP2018167105A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which prevents leakage from both sides of the absorbent article, improves absorption performance of urine, and can easily retain a recessed groove shape.SOLUTION: An absorber 4 includes an absorber penetrating part 20 which is positioned in a longitudinal direction of an incontinence pad 1 and penetrates in a thickness direction over a longitudinal direction area including a urine discharging site H. By embossing from a surface side of a liquid permeable surface sheet 3 to the absorber penetrating part 20 along the absorber penetrating part 20 while the liquid permeable surface sheet 3 is laminated on the absorber 4, a recessed groove 22 where at least liquid permeable surface sheet 3 and a liquid impermeable back surface sheet 2 are integrated in the absorber penetrating part 20 is formed in the longitudinal direction. The liquid permeable surface sheet 3 is a sheet which has a wavy cross section, and where a protruding part 3c and a recessed part 3d extending in a pad longitudinal direction are repeatedly formed alternately in a pad width direction. While the recessed groove 22 is formed, the wavy cross section of the liquid permeable surface sheet 3 is retained inside the recessed groove 22.SELECTED DRAWING: Figure 10

Description

  The present invention relates to an absorbent article mainly used for incontinence pads, disposable diapers, and the like, and more particularly to an absorbent article having a groove formed along the longitudinal direction on the skin side.

  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, especially as a means of temporary storage and urine diffusion to catch urine that is dripped out at once, such as an incontinence pad, in a small area and quickly diffuse it. Various proposals have been made in which grooves are formed on the skin side along the longitudinal direction.

  As such an absorbent article, for example, in Patent Document 1 below, an upper layer absorbent body on the skin contact surface side and a lower layer absorbent body on the non-skin contact surface side are provided, and the upper layer absorbent body and the lower layer absorbent body The middle-high portion formed by the skin has a recess formed in the longitudinal direction formed on the skin contact surface side, and the recess is an opening penetrating the upper-layer absorber, and the upper-layer absorption so as to form the bottom surface of the opening. An absorbent article is disclosed in which the lower layer absorber is located on the lower surface of the body.

  In Patent Document 2 below, the absorbent laminate has an upper absorbent layer and a lower absorbent layer from the top sheet side, and the upper absorbent layer has an upper opening extending in the front-rear direction, and the lower absorbent layer. An absorbent article is disclosed in which the layer overlaps the upper opening and has a lower opening extending in the front-rear direction.

JP 2009-112590 A JP 2013-17531 A

  However, in the absorbent article described in Patent Document 1, the absorber has a two-layer structure of an upper layer and a lower layer, and an opening is provided only in the upper layer absorber, and no opening is provided in the lower layer absorber. By using the concave groove formed by the opening as a flexible shaft, deformation such that both sides in the width direction of the absorbent article protrude toward the skin side is less likely to occur, and both sides of the absorbent article are less likely to adhere to the skin side, Leakage from both sides was easy to occur.

  Further, in the absorbent article described in Patent Document 2, since the absorbent body has an opening penetrating in the thickness direction, both sides of the absorbent article in the width direction are skinned with the opening portion of the absorbent body as a flexible shaft. Although the top sheet arranged on the skin side of the absorbent body is disposed so as to straddle the skin side of the opening of the absorbent body, the width of the absorbent article When deformation occurs such that both sides protrude toward the skin side, the top sheet straddling the opening is bumped, and urine is less likely to flow quickly into the opening of the absorber, reducing the ability to absorb urine There was a fear. Further, when leg pressure is applied from both sides of the absorbent body, the absorbent body is easily deformed so that the opening of the absorbent body is closed, and the concave groove is difficult to maintain.

  Therefore, a main object of the present invention is to provide an absorbent article that prevents leakage from both sides of the absorbent article, improves urine absorption performance, and easily maintains the groove shape.

In order to solve the above problems, as the present invention according to claim 1, in an absorbent article in which an absorber is interposed between a liquid-permeable top sheet and a back sheet,
The absorbent body is provided with an absorbent body penetrating portion that penetrates in the thickness direction over the longitudinal range including the urine discharge site along the longitudinal direction of the absorbent article,
By embossing the absorbent body penetrating portion along the absorbent body penetrating portion from the surface side of the liquid permeable surface sheet in a state where the liquid permeable top sheet is laminated on the absorbent body, the absorbent body A concave groove in which at least the liquid-permeable topsheet and the backsheet are integrated in the penetrating portion is formed along the longitudinal direction,
The liquid-permeable surface sheet is a corrugated sheet in which convex portions and concave portions extending in the longitudinal direction of the absorbent article are alternately and repeatedly formed in the width direction of the absorbent article, and in the state where the concave grooves are formed, An absorbent article is provided in which the cross-sectional wave shape of the liquid-permeable surface sheet is maintained inside the concave groove.

  In the first aspect of the present invention, since the concave groove is formed along the absorber penetrating portion through which the absorbent body penetrates in the thickness direction, both sides of the absorbent article in the width direction have the concave groove as a flexible shaft. Deformation that protrudes toward the skin is likely to occur, and both sides of the absorbent article are in close contact with the skin surface, so that leakage of urine from both sides of the absorbent article can be prevented.

  In addition, the concave groove is embossed along the absorbent body penetrating portion from the surface side of the liquid permeable surface sheet to the absorbent penetrating portion in a state where the liquid permeable surface sheet is laminated on the absorbent body. Since the liquid-permeable surface sheet is disposed along the inner surface of the absorbent body penetrating portion, both widthwise sides of the absorbent article protrude toward the skin side with the concave groove as a flexible shaft. Even when the urine is deformed, urine can be prevented from flowing into the concave groove quickly and the urine absorption performance can be prevented from deteriorating.

  Furthermore, since at least the liquid-permeable surface sheet and the back sheet are integrated at the bottom of the groove, even when subjected to leg pressure from both sides of the absorber, deformation that closes the opening of the absorber is suppressed, It becomes easy to maintain the groove shape.

Moreover, in this absorbent article, the convex part and the recessed part of the liquid-permeable surface sheet provided at least in the formation area of the concave groove in a state where the concave groove is formed by making the liquid-permeable surface sheet into a corrugated cross section. Since each is stretched in the width direction of the absorbent article, the wave-like processing of the liquid-permeable surface sheet becomes a buffer, and even when the concave groove is formed by embossing from the surface side of the liquid-permeable surface sheet, excessively The liquid-permeable surface sheet is not pulled, and the tear of the liquid-permeable surface sheet can be prevented from being broken without reducing the strength of the liquid-permeable surface sheet. In addition, in the state where the concave groove is formed, the liquid-permeable surface sheet in the groove is not completely extended, and an uneven shape remains, so that the contact area between the liquid-permeable surface sheet and urine increases, Absorption efficiency can be improved. On the other hand, since the liquid-permeable surface sheet is formed in a corrugated cross section, the contact area with the skin is reduced, and the skin feels soft and soft. In order to form a groove while maintaining the uneven shape of the liquid-permeable surface sheet, when embossing from the surface side of the liquid-permeable surface sheet, the liquid-permeable surface is not squeezed strongly on the back sheet side. The non-skin side surface of the sheet can be formed by adhering the non-skin side surface to the surface on the back sheet side with a hot melt adhesive or the like, or by applying pin-like embossing or dot-like embossing.

  Moreover, in this absorbent article, since the cross-sectional wave shape of the liquid-permeable surface sheet is maintained inside the concave groove in a state where the concave groove is formed, the liquid-permeable surface sheet is provided. A concave groove can be formed without impairing the function, and urine can be quickly transferred to the absorber.

  Moreover, the following effects are show | played by combining a liquid-permeable surface sheet with a sheet | seat with a wave-like cross section, and forming the said ditch | groove in an absorber penetration part. (1) Since no absorber is interposed on the lower layer side of the liquid-permeable surface sheet, the urine in the recessed groove diffuses inside the liquid-permeable surface sheet and flows along the recesses of the liquid-permeable surface sheet, Moreover, by flowing through a space formed between the convex portion of the liquid-permeable surface sheet and the lower layer side sheet, the liquid permeable surface sheet quickly diffuses in the groove longitudinal direction.

  (2) Since the liquid-permeable surface sheet is formed in a corrugated cross-section, air flows through the gap between the fibers forming the convex part and the concave part and the skin surface at the part in contact with the skin around the concave groove. And air permeability is improved. Moreover, since the air which flowed through the said space | gap and gap | interval flows in into a ditch | groove and the cross-sectional wave shape of a liquid-permeable surface sheet is maintained also in a ditch | groove, the flow of air becomes favorable also in a ditch | groove. Further, when a material having air permeability is used as the back sheet, there is no absorber between the liquid-permeable surface sheet and the back sheet in the groove, so that moisture in the groove is easily released to the outside. Become.

  (3) In the present absorbent article, by causing a deformation in which both sides of the absorbent article protrude toward the skin side using the concave groove as a flexible shaft, a region on the outer side in the width direction from the concave groove is easily adhered to the skin surface. However, since the liquid-permeable surface sheet in this region is also formed in a corrugated cross-section, the liquid-permeable surface sheet and the skin surface come into contact with the skin in the form of dots at the top of the convex portion, and there is a burden on the skin. It is reduced.

  (4) Even when deformations such as the opening of the groove are closed due to leg pressure from both sides in the width direction of the absorbent article, the liquid-permeable surface sheets formed in a corrugated cross section on both sides are combined to form the groove. The opening is prevented from being completely closed, and the liquid permeability and the air permeability into the concave groove are ensured from the gap between the corrugated surface sheets.

As the present invention according to claim 2, in the bottom surface of the groove, at least the liquid-permeable topsheet and the backsheet and are bonded by adhesives according to claim 1, they are joined by a pin Embossed or dots Embossed Symbol An absorbent article is provided.

In the invention according to the second aspect , as a means for integrating the liquid-permeable top sheet and the back sheet on the bottom surface of the concave groove, it is possible to perform adhesive bonding , pin-like embossing or dot-like embossing. It prescribes. Thereby, a ditch | groove can be formed, maintaining the uneven | corrugated shape of a liquid-permeable surface sheet.

As the present invention according to claim 3, between the absorber and the back sheet, so as to extend over said groove in the width direction on both sides, one of claims 1, 2 the diffusion sheet in the width direction is interposed An absorbent article as described above is provided.

In the invention according to claim 3 , the sheet flows along the concave groove by interposing the sheet for diffusion in the width direction so as to straddle the concave groove in the width direction between the absorber and the back sheet. Urine is diffused in the width direction, making it easier for the absorber to absorb it. Further, by interposing the diffusion sheet on the bottom surface of the concave groove, the bottom surface of the concave groove can be reinforced so as not to easily cause bending in the width direction of the absorbent article having the concave groove as a flexible shaft. It is possible to more reliably prevent the groove from being closed due to the leg pressure.

The present invention according to claim 4 provides the absorbent article according to claim 3 , wherein the diffusion sheet is a sheet in which fibers are oriented along the width direction of the absorbent article.

In the invention of claim 4 , as the diffusion sheet, by using a sheet in which fibers are oriented along the width direction of the absorbent article, along the width direction of the absorbent article which is the fiber orientation direction. Since urine easily diffuses, the urine in the groove is quickly absorbed by the absorbers on both sides.

As the present invention according to claim 5 , the diffusion sheet is a sheet in which a number of high-density regions are formed at intervals in the longitudinal direction of the absorbent article along the width direction of the absorbent article. 3. An absorbent article according to any one of 3 is provided.

In the invention of claim 5 , as the diffusion sheet, a sheet in which a large number of high-density regions are formed along the width direction of the absorbent article and at intervals in the longitudinal direction of the absorbent article. Therefore, since urine easily diffuses in the width direction of the absorbent article along the high-density region, the urine in the groove is quickly absorbed by the absorbers on both sides.

  As described above in detail, according to the present invention, it is possible to provide an absorbent article that can prevent leakage from both sides of the absorbent article, improve urine absorption performance, and maintain a concave groove shape.

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. It is a cross-sectional view of the incontinence pad 1 showing a deformed state at the time of wearing. The other form example of the ditch | groove 22 is shown, (A) is a cross-sectional view which shows before a deformation | transformation and (B) after a deformation | transformation. It is an expansion perspective view of 3 A of liquid-permeable surface sheets which concern on a 1st form example. It is sectional drawing of 3 A of liquid-permeable surface sheets which concern on a 1st form example. It is sectional drawing which shows the manufacture point of 3 A of liquid-permeable surface sheets which concern on a 1st form example. It is an expansion perspective view of the liquid-permeable surface sheet 3B which concerns on a 2nd form example. It is sectional drawing of the ditch | groove 22 which has arrange | positioned the liquid-permeable surface sheet 3B which concerns on a 2nd form example. 3A is a plan view showing a liquid-permeable surface sheet 3C according to a third embodiment, (A) before embossing and (B) after embossing. FIG. It is sectional drawing which shows the embossing method (the 1) for forming the concave groove. It is a top view which shows the embossing method (the 2) for forming the concave groove. It is sectional drawing which shows the embossing method (the 2) for forming the concave groove. It is sectional drawing which shows the embossing method (the 3) for forming the concave groove. It is a top view of the ditch | groove 22 part which shows liquid-permeable surface sheet 3D which concerns on a 4th form example. It is a perspective view of the ditch | groove 22 part which shows the liquid-permeable surface sheet 3E which concerns on a 5th example. It is an expanded view of the incontinence pad 1 which concerns on another example of a form. It is sectional drawing of the incontinence pad 1 which concerns on another example of a form. (A)-(C) are the expanded views of the incontinence pad 1 which shows the other Example of the groove 22. (A)-(C) are the expanded views of the incontinence pad 1 which shows the other Example of the groove 22. (A)-(F) are the expanded views of the incontinence pad 1 which shows the other Example of the groove 22.

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, and a substantially side edge portion of the absorbent body 4 as an upright base end, and provided at least in a predetermined section in the longitudinal direction so as to include the urine discharge site H. It is mainly composed of a pair of left and right three-dimensional gathers BS, side nonwoven fabrics 7 and 7 forming the BS, and around the absorbent body 4, the liquid-impervious back sheet 2 and the transparent material are disposed at the longitudinal edges. Liquid surface sheet 3 and The liquid-impervious back sheet 2 and the side nonwoven fabric whose outer edge portions are bonded by an adhesive such as hot melt or an adhesive means such as heat seal, and whose both side edge portions extend laterally from the absorbent body 4. 7 is bonded by an adhesive such as hot melt or an adhesive means such as heat sealing. In addition, a hydrophilic second sheet can be arrange | positioned between the said liquid-permeable surface sheet 3 and the absorber 4 as needed.

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. Of these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of bulkiness and high compression recovery. The liquid-permeable surface sheet 3 may have a flat plate shape with a normal surface, and as will be described in detail later, the liquid-permeable surface sheet 3 has a concavo-convex shape, a corrugated cross-section shape, and a large number of openings. It can be formed in various forms such as those having

  The absorbent body 4 is composed of absorbent fibers such as cotton-like pulp and a highly water-absorbing 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 dissolving pulp, and artificial cellulose fibers such as rayon and acetate. 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 diffuses urine quickly and prevents the urine 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. In the production process, the superabsorbent polymer having the water-absorbing performance can be adjusted in absorption capacity (water-absorbing power) and absorption rate by adjusting the crosslinking density and the crosslinking density gradient.

  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 hydrophobic fibers, it is desirable to use the synthetic fibers surface-treated with a hydrophilizing agent so as to have affinity for urine.

In the measurement of the basis weight, a 20 mm × 40 mm (± 2 mm) dimension is cut from the sample with a roll cutter, the weight is measured, and the weight per 1 m ² is converted into the basis weight. Moreover, the measurement of a pulp weight and a polymer weight takes out only a pulp fiber or a polymer from the absorber 4, and measures the weight with a measuring device. The thickness is measured by using a thickness measuring instrument (peacock, dial thickness gauge large type, model J-B (measurement range 0 to 35 mm) of Ozaki Mfg. Co., Ltd., with the sample and the thickness measuring instrument horizontal.

  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. As such a nonwoven fabric, a nonwoven fabric processed by a spunbond method and an SMS method excellent in balance between thinness and strength, and an elastic fiber made of a thermoplastic elastomer resin are directly connected to a spinning process such as a spunbond method or a melt blow method. Nonwoven fabrics mainly made of stretchable materials such as nonwoven fabrics, latex, urethane and olefinic fibers processed by the method of forming a web are suitable. 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.

  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. By joining, side flap portions where the absorber 4 does not exist are formed on both sides of the absorber 4.

  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 emphasis is placed on urine absorbability, 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 It is the said side flap part which is located outside from the three-dimensional gather 10, and extends to the side rather than the said absorber 4, Comprising: It stands on the skin side formed with the liquid-impermeable back sheet 2 and the side nonwoven fabric 7. A solid gather BS having a double gather structure composed of a pair of left and right outer solid gathers 11 and 11 is formed. In addition, the said three-dimensional gather BS should just contain the outer side three-dimensional gather 11 formed in the said side flap part at least.

  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 concave groove 22 for inflow of urine is formed along the longitudinal direction on the skin side. The concave groove 22 receives urine discharged on the surface of the liquid-permeable surface sheet 3, temporarily stores urine, induces urine diffusion in the front-rear direction, and absorbs urine into the absorber 4. This is to increase the speed and prevent side leakage.

  In the thickness direction from the skin surface to the non-skin surface, the absorbent body 4 extends along the longitudinal direction of the incontinence pad 1 and includes the urine discharge site H in advance in the portion where the concave groove 22 is to be formed. The absorbent body penetrating part 20 is provided. The absorber penetrating portion 20 is a portion where pulp and polymer constituting the absorber are not interposed, and the absorber is a portion opened in the thickness direction.

  As shown in FIG. 1, the absorbent body penetrating portion 20 is formed only in one strip at the center in the pad width direction corresponding to the urine discharge site H and in the middle in the longitudinal direction with respect to the absorbent body 4. Although it is preferable, it can be formed in various forms such as being formed in a plurality of strips spaced apart in the width direction of the incontinence pad 1 or in a discontinuous line shape spaced in the longitudinal direction of the pad (FIG. 20). To FIG. 22). In addition, when providing the some absorber penetration part 20, it is preferable to provide the ditch | groove 22 by embossing from the surface side of the liquid-permeable surface sheet 3 with respect to each absorber penetration part 20. FIG.

  The planar dimension of the absorbent penetrating portion 20 is preferably such that the length in the longitudinal direction of the pad is 100 to 180 mm and the groove width is 5 to 30 mm.

  In a state where the liquid-permeable surface sheet 3 is laminated on the absorbent body 4 provided with the absorber-penetrating part 20, the absorbent-penetrating part 20 penetrates the absorbent-penetrating part 20 from the surface side of the liquid-permeable surface sheet 3. By providing the embossed portion 21 along the portion 20, the concave groove 22 is formed along the longitudinal direction of the pad. The embossed portion 21 is provided within a range in which the absorbent body penetrating portion 20 is formed and does not squeeze the surrounding absorbent body 4.

  By applying the embossed portion 21 from the surface side of the liquid-permeable surface sheet 3, at least the liquid-permeable surface sheet 3 and the liquid-impermeable back sheet 2 are integrated. When the absorber 4 is surrounded by the encapsulating sheet 5 as in this example, the encapsulating sheet 5 is interposed between the liquid-permeable top sheet 3 and the liquid-impermeable back sheet 2 in the absorber penetrating portion 20. Therefore, by providing the embossed portion 21, the liquid-permeable top sheet 3, the encapsulating sheet 5, and the liquid-impervious back sheet 2 are integrated. In addition, when a hydrophilic second sheet is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4, or between the liquid-permeable surface sheet 3 and the absorbent body 4 or between the absorbent body 4 and the liquid-impervious body. When a liquid diffusible diffusion sheet is interposed between the back sheet 2 and the back sheet 2, the embossed portion 21 is applied to the liquid permeable top sheet 3, the encapsulating sheet 5, and the liquid impermeable back sheet. In addition to 2, the second sheet and the diffusion sheet are also integrated. The embossed portion 21 may heat-bond each component member by heating in a compressed state, or apply pressure without heating the non-skin side surface of the liquid-permeable surface sheet 3 as a hot melt adhesive or the like. It is also possible to maintain the shape of the liquid-permeable surface sheet 3 formed in an uneven shape, a wave shape, or the like by joining with the joining means.

  In order to integrate at least the liquid-permeable top sheet 3 and the liquid-impervious back sheet 2 on the bottom surface of the concave groove 22, press bonding using embossing or adhesion using an adhesive is performed with a predetermined pattern on the bottom surface of the concave groove 22. It can be done by applying. As shown in FIG. 1, the crimping or bonding pattern includes a wave-like emboss 25 formed in a pattern in which concaves and convexes are formed on both sides in the width direction so as to reciprocate both side edges of the concave groove 22 along the concave groove 22. The wavy emboss 25 can be a pattern composed of a linear emboss 26 formed along the concave groove 22 on the side edge opposite to the convex portion protruding outward in the width direction. Further, although not shown in the figure, a pattern divided into a number of regions such as a lattice shape or a rhombus shape may be provided. In addition to this, a large number of pin-shaped embosses 21a, 21a,... Or dot-shaped embosses are applied to the absorbent body penetrating portion 20 from the surface side of the liquid-permeable surface sheet 3 (see FIGS. 13 and 14). It can also be achieved by embossing with an embossing width smaller than the width of the penetrating part 20 or embossing with an embossing convex part 24 having a flat tip (see FIGS. 15 to 17).

  By providing the concave groove 22 having the above-described configuration, the incontinence pad 1 does not contain an absorber at the bottom of the concave groove 22 as shown in FIG. Deformation in which both sides in the width direction of the pad 1 protrude toward the skin side is likely to occur. For this reason, at the time of wearing, the three-dimensional gather BS formed on both sides of the skin side of the incontinence pad 1 is likely to be in close contact with the skin surface. Can be prevented.

  Moreover, in the said concave groove 22, since the liquid-permeable surface sheet 3 is arrange | positioned along the inner surface of the absorber penetration part 20, the surface sheet was arrange | positioned so that the upper surface of the opening part of the conventional absorber might be straddled. As in the case of an absorbent article, there is no possibility that the surface sheet will sag when the absorbent article is bent in the width direction with the opening of the absorbent body as a flexible shaft. That is, in this incontinence pad 1, since the liquid-permeable surface sheet 3 is arranged along the inner surface of the absorbent body penetrating portion 20, the incontinence pad 1 is bent in the width direction with the concave groove 22 as a flexible shaft. However, urine can quickly flow into the concave groove 22, and the urine absorption performance can be prevented from deteriorating.

  Further, since at least the liquid-permeable top sheet 3 and the liquid-impervious back sheet 2 are integrated in a predetermined pattern at the bottom of the concave groove 22, even when leg pressure is applied from both sides in the width direction during mounting, Deformation that closes the opening of the absorber penetrating portion 20 is suppressed, and the groove shape is easily maintained.

  Here, as shown in FIG. 2, both side surfaces of the concave groove 22 (absorber penetrating portion 20) are formed perpendicular to the upper surface (plane) of the absorber 4 or at an angular difference of up to about 10 ° with this. In this case, as shown in FIG. 4, when the incontinence pad 1 is bent in the width direction when the concave groove 22 is flexible, the gap between the skin side ends of both side surfaces of the concave groove 22 is reduced, There arises a problem that the opening to the side becomes narrow. Therefore, as shown in FIG. 5 (A), by forming both side surfaces of the concave groove 22 in an inclined shape that inclines outward toward the skin side, as shown in FIG. 5 (B). Even when the incontinence pad 1 is bent, the opening of the concave groove 22 can be prevented from being narrowed. The inclination angle α on both side surfaces of the concave groove 22 (absorber penetration part 20) is preferably about 15 ° to 30 °.

  Next, an example of the liquid permeable top sheet 3 will be described. The liquid-permeable surface sheet 3 can be formed in various forms depending on purposes such as improving the permeability and diffusibility of urine, reducing the contact area with the skin, and improving the feeling of touch. is there.

  As liquid-permeable surface sheet 3A which concerns on a 1st form example, as FIG.6 and FIG.7 shows, while having a relatively high fabric weight, many dome-shaped convex parts 3a which protrude to the skin side 3a... And a recess 3b that is formed along the periphery of the protrusion 3a, has a relatively low basis weight compared to the protrusion 3a, and is recessed to the skin side of the protrusion 3a. It can be configured.

  As the liquid-permeable surface sheet 3A having such an uneven shape, those disclosed in Japanese Patent Application Laid-Open Nos. 2004-466 and 2003-250836 can be used. In these gazettes, a large number of dome-shaped parts are partially joined by a large number of joints 14, 14... In a predetermined pattern consolidated in the thickness direction, and portions other than the joints 14, 14. Are made of the convex portions 3a, 3a. The joints 14, 14... Are arranged in a zigzag plane pattern, and the protrusions 3a, 3a... Are arranged in a zigzag plane pattern.

  Further, as disclosed in the publication, the liquid-permeable surface sheet 3A is disposed on the skin 4 side and the absorber 4 side as shown in FIGS. It is preferable to constitute a laminated structure with the lower layer 3β. The upper layer 3α and the lower layer 3β are partially joined at the numerous joints 14, 14.

  The lower layer 3β is preferably composed of a nonwoven fabric containing heat-shrinkable fibers that exhibit thermoplasticity. That is, by forming the lower layer 3β from a nonwoven fabric containing heat-shrinkable fibers, the upper layer 3α and the lower layer 3β are joined at the joint portion 14, and then the lower layer 3β is thermally contracted to thereby join the joint portion 14 of the upper layer 3α. The part surrounded by is protruding so as to protrude to the skin side.

  As shown in FIG. 8 (A), the manufacturing method of the liquid-permeable surface sheet 3A is a state in which the upper layer 3α and the lower layer 3β are laminated, as shown in FIG. 8 (B). After the upper layer 3α and the lower layer 3β are partially joined by a large number of joints 14, 14... In a predetermined pattern by pressing from the outer surface side, the heat contained in the lower layer 3β as shown in FIG. This is performed by shrinking the lower layer 3β by performing a heat treatment such as applying hot air at a temperature higher than the temperature at which the shrinkable fiber starts to shrink. When the lower layer 3β is thermally shrunk, the space between the adjacent joints 14 and 14 is narrowed, so that the fibers of the upper layer 3α between them are gathered together and the basis weight becomes relatively high, and is surrounded by the joints 14, 14. As the area goes to the center side, the basis weight is higher, and a convex portion 3a protruding to the skin side is formed in a dome shape.

  Further, as shown in the publication, the fiber density of the lower layer 3β may be set higher than the fiber density of the upper layer 3α. In such a liquid-permeable surface sheet 3A, urine quickly moves from the upper layer 3α having a relatively low fiber density toward the lower layer 3β having a relatively high fiber density due to the fiber density gradient.

  In the liquid-permeable surface sheet 3A according to the first embodiment, the uneven shape of the liquid-permeable surface sheet 3A is maintained inside the groove 22 (the circumferential surface of the groove 22) in the state where the groove 22 is formed. To be. Thereby, various functions provided in the uneven liquid-permeable surface sheet 3 </ b> A can be maintained even inside the concave groove 22.

  In order to form the concave groove 22 so that the uneven shape of the liquid-permeable topsheet 3A is maintained, the tip of the embossed convex portion 24 is crimped to the liquid-impervious backsheet 2 side as shown in FIG. Embossing to such an extent that the non-skin surface side of the liquid-permeable surface sheet 3A is bonded by a bonding means such as a hot melt adhesive, or as shown in FIG. 13 and FIG. This can be achieved by applying a large number of pin-shaped embosses 21a, 21a,...

  The following effects are produced by combining the liquid-permeable surface sheet 3 </ b> A with a concavo-convex sheet and forming the concave groove 22 in the absorber penetrating portion 20.

  (1) Since the absorbent body 4 is not interposed on the non-skin side of the liquid-permeable surface sheet 3A at the bottom of the groove 22, the urine in the groove 22 diffuses inside the liquid-permeable surface sheet 3A and has unevenness. By flowing along the concave portion 3b, it is quickly diffused in the longitudinal direction of the groove. Thereby, since urine can be absorbed in the wide range of the absorber 4, urine can be absorbed quickly.

  (2) Since the liquid-permeable surface sheet 3A is formed in a concavo-convex shape, the gap between the fibers constituting the convex portion 3a and the concave portion 3b and the skin surface at the portion in contact with the skin surface around the concave groove 22 The air flows and air permeability is improved. In addition, the air that has flowed through the gaps in the fibers of the protrusions 3 a and the gaps in the recesses 3 b and reached the concave grooves 22 flows into the concave grooves 22, and the unevenness of the liquid-permeable surface sheet 3 A is also formed in the concave grooves 22. Since it is maintained, the air flow is good even in the concave groove 22. Furthermore, when the above-mentioned water-impervious / moisture-permeable sheet material is used as the liquid-impervious back sheet 2, the bottom of the groove 22 is between the liquid-permeable surface sheet 3 </ b> A and the liquid-impervious back sheet 2. Since the absorber 4 is not interposed, moisture in the concave groove 22 and moisture in the incontinence pad 1 are easily released to the outside.

  (3) In the incontinence pad 1, as described above, since the absorbent body 4 is not interposed at the bottom of the concave groove 22, deformation in which both sides in the width direction of the incontinence pad 1 protrude toward the skin side with the concave groove 22 as a flexible shaft. It is easy to occur and the area | region of the width direction both sides from the ditch | groove 22 is easy to adhere | attach on a skin surface. Since the liquid-permeable surface sheet 3A in the regions on both sides in the width direction of the concave groove 22 that is in close contact with the skin surface is naturally formed in an uneven shape, the liquid-permeable surface sheet 3A and the skin surface are uneven. Since the point-shaped contact is made at the top of the part 3a, the burden due to contact with the skin is reduced.

  (4) By using the liquid-permeable surface sheet 3A, even when deformation occurs such that the opening of the concave groove 22 is closed due to leg pressure from both sides of the pad width direction, the liquid-permeable surface is also formed on both side surfaces of the concave groove 22. Since the concave and convex shape of the conductive surface sheet 3A is maintained, the liquid permeability and ventilation into the concave groove 22 are caused by a gap when the concave and convex surfaces of the liquid permeable surface sheets 3A and 3A on both sides are abutted with each other. Sex will be secured.

  Next, as the liquid-permeable surface sheet 3B according to the second embodiment, as shown in FIG. 9, convex portions 3c and concave portions 3d extending in the longitudinal direction of the incontinence pad 1 are alternately and repeatedly formed in the pad width direction. It is made of a non-woven fabric having a corrugated cross section. The convex portion 3 c and the concave portion 3 d extend linearly substantially parallel to the longitudinal direction of the incontinence pad 1. The convex portions 3c and the concave portions 3d are continuously connected in the pad width direction, and are alternately arranged so as not to have a flat portion. The convex portion 3c is curved convexly toward the skin side, and the concave portion 3d is curved convexly toward the non-skin side. The convex portion 3c extends along the longitudinal direction of the pad and forms a collar portion. The concave portion 3d also extends along the pad longitudinal direction and forms a groove.

  As shown in FIG. 10, the liquid-permeable surface sheet 3B is laminated on the skin side surface of the absorbent body 4, and is embossed by the embossed convex portions 24 from the surface side (skin surface side) of the liquid-permeable surface sheet 3B. The concave groove 22 is formed by applying the portion 21. In a state where the concave groove 22 is formed, at least the convex portion 3c and the concave portion 3d of the liquid-permeable surface sheet 3B provided in the formation region of the concave groove 22 are extended in the pad width direction. . Elongation in the pad width direction means that the liquid-permeable surface sheet 3B is stretched by the depth of the concave groove 22 by embossing, and the convex curved shape of the convex portion 3c and the concave portion 3d is released or reduced. This is a state in which the liquid-permeable surface sheet 3B is stretched in the pad width direction.

  Thereby, in the processing of the concave groove 22, the wave-like processing of the liquid-permeable surface sheet 3B serves as a buffer to reduce the tensile stress, and the liquid-permeable surface sheet 3B is not excessively pulled. The tear during mounting can be prevented without reducing the strength of the topsheet 3B.

  Further, as shown in FIG. 10, the liquid-permeable surface sheet 3 </ b> B does not completely extend and the uneven shape remains even in the state where the concave grooves 22 are formed, so that the liquid-permeable surface sheet is compared with a normal flat sheet. Since the contact area between 3B and urine increases, urine absorption efficiency can be enhanced.

  On the other hand, in the liquid-permeable surface sheet 3B having a wavy cross section, the convex portion 3c comes into contact with the skin surface, so that the contact area with the skin is reduced, and the skin is gentle and soft. Become.

  In the liquid-permeable surface sheet 3B according to the second embodiment, the cross-sectional corrugation of the liquid-permeable surface sheet 3B is maintained inside the groove 22 (the circumferential surface of the groove 22) with the groove 22 formed. To be. Thereby, the concave groove 22 can be formed without impairing the function of the liquid-permeable surface sheet 3B having a corrugated cross section, and urine can be quickly transferred to the absorber 4. In order to maintain the cross-sectional wave shape, it can be achieved by the same method as the liquid-permeable surface sheet 3A according to the first embodiment.

  Moreover, the following effects are show | played by combining the liquid-permeable surface sheet 3B with a sheet | seat with a cross-sectional wave shape, and forming the said groove 22 in the absorber penetration part 20. FIG.

  (1) Since the absorbent body 4 is not interposed on the non-skin side of the liquid-permeable surface sheet 3B at the bottom of the groove 22, the urine in the groove 22 diffuses inside the liquid-permeable surface sheet 3B and is permeable. By flowing along the concave portion 3d of the liquid surface sheet 3B and flowing through the space formed between the convex portion 3c of the liquid permeable surface sheet 3B and the non-skin side sheet (encapsulated sheet 5), the groove length Will spread quickly in the direction. Urine that has diffused quickly in the longitudinal direction of the groove is absorbed by the absorber 4 from both side surfaces of the concave groove 22, so that urine can be absorbed quickly in a wide range of the absorber 4.

  (2) Since the liquid-permeable surface sheet 3B is formed in a corrugated cross section, at the portion in contact with the skin around the concave groove 22, the gap between the fibers constituting the convex portion 3c and the concave portion 3d and the skin surface The air flows and air permeability is improved. In addition, the air that has flowed through the gaps between the fibers of the convex portions 3 c and the concave portions 3 d and the skin surface flows into the concave grooves 22, and even in the concave grooves 22, Since the cross-sectional wave shape is maintained, the air flow is good even in the concave groove 22. Further, when the above-described water-impervious / moisture-permeable sheet material is used as the liquid-impervious back sheet 2, absorption is performed between the liquid-permeable surface sheet 3 </ b> B and the liquid-impervious back sheet 2 at the bottom of the groove 22. Since the body does not intervene, moisture in the concave groove 22 and moisture in the incontinence pad 1 are easily released to the outside.

  (3) The incontinence pad 1 has a structure in which the concave groove 22 serves as a flexible shaft and the both sides of the pad are easily deformed to protrude to the skin side, and the region outside in the width direction from the concave groove 22 tends to adhere to the skin surface. However, since the region on the outer side in the width direction from the concave groove 22 is also composed of the liquid-permeable surface sheet 3B having a corrugated cross-section, the skin is brought into contact with the liquid-permeable surface sheet 3B and the skin surface. The burden of is reduced.

  (4) In the incontinence pad 1, even when a deformation that closes the opening of the concave groove 22 occurs due to leg pressure from both sides of the pad width direction, the permeable surface sheet 3 </ b> B having a corrugated cross section on both side surfaces of the concave groove 22. Therefore, the cross-sectional corrugated liquid-permeable surface sheets 3B and 3B are prevented from being joined together and the opening of the concave groove 22 is prevented from being completely closed. Liquid permeability and air permeability from the gap into the concave groove 22 are ensured.

  Next, as the liquid-permeable surface sheet 3C according to the third embodiment, as shown in FIG. 11A, the liquid-permeable surface sheet 3C is composed of a nonwoven fabric provided with a large number of apertures 15, 15. The opening 15 is a portion that penetrates from one side surface to the other side surface of the liquid-permeable surface sheet 3C and does not have nonwoven fabric fibers. The planar shape may be circular, but is preferably a planar shape that is long in the longitudinal direction of the pad. In addition to the elliptical shape in the illustrated example, an elliptical shape, a rectangular shape, a diamond shape, a polygonal shape, and the like are preferable.

  In order to give a large number of apertures 15, 15 ... to the liquid-permeable surface sheet 3C, it is formed by perforation, formed by spraying a fluid, formed by piercing a heated pin, etc. Known means can be employed. Alternatively, the perforation treatment may be performed using the perforated sheet manufacturing apparatus described in Japanese Patent Application Laid-Open No. 2008-18537.

  Examples of the liquid-permeable surface sheet 3C having a large number of apertures 15, 15..., JP 2011-135979 A, JP 2008-25083 A, JP 2009-185408 A, JP 2010-185 A. 84317, JP, 2014-68954, etc. can be used.

  A large number of the openings 15, 15... Are arranged at predetermined intervals in the pad width direction and the longitudinal direction over the entire surface of the liquid-permeable surface sheet 3C. As shown in FIG. 11 (A), the openings 15 may be arranged in a lattice shape arranged in a straight line with respect to the pad width direction and the longitudinal direction, or arranged in every other row in the pad width direction. A staggered staggered pattern may be used.

  As shown in FIG. 11 (B), the liquid-permeable surface sheet 3C has at least a concave shape as shown in FIG. 11 (B) in a state in which the groove 22 is formed by embossing from the surface side (skin surface side) of the liquid-permeable surface sheet 3C. Openings 15, 15... Provided in the formation region of the groove 22 are expanded in the pad width direction. That is, in a state where the liquid-permeable surface sheet 3C is laminated on the surface side of the absorbent body 4 on which the absorbent body penetrating part 20 is formed, the surface of the liquid-permeable surface sheet 3C from the surface side to the bottom surface of the absorbent body penetrating part 20 When the embossed portion 21 is provided by the embossed convex portion 24 having an emboss width smaller than the width of the absorbent penetrating portion 20, the liquid-permeable surface sheet 3C is stretched by the cross-sectional shape of the absorbent penetrating portion 20, and the tensile force at this time However, the holes 15 are concentrated in the openings 15, 15 to expand the holes 15 in the pad width direction.

  Thus, in this incontinence pad 1 using the said liquid-permeable surface sheet 3C, in the state which formed the groove 22 by giving the embossing part 21 from the surface side of the liquid-permeable surface sheet 3C, at least the groove 22 Are opened in the pad width direction, so that the urine temporarily stored in the groove 22 passes through the expanded holes 15, 15... It becomes easy to do. In this way, urine in the groove is quickly transferred to the absorber 4 through the liquid-permeable surface sheet 3, so that urine in the groove is prevented from overflowing to the surface, and urine remains on the surface. The surface feels smoother. Moreover, since the tensile force applied to the liquid-permeable surface sheet 3C at the time of embossing is absorbed by the deformation of the openings 15, 15 ..., the liquid-permeable surface sheet 3C is not excessively pulled, The absorbent body 4 around the concave groove 22 is not compressed, and the urine absorbability and wearability of the absorbent body can be maintained.

  Moreover, the following effects are obtained by combining the liquid-permeable surface sheet 3C with a sheet having a large number of apertures 15, 15... And forming the concave groove 22 in the absorber penetrating portion 20. Played.

  (1) Since the absorber 4 does not intervene at the bottom of the concave groove 22, urine that has flowed through the opening 15 quickly diffuses along the longitudinal direction of the groove. By promoting the diffusion of urine in the longitudinal direction of the groove, urine absorption from both side surfaces to the absorber 4 is performed quickly.

  (2) When the above-mentioned water-impervious / breathable sheet material is used as the liquid-impermeable back sheet 2, the air permeability is further improved through the opening 15 provided at the bottom of the concave groove 22.

  As liquid-permeable surface sheet 3D which concerns on a 4th form example, what was formed in the uneven | corrugated shape similar to 3 A of liquid-permeable surface sheets which concern on the said 1st form example shown by FIG.6 and FIG.7 is used. As shown in FIGS. 15 and 16, the liquid-permeable surface sheet 3 </ b> D according to the fourth embodiment has the concave and convex portions 3 a compressed on the bottom of the concave grooves 22 in a state where the concave grooves 22 are formed. In the first embodiment, a large number of the high compression portions 16, 16... And the concave and convex concave portions 3 b are compressed, and a low compression portion 17 having a lower density than the high compression portion 16 is formed. It differs from the liquid-permeable surface sheet 3A which concerns.

  In the liquid-permeable surface sheet 3D according to the fourth embodiment, the liquid-permeable surface sheet 3 is formed by forming the high pressing portion 16 and the low pressing portion 17 on the bottom surface of the concave groove 22 due to the density difference of the fibers. The transferability and diffusibility of urine absorbed in the urine are improved. In addition, since a large number of the high compression portions 16 are formed on the bottom surface of the concave groove 22, the rigidity of the concave groove 22 is increased, deformation due to external force such as leg pressure can be prevented, and the shape of the concave groove 22 is easily maintained. Furthermore, since the high compression part 16 and the low compression part 17 can be simultaneously formed only by embossing once from the surface side of the liquid-permeable surface sheet 3D, the high-pressure expression part further compressed from the bottom surface of the groove as in the prior art. Compared with the case where the surface material is provided, excessive tensile stress does not act on the surface material, and the surface material can be prevented from being torn. Further, since the high compression portion 16 and the low compression portion 17 are formed by applying the embossing convex portion 24 having a flat tip from the surface side of the liquid-permeable surface sheet 3D, there is no clogging of the embossing roll, Manufacturing operability is stabilized.

  Further, the combination of the formation of a large number of the high compression portions 16 and the low compression portions 17 at the bottom of the concave groove 22 and the formation of the concave groove 22 in the absorber penetration portion 20 has the following effects. Is done.

  (1) As described above, the urine diffusibility is increased by the difference in fiber density between the high compression portion 16 and the low compression portion 17, and the absence of an absorbent on the non-skin side of the liquid-permeable surface sheet 3D. Combined with the effect of increasing diffusivity, urine diffusivity is further increased.

  (2) Since the absorber does not intervene at the bottom of the concave groove 22, the rigidity of the concave groove 22 is lowered. However, since the large number of high compression portions 16, 16,... Are provided, the concave groove 22 is reinforced. .

  As the liquid-permeable surface sheet 3E according to the fifth embodiment, a sheet having a corrugated cross section similar to the liquid-permeable surface sheet 3B according to the second embodiment shown in FIG. 9 is used. In the liquid-permeable surface sheet 3E according to the fifth embodiment, as shown in FIG. 17, the high fiber in which the convex portion 3c having a corrugated cross section is compressed at the bottom of the concave groove 22 in the state where the concave groove 22 is formed. The transparent portion according to the second embodiment is that the density portion 18 and the low fiber density portion 19 in which the recessed portion 3d having a corrugated cross section is compressed are alternately formed along the groove longitudinal direction with respect to the groove width direction. It is different from the liquid surface sheet 3B.

  In the liquid-permeable surface sheet 3E according to the fifth embodiment, in the convex portion 3c having a wavy cross section, fibers gather together during pressing and a high fiber density portion 18 having a high fiber density is formed along the groove direction. . The high fiber density portion 18 improves the diffusibility of urine along the concave groove 22 and acts to maintain the shape so that the concave groove 22 is not crushed by leg pressure or the like.

  Further, the high fiber density portion 18 is formed by combining the formation of the high fiber density portion 18 and the low fiber density portion 19 at the bottom of the groove 22 and the formation of the groove 22 in the absorber penetration portion 20. The effect of improving the diffusibility of urine along the longitudinal direction of the groove by providing the groove and the effect of improving the diffusibility of urine by not interposing the absorbent body 4 at the bottom of the concave groove 22 are combined to further increase the longitudinal direction of the groove. The diffusibility of urine along the direction is improved.

  Next, the incontinence pad 1 that improves the diffusibility of urine in the concave groove 22 will be described. In the incontinence pad 1, there is a possibility that urine temporarily stored in the concave groove 22 is difficult to move to the absorbent body 4 because the absorbent body is not interposed on the bottom surface of the concave groove 22. Therefore, in the incontinence pad 1, as shown in FIGS. 18 and 19, the pad width is set so as to straddle the groove 22 on both sides in the width direction between the absorbent body 4 and the liquid-impermeable back sheet 2. A diffusion sheet 30 that promotes diffusion of urine in the direction can be interposed. The diffusion sheet 30 is a sheet made of nonwoven fabric, paper, or the like that is configured so that urine that has permeated the diffusion sheet 30 from the bottom surface of the concave groove 22 is easily diffused in the pad width direction.

  Specifically, the diffusion sheet 30 may be a sheet in which fibers are oriented along the pad width direction. That is, the diffusion sheet 30 is formed so as to have fiber orientation in a direction orthogonal to the longitudinal direction of the groove. As a result, urine that has permeated into the diffusion sheet 30 from the concave groove 22 easily diffuses along the fiber direction oriented in the pad width direction, and is easily absorbed by the absorbent bodies 4 on both sides of the concave groove 22. In addition, that a fiber is oriented along the pad width direction means a case where the fiber orientation ratio in the pad width direction exceeds approximately 80%.

  The diffusion sheet 30 may be a sheet in which a number of high-density regions are formed along the pad width direction and at intervals in the pad longitudinal direction. In the high-density region, since the fibers are densely present, the fibers are easily diffused by capillary action. For this reason, urine that has penetrated into the diffusion sheet 30 from the concave groove 22 is likely to diffuse along the high-density region oriented along the pad width direction, and is easily absorbed by the absorber 4 on both sides of the concave groove 22. .

  The diffusion sheet 30 is provided in a range including at least the concave groove 22. Preferably, as shown in FIG. 18, it is provided in a range including the absorber penetrating portion 20. The edge in the pad width direction may be formed up to a position extending to the edge in the width direction of the absorber 4, but in order to prevent leakage of urine from both sides, the edge in the width direction of the absorber 4 Is good.

  As shown in FIG. 19, the diffusion sheet 30 may be disposed between the encapsulating sheet 5 and the liquid-impermeable back sheet 2, and although not shown, the absorber 4 and the absorber 4 You may arrange | position between the covering sheets 5 which cover the non-skin side.

  In this incontinence pad 1, since the concave groove 22 is provided in the absorber penetration part 20, the absorber does not intervene at the bottom of the concave groove 22, and accordingly, the diffusion in the longitudinal direction of the groove is accelerated. Have. If the urine diffused along the longitudinal direction of the groove is easily diffused in the groove width direction by combining the diffusion sheet 30, the urine is absorbed in a wide range of the absorbent body 4, and the absorbent body. The absorption capacity of 4 can be utilized to the maximum.

  The concave groove 22 can be arranged in various forms. As shown in FIG. 1, the concave groove 22 is preferably formed in the middle of the longitudinal direction in the center portion in the pad width direction corresponding to the urine discharge site H, but only one line is formed in FIG. As shown in A) and (B), a plurality of strips may be formed spaced apart in the pad width direction, or as shown in FIG. You may form in a shape. When a plurality of strips are formed, the urine diffusion effect can be more reliably enhanced even when a large amount of urine is discharged at once. Moreover, when it forms in a discontinuous line shape, the crushing when the ditch | groove 22 receives external forces, such as leg pressure, from the width direction both sides can be prevented more reliably. When a plurality of strips are formed apart in the pad width direction, the even strips shown in FIG. 20 (A) or the odd strips shown in FIG. 20 (B) may be used.

  Further, the planar shape of the concave groove 22 may be formed with an equal width along the longitudinal direction of the pad as shown in FIG. 1, or may be formed with a different groove width as shown in FIG. Also good. In FIG. 21A, a widened portion 22a having an enlarged groove width is provided at the front end portion of the concave groove 22 in the pad longitudinal direction. By providing the widened portion 22a, a temporary storage space for urine can be expanded, and even when a large amount of urine is dripped at a time such as urge incontinence, the urine can be reliably received by the groove 22 It becomes. The widened portion 22a may be provided at the end portion on the rear side of the pad as shown in FIG. 21B, or may be provided at the front and rear end portions as shown in FIG. 21C.

  The concave groove 22 may be provided with one or a plurality of branch portions 22b and 22c as shown in FIG. By providing the branch portions 22b and 22c, the urine temporarily stored in the concave groove 22 is diffused along the concave groove 22 to a wide area of the absorbent body 4, and the urine is spread over a wider area of the absorbent body 4. Can absorb. In the example shown in FIGS. 22 (A) to 22 (C), the branching portion 22b extends outward from both side edges of the groove 22 on the front side, the rear side, or the front side and the rear side in the pad longitudinal direction, There are provided a plurality of inclining toward the end in the longitudinal direction of the pad, three each on the left and right in the illustrated example. Further, in the example shown in FIGS. 22D to 22F, as the branching portion 22c, a plurality of concave grooves 22 are radially formed at the front end, the rear end, or the front end and the rear end in the pad longitudinal direction. In the example shown, the one that is branched into five is provided.

  In addition, when providing the said absorber recessed part 20 in the formation planned part of the recessed groove 22 of the absorber 4 previously, the absorber recessed part 20 is provided along the shape of the said recessed groove 22.

  DESCRIPTION OF SYMBOLS 1 ... Incontinence pad, 2 ... Liquid impervious back sheet, 3 * 3A * 3B * 3C * 3D * 3E ... Liquid permeable surface sheet, 4 ... Absorber, 5 ... Encapsulated sheet, 7 ... Side nonwoven fabric, 8 ... Superabsorbent polymer, 10 ... inner three-dimensional gather, 11 ... outer three-dimensional gather, 12.13 ... thread-like elastic elastic member, 20 ... absorber penetrating portion, 21 ... embossed portion, 22 ... concave groove, 30 ... diffusion sheet

Claims (5)

In the absorbent article in which an absorbent body is interposed between the liquid-permeable top sheet and the back sheet,
The absorbent body is provided with an absorbent body penetrating portion that penetrates in the thickness direction over the longitudinal range including the urine discharge site along the longitudinal direction of the absorbent article,
By embossing the absorbent body penetrating portion along the absorbent body penetrating portion from the surface side of the liquid permeable surface sheet in a state where the liquid permeable top sheet is laminated on the absorbent body, the absorbent body A concave groove in which at least the liquid-permeable topsheet and the backsheet are integrated in the penetrating portion is formed along the longitudinal direction,
The liquid-permeable surface sheet is a corrugated sheet in which convex portions and concave portions extending in the longitudinal direction of the absorbent article are alternately and repeatedly formed in the width direction of the absorbent article, and in the state where the concave grooves are formed, An absorbent article, wherein the wave-like cross section of the liquid-permeable surface sheet is maintained inside the concave groove. In the bottom of the groove, at least the liquid-permeable topsheet and the backsheet and are bonded by adhesives, absorbent article according to claim 1 Symbol placement are joined by pin-embossing or dot Embossed. The absorbent article according to claim 1 , wherein a sheet for diffusion in the width direction is interposed between the absorber and the back sheet so as to straddle the concave groove on both sides in the width direction. The absorbent article according to claim 3 , wherein the diffusion sheet is a sheet in which fibers are oriented along the width direction of the absorbent article. The diffusion sheet is absorbent with along the width direction of the article, the absorbent absorbent article according to claim 3, wherein a number of high-density regions with an interval in the longitudinal direction is a sheet formed article.

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