JP2019083863A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which can suppress liquid leakage from a lateral direction of an absorber, effectively use an absorption capacity of the absorber, and reduce leakage anxiety of a user due to the reddishness of a hemagglutination mass generated in the vicinity of an end part in a longitudinal direction of the absorber.SOLUTION: An absorbent article includes: a lateral leakage preventing groove 81 formed at both right and left sides of an excretion spot part P thereacross in a skin facing surface, and extending in a longitudinal direction, as a leakage preventing groove in which a top sheet 2 and an absorber 4 are integrally recessed; and forward and backward leakage preventing grooves 82,83 formed at the front and rear of the excretion spot part P thereacross, and extending in a lateral direction. A hemagglutination agent is arranged in a member 42a which forms a surface at a skin facing surface side of the absorber 4, or is positioned at a skin facing surface side from the absorber 4. The hemagglutination agent exists in the excretion spot part P, and is arranged so as not to reach both ends in the lateral direction of the absorber 4 in the lateral direction, and is arranged up to a position exceeding the front side and at least one of the leakage preventing grooves 82,83 in the longitudinal direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an absorbent article for menstrual blood absorption.

With regard to absorbent articles for menstrual blood absorption such as sanitary napkins, the diffusion of menstrual blood in the planar direction is controlled by leak-proof grooves in which the top sheet and the absorbent body are integrally recessed to prevent absorption performance and prevent leakage. Performance improvements have been made.
For example, it is widely practiced that a pair of lateral leak-proof grooves extending in the longitudinal direction of the absorbent article are provided on both sides in the longitudinal direction to prevent menstrual blood from leaking from both ends in the lateral direction of the absorber. There is. Moreover, it is also performed in the front part and back part of an absorbent article to provide the leak-proof groove extended in a horizontal direction, and to prevent the leak of the menstrual blood from the longitudinal direction both ends of an absorber.

  There is also known a technique for applying a fluid treatment agent for menstrual blood absorption to an absorbent article to improve menstrual blood absorption performance. For example, Patent Document 1 discloses a menstrual band including an absorbent pad containing a salt of multivalent ion. In addition, the applicant previously proposed an absorbent article containing a blood coagulant containing a water-soluble metal compound in an absorbent core (see Patent Document 2).

Japanese Patent Publication No. 38-17449 JP 2005-287997 A

However, when a leak-proof groove extending in the lateral direction is provided as a leak-proof groove in the front part or the rear part of the absorbent article, the diffusion of menstrual blood beyond the leak-proof groove is suppressed. Many parts which do not absorb liquid remain in the absorber, and the utilization efficiency of the absorber is lowered.
In addition, when the hemagglutinating agent having high ability to form red blood cell clumps is disposed in the entire absorption area of the napkin, the present inventors have found that red blood clumps are formed on the side and front and back of the napkin. It was found that the taste was so strong that the wearer might be concerned that a leak might have occurred when the user removed the napkin after use.

  An object of the present invention relates to providing an absorbent article that can solve the above-described problems with the prior art.

  The present invention comprises a liquid-permeable top sheet forming the skin-facing surface, a back sheet forming the non-skin-facing surface, and an absorber disposed between the two sheets, and a longitudinal direction along the longitudinal direction of the wearer And an absorbent article for absorbing menstrual blood having a transverse direction orthogonal to the longitudinal direction, wherein the liquid discharge portion of the wearer is opposed as a leak-proof groove in which the surface sheet and the absorber are integrally recessed. It is formed on both the left and right sides of the excrement spot portion to be arranged, and is formed on the front and the back of the side leak leakage groove extending in the vertical direction and the excrement spot portion respectively, A hemagglutinating agent is disposed on a member which has a rear leak-proof groove and which forms the surface on the skin-facing surface side of the absorber or is located on the skin-facing surface side of the absorber. The hemagglutinating agent is not discharged in the lateral direction. It is arranged in the spot and not to reach both lateral ends of the collecting body, and in the longitudinal direction, it exists in the excretory spot and at least one of the front and rear leakproof grooves An absorbent article provided to a position beyond the point.

  According to the absorbent article of the present invention, it is possible to suppress the liquid leakage from the lateral direction of the absorber, and to effectively utilize the absorption capacity of the absorber, and hemagglutination near the longitudinal end of the absorber. It is possible to prevent the user's fear of leakage due to the redness of the lump.

FIG. 1 is a plan view of a sanitary napkin according to an embodiment of the present invention as viewed from the side facing the skin. FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. FIG. 3 is a schematic plan view of the absorbent body of the sanitary napkin shown in FIG. 1 as viewed from the side facing the skin, and the portion where the hemagglutinating agent is disposed is indicated by the hatched portion. FIG. 4: is the FIG. 3 equivalent view of the absorber of the sanitary napkin which is other embodiment of this invention. FIG. 5: is an enlarged plan view which shows the example of the leak-proof groove which provided the high pressing part and the low pressing part in the bottom part.

Hereinafter, the absorbent article for menstrual blood absorption of the present invention will be described based on its preferred embodiment with reference to the drawings.
A sanitary napkin 1 (hereinafter, also referred to as a napkin 1), which is an embodiment of the present invention, is an absorbent article for menstrual blood absorption, and as shown in FIGS. 1 and 2, forms a skin-facing surface. A liquid-permeable top sheet 2, a back sheet 3 forming a non-skin facing surface, and a liquid-retaining absorbent 4 disposed between the two sheets 2 and 3 are provided. The top sheet 2, the absorber 4 and the back sheet 3 are integrated to constitute an absorbent main body 5. Side leak-proof sheets 6 are disposed on the top sheet 2 side of both longitudinal side portions of the absorbent main body 5.
The side leakproof sheet 6 has a free end 61 not joined to the surface sheet 2 and a fixed end 62 joined to the surface sheet 2, and in use, between the fixed end 62 and the free end 61. Separates from the top sheet 2 to form a leak-proof pocket (not shown) that prevents lateral leakage. On the non-skin facing surface side of the absorbent main body 5, a main body adhesive portion (not shown) used for fixing the shorts to the crotch portion is provided. In addition, the napkin 1 has a pair of wing portions 7 on both sides in the longitudinal direction X. On the surface on the back sheet 3 side of the pair of wing portions 7, wing portion adhesive portions (not shown) used for fixing the crotch portion of the shorts to the non-skin opposing surface are provided.

  As the top sheet 2, the back sheet 3, and the side leakproof sheet 6, various kinds of materials conventionally used in absorbent articles such as sanitary napkins can be used without particular limitation. For example, as the surface sheet 2, nonwoven fabric of a single layer or a multilayer structure, an apertured film, etc. can be used. The surface sheet 2 may have irregularities on the surface facing the skin, and may have an oil agent such as an agent for controlling hydrophilicity attached to the surface of the constituent fibers. When the surface sheet 2 has a multilayer structure, a first fiber layer located closer to the skin of the wearer and a second fiber layer located farther from the skin of the wearer are used as the surface sheet 2 And the two fiber layers are integrated in the thickness direction by a plurality of partially formed joints, and a portion of the first fiber layer located between the plurality of joints is convexly formed. The uneven | corrugated sheet | seat which bulges and forms the convex part of the said uneven | corrugated shape can be used. As an uneven | corrugated sheet | seat whose convex part is a solid structure, the thing of Unexamined-Japanese-Patent No. 2007-182662 and 2002-187228 can be used, for example. As the back sheet 3, a resin film, a resin film, a non-woven fabric, a laminate, or the like can be used. The back sheet 3 is made of a liquid-impermeable (including liquid impermeable) or water-repellent one, and it is preferable to use a moisture-permeable resin film or the like. As the side leakproof sheet 6, a laminated nonwoven fabric with high water pressure resistance, a laminate of a resin film and a nonwoven fabric, or the like can be used.

  As shown in FIG. 1, the napkin 1 has a longitudinal direction X along the longitudinal direction of the wearer and a lateral direction Y orthogonal to the longitudinal direction X. In addition, the napkin 1 has an excretory part opposing part B having an excretory spot part P disposed in the lateral direction Y central part so as to face the liquid excretory part of the wearer such as a vaginal opening, and the wearer's front side from the excretory part opposing part B And a rear portion C disposed on the rear side of the wearer from the excretion portion facing portion B. That is, the napkin 1 is divided in the longitudinal direction X into the front portion A, the excretion portion facing portion B, and the rear portion C in this order.

  In the absorbent article of the present invention, the skin-facing surface is a surface of the absorbent article (napkin 1) that is directed to the skin side of the wearer when worn, and the non-skin-facing surface is in the absorbent article (napkin 1). When worn, it is a face that is directed to the side opposite the skin side (usually the clothes side). The excretory spot portion P is a portion which is disposed opposite to the liquid excretory portion such as the vaginal opening of the wearer when the absorbent article such as the napkin 1 or the like is worn, and the menstrual blood is directly supplied. It is located at the central portion in the longitudinal direction X and the lateral direction Y of the excretion portion facing portion B.

  In the absorbent article of the present invention, the excretory part facing part B is a region having a wing part in the longitudinal direction X of the absorbent article when it has a wing part like the napkin 1 of the present embodiment (one It means a region between the base of the wing along the longitudinal direction X and the base of the other wing along the longitudinal direction X). When the absorbent article does not have wings, the central area when the absorbent article is divided into three areas by dividing the entire length in the longitudinal direction X into three equal parts is the excretory part facing part B and can do.

  In the napkin 1, the top sheet 2 covers the whole area on the skin facing surface side of the absorbent body 4, and the back sheet 3 covers the whole area on the non-skin facing surface side of the absorbent body 4. The surface sheet 2 and the back surface sheet 3 are connected to each other by extending portions from both end edges in the longitudinal direction X of the absorber 4. Further, the back sheet 3 and the side leak-barrier sheet 6 are joined to each other at the portions extending outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorber 4. Thus, the absorbent body 4 is sandwiched between the top sheet 2 and the back sheet 3, and the top sheet 2 or the side leakproof sheet 6 and the back sheet 3 are joined at the entire outer edge of the napkin 1. For bonding between the sheets constituting the napkin 1, any bonding means such as an adhesive, heat seal, ultrasonic seal or the like is used.

As shown in FIG. 2, the absorbent body 4 of the napkin 1 of the present embodiment has an absorbent core 41 containing a cellulose-based hydrophilic fiber and a core wrap sheet 42 for covering the absorbent core 41. .
The core wrap sheet 42 is rolled down to the non-skin facing surface side of the absorbent core 41 and the upper side portion 42 a covering the skin facing surface side of the absorbent core 41, and the non-skin facing surface side of the absorbent core 41. And a lower portion 42b that covers the Further, the core wrap sheet 42 has an overlapping portion 42c between the sheets in the lower portion 42b.
The core wrap sheet covering the absorbent core 41 may wrap the entire absorbent core 41 in one sheet, or may wrap the entire absorbent core 41 in two or more sheets. For example, the skin facing surface side and the non-skin facing surface side of the absorbent core 41 may be covered with separate sheets. Regardless of the number of sheets used for covering the absorbent core 41, the core wrap sheet covering the skin-facing surface side of the absorbent core 41 is used as the skin-side core wrap sheet 42a and the non-absorbent core 41. The portion covering the skin facing surface side is also referred to as a non-skin side core wrap sheet 42b.

  In the napkin 1 of the present embodiment, as shown in FIGS. 2 and 3, hemagglutination on the skin side core wrap sheet 42a which is the upper portion covering the skin facing surface side of the absorbent core 41 in the core wrap sheet 42 The agent is distributed. A hemagglutinating agent is partially disposed on the upper portion of the core wrap sheet 42. That is, the skin-side core wrap sheet 42a has the coagulant placement portion 9 in which the hemagglutinating agent is disposed, and the coagulant non-placement portion 9N in which the hemagglutination agent is not disposed.

The skin side core wrap sheet 42 a is a member that forms the surface of the absorbent body 4 facing the skin. The skin-side core wrap sheet 42 a is one of the lower members disposed at a position closer to the back sheet 3 than the top sheet 2 in the thickness direction of the napkin 1.
The coagulant placement portion 9 containing a hemagglutinating agent is a member positioned on the skin facing surface side with respect to the absorbent body 4 in the thickness direction of the absorbent article, or between the top sheet 2 and the absorbent body 4 Although it may be formed in a sublayer (not shown) disposed as desired, the sublayer (not shown) or the skin which is a lower member positioned below the top sheet 2 in the thickness direction of the absorbent article The side core wrap sheet 42a is preferably formed, and as in the napkin 1 of the present embodiment, the side core wrap sheet 42a is preferably formed on a member that forms the surface on the skin opposing surface side of the absorbent body 4 It is preferable that the skin-side core wrap sheet 42 a cover the skin-facing surface side of the core 41.

  The hemagglutinating agent may be contained in two or more members. For example, the coagulant placement portion 9 containing a hemagglutinating agent may be formed on the surface sheet 2 and the skin side core wrap sheet 42a, or may be formed on the surface sheet 2 and the sublayer (not shown). The surface sheet 2, the sublayer (not shown), and the skin side core wrap sheet 42a may be formed. Moreover, although the coagulant | flocculant arrangement | positioning part 9 containing a hemagglutinating agent may be formed only in the skin side core wrap sheet 42a, the non-skin side core wrap sheet 42b which covers the non-skin opposing surface side of the absorptive core 41 is carried out. Hemagglutinating agents may also be disposed.

  The skin-side core wrap sheet 42a in which the hemagglutinating agent is disposed in the napkin 1 of the present embodiment is located at the central portion in the lateral direction Y of the absorber 4 in the excretory part opposing part B, as shown in FIG. A coagulant placement portion 9 is provided in the portion, and a coagulant non-placement portion 9N is provided on both sides of the absorber 4 located near both ends of the absorber 4 in the lateral direction Y.

The core wrap sheet is used solely for the purpose of enhancing the shape retention property of the absorbent core having insufficient shape retention, or for preventing the leakage of the material of the absorbent core, such as thin paper and non-woven fabric Fiber sheets are used.
Examples of cellulose fibers that constitute thin paper include wood pulp fibers, rayon fibers, cotton fibers, cellulose acetate fibers and the like. The raw material pulp of the cellulosic fiber includes wood pulp such as softwood kraft pulp or hardwood kraft pulp, and non-wood pulp such as cotton pulp or straw pulp. These cellulose fibers can be used alone or in combination of two or more. Further, from the viewpoint of improving the strength, a small amount of non-cellulosic fibers can also be mixed. Examples of non-cellulose fibers include polyolefin fibers such as polyethylene and polypropylene, and condensation fibers such as polyester and polyamide. The proportion of cellulosic fibers in the constituent fibers of thin paper is preferably 70% by mass to 100% by mass, more preferably 90% by mass to 100% by mass, and still more preferably 100% by mass.

  A nonwoven fabric can also be used as a core wrap sheet. As the type of non-woven fabric, non-woven fabrics produced by various manufacturing methods can be used without particular limitation, and for example, spunbond non-woven fabric, meltblown non-woven fabric, spunlace non-woven fabric which is non-woven fabric obtained by interlacing constituent fibers of fiber web by high speed water flow treatment An air through nonwoven fabric which is a non-woven fabric obtained by heat-sealing constituent fibers of a fiber web by hot air treatment, a resin-bonded non-woven fabric which is a non-woven fabric obtained by bonding constituent fibers of a fiber web with an adhesive, and the like. The fiber web of spunlace non-woven fabric, air-through non-woven fabric, resin-bonded non-woven fabric can be produced by a carding machine, air laid method in which fibers are stacked in air, or the like.

  Raw materials for non-woven fabrics are made of cellulose-based hydrophilic fibers such as wood pulp fibers, rayon fibers, cotton fibers and cellulose acetate, polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, and synthetic resins such as polyamides such as nylon. And synthetic fibers. As the synthetic fiber, core-sheath type or side-by-side type composite fiber can also be used. Among these, from the same reason as using thin paper, it is preferable that the raw material fiber is a cellulose-based fiber even when the non-woven fabric manufacturing method is adopted. In the constituent fibers of the non-woven fabric, the proportion of cellulosic fibers is preferably 70% by mass to 100% by mass, more preferably 90% by mass to 100% by mass, and still more preferably 100% by mass. The raw material fiber of a nonwoven fabric can be used individually by 1 type or in combination of 2 or more types.

  The absorbent core 41 of the napkin 1 is preferably made of a mixed fiber of pulp fibers, which are hydrophilic cellulose fibers, and a superabsorbent polymer. The mixed stack fiber body is manufactured by a known drum-type fiber stacking device provided with a stacking fiber drum having a recess for stacking on the circumferential surface, and while suctioning from the bottom of the recess for stacking, the periphery of the stacking fiber drum Pulp fibers and a superabsorbent polymer as a material for forming the absorbent core are supplied in a scattered state to the surface, and the material for forming the absorbent core is deposited in the accumulation recess, and then released from the accumulation recess. It is obtained by The absorbent core 41 of the napkin 1 of the present embodiment may be a single sheet fiber body that is a cellulose-based hydrophilic fiber that does not contain a superabsorbent polymer.

  The hydrophilic fibers of the cellulose type constituting the absorbent core 41 include non-wood pulp fibers made of non-wood such as wood pulp fibers, cotton pulp or straw pulp, rayon fibers, cotton fibers, cellulose fibers, etc. Fiber is mentioned. These fibers can be used alone or in combination of two or more. In addition to hydrophilic fibers of cellulose type, synthetic fibers such as polyolefin fibers made of polyolefin such as polyethylene and polypropylene, polyester fibers, and condensation fibers such as polyamide are also used as the absorbent core 41 from the viewpoint of strength improvement. You may mix a small amount. In the absorbent core, the proportion of cellulose-based hydrophilic fibers, particularly wood pulp fibers, is 100% by mass or less, preferably 50% by mass to 95% by mass, based on the total mass of the absorbent core. Is 60% by weight or more and 90% by weight or less, more preferably 70% by weight or more and 80% by weight or less.

  As in the present embodiment, the absorbent core 41 may contain a superabsorbent polymer (water absorbent polymer). The superabsorbent polymer is generally in the form of particles, but may be in the form of fibers. When a particulate superabsorbent polymer is used, its shape may be spherical, massive, bowl-like or amorphous. As the superabsorbent polymer, generally, polymers or copolymers of acrylic acid or alkali metal acrylates can be used. Examples include polyacrylic acid and its salts and polymethacrylic acid and its salts. As polyacrylates and polymethacrylates, sodium salts can be preferably used. In addition, acrylic acid or methacrylic acid to maleic acid, itaconic acid, acrylamide, 2-acrylamido-2-methylpropane sulfonic acid, 2- (meth) acryloyl ethane sulfonic acid, 2-hydroxyethyl (meth) acrylate or styrene sulfonic acid, etc. Copolymers obtained by copolymerizing the above comonomers to the extent that they do not degrade the performance of the superabsorbent polymer can also be used. The content of the superabsorbent polymer in the absorbent core is preferably 5% by mass to 50% by mass, more preferably 10% by mass to 40% by mass, still more preferably 15% by mass, based on the total mass of the absorbent core. More than 30 mass% or less. When the absorbent core 41 contains a highly water-absorptive polymer, the absorbent core 41 can more stably and rapidly absorb and hold a large amount of waste fluid such as blood. Moreover, you may mix | blend the deodorizer, an antimicrobial agent, etc. with the absorptive core 41 as needed. There is no restriction | limiting in particular in the compounding quantity of the deodorizer and antibacterial agent in the absorptive core 41, What is necessary is just to be the quantity normally mix | blended in the said technical field.

The method for incorporating the hemagglutinating agent into the component of the napkin such as the core wrap sheet 42 is not particularly limited. For example, the hemagglutinating agent containing a cationic polymer, water, ethanol, a mixture thereof, etc. The solution is dissolved in a solvent, attached as a solution to a desired part of a component, and then dried to remove the solvent. Coating of a hemagglutinating agent is used to manufacture a coated sheet such as a core wrap sheet 42. It is preferable from the viewpoint that it becomes easy to apply a hemagglutinating agent to a to-be-coated sheet | seat to a to-be-coated sheet in a desired density | concentration in order to carry out in a series of manufacturing lines continuous with a manufacturing process.
As a method of causing the solution to adhere to the constituent member, dropping of the solution to a predetermined place of the constituent member or various coating methods can be adopted. For example, application of a liquid to a predetermined location of a component using a known liquid coating apparatus such as a spray method, dipping method, transfer method, die coating, gravure coating, ink jet method, screen printing, etc. may be mentioned. . The drying may be any of drying by heating, drying by reduced pressure, and drying combining heating and reduced pressure, but may be natural drying instead of forced drying.

  In order to form the coagulant placement portion 9 and the coagulant non-placement portions 9N located on both sides of the skin side core wrap sheet 42a, it is possible to coat the hemagglutinating agent on the continuous band-like core wrap sheet. The hemagglutinating agent is applied only to the portion disposed in the central portion in the width direction of the absorbent body 4 in the width direction of the wrap sheet continuous body. The core wrap sheet continuum coated with the hemagglutinating agent is superposed on the absorbent core 41 to form a continuum of the absorbent body 4 and then cut into the dimensions of individual absorbent articles and incorporated into the napkin 1.

  In the napkin 1 of the present embodiment, as shown in FIGS. 1 and 2, lateral leak-proof grooves 81 extending in the longitudinal direction X on both sides of the longitudinal center line CL of the napkin 1 on the skin-facing surface of the napkin 1. , 81. The side leak-proof groove 81, 81 is formed at least in the discharge part facing part B, and in the discharge part facing part B, it extends in the longitudinal direction X on both sides sandwiching the discharge spot part P. The side leak-proof groove 81 preferably extends from the excretory part facing part B to the front part A or the rear part C, and as shown in FIG. 1, the front part A, the excretory part facing part B and It is more preferable to extend over the rear part C, but it may be formed only on the excretion part facing part B.

Moreover, the napkin 1 of this embodiment has the front leak-proof groove 82 and the back leak-proof groove 83 in the skin opposing surface of the napkin 1 on either side of the excretion spot part P. The front leak-proof groove 82 is formed in front of the excretory spot P and extends in the lateral direction Y of the napkin 1 transversely to the longitudinal center line CL. The rear leak-proof groove 83 is formed rearward of the excretory spot portion P, extends in the lateral direction Y of the napkin 1 transversely to the longitudinal center line CL.
It is preferable that the front leak-barrier groove 82 and the rear leak-barrier groove 83 cross at least the longitudinal center line CL of the napkin 1 in the lateral direction Y, respectively. As shown in FIG. 1, the front leak-proof groove 82 is preferably in the shape of an arc curved convexly toward the front, and the rear leak-proof groove 83 is in the shape of an arc curved convexly toward the rear Is preferred.
Here, with respect to the front leak-proof groove 82 and the rear leak-proof groove 83, extending in the lateral direction Y means extending generally in the lateral direction Y as a whole, and linearly extending in the lateral direction of the napkin 1 And may be convexly curved toward the front, or may be convexly curved toward the rear, and further, a convex curved portion toward the front and a convex curved portion toward the rear May be a leak-proof groove formed continuously in the lateral direction.

Each of the side leak-proof grooves 81, 81 has a center in a plan view shape which is convexly curved outward in the lateral direction Y at portions positioned on both sides in the lateral direction Y across the excretory spot portion P. A front arc-shaped portion 81a and a rear portion having an arc-shaped portion 81b and having a plan view shape which is convexly curved outward in the horizontal direction Y before and after the central arc-shaped portion 81b in the vertical direction X It has an arc-shaped portion 81c. Each of the side leak-proof grooves 81, 81 has a plan view shape in which the three arc-shaped portions 81a, 81b, 81c curved convexly outward in the lateral direction Y are three continuous in the longitudinal direction X The connecting portion between the central arc-shaped portion 81b and the front arc-shaped portion 81a and the connecting portion between the central arc-shaped portion 81b and the rear arc-shaped portion 81c have a pair of side leakage preventing grooves 81 It is a narrowed neck.
In addition, second lateral leak-proof grooves 84 are provided on the outer side in the lateral direction Y of the central arc-shaped portion 81b of the lateral leak-proof grooves 81, 81 respectively. The second side leakproof groove 84 has a plan view shape which is convexly curved outward in the lateral direction Y, similarly to the central arc-shaped portion 81b of the side leakproof groove 81. The central arcuate portion 81b of the side leakproof groove 81 and the second side leakproof groove 84 outside the side leakproof groove 81 are formed side by side in the lateral direction Y, and are formed substantially parallel to each other.
The side leak-proof groove 81, the front leak-proof groove 82, the rear leak-proof groove 83, and the second side leak-proof groove 84 are all the side leak-proof groove 81 and the second side leak-proof groove shown in FIG. Like 84, it is a leak-proof groove in which the surface sheet 2 and the absorber 4 were integrally dented, and each leak-proof groove is a surface, for example with respect to what accumulated the surface sheet 2 and the absorber 4 It can form by giving the embossing which accompanies pressurization or heating and pressurization integrally from the sheet | seat 2 side.

  In the napkin 1 of the present embodiment, the hemagglutinating agent disposed in the skin-side core wrap sheet 42 a is present in the excretory spot P in the transverse direction Y of the napkin 1 and as shown in FIG. The position is so as not to reach both lateral ends 4S in the horizontal direction, and in the longitudinal direction X, a position which exists in the excretory spot portion P and which exceeds the positions of the front leak-proof groove 82 and the rear leak-proof groove 83, respectively. Are distributed up to. More specifically, the skin-side core wrap sheet 42a has the coagulant placement portion 9 at the center of the absorber 4 in the lateral direction Y, and has coagulant non-placement portions 9N on the left and right sides thereof. . Further, in the present embodiment, the coagulant placement portion 9 extends continuously from the excretory spot P to a position beyond the front leak-proof groove 82, and in the front portion A, the front leak-proof groove 82 extends in the longitudinal direction X Longitudinal. The coagulant placement portion 9 extends continuously from the excretory spot P to a position beyond the rear leakproof groove 83, and longitudinally cuts the rear leakproof groove 83 in the rear portion C in the longitudinal direction X. The coagulant placement portion 9 preferably extends 1 cm or more from the front end of the front leak-proof groove 82 in the front end direction of the absorber 4, more preferably 2 cm or more, and 2 cm or more and absorbing It is further preferred that the end of the body 4 is reached. The coagulant placement portion 9 preferably extends 1 cm or more from the rear end of the front leak-proof groove 83 in the rear end direction of the absorber 4, more preferably 2 cm or more, and 2 cm or more It is further preferable that the extension and the rear end of the absorber 4 be reached.

The napkin 1 of the present embodiment is used by being fixed to the crotch portion or the like of the short, as in a normal sanitary napkin.
If menstrual blood is excreted in the excretory spot P of the napkin 1 during use, if it is small, it is absorbed from the excretory spot P into the absorber 4, but if it is repeatedly excreted or excreted in large amounts In menstrual blood, which is in contact with a hemagglutinating agent and separated into blood cell clumps and a liquid component with less redness (plasma component), the low viscosity plasma component gives priority to the side leaktight groove 81. , And flows in the longitudinal direction X and then is absorbed by the absorber 4.
Moreover, when the menstrual blood diffused in the longitudinal direction X reaches the front leak leakage groove 82 or the rear leak leakage groove 83, the reddish hemagglutinin is captured by the front leak leakage groove 82 or the rear leak leakage groove 83. As a result, the liquid component with less reddishness (plasma component) diffuses over the front leak-proof groove 82 or the rear leak-proof groove 83. The liquid component with little redness (plasma component) does not produce a reddish color even if it diffuses near the end of the absorbent body of the napkin 1, so the user who saw the napkin 1 after use sees the liquid from the end Do not worry or worry that it may have leaked. Moreover, in the case of an absorbent containing a superabsorbent polymer, the liquid component (plasma component) that diffuses across the front leak-proof groove 82 or the rear leak-proof groove 83 reduces the liquid absorbability to the surface of the water-absorbent polymer. Since a film of hemagglutinin, which may be a cause, is not formed, it is efficiently absorbed by the water-absorbent polymer, and liquid leakage from the longitudinal end of the absorber 4 hardly occurs. Furthermore, since the front leak-proof groove 82 and the rear leak-proof groove 83 respectively extend in the lateral direction Y, the blood plasma component is guided in the lateral direction Y, and along the lateral leak-proof groove 81 in some cases, Since it may be led from the part to the discharge part facing part B direction, liquid leakage from the longitudinal end of the absorber 4 is more difficult to occur.
By such an action, according to the napkin 1 of the present embodiment, it is possible to suppress liquid leakage from both ends in the lateral direction of the absorbent body, and at the same time, it is excellent in the diffusibility of the liquid in the longitudinal direction. Thus, it is possible to effectively utilize the absorption capacity of the above, and to prevent the user's fear of leakage due to the redness of hemagglutination occurring near the longitudinal end of the absorber. The absorption capacity of the absorber is the total absorption capacity originally possessed by the absorber, including the potential absorption capacity of the part that can absorb the liquid but does not absorb the liquid because the liquid does not reach it.

Having the hemagglutinating agent disposed so as not to reach both ends in the transverse direction Y of the absorber 4 has the advantage of reducing the redness of aggregates due to the aggregation of blood cells on the side of the napkin. From the viewpoint of obtaining such advantages and effects more reliably, the coagulant placement part 9 and the excretory part opposing part B, particularly, in the central part in the longitudinal direction of the excretory part opposing part B where the excretory spot part P is located, The distance Ln in the lateral direction Y between the both ends 4S and 4S in the lateral direction Y of the absorber 4 is preferably 10% or more, more preferably 20, of the full width W4 of the absorber 4 in the lateral direction Y at the site. % Or more, preferably 40% or less, more preferably 30% or less, and preferably 10% or more and 40% or less, more preferably 20% or more and 30% or less.
In addition, from the viewpoint of diffusing menstrual blood in the longitudinal direction X and enhancing the utilization efficiency of the absorber, aggregation occurs in the central part in the longitudinal direction of the excretory part opposing part B, particularly the excretory part opposing part B where the excretory spot part P is located. The length L9 of the transverse direction Y of the agent placement portion 9 is preferably 60% or more, more preferably 70% or more, and preferably 90% or less of the full width W4 of the transverse direction Y of the absorber 4 at the site. More preferably, it is 80% or less, and preferably 60% or more and 90% or less, more preferably 70% or more and 80% or less.

Further, from the viewpoint of effective utilization of the wide range of absorption capacity in the longitudinal direction X of the absorbent body 4, the front leak-proof groove 82 is provided on the front portion A located forward of the front end of the wing portion 7 as shown in FIG. Preferably, as shown in FIG. 3, the hemagglutinating agent is disposed from the excretory spot P to a position beyond the position of the front leak-proof groove 82. It is preferable that at least a part of the front leak-proof groove 82 where the coagulant placement part 9 is longitudinally cut is located at the front part A, and the whole is preferably located at the front part A.
In addition, from the viewpoint of effective utilization of the wide range of absorption capacity in the longitudinal direction X of the absorbent body 4, the rear leakage preventing groove 83 is a rear portion C located rearward of the rear end of the wing portion 7 as shown in FIG. It is preferable that the hemagglutinating agent is disposed from the excretory spot P to a position beyond the position of the rear leak-proof groove 83, as shown in FIG. It is preferable that at least a portion of the rear leak-proof groove 83 where the coagulant placement portion 9 is longitudinally cut is located at the rear portion C, and the whole is preferably located at the rear portion C.

From the viewpoint of ensuring one or more of the effects described above to be more reliably exhibited, the member on which the hemagglutinating agent such as the skin-side core wrap sheet 42 a is disposed has the longitudinal direction X of the coagulant placement portion 9 The length is preferably 50% or more, more preferably 60% or more, and preferably 100% or less, more preferably 90% or less, with respect to the entire length L4 in the longitudinal direction X of the absorber 4 Preferably it is 50% or more and 100% or less, more preferably 60% or more and 90% or less.
Further, in the absorbent body 4, the total length L4 in the longitudinal direction X is usually longer than the maximum length in the lateral direction Y, and the length of the longitudinal direction X is usually longer than the length in the lateral direction Y of the coagulant placement portion 9 as well. The length of the longitudinal direction X of the coagulant placement portion 9 is preferably 1.5 times or more, more preferably 2 times or more, preferably 10 times or less, more preferably 5 times the length of the transverse direction Y. Or less, preferably 1.5 times or more and 10 times or less, more preferably 2 times or more and 5 times or less.

In the napkin 1 of the present embodiment, as shown in FIG. 3, central arc-shaped portions 81 b of the side leak-proof groove 81 are formed on both sides of the longitudinal center line CL in the excretory part facing portion B, A second side leakproof groove 84 is formed on the outside of the direction. The coagulant placement portion 9 of the skin-side core wrap sheet 42 a reaches the side leak-proof groove 81 but does not reach the second side leak-proof groove 84.
As in the present embodiment, the second side leak-proof groove 84 is provided outside the side leak-proof groove 81, and the hemagglutinating agent is formed on the left and right sides of the excretory spot P, respectively. When arranged only inside 84, aggregates produced by blood cell aggregation are effectively captured by the side leakproof grooves 81 and the second side leakproof grooves 84, reducing redness on the napkin side it can.

  Furthermore, as shown in FIG. 3, on both the left and right sides of the excretory spot portion P, the hemagglutinating agent has a portion that reaches the side leakproof groove 81 and does not reach the second side leakproof groove 84. Also good. Having such a portion in the excretory part facing part B, the plasma component separated by blood cell aggregation effectively diffuses in the longitudinal direction X of the absorber, so that the absorber utilization efficiency is improved.

It is also preferable that the hemagglutinating agent is disposed only on the inner side with respect to the side leakproof groove 81 on each of the left and right sides of the excretory spot portion P, as shown in FIG. 4. The absence of the hemagglutinating agent at the site overlapping the lateral leak-proof groove 81 makes it difficult for the hemagglutination to collect in the lateral leak-proof groove 81 and improves the diffusivity of menstrual blood or plasma in the longitudinal direction X Do.
Such an effect is similarly exhibited even in the case where the second side leak-proof groove 84 is not provided.
In addition, two or more leakproof grooves extending in the longitudinal direction Y, such as the lateral leakproof groove 81 and the second lateral leakproof groove 84 shown in FIGS. In the case of having it, the leakproof groove on the inner side in the lateral direction Y close to the excretory spot portion P is taken as the side leakproof groove 81, and the leakproof groove on the outer side in the transverse direction Y is taken as the second side leakproof groove 84. In FIG. 4, the same components as those of the napkin 1 shown in FIG. 1 are denoted by the same reference numerals.

The side leak leakage grooves 81, 81 in the napkin 1 of the present embodiment are connected to each other via the front leak leakage grooves 82 at the end portions on the front part A side. The coagulant placement part 9 mentioned above is longitudinally cut. As a result, menstrual blood excreted in the excretory spot portion P and diffused in the planar direction is efficiently carried to the portion of the forward leak-barrier groove 82 overlapping the coagulant placement portion 9, and thereby, from the front end of the absorber 4. It is possible to prevent liquid leakage and the occurrence of redness near the front end more efficiently.
Further, in the side leak leakage grooves 81, 81 in the napkin 1 of the present embodiment, the end portions on the rear portion C side are connected via the rear leak leakage groove 83, and the entire rear leak leakage groove 83 or The coagulant placement portion 9 of which a part is described above is longitudinally cut. As a result, menstrual blood excreted in the excretory spot P and diffused in the planar direction is efficiently carried to the portion of the rear leak-proof groove 83 overlapping the coagulant placement portion 9, whereby from the rear end of the absorber 4 Liquid leakage and the occurrence of redness near the rear end can be prevented more efficiently.
Also, in any case, the plasma component separated by the hemagglutinating agent is easily delivered from the front leak-proof groove 82 extending in the lateral direction Y and the rear leak-proof groove 83 to the lateral leak-proof groove 81. Since the plasma component is easily moved to the side of the excretory part facing portion B in the longitudinal direction Y, and the entire surface of the absorber is easily used as an absorption area, the liquid leakage suppression is further improved.
From the viewpoint of preventing liquid leakage from the front and rear ends of the absorber 4 and generation of redness at both ends in the longitudinal direction of the absorber 4, the front leak-proof groove 82, the side leak-proof groove 81 and the rear leak-proof groove 83 are As shown in FIG. 3, it is further preferable to form an annular leak-proof groove 80 continuously.

  In the present invention, the side leakproof groove 81, the front leakproof groove 82, the rear leakproof groove 83 and the second side leakproof groove 84 are integrally embossed on the surface sheet 2 and the absorber 4 as described above. Although it can process and form, it is preferable that these leak-proof groove is a leak-proof groove which has a high pressing part and a low pressing part in a bottom part. Various arrangements of the high-pressure pressing part and the low-pressure pressing part provided at the bottom are known, and known ones can be used without particular limitation. Some examples of the leak-proof groove 8 which provided the high compression part 8b and the low compression part 8c in the bottom part 8a are shown in FIG. Each of the leakage preventing grooves shown in FIG. 1 and FIG. 5 uses an embossing roll provided with a protruding portion for forming high-pressure squeezed portion 8b further protruding at the tip of the protruding portion provided on the outer peripheral surface thereof. Between the embossing roll and the anvil roll, the top sheet and the absorber are integrally formed by heating and pressing.

  When the leak-proof groove has a high pressing part and a low pressing part at the bottom thereof, it is possible to achieve both improvement in the diffusion of plasma components and improvement in the capture of hemagglutination that causes redness. Therefore, if the side leak-proof groove 81, the second side leak-proof groove 84, the front leak-proof groove 82, and the rear leak-proof groove 83 have high-pressure squeezed portions and low-pressure squeeze portions at the bottom, they are generated by blood cell aggregation. The clumps are trapped in both the high pressing part and the low pressing part, but the plasma component can pass through the low pressing part and diffuse to the outside of the front leak-proof groove 82 and the rear leak-proof groove 83.

As the hemagglutinating agent to be used in the present invention, one having an action to agglutinate red blood cells in blood is used. The hemagglutinating agent used in the present invention is preferably capable of aggregating red blood cells in blood to form clumps of red blood cells and separating them from plasma components, and preferably has the following properties. That is, when 1000 ppm of the measurement sample agent is added to the simulated blood, at least two or more red blood cells are aggregated to form an aggregate while the fluidity of the blood is maintained. The simulated blood has a viscosity of 8 mPa · s measured using a B-type viscometer (Model TVB-10M, manufactured by Toki Sangyo Co., Ltd., measurement conditions: rotor No. 19, 30 rpm, 25 ° C., 60 seconds) Then, the blood cell-plasma ratio of defibrinated horse blood (manufactured by Japan Biotest Laboratories Co., Ltd.) was prepared.
The details of such a hemagglutinating agent are described in JP-A-2017-113513, and various kinds of hemagglutinating agents described therein can be used as the hemagglutinating agent of the present invention.

  The hemagglutinating agent preferably comprises a cationic polymer. Examples of the cationic polymer include cationized cellulose and cationized starch such as hydroxypropyltrimonium chloride starch. The hemagglutinating agent can also contain, as a cationic polymer, a quaternary ammonium salt homopolymer, a quaternary ammonium salt copolymer or a quaternary ammonium salt polycondensate. In the present invention, "quaternary ammonium salt" includes a compound having a positive charge at the position of nitrogen atom, or a compound that generates a positive charge at the position of nitrogen atom by neutralization. Specific examples thereof include salts of quaternary ammonium cations, neutralized salts of tertiary amines, and tertiary amines which are cationic in aqueous solution. The “quaternary ammonium site” described below is also used in the same meaning, and is a site that is positively charged in water. In the present invention, "copolymer" refers to a polymer obtained by copolymerization of two or more kinds of polymerizable monomers, and a binary copolymer and a copolymer of ternary or more Includes both things. In the present invention, the “polycondensate” is a polycondensate obtained by polymerizing a condensate composed of two or more monomers. When the hemagglutinating agent contains, as a cationic polymer, a quaternary ammonium salt homopolymer and / or a quaternary ammonium salt copolymer and / or a quaternary ammonium salt polycondensate, the hemagglutinating agent is selected from Any one of quaternary ammonium salt homopolymer, quaternary ammonium salt copolymer and quaternary ammonium salt polycondensate may be included, or any combination of two or more types may be included. It is also good. The quaternary ammonium salt homopolymers may be used alone or in combination of two or more. Similarly, quaternary ammonium salt copolymers can be used singly or in combination of two or more. Furthermore, similarly, quaternary ammonium salt polycondensates can be used singly or in combination of two or more. In the present specification, the term "hemagglutinating agent" refers to an agent capable of aggregating erythrocytes by a compound capable of aggregating erythrocytes of blood or a combination thereof, and further by a combination of compounds. That is, the hemagglutinating agent is an agent limited to those having a hemagglutination effect. Therefore, when the hemagglutinating agent contains the third component, it is referred to as a hemagglutinating agent composition and is distinguished from the hemagglutinating agent.

  Among the various cationic polymers described above, it is particularly preferred to use quaternary ammonium salt homopolymers, quaternary ammonium salt copolymers or quaternary ammonium salt polycondensates in view of the adsorptivity to erythrocytes. preferable. In the following description, for convenience, the quaternary ammonium salt homopolymer, the quaternary ammonium salt copolymer and the quaternary ammonium salt polycondensate are generically referred to as "quaternary ammonium salt polymer".

  The molecular weight of the cationic polymer is preferably 2,000 or more, more preferably 10,000 or more, and still more preferably 30,000 or more. When the molecular weight of the cationic polymer is at least these values, sufficient entanglement of the cationic polymer between red blood cells and crosslinking of the cationic polymer between red blood cells occur sufficiently. The upper limit value of the molecular weight is preferably 10,000,000 or less, more preferably 5,000,000 or less, and still more preferably 3,000,000 or less. When the molecular weight of the cationic polymer is less than or equal to these values, the cationic polymer dissolves well into the blood. The molecular weight of the cationic polymer is preferably 2,000 or more and 10,000,000 or less, more preferably 2,000 or more and 5,000,000 or less, still more preferably 2,000 or more and 3,000,000 or less, and 10,000 or more and 3,000,000 or less It is further more preferable, and it is particularly preferable that it is 30,000 or more and 3,000,000 or less. The molecular weight said to this invention is a weight average molecular weight, and the said molecular weight is measured in the measuring method and measuring condition as described in stage of Unexamined-Japanese-Patent No. 2017-113513.

  The cationic polymer preferably has a structure having a main chain and a plurality of side chains linked thereto. In particular, the quaternary ammonium salt polymer is preferably of a structure having a main chain and a plurality of side chains bonded thereto. The quaternary ammonium moiety is preferably present in the side chain. In this case, when the main chain and the side chain are bound at one point, the flexibility of the side chain is less likely to be inhibited, and the quaternary ammonium site present in the side chain smoothly on the surface of the red blood cell. It will be adsorbed. However, in the present invention, it is not prevented that the main chain of the cationic polymer and the side chain are connected at two or more points. In the present invention, “bonded at one point” means that one of carbon atoms constituting the main chain is singly bonded to one carbon atom located at the end of the side chain. . The phrase "bonded at two or more points" means that two or more of carbon atoms constituting the main chain are singly bonded to two or more carbon atoms located at the end of the side chain. Say.

  In the case where the cationic polymer has a structure having a main chain and a plurality of side chains bonded thereto, for example, a structure having a quaternary ammonium salt polymer having a main chain and a plurality of side chains bonded thereto In such a case, the carbon number of each side chain is preferably 4 or more, more preferably 5 or more, and still more preferably 6 or more. The upper limit of the number of carbon atoms is preferably 10 or less, more preferably 9 or less, and still more preferably 8 or less. For example, the carbon number of the side chain is preferably 4 or more and 10 or less, more preferably 5 or more and 9 or less, and still more preferably 6 or more and 8 or less. The carbon number of the side chain is the carbon number of the quaternary ammonium site (cation site) in the side chain, and even if carbon is contained in the anion which is the counter ion, the carbon can be counted. Not included. In particular, among the carbon atoms in the side chain, the number of carbon atoms from the carbon atom bonded to the main chain to the carbon atom bonded to the quaternary nitrogen is within the above-mentioned range. It is preferable because the steric hindrance when the polymer is adsorbed to the surface of the surface of erythrocytes is reduced.

  In addition to the polycation (cationic polymer), the hemagglutinating agent used in the present invention is a third component such as a solvent, a plasticizer, a fragrance, an antibacterial / deodorant, or a skin care agent. It may be in the form of a composition (hemagglutinant composition) contained above. As the solvent, water, a water-soluble organic solvent such as saturated aliphatic monohydric alcohol having 1 to 4 carbon atoms, a mixed solvent of the water-soluble organic solvent and water, or the like can be used. As the plasticizer, glycerin, polyethylene glycol, propylene glycol, ethylene glycol, 1,3-butanediol and the like can be used. As the flavor, a flavor having a green herbal-like odor described in Japanese Patent No. 4776407, an extract of a plant, an extract of citrus fruits, and the like can be used. Antibacterial and deodorant agents are polymerized from cancrinite-like minerals containing a metal having an antibacterial property described in Japanese Patent No. 4526271, and polymerizable monomers having a phenyl group described in Japanese Patent No. 4587928 Porous polymers, quaternary ammonium salts described in Japanese Patent No. 4651392, activated carbon, clay minerals and the like can be used. As skin care agents, plant extracts, collagen, natural moisturizing ingredients, moisturizers, keratin softeners, anti-inflammatory agents and the like described in Japanese Patent No. 4084278 can be used.

  The proportion of the cationic polymer in the hemagglutinating agent composition is preferably 1% by mass or more, more preferably 3% by mass or more, and still more preferably 5% by mass or more. The content is preferably 50% by mass or less, more preferably 30% by mass or less, and still more preferably 10% by mass or less. By setting the ratio of the cationic polymer in the hemagglutinant composition within this range, an effective amount of the cationic polymer can be provided to the absorbent article.

Hemagglutinating agents also include water soluble cationic polymers.
With regard to water soluble cationic polymers, "water soluble" means 0.05 g of a powdery or less than 1 mm thick film cationic polymer with a thickness of 0.5 mm or less in a 100 mL glass beaker (5 mm 50) 50 mL ion at 25 ° C. When added to and mixed with exchange water, a stirrer chip with a length of 20 mm and a width of 7 mm is placed, and the entire amount dissolves in water within 24 hours under stirring at 600 rpm using a magnetic stirrer HPS-100 manufactured by As One Corporation. It is In addition, as more preferable solubility, it is preferable that the whole quantity dissolves in water within 3 hours, and it is more preferable that the whole quantity dissolves in water within 30 minutes.

The amount of hemagglutinating agent per unit area (hereinafter, also referred to as basis weight) of the coagulant placement portion 9 is preferably 2 g / m ² or more, more preferably 4 g / m ² or more, and preferably 20 g / m ^2. m ² or less, more preferably 10 g / m ² or less, and 2 g / m ² or more and 20 g / m ² or less, more preferably 4 g / m ² or more and 10 g / m ² or less.
Here, when the hemagglutinating agent is a cationic polymer, the amount of hemagglutinating agent is a net amount of the cationic polymer, and the amount per hectare of the hemagglutinating agent is, for example, as follows: Is required.
[Measuring method]
After placing a solution in which the cationic polymer is dissolved, the solution is allowed to stand and dried under conditions of 30 ° C. and 10% RH for 24 hours, the coagulant placement part is cut out, its area is measured, By comparing the weights, it is calculated as the amount of hemagglutinating agent present per unit area to be contained after drying.

  As mentioned above, although this invention was demonstrated, this invention is not restrict | limited to embodiment mentioned above, It can change suitably in the range which does not deviate from the meaning of this invention. For example, instead of the ventral core wrap sheet, a hemagglutinating agent may be disposed in the surface sheet 2 or the sublayer in the mode shown in FIG. 3 or FIG.

Moreover, the absorbent article of the present invention may not have the second side leak-proof groove 84, and the hemagglutinating agent may be used to prevent the front leak-proof groove 82 and the rear leak-proof groove 83 from the excretory spot P. It may be disposed to a position beyond only one of them. Further, one or both of the front leak-proof groove 82 and the rear leak-proof groove 83 may not be continuous with the side leak-proof groove 81.
In addition, the absorbent article of the present invention may not have the side leak-proof sheet and the leak-proof mechanism thereby, and may not have the wing portion. In addition to the sanitary napkin, the absorbent article of the present invention may also be a panty liner (corrugated sheet) or the like.

Hereinafter, the present invention will be described in more detail by way of examples. However, the scope of the present invention is not limited at all by such examples.
Example 1
A sanitary napkin having a configuration similar to that of the sanitary napkin shown in FIGS. 1 and 2 was prepared, and this was used as the sanitary napkin of Example 1. An air-through non-woven fabric having a basis weight of 30 g / m ² is used as the top sheet, a non-moisture permeable polypropylene film having a basis weight of 28 g / m ² is used as the back sheet, and a basis weight of 20 g / m is used as the side leakproof sheet A spunbond nonwoven fabric of ² was used. As an absorbent body, a length of 186 mm in the longitudinal direction and 70 mm in the transverse direction is obtained by coating a core fiber sheet with a mixed fiber of a pulp fiber having a basis weight of 280 g / m ² and a superabsorbent polymer. The one of
The core wrap sheet is a sheet substrate made of cellulose fiber with a basis weight of 16 g / m ^{2 and} the hemagglutinating agent is applied to the portion covering the surface of the absorbent core facing the skin side, as shown in FIGS. The coating was applied so as to be distributed and then dried. In the obtained core wrap sheet, the coagulant placement portion 9 having a basis weight of 6 g / m ² of the cationic polymer was formed at the center in the lateral direction of the portion covering the skin facing surface side of the absorbent core.
As a hemagglutinating agent, "PAS-H-5L" manufactured by Nittobo Medical Ltd. was used. This hemagglutinating agent contains polyDADMAC (weight average molecular weight: 30,000) which is a water-soluble quaternary ammonium salt homopolymer.

Comparative Example 1
The coating width of the hemagglutinating agent is the same as in Example 1, and the range in which the hemagglutinating agent is applied is 10 mm on the inner side from the front leak-proof groove and 10 mm on the inner side from the rear leak-proof groove A sanitary napkin of Comparative Example 1 was produced in the same manner as in Example 1 except that the position was reached.

Comparative Example 2
A sanitary napkin of Comparative Example 2 was produced in the same manner as in Example 1 except that a core wrap sheet was used in which the above-described sheet substrate was not coated with the blood coagulant at all.

[Evaluation]
For each of the sanitary napkins of Examples and Comparative Examples, the absorption performance, the degree of utilization of the absorption capacity of the absorber, and the expression suppression property of redness at the end of the napkin were evaluated by the following methods, and the results thereof Is shown in Table 1.

<Absorption performance>
The dynamic maximum absorption was measured by the following method, and based on the measurement results, the absorption performance was evaluated by the following evaluation criteria.
(Measurement method of dynamic maximum absorption)
The sanitary napkin to be evaluated was fixed to a sanitary panty and attached to a dynamic model of the human body. As a dynamic model of the human body, a movable female waist model capable of walking and moving both legs was used. The walking motion of the dynamic model was started, and 2 g of simulated blood was injected from the fluid discharge point one minute after the start of the walking motion (first time). Furthermore, 3 g of simulated blood was injected 3 minutes after the end of the first liquid injection (second time). Furthermore, 2 g of simulated blood was injected 3 minutes after the end of the second liquid injection (third time). After the third injection, repeat the operation of injecting 2 g of pseudo blood 3 minutes after the liquid injection, and terminate the liquid injection operation when the pseudo blood exudes from the wing of the sanitary napkin, and injection up to that point The total weight of simulated blood was taken as the dynamic maximum absorption.
The simulated blood has a viscosity of 8 mPa · s measured using a B-type viscometer (Model TVB-10M, manufactured by Toki Sangyo Co., Ltd., measurement conditions: rotor No. 19, 30 rpm, 25 ° C., 60 seconds). A prepared blood cell-plasma ratio of defibrillated horse blood (manufactured by Japan Biotest Laboratories Co., Ltd.) was used.

(Evaluation criteria)
The absorption performance of each sanitary napkin was evaluated based on the measurement values of the dynamic maximum absorption based on the following criteria. The larger the dynamic maximum absorption amount, the better the menstrual blood absorption performance.
A: Dynamic maximum absorption 13 g or more B: Dynamic maximum absorption 13 g

<Degree of utilization of absorption capacity of absorber>
The absorber diffusion area was measured by the following method, and based on the measurement result, the degree of utilization of the absorption capacity of the absorber was evaluated by the following evaluation criteria.
(Measurement method of absorber diffusion area)
Each sanitary napkin was fixed on an acrylic plate, and 3 g of simulated blood was injected into the portion corresponding to the fluid drainage spot P, and allowed to stand for 3 minutes after completion of fluid injection, and 3 g of simulated blood was injected again after standing for 3 minutes. . After repeating this pseudo blood and the operation of standing for 3 minutes until 9 g of blood is injected, it is observed from the surface sheet side, and the area of the portion where menstrual blood is spread with the absorber is measured, and the absorber diffusion area And

(Evaluation criteria)
For each sanitary napkin, the degree of utilization of the absorption capacity of the absorber was evaluated based on the absorber diffusion area according to the following criteria. As the absorber diffusion area is larger, the absorber material of the absorber is used for absorption, which indicates that the degree of utilization of the absorption capacity of the absorber is higher. However, if the absorber diffusion area is more than 70 cm ² , it may reach the end in the longitudinal or width direction of the absorber, indicating that the possibility of liquid leakage from the absorber is increased. .
A: Absorber diffusion area is 50 cm ² or more and 70 cm ² or less B: Absorber diffusion area is less than 50 cm ²

<Reducing redness at the end of the napkin>
Each sanitary napkin is fixed to an acrylic plate placed horizontally, and 3 g of simulated blood is injected from the location equivalent to the excretory spot P, and left to stand for 3 minutes from the end of liquid injection, and after standing for 3 minutes, simulated 3 g again. Blood was infused. After repeating this artificial blood and the operation of standing for 3 minutes until 9 g of blood is injected, using a color difference meter, the spot corresponding to the excretory spot P (the center in the longitudinal direction and the lateral direction of the excretory part facing part B L ^* value a ^* value was measured at each of longitudinal end portions of the absorber at positions corresponding to the excretory spot portion P and the position in the horizontal direction Y, and redness was confirmed. As a color difference meter, NF333 manufactured by Nippon Denshoku Kogyo Co., Ltd. was used.

(Evaluation criteria)
About each sanitary napkin, the expression suppression property of the redness in the napkin edge part was evaluated based on the following reference | standard based on L ^* value a ^* value in the edge part of the longitudinal direction of an absorber. The larger the L * value at the end, the better the suppression of reddish development at the longitudinal end of the napkin.
○: L ^* value 65 or more and a ^* value less than 5 Δ: L ^* value 60 or more and less than 65, or a ^* value 5 or more and less than 10 ×: L ^* value less than 60, or a ^* value 10 or more

  According to the results in Table 1, compared with the sanitary napkin of Comparative Example 2, the sanitary napkin of Example 1 shows the absorption performance, the degree of effective utilization of the absorption capacity of the absorbent, and the end of the absorbent. The degree of suppression of redness expression is improved, and the degree of effective utilization of the absorbent capacity of the absorber and the suppression of redness expression at the end of the absorber compared to the sanitary napkin of Comparative Example 1 The quality is improved. From this, by arranging the hemagglutinating agent from the excretory spot portion to a position beyond the front leak leakage groove or the rear leak leakage groove, the absorption performance can be enhanced, and redness at the end of the absorber It can be seen that the absorption capacity of the absorber can be effectively used by suppressing the expression of

1 Sanitary napkin (absorbent article)
Reference Signs List 2 front sheet 3 back sheet 4 absorber 41 absorbent core 42 core wrap sheet 42a skin side core wrap sheet (core wrap sheet covering the skin facing surface side of the absorbent core)
5 Absorbent Main Body 6 Side Leakage Sheet 7 Wing Part 8 Leakage Groove 81 Side Leakage Groove 82 Forward Leakage Groove 83 Rear Leakage Groove 84 Second Side Leakage Groove 9 Coagulant Placement Part A Front Part B Excretion Head opposite part P Excretion spot part C Rear part

Claims (7)

A liquid-permeable top sheet forming the skin-facing surface, a back sheet forming the non-skin-facing surface, and an absorber disposed between the two sheets, the longitudinal direction along the longitudinal direction of the wearer and the longitudinal direction An absorbent article for menstrual blood absorption having a transverse direction perpendicular to the
As the leak-proof groove in which the surface sheet and the absorber are integrally recessed, the liquid discharge portion of the wearer is formed on the left and right sides across the discharge spot portion facing each other, and the side extending in the vertical direction A leak-proof groove, and front and rear leak-proof grooves which are formed on the front and back of the excretory spot portion and extend in the lateral direction,
A hemagglutinating agent is disposed on a member which forms the surface of the absorbent body on the side facing the skin or is positioned on the side opposite to the skin from the absorbent, and the hemagglutinating agent is disposed in the lateral direction. And are disposed so as not to reach both lateral ends of the absorber in the excretory spot portion, and exist in the excretory spot portion in the longitudinal direction, and the front and rear leak-proof grooves An absorbent article disposed to a position beyond at least one side.   The absorbent article has a pair of wings, and the front leak-proof groove and the rear leak-proof groove are located forward of the front end of the wing and behind the rear end of the wing The absorbent article according to claim 1, wherein the absorbent article is formed in the rear part.   A second lateral leak-proof groove extending along the lateral leak-proof groove is provided outside the lateral leak-proof groove in the lateral direction, and the hemagglutinating agent is formed on the left and right of the excrement spot portion. The absorbent article according to claim 1, wherein the absorbent article is disposed only on the inner side of the second side leakproof groove on both sides.   The absorbent article according to claim 1 or 2, wherein the hemagglutinating agent is disposed only on the inner side of the side leakproof groove on each of the left and right sides of the excretory spot portion.   5. The side leak-proof groove and the front leak-proof groove are continuous, or the side leak-proof groove and the rear leak-proof groove are continuous. The absorbent article as described in.   Among the front leak-proof groove and the rear leak-proof groove, the leak-proof groove and the side leak-proof groove are continuous with one in which the hemagglutinating agent is present beyond the leak-proof groove. The absorbent article according to any one of 4.   The absorbent article according to any one of claims 1 to 6, wherein the leakage preventing groove has a high pressing part and a low pressing part at the bottom.

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