WO2020008610A1

WO2020008610A1 - Absorbent article

Info

Publication number: WO2020008610A1
Application number: PCT/JP2018/025598
Authority: WO
Inventors: 良輔山崎; 祐一廣瀬; 啓介長島
Original assignee: 花王株式会社
Priority date: 2018-07-05
Filing date: 2018-07-05
Publication date: 2020-01-09
Also published as: JPWO2020008610A1; CN110913818A; CN110913818B; JP6494889B1

Abstract

The present invention addresses the problem of providing an absorbent article capable of suppressing the accumulation of malodorous components in the vicinity of the wearer's skin while being worn and capable of being used in a sanitary manner without concern about odors derived from excrement. An absorbent body (4) in an absorbent article (1) is configured to include a liquid-retaining absorbent core (40) and a core wrap sheet (53) that covers the skin-facing surface and the non-skin-facing surface of the absorbent core (40), an antimicrobial agent being contained in the core wrap sheet (53). In the absorbent core (40), lateral connecting passages 6 (60, 61) that have openings in the skin-facing surface and/or non-skin-facing surface of the absorbent core (40) and extend in the lateral direction Y are arranged continuously from one end to the other end of the absorbent core 40 along the lateral direction Y.

Description

Absorbent articles

The present invention relates to an absorbent article having an antibacterial function.

In absorbent articles such as sanitary napkins, if there is a gap between the wearer and the wearer's skin is insufficient, excretions such as menstrual blood will flow to the buttocks and the like along the skin surface, It may lead to liquid leakage. On the other hand, in the absorbent core in the absorbent article, a thick portion thicker than the peripheral portion is formed at a portion opposed to the excretion portion such as the vaginal opening of the wearer to face the skin. There is known a technique for improving the fit of the absorbent article to the body by preventing the liquid from leaking. Also, a block-shaped absorbent core provided with a groove-shaped space extending in a planar direction is known (Patent Documents 1 and 2).

In the case of absorbent articles, the unpleasant odor due to excrement during wearing is a problem that is bothersome to the wearer and the surrounding people. Conventionally, in order to solve this problem, a deodorant or an antibacterial agent is blended into the absorbent article. For example, Patent Literature 3 discloses that a core wrap sheet covering an absorbent core contains a cationic antibacterial agent and a pH buffering deodorant, and elutes these agents in a permeation passage of excreta, thereby providing a sustained release. A technique for achieving the deodorizing effect is described. Patent Literature 4 also discloses a central height in which a high basis weight portion and a low basis weight portion are alternately formed in the longitudinal or lateral direction at the laterally central portion of the absorbent core in the excretion portion-facing portion of the absorbent article. It is described that a ventilation area is provided, and a deodorant sheet containing a deodorant such as activated carbon is disposed between the absorbent core and the back sheet in the central high ventilation area. According to the absorbent article described in Patent Literature 4, the odor component contained in menstrual blood flows through the absorbent core having improved air permeability and is efficiently adsorbed on the deodorant sheet. It is said that particularly excellent deodorizing performance can be obtained even when used not only at the time when the amount is large but also when the amount of menstrual blood is small.

JP 2016-119982 A International Patent Publication No. WO 2016/064994 JP 2016-169446 A JP 2016-120192 A

According to the absorbent article of the prior art, when a malodorous component is generated during the wearing of the absorbent article, the malodorous component is infinitely around the skin of the wearer, such as between the absorbent article and the skin of the wearer. If it stays, unsanitary environments may be left unattended, causing skin troubles.Also, the accumulation and deterioration of odorous components may cause odors to become more severe, causing stress on the wearer. There is also a possibility that

Therefore, an object of the present invention is to provide an absorbent article that can solve the above-mentioned disadvantages of the related art. Specifically, it is intended that an odorous component accumulates around the wearer's skin during wearing. The present invention relates to providing an absorbent article that can be suppressed and that can be used hygienically without worrying about odors derived from excrement.

The present invention has a vertical direction corresponding to the wearer's front-rear direction and a horizontal direction perpendicular thereto, and in the vertical direction, an excretion part opposing part including an excretion spot part disposed opposite to the excretion part of the wearer. A front portion disposed on the abdomen side of the wearer relative to the excretion portion facing portion, and a rear portion disposed on the back side of the wearer than the excretion portion facing portion, forming a skin-facing surface. An absorbent article comprising a top sheet, a back sheet forming a non-skin facing surface, and an absorber located between these two sheets, wherein the absorber has a liquid-retentive absorbent core, A core wrap sheet for covering the skin-facing surface and the non-skin-facing surface of the absorbent core, wherein the core wrap sheet contains an antibacterial agent, and the absorbent core contains a skin of the absorbent core. At least one of the facing surface and the non-skin facing surface has an opening and extends in the lateral direction Communication path is an absorbent article being arranged continuously over the other end from the side end of the absorbent core.

ADVANTAGE OF THE INVENTION According to this invention, the absorptive article which can suppress that a bad odor component accumulates around a wearer's skin during wear, and can be used hygienically without minding the odor derived from excrement is provided. You.

FIG. 1 is a perspective view showing a skin-facing surface side (top sheet side) of a sanitary napkin which is one embodiment of the absorbent article of the present invention. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. 1 (a cross section at the same position as line II in FIG. 4). FIG. 3 is a longitudinal sectional view schematically showing a section taken along line II-II of FIG. FIG. 4 is a plan view showing the non-skin-facing surface side of the absorbent core in the sanitary napkin of FIG. FIG. 5 is a perspective view showing the non-skin-facing surface side of the absorbent core in the sanitary napkin of FIG. FIG. 6 is a plan view showing a skin-facing surface side (top sheet side) of a sanitary napkin as another embodiment of the absorbent article of the present invention.

Hereinafter, the absorbent article of the present invention will be described based on preferred embodiments with reference to the drawings. 1 to 3 show a sanitary napkin 1 which is an embodiment of the absorbent article according to the present invention. The napkin 1 includes a top sheet 2 forming a skin-facing surface, a back sheet 3 forming a non-skin-facing surface, and a liquid-retentive absorber 4 located between the two

sheets

2 and 3.

In the present specification, the “skin-facing surface” is a surface of the absorbent article or a component thereof (for example, the absorbent body 4) that faces the wearer's skin side when the absorbent article is worn, that is, the surface of the wearer relatively. The side close to the skin, the "non-skin-facing surface" refers to the side of the absorbent article or its components opposite to the skin side when the absorbent article is worn, that is, the side relatively far from the skin of the wearer. It is a face that can be. In addition, "at the time of wearing" here means the state where the normal appropriate wearing position, ie, the correct wearing position of the said absorbent article was maintained.

As shown in FIG. 1, the napkin 1 corresponds to the front-back direction of the wearer, and has a vertical direction X extending from the wearer's abdomen to the back side via the crotch portion and a horizontal direction Y orthogonal to the wearer. In the vertical direction X, an excretory portion facing portion B including an excretory spot portion (not shown) facing the excretory portion, such as the vaginal opening of the wearer, and the wearer's ventral side with respect to the excretory portion facing portion B The front part A is disposed on the (front side) and the rear part C is disposed on the back side (rear side) of the wearer with respect to the excretion part facing part B. In the following description, unless otherwise specified, the vertical direction X is the vertical direction X of the absorbent article or a direction along the vertical direction X of the absorbent article in its constituent members, and the horizontal direction Y is the horizontal direction of the absorbent article. It is the direction along the lateral direction Y of the absorbent article in the direction Y or its constituent members.

As shown in FIG. 1, the napkin 1 includes an absorbent main body 5 having a shape elongated in the vertical direction X and outer sides in the horizontal direction Y from both sides along the vertical direction X of the excretion part facing portion B of the absorbent main body 5. And a pair of

wing portions

11, 11 extending to the front. The absorbent main body 5 is a main part of the napkin 1 and includes the top sheet 2, the back sheet 3 and the absorbent body 4, and has a front part A, an excretion part facing part B and a rear part C in the vertical direction X. Is divided into three.

In the absorbent article of the present invention, when the absorbent article has a wing portion as in the napkin 1 shown in FIG. In the napkin 1 as an example, it is sandwiched between the base of one wing 11 along the vertical direction X and the base of the other wing 11 along the vertical X. Area. Although not shown, the excretion part-facing portion in the absorbent article having no wing portion is a vertically central area when the absorbent article is divided into three equal parts in the vertical direction. is there.

表面 As shown in FIGS. 1 to 3, the topsheet 2 covers the entire surface of the absorber 4 facing the skin. On the other hand, the back sheet 3 covers the entire area of the non-skin-facing surface of the absorber 4, and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorber 4. 13 together with the side flap portion 10. The side flap portion 10 is a portion formed of a member extending outward from the absorber 4 in the lateral direction Y. The back sheet 3 and the side leakage prevention sheet 13 are joined to each other at a portion extending from both side edges along the longitudinal direction X of the absorber 4 by a known joining means such as an adhesive, a heat seal, and an ultrasonic seal. I have. In the napkin 1, the absorber 4 is thus sandwiched between the topsheet 2 and the backsheet 3, and the topsheet 2 or the side leakage-preventing sheet 13 and the backsheet 3 are joined around the entire outer edge of the napkin 1. I have. Any bonding means such as an adhesive, a heat seal, an ultrasonic seal, or the like is used for bonding between the sheets constituting the napkin 1.

As shown in FIG. 1, the side flap portions 10 protrude greatly outward in the lateral direction Y at the excretion portion facing portion B, and thereby a pair of left and right sides along the longitudinal direction X of the absorbent main body 5 are provided. The

wing portions

11 and 11 are extended. The non-skin-facing surface of the wing portion 11 is provided with a wing adhesive portion (not shown) for fixing the wing portion 11 to clothing such as shorts. The wing portion 11 is used by being folded back to the non-skin facing surface (outer surface) side of the crotch portion of clothes such as shorts. The wing adhesive portion is covered with a release sheet (not shown) made of a film, nonwoven fabric, paper or the like before use.

As shown in FIG. 1, a pair of side

leakage prevention sheets

13, 13 is provided on each skin-facing surface side at both ends in the horizontal direction Y of the topsheet 2 (that is, both side edges along the vertical direction X of the topsheet 2). Is arranged. The side leakage prevention sheet 13 forms the skin facing surface of the napkin 1 together with the top sheet 2. The pair of side

leakage prevention sheets

13 and 13 are respectively disposed over substantially the entire length of the absorbent main body 5 in the vertical direction X, and are relatively close to a horizontal center line CLy that bisects the napkin 1 in the horizontal direction Y. It has an inner end 13a and an outer end 13b relatively far from the horizontal center line CLy. The inner end 13a of the side leakage prevention sheet 13 overlaps the end in the horizontal direction Y of the absorber 4 (absorbent core 40) in plan view (that is, the side edge along the longitudinal direction X of the absorber 4). That is, it overlaps the end of the absorber 4 in the lateral direction Y in the thickness direction. The outer end portion 13b of the side leakage prevention sheet 13 is located outside the absorber 4 in the lateral direction Y. The side leakage prevention sheet 13 is joined to the top sheet 2 or the back sheet 3 by a known joining means such as an adhesive at a position outside the inside end 13a in the lateral direction Y, and the inside end 13a is As shown in FIG. 2, it is not fixed to the topsheet 2 and is a free end.

One or more elastic members may be arranged in the longitudinal direction X at the inner end (free end) 13 a of the side leakage prevention sheet 13. In this case, when the napkin 1 is worn, the contraction force of the elastic member causes the inner end portion 13a of the side leakage prevention sheet 13 to stand up toward the wearer's skin side to form a leakage prevention cuff. The leak prevention cuff is effective in preventing lateral leakage of excrement such as menstrual blood excreted on the skin-facing surface of the napkin 1.

As the top sheet 2, the back sheet 3, and the side leakage prevention sheet 13, various kinds of substances conventionally used for absorbent articles such as sanitary napkins can be used without any particular limitation. As the topsheet 2, a non-woven fabric having liquid permeability or a perforated film can be used. As the back sheet 3, a liquid-impermeable film made of a synthetic resin or a water-repellent nonwoven fabric having a high water pressure resistance such as a spunbond-meltblown-spunbond laminated nonwoven fabric can be used. As the side leakage prevention sheet 13, a water-repellent nonwoven fabric having high water pressure resistance, for example, a spunbond-meltblown-spunbond laminated nonwoven fabric or the like can be used.

The absorbent body 4 includes a liquid-retentive absorbent core 40, a skin-side core wrap sheet 51 covering the skin-facing surface of the absorbent core 40, and a non-skin-side core covering the non-skin facing surface of the absorbent core 40. The wrap sheet 52 is included. In the present embodiment, the absorbent core 40 and thus the napkin 1 are formed symmetrically with respect to a horizontal center line CLy (see FIG. 1) that bisects the absorbent main body 5 in the horizontal direction Y. The absorbent core 40 in the napkin 1 is made of a fiber assembly made of a fiber material such as pulp fiber, or a fiber assembly in which a water-absorbing polymer is held. The

core wrap sheets

51 and 52 have a role of preventing leakage of the material forming the absorbent core 40 and improving the shape retention of the absorbent core 40. The front sheet 2 and the skin-side core wrap sheet 51 and the back sheet 3 and the non-skin-side core wrap sheet 52 are joined to each other by a pattern-coated adhesive such as dots, spirals, and stripes. Is preferred.

In the present embodiment, the skin-side core wrap sheet 51 and the non-skin-side core wrap sheet 52 are each a part of one core wrap sheet 53, and the sheet 53 is as shown in FIGS. 2 and 3. In addition, the surface (outer surface) of the absorbent core 40 is covered such that the overlapping portion 54 between both ends in the lateral direction Y is located on the non-skin-facing surface of the absorbent core 40 (the absorber 4). . The overlapping portion 54 is located at the center of the absorber 4 in the lateral direction Y.

More specifically, the core wrap sheet 53 is a fiber sheet having a width that is at least twice and at most three times the length of the absorbent core 40 in the lateral direction Y, and whose length (width) in the lateral direction Y is relatively long. And covers the entire area of the skin-facing surface of the absorbent core 40 and extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent core 40, and the extended portion is The absorbent core 40 is wound down below and covers the entire non-skin-facing surface of the absorbent core 40. In this one core wrap sheet 53, the portion covering the skin facing surface of the absorbent core 40 is the skin side core wrap sheet 51, and the portion covering the non-skin facing surface of the absorbent core 40 is the non-skin side core. In the present embodiment, the skin-side core wrap sheet 51 and the non-skin-side core wrap sheet 52 are the same. The basis weight of the core wrap sheet 53 is preferably 5 g / m ² or more, more preferably 10 g / m ² or more, and preferably 40 g / m ² or less, more preferably 30 g / m ² or less.

The core wrap sheet 53 is typically a sheet material such as nonwoven fabric or paper mainly composed of hydrophilic fibers. As the hydrophilic fibers contained in the core wrap sheet 53, natural fibers such as wood pulp such as softwood pulp and hardwood pulp, and non-wood pulp such as cotton pulp and hemp pulp; modified pulp such as cationized pulp and mercerized pulp; Regenerated fibers such as cupra and rayon; semi-synthetic fibers such as acetate; hydrophilic synthetic fibers such as polyvinyl alcohol fiber and polyacrylonitrile fiber; The fibers may be used alone or in combination of two or more. Typical examples of the hydrophilic fibers in the core wrap sheet 53 include natural fibers, regenerated cellulose-based fibers, and semi-synthetic fibers. The core wrap sheet 53 may further include synthetic fibers (hydrophobic fibers), for example, thermoplastic fibers, in addition to the hydrophilic fibers. As the thermoplastic fiber, for example, a single fiber formed using a single synthetic resin such as polyethylene, polypropylene, polyester, and polyurethane, or formed using a synthetic resin such as a composite of two or more of these. A conjugate fiber, for example, a conjugate fiber such as a core-sheath type or a side-by-side type formed using two or more kinds of synthetic resins can also be used.

The core wrap sheet 53 is provided with an antibacterial agent. In the present embodiment, the antibacterial agent is disposed on the entire core wrap sheet 53, and thus the antibacterial agent is disposed on both the skin side core wrap sheet 51 and the non-skin side core wrap sheet 52. It may be arranged on only one of 51 and 52. When the antibacterial agent is disposed on at least the skin-side core wrap sheet 51, the antibacterial agent disposed on the sheet 51 is dissolved or dispersed in the excrement that has moved the sheet 51 in the thickness direction, and the antibacterial agent is dispersed. This is preferable because the excrement contained therein can be absorbed into the interior of the absorbent core 40 and exhibit an antibacterial action. The antibacterial agent contained in the core wrap sheet 53 will be described later in detail.

One of the main features of the napkin 1 is that, as shown in FIGS. 2 to 5, the absorbent core 40 has an opening in at least one of the skin-facing surface and the non-skin-facing surface of the absorbent core 40 and has a lateral surface. The horizontal communication passage 6 extending in the direction Y is provided continuously from one end to the other end of the absorbent core 40 in the horizontal direction Y. In the present embodiment, the convex horizontal communication passage 60 and the horizontal groove 61 as the horizontal communication passage 6 are arranged on the non-skin facing surface (the surface facing the back sheet 3) of the absorbent core 40, and each of the absorbent core 40 It extends over the entire length in the lateral direction Y of the non-skin-facing surface.

The lateral communication passage according to the present invention may have an opening in at least one of the skin-facing surface and the non-skin-facing surface of the absorbent core, and a) the convex horizontal communication passage 60 and the lateral groove 61 of the present embodiment. The absorbent core may have an opening in only one of the skin-facing surface and the non-skin-facing surface of the absorbent core and have a bottom on the side opposite to the opening (so-called “dent” or “dent”). As in the lateral through hole 62 (see FIG. 6) of the embodiment, a form having an opening in both the skin facing surface and the non-skin facing surface of the absorbent core (so-called “through hole” or “slit”) may be used. Further, the horizontal communication passage according to the present invention may be disposed continuously from one end to the other end in the horizontal direction Y of the absorbent core 40, and the shape in plan view is not particularly limited. The shape may be linear, or may be convex outward (in a direction away from the center of the absorbent core 40 in the vertical direction X) in the vertical direction X, such as the convex horizontal communication passage 60. The convex horizontal communication passage 60 has a V-shape in plan view, and another example of the convex shape includes a U-shape.

Since the napkin 1 has the horizontal communication passage 6 (60, 61) that traverses the absorbent core 40 in the horizontal direction Y, during the wearing thereof, menstrual blood flow or the like occurs between the napkin 1 and the wearer's skin. Even if excrement-derived malodorous components are generated, the malodorous components are quickly released to the outside of the napkin 1 through the horizontal communication passage 6. Therefore, according to the napkin 1, the inconvenience due to the odor component staying between the napkin 1 and the skin of the wearer for a long time, for example, a skin trouble caused by the odor component, or the odor becomes more severe, and the The generation of stress on the wearer due to the release is effectively prevented. In addition, as described above, the napkin 1 is provided with an antibacterial agent on the core wrap sheet 53 covering the outer surface of the absorbent core 40, so that bacteria inside the absorbent core 40, which is a main cause of offensive odor, are formed. Breeding can be effectively prevented. The antibacterial function of the antibacterial agent and the function of releasing the malodorous component by the horizontal communication passage 6 allow the user to use the apparatus in a sanitary manner without worrying about the odor derived from the excrement. Further, since the excrement is easily diffused in the lateral direction Y by the horizontal communication passage 6, an increase in the chance of contact between the excrement and the antibacterial agent contained in the core wrap sheet 53 is promoted, and propagation of bacteria is easily suppressed. Therefore, the generation amount of the offensive odor component itself is easily suppressed, so that the odor released to the outside of the napkin 1 does not easily reach a level of concern.

2) As shown in FIGS. 2 to 5, the absorbent core 40 in the present embodiment has a standard absorbing portion 41 and a thick portion 42 having a larger thickness than the standard absorbing portion 41. The thick portion 42 preferably exists at least in the excretory portion facing portion B. In the present embodiment, the thick portion 42 extends from a portion of the front portion A near the excretory portion facing portion B to a portion of the rear portion C near the excretory portion facing portion B. Extending. The thick portion 42 has a hexagonal shape in plan view, and protrudes toward the back sheet 3, that is, the side opposite to the skin side of the napkin 1 wearer. In this embodiment, as described above, the non-skin-facing surface of the absorbent core 40 has irregularities, whereas the skin-facing surface of the absorbent core 40 is microscopically fixed to the fixed region 8 described later. It can be said that it has irregularities due to the presence of a concave portion as a fixing portion, but it is macroscopically flat without a relatively large raised portion such as the thick portion 42. As described above, since the thick portion 42 exists on the non-skin-facing surface side of the topsheet 2, as shown in FIG. Ridge 15 protruding toward the skin side of the user.

The absorbent core 40 in the present embodiment is formed by partially varying the amount of deposit (basis weight) of the material (fiber material, water-absorbing polymer, etc.) of the absorbent core 40, and the deposition of the material A portion having a relatively small amount is the standard absorption portion 41, and a portion having a relatively large amount of the forming material is the thick portion 42. The thick portion 42 has a greater basis weight as well as a thickness compared to the standard absorption portion 41. The basis weight of the thick portion 42 is preferably 300 g / m ² or more, more preferably 350 g / m ² or more, and preferably 700 g / m ² or less, more preferably 650 g / m ² or less. The length in the vertical direction X of the thick portion 42 is preferably 30% or more, more preferably 35% or more, and preferably 70% or less, more preferably, with respect to the entire length of the absorbent core 40 in the vertical direction X. Is 65% or less. The maximum length of the thick portion 42 in the vertical direction X is preferably 100 mm or more, more preferably 110 mm or more, and preferably 150 mm or less, more preferably 140 mm or less.

In the present embodiment, as shown in FIGS. 2 to 5, on the non-skin-facing surface of the absorbent core 40, the convex horizontal communication passage 60 as the horizontal communication passage 6 is vertically adjacent to the thick portion 42. A pair is provided on each of the front side and the rear side in the direction X. Then, as shown in FIGS. 2 and 3, in the step portion 43 caused by the thickness difference between the standard absorbing portion 41 and the thick portion 42, the non-skin side core covering the absorbent core 40 and the non-skin facing surface thereof A space S exists between the lap sheet 52 and the wrap sheet 52. As described above, the horizontal communication passage 6 traverses the non-skin-facing surface in the lateral direction Y along the step 43 of the non-skin-facing surface of the absorbent core 40, and the step 43 and the non-skin-side core covering the same. Due to the presence of the space S between the lap sheet 52 and the space S, the space S having a relatively large volume including the space in the horizontal communication passage 6 has a relatively large excrement absorption capacity and becomes a major source of offensive odor. Since the space S is formed along the easily thick portion 42, the space S functions as a discharge path of the malodorous component, and the malodorous component can be rapidly released to the outside. In the present embodiment, each of the pair of convex-shaped horizontal communication passages 60 has a V-shape convex outward in the vertical direction X in a plan view of the absorbent core 40 as shown in FIG. , The top of the V-shape is located at the center in the horizontal direction Y.

In particular, as shown in FIGS. 4 and 5, the thick portion 42 in the present embodiment exists over the entire length of the absorbent core 40 in the lateral direction Y, that is, the lateral direction Y of the thick portion 42 (the step portion 43). Are located at the same position in the horizontal direction Y as that of the absorbent core 40, so that the space S functioning as the emission path of the offensive odor component is a relatively large space. The absorbent core 40 crosses the absorbent core 40 in the lateral direction Y along the step portion 43 with a capacity, and is excellent in a function of releasing a malodorous component.

Further, in the present embodiment, the horizontal communication passage 6 arranged along the step portion 43 has a convex shape outward in the vertical direction X in plan view as shown in FIG. 4, more specifically, a V-shape. Since the horizontal communication passage 60 is formed in a convex shape, the space capacity of the space S is larger than that in the case where the horizontal communication passage 6 arranged along the step 43 is linear in plan view such as the horizontal groove 61. Therefore, the bad odor component can be released to the outside more quickly in combination with the above-described operation and effect due to the existence of the thick portion 42 (the step portion 43) over the entire length of the absorbent core 40 in the lateral direction Y. In addition, since the excrement is easily diffused not only in the horizontal direction Y but also in the outer direction in the vertical direction X, the excrement is easily brought into contact with the antibacterial agent of the core wrap sheet 53 over a wide area of the absorber 4, and an odor component Can be enhanced.

In the present embodiment, as shown in FIGS. 2, 4 and 5, the absorbent core 40 is provided with a vertical groove 7 extending outward from the convex horizontal communication passage 60 in the vertical direction X. It is arranged from the communication path 60 to the longitudinal end of the absorbent core 40. The vertical grooves 7 are linear in plan view, and a plurality of the vertical grooves 7 are arranged at predetermined intervals in the horizontal direction Y in each of the front part A and the rear part C. The vertical groove 7 on the front part A side and the vertical groove 7 on the rear part C side are separated by a thick part 42 existing over the entire length of the absorbent core 40 in the horizontal direction Y.

In this embodiment, as shown in FIGS. 3, 4 and 5, the absorbent core 40 extends outward from the vertical groove 7 in the horizontal direction Y separately from the convex horizontal communication passage 60. A plurality of horizontal grooves 61 as horizontal communication passages 6 are arranged at predetermined intervals in the vertical direction X. The lateral grooves 61 are linear in a plan view, and a plurality of the lateral grooves 61 are arranged at predetermined intervals in the vertical direction X in each of the front part A and the rear part C. For this reason, by the cooperation of the vertical groove 7 and the horizontal groove 61, the malodor component and the excrement are diffused through the absorbent core 40 in both the vertical direction X and the horizontal direction Y, so that the trouble due to the malodor component is suppressed. Can be further increased.

Each of the vertical groove 7 and the horizontal groove 61, which is one of the horizontal communication passages 6, has an opening on the non-skin-facing surface of the absorbent core 40, and has a bottom on the side opposite to the opening, that is, a so-called “dent” or “dent”. 2, as shown in FIG. 2 and FIG. 3.

The vertical groove 7 and the horizontal groove 61 intersect each other, more specifically, are orthogonal to each other. Thereby, the non-skin-facing surface side of the standard absorption portion 41 of the absorbent core 40 is divided into a plurality of standard small absorption portions 41S by the vertical grooves 7 and the horizontal grooves 61 intersecting each other, as shown in FIGS. I have. On the non-skin-facing surface of the standard absorption portion 41, the vertical grooves 7 and the horizontal grooves 61 which are linear in a plan view and the standard small absorption portions 41S which are quadrangular in a plan view alternately exist in the vertical direction X and the horizontal direction Y, respectively. ing. As described above, the standard absorption section 41 in the present embodiment includes the standard small absorption section 41S having a relatively high basis weight and the vertical groove 7 and the horizontal groove 61 surrounding the standard small absorption section 41S and having a relatively low basis weight. And has a block structure having a number of block regions consisting of Due to the presence of the standard absorbent section 41 having such a block structure, the absorbent core 40 becomes flexible in both the vertical direction X and the horizontal direction Y, and as a result, the absorbent core 40 becomes It will be easy to follow the shape of.

In the napkin 1 of the present embodiment, as described above, the vertical groove 7 extends from the convex horizontal communication passage 60 to the longitudinal end of the absorbent core 40 on the non-skin-facing surface of the absorbent core 40. Since the groove 7 functions as a discharge path of the malodorous component similarly to the convex horizontal communication passage 60 or the space S in the vicinity thereof, the malodorous component derived from the excrement is discharged from both the vertical direction X and the horizontal direction Y. This makes it possible to effectively prevent inconvenience caused by the odor component remaining between the napkin 1 and the wearer's skin for a long time.

In addition, the rear part C is a part corresponding to the buttocks of the wearer when the napkin 1 is worn, and the standard absorbent part 41 of the absorbent core 40 located in the rear part C has the vertical groove 7 and the horizontal groove 61. Flexible and excellent body following. Therefore, the napkin 1 is excellent in the effect of preventing leakage particularly on the buttocks side, and effectively suppresses skin troubles such as rash of the wearer in combination with the antibacterial effect of the antibacterial agent disposed on the core wrap sheet 53. I can do it.

から From the viewpoint of improving excrement absorption performance and antibacterial performance, it is preferable that the width 60W of the convex horizontal communication passage 60 (see FIG. 4) is longer than the width 61W of the horizontal groove 61 (see FIG. 4). In this way, when the magnitude relation of width 60W> width 61W is established, the absorbent core 40 is easily bent in the vertical direction X particularly at the position where the protruding horizontal communication passage 60 is formed, so that the napkin 1 is worn. A thick portion 42 sandwiched between the pair of convex

lateral communication passages

60, 60 is formed by a bent curve (not shown) that traverses the pair of convex

lateral communication passages

60, 60 in the lateral direction Y. Is bent and deformed in the vertical direction X so as to protrude toward the wearer's skin side, and the excretion portion facing portion B fits tightly into the wearer's crotch portion, so that the excrement absorption performance can be improved. Further, when the napkin 1 is bent and deformed during wearing as described above, the core wrap sheet 53 containing the antibacterial agent in the deformed napkin 1 is bent, and the bent portion of the sheet 53 and the vicinity thereof are: Since the antibacterial agent is in a high concentration region where the amount of the antibacterial agent per unit area is larger than the other parts of the sheet 53, the antibacterial efficiency can be improved. Particularly, as in the present embodiment, the form in which the horizontal communication passage 6 (the convex horizontal communication passage 60) exists along the thick portion 42 (the step portion 43) is a napkin according to the above-described size relationship of width 60W> width 61W. 1 easily occurs, and the high concentration area of the antibacterial agent is easily formed in the rear portion C, in combination with the high body following ability of the rear portion C, and as a result, an excellent antibacterial action can be exhibited. The lateral groove 61 located around the stepped portion 43 also has a buffering function for suppressing excessive deformation in the horizontal communication passage 6 arranged along the stepped portion 43, so that the lateral groove 61 is provided around the stepped portion 43. Due to the presence of the lateral groove 61, the inconvenience that the lateral communication passage 6 arranged along the step 43 is collapsed while the napkin 1 is worn is suppressed. In particular, as shown in FIG. 4, the horizontal communication passage 6 arranged along the step portion 43 is a convex horizontal communication passage 60, and the horizontal groove 61 located around the convex horizontal communication passage 60 is in the horizontal direction. When formed along Y, this effect is easily exerted.

向上 It is preferable that such an effect of improving the excrement absorption performance and antibacterial performance due to the bending deformation of the napkin 1 is manifested particularly in the excretion part facing portion B where the excrement is concentrated. From this viewpoint, it is preferable that the horizontal communication passage 6 (60, 61), which can be a starting point of the bend, be disposed at the boundary between the excretion part facing part B and the front part A or the rear part C. In the present embodiment, as shown in FIG. 4, the convex-shaped horizontal communication passage 60 is disposed at the boundary between the excretion part facing part B and each of the front part A and the rear part C. The above-described effect is particularly easy to be exhibited, and the excrement of the thick portion 42 of the excretion portion facing portion B is directed outward in the horizontal direction Y through the convex horizontal communication passage 60 arranged along the thick portion 42. Therefore, the absorption performance of the absorbent core 40 can be effectively utilized.

From the viewpoint of more reliably achieving the above-described operation and effect, the ratio of the width 60W of the convex horizontal communication passage 60 and the width 61W of the horizontal groove 61 is preferably set to the former / the latter on the assumption that the former> the latter. Is 1.1 or more, more preferably 1.2 or more, and preferably 3.0 or less, more preferably 2.5 or less.
The width 60W of the convex horizontal communication passage 60 (that is, the length in the direction perpendicular to the extending direction of the convex horizontal communication passage 60) is preferably 2 mm or more, more preferably 3 mm or more, and preferably 10 mm or less. Preferably it is 8 mm or less.
The width 61W of the horizontal groove 61 (that is, the length in the direction orthogonal to the extending direction of the horizontal groove 61, the length in the vertical direction X) is preferably 1 mm or more, more preferably 2 mm or more, and preferably 5 mm or less, more preferably. Is 3 mm or less.

From the same viewpoint, the interval 7G between the

vertical grooves

7, 7 adjacent in the horizontal direction Y (see FIG. 4) is preferably 5 mm or more, more preferably 7 mm or more, and preferably 15 mm or less, more preferably 12 mm or less. It is. The distance 61G between the horizontal grooves 61 adjacent to each other in the vertical direction X (see FIG. 4) is preferably 10 mm or more, more preferably 15 mm or more, and preferably 30 mm or less, more preferably 25 mm or less.

From the same viewpoint, with respect to the absorbent core 40, the basis weight of the horizontal communication passage 6 (the basis weight of the portion overlapping the horizontal communication passage 6 in plan view) is smaller than the basis weight of the peripheral portion of the horizontal communication passage 6. Is preferably low. In this embodiment, the peripheral portion of the horizontal communication passage 6 is the standard small absorption portion 41S adjacent to the convex horizontal communication passage 60 or the horizontal groove 61. As described above, when the relation of the basis weight of the horizontal communication passage 6> the basis weight of the peripheral portion is established, the above-described bending deformation of the napkin 1 is apt to occur, and particularly, the thick portion 42 of the excretion portion facing portion B. Is more likely to protrude toward the wearer's skin. Moreover, since the horizontal connecting passage 6 having a relatively low basis weight can function as a temporary storage part for excrement, for example, when a large amount of excrement is excreted at one time when the napkin 1 is worn, The excrement can be diffused to the surrounding standard small absorbing portion 41S while storing the excrement in the communication passage 60, and the excrement absorbing performance can be further improved.

In the standard absorption section 41, the ratio between the basis weight of the horizontal communication passage 6 (60, 61) and the basis weight of the standard small absorption section 41S, which is a peripheral part thereof, is preferably as the former / the latter on the assumption that the former <the latter. Is 0.2 or more, more preferably 0.3 or more, and preferably 0.7 or less, more preferably 0.6 or less.
The basis weight of the horizontal communication passage 6 (60, 61) is preferably 50 g / m ² or more, more preferably 70 g / m ² or more, and preferably 200 g / m ² or less, more preferably 150 g / m ² or less. is there. The basis weight of the vertical groove 7 can be in the same range as that of the horizontal communication passage 6.
The basis weight of the standard small absorbing portion 41S is preferably 200 g / m ² or more, more preferably 220 g / m ² or more, and preferably 350 g / m ² or less, more preferably 300 g / m ² or less.
The grammage of the horizontal communication passage 6 (60, 61), the vertical groove 7, and the standard small absorbing portion 41S is measured by the following method.

<Measurement method of grammage>
A single blade made by Feather Co., Ltd. along the boundary between the portion (low basis weight portion) where the horizontal communication passage 6 is formed in the absorbent core 40 to be measured and the standard small absorbing portion 41S (high basis weight portion) which is a peripheral portion thereof. Cut with a razor. Ten small pieces of the high basis weight part obtained by cutting were measured using an electronic balance (Electronic balance GR-300 manufactured by A & D, accuracy: 4 digits after the decimal point), and one small piece of the high basis weight part was measured. Determine the average weight. The calculated average weight is divided by the average area per piece of the high basis weight portion to calculate the basis weight of the high basis weight portion, and the calculated basis weight is used as the basis weight of the standard small absorption portion 41S.
Next, along the boundary line extending in the lateral direction Y of the napkin 1 among the boundary lines between the low basis weight portion and the high basis weight portion, the length is 100 mm, and the width is adjusted to the design dimensions of the width of the low basis weight portion. Using a single-edged razor manufactured by Feather Co., Ltd., five small strips in the horizontal direction Y of the thin, low-basis weight portion are cut out. Each of the five obtained small pieces is measured using an electronic balance (an electronic balance GR-300 manufactured by A & D, precision: 4 digits after the decimal point), and the average weight of one small piece having a low basis weight is determined on average. The calculated average weight is divided by the average area per small piece in the lateral direction Y of the low basis weight part to calculate the basis weight in the lateral direction Y of the low basis weight part, and the horizontal connecting passage extending in the lateral direction Y The basis weight is 6. The grammage of the vertical groove 7 is calculated in the same manner as the horizontal communication passage 6.

As an example of a method of establishing the above-mentioned relation of “basis weight of the horizontal communication passage 6> basis weight of the peripheral portion (standard small absorption section 41S)” in the absorbent core 40 (standard absorption section 41), a stacking apparatus is used. In the known manufacturing method of the absorbent core used, there is a method in which the pile amount of the material forming the absorbent core differs between the horizontal communication passage 6 and the peripheral portion (standard small absorption portion 41S). A known method of manufacturing an absorbent core typically includes forming a material for forming the absorbent core, which is supplied through an air stream, on a bottom of a stacking concave portion formed on an outer surface of a stacking device (such as a rotating drum). In the case where the step of performing suction deposition is included, in such a step, the amount of the piled material of the forming material can be partially varied by using the accumulation concave portion having a partially different bottom opening ratio. Specifically, for example, the porosity of the bottom corresponding to the portion where the horizontal communication passage 6 (the convex-shaped horizontal communication passage 60, the horizontal groove 61) is to be formed is set to the portion where the peripheral portion (standard small absorption portion 41S) is to be formed. The lateral communication passage 6 is formed by using an accumulating recess in which the opening of the former is higher than that of the corresponding bottom, and the bottom of the former is adjusted so that the air flow can pass therethrough more easily than the bottom of the latter. It is possible to form the absorbent core 40 having the thinned and low basis weight portion and the surrounding thick and high basis weight portion (standard small absorbing portion 41S). In addition, in order to obtain the magnitude relationship of “basal weight of the horizontal communication passage 6> basic weight of the peripheral portion”, for example, a method of manufacturing an absorbent core described in JP-A-2015-97716 may be used. .

When the above-mentioned relation of “basis weight of horizontal communication passage 6> basis weight of peripheral portion (standard small absorbing portion 41S)” is satisfied, the absorbent core at the position of horizontal communication passage 6 (60, 61) is established. The density of 40 is the same as or lower than that of its peripheral portion (standard small absorption portion 41S). The present invention is not limited to the form in which the magnitude relation is established. For example, the density of the absorbent core 40 at the position where the horizontal communication passage 6 is arranged may be higher than that at the peripheral portion. The absorbent core 40 having such a magnitude relationship as “density of the arrangement position of the horizontal communication passage 6> density of the peripheral portion (standard small absorption portion 41S)” has, for example, a uniform basis weight and a surface (non-skin). The surface of the absorbent core having no irregularities on the opposing surface can be manufactured by subjecting the surface of the absorbent core to a pressing treatment such as embossing. The horizontal communication passage 6 has a higher density than the peripheral portion.

In the present embodiment, as shown in FIGS. 1 to 5, the topsheet 2 and the core wrap sheet 53 (more specifically, the skin side core wrap sheet 51) are integrally formed on the skin facing surface of the absorbent core 40. A fixing area 8 including the fixed fixing portion extends over the horizontal communication passage 6 (60, 61) and the non-arranged portion of the horizontal communication passage 6 located before and after in the vertical direction X thereof. In this embodiment, the non-arranged portions of the horizontal communication passage 6 are the standard small absorbing portion 41S and the thick portion 42.

The fixing area 8 in the present embodiment has a pair of vertical fixing

areas

81, 81 extending in the vertical direction X in the excretion part facing part B, and a front fixing extending in the horizontal direction Y in the front part A. A rear portion C has a rear fixed region 83 extending in the lateral direction Y in the rear portion C.

The fixing regions

81, 82, and 83 are connected to each other at their ends in the extending direction, and form a fixing region 8 having a ring shape (an oblong shape) in plan view. The pair of vertical fixing

regions

81, 81 have both sides in the horizontal direction Y of the thick portion 42 cut in the vertical direction X, and the central portion in the horizontal direction Y of the thick portion 42 is surrounded by the annular fixing region 8. Have been.

In the fixing region 8 (81, 82, 83), in addition to the above-mentioned fixing portion (that is, the portion formed by only the surface sheet 2 and the skin-side core wrap sheet 51 on the skin-facing surface of the absorbent core 40). And other parts (that is, non-fixed portions of the topsheet 2 and the skin-side core wrap sheet 51 on the skin-facing surface of the absorbent core 40) are included. In the fixed region 8 including both the fixed portion and the non-fixed portion, typically, a plurality of fixed portions are intermittently arranged (an interval between the fixed portions is preferably 3 mm or less). Is a fixed area 8 where a plurality of fixed parts are present in a certain unity. In the present invention, the shape and arrangement of the fixing region 8 in a plan view are not limited to the illustrated form, and can be set in the same manner as what is called a leak-proof groove or the like in this type of absorbent article. The shape in plan view may be a straight line or a shape including a curve.

前記 The fixing portion in the fixing region 8 (81, 82, 83) exists at least in the non-arranged portion of the horizontal communication passage 6 (60, 61), that is, the standard small absorption portion 41S and the thick portion 42. Means for fixing the topsheet 2, the skin-side core wrap sheet 51, and the absorbent core 40 to each other in the fixing portion is not particularly limited, and is a known method such as an adhesive, fusing with heat, ultrasonic sealing, or the like. Can be used.

In the present embodiment, the fixing portion in the fixing region 8 (81, 82, 83) is subjected to squeezing (so-called embossing) with or without heat from the skin-facing surface side of the absorbent main body 5. Is formed. Therefore, in the fixing portion, the topsheet 2 and the absorber 4 (the skin side core wrap sheet 51 and the absorbent core 40) are integrally recessed. That is, the fixing portion of the fixing region 8 in the present embodiment is a concave portion. The depth of the recess of the fixing portion may be constant over the entire length in the extending direction, or may be partially different.

In the present embodiment having the above-described configuration, the topsheet 2 and the absorbent core 40 are connected horizontally in the fixing region 8 (ie, the pair of vertical fixing regions 81, 81) located on both sides in the horizontal direction Y of the napkin 1. Since the skin side core wrap sheet 51 is fixed to the absorbent core 40 in a non-arranged portion of the passage 6 (60, 61), the napkin 1 is bent and deformed as described above (the thickness of the thick portion 42). In the event that the skin-side core wrap sheet 51 is deformed excessively due to the deformation, the skin-side core wrap sheet 51 is excessively deformed and wrinkles or the like are generated, leading to an uncomfortable feeling when worn. Can be prevented.

From the viewpoint that the effect of preventing the skin-side core wrap sheet 51 from excessively deforming is more reliably achieved, the topsheet 2 and the skin-side core wrap sheet 51 are arranged horizontally in the fixed region 8 (the vertical fixed region 81). It is preferable that the horizontal communication passage 6 is fixed to the absorbent core 40 not only in the non-arranged portion of the communication passage 6 (60, 61).

On the other hand, the topsheet 2 and the skin-side core wrap sheet 51 are fixed to the absorbent core 40 only at the non-arranged portions of the horizontal communication passages 6 (60, 61) in the fixing area 8 (the vertical fixing area 81), If the communication passage 6 is non-fixed, the relatively fixed portion and the relatively soft non-fixed portion are mixed in the vertical fixed region 81, so that the portion sandwiched between the pair of vertical fixed regions 81 (excretion) The touch at the central part in the lateral direction Y of the part opposing part B) can be good. In particular, the topsheet 2 and the skin-side core wrap sheet 51 are fixed to the absorbent core 40 before and after in the longitudinal direction X of the convex horizontal communication passage 60 in the fixing region 8 (vertical fixing region 81). If the napkin 1 is not fixed in the communication passage 60, the above-described bending deformation of the napkin 1 (projection deformation of the thick portion 42 toward the wearer's skin side) is promoted, so that the napkin 1 fits and absorbs excrement. Leads to the improvement of

In the napkin 1 of the present embodiment, the surface sheet 2, the skin-side core wrap sheet 51, and the absorbent core 40 in the fixing portion of the fixing region 8 (the vertical fixing region 81) are on their skin-facing surface side and non-skin side. It is in a state of being squeezed from both sides of the facing surface. Therefore, in the napkin 1 of the present embodiment, as shown in FIGS. 2 and 3, these

members

2, 51, and 2 are attached to the fixing portion of the fixing region 8 (vertical fixing region 81) on the skin-facing surface of the napkin 1. A skin-side recessed portion in which the skin-side recessed portion 40 is integrally formed is formed at a position overlapping the skin-side recessed portion in the thickness direction on the non-skin-facing surface (the surface facing the back sheet 3) of the absorbent core 40. The non-skin side concave portion 9 in which the non-skin side core wrap sheet 52 and the absorbent core 40 are integrally recessed is formed. The non-skin-side concave portion 9 has the same plan view shape as the skin-side concave portion as the fixing portion of the fixing region 8. The non-skin-side depression 9 is typically absorbed by pressing when the skin-side depression is formed by pressing such as embossing on the skin-facing surface of the napkin 1 according to an ordinary method. The non-skin-side recessed portion 9 formed on the non-skin-facing surface of the body 4 and thus formed almost completely coincides with the skin-side recessed portion in plan view of the absorber 4.

、 Inside the absorber 4 (absorbent core 40) in which the skin-side depression and the non-skin-side depression 9 are formed, there is a high-density portion sandwiched between these two depressions. The high-density portion has a line shape in plan view corresponding to the two concave portions in line shape in plan view. If such a high-density portion exists inside the absorbent core 40, the excrement moving outward in the lateral direction Y via the horizontal communication passage 6 (60, 61) of the absorbent core 40 will be discharged. The so-called lateral leakage in which the excrement leaks from outside in the lateral direction Y can be effectively prevented. In the high-density portion, the skin-side core wrap sheet 51 containing the antibacterial agent and the non-skin-side core wrap sheet 52 are close to each other in the thickness direction. The antimicrobial action can be efficiently exhibited with respect to a large amount of excrement in the absorbent core 40, centering on the high-density part, as compared with the site.

In the napkin 1 of the present embodiment, as described above, as shown in FIGS. Of the both end portions in the horizontal direction Y of the side leakage prevention sheets 13, an inner end portion 13 a relatively close to the horizontal center line CLy of the napkin 1 overlaps with the end portion in the horizontal direction Y of the absorber 4, Moreover, it is not fixed to the topsheet 2. As described above, the bending deformation of the napkin 1 (the deformation of the thick portion 42 protruding toward the wearer's skin side) can improve the fitting property of the napkin 1, the excrement absorption performance, the antibacterial action by the antibacterial agent, and the like. On the other hand, when the horizontal communication passage 6 (60, 61) is deformed so as to be crushed due to such deformation, a relatively high-viscosity excrement, such as menstrual blood, particularly from the excretion portion facing portion B (thick portion 42). However, as described above, when the inner end portion 13a of the side leakage prevention sheet 13 overlaps the end portion in the lateral direction Y of the absorber 4 and is not fixed to the topsheet 2 as described above. The inner end 13a of the side leakage prevention sheet 13 covers the open end in the extending direction of the horizontal communication passage 6 (60, 61) at the end of the absorber 4 in the horizontal direction Y. Such concerns are dispelled.

FIG. 6 shows another embodiment of the absorbent article of the present invention. In other embodiments described later, components different from the napkin 1 of the above embodiment will be mainly described, and similar components will be denoted by the same reference numerals and description thereof will be omitted. The description of the napkin 1 of the above-described embodiment is appropriately applied to the components that are not particularly described.

The napkin 1A shown in FIG. 6 extends outward in the lateral direction Y from each of the absorbent body 5 having a shape elongated in the longitudinal direction X and both sides along the longitudinal direction X of the excretion part facing portion B of the absorbent body 5. And a pair of rear flap portions 12 extending outward in the horizontal direction Y from both sides along the vertical direction X of the rear portion C of the absorbent main body 5. And a napkin preferably used for so-called night use. The night napkin is intended to be used at bedtime, and preferably has a total length of 30 cm or more. The rear flap portion 12 is extended to a side portion along the longitudinal direction X of the absorbent main body 5 when the side flap portion 10 largely projects outward in the lateral direction Y at the rear portion C. The rear flap portion 12 is formed on the non-skin-facing surface in a state in which the rear flap portion 12 is not folded back when it is fixed to the garment and the non-skin-facing surface is expanded, that is, extended to the side of the absorbent main body 5. The clothing is fixed to the skin-facing surface, that is, the inner surface of the clothing via the provided rear adhesive portion (not shown).

The napkin 1A is provided with a horizontal through-hole 62 having openings in both the skin-facing surface and the non-skin-facing surface of the absorbent core 40 as the horizontal communication passage 6 traversing the absorbent core 40 in the lateral direction Y. In this point, it is significantly different from the napkin 1 described above. The transverse through-hole 62 literally penetrates the absorbent core 40 in the thickness direction, and a portion where the material for forming the absorbent core 40 is not substantially present (the basis weight of the material for forming the absorbent core 40 is 30 g) / M ² or less). The horizontal through-hole 62 in the napkin 1A is disposed adjacent to the thick portion 42 similarly to the convex horizontal communication passage 60 disposed on the front side of the thick portion 42, and is located outside the vertical direction X in plan view. The V-shape is convex toward the center, and the top of the V-shape is located at the center in the lateral direction Y. The napkin 1A has the same effect as the napkin 1.

Hereinafter, the antibacterial agent contained in the core wrap sheet in the present invention will be described. It is preferable to use an organic antibacterial agent as the antibacterial agent. An organic antibacterial agent can be expected to have high antibacterial and deodorant properties due to its good affinity with the odor-causing substance when the odor-causing substance in the excrement is organic. From the viewpoint of affinity with organic odor-causing substances and bacteria, organic cationic antibacterial agents are particularly preferred. The cationic antibacterial agent can suppress generation of strong putrefaction odor as control of malodor generation. The “organic antibacterial agent” refers to an antibacterial agent containing a component mainly composed of an organic compound.

As the cationic antibacterial agent, those having the above-mentioned antibacterial action can be used without particular limitation. For example, there are those described in paragraphs [0015] to [0018] of the specification of JP-A-8-99841. One of these cationic antibacterial agents may be used alone, or two or more thereof may be used in combination. Cationic antibacterial agents are antibacterial agents based on organic compounds, and have a wider range of antibacterial action because they are more eluted into excretions such as urine than metal ion systems such as silver, zinc and copper. In particular, quaternary ammonium salts such as didecyldimethylammonium salt, alkylpyridinium salt, benzethonium salt, benzalkonium salt, monoalkyltrimethylammonium salt, dialkyldimethylammonium salt and the like, and at least one selected from the group consisting of these. Preferably, it contains a species. One of these cationic antibacterial agents may be used alone, or two or more thereof may be used in combination.

The content (basis weight) of the antibacterial agent in the core wrap sheet can be appropriately determined according to the type of the antibacterial agent and the like, but is preferably 0.03 g / m ² or more, and more preferably 0.05 g / m2. ² or more, and preferably 0.25 g / m ² or less, more preferably 0.20 g / m ² or less. The content (basis weight) of the antibacterial agent in the skin-side core wrap sheet 51 and the non-skin-side core wrap sheet 52 described above may be the same or different. When a cationic antimicrobial agent is used, its content basis weight can be measured by the following method. When a commercially available product or the like is subjected to analysis, each member is peeled off using a drier or a cold spray to obtain a core wrap sheet to be measured. Then, the content basis weight of the cationic antibacterial agent in the core wrap sheet is measured by a liquid chromatograph / mass spectrometer (6140 LC / MS, manufactured by Agilent Technologies, Inc., ionization method: ESI). Alternatively, the content of the cationic antibacterial agent can be measured based on a calibration curve prepared by a calibration curve method.

From the viewpoint of achieving both antibacterial properties and safety (low irritation to skin), it is preferable to use a benzalkonium salt represented by the following formula (1) among cationic antibacterial agents.

In the formula (1), R ¹ and R ² represent the same or different methyl groups, ethyl groups, or linear or branched alkyl or alkenyl groups having 8 to 20 carbon atoms. X ^- represents a monovalent anion.

One of the benzalkonium salts represented by the formula (1) can be used alone or in combination of two or more. In the formula (1), preferred combinations of R ¹ and R ² include, for example, a combination in which R ¹ is a methyl group and R ² is a linear or branched alkyl group having 8 to 20 carbon atoms, Combinations in which ¹ and R ² are the same group, and the group is a linear or branched alkyl group having 8 to 20 carbon atoms. In these combinations, the carbon number of the alkyl group is more preferably 10 or more and 18 or less.

In the above formula (1), X ^- a monovalent anion represented by is preferably, for example, halide ions or anions active group. “Anionic active group” refers to an ion having anionic surface activity.

Examples of the anionic active group include an anionic active group having 6 or more carbon atoms, particularly 10 or more carbon atoms, and containing a linear or branched alkyl or alkenyl group having 20 or less carbon atoms, particularly 18 or less carbon atoms. Preferably, it is used. It is preferable to use, for example, an alkyl phosphate salt, an alkyl carboxylate salt, an alkyl sulfonate salt, or an alkyl sulfate salt as such an anion active group from the viewpoint of enhancing antibacterial performance. In particular, the use of an alkyl phosphoric acid represented by the following formula (2) is preferable because the antibacterial performance is further enhanced.

In the formula (2), one of R ³ and R ⁴ represents a linear or branched alkyl or alkenyl group having 6 to 20 carbon atoms, and the other represents a hydrogen atom, a methyl group or an ethyl group.

Preferred combinations of R ³ and R ⁴ include those in which R ³ is a hydrogen atom and R ⁴ is a linear or branched alkyl group having 8 to 20 carbon atoms. More preferably, the alkyl group has 10 to 18 carbon atoms. By including a benzalkonium salt having an anion active group represented by the formula (2) in a core wrap sheet, in addition to improving antibacterial and deodorizing performance, the texture (bulkiness, flexibility) of the core wrap sheet Can be improved.

中でも Among the above-mentioned benzalkonium salts, it is particularly preferable to use benzalkonium cetyl phosphate as an antibacterial agent from the viewpoint of high antibacterial properties, safety and immediate effect. Benzalkonium cetyl phosphate is an organic cationic antibacterial agent that has a good balance between antibacterial properties and low skin irritation (low water solubility) and is relatively safe. As a core wrap sheet.

多孔 In the present invention, the other antibacterial agent contained in the core wrap sheet includes porous particles. The porous particle in the present invention refers to a particle having a large number of pores at least on the surface of the particle and capable of collecting, adsorbing, and / or including a volatile odor component in the pores. The porous particles may be used alone as an antibacterial agent, or may be used in combination with the above-mentioned cationic antibacterial agent.

材質 Examples of the material of the porous particles include an organic compound, an inorganic compound, a polymer thereof, and a combination thereof. Specific examples thereof include the synthesis of acrylic polymers such as porous methacrylic acid polymers and porous acrylic acid polymers, aromatic polymers such as porous divinylbenzene polymers and porous pyridine copolymers, and their copolymers and the like. Porous polymers; natural porous polymers such as chitin and chitosan; zinc oxide, activated carbon, silica, silicon dioxide (silica gel), calcium silicate, aluminosilicate compounds, high silica zeolite (hydrophobic zeolite), sepiolite, cancrinite Inorganic porous materials such as zeolites, zeolites, and hydrated zirconium oxide; silver such as silver-supported zeolites, silver-supported cancrinite, and silver-supported porous styrene-divinylbenzene-vinylpyridine polymers and silver-supported porous divinylbenzene-vinylpyridine polymers Pyridine Coalescence, include a metal-supported porous such, it preferably contains at least one selected from the group consisting of.

中でも Among these, it is preferable to contain at least one selected from the group consisting of activated carbon, aluminosilicate compounds and vinylpyridine copolymers from the viewpoint of improving antibacterial and deodorant performance. One of these porous particles may be used alone, or two or more thereof may be used in combination. In particular, the use of organic porous particles and inorganic porous particles in combination is more effective in that various odor components can be collected at once. Examples of the above-mentioned porous vinylpyridine copolymer include a porous styrene-divinylbenzene-vinylpyridine polymer and a porous divinylbenzene-vinylpyridine polymer. The silver-carrying cancrinite is a cancrinite-like mineral described in paragraphs [0029] to [0045] of JP-A-2005-336363. Further, “organic porous particles” refers to particles having porosity mainly composed of an organic compound, and “inorganic porous particles” refer to particles having porosity mainly composed of an inorganic compound. It means that.

From the viewpoint of more effectively exhibiting antibacterial and deodorant performance, the porous particles used in the present invention preferably have a BET specific surface area of 50 m ² / g or more, and more preferably 100 m ² / g or more. More preferably, it is still more preferably 200 m ² / g or more. Although the upper limit of the BET specific surface area is not particularly limited, it is practical to be 2000 m ² / g or less. The larger the value of the BET specific surface area of the porous particles, the higher the deodorizing performance. Therefore, the larger the value of the BET specific surface area is within the above range, the more preferable. The BET specific surface area can be measured by a multipoint method using liquid nitrogen using a specific surface area / pore distribution measuring device “ASAP2020” manufactured by Shimadzu Corporation, and a value can be derived in a range where the parameter C is positive. . Further, the pore distribution can be measured by a mercury intrusion method.

From the same viewpoint, the porous particles used in the present invention may have at least an average pore diameter of 0.1 nm or more, preferably 2 nm or more, and more preferably 50 nm or less. More preferably, it is even more preferably 30 nm or less. The pore diameter of the porous particles can be measured using a specific surface area / pore distribution measuring device “ASAP2020” manufactured by Shimadzu Corporation.

形状 The shape of the porous particles is not particularly limited as long as the deodorizing effect is exerted, and may be any one of a spherical shape, a rod shape having a predetermined aspect ratio, a needle shape, a pulverized shape and the like. The shape of the fine particles can be determined by observing using a scanning electron microscope “JCM-5100” manufactured by JEOL Ltd.

Specific examples of the porous particles, the activated carbon described above, when using the aluminosilicate compound and vinyl pyridine copolymer, respectively its BET specific surface area, 1750m ² / g approximately, 250 meters ² / g approximately, 350 meters ² / g and an average pore diameter of about 4.5 nm, about 20 nm, and about 10 nm, respectively.

臭 The odor components derived from excretions such as urine and menstrual blood, which are subject to antibacterial and deodorant, are a mixture of a plurality of components such as ammonia, amines, fatty acids, hydrogen sulfide and mercaptans. Generally, since the molecular size of these odor components is 1 nm or more, it is possible to effectively adsorb a plurality of odor components by using porous particles having an average pore size of 2 nm or more as a deodorant. it can.

In particular, when the porous particles satisfying one of the preferable numerical ranges of the BET specific surface area and the average pore diameter described above are used, the content of the porous particles can be reduced while maintaining high antibacterial and deodorizing performance. Is preferred. Furthermore, when the porous particles satisfying both the preferred numerical ranges of the BET specific surface area and the average pore diameter are used, the antibacterial and deodorizing performance is further improved, and the content of the porous particles can be further reduced. Is more preferable. This, combined with the reduction of the content of the porous particles by the combination with the cationic antibacterial agent described above, provides a sustained and effective antibacterial action and deodorant action, and improves the texture of the core wrap sheet. In addition, it is possible to improve the feeling of wearing when incorporated into an absorbent article.

The content of the porous particles (antimicrobials) in the core wrap sheet (basis weight), from the viewpoint of obtaining suitably antibacterial and deodorant effect, 0.05 g / ^{m 2} or more preferably, 0.1 g / ^{m 2} or more More preferably, it is more preferably 0.5 g / m ² or more. The upper limit is preferably 5 g / m ² or less, more preferably 3 g / m ² or less, and still more preferably 1.0 g / m ² or less, from the viewpoint of suppressing a reduction in the texture of the core wrap sheet.

When using activated carbon, an aluminosilicate compound and a vinylpyridine copolymer, which are specific examples of the porous particles described above, a further deodorizing function can be added by performing surface treatment. For example, activated carbon can have a deodorizing function by chemical adsorption to a sulfur-based gas by activating zinc chloride (ZnCl). Further, the aluminosilicate compound can be provided with an antibacterial effect by supporting zinc, and the vinylpyridine copolymer can be provided with an antibacterial effect by supporting silver.

As described above, the present invention has been described based on the preferred embodiments. However, the absorbent article of the present invention is not limited to the above embodiments, and can be appropriately changed.
For example, in the above-described embodiment, the thick portion 42 protrudes toward the back sheet 3, but may instead protrude toward the top sheet 2.
In addition, from the viewpoint of improvement in absorbency and leakproofness, between the topsheet 2 and the absorber 4 (skin-side core wrap sheet 51), paper or various nonwoven fabrics, also called second sheets, sublayer sheets, etc., are used. Liquid permeable sheet may be interposed.
The absorbent article of the present invention may be, for example, a panty liner (a vaginal sheet) in addition to the sanitary napkin as shown.
All the parts of only one embodiment described above can be mutually used as appropriate.

1 sanitary napkins (absorbent articles)
2 Top sheet 3 Back sheet 4 Absorber 40 Absorbent core 41 Standard absorbing section 41S Standard small absorbing section 42 Thick section 43 Step section 51 Skin side core wrap sheet 52 Non-skin side core wrap sheet 53 Core wrap sheet S Space 5 Absorption Main body 6 Horizontal communication path 60 Convex-shaped horizontal communication path 61 Horizontal groove 62 Horizontal through-opening 7 Vertical groove 8 Fixed area (skin-side recessed part)
81 Vertical fixed area 82 Front horizontal fixed area 83 Rear horizontal fixed area 9 Non-skin side concave part (fixed part)
13 Side leakproof sheet 13a Inner end (free end) of side leakproof sheet
13b Outer end A of the side leak-proof sheet Front part B Excretion part facing part C Rear part

Claims

An excretory part-facing part including an excretion spot part that has a longitudinal direction corresponding to the front-rear direction of the wearer and a lateral direction perpendicular thereto, and includes an excretion spot part disposed to face the excretory part of the wearer in the longitudinal direction; A front part arranged on the wearer's abdomen rather than the facing part and a rear part arranged on the wearer's back rather than the excretion part facing part, and a topsheet forming a skin facing surface, A backsheet that forms a non-skin-facing surface, and an absorbent article including an absorber positioned between these two sheets,
The absorbent body includes a liquid-retentive absorbent core, and a core wrap sheet that covers the skin-facing surface and the non-skin-facing surface of the absorbent core, and the core wrap sheet contains an antibacterial agent. And
The absorbent core has a lateral communication passage extending in the lateral direction with an opening in at least one of the skin-facing surface and the non-skin-facing surface of the absorbent core. Absorbent article that is continuously disposed over the entire surface.
The absorbent core has a standard absorption portion and a thick portion having a thickness greater than the standard absorption portion, and the horizontal communication passage is arranged adjacent to the thick portion,
2. The absorbent article according to claim 1, wherein a space exists between the absorbent core and the core wrap sheet in a step portion caused by a thickness difference between the standard absorbent portion and the thick portion.
The absorbent article according to claim 2, wherein the thick portion extends over the entire length of the absorbent core in the lateral direction.
4. The horizontal communication passage according to any one of claims 1 to 3, wherein at least a part of the horizontal communication passage provided in the absorbent core is a horizontal communication passage having a convex shape outward in a vertical direction in plan view. Absorbent articles.
5. The absorbent core is provided with a vertical groove extending in the vertical direction outward from the convex horizontal communication passage from the convex horizontal communication passage to a vertical end of the absorbent core. 3. The absorbent article according to claim 1.
In the absorbent core, apart from the convex horizontal communication passage, a plurality of horizontal grooves as the horizontal communication passage extending laterally outward from the vertical groove are arranged at predetermined intervals in the vertical direction. The absorbent article according to claim 5, wherein
7. The absorbent article according to claim 6, wherein the width of the convex horizontal communication passage is longer than the width of the horizontal groove.
(8) The absorbent article according to any one of (1) to (7), wherein the horizontal communication passage is arranged at a boundary between the excretion part facing part and the front part or the rear part.
The absorbent article according to claim 8, wherein the lateral communication passage is disposed at a boundary between the excretion portion facing portion and each of the front portion and the rear portion.
The absorbent article according to any one of claims 1 to 9, wherein, with respect to the absorbent core, a basis weight of the horizontal communication passage is lower than a basis weight of a peripheral portion of the horizontal communication passage.
The absorbent article according to claim 10, wherein the lateral communication passage has openings on both the skin-facing surface and the non-skin-facing surface of the absorbent core.
The absorbent according to any one of claims 1 to 9, wherein a density of the absorbent core at a position where the horizontal communication passage is arranged is higher than a density of the absorbent core at a peripheral portion of the horizontal communication passage. Goods.
A fixing region including a fixing portion in which the topsheet and the core wrap sheet are integrally fixed to the skin-facing surface of the absorbent core, wherein the horizontal communication passage and the horizontal communication passage are located in front and rear of the horizontal communication passage. Extends over the non-arranged portion of
13. The fixing section according to claim 1, wherein in the fixing region, the topsheet and the core wrap sheet are fixed to the absorbent core at a non-arranged portion of the horizontal communication passage to form the fixing portion. 3. The absorbent article according to claim 1.
The absorbent article according to claim 13, wherein, in the fixing region, the topsheet and the core wrap sheet are fixed to the absorbent core in the horizontal communication passage to form the fixing portion.
The absorption according to claim 13 or 14, wherein, in the fixing portion, the topsheet, the core wrap sheet, and the absorbent core are squeezed from both the skin-facing surface side and the non-skin-facing surface side. Products.
The said fixing | fixed area | region, the said surface sheet and the said core wrap sheet are being fixed to the said absorbent core only in the non-arrangement part of the said horizontal communication path, and are not fixed in this horizontal communication path. Absorbent articles.
A pair of side leakage-preventing sheets are disposed on the skin-facing surface side of each of both lateral end portions of the topsheet, and the side leakage-preventing sheet divides the absorbent article into two in the lateral direction. Has an inner end relatively closer to the outer end, and an outer end relatively far from the lateral centerline,
The absorbent article according to any one of claims 1 to 16, wherein an inner end of the side leak-proof sheet overlaps a lateral end of the absorber and is not fixed to the topsheet.
The absorbent article according to any one of claims 1 to 17, which is a sanitary napkin.