JP2023033895A - Auxiliary absorbent sheet - Google Patents

Abstract

To provide an auxiliary absorbent sheet for increasing a body fluid absorption amount, preventing side leakage and rear leakage of body fluid derived from a body shape and a posture of a wearer, and capable of being used with an absorbent article.SOLUTION: There is provided an auxiliary absorbent sheet 1 comprising: a liquid permeable skin side sheet 14; a liquid permeable non-skin side sheet 15; and a high absorbent polymer 13 provided therebetween. Between the skin side sheet 14 and the non-skin side sheet 15, there are provided: a plurality of polymer existence regions 10 where the high absorbent polymer 13 exists; and a seal part 11 which is obtained by joining the skin side sheet 14 and the non skin side sheet 15 as a polymer non-existence region where there is no high absorbent polymer 13. The seal part 11 surrounds the polymer existence regions 10, and separates the adjacent polymer existence regions 10 in a longitudinal direction and/or a width direction of the auxiliary absorbent sheet 1. The seal part 11 comprises: a cutting possible line 11; and a slip resistance member for fixing the polymer existence region 10 to a prescribed position, and the seal part extends in a non linear state in the longitudinal direction of the auxiliary absorbent sheet 1.SELECTED DRAWING: Figure 1

Description

The present invention relates to auxiliary absorbent sheets.

Absorbent articles come in various forms depending on the application, such as pad products such as light incontinence pads, light incontinence liners, urine absorption pads, and sanitary napkins, and disposable diaper products such as pants-type disposable diapers and tape-fastening type disposable diapers. exist and are widely used by the elderly, adults and infants. In addition, in order to absorb body fluids such as urine that cannot be absorbed by pad products alone, to absorb body fluids leaking from pad products, and to extend the life of disposable diaper products from a cost perspective, along with absorbent articles, A supplementary absorbent sheet is also used.

A general auxiliary absorbent sheet has a simple structure in which, for example, a superabsorbent polymer is placed between two liquid-permeable nonwoven fabrics, but various other proposals have been made. In Patent Document 1, a liquid-permeable upper layer sheet, a liquid-permeable lower layer sheet, a plurality of three-dimensional knitted fabrics interposed between these sheets, and an upper layer sheet and a lower layer sheet between the plurality of three-dimensional knitted fabrics and a cuttable line such as a perforation formed in the seal portion (Claim 1). The shape is quadrangular, circular, elliptical, triangular, pentagonal, or other polygonal shape (paragraph 0026). (Paragraph 0048) and the like are described. According to Patent Document 1, it is described that it is possible to provide an absorption-assisting article whose size can be appropriately adjusted according to the desires of the wearer, which is convenient to use, and which can properly seal loose stools and the like inside. (Paragraph 0021).

JP 2015-171410 A

However, if the auxiliary absorbent sheet of Patent Literature 1 is used in combination to prevent the absorbent article from leaking on the back side, post-leakage of body fluids such as urine from the vicinity of the buttocks of the wearer is likely to occur. The inventor of the present invention has obtained the following findings after examining the cause of this problem. In the auxiliary absorbent sheet of Patent Document 1, a seal portion 40 is formed by joining the upper layer sheet 10 and the lower layer sheet 20 around the three-dimensional knitted fabric 30 in the plane direction, and one three-dimensional knitted fabric 30 and another adjacent three-dimensional knitted fabric 30 are formed. A seal portion 40 is interposed between the knitted fabric 30 and the seal portion 40 extends linearly in the longitudinal direction of the auxiliary absorbent sheet (FIGS. 1 and 7). Although the superabsorbent polymer may be placed on the three-dimensional knitted fabric 30 , it is not placed on the seal portion 40 . As a result, as shown in FIG. 8 of the specification of the present application, the portion of the superabsorbent polymer disposed in the three-dimensional knitted fabric 30 swells and acts as a weir for body fluids, while the seal portion 40 that does not swell is permeable to body fluids. However, it does not swell and does not function as a weir, and since the seal portion 40 is provided linearly in the longitudinal direction, it forms a flow path for body fluids as indicated by arrows, and post-leakage cannot be sufficiently suppressed.

In addition, Patent Document 1 states, "In the present invention, it is preferable that the three-dimensional knitted fabric 30 does not contain a super absorbent polymer or a water absorbent pulp. intervening, these water-absorbing materials expand and deteriorate the fluidity of liquids such as urine in this three-dimensional knitted fabric 30." denying the inclusion of Furthermore, although Patent Document 1 describes a rectangular shape extending in the longitudinal direction, a circular shape, an elliptical shape, a triangular shape, a pentagonal shape, other polygonal shapes, etc. as the planar view shape of the three-dimensional fabric 30 (paragraph 0026), Patent Document 1 does not describe a method for arranging three-dimensional fabrics 30 having a planar shape, and only describes seal portions 40 that extend linearly in the longitudinal direction. The seal portion 40 that extends non-linearly in the longitudinal direction is not described in Patent Document 1, nor is it obvious from Patent Document 1.

SUMMARY OF THE INVENTION An object of the present invention is to provide an auxiliary absorbent sheet capable of increasing the absorption of body fluids, preventing side leakage and back leakage of body fluids caused by the wearer's body shape and posture, and used in combination with absorbent articles. That is.

As a result of intensive research to solve the above problems, the present inventors have found that by adjusting the plan view shape and arrangement of the polymer existing region surrounded by the seal portion, the seal portion is provided in a non-linear manner in the longitudinal direction. As a result, the inventors have found that an auxiliary absorbent sheet that satisfies the purpose can be obtained, and have completed the present invention. The present invention relates to the following auxiliary absorbent sheet.

(1) A liquid-permeable skin-side sheet, a liquid-permeable non-skin-side sheet, and a superabsorbent polymer positioned between the skin-side sheet and the non-skin-side sheet to absorb and retain bodily fluids. , an auxiliary absorbent sheet comprising:
Between the skin-side sheet and the non-skin-side sheet, a plurality of polymer-existing regions in which the superabsorbent polymer exists and a polymer-nonexisting region in which the superabsorbent polymer does not exist,
The non-polymer-existing region is a sealing portion that joins the skin-side sheet and the non-skin-side sheet. is spaced apart in the longitudinal direction and / or width direction of the auxiliary absorbent sheet,
The seal portion includes a cuttable line that detachably connects the adjacent polymer-existing regions, and the polymer-existing region separated by breaking the cuttable line is a predetermined area on the skin surface of the wearer of the auxiliary absorbent sheet. a non-slip member fixed in position;
The auxiliary absorbent sheet, wherein the seal portion extends non-linearly in the longitudinal direction of the auxiliary absorbent sheet.
(2) the severable lines include three types of severable lines extending in different directions and crossing each other;
The auxiliary absorbent sheet according to (1) above, wherein the auxiliary absorbent sheet is divided into a plurality of polymer-existing regions each having a triangular shape in plan view by the three types of cuttable lines.
(3) The auxiliary absorbent according to (1) or (2) above, wherein the polymer-existing region is a triangular polymer-existing region in a plan view having corners protruding in one or the other longitudinal direction of the absorbent sheet. sex sheet.
(4) The polymer-existing region includes a triangular polymer-existing region X having the corners that protrude in one longitudinal direction of the auxiliary absorbent sheet and a polymer-existing region X that is triangular in plan view and protrudes in the other longitudinal direction of the auxiliary absorbent sheet. and a triangular polymer-existing region Y in plan view having the corners that
The auxiliary absorbent sheet according to (3) above, wherein the polymer-existing regions X and the polymer-existing regions Y are alternately arranged along the longitudinal direction or the width direction of the auxiliary absorbent sheet.
(5) The polymer-existing region includes a triangular polymer-existing region M having the corners that protrude in one width direction of the auxiliary absorbent sheet, and a polymer-existing region M that is triangular in plan view and protrudes in the other width direction of the auxiliary absorbent sheet. and a triangular polymer-existing region in plan view having the corners that
The auxiliary absorbent sheet according to (3) above, wherein the polymer-existing regions M and the polymer-existing regions L are alternately arranged along the longitudinal direction or the width direction of the auxiliary absorbent sheet.
(6) The auxiliary absorbent sheet according to (1) above, wherein a plurality of the polymer-existing regions that are circular in plan view are arranged in a polka-dot pattern, and the periphery of the polymer-existing region is surrounded by the seal portion.
(7) The auxiliary absorbent sheet according to any one of (1) to (6) above, wherein the cuttable lines are perforations.

ADVANTAGE OF THE INVENTION According to the present invention, an auxiliary absorbent sheet is provided that can increase the amount of body fluid absorption, can prevent side leakage and back leakage of body fluid derived from the wearer's body shape and posture, and can be used in combination with absorbent articles. .

1 is a plan view schematically showing the configuration of an auxiliary absorbent sheet according to a first embodiment; FIG. FIG. 2 is a schematic cross-sectional view along the X ₁ -X ₁ cutting line shown in FIG. 1; FIG. 4 is a schematic plan view showing the flow of bodily fluids in the auxiliary absorbent sheet according to the first embodiment. FIG. 6 is a plan view schematically showing the configuration of an auxiliary absorbent sheet according to a second embodiment; FIG. 10 is a schematic plan view showing the flow of bodily fluids in the auxiliary absorbent sheet according to the second embodiment. FIG. 11 is a plan view schematically showing an enlarged configuration of a main part of an auxiliary absorbent sheet according to a third embodiment; 1 is a perspective view schematically showing an example of an absorbent article used together with an auxiliary absorbent sheet according to this embodiment; FIG. It is a schematic plan view which shows the subject of a prior art.

In the present specification, the wearing of the auxiliary absorbent sheet refers to a state in which the auxiliary absorbent sheet is worn on the wearer's body together with the absorbent article, regardless of whether the body fluid is absorbed or not. The longitudinal direction, width direction, and thickness direction of the auxiliary absorbent sheet are the same as the longitudinal direction, width direction, and thickness direction of the absorbent article used in combination, respectively. When the absorbent article 50 is worn, it is the direction indicated by Y in the figure that extends from front to back through the crotch of the wearer, and the width direction is the direction indicated by X in the figure that is substantially orthogonal to the longitudinal direction. , and the thickness direction is the direction indicated by Z in the drawing, in which the constituent members are laminated. The skin-side surface of the auxiliary absorbent sheet is the surface that contacts or faces the wearer's skin, and the non-skin-side surface is the surface that contacts or faces the clothing of the wearer. Body fluids refer to liquids excreted from the body to the outside of the body, such as water in urine, blood, and loose stools.

<Auxiliary absorbent sheet>
Auxiliary absorbent sheets 1, 2 and 3 according to this embodiment will be described below with reference to the drawings. 1 to 3 show a supplementary absorbent sheet 1. FIG. 4 and 5 show the auxiliary absorbent sheet 2. FIG. FIG. 6 shows the auxiliary absorbent sheet 3. FIG. FIG. 8 is a plan view for explaining the problem of the prior art (Patent Document 1). Each figure does not define the size relationship of the dimensions of the auxiliary absorbent sheets 1, 2 and 3. FIG.

The auxiliary absorbent sheets 1, 2 and 3 of this embodiment are a kind of absorbent article and are used in combination with other absorbent articles. Absorbent articles that can be combined include various ones for babies, adults, and elderly people, such as light incontinence pads, light incontinence liners, urine absorption pads, pad products such as sanitary napkins, and pants type. Examples include paper diaper products such as paper diapers and tape-fastening type paper diapers, and products in which inner pad products and outer paper diaper products are combined. The absorbent article that can be combined has a longitudinal dimension of, for example, 100 mm or more and 800 mm or less, and a width dimension of, for example, 50 mm or more and 500 mm or less. Further, the auxiliary absorbent sheets 1, 2, 3 have a longitudinal dimension of, for example, 100 mm or more and 350 mm or less, and a width direction dimension of, for example, 50 mm or more and 220 mm or less.

As shown in FIGS. 1 to 6, the auxiliary absorbent sheets 1, 2 and 3 according to this embodiment have the following three structures (a) to (c).
(a) Liquid-permeable skin-side sheet 14, liquid-permeable non-skin-side sheet 15, and high absorbency positioned between skin-side sheet 14 and non-skin-side sheet 15 to absorb and retain body fluids polymer 13;
(b) Between the skin-side sheet 14 and the non-skin-side sheet 15, there are a plurality of polymer-existing regions 10, 10a, 10b in which the superabsorbent polymer 13 exists, and polymer-absent regions in which the superabsorbent polymer 13 does not exist. There is an area. The non-polymer-existing regions are the seal portions 11, 11a, and 11b that join the skin-side sheet 14 and the non-skin-side sheet 15, and the seal portions 11, 11a, and 11b surround the polymer-existing regions 10, 10a, and 10b. are surrounded in the plane direction, and adjacent polymer-existing regions 10, 10a, 10b are spaced apart in the longitudinal direction and/or the width direction of the auxiliary absorbent sheets 1, 2, 3.
(C) The seal portions 11, 11a, and 11b are formed by cutting the severable lines 12, 12a, and 12b that detachably connect the adjacent polymer-existing regions 10, 10a, and 10b, and by breaking the severable lines 12, 12a, and 12b. and a non-slip member (not shown) that fixes the separated polymer-existing regions 10, 10a, and 10b to a predetermined position on the skin surface of the wearer of the auxiliary absorbent sheet 1, and the seal portions 11, 11a, and 11b are auxiliary absorbent sheets. It extends non-linearly in the longitudinal direction of the absorbent sheet 1 .

According to the auxiliary absorbent sheets 1, 2, and 3 of the present embodiment, the shape and arrangement method of the polymer-existing regions 10, 10a, and 10b in plan view are selected so that the seal portions 11, 11a, and 11b, which are likely to become channels for bodily fluids, are formed. extends non-linearly in the longitudinal direction of the auxiliary absorbent sheets 1, 2, 3, so that part of the bodily fluid that travels along the seal portions 11, 11a, 11b reaches the polymer-existing regions 10, 10a, 10b. The other part flows obliquely to the longitudinal direction and is absorbed by the other polymer-existing regions 10, 10a, 10b, making it difficult for the polymer to reach the wearer's buttocks, which is the end point in the longitudinal direction, thereby preventing backward leakage. be done.
In addition, by additionally arranging the auxiliary absorbent sheets 1, 2, 3 or partial pieces thereof in places where a gap is likely to occur between the wearer's body and the absorbent article, the absorbent article as a whole can be It is possible to prevent back leakage of body fluid while increasing the body fluid absorption amount without impairing the feeling of wearing by suppressing the increase in the total amount.
In addition, the auxiliary absorbent sheets 1, 2, 2, 3, 4, 5, 6, 7, 8, 8, 9, 10, 10, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, etc. By adding 3, back leakage and side leakage can be suppressed and eliminated.
Furthermore, by providing the seal portions 11, 11a, 11b with non-slip members, it is possible to prevent deterioration of the body fluid absorption performance of the absorbent article used in combination with the auxiliary absorbent sheets 1, 2, 3.

Hereinafter, the auxiliary absorbent sheets 1, 2, and 3 according to the first to third embodiments and auxiliary absorbent sheets of other forms will be described in more detail.

<Auxiliary absorbent sheet according to the first embodiment>
The auxiliary absorbent sheet 1 according to the first embodiment is a wearer's body shape, posture during wearing, and the like, and the wearer's crotch region, the wearer's buttocks and back, and the end portions of the absorbent article. It is used together with an absorbent article in order to prevent side leakage, back leakage, etc. from a part where a gap is likely to occur. More specifically, as shown in FIG. 7, the auxiliary absorbent sheet 1 can be cut because side leakage is likely to occur around the wearer's crotch and the three-dimensional gathers 24 in the crotch of the absorbent article. Line 12 is arranged in elongated strips 30a, 30b. In addition, when the wearer of the absorbent article is in a supine position, body fluids tend to leak backward around the buttocks and back of the wearer and the rear end of the back portion of the absorbent article. A fragment 31 of 1 is placed. In this way, the arrangement of the auxiliary absorbent sheet 1 or its fragments 30a, 30b, 31 reduces or eliminates gaps, thereby preventing underarm leakage and back leakage. It should be noted that the body fluid that has permeated the auxiliary absorbent sheet 1 is easily absorbed by the absorbent article used in combination. Also, the auxiliary absorbent sheet 1 is worn by the wearer so that its longitudinal direction coincides with the longitudinal direction of the absorbent article in which it is used. Such effects and usage methods are common not only to the auxiliary absorbent sheet 1 but also to the auxiliary absorbent sheet of this embodiment.

(Polymer presence area)
As shown in FIG. 1, the auxiliary absorbent sheet 1 has three types of cuttable lines 12 (or seal portions 11) that extend in different 11), it is divided into a plurality of polymer-existing regions 10 each having a triangular shape in plan view. These polymer-existing regions 10 include a triangular polymer-existing region 10 having corners protruding in one of the longitudinal directions of the auxiliary absorbent sheet 1 and protruding in the other longitudinal direction of the auxiliary absorbent sheet 1 . These two types of polymer-existing regions 10 are arranged alternately in both the longitudinal direction and the width direction. Such an arrangement is a scale pattern in which triangles are alternately arranged, and is also called a replacement pattern. The lengthwise and widthwise dimensions of the polymer-existing region 10 are preferably adjusted within a range of 5 mm or more and 50 mm or less, respectively, from the viewpoint of absorption of body fluids.

By arranging the polymer-existing regions 10 having a triangular shape in a plan view as described above, the seal portions 11 that exist around the polymer-existing regions 10 and tend to serve as flow paths for bodily fluids are arranged in the longitudinal direction as shown in FIG. It is configured to extend non-linearly with respect to the longitudinal direction by bending in an oblique direction (arrow A) or zigzag (arrow B) with respect to the longitudinal direction. The body fluid that has leaked out of the absorbent article and reached the auxiliary absorbent sheet 1 collides with the polymer-existing region 10 existing obliquely to the flowing direction of the body fluid (which coincides with the longitudinal direction), and is mostly absorbed. Even if a part is not absorbed, it is absorbed by other polymer-existing regions 10 before reaching the vicinity of the buttocks of the wearer, preventing backward leakage.

Not limited to this embodiment, for example, the polymer-existing region 10 has a triangular polymer-existing region 10 in plan view and has corners protruding to one side in the width direction of the auxiliary absorbent sheet 1 . and a triangular polymer-existing region 10 in plan view having a corner projecting in the other width direction, and these two types of polymer-existing regions 10 are alternately arranged in the longitudinal direction or the width direction of the auxiliary absorbent sheet 1. It may be in the form of

The polymer-existing region 10 accommodates the superabsorbent polymer 13 in the space between the liquid-permeable skin-side sheet 14 and the liquid-permeable non-skin-side sheet 15, and the skin-side sheet 14 around the superabsorbent polymer 13 in the surface direction. and the non-skin side sheet 15 are joined and sealed. The skin-side sheet 14 and the non-skin-side sheet 15 are, for example, liquid-permeable sheet-like substrates that are soft to the touch and do not irritate the skin, so that they may come into direct contact with the wearer's skin. Examples of the substrate include a hydrophilic sheet, a composite nonwoven fabric which is a laminate of hydrophilic sheets of the same type or different types, a perforated film such as a perforated polyethylene film, a polyethylene foam, a foamed film such as a urethane foam, and the like. . Hydrophilic sheets include, for example, synthetic fibers made of synthetic resins such as polypropylene and polyethylene, regenerated fibers such as rayon, and natural fibers such as cotton. Examples include spunbond nonwoven fabrics and pulp-containing nonwoven fabrics. Among these, nonwoven fabrics are preferred.

The surfaces of the skin-side sheet 14 and the non-skin-side sheet 15 may be embossed or perforated from the viewpoint of improving liquid permeability. From the viewpoint of reducing irritation to the skin, the skin-side sheet 14 and the non-skin-side sheet 15 contain one or more of lotions, antioxidants, anti-inflammatory ingredients, pH adjusters, antibacterial agents, moisturizing agents, and the like. may contain. The basis weights of the skin-side sheet 14 and the non-skin-side sheet 15 are, for example, in the range of 15 g/m ² or more and 40 g/m ² or less from the viewpoint of strength, workability, and liquid return amount. The skin-side sheet 14 and the non-skin-side sheet 15 may be the same or different.

(super absorbent polymer)
The superabsorbent polymer 13 is not particularly limited as long as it can absorb bodily fluids and prevent backflow. Polyacrylate, polyaspartate, (starch-acrylic acid) graft copolymer, ( acrylic acid-vinyl alcohol) copolymers, (isobutylene-maleic anhydride) copolymers and saponified products thereof. Among them, from the viewpoint of absorption per weight, polyacrylates are preferred, alkali metal polyacrylates are more preferred, and sodium polyacrylate is even more preferred. The superabsorbent polymer 13 can be used individually by 1 type or in combination of 2 or more types.

The superabsorbent polymer 13 is used, for example, in the form of particles, fibers, etc., but is preferably used in the form of particles from the viewpoint of ease of handling. At this time, by avoiding the use of a fine powder superabsorbent polymer 13 with poor fluidity as powder and using a superabsorbent polymer 13 having a medium particle size, the basic performance related to absorption is improved and the absorption is improved. It is possible to reduce the rugged feel caused by hardening after the body 20 absorbs bodily fluids. The median particle size of the superabsorbent polymer 13 is, for example, in the range of 50 μm or more and 600 μm or less or in the range of 100 μm or more and 500 μm or less.

The amount of the superabsorbent polymer 13 contained in the polymer-existing region 10 may be set, for example, to such an amount that the body fluid absorption per polymer-existing region 10 is 1 cc or more and 10 cc or less. In order to set as described above, for example, the basis weight of the superabsorbent polymer 13 in each polymer-existing region 10 is in the range of 150 g/m ² or more and 800 g/m ² or less, or 200 g/m ² or more and 700 g/m ^{2 .} It should be adjusted within the following range.

(Seal part)
The seal portion 11 separating the adjacent polymer-existing regions 10 is separated from the skin-side sheet 14 in the region where the superabsorbent polymer 13 does not exist (polymer non-existing region) between the skin-side sheet 14 and the non-skin-side sheet 15. It is joined with the non-skin side sheet 15 . The skin-side sheet 14 and the non-skin-side sheet 15 are joined by, for example, ultrasonic welding, heat welding, or the like. The width of the seal portion 11 can be appropriately selected depending on the planar shape of the polymer-existing region 10, the materials of the skin-side sheet 14 and the non-skin-side sheet 15, and the like. Here, the width of the seal portion 11 is defined as the length dimension of the seal portion 11 in a direction perpendicular to a cuttable line 12 provided in the seal portion 11, which will be described later.

(Cuttable line)
In this embodiment, the cuttable line 12 is provided so as to extend along the seal portion 11 at substantially the center in the width direction of the seal portion 11 . By breaking the cuttable line 12, the adjacent polymer-existing regions 10 can be separated, so that the auxiliary absorbent sheet 1 can be adjusted to a predetermined size according to the place where it is worn. Examples of the cuttable line 12 include perforations.

(Anti-slip member)
The non-slip member is an auxiliary absorbent sheet 1 that is an assembly of polymer-existing regions 10 or a polymer-existing region 10 partially separated by a cuttable line 12, and is placed at a predetermined position on the wearer's skin surface. is fixed to Here, the wearer's skin surface includes not only the wearer's skin and clothes such as underwear of the wearer, but also the skin-side and non-skin-side surfaces of absorbent articles used by the wearer. At least one end of the non-slip member is provided, for example, on the non-skin-side surface of the seal portion 11 between the cuttable line 12 and one or the other end in the width direction of the seal portion 11 . By arranging the non-slip member only on the seal portion 11, the body fluid absorption performance of the absorbent article used in combination is not impaired. The non-slip member has, for example, a strip (rectangular) shape, an elliptical shape, an elliptical shape, or the like in plan view, and an adhesive layer is provided at one end in the longitudinal direction and attached to the non-skin side surface of the seal portion 11. A sheet-like base material, etc., which are joined and provided with an adhesive layer on the other end in the longitudinal direction, and a release sheet, release paper, or the like attached to the surface of the adhesive layer, may be mentioned. At the time of wearing, the release sheet or the like is peeled off, and the adhesive layer is adhered and fixed to the wearer's skin surface. Also, a mechanical fastener such as a hook-and-loop fastener may be used instead of the adhesive layer.

(glue)
A hot melt adhesive, for example, is used to form the adhesive layer of the anti-slip member. As the hot-melt adhesive, those having a melting point of 100° C. or higher and 180° C. or lower can be used without particular limitation. Examples include hot-melt adhesives, olefin-based hot-melt adhesives such as ethylene-vinyl acetate copolymers, and the like. As a method for applying the hot melt adhesive, known methods such as a curtain coating method and a spiral method in which the molten hot melt adhesive is applied from a nozzle in a non-contact manner, and a slot method in which the adhesive is applied in a contact manner can be used. The content of the hot-melt adhesive in the adhesive layer is, for example, in the range of 10 g/m ² or less from the viewpoint of not impairing the absorbability of body fluids of the superabsorbent polymer 13 and the feel when worn.

<Method for producing auxiliary absorbent sheet>
For the auxiliary absorbent sheet 1, for example, a step of dispersing a predetermined amount of superabsorbent polymer 13 on the skin side surface of the non-skin side sheet 15 according to the shape of the polymer existing region 10 and the seal portion 11 in plan view; A process of obtaining a laminate by superposing the skin-side sheet 14 on the skin-side surface of the non-skin-side sheet 15 to which the superabsorbent polymer 13 has been dispersed, and ultrasonically sonicating the polymer-free region of the laminate obtained in the preceding process. A step of forming the sheet portion 12 by joining by welding, heat welding, pressurized heat welding, etc., a step of forming cuttable lines such as perforations in the sheet portion 12, and a non-slip member on the surface of the sheet portion 12. and a step of attaching.

<Auxiliary absorbent sheet according to the second embodiment>
In the auxiliary absorbent sheet 2 according to the second embodiment, the plurality of polymer-existing regions 10a and the sealing portions 11a existing around the polymer-existing regions 10a and separating the adjacent polymer-existing regions 10a are different in plan view shape, except that the auxiliary absorbent sheet 2 is different from the polymer-existing regions 10a. It has the same configuration as the absorbent sheet 1 . In this embodiment, as shown in FIG. 4, the shape of the polymer-existing region 10a is circular in plan view, and the plurality of polymer-existing regions 10a are arranged in a polka dot pattern. The polka dot pattern is an arrangement method in which a plurality of rows in which a plurality of polymer-existing regions 10a are arranged at predetermined intervals in the width direction are arranged in the longitudinal direction, and two rows adjacent to each other in the longitudinal direction have a phase difference. One row of the polymer-existing regions 10a and another row of the seal portions 11a between the polymer-existing regions 10a are arranged in a row in the longitudinal direction. The seal portion 11a surrounds each polymer-existing region 10a in the plane direction and separates the adjacent polymer-existing regions 10a. The cuttable line 12a is formed near the center of the width of the seal portion 11a, surrounds each polymer-existing region 10a in a hexagonal shape, and has a structure in which hexagons are arranged in a honeycomb shape as a whole.

According to the auxiliary absorbent sheet 2 according to the second embodiment, the seal portion 11a is formed in a non-linear shape so as to curve in the longitudinal direction along the contour of the polymer-existing region 10a which is circular in plan view. Therefore, even if the body fluid flows in the longitudinal direction due to gravity as shown by arrow C in FIG. It can prevent back leakage and side leakage.

<Auxiliary absorbent sheet according to the third embodiment>
The auxiliary absorbent sheet 3 according to the third embodiment has the same configuration as the auxiliary absorbent sheet 2 except that the shape of the polymer existing region 10b in plan view is different from the polymer existing region 10a of the auxiliary absorbent sheet 2. . In the auxiliary absorbent sheet 3, as shown in FIG. 6, a plurality of triangular polymer-existing regions 10b having longitudinally protruding corners in plan view are arranged in a scale pattern. The scale pattern is an arrangement method in which a plurality of rows in which a plurality of polymer-existing regions 10b are arranged at predetermined intervals in the width direction are arranged in the longitudinal direction. The polymer-existing regions 10b in one row and the seal portions 11b between the polymer-existing regions 10b in other rows are arranged in the longitudinal direction. Similar to the seal portion 11a of the auxiliary absorbent sheet 2, the seal portion 11b surrounds each polymer-existing region 10b in the planar direction and separates the adjacent polymer-existing regions 10b. The cuttable line 12b is configured to surround the polymer-existing region 10b in a triangular shape along the edge of each polymer-existing region 10a.

According to the auxiliary absorbent sheet 3 according to the third embodiment, the seal portion 11b is inclined in the longitudinal direction or in the zigzag direction (Fig. 6, arrow D) along the contour of the polymer-existing region 10b, which is triangular in plan view. , because it is formed in a non-linear shape in the longitudinal direction, even if body fluid flows in the longitudinal direction due to gravity, it collides with the polymer-existing region 10b on the way and is absorbed, and such absorption is repeated multiple times. You can prevent back leakage and side leakage.

In addition to the first to third embodiments, examples of the planar shape of the polymer existence region include a rectangle, an oval, an ellipse, a gourd shape, and the like, which are elongated in the width direction. In these planar shapes as well, a plurality of rows in which a plurality of polymer-existing regions are arranged at predetermined intervals in the width direction are arranged in the longitudinal direction, and two rows adjacent to each other in the longitudinal direction have polymer presence in one row. By providing a phase difference in each row so that the regions and the seal portions between the polymer-existing regions of other rows are aligned in the longitudinal direction, the seal portions are curved or bent to extend non-linearly in the longitudinal direction. It is possible to prevent back leakage and armpit leakage of bodily fluids.

A specific example of the absorbent article used together with the auxiliary absorbent sheets 1, 2 and 3 of the present embodiment is, for example, an absorbent article 20 shown in FIG. The absorbent article 20 is a type of pad product. a shaped back sheet 22, an absorbent body 23 positioned therebetween, a pair of three-dimensional gathers 24 provided so as to extend in the longitudinal direction near both ends in the width direction of the skin-side surface of the top sheet 21, and one end in the longitudinal direction. anti-slip members 25 provided at both ends in the width direction.

A liquid-permeable sheet-like base material similar to the skin-side sheet 14 and non-skin-side sheet 15 of the present embodiment is used for the top sheet 21 that guides bodily fluids to the absorbent body 23 . A liquid-impermeable sheet-like base material such as a resin film or a liquid-impermeable non-woven fabric is used for the back sheet 22 that prevents body fluids from adhering to the wearer's clothes or the like. The absorbent body 23 that absorbs and retains bodily fluids includes, for example, an absorbent body containing absorbent fibers such as fluff pulp and a superabsorbent polymer 13, and a hydrophilic sheet-like base material such as two sheets of hydrophilic nonwoven fabric. A sheet-like absorbent or the like carrying the superabsorbent polymer 13 is used. The three-dimensional gathers 24 include, for example, a liquid-impermeable sheet-like base material and an elastic stretchable member arranged to extend in the longitudinal direction near the top sheet 21 side end of the base material. The anti-slip member 25 has the same configuration as the anti-slip member of this embodiment described above. Absorbent article 20 can be subjected to various conventionally known modifications without limitation.

Although the present invention has been described using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiments and examples. It is obvious to those skilled in the art that various modifications or improvements can be made to the above embodiments. In addition, it is clear from the description of the scope of the claims that forms with such modifications or improvements can also be included in the technical scope of the present invention.

Reference Signs List 1, 2, 3 auxiliary absorbent sheet 10, 10a, 10b polymer-existing region 11, 11a, 11b seal portion 12, 12a, 12b cuttable line 13 superabsorbent polymer 14 skin-side sheet 15 non-skin-side sheet 20 absorbent article 21 Top sheet 22 Back sheet 23 Absorber 24 Three-dimensional gathers 25 Non-slip member

Claims (7)

It comprises a liquid-permeable skin-side sheet, a liquid-permeable non-skin-side sheet, and a superabsorbent polymer positioned between the skin-side sheet and the non-skin-side sheet to absorb and retain bodily fluids. An auxiliary absorbent sheet,
Between the skin-side sheet and the non-skin-side sheet, a plurality of polymer-existing regions in which the superabsorbent polymer exists and a polymer-nonexisting region in which the superabsorbent polymer does not exist,
The non-polymer-existing region is a sealing portion that joins the skin-side sheet and the non-skin-side sheet. is spaced apart in the longitudinal direction and / or width direction of the auxiliary absorbent sheet,
The seal portion includes a cuttable line that detachably connects the adjacent polymer-existing regions, and the polymer-existing region separated by breaking the cuttable line is a predetermined area on the skin surface of the wearer of the auxiliary absorbent sheet. a non-slip member fixed in position;
The auxiliary absorbent sheet, wherein the seal portion extends non-linearly in the longitudinal direction of the auxiliary absorbent sheet. The cuttable lines include three types of cuttable lines that extend in different directions and intersect each other,
2. The auxiliary absorbent sheet according to claim 1, wherein said auxiliary absorbent sheet is divided into a plurality of said polymer-existing regions having a triangular shape in plan view by said three types of cuttable lines. 3. The auxiliary absorbent sheet according to claim 1, wherein the polymer-existing region is a triangular polymer-existing region in a plan view having corners protruding in one or the other longitudinal direction of the absorbent sheet. . The polymer-existing region includes a polymer-existing region X having a triangular shape in plan view and having the corner protruding in one longitudinal direction of the auxiliary absorbent sheet, and the corner protruding in the other longitudinal direction of the auxiliary absorbent sheet. a triangular polymer-existing region Y in plan view having a portion,
4. The auxiliary absorbent sheet according to claim 3, wherein the polymer-existing regions X and the polymer-existing regions Y are alternately arranged along the longitudinal direction or the width direction of the auxiliary absorbent sheet. The polymer-existing region includes a polymer-existing region M having a triangular shape in plan view and having the corner protruding in one width direction of the auxiliary absorbent sheet, and the corner protruding in the other width direction of the auxiliary absorbent sheet. a triangular polymer-existing region in plan view having a portion,
4. The auxiliary absorbent sheet according to claim 3, wherein said polymer-existing regions M and said polymer-existing regions L are alternately arranged along the longitudinal direction or width direction of said auxiliary absorbent sheet. 2. The auxiliary absorbent sheet according to claim 1, wherein a plurality of said polymer-existing regions, which are circular in plan view, are arranged in a polka-dot pattern, and said polymer-existing regions are surrounded by said sealing portion. 7. The auxiliary absorbent sheet according to any one of claims 1 to 6, wherein said cuttable lines are perforations.

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