JP6657503B2 - Pants-type absorbent article - Google Patents

Description

  The present invention relates to a pants-type absorbent article in which the problem of sagging of an absorber in a crotch region is improved.

  Conventionally, pants-type disposable diapers (pants-type absorbent articles) have been used to absorb excrement of infants, adults, and sick people. The pants-type absorbent article has a waist opening and a pair of leg openings, and has an absorbent body that absorbs excrement and an outer body that is a supporting member thereof, and the absorbent body is worn by the wearer from front and rear. The crotch is covered. Then, the wearer's feet are put into the leg openings, and the disposable diaper body is pulled up around the waist and worn. Here, in the conventional pants-type absorbent article, since the absorbent body is arranged from the waist to the crotch region, the absorbent body swells after urination, and weight is added downward, so that the absorbent body in the crotch region hangs down. In some cases, a gap may be formed between the absorbent article and the pants-type absorbent article, and the formation of such a gap has caused leakage of excrement. In addition, when the absorbent body in the crotch region hangs down, the weight may be felt when walking, or the pants-type absorbent article may unnecessarily interfere with the crotch portion and the wearer may feel difficult to move. This leads to discomfort when wearing pants-type absorbent articles.

  Here, as an invention addressing the problem of slippage when the pants-type absorbent article is worn, Patent Document 1 discloses a waist opening and a pair of left and right leg openings including an exterior body and an absorbent body. A pants-type absorbent article having a portion formed thereon, wherein the exterior body includes a first elastic member extending from the right edge of the abdomen to the left edge of the back through the crotch region; A second elastic member extending from the left edge of the abdominal portion to the right edge of the back portion through the crotch region so as to intersect the first elastic member at the crotch portion; There is disclosed a pants-type absorbent article in which a third elastic member which is positioned between the first elastic member and the first elastic member and which overlaps the second elastic member at both ends is disposed.

  Further, as an invention aimed at reducing the discomfort or the like when wearing a pants-type absorbent article, Patent Literature 2 discloses an absorbent body and an exterior body integrally provided on an outer surface side thereof. In the pants-type absorbent article in which the waist opening and the pair of left and right legs are formed, the thickness of the absorber in the front region and / or the rear region is larger than the thickness of the absorber in the crotch region of the absorbent main body. A pants-type absorbent article characterized by being formed thin is disclosed.

JP-A-09-313531 JP 2006-280468 A

  However, the invention of Patent Literature 1 is an invention that attempts to solve the problem of slippage when the pants-type absorbent article is worn only by disposing a predetermined elastic member. When the problem of the sagging of the absorber in the crotch region is to be solved by adopting the configuration, the tension of the elastic members of the waist portion and the leg portions becomes excessive, and there is a possibility that the wearer may be stressed. Further, also in the invention of Patent Document 2, even if the thickness of the absorber in the front region and / or the rear region is formed to be thin, depending on the weight of the absorber in the crotch region of the thick absorbent main body, the descent of the crotch region may occur. It could have happened.

  Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to improve the problem of sagging of the absorber in the crotch region without excessively increasing the tension of the elastic member in the waist region and the leg. It is an object of the present invention to provide a pants-type absorbent article capable of performing the following.

  In view of the above problems, the inventors of the present invention have conducted intensive studies. As a result, in a pants-type absorbent article having an absorbent body and an outer body, a front region absorber and a rear region absorber are arranged in a front region and a rear region of the absorbent body, respectively, and in the crotch region, The above problem can be solved by arranging and fixing an absorbent sheet that bridges the front region absorber and the rear region absorber, and arranging a predetermined curved elastic member in the front region, the crotch region, and the rear region. And completed the present invention. Specifically, the present invention provides the following.

(1) A first aspect of the present invention is a pants-type absorbent article in which a waist opening is formed in an upper part and leg openings are formed on both sides of a crotch region, and a liquid-permeable topsheet, a liquid An impermeable backsheet, and an absorbent body including an absorber disposed between the topsheet and the backsheet, and an outer shape of the pants-type absorbent article; An outer body made of a body-side interior sheet, wherein the pants-type absorbent article has a front waist region that contacts the abdomen of the wearer, a rear waist region that contacts the back of the wearer, and an absorbent material. And a crotch region in which the main body is disposed, wherein the absorbent main body has a front region, a crotch region, and a rear region, and the front region includes a front region absorber, The rear area absorber is located in the rear area, The front region absorber and the rear region absorber each contain an absorbent fiber and a superabsorbent polymer, and the crotch region has an absorbent sheet member in which the superabsorbent polymer is supported between hydrophilic nonwoven fabrics. Are arranged and fixed by cross-linking the front region absorber and the rear region absorber, and the absorber is divided into the front region absorber, the rear region absorber, and the absorbent sheet member. In the crotch region, a plurality of first bending elastic members are arranged, and the ends of the plurality of first bending elastic members are partially in the front waistline region and the rest is in the front waist region. Each of the plurality of second bending elastic members extends in the rear waist region, and a plurality of second bending elastic members are disposed in the front region and the rear region, respectively. Extending to the area and the rear waist area, It is a Ntsu type absorbent article.

  (2) A second aspect of the present invention is the pants-type absorbent article according to (1), wherein the front region absorber and the rear region absorber are separated by 10 mm or more and 30 mm or less. Is what you do.

  (3) A third aspect of the present invention is the pants-type absorbent article according to (1) or (2), wherein in the absorbent sheet member, the superabsorbent polymer has at least two hydrophilic polymers. Characterized by being supported by a hot melt adhesive between conductive nonwoven fabrics.

  (4) A fourth aspect of the present invention is the pants-type absorbent article according to any one of (1) to (3), wherein the absorbent sheet member is provided on the body side of the absorbent body and the absorbent body. It is characterized by being arranged on the exterior body side of the body or between the above-mentioned absorbers.

  (5) A fifth aspect of the present invention is the pants-type absorbent article according to any one of (1) to (4), wherein the longitudinal dimension of the absorbent sheet member is 50 mm or more and 90 mm or less. In this case, the width dimension is 20 mm or more and 50 mm or less.

  In the present invention, an absorbent sheet member in which a superabsorbent polymer is carried between hydrophilic nonwoven fabrics is disposed in the crotch region of the absorbent main body, and the absorbent sheet member includes a front region absorber and a rear region absorber. And are arranged and fixed. For this reason, the amount of the bodily fluid absorbed and retained in the crotch region is reduced, and the bodily fluid absorbed by the absorbent sheet member is diffused and absorbed into the front region absorber and the rear region absorber through the bridge portion. Thus, the excreted body fluid is prevented from being concentrated and staying in the crotch region. Therefore, it is possible to prevent the absorber in the crotch region from hanging down due to the weight. Furthermore, since each of the crotch region, the front region, and the rear region is supported by an elastic member that also extends to the front waist region and the rear waist region, the tension of the elastic members of the waist region and the legs is excessive. Without doing this, it is possible to improve the fit of the pants-type absorbent article, and as a result, it is possible to further prevent the problem of the absorbent body in the crotch region hanging down.

It is a perspective view of a pants type absorbent article of the present invention. It is a development view of a pants type absorbent article of the present invention. It is a figure showing arrangement of an absorber in a pants type absorbent article of the present invention. It is a figure showing composition of an absorptive sheet member in a pants type absorbent article of the present invention.

  Hereinafter, the pants-type absorbent article 1 according to the embodiment of the present invention will be described. Note that the position on the abdomen of the wearer when the pants-type absorbent article 1 is worn is referred to as “front” or “front”, and the position on the back of the wearer is “rear” or “rear”. Name. In addition, the surface that becomes the skin side of the wearer when the pants-type absorbent article 1 is worn is referred to as “inside”.

<Pants type absorbent article>
FIG. 1 is a perspective view of the pants-type absorbent article 1 of the present invention, and FIG. 2 is a developed view of the pants-type absorbent article 1 of the present invention. The pants-type absorbent article 1 has an absorbent main body 20 that is elongated in the front-rear direction and covers the crotch part of the wearer from front to rear. And an exterior body 30 constituting the outer shape of the absorbent article 1. As shown in FIG. 1, the pants-type absorbent article 1 whose outer shape is constituted by the exterior body 30 has a waist opening 11 formed on the upper part and leg openings 12 formed on both sides of the crotch region 14. It is roughly divided into a front waist region 13 that contacts the abdomen of the wearer, a rear waist region 15 that contacts the back of the wearer, and a crotch region 14 where the absorbent body 20 is disposed.

[Absorbent body]
As shown in FIG. 2, the absorbent body 20 includes a liquid-permeable top sheet 24, a liquid-impermeable back sheet 25, and an absorber 29 disposed between the top sheet 24 and the back sheet 25. It is divided into a front region 21 in contact with the abdomen of the wearer, a crotch region 22 in contact with the crotch of the wearer, and a rear region 23 in contact with the back of the wearer.

(Top sheet)
The top sheet 24 may be formed from a substrate having a liquid permeability such that the bodily fluid moves to the absorber. For example, a non-woven fabric such as a thermal bond non-woven fabric or a spun bond non-woven fabric, or a thermal bond / spun bond is laminated. It is composed of a material that has a soft touch and does not irritate the skin, such as a hydrophilic nonwoven material such as a composite nonwoven fabric. Further, the top sheet 24 may be subjected to embossing or perforation on the surface in order to improve the liquid permeability. As a method for performing the embossing or the perforation, a known method can be implemented without limitation. Further, in order to reduce irritation to the skin, the topsheet 24 may contain a lotion, an antioxidant, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a humectant, and the like. Further, from the viewpoint of strength and workability, the basis weight of the top sheet 24 is preferably 18 g / m ² or more and 40 g / m ² or less. There is no particular limitation on the shape of the top sheet 24, but any shape may be used as long as it covers the absorber 29, which is necessary to guide the body fluid to the absorber 29 without leakage.

(Back sheet)
The back sheet 25 may be formed using a base material having a liquid impermeability so that the body fluid held by the absorber 29 does not wet clothes, and is formed from a breathable or non-breathable resin film. You. Here, examples of the resin film that can be used include polyester, polyvinyl alcohol, polyethylene, polypropylene, and a composite film of polyethylene and polypropylene. From the viewpoint of strength and workability, the basis weight of the back sheet 25 is preferably 15 g / m ² or more and 40 g / m ² or less. It is preferable to use a resin film having air permeability as the back sheet 25 in order to prevent stuffiness at the time of mounting. In order to provide the back sheet 25 with air permeability, for example, a filler may be mixed into the resin film of the base material, or the back sheet 25 may be embossed. In addition, calcium carbonate can be mentioned as a filler, and the compounding method can be performed without limitation by a known method.

(Absorber)
The absorbent main body 20 has an absorber 29 disposed between the top sheet 24 and the back sheet 25. In the present invention, the absorber 29 has a front region absorber 26 arranged in the front region 21 and a rear region absorber 28 arranged in the rear region 23, and is further arranged in the crotch region 22; It has an absorbent sheet member 27 fixed in a state where the front region absorber 26 and the rear region absorber 28 are cross-linked and arranged. Since the absorber 29 is divided into a front region absorber 26, a rear region absorber 28, and an absorbent sheet member 27, which will be described later, the absorbent member 29 is disposed in the crotch region 22 and has no absorbent fiber. The body fluid absorbed by the permeable sheet member 27 can be diffused and absorbed by the front region absorber 26 and the rear region absorber 28, and the body fluid retained by the absorber 29 concentrates and stays in the crotch region 22. Is suppressed. Thereby, the amount of the bodily fluid held in the crotch region 22 is reduced, and the weight of the absorber 29 in the crotch region 22 can prevent the absorber 29 in the crotch region 22 from hanging down.

((Front area absorber and rear area absorber))
Each of the front region absorber 26 and the rear region absorber 28 contains an absorbent fiber as a base material and a superabsorbent polymer (SAP). The absorbent fiber is not particularly limited as long as it is generally used for absorbent articles such as sanitary napkins, diapers, and urine absorbing pads, and examples thereof include fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, and hydrophilic paper. And non-woven fabrics. Among these, it is preferable to use fluff pulp from the viewpoint of absorbability. Examples of such fluff pulp include wood pulp, synthetic fiber, polymer fiber, non-wood pulp, and the like that are defibrated into cotton. It is preferable that the absorbent fibers of the front region absorber 26 and the rear region absorber 28 have a basis weight of 100 g / m ² or more and 800 g / m ² or less so as not to impair absorption performance and feel.

The superabsorbent polymer of the front region absorber 26 and the rear region absorber 28 is not particularly limited as long as it can absorb bodily fluids and prevent backflow, and may be a sodium polyacrylate-based or polyaspartate-based polymer. , (Starch-acrylic acid) graft copolymers, (acrylic acid-vinyl alcohol) copolymers, (isobutylene-maleic anhydride) copolymers and their saponified products. it can. Among these, sodium polyacrylate is preferred from the viewpoint of the amount of absorption per weight. The SAP amount of the front region absorber 26 and the rear region absorber 28 is preferably set to a basis weight of 50 g / m ² or more and 500 g / m ² or less so as not to impair absorption performance and feel, and 15 mass% or more and 50 mass or less. % Is preferable.

  In the front region absorber 26 and the rear region absorber 28, the form of the absorbent fiber and the SAP is preferably a laminated mat formed by mixing SAP particles into the absorbent fiber. For the purpose of preventing SAP particles from leaking and stabilizing the shapes of the front region absorber 26 and the rear region absorber 28, the front region absorber 26 and the rear region absorber 28 are preferably wrapped in a carrier sheet. The substrate of the carrier sheet may be any material having hydrophilicity, and examples thereof include hydrophilic nonwoven fabrics such as tissues, absorbent papers, and airlaid nonwoven fabrics. When a plurality of carrier sheets are provided, the base materials of the carrier sheets may be the same or different.

  In FIG. 3, the front region absorber 26 and the rear region absorber 28 are composed of an upper layer absorber (front region upper layer absorber 261 and rear region upper layer absorber 281) and a lower layer absorber (front region lower layer absorber 262 and rear region lower layer). It is preferred to be formed by laminating the absorber 282). In this case, the size of the upper absorber and the lower absorber in the longitudinal direction and the width direction may be such that the size of the upper absorber is larger than the size of the lower absorber, and the size of the upper absorber is the same as the size of the lower absorber. And the size of the upper absorber may be smaller than the size of the lower absorber.

  In the present invention, it is preferable that the front region absorber 26 and the rear region absorber 28 are separated by 10 mm or more and 30 mm or less. Since the front region absorber 26 and the rear region absorber 28 are separated by such a distance, the bodily fluid absorbed by the absorbent sheet member 27 of the crotch region 22 can be quickly absorbed by the front region absorber 26 and the rear region. It is possible to ensure that the body fluid is absorbed and diffused in the region absorber 28 and that the weight of the bodily fluid absorbed by the absorber 29 is excessively concentrated in the crotch region 22.

((Absorbent sheet member))
FIG. 3 is a drawing showing an arrangement of the absorbent body 29 in the pants-type absorbent article 1 of the present invention as viewed from a longitudinal section, and FIG. 4 is an absorbent sheet member in the pants-type absorbent article 1 of the present invention. 27 is a diagram showing a configuration as viewed from a cross section in the width direction of No. 27. In the present invention, as shown in FIG. 4, the absorbent sheet member 27 provided in the crotch region 22 has the superabsorbent polymer 276 carried between the hydrophilic nonwoven fabrics (the upper hydrophilic nonwoven fabric 271 and the lower hydrophilic nonwoven fabric 275). It was done. Since the amount of body fluid that can be retained in such an absorbent sheet member 27 is limited, arranging the absorbent sheet member 27 in the crotch region 22 prevents the bodily fluid from being concentrated in the crotch region 22. The body fluid absorbed by the absorbent sheet member 27 can also be avoided and diffused into the front region absorber 26 and the rear region absorber 28 via a bridge between the front region absorber 26 and the rear region absorber 28. Is absorbed. In the present invention, as shown in FIG. 4, an intermediate hydrophilic nonwoven fabric 273 is further provided between the upper hydrophilic nonwoven fabric 271 and the lower hydrophilic nonwoven fabric 275, and the upper hydrophilic nonwoven fabric 271 and the intermediate hydrophilic nonwoven fabric 271 are provided. The structure may be such that the superabsorbent polymer 276 is supported between the hydrophilic nonwoven fabric 273 and between the intermediate hydrophilic nonwoven fabric 273 and the lower hydrophilic nonwoven fabric 275. Hereinafter, in the present specification, as an example, with reference to FIG. 4B, the absorbent sheet member 27 has an upper hydrophilic nonwoven fabric 271, an intermediate hydrophilic nonwoven fabric 273, and a lower hydrophilic nonwoven fabric 275, The superabsorbent polymer 276 (the primary water-absorbing layer 272 and the secondary water-absorbing layer 274) is provided between the upper hydrophilic nonwoven fabric 271 and the intermediate hydrophilic nonwoven fabric 273 and between the intermediate hydrophilic nonwoven fabric 273 and the lower hydrophilic nonwoven fabric 275. The mode of being carried will be described.

  The primary water-absorbing layer 272 and the secondary water-absorbing layer 274 include a super-water-absorbing polymer and a hot-melt adhesive, and the hot-melt adhesive causes the upper hydrophilic nonwoven fabric 271, the primary water-absorbing layer 272, and the intermediate hydrophilic layer. The nonwoven fabric 273, the secondary water absorbing layer 274, and the lower hydrophilic nonwoven fabric 275 are bonded to each other.

  Here, as an index of the absorption rate of the superabsorbent polymer, there is an absorption rate of physiological saline by the Vortex method. This is done by adding 50 mL of physiological saline to a 100 mL beaker containing a rotor, stirring the mixture at 600 rpm using a magnetic stirrer, precisely weighing 2.000 g of the superabsorbent polymer, and throwing it into a vortex. The time measurement is started later with a stopwatch and the time until the rotor of the magnetic stirrer stops is measured. The smaller the measured value, the faster the absorption speed.

  The absorption rate of physiological saline by the Vortex method of the superabsorbent polymer A used for the primary water-absorbing layer 272 (water-absorbing layer sandwiched between the upper hydrophilic nonwoven fabric 271 and the intermediate hydrophilic nonwoven fabric 273) is determined by an absorbent sheet member. From the viewpoint of speeding up the absorption rate of the bodily fluid by the 27 and avoiding stagnation of the bodily fluid in the primary water absorbing layer 272, and quickly diffusing the bodily fluid to the front, rear, left and right and the lower secondary water absorbing layer 274, 30 seconds to 70 seconds are preferable. , 35 to 60 seconds, more preferably 35 to 55 seconds.

  The superabsorbent polymer contained in the secondary water-absorbing layer 274 (the water-absorbing layer sandwiched between the intermediate hydrophilic nonwoven fabric 273 and the lower hydrophilic nonwoven fabric 275) quickly removes the body fluid that could not be absorbed by the primary water-absorbing layer 272. Has the role of absorbing and retaining. For that purpose, it is preferable to use a superabsorbent polymer having a high absorption rate. The absorption rate of physiological saline by the Vortex method of the superabsorbent polymer B contained in the secondary water absorbing layer 274 is preferably 1 second to 30 seconds, more preferably 2 seconds to 25 seconds, and further preferably 3 seconds to 20 seconds. preferable.

  The value obtained by subtracting the absorption rate of the superabsorbent polymer B contained in the secondary water-absorbing layer 274 from the absorption rate of the superabsorbent polymer A used in the primary water-absorbing layer 272 is a positive value. Is larger, the stagnation of the bodily fluid in the primary water absorbing layer 272 is avoided, and the bodily fluid is more efficiently held in the secondary water absorbing layer 274. Specifically, the difference is preferably 10 seconds or more, more preferably 15 seconds or more, and even more preferably 20 seconds or more.

  The median particle size of the superabsorbent polymer used for the absorbent sheet member 27 is preferably from 100 μm to 600 μm, more preferably from 200 μm to 500 μm. By setting the median particle size of the superabsorbent polymer within the above range, it is possible to avoid the use of fine powder having poor fluidity and to improve the basic performance of the absorbent sheet member 27, It is possible to prevent the sheet member 27 from becoming stiff and reduce the rugged feeling, thereby improving the tactile sensation.

The total content of the superabsorbent polymer (including the primary water-absorbing layer 272 and the secondary water-absorbing layer 274) contained in the absorbent sheet member 27 can be appropriately set according to the required absorption performance. , Preferably 100 g / m ² or more and 1000 g / m ² or less, more preferably 200 g / m ² or more and 800 g / m ² or less, further preferably 250 g / m ² or more and 600 g / m ² or less. . By setting the content of the superabsorbent polymer within the range of the numerical value, in addition to exhibiting sufficient absorption performance, a smooth feeling after body fluid absorption is maintained, and it can be molded into an ultra-thin shape, It is possible to provide the absorbent sheet member 27 that is soft and easy to move and has a feeling of wearing.

  When the superabsorbent polymer is provided separately in the primary water absorbing layer 272 and the secondary water absorbing layer 274, the superabsorbent polymer A in the primary water absorbing layer 272 and the superabsorbent polymer B in the secondary water absorbing layer 274 are provided. Is preferably such that the value of (superabsorbent polymer A in primary water absorbing layer 272) / (superabsorbent polymer B in secondary water absorbing layer 274) is 98/2 or more and 50/50 or less. By setting the content ratio of the superabsorbent polymer contained in the primary water-absorbing layer 272 and the secondary water-absorbing layer 274 to be within the above range, the secondary water-absorbing layer 274 can fully exhibit its absorbency, and Liquid return of the water absorbing layer 272 can be reduced.

  As the superabsorbent polymer, known polymers such as polyacrylic acid-based, starch-based, and cellulose-based polymers can be used. Basically, those used for the front region absorber 26 and the rear region absorber 28 And the like can be used.

  Examples of the hot melt adhesive that can be used for bonding the hydrophilic nonwoven fabric and the superabsorbent polymer include a styrene-butadiene-styrene-based copolymer and a styrene-isoprene-styrene having a melting point of about 100 to 180 ° C. A synthetic rubber-based adhesive such as a copolymer or an olefin-based adhesive such as an ethylene-vinyl acetate copolymer can be used. As a method for applying the hot melt adhesive, a known method such as a curtain coating method for applying a hot melt adhesive in a molten state from a nozzle in a non-contact manner, a spiral method, a slot method for applying a contact method, and the like can be used. .

  In the present invention, the absorbent sheet member 27 in which the upper hydrophilic nonwoven fabric 271, the primary water absorbing layer 272, the intermediate hydrophilic nonwoven fabric 273, the secondary water absorbing layer 274, and the lower hydrophilic nonwoven fabric 275 are integrated by a hot melt adhesive. It is preferable to perform hot embossing on the whole. Thereby, the efficiency of diffusion of the bodily fluid to the entire absorbent sheet member 27 can be increased, and the fixation of the superabsorbent polymer in the absorbent sheet member 27 is strengthened. The embossed shape is not particularly limited, such as a straight line, a curved line, and a dot shape. The embossed pattern is appropriately selected from a lattice, a wavy shape, an acorn pattern (a continuous shape of an acorn), etc. for efficiently diffusing body fluids. Is done.

The upper hydrophilic nonwoven fabric 271, the lower hydrophilic nonwoven fabric 275, and the intermediate hydrophilic nonwoven fabric 273 constituting the absorbent sheet member 27 can be used as long as they are 20 g / m ² or more. It is preferably a spun lace nonwoven fabric which retains water and temporarily retains liquid by itself, and more preferably the lower hydrophilic nonwoven fabric 275 is a spunlace nonwoven fabric. As the spun lace non-woven fabric, a non-woven fabric such as rayon or cotton-based cellulose and synthetic fiber-based non-woven fabric can be used, and the basis weight thereof can be appropriately selected, but is preferably 20 g / m ² or more. Other than the spun-lace nonwoven fabric, an air-through nonwoven fabric, a point-bonded nonwoven fabric, and a spun-bonded nonwoven fabric made of a synthetic fiber such as polypropylene, polyethylene, and polyester can be used. In the present invention, it is particularly preferable to use an air-through nonwoven fabric which is excellent in preventing liquid return.

  It is preferable that the shape of the absorbent sheet member 27 be substantially rectangular, and four corners be arced in order to prevent the skin from being damaged at the corners.

  As shown in FIG. 3, the absorbent sheet member 27 may be disposed on the body side of the front region absorber 26 and the rear region absorber 28 (FIG. 3B), and the front region absorber 26 and the rear region are used. It may be arranged on the exterior body 30 side of the absorber 28 (FIG. 3C), between the front upper absorber 261 and the front lower absorber 262 and between the rear upper absorber 281 and the rear lower absorber. 282 (FIG. 3A). When the front region absorber 26 and the rear region absorber 28 are joined to the absorbent sheet member 27, the absorbent sheet member 27 is bonded to the front region absorber 26 using a hot melt adhesive or the like. It is fixed to the rear absorber 28. By doing so, the bodily fluid is reliably diffused from the absorbent sheet member 27 to the front region absorber 26 and the rear region absorber 28.

  The absorbent sheet member 27 preferably has a longitudinal dimension of 50 mm or more and 90 mm or less, and a width dimension of 20 mm or more and 50 mm or less. By setting the size of the absorbent sheet member 27 within the above range, it is possible to quickly absorb the body fluid excreted in the crotch region 22 and prevent the absorbed body fluid from remaining in the crotch region 22 in a large amount. can do.

[Outer body]
The exterior body 30 constitutes the outer shape of the pants-type absorbent article 1, and includes an exterior sheet 301 forming the waist opening 11 and the leg openings 12, and an interior sheet 302 on the body side of the exterior sheet.

(Exterior sheet and interior sheet)
The exterior sheet 301 has a front waistline region 13 and a rear waistline region 15 that are substantially symmetrical about a centerline serving as a crotch portion, and the absorbent main body 20 is also arranged substantially symmetrically about the centerline. . Then, the exterior sheet 301 (and the absorbent main body 20) is folded in two at the center line so that the absorbent main body 20 is on the inside, and both side edges of the front waistline region 13 and the rear waistline region 15 have overlapping portions. Connected. Thereby, the exterior sheet 301 forms the stretchable waist opening 11 and the pair of leg openings 12 to configure the pants-type absorbent article 1 as a detachable pants-like shape as a whole. When the pants-type absorbent article 1 is worn, the abdomen covers the waist and the crotch on the wearer's abdomen, and the back covers the waist and the crotch on the wearer's back. .

An interior sheet 302 is laminated inside the exterior sheet 301 so as to increase the strength of the exterior body 30. In addition to the exterior sheet 301 and the interior sheet 302, an auxiliary sheet that covers the periphery of the absorbent main body 20 is provided on the exterior body 30, and this may be laminated on the interior sheet 302. For the exterior sheet 301 and the interior sheet 302, a nonwoven fabric such as a thermal bond nonwoven fabric or a spun bond nonwoven fabric, and a nonwoven fabric made of a thermoplastic resin such as polypropylene, polyester, or polyethylene can be used. When these nonwoven fabrics are used, the basis weight may be 18 g / m ² or more and 40 g / m ² or less.

[First bending elastic member and second bending elastic member]
In the pants-type absorbent article 1 of the present invention, a first curved elastic member 31 and a second curved elastic member 32 are arranged from the front waistline region 13 and the rear waistline region 15 toward the crotch region 14. . More specifically, a plurality of first curved elastic members 31 are disposed in the crotch region 22 of the absorbent main body 20 in which the absorbent sheet member 27 is disposed, and a part of the first curved elastic members 31 is partially disposed in the front waist region 13. The rest extends to the rear waistline region 15 and the front region 21 of the absorbent body 20 in which the front region absorber 26 is disposed and the rear region of the absorbent body 20 in which the rear region absorber 28 is disposed. 23, a plurality of second bending elastic members 32 are arranged. The second bending elastic members 32 arranged in the front region 21 extend to the front waist region 13 and are arranged in the rear region 23. The second curved elastic member 32 extends to the rear waistline region 15. As described above, by disposing the elastic members extending to the front waistline region 13 or the rear waistline region 15 in the crotch region 22, the front region 21, and the rear region 23, the absorbent sheet member 27, the front region absorber 26 and the rear region absorber 28 are each supported by an elastic member, which improves the fit of the pants-type absorbent article 1 and effectively prevents the absorber in the crotch region 22 from sagging. Since the structure in which the member is supported from the front waist region 13 and the rear waist region 15 is employed, it is possible to prevent stress on the wearer due to excessive tightening of the legs and waist. As the elastic members constituting the first curved elastic member 31 and the second curved elastic member 32, for example, a polyurethane thread, a strip-shaped polyurethane film, a thread-shaped or strip-shaped natural rubber, or the like can be used. The first curved elastic member 31 disposed in the region 22 may pass through the edge of the exterior body 30 forming the leg opening 12 and may constitute a leg gather of the pants-type absorbent article 1.

DESCRIPTION OF SYMBOLS 1 Pants-type absorbent article 11 Waist opening 12 Leg opening 13 Front waist area 14 Crotch area 15 Rear waist area 20 Absorbent body 21 Front area 22 Inseam area 23 Back area 24 Top sheet 25 Back sheet 26 Front area absorber 261 Front area upper layer absorber 262 Front area lower layer absorber 27 Absorbent sheet member 271 Upper layer hydrophilic nonwoven fabric 272 Primary water absorbing layer 273 Intermediate layer hydrophilic nonwoven fabric 274 Secondary water absorbing layer 275 Lower layer hydrophilic nonwoven fabric 276 High water absorbing polymer 28 Back Area absorber 281 rear area upper layer absorber 282 rear area lower layer absorber 29 absorber 30 exterior body 301 exterior sheet 302 interior sheet 31 first curved elastic member 32 second curved elastic member

Claims (5)

A pants-type absorbent article having a waist opening formed at an upper portion and leg openings formed on both sides of a crotch region,
A liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body including an absorber disposed between the topsheet and the backsheet,
Comprising an exterior sheet and an exterior body comprising an interior sheet on the body side of the exterior sheet, which constitutes the outer shape of the pants-type absorbent article,
The pants-type absorbent article has a front waist region in contact with the abdomen of the wearer, a rear waist region in contact with the back of the wearer, and a crotch region in which the absorbent main body is arranged,
The absorbent body has a front region, a crotch region, and a rear region,
In the front area, a front area absorber is arranged, and in the rear area, a rear area absorber is arranged, and the front area absorber and the rear area absorber are an absorbent fiber and a high water absorbent, respectively. Containing a conductive polymer,
In the crotch region, an absorbent sheet member in which a superabsorbent polymer is supported between hydrophilic nonwoven fabrics is fixed by being arranged by cross-linking the front region absorber and the rear region absorber,
The absorber is divided into the front region absorber, the rear region absorber, and the absorbent sheet member,
In the crotch region, a plurality of first bending elastic members are arranged, and ends of the plurality of first bending elastic members are partially in the front waist region and the remaining portions are in the rear waist region. Each extend,
A plurality of second bending elastic members are arranged in the front region and the rear region, and ends of the plurality of second bending elastic members extend to the front waist region and the rear waist region, respectively. Existing pants-type absorbent articles.   The pants-type absorbent article according to claim 1, wherein the front region absorber and the rear region absorber are separated by 10 mm or more and 30 mm or less.   3. The pants-type absorbent article according to claim 1, wherein in the absorbent sheet member, the superabsorbent polymer is carried between at least two sheets of hydrophilic nonwoven fabric by a hot melt adhesive. 4.   The pants-type absorbent article according to any one of claims 1 to 3, wherein the absorbent sheet member is disposed on the body side of the absorbent body, the exterior body side of the absorbent body, or between the absorbent bodies.   The pants-type absorbent article according to any one of claims 1 to 4, wherein a length in the longitudinal direction of the absorbent sheet member is 50 mm or more and 90 mm or less, and a dimension in the width direction is 20 mm or more and 50 mm or less.

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