JP6604800B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as incontinence pads, disposable diapers and sanitary napkins for absorbing urine, menstrual blood, and the like. And an absorbent article in which grooves are formed.

  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.

  However, in the case of people with stress incontinence, the amount of urine that appears at one time is small, and water is absorbed only in the urination area and its surroundings. May be absorbed repeatedly. At this time, there is a problem that the superabsorbent resin only in the center part of the product swells and the feeling of wearing is deteriorated by absorbing it in the same part little by little.

  Moreover, in the following patent document 1, the upper absorbent layer having a fiber assembly layer in which an opening is formed at a position facing the crotch portion of the wearer, and the upper absorbent layer and the back sheet are disposed between the upper absorbent layer and the back sheet. An absorbent sheet that covers the lower side of the sheet, and the absorbent sheet comprises two sheets and a superabsorbent material, and the density of the superabsorbent material is lower than that of the surroundings or the low density is not present. An absorbent article is disclosed in which a region continuously extends linearly or in a mesh shape along a longitudinal direction from a position overlapping the opening.

  In the following Patent Document 2, it is divided into a first absorbent part located at the center in the longitudinal direction, a second absorbent part and a third absorbent part extending in the front-rear direction, and the basis weight of the polymer of the second absorbent part is third. It is higher than the absorber, the first recess is formed in the first absorber, its end does not reach the absorber side edge, and the extending direction is oriented in the longitudinal direction of the absorber, and the second absorption An absorbent article is disclosed in which a second recess that is continuous from the first recess and extends in the longitudinal direction of the absorber is formed on the surface of the portion.

  Furthermore, in the following Patent Document 3, as an absorption unit, an absorbent zone formed by a nonwoven fabric base material, a plurality of superabsorbent layers extending in a strip shape on the surface of the nonwoven fabric base material, and a ventilation zone in which this superabsorbent layer does not exist An incontinence absorbent pad is disclosed.

JP 2011-120710 A JP 2014-14667 A JP 2001-190581 A

  In the absorbent article described in Patent Document 1, a large opening is provided at a position facing the crotch portion of the wearer of the upper absorbent layer, and the surface of the absorbent article does not adhere to the body. When the water is discharged, there is a problem that leakage occurs along the skin. Moreover, in the absorbent article described in Patent Document 2, although a through hole is formed as another form of the first recess, the contact portion with the urine drainage portion is formed almost flat. As a result, the surface of the absorbent article may always be in close contact with the urination part and feel wet. In addition, in the incontinence absorbent pad described in Patent Document 3, since the absorbent unit is made of a highly water-absorbent resin and does not have pulp, there is a risk that the initial water absorption speed is slow and flows too far forward and backward. It was. Further, in the stage before the superabsorbent resin that is absorbed at the first time swells to form the ridge groove structure, there is a possibility that lateral leakage easily occurs in the lateral direction.

  Therefore, a main problem of the present invention is to provide an absorbent article that can obtain a high absorption performance without deteriorating the wearing feeling even when it is repeatedly discharged to the same portion little by little.

In order to solve the above-mentioned problem, as the present invention according to claim 1, in an absorbent article in which an absorbent body mainly composed of pulp and a superabsorbent resin is interposed between a liquid-permeable top sheet and a back sheet,
The absorbent body includes at least a superabsorbent resin arrangement region in which the superabsorbent resin is disposed in a region including the body fluid discharge portion, and a superabsorbent resin non-arrangement region in which the superabsorbent resin is not disposed or The superabsorbent resin low-density region in which the density of the superabsorbent resin is relatively lower than the superabsorbent resin arrangement region extends in a direction along the substantially longitudinal direction of the absorbent article, and the width direction of the absorbent article are alternately arranged in the,
The absorbent body and the liquid-permeable surface sheet are joined together by a streak-shaped adhesive portion along the longitudinal direction at the center in the width direction of the superabsorbent resin arrangement region, There is provided an absorbent article characterized in that it is not bonded in a low density region of the water absorbent resin .

  In the first aspect of the present invention, the superabsorbent resin is swollen by absorbing water, so that the superabsorbent resin arrangement region is more than the superabsorbent resin non-arrangement region or the superabsorbent resin low density region. Due to the high bulge on the skin side, the surface of the absorbent body has absorptive ridges by the superabsorbent resin arrangement region and grooves by the superabsorbent resin non-arrangement region or the superabsorbent resin low density region. While extending in the direction along the substantially longitudinal direction of the article, the article is alternately formed in the width direction of the absorbent article. Therefore, even if there are repeated discharges in the same part little by little, since the body fluid flows back and forth through the groove, it is not concentrated and absorbed in the same place, and it is high without deteriorating the wearing feeling Absorption performance can be obtained. Moreover, since the pulp is present in the high water-absorbing resin non-arranged region or the high water-absorbing resin low-density region, the initial water absorption rate is high, and it is possible to prevent the body fluid from being excessively diffused and leaking. Furthermore, since the part which contacts skin after liquid absorption is a collar part formed by the said highly water-absorbing resin arrangement | positioning area | region, the contact area with skin becomes small and it becomes possible to reduce the discomfort by a wet feeling.

Further, in the present invention, the absorbent body and the liquid-permeable surface sheet are joined together by a streak-shaped adhesive portion along the longitudinal direction at the center in the width direction of the superabsorbent resin arrangement region. By preventing the superabsorbent resin from being bonded in the non-arranged region or the low-density region of the superabsorbent resin, the superabsorbent resin absorbs water and swells, and the superabsorbent polymer disposing region is raised on the skin side. The groove formed by the resin non-arranged region or the low water-absorbent resin low-density region becomes a space where no liquid-permeable surface sheet is interposed, and body fluid easily diffuses through this space.

As the present invention according to claim 2, in an absorbent article in which an absorbent body mainly composed of pulp and a superabsorbent resin is interposed between the liquid-permeable top sheet and the back sheet,
  The absorbent body includes at least a superabsorbent resin arrangement region in which the superabsorbent resin is disposed in a region including the body fluid discharge portion, and a superabsorbent resin non-arrangement region in which the superabsorbent resin is not disposed or The superabsorbent resin low-density region in which the density of the superabsorbent resin is relatively lower than the superabsorbent resin arrangement region extends in a direction along the substantially longitudinal direction of the absorbent article, and the width direction of the absorbent article Alternately arranged
The absorbent body and the liquid-permeable surface sheet are a streak-like adhesive portion along the longitudinal direction of the central portion in the width direction of the superabsorbent resin arrangement region, and the superabsorbent resin non-arrangement region or the superabsorbent resin An absorbent article is provided in which the central portion in the width direction of the low-density region is joined by a streak-like adhesive portion along the longitudinal direction.

In the second aspect of the invention, in addition to the adhesive portion of the superabsorbent resin arrangement region, the absorbent body is similarly formed in the streaky adhesive portion in the superabsorbent resin non-arrangement region or the superabsorbent resin low density region. And the liquid-permeable surface sheet are joined together, so that the liquid-permeable surface sheet is also formed unevenly in conjunction with the formation of the ridge and groove on the skin side of the absorbent body. The contact area becomes smaller and it becomes difficult to feel discomfort due to the wet feeling.

As the present invention according to claim 3 , there is provided the absorbent article according to any one of claims 1 and 2 , wherein the skin side surface of the absorbent body before liquid absorption is formed substantially flat.

In the invention of claim 3 , since the skin side surface of the absorbent body before liquid absorption is formed almost flat, the surface of the absorbent article before liquid absorption can be in close contact with the skin surface, and a small amount of body fluid is discharged. Even in the event of absorption, the absorber can be surely absorbed.

As the present invention according to claim 4, according to the width direction central portion and the super absorbent polymer non-placement area or claim 1-3 or of the super absorbent polymer low density regions are disposed in the absorber An absorbent article is provided.

In the invention of claim 4, by arranging the superabsorbent resin non-arrangement region or the superabsorbent resin low density region in the central portion in the width direction of the absorber, the flange and the groove portion are absorbed by liquid absorption. When formed, the portion in contact with the body fluid discharge portion of the wearer at the center in the width direction becomes a groove portion, which facilitates diffusion of the body fluid repeatedly discharged in the front-rear direction.

As the present invention according to claim 5 , both ends in the longitudinal direction of the absorber are used as the superabsorbent resin arrangement region over the entire width, and the superabsorbent resin non-arrangement region or the superabsorbent resin low density An absorbent article according to any one of claims 1 to 4, wherein no region is disposed.

In the invention according to claim 5, in order to prevent leakage from both ends in the longitudinal direction, both ends in the longitudinal direction of the absorbent body are superabsorbent resin arrangement regions over the entire width, and the superabsorbent resin non-arrangement region is provided. Alternatively, the low density region of the superabsorbent resin is not arranged.

As the present invention according to claim 6, in the super absorbent polymer arranged region, the super absorbent polymer, the absorption of claim 1-5 or which is arranged eccentrically on the skin side of the absorbent body A sex article is provided.

In the invention of claim 6 , the superabsorbent resin is unevenly distributed on the skin side of the absorbent body so that when the superabsorbent resin absorbs water and swells, the superabsorbent resin placement region is on the skin side. It makes it easy to raise.

  As described above in detail, according to the present invention, even when a small amount is repeatedly discharged to the same portion, the wearing feeling is not deteriorated and high absorption performance can be obtained.

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. (A) is the perspective view of the absorber 4 before liquid absorption, (B) is the absorber 4 after liquid absorption. (A)-(C) are the top views of the absorber 4 which concerns on another form example. (A), (B) is a perspective view of the absorber 4 which concerns on another form example. FIG. 2A is a perspective view (No. 1) of the absorbent body 4 after liquid absorption, (A) before liquid absorption, and (B) showing a joined state with the liquid-permeable surface sheet 3. FIG. 3A is a perspective view (No. 2) of the absorbent body 4 after liquid absorption, (A) before liquid absorption, and (B) showing a joined state with the liquid-permeable surface sheet 3. 5 is a cross-sectional view showing a method for manufacturing the absorbent body 4. FIG.

  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 and 2, an incontinence pad 1 according to the present invention includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a liquid-permeable top sheet 3 that allows urine and the like to permeate quickly, and these It is mainly composed of cotton-like pulp or synthetic pulp interposed between both sheets 2 and 3 and an absorbent body 4 mainly composed of a superabsorbent resin, and the liquid impervious around the absorbent body 4 The outer edge portion of the conductive back sheet 2 and the liquid permeable top sheet 3 is joined by an adhesive such as hot melt or an adhesive means such as heat sealing. If necessary, the absorbent body 4 can be surrounded by a wrapping sheet made of crepe paper, nonwoven fabric, or the like in order to maintain the shape of the absorbent body 4 and improve the diffusibility. Side nonwoven fabrics that form a pair of left and right three-dimensional gathers that protrude from the skin side in a predetermined section in the longitudinal direction so as to include at least the urine discharge site H may be provided. A hydrophilic second sheet can be disposed between the liquid-permeable surface sheet 3 and the absorbent body 4.

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 absorbent body 4 is made of, for example, absorbent fibers such as cotton-like pulp and a highly water-absorbent resin. In the illustrated example, the planar shape is a substantially oblong shape that is long in the longitudinal direction of the pad. The superabsorbent resin is, for example, granular powder, and is unevenly distributed in a predetermined region.

Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolved pulp, and those made of artificial cellulose fibers such as rayon and acetate. It is preferably used in terms of price. 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 resin include cross-linked polyacrylate, self-crosslinked polyacrylate, saponified acrylate-vinyl acetate copolymer cross-linked, isobutylene / maleic anhydride copolymer cross-linked, Examples include cross-linked polysulfonates, and partially cross-linked water-swellable polymers 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 of the highly water-absorbent resin having the water-absorbing performance, it is possible to adjust the absorption ratio (water absorption power) and the absorption speed by adjusting the cross-linking density and the cross-linking 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.

  The width dimension of the absorbent body 4 may be substantially equal over the entire length, and corresponds to the crotch portion including the bodily fluid discharge portion H so as not to give the wearer a feeling of sticking by hitting the crotch portion. A portion cut out in an arc shape may be provided in a predetermined section in the longitudinal direction.

[Absorber 4]
Hereinafter, the absorber 4 will be described in more detail. In this incontinence pad 1, as shown in FIGS. 1 and 2, the absorbent body 4 has a superabsorbent resin in which the superabsorbent resin is disposed in the urine drainage region 12 including at least the body fluid discharger H. The superabsorbent resin has a relatively low density compared to the arrangement region 10 and the superabsorbent resin non-arrangement region where the superabsorbent resin is not arranged or the superabsorbent resin placement region 10. Density regions (hereinafter referred to as “superabsorbent resin non-arrangement region or superabsorbent resin low density region 11”) extend in a direction along the substantially longitudinal direction of the incontinence pad 1 and in the width direction of the incontinence pad 1. Alternatingly arranged. That is, the streaky superabsorbent resin arrangement regions 10 extending in the pad longitudinal direction and the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 are alternately arranged adjacent to each other in the pad width direction. Yes.

  The superabsorbent resin arrangement region 10 is a range in the width direction in which the superabsorbent resin is disposed and the density of the superabsorbent resin is relatively higher than that of the superabsorbent resin low density region. It is comprised only by the water absorbing resin, or it is comprised by having many highly water absorbing resin unevenly distributed in a pulp.

  The superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 has no superabsorbent resin or has a relatively low density of the superabsorbent resin compared to the superabsorbent resin placement region 10. It is a range in the width direction, and is constituted only by a pulp that does not contain a superabsorbent resin at all, or although a slightly superabsorbent resin is mixed in the pulp, it has a superabsorbent water compared to the superabsorbent resin arrangement region 10. The density of the conductive resin is configured to be extremely small. Specifically, the amount of the superabsorbent resin in the superabsorbent resin low density region 11 is 1 to 40%, preferably 1 to 20% of the superabsorbent resin blend amount in the superabsorbent resin arrangement region 10. Is desirable.

  The superabsorbent resin arrangement region 10 and the superabsorbent resin non-arrangement region or the superabsorbent resin low-density region 11 include at least a urine drainage region 12 including a body fluid discharge portion H, preferably a crotch portion corresponding to a crotch portion of a wearer. It is formed in the partial area. Since the incontinence pad 1 shown in FIG. 1 has a structure having a longitudinal dimension extending substantially in the length before and after the body fluid discharge part H, the urination part region 12 is located at the center part in the longitudinal direction. However, in the case of the incontinence pad 1 that is formed long rearward so as to widely cover the buttocks groove, the urination region 12 is positioned closer to the front side of the product.

  In the example shown in FIG. 1, the superabsorbent resin arrangement region 10 and the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 are formed over the entire length in the longitudinal direction of the absorbent body 4. . That is, the superabsorbent resin arrangement region 10 and the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 are formed so as to penetrate the front end edge and the rear end edge of the absorbent body 4, respectively. . On the other hand, as will be described later, the superabsorbent resin arrangement region 10 and the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 are alternately arranged in the width direction in the longitudinal direction including the urine drainage region 12. You may comprise to the intermediate part of a direction, and the edge part side of a longitudinal direction may be comprised by the super absorbent polymer arrangement | positioning area | region 10 over the full width from it.

  With respect to the width direction of the incontinence pad 1, the superabsorbent resin arrangement region 10 and the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 are alternately arranged over the entire width in the width direction. Alternatively, only the central portion in the width direction is a region in which the superabsorbent resin arrangement region 10 and the superabsorbent resin non-arrangement region or the superabsorbent resin low-density region 11 are alternately arranged, and both sides thereof are arranged. It may be constituted by the superabsorbent resin arrangement region 10, or may be constituted by the superabsorbent resin non-arrangement region or the superabsorbent resin low-density region 11, preferably from the viewpoint of preventing side leakage. It is good to comprise by.

  As shown in FIG. 2 and FIG. 3 (A), the skin side surface of the absorbent body 4 is preferably formed to be substantially flat before liquid absorption. That is, the height of the superabsorbent resin arrangement region 10 is substantially equal to the height of the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11, and the superabsorbent resin placement region 10 is formed on the skin side. It is preferable that unevenness due to the height difference between the high water absorbent resin non-arranged region or the high water absorbent resin low density region 11 is not provided. The phrase “substantially flat” means that the height difference between the convex part and the concave part is within 2 mm, preferably within 1 mm.

  In the incontinence pad 1 having the above configuration, as shown in FIG. 3 (B), the highly water-absorbing resin arrangement region 10 becomes highly water-absorbing when the highly water-absorbing resin absorbs water and swells during urination. By projecting higher on the skin side than the non-adhesive resin placement region or the high water-absorbing resin low-density region 11, the flange 13 formed by the high water-absorbing resin placement region 10 on the surface of the absorber 4, and the high water-absorbing resin The groove portions 14 formed by the non-arranged region or the high water-absorbing resin low-density region 11 extend in the direction along the substantially longitudinal direction of the incontinence pad 1 and are alternately formed in the width direction of the incontinence pad 1. Therefore, even if there is repeated urination in the same part little by little, body fluid flows back and forth through the groove part 14 of the heel part 13 and the groove part 14 formed by the previous urination and is absorbed. , It is possible to prevent urine from being concentrated in the same place, and only the superabsorbent resin in a specific area does not swell to give the wearer a sense of incongruity and does not deteriorate the wearing feeling . In addition, if urine is absorbed in the same place, the liquid may not be absorbed due to gel blocking and leakage may occur. However, in the incontinence pad 1, urine is diffused and absorbed through the groove portion 14 as described above. High absorption performance can be obtained. In addition, since the superabsorbent resin non-arrangement region or the superabsorbent resin low-density region has pulp, the initial water absorption rate is higher than when there is no pulp and only the superabsorbent resin is present. , Body fluid can be prevented from diffusing too much and leaking.

  Furthermore, since the part which contacts skin after liquid absorption is the front-end | tip of the collar part 13 formed by the said highly water-absorbing-resin arrangement | positioning area | region 10, a contact area with skin becomes small and the discomfort by a wet feeling can be reduced. At the same time, since there are many highly water-absorbing resins on the skin contact surface, liquid return is reduced.

  Further, as described above, since the skin side surface of the absorbent body 4 before liquid absorption is formed almost flat, the surface of the incontinence pad 1 can be in close contact with the skin surface before liquid absorption, and stress incontinence, etc. Thus, even when a small amount of urine is discharged, the urine does not flow along the skin and is reliably absorbed by the absorber 4.

  Next, the dimensions of each part will be described. The width of the superabsorbent resin arrangement region 10 is 5 to 20 mm, preferably about 10 mm, while the width of the absorber 4 is 45 to 100 mm. The width of the water absorbent resin non-arranged region or the high water absorbent resin low density region 11 is 8 to 20 mm, preferably about 10 mm. The superabsorbent resin in the superabsorbent resin arrangement region 10 absorbs water and swells, and the surface of the absorbent body 4 has a flange portion formed by the superabsorbent resin disposition region 10 portion and the superabsorbent resin non-arrangement region or superabsorbent polymer. In order to prevent the groove portion from being filled by swelling of the highly water-absorbent resin when the groove portion is formed by the resin low-density region 11 portion, the highly water-absorbing resin non-arranged region or the highly water-absorbent resin low-density region 11 is prevented. The lower limit value of the width is 8 mm or more, which is larger than the lower limit value of the width of the superabsorbent resin arrangement region 10.

  The boundary between the superabsorbent resin arrangement region 10 and the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 does not necessarily have to be clear. The boundary may be unclear by entering between the pulp fibers of the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11. In this case, the superabsorbent resin placement area 10 is within a range where the basis weight of the superabsorbent resin is 60% or more of the maximum basis weight, and a smaller area than the basis weight is a superabsorbent resin non-placement area or a superabsorbent resin low area. The density region 11 can be obtained.

  When the superabsorbent resin arrangement regions 10, 10... Are provided in a plurality of strips, the width of each superabsorbent resin arrangement region 10 does not have to be constant, and may be different in each part. For example, as shown in FIG. 1, the superabsorbent resin arrangement regions 10 and 10 at the center in the width direction may be wide and the superabsorbent resin arrangement regions 10 and 10 on both sides may be narrow.

  The superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 is preferably disposed in the center of the absorbent body 4 in the width direction. That is, it is preferable to arrange in a pattern in which the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 is located at a position where the longitudinal center line of the absorber 4 passes. Thereby, when the said collar part 13 and the groove part 14 are formed when water absorbing resin absorbs water, the part contact | abutted to the wearer's bodily fluid discharge part H of the width direction center part becomes the groove part 14, and is discharged | emitted repeatedly. It becomes easy to diffuse urine in the front-rear direction through the groove portion 14. The superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 is arranged at the center of the absorbent body 4 in the width direction, and one or a plurality of the superabsorbent resin low-density regions 11 are arranged on both sides of the absorber 4. It is preferable to arrange with an odd number. In this case, the superabsorbent resin arrangement region 10 is arranged with an even number of two or more as a whole. In particular, since a pattern in which both side portions of the absorbent body 4 become the superabsorbent resin arrangement region 10 is desirable, in that case, it is preferable to arrange the superabsorbent resin arrangement region 10 in an even number of four or more.

  As shown in FIG. 1, as the planar pattern of the superabsorbent resin arrangement region 10 and the superabsorbent resin non-arrangement region or the superabsorbent resin low-density region 11, the superabsorbent resin disposition region 10 and the superabsorbent resin as shown in FIG. The resin non-arranged region or the highly water-absorbent resin low-density region 11 may be formed over the entire length in the longitudinal direction of the absorbent body 4, or urine from the front and rear ends as shown in FIG. In order to prevent leakage of the absorbent body 4, both end portions in the longitudinal direction of the absorbent body 4 are made into the superabsorbent resin arrangement region 10 over the entire width, and the superabsorbent resin non-arrangement region or the superabsorbent resin low-density region 11 is arranged. It may not be done. That is, the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 extends to the middle in the longitudinal direction that does not reach the front and rear end edges, and the superabsorbent resin disposition region 10 is located on the end side in the longitudinal direction. To be formed.

  The superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 can be arranged in various plane patterns as shown in FIG. In FIG. 4 (A), a total of three superabsorbent resin non-arrangement regions or superabsorbent resin low density regions 11, 11,... It is arranged with. In FIG. 4B, superabsorbent resin non-arrangement regions or superabsorbent resin low-density regions 11, 11,. In this case, it is preferable that the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 at the center in the width direction is longest and the outer one is gradually shortened. By forming the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 at the center in the width direction long, urine can be diffused in a wider range in the longitudinal direction, and the absorbent body 4 is spread over a wide range in the longitudinal direction. Can be used effectively. Further, the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 may be a straight line over the entire length, or, as shown in FIG. You may make it provide the bending part 11a which curves or bends outside or inside. Thereby, since the urine flowing in the longitudinal direction along the collar portion 14 formed by the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 can be guided in the width direction along the bent portion 11a, The absorber 4 can be effectively used over a wider range. The bent portion 11a may be branched into two or more branches, particularly in the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 at the center in the width direction.

  In the superabsorbent resin arrangement region 10, the superabsorbent resin may be arranged substantially evenly with respect to the thickness direction of the absorber 4, as shown in FIGS. As shown in FIG. 5, the absorbent body 4 may be arranged unevenly on the skin side. When it arrange | positions equally in the thickness direction, the absorption performance with respect to the thickness direction improves. On the other hand, when arranged unevenly on the skin side, when the highly water-absorbing resin absorbs water and swells, the highly water-absorbing resin arrangement region 10 is raised on the skin side, and the heel part 13 is easily formed. As a form in which the superabsorbent resin is unevenly distributed on the skin side of the absorber 4, as shown in FIG. 5 (A), the superabsorbent resin layer on the skin side and the non-skin side of the skin side with respect to the thickness direction. A two-layer structure including a pulp layer may be used, or a structure in which the density of the superabsorbent resin gradually decreases from the skin side to the non-skin side as shown in FIG. 5 (B).

  Next, how to fix the absorbent body 4 and the liquid-permeable surface sheet 3 will be described. As shown in FIG. 6, the absorbent body 4 and the liquid-permeable surface sheet 3 are joined to each other at a central portion in the width direction of the superabsorbent resin arrangement region 10 with a linear adhesive portion 15 along the longitudinal direction. In the high water-absorbing resin non-arranged region or the high water-absorbing resin low-density region 11, it can be prevented from joining. As a result, when the ridge portion 13 in which the superabsorbent resin absorbs water and swells and the superabsorbent resin arrangement region 10 is raised on the skin side is formed, as shown in FIG. The groove portion 14 formed by the resin non-arrangement region or the high water-absorbing resin low density region 11 becomes a space portion where the liquid-permeable surface sheet 3 is not interposed, and body fluid easily diffuses through the space portion.

  Further, as another embodiment for joining the absorbent body 4 and the liquid-permeable surface sheet 3, as shown in FIG. 7, the central portion in the width direction of the superabsorbent resin arrangement region 10 is a line along the longitudinal direction. In addition to the adhesive portion 15 having a shape, the central portion in the width direction of the superabsorbent resin non-arranged region or the low water absorbent resin low-density region 11 can be joined by a streaky adhesive portion 16 along the longitudinal direction. Accordingly, as shown in FIG. 7 (B), the highly water-absorbent resin absorbs water and swells to form the ridge portion 13 and the groove portion 14 on the skin side of the absorbent body 4. Since the topsheet 3 is also formed in a concavo-convex shape, the contact area with the skin can be reduced, making it difficult to feel discomfort due to a wet feeling.

  In order to manufacture the absorbent body 4 provided with the superabsorbent resin arrangement region 10 and the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11, as described above, This can be achieved by filling the concave groove with a highly water-absorbent resin with respect to the pulp base material in which the concave groove is formed on the skin side surface of the portion to be formed. This method has an advantage that the skin side surface of the absorbent body 4 can be easily flattened by adjusting the filling amount of the superabsorbent resin.

  As another manufacturing method, as shown in FIG. 8 (A), a high water-absorbing resin is sprayed in a streaky manner into the absorbent body forming recesses of the stacking drum and then formed by stacking pulp. Alternatively, as shown in FIG. 8 (B), the density of the superabsorbent resin can be changed by increasing or decreasing the suction force from the bottom of the recess for forming the absorbent body during fiber stacking. Alternatively, as shown in FIG. 8 (C), it may be formed by spreading only the pulp and then spreading the superabsorbent resin in a streak pattern on the surface. As shown in (D), the absorbent body forming recess may be divided into a mixing zone of pulp and superabsorbent resin and a zone containing only pulp, and then stacked.

  Furthermore, as another manufacturing method, it is formed by laminating a polymer sheet in which a superabsorbent resin is arranged in a portion corresponding to the superabsorbent resin arrangement region 10 on the skin side of a pulp layer mainly composed of pulp. May be. In this manufacturing method, since the superabsorbent resin is fixed in the polymer sheet, the superabsorbent resin can be prevented from spilling out in the manufacturing process, and the manufacture is facilitated. The polymer sheet is preferably formed with a thickness of 2 mm or less so that the skin side surface of the absorber 4 is as flat as possible.

  As the polymer sheet, a superabsorbent resin is bonded between two non-woven fabrics by a binder such as a hot melt adhesive, and the superabsorbent resin non-arrangement region or the superabsorbent resin low density region 11 and the outer edge portion In this case, the non-woven fabric may be directly bonded with a hot melt adhesive, heat seal, ultrasonic seal, etc. so that a superabsorbent resin is sealed between the two non-woven fabrics, A material in which a superabsorbent resin is held or a fibrous superabsorbent resin (SAF) mixed in a non-woven fabric may be used.

  DESCRIPTION OF SYMBOLS 1 ... Incontinence pad, 2 ... Liquid impervious back sheet, 3 ... Liquid permeable surface sheet, 4 ... Absorber, 10 ... High water absorption resin arrangement | positioning area | region, 11 ... High water absorption resin no arrangement | positioning area | region or high water absorption resin Low density area, 12 ... Urination area, 13 ... Gutter part, 14 ... Groove part, 15.16 ... Adhesion part

Claims (6)

In an absorbent article in which an absorbent mainly composed of pulp and a superabsorbent resin is interposed between the liquid-permeable top sheet and the back sheet,
The absorbent body includes at least a superabsorbent resin arrangement region in which the superabsorbent resin is disposed in a region including the body fluid discharge portion, and a superabsorbent resin non-arrangement region in which the superabsorbent resin is not disposed or The superabsorbent resin low-density region in which the density of the superabsorbent resin is relatively lower than the superabsorbent resin arrangement region extends in a direction along the substantially longitudinal direction of the absorbent article, and the width direction of the absorbent article are alternately arranged in the,
The absorbent body and the liquid-permeable surface sheet are joined together by a streak-shaped adhesive portion along the longitudinal direction at the center in the width direction of the superabsorbent resin arrangement region, An absorbent article characterized in that it is not bonded in a low density region of the water absorbent resin . In an absorbent article in which an absorbent mainly composed of pulp and a superabsorbent resin is interposed between the liquid-permeable top sheet and the back sheet,
The absorbent body includes at least a superabsorbent resin arrangement region in which the superabsorbent resin is disposed in a region including the body fluid discharge portion, and a superabsorbent resin non-arrangement region in which the superabsorbent resin is not disposed or The superabsorbent resin low-density region in which the density of the superabsorbent resin is relatively lower than the superabsorbent resin arrangement region extends in a direction along the substantially longitudinal direction of the absorbent article, and the width direction of the absorbent article Alternately arranged
The absorbent body and the liquid-permeable surface sheet are a streak-like adhesive portion along the longitudinal direction of the central portion in the width direction of the superabsorbent resin arrangement region, and the superabsorbent resin non-arrangement region or the superabsorbent resin An absorptive article characterized in that a central portion in a width direction of a low density region is joined by a streak-like adhesive portion along a longitudinal direction . The absorbent article according to claim 1 , wherein a skin side surface of the absorbent body before liquid absorption is formed substantially flat. The absorbent article according to any one of claims 1 to 3 , wherein the superabsorbent resin non-arranged region or the superabsorbent resin low-density region is disposed at a central portion in the width direction of the absorber. The longitudinally opposite ends of the absorbent body are respectively set as the superabsorbent resin arrangement region over the entire width, and the superabsorbent resin non-arrangement region or the superabsorbent resin low-density region is not arranged. -Absorbent article in any one of 4 . The absorbent article according to any one of claims 1 to 5 , wherein in the superabsorbent resin arrangement region, the superabsorbent resin is arranged unevenly on the skin side of the absorber.

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