JP6505339B1 - Absorbent articles - Google Patents

Abstract

An object of the present invention is to provide an absorbent article that is excellent in antibacterial performance and can be used without concern for odors derived from excrement. The absorbent body (4) in the absorbent article (1) comprises a liquid-retaining absorbent core (40) and a skin-side core wrap sheet (51) covering the skin-facing surface of the absorbent core (40). And a non-skin side core wrap sheet (52) covering the non-skin facing surface of the absorbent core (40). The antibacterial agent is disposed on the skin side core wrap sheet (51) and the non-skin side core wrap sheet (52). The antimicrobial agent comprises an organic antimicrobial agent that can move from each of the core wrap sheets (51, 52) to the absorbent core (40) in contact with water. The non-skin facing surface of the absorbent core (40) has a recess (6) and a protrusion (7), and the non-skin side core wrap sheet (52) does not follow the recess (6) and is a protrusion It is in contact with the top of part (7).

Description

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

  In absorbent articles such as sanitary napkins, when the fit to the skin of the wearer is insufficient and there is a gap with the skin, excrement such as menstrual blood flows along the surface of the skin and flows to the buttocks, 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 in a portion opposed to the excretory portion such as the vaginal opening of the wearer to form the skin facing surface There are known techniques for enhancing the fit of the absorbent article to the body and preventing leakage by raising the There is also known a block-shaped absorbent core provided with a groove-shaped space extending in a planar direction (Patent Documents 1 and 2).

  In the case of absorbent articles, the offensive odor derived from excrement during wearing is an anxious problem for the wearer and the surrounding people. In order to solve this problem, conventionally, deodorants and antibacterial agents have been blended in absorbent articles. For example, in Patent Document 3, a core wrap sheet for covering an absorbent core contains a cationic antibacterial agent and a pH buffer deodorant, and these agents are persistently eluted in the excretory passage of excrement. Techniques have been described that are intended to develop a deodorizing effect. Further, in Patent Document 4, a central height in which a high basis weight portion and a low basis weight portion are alternately formed in the longitudinal direction or in the lateral direction in the lateral center of the absorbent core in the excretory part facing portion of the absorbent article. It is described to provide a ventilated area and to arrange a deodorant sheet containing a deodorant such as activated carbon between the absorbent core and the back sheet in the central highly ventilated area. According to the absorbent article described in Patent Document 4, since the odorous component contained in the perennial blood circulates in the absorbent core with improved air permeability and is efficiently adsorbed by the deodorant sheet, It is said that not only the smell of a large amount of time but also excellent deodorizing performance can be obtained even when used at a time of low menstrual blood volume.

JP, 2015-97716, A JP, 2016-119982, A JP, 2016-169446, A JP, 2016-120192, A

  As described in Patent Documents 3 and 4, a fiber sheet blended with an inorganic substance such as an antimicrobial agent generally has a configuration in which the inorganic substance is supported in the inter-fiber space, and thus, such a mineral is not usually blended. In comparison with the fiber sheet of the above, the inter-fiber gap is small and hence the liquid permeability is inferior. Therefore, when a fibrous sheet containing an antimicrobial agent is used as a member for covering the outer surface of an absorbent core in an absorbent article, such as a core wrap sheet, excretion is caused due to the poor flow of the fibrous sheet. The substance remains without passing through the fiber sheet, and bacteria may propagate in the accumulated excrement, which may be a source of unpleasant odor, and the antibacterial agent contained in the fiber sheet is Since there is little movement of the fiber sheet into the interior of the absorbent core together with the excrement moving in the thickness direction, there is room for improvement in terms of the antibacterial action on the inside of the absorbent core.

  Therefore, an object of the present invention is to provide an absorbent article which can eliminate the drawbacks of the above-mentioned prior art, and specifically, it is excellent in antibacterial performance and used without worrying about odor derived from excrement The present invention relates to providing an absorbent article that can be

  The present invention has a discharge portion facing portion including a discharge spot portion which has a longitudinal direction corresponding to the front-rear direction of the wearer and a horizontal direction orthogonal thereto, and is disposed to face the discharge portion of the wearer in the vertical direction The skin opposing surface is formed by being divided into a front portion disposed on the ventral side of the wearer than the excretory portion facing portion and a rear portion disposed on the back side of the wearer than the excrement portion facing portion. An absorbent article comprising a top sheet, a back sheet forming a non-skin facing surface, and an absorber positioned between the two sheets, the absorber comprising a liquid-retaining absorbent core, A skin-side core wrap sheet for covering the skin-facing surface of the absorbent core, and a non-skin-side core wrap sheet for covering the non-skin-facing surface of the absorbent core. The skin-side core wrap sheet comes in contact with water and absorbs the water from the core wrap sheet The non-skin-side core wrap sheet includes an organic antibacterial agent that can move to the core, the non-skin facing surface of the absorbent core has a recess and a protrusion, and the non-skin side core wrap sheet does not follow the recess. It is an absorbent article in contact with the top of the convex portion.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which can be used without being concerned about the smell derived from the excretion is provided.

FIG. 1 is a perspective view showing the skin-facing surface side (surface sheet side) of a sanitary napkin which is an embodiment of the absorbent article of the present invention. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line I-I of FIG. 1 (a cross section at a portion where the lateral recess is not formed). FIG. 3 is a cross-sectional view schematically showing a cross section taken along line II-II in FIG. 1 (a cross section at the formation portion of the lateral recess). FIG. 4 is a perspective view showing the non-skin facing surface side of the absorbent core of the sanitary napkin of FIG.

  Hereinafter, the absorbent article of the present invention will be described based on its preferred embodiments with reference to the drawings. The sanitary napkin 1 which is one Embodiment of the absorbent article of this invention is shown by FIGS. 1-3. 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-retaining absorbent 4 positioned between the two sheets 2 and 3.

  In the present specification, the “skin-facing surface” is a surface of an absorbent article or a component thereof (eg, absorbent body 4) that is directed to the skin side of the wearer when the absorbent article is worn, ie, relative to the wearer. It is a side close to the skin, and the "non-skin facing surface" is the side opposite to the skin side when wearing the absorbent article or its constituent members, ie, the side relatively away from the wearer's skin It is a face to be In addition, "at the time of wear" here means the state in which the normal proper wearing position, ie, the correct wearing position of the said absorbent article, was maintained.

  As shown in FIG. 1, the napkin 1 has a longitudinal direction X corresponding to the longitudinal direction of the wearer and extending from the ventral side of the wearer to the dorsal side via the crotch, and a lateral direction Y orthogonal thereto. Also, in the longitudinal direction X, the excretory part opposing part B including the excretory spot part (not shown) facing the excretory part such as the vaginal opening of the wearer, and the ventral side of the wearer than the excretory part opposing part B It is divided into three, a front part A disposed on the (front side) and a rear part C 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 described, the longitudinal direction X is a direction along the longitudinal direction X of the absorbent article or the longitudinal direction X of the absorbent article in its constituent members, and the transverse direction Y is the transverse direction of the absorbent article It is a direction along the lateral direction Y of the absorbent article in the direction Y or its constituent members.

  The napkin 1 is, as shown in FIG. 1, an absorbent main body 5 having a shape long in the longitudinal direction X, and an outer side in the lateral direction Y from both side portions along the longitudinal direction X of the excretory part opposing part B in the absorbent main body 5 And a pair of rear flaps 12, 12 extending outward in the lateral direction Y from both sides along the longitudinal direction X of the rear portion C in the absorbent main body 5, respectively. It is a napkin which is preferably used for so-called night use. The night napkin is assumed to be used at bedtime, and preferably has a total length of 30 cm or more. The absorbent main body 5 is a main part of the napkin 1 and includes the front sheet 2, the back sheet 3, and the absorber 4, and the front portion A, the discharge portion facing portion B and the rear portion C in the longitudinal direction X Divided into three.

  When the absorbent article has a wing as in the case of the napkin 1 shown in FIG. 1, the excretion part facing part in the absorbent article of the present invention is the longitudinal direction of the absorbent article (longitudinal direction, in the figure). In the X direction), which means a region having a wing, and taking the napkin 1 as an example, it is sandwiched between a root along the longitudinal direction X of one wing 11 and a root along the longitudinal direction X of the other wing 11. Area. In addition, although not illustrated, the excretory part facing part in the absorbent article not having a wing part is an area at the center in the longitudinal direction when the absorbent article is longitudinally divided into three equal parts and divided into three areas. is there.

  As shown in FIGS. 1 to 3, the top sheet 2 covers the entire area of the skin facing surface of the absorber 4. On the other hand, the back sheet 3 covers the entire non-skin facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4 The side flap portion 10 is formed together with 13. The side flap portion 10 is a portion formed of a member extending outward in the lateral direction Y from the absorber 4. The back sheet 3 and the side leakproof sheet 13 are joined to each other by a known joining means such as an adhesive, a heat seal, an ultrasonic seal or the like at the extension from the side edges along the longitudinal direction X of the absorber 4 There is. Thus, in the napkin 1, the absorber 4 is sandwiched between the top sheet 2 and the back sheet 3, and the top sheet 2 or the side leakproof sheet 13 and the back sheet 3 are joined along the entire outer edge of the napkin 1. There is. 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. 1, the side flaps 10 largely project outward in the lateral direction Y at the excretory part facing part B, and thereby the pair of left and right sides along the longitudinal direction X of the absorbent main body 5 are paired. Wing portions 11, 11 are extended. On the non-skin facing surface of the wing portion 11, as shown in FIGS. 2 and 3, a wing portion adhesive portion 11A for fixing the wing portion 11 to clothes such as shorts is provided. The wing portion 11 is used by being folded back to the non-skin facing surface (outer surface) side of the crotch portion of the clothes such as shorts. Further, the side flaps 10 project largely toward the outside in the lateral direction Y at the rear portion C, whereby the pair of rear flaps 12 and 12 are provided on the left and right sides along the longitudinal direction X of the absorbent main body 5. Are extended. The rear flap portion 12 is not folded back when it is fixed to the clothes, and is formed on the non-skin opposing surface in a state in which the non-skin opposing surface is spread, that is, to the side of the absorbent main body 5 It is fixed to the skin opposing surface or the inner surface of the clothes via the rear adhesive part (not shown). The wing adhesive part and the rear adhesive part are covered with a release sheet (not shown) made of film, nonwoven fabric, paper or the like before use.

  As shown in FIGS. 1 to 3, on the skin opposing surface of the absorbent main body 5, that is, on both sides along the longitudinal direction X in the skin opposing surface of the surface sheet 2, right and left along the longitudinal direction X of the absorber 4 in plan view Side leak-proof sheets 13 are disposed over substantially the entire length in the longitudinal direction X of the absorbent main body 5 so as to overlap the side portions. Each of the pair of side leak-barrier sheets 13 and 13 is joined to the top sheet 2 by a known joining means such as an adhesive or the like at a joining line 14 extending in the longitudinal direction X. The inwardly located inner edge is the free end. An elastic member 15 for forming a leakproof cuff is extended in the longitudinal direction X at the free end of the side leakproof sheet 13 (inside of the folded back sheet 13), whereby the napkin 1 is worn Sometimes, the free end of the sheet 13 is erected toward the wearer's skin side by the contraction force of the elastic member 15 to form a leak-barrier cuff, which is excreted on the skin-facing surface of the napkin 1 Side leakage of excreted menstrual blood and the like is effectively prevented.

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

  The absorbent body 4 has a liquid-retaining 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. And a wrap sheet 52. In the present embodiment, the absorbent core 40 and the napkin 1 are formed symmetrically with respect to a transverse center line (not shown) that bisects the absorbent main body 5 in the transverse direction Y. The absorbent core 40 in the napkin 1 is composed of a fiber assembly made of a fiber material such as pulp fibers, or a fiber assembly holding a water absorbing polymer. The core wrap sheets 51 and 52 play a role of preventing leakage of the material of the absorbent core 40 and improving the shape retention of the absorbent core 40. Between the surface sheet 2 and the skin side core wrap sheet 51, and between the back surface sheet 3 and the non-skin side core wrap sheet 52, they are joined to each other by a pattern coated adhesive such as dots, spirals, stripes, etc. 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 wide core wrap sheet 53, and the sheet 53 is shown in FIGS. 2 and 3. Thus, the surface (outer surface) of the absorbent core 40 is coated so that the overlapping portion 54 of the both ends in the lateral direction Y is located on the non-skin facing surface of the absorbent core 40 (absorbent body 4). There is. The overlapping portion 54 is located at the central portion of the absorber 4 in the lateral direction Y.

More specifically, the wide core wrap sheet 53 has a width that is twice or more and three times or less the length of the width Y of the absorbent core 40, and is a fiber with a relatively long length (width) in the width Y It is a sheet and covers the entire 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 absorbent It is rolled down below the core 40 to cover the entire non-skin facing surface of the absorbent core 40. And in this one wide core wrap sheet 53, the part covering the skin facing surface of the absorbent core 40 is the skin side core wrap sheet 51, and the part covering the non-skin facing surface of the absorbent core 40 is the non-skin side It is the core wrap sheet 52, and 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 wide core wrap sheet 53 (core wrap sheets 51, 52) 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. m ² or less.

  The core wrap sheets 51 and 52 are typically sheet materials such as non-woven fabric mainly made of hydrophilic fibers and paper. The hydrophilic fibers contained in the core wrap sheets 51 and 52 are wood pulp such as softwood pulp and hardwood pulp, natural fibers such as non-wood pulp such as cotton pulp and hemp pulp; modification such as cationized pulp and mercerized pulp 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; hydrophilized synthetic fibers such as polyethylene terephthalate fiber, polyethylene fiber, polypropylene fiber and polyester fiber The fiber etc. which gave the process are mentioned, These 1 type can be used individually or in mixture of 2 or more types. Typical of hydrophilic fibers in the core wrap sheets 51 and 52 are natural fibers, regenerated cellulose fibers or semi-synthetic fibers. The core wrap sheets 51, 52 may further include synthetic fibers (hydrophobic fibers), such as thermoplastic fibers, in addition to hydrophilic fibers. The thermoplastic fiber is, for example, a single fiber formed using a single synthetic resin such as polyethylene, polypropylene, polyester, polyurethane, or a synthetic resin such as a composite of two or more of these. Composite fibers, for example, core-sheath type or side-by-side type composite fibers formed using two or more types of synthetic resins can also be used.

  Each of the skin side core wrap sheet 51 and the non-skin side core wrap sheet 52 is provided with an antibacterial agent. In the napkin 1, as described above, the skin side core wrap sheet 51 is a part of one wide core wrap sheet 53 together with the non-skin side core wrap sheet 52, and the antibacterial agent is disposed on the entire sheet 53. There is.

  As one of the main features of the napkin 1, the antimicrobial agent disposed on both core wrap sheets 51 and 52 has a thickness corresponding to the thickness of the sheets 51 and 52 (placement portion of the antimicrobial agent) on which the antimicrobial agent is disposed. When it comes in contact with water moving in a direction, it includes an organic antibacterial agent which can move from the sheets 51, 52 in the thickness direction. That is, each of the core wrap sheets 51 and 52 contains an organic antibacterial agent having water mobility. Hereinafter, in the present specification, an organic antibacterial agent having water mobility is also referred to as a "first antibacterial agent".

  When the first antibacterial agent is present in the skin-side core wrap sheet 51, the organic agent such as menstrual blood moves the sheet 51 in the thickness direction when the napkin 1 is used. In combination with the affinity to the organic matter contained in the excrement, the protein is rapidly moved from the sheet 51 by dissolving or dispersing in the excrement, and reaches the absorbent core 40 with the excrement. As a result, the growth of bacteria in the waste absorbed and held in the absorbent core 40 can be suppressed, and thus the generation of unpleasant odor can be suppressed.

  In addition, the first antimicrobial agent is also disposed in the non-skin side core wrap sheet 52, whereby the excrement that has passed through the top sheet 2, the skin side core wrap sheet 51, and the absorbent core 40 and reached the sheet 52. Then, the first antibacterial agent in the sheet 52 is dissolved or dispersed, and the excrement containing the antibacterial agent is generated on the non-skin facing surface side of the absorbent core 40. Then, the excrement including the first antibacterial agent which has passed through the skin side core wrap sheet 51 and reached the non-skin side core wrap sheet 52 further contains the first antibacterial agent in the sheet 52. As a result, an excrement with a high concentration of the first antimicrobial agent will be present on the non-skin-facing side of the absorbent core 40, thereby suppressing the growth of bacteria inside the napkin 1 and suppressing the generation of unpleasant odors. Will lead to

  The core wrap sheets 51 and 52 may further contain, in addition to the first antibacterial agent, another antibacterial agent in a state of being less likely to move by contact with water than the first antibacterial agent. Hereinafter, in the present specification, this other antibacterial agent, that is, the water mobility (the property of easily moving with water) is low in comparison with the first antibacterial agent, in other words, the water mobility (it is difficult to move with water) Antibacterial agents having properties) are also referred to as "second antibacterial agents".

  As described above, the first antimicrobial agent is mainly expected to exhibit the antimicrobial effect inside the absorbent core 40. The second antibacterial agent remains mainly in the skin side core wrap sheet 51 or the non-skin side core wrap sheet 52 which is the initial placement portion even if body fluid such as menstrual blood and the like is repeatedly excreted. It stays in 52 and can exert an antibacterial effect. Therefore, by arranging these two types of antibacterial agents in the core wrap sheets 51, 52, the proliferation of bacteria inside the napkin 1 and the generation of unpleasant odor are more effectively suppressed.

The factor for determining whether the antibacterial agent contained in the skin side core wrap sheet 51 has water mobility, that is, whether it is the first or second antibacterial agent is not limited, For example, the following (1) to (5) may be mentioned. The water mobility of such an antimicrobial agent is largely influenced by a combination of one or more of the following factors (1) to (5).
(1) Whether the antibacterial agent is firmly fixed to the skin side core wrap sheet 51 or not.
(2) Whether the antibacterial agent is present on the surface of the fibers constituting the skin side core wrap sheet 51 or is present inside the fibers.
(3) Relative magnitude relationship between the affinity between the antimicrobial agent and the skin side core wrap sheet 51 and the affinity between the antimicrobial agent and water (4) Whether the antimicrobial agent is water soluble or poorly water soluble or insoluble Is it?
(5) Whether the skin-side core wrap sheet 51 is adjacent to a material that is more hydrophilic or water-absorbent than the sheet 51 in the thickness direction.
Each factor is described in detail below.

  First, the above (1) will be described. By firmly fixing the antibacterial agent to the skin-side core wrap sheet 51, it becomes difficult to separate from the sheet 51 even when the antibacterial agent comes in contact with water moving in the thickness direction of the portion where the antibacterial agent is disposed. As a result, the antimicrobial agent becomes poorly mobile. As means for firmly fixing the antimicrobial agent to the core wrap sheet 51, physical fixing with an adhesive such as a hot melt to the constituent fibers of the sheet 51 can be typically mentioned.

  Next, the above (2) will be described. When the antibacterial agent is present on the surface of the fibers constituting the skin-side core wrap sheet 51, contact with water moving in the thickness direction of the portion where the antibacterial agent is disposed, and waste fluid flows from the wearer side The pressure and the like sometimes cause the antimicrobial agent to easily move away from the fiber surface and easily move to water. On the other hand, when the antibacterial agent is present inside the fibers constituting the skin-side core wrap sheet 51, the antibacterial agent is less likely to be detached than when it is present on the fiber surface, and the water mobility tends to be poor. In order for the antimicrobial agent to be present inside the fiber, a method of kneading the antimicrobial agent at the time of fiber production is typically mentioned.

  Next, the above (3) will be described. When a hydrophilic fiber material is used as the material of the skin-side core wrap sheet 51, the case of using an inherently hydrophilic material such as pulp (cellulose fiber) as the hydrophilic fiber material, and hydrophobicity In some cases, synthetic fibers treated with a hydrophilizing agent may be used. In the former case, since the pulp itself is hydrophilic and water-absorbent, the trapping of water in the pulp makes it easy for the antimicrobial agent present on the pulp to separate. In particular, if the antimicrobial agent is poorly soluble or insoluble in water and is not fixed to the pulp or present on the surface of the pulp, the antimicrobial agent is released from the pulp and transferred to the absorbent core 40. It will be easier.

  Next, the above (4) will be described. If the antibacterial agent is water soluble, the antibacterial agent is firmly fixed to the skin side core wrap sheet 51 as in the above (1), or the structure of the sheet 51 as in the above (2) The antimicrobial agent is easily transferred from the sheet 51 to the absorbent core 40 if it is not present on the surface of the fiber.

  When the antibacterial agent is poorly soluble in water, it means that the solubility in 100 g of ion-exchanged water at 25 ° C. is less than 20 g, and when the antibacterial agent is water insoluble, the solubility is 0.1 g or less Means As apparent from such a definition, water-insoluble antibacterial agents are also poorly water-soluble. Further, that the antibacterial agent is water soluble means that the solubility is 20 g or more.

  The solubility can be measured by the following method. A sufficiently dried measurement target (antibacterial agent) is added to 100 g of ion-exchanged water at 25 ° C. placed in a 200 mL beaker, a 20 mm long, 7 mm wide stirrer chip is inserted, and a magnetic stirrer is used at 600 rpm. The amount of the agent which can not be dissolved even after stirring and stirring for 1 hour immediately before is the solubility of the antibacterial agent in water at 25 ° C. As a magnetic stirrer, HPS-100 manufactured by As One Corporation can be used.

  The solubility of the poorly water-soluble or water-insoluble antibacterial agent in 100 g of ion-exchanged water at 25 ° C. is preferably 10 g or less, more preferably 1 g or less.

  Finally, the above (5) will be described. The skin-side core wrap sheet 51 contains an organic antibacterial agent, and the sheet 51 is more hydrophilic than the material (the absorbent core 40 in the present embodiment) adjacent to the non-skin facing surface in the thickness direction. Has been lowered. Therefore, when the skin-side core wrap sheet 51 comes in contact with the excrement, it can be said that the environment is such that the water in the excrement is unlikely to get wet and the excrement and the antibacterial agent easily stay in the sheet 51. However, when the skin-side core wrap sheet 51 containing an organic antibacterial agent is adjacent to a material having higher hydrophilicity or water absorption than this in the thickness direction, the water in the excrement enters the material. It becomes easy to be drawn in. The ease with which water is drawn from the skin-side core wrap sheet 51 of this excrement to a highly hydrophilic or highly water-absorptive material (the absorbent core 40 in the present embodiment) adjacent thereto is an organic component in the excrement and It makes it easy to move to a highly hydrophilic or highly water-absorbing material adjacent to the core wrap sheet 51 together with moisture in the state where the organic antibacterial agent coexists with each other due to the affinity. As the highly hydrophilic or highly water-absorptive material higher than the sheet 51, which is adjacent to the skin-side core wrap sheet 51 on the side opposite to the non-skin facing surface in the thickness direction, the absorbent core 40 is typically mentioned. An absorbent core comprising pulp that is more hydrophilic than the sheet 51 is preferred.

  The descriptions of (1) to (5) described above also apply to the antibacterial agent of the non-skin side core wrap sheet 52. However, in the case of (5) above, a material (in the present embodiment, the absorbent core 40) having a higher hydrophilicity or water absorbency than the non-skin side core wrap sheet 52 is on the skin facing surface side in the thickness direction of the sheet 52. Adjacent to the sheet 52.

The content (basis weight) of the antibacterial agent in each of the core wrap sheets 51 and 52 can be appropriately determined according to the type of the antibacterial agent and the like. For example the first antimicrobial agent, both the second antimicrobial agent, respectively, preferably 0.05 g / ^{m 2} or more, more preferably 0.10 g / ^{m 2} or more, and preferably 1.00 g / ^{m 2} or less, more preferably It is 0.50 g / m ² or less. The content (basis weight) of the antibacterial agent may be the same or different between the skin side core wrap sheet 51 and the non-skin side core wrap sheet 52.

  In this specification, the phrase "the first antimicrobial agent can move from the core wrap sheet to the absorbent core in contact with water" means that 1 mass of the first antimicrobial agent released from the core wrap sheet by the following measurement method It means that it is% or more, preferably 2% by mass or more. The “core wrap sheet” referred to here includes both the skin side core wrap sheet 51 and the non-skin side core wrap sheet 52.

  In addition, since the 1st antimicrobial agent of the skin side core wrap sheet 51 is an organic compound, it originates in the favorable affinity with the organic component contained in the excretion, and the 1st antimicrobial agent and the excretion coexist. It is easy to be The coexisting substance of the first antibacterial agent and the excrement easily moves to the absorbent core 40 together with the water in the excrement being drawn into the absorbent core 40. Therefore, the amount of movement of the first antibacterial agent contained in the skin side core wrap sheet 51 to the absorbent core 40 tends to fluctuate depending on the amount of the organic component contained in the excrement. For this reason, the presence of a large amount of the organic antibacterial agent in the absorbent core 40 from the initial use stage of the napkin 1 can be suppressed, and the hydrophilicity can be maintained, so that the absorption performance can be easily maintained in a good state. On the other hand, since the first antimicrobial agent remains in the skin side core wrap sheet 51, the following effects can be obtained. First, since the antibacterial action is maintained even in the skin-side core wrap sheet 51, the occurrence of odor can be suppressed even if excrement remains on the sheet 51. Second, when the napkin 1 is used for a long time, the first antibacterial agent can be continuously supplied from the skin side core wrap sheet 51 to the absorbent core 40, so that the antibacterial time of the absorbent core 40 is increased for a long time An effect is obtained. From such a point of view, the amount of the first antimicrobial agent detached from the skin side core wrap sheet 51 is preferably 20% by mass or less, and particularly preferably 10% by mass or less. It is preferable that the same applies to the amount of the first antibacterial agent which is released from the non-skin side core wrap sheet 52.

[Method of measuring the amount of the first antimicrobial agent which has been withdrawn]
The mass is measured after the core wrap sheet (100 mm × 100 mm) containing the first antimicrobial agent is sufficiently dried by an electric dryer. Thereafter, the upper and lower surfaces of the dried core wrap sheet are sandwiched by a pair of glass cylinders having a diameter of 60 mm and an opening diameter of 55 mm, and 3 mL of ion exchanged water is poured from the upper side in 1 ± 0.5 seconds. The glass cylinder is removed, and the mass of the core wrap sheet after it has been sufficiently dried by an electric dryer is measured. The amount of release of the first antimicrobial agent is calculated from the difference in mass of the core wrap sheet before and after the ion exchange water inflow operation. In addition, in the case of calculation of the amount of detachment | leaves, you may perform the device which reduces the measurement error of the amount of detachment | leave by performing the said operation with respect to 100 sheets-1000 core wrap sheets. Also, instead of measuring the mass of the core wrap sheet, the first antibacterial agent is extracted from the core wrap sheet using an appropriate solvent before and after pouring ion-exchanged water as described above, and then high-performance liquid chromatography is performed. The amount of the first antimicrobial agent which has been released may be calculated by quantitatively analyzing the amount of the first antimicrobial agent remaining in the core wrap sheet using a graph.

  As mentioned in the description of the above (5), the skin side core wrap sheet 51 is more hydrophilic than the material (the absorbent core 40 in the present embodiment) adjacent on the non-skin facing surface side in the thickness direction It is in a low state. Further, the non-skin side core wrap sheet 52 is in a state in which the relative hydrophilicity is lower than that of the material (the absorbent core 40 in the present embodiment) adjacent on the skin facing surface side in the thickness direction. Here, the core wrap sheets 51 and 52 in the “state with relatively low hydrophilicity” means that the hydrophilicity of constituent fibers (preferably pulp fibers) taken out from the sheets 51 and 52 by the following measurement method is: It means that it is lower than the hydrophilicity of constituent fibers (preferably water-absorbent fibers, more preferably pulp fibers) of a material (absorbent core) adjacent to the sheet in the thickness direction. "Hydrophilicity" as used herein is evaluated based on the contact angle of the constituent fibers of each member measured by the method described below, and the larger the contact angle, the stronger the hydrophobicity, and conversely the contact angle The smaller the size, the stronger the hydrophilicity. When the core wrap sheets 51 and 52 include pulp fibers, the contact angle of the pulp fibers is preferably 30 ° or more, more preferably 32 ° or more, and still more preferably 34 ° or more. On the other hand, when the material (absorbent core 40) adjacent to the core wrap sheets 51 and 52 in the thickness direction is configured to include pulp fibers, the contact angle of the pulp fibers is preferably less than 30 °, more preferably 28. Or less, more preferably 27 or less.

[Method of measuring contact angle]
The constituent fibers (pulp fibers) are taken out from the core wrap sheet to be measured and the material (absorbent core 40) adjacent to the sheet in the thickness direction, and the contact angle of water to the constituent fibers is measured. Hereinafter, the case where each constituent fiber is a pulp will be described.
As a measuring device, an automatic contact angle meter MCA-J manufactured by Kyowa Interface Science Co., Ltd. is used. Distilled water is used to measure the contact angle. The amount of liquid discharged from an ink jet system water droplet discharge unit (manufactured by Cluster Technology, pulse injector CTC-25 having a discharge diameter of 25 μm) is set to 20 pL, and the water droplets are dropped right above the pulp fibers. Then, the state of dropping is recorded on a high-speed recording device connected to a camera installed horizontally. From the viewpoint of later image analysis, the recording device is preferably a personal computer in which a high-speed capture device is incorporated. In this measurement, an image is recorded every 17 ms. In the recorded video, the first image in which water droplets have dropped on the pulp fibers taken from the core wrap sheet 51 and the absorbent core 40, attached software FAMAS (version of software is 2.6.2, analysis method is droplets Method, analysis method is θ / 2 method, image processing algorithm is non-reflection, image processing image mode is frame, threshold level is 200, curvature correction is not performed, and image analysis is performed to the air of water droplet The angle between the surface to be touched and the pulp fiber is calculated as the contact angle. Pulp fibers to be measured are cut to a fiber length of 1 mm, and the fibers are placed on the sample table of the contact angle meter and kept horizontal. Two different contact angles are measured per fiber. A contact angle of N = 5 pieces is measured to one digit after the decimal point, and a value obtained by averaging ten measured values in total (rounded to the second digit after the decimal point) is defined as the contact angle. In the following, the term "water contact angle" refers to the contact angle measured by the present measuring method.

  As the first antibacterial agent, in consideration of the above (1) to (5), it is preferable that the first antibacterial agent is disposed in the skin side core wrap sheet 51 so as to be water movable or water movable. In particular, the first antimicrobial agent is firmly fixed to the skin-side core wrap sheet 51 so that the poorly water-soluble or water-insoluble ionic substance fluctuates in the amount transferred to the absorbent core 40 depending on the organic matter in the excrement. It is preferable to arrange in the non-fixed state or the non-fixed state. As the poorly water-soluble or water-insoluble antibacterial agent, an ionic organic compound is preferred from the viewpoint of affinity to water or affinity to an organic component capable of being charged in the excrement, as compared to non-ionic type. In particular, cationic antibacterial agents such as benzalkonium cetyl phosphate, benzethonium chloride, benzalkonium chloride, cetyl pyridinium chloride and the like are preferable. The first antibacterial agent of the non-skin side core wrap sheet 52 can be the same as that of the skin side core wrap sheet 51.

  On the other hand, an antibacterial metal support is preferably used as the second antibacterial agent. As the antibacterial metal support, silver zeolite, divinylbenzene-2-vinylpyridine-2-vinylpyridine silver copolymer (for example, the one described in JP-A-2006-307404), aluminum, silver, sodium nitrate silicate (For example, those described in JP-A-2005-232654), A composite of silicon dioxide, zinc oxide, and aluminum oxide supporting silver or zinc (specifically, a metal-substituted cancrinite-like mineral supporting an antibacterial metal) And water-insoluble or water-insoluble antibacterial agents such as zirconium zirconium phosphate and mixtures of silver and zinc zeolites. In addition, even if the supported metal is water soluble that the antibacterial metal carrier is poorly water soluble or water insoluble, the carrier (preferably porous particles) carrying the antibacterial metal is poorly water soluble or water It means that it is insoluble.

  In addition to the device described above, in the napkin 1, as shown in FIGS. 2 and 3, the concave portion 6 and the convex portion 7 are present on the non-skin opposing surface of the absorbent core 40. Is not in conformity with the recess 6 and is in contact with the top of the protrusion 7.

  In the present embodiment, as described later, a plurality of regions different in position in the thickness direction of the absorbent core 40 exist on the non-skin facing surface of the absorbent core 40, specifically, relatively Where there is a region consisting of the non-skin facing surface of the standard absorbent portion 41 with a small thickness and a region consisting of the non-skin facing surface of the thick portions 42 and 49 with a relatively large thickness, thus, the absorbent core When there are a plurality of regions whose positions in the thickness direction are different from each other in the non-skin facing surface of 40, the concave portion 6 and the convex portion 7 exist as described above in at least one of the regions, and the non-skin side It is preferable that the core wrap sheet 52 does not follow the recess 6 and is in contact with the top of the protrusion 7. In the present embodiment, such a configuration is adopted in each of the standard absorption part 41 and the excretory part thick part 42.

  The recess 6 is a “dent” or “dent” formed on the non-skin-facing surface of the absorbent core 40, and is a convex portion on the skin-facing surface of the absorbent core 40. The recess 6 is typically a portion sandwiched between two protrusions 7 and 7 having the same thickness (the position of the non-skin facing surface) facing each other with a predetermined gap in one direction in the plane direction. There is an opening in the non-skin facing surface of the absorbent core 40. Moreover, the recessed part 6 does not penetrate the absorptive core 40 in the thickness direction, but the bottom part exists in the opposite side of the said opening.

  The recess according to the present invention such as the recess 6 includes: 1) the basis weight of the recess (that is, the basis weight of the bottom of the recess or the basis weight of a portion overlapping the recess in plan view); It may be a concave portion formed by reducing it compared to the convex portion), and 2) pressing treatment such as embossing on the surface of the absorbent core having a uniform basis weight and no unevenness on the surface (non-skin facing surface) It may be a recess formed by applying. Generally, the recess of the above 1) has the same density as the peripheral portion (that is, the convex portion) or is lower than that of the peripheral portion, but the recess of the above 2) has the absorbent core forming material compacted by pressing treatment. It is denser than the peripheral portion (that is, the convex portion).

  The non-skin opposing surface side of the absorptive core 40 is shown by FIG. The recess 6 of the non-skin opposing surface of the absorbent core 40 in the present embodiment has a groove-shaped vertical recess 6X extending in the vertical direction X and a groove-shaped extension extending in the horizontal direction Y, as shown in FIG. And a lateral recess 6Y. The longitudinal recesses 6X have a continuous linear shape extending in the longitudinal direction X, and a plurality of longitudinal recesses 6X are present at predetermined intervals in the lateral direction Y. The transverse recesses 6Y are in the form of a continuous straight line extending in the transverse direction Y, and a plurality of transverse recesses 6Y are present at predetermined intervals in the longitudinal direction X. The longitudinal recesses 6X and the lateral recesses 6Y cross each other, more specifically, are orthogonal to each other.

  Further, as shown in FIGS. 2 to 4, the absorbent core 40 according to the present embodiment has a thickness larger than that of the standard absorbent portion 41 and the standard absorbent portion 41 and has a thickness that protrudes toward the back sheet 3. And 42 and 49 are provided. As described above, in the present embodiment, the non-skin facing surface of the absorbent core 40 has irregularities, whereas the skin facing surface of the absorbent core 40 microscopically has a skin-side depression described later. Although it can be said that there is unevenness due to the presence of the portion 8 and the like, macroscopically, it does not have relatively large raised portions such as the thick portions 42 and 49 and is flat. As shown in FIG. 4, the two thick portions 42, 49 are intermittently arranged at predetermined intervals in the longitudinal direction X, and of the two, the excretable thick portion 42 disposed on the front side is The rear thick part 49 located at the central part in the lateral direction Y of the excretory part facing part B and disposed on the rear side is located at the central part in the width direction Y of the rear part C. The excretory part thick part 42 bulges outward from the central thick part 43 having a longitudinally long planar shape in the longitudinal direction X and the both side edges along the longitudinal direction X of the central thick part 43. It has a thickened portion 44, 44. The rear thick part 49 has a square shape in plan view.

  The absorbent core 40 in the present embodiment is formed by partially differing the deposition amount (basis weight) of the forming material (fiber material, water-absorbing polymer, etc.) of the absorbent core 40, and deposition of the forming material The portion with a relatively small amount is the standard absorbing portion 41, and the portion with a relatively large deposition amount of the forming material is the thick portions 42 and 49. The thick parts 42 and 49 have not only a thickness but also a large basis weight as compared with the standard absorption part 41.

  In this embodiment, the central thick portion 43 of the excretable-portion thick portion 42 is thus present on the non-skin-facing surface side of the surface sheet 2 as shown in FIG. At a central portion in the lateral direction Y of the skin facing surface, a front ridge 1F that protrudes toward the skin side of the wearer is formed. In addition, the existence of the rear thick part 49 on the non-skin facing surface side of the top sheet 2 causes the skin facing surface in the rear part C to project toward the wearer's skin at the center in the lateral direction Y. A rear ridge 1R is formed. It is preferable that the back ridge 1R be disposed to face the groin of the wearer when the napkin 1 is worn.

  In FIGS. 2 and 3, both sides of the absorber 4 in the lateral direction Y, more specifically, a portion including the side thick portion 44 and the standard absorption portion 41 (a relatively thin portion) Is not in contact with the back sheet 3 and the skin-facing surface of the napkin 1 (skin-facing surface of the top sheet 2) is substantially flat, but in practice it is not always in the state as shown. Absent. For example, from the state shown in FIG. 2 and FIG. 3, both sides in the lateral direction Y of the absorbent body 4 are in a state of hanging on the back sheet 3 side and contact with the back sheet 3. The central portion in the direction Y (the position where the central thick portion 43 is formed) may protrude toward the wearer's skin more than the two side portions. And if the both sides of transverse direction Y of absorber 4 hang down to the back sheet 3 side in this way, a front ridge 1F and a rear ridge 1R as shown in FIG.

  As shown in FIG. 4, the central thick portion 43 of the excretable portion thick portion 42 has straight side edges extending in the longitudinal direction X of the absorbent core 40, and has front and rear ends in the longitudinal direction X. Each of the portions has a shape in which the length in the lateral direction Y gradually decreases toward the outside in the longitudinal direction X. More specifically, the central thick portion 43 has arc-shaped front and rear end portions 43a and 43b, and as a whole, has an oblong, plan view shape having a major axis in the longitudinal direction X. Further, the central thick portion 43 of the excretory part thick part 42 may be formed only on the excretory part facing part B, but in the present embodiment, from the excretory part opposing part B to a part of the rear part C It is extended.

  In the present embodiment, as shown in FIG. 4, the recess 6 has a thickness that extends the excretory part thick part 42 from one end to the other end in at least one of the longitudinal direction X and the lateral direction Y, as shown in FIG. A section passing portion 61 is provided. More specifically, a part of the plurality of longitudinal recesses 6X present on the non-skin facing surface of the absorbent core 40 has a thickness extending from one end to the other end in the longitudinal direction X of the excretory part thick portion 42 It has a part passage part 61X. In addition, a part of the plurality of lateral recesses 6Y present on the non-skin facing surface of the absorbent core 40 is a thick portion passing portion 61Y extending from the one end to the other end in the lateral direction Y have. According to such a configuration, the excrement including the antibacterial agent supplied from the non-skin side core wrap sheet 52 is diffused rapidly in the entire excretory part thick part 42 through the thick part passing part 61 (61X, 61Y). You will come to

  In the present embodiment, as shown in FIG. 4, the non-skin facing surface side of the standard absorbent portion 41 of the absorbent core 40 is divided into a plurality of standard small absorbent portions 71 by the longitudinal recesses 6X and the lateral recesses 6Y intersecting each other. The respective standard small absorbent portions 71 are the convex portions 7 on the non-skin facing surface of the standard absorbent portion 41. In the non-skin facing surface of the standard absorbent portion 41, the concave portion 6 (6X, 6Y) having a linear shape in plan view and the convex portion 7 (standard small absorbent portion 71) having a quadrangular shape in planar view They are alternately present in each. Thus, the standard absorbent portion 41 in the present embodiment includes the standard small absorbent portion 71 (convex portion 7) having a relatively high basis weight, and the concave portion 6 surrounding the small absorbent portion 71 and having a relatively low basis weight. It has a block structure having many block areas consisting of (6X, 6Y). Due to the presence of the standard absorbent portion 41 having such a block structure, the absorbent core 40 becomes flexible in both the longitudinal direction X and the lateral direction Y, whereby the absorbent core 40 becomes the wearer's body. It is easy to follow the shape of

  Further, in the present embodiment, as shown in FIG. 4, the non-skin facing surfaces of the excretory part thick part 42 (the central thick part 43 and the side thick part 44) of the absorbent core 40 cross each other in the longitudinal direction. A plurality of thick portion small absorbing portions 72 are divided by the concave portion 6X (thick portion passing portion 61X) and the lateral concave portion 6Y (thick portion passing portion 61Y), and each thick portion small absorbing portion 72 is excreted. This is the convex portion 7 on the non-skin facing surface of the thick part 42. In the non-skin facing surface of the central thick portion 43, the concave portion 6 (6X, 6Y) having a linear shape in plan view and the convex portion 7 (thick small portion absorbing portion 72) having a square shape in a planar view The non-skin facing surface of the side thick portion 44 alternately exists in each of the lateral direction Y, and the concave portion 6 having a linear shape in plan view and the convex portion 7 having a trapezoidal shape in plan view (thick portion small absorbing portion 72 And are alternately present in the longitudinal direction X. Thus, the excretory part thick part 42 in the present embodiment surrounds the small absorbent part 72 and the thick small absorbent part 72 (convex part 7) having a relatively high basis weight, and relatively weighs it. Has a block structure having a large number of block areas each having a low concave portion 6 (6X, 6Y).

In the napkin 1, as described above, as shown in FIGS. 2 and 3, the skin side core wrap sheet 51 is in contact with or substantially in contact with the absorbent core 40. There is. When the excrement comes into contact with the skin side core wrap sheet 51, the excrement including the first antibacterial agent is transferred from the portion where the skin side core wrap sheet 51 and the absorbent core 40 are in contact to the absorbent core 40. It is drawn with. The first antimicrobial agent, which is organic, is not compatible with the water in the excrement, but has high affinity to the organic component in the excrement, so the organic component of the excrement and water and the first antimicrobial agent A coexistence is formed. Since this coexisting substance contains water, it moves to the absorbent core 40 which is a material adjacent to the skin side core wrap sheet 51 in the thickness direction. The moved coexisting substance suppresses the generation of odor in the absorbent core 40 by the antibacterial effect of the first antibacterial agent.
On the other hand, the concave portion 6 and the convex portion 7 exist in most of the non-skin facing surface of the absorbent core 40, specifically, the non-skin facing surface of each of the standard absorbent portion 41 and the excretory part thick portion 42, The non-skin-side core wrap sheet 52 does not follow the recess 6 and is in contact with the top of the protrusion 7. Here, “the non-skin-side core wrap sheet 52 does not follow the recess 6” means that the sheet 52 is not disposed along the wall that defines the recess 6, and A portion overlapping the recess 6 in the thickness direction is in non-contact with the absorbent core 40, meaning that it is in a state of floating from the absorbent core 40. That is, the non-skin side core wrap sheet 52 is not in full contact with the non-skin facing surface of the absorbent core 40, and partially at the top of the convex portion 7 (small absorbent portions 71, 72). It contacts and does not contact the absorbent core 40 at the formation position of the recess 6. Since the basis weight of the absorbent material in the absorbent core 40 corresponding to the recess 6 is smaller than that of the peripheral portion (convex 7), the excrement moves into the recess 6. The excrement that has moved to the recess 6 diffuses in the extending direction of the recess while being in contact with the side wall of the recess 6 and the non-skin side core wrap sheet 52. In the process of this diffusion, the excretory fluid takes in the first antibacterial agent contained in the non-skin side core wrap sheet 52 and is taken into the absorbent core 40 from the side wall of the recess 6. As a result, the excretory fluid is held in a region close to the non-skin side in the thickness direction of the absorbent core 40 in a state including a sufficient first antibacterial agent. Therefore, since the excrement is held in a state having sufficient antibacterial performance over a wide range in the surface direction and thickness direction of the absorbent core 40, generation of odor is suppressed. In addition, since the excrement is easily transferred to the non-skin surface side quickly by the concave portion 6, the excrement is unlikely to remain on the skin side core wrap sheet, and the growth of bacteria on the surface close to the skin can be suppressed. Since it is difficult for moisture to introduce an excess of the first antimicrobial agent into the absorbent core 40, it is difficult for the organic first antimicrobial agent to affect the absorbability.

  In particular, in the present embodiment, as shown in FIG. 4, since the longitudinal recesses 6 X and the lateral recesses 6 Y are formed as the recesses 6 on the entire non-skin facing surface of the absorbent core 40, the non-skin side core wrap sheet 52 The excrement including the first antibacterial agent supplied from the bottom is diffused in the longitudinal direction X from the excretory part facing portion B by the longitudinal concave portion 6X and is diffused in the transverse direction Y by the lateral concave portion 6Y. The waste containing the first antimicrobial agent can be quickly supplied to the entire 40 non-skin facing surfaces. In this "excrement containing the first antimicrobial agent supplied from the non-skin-side core wrap sheet 52", as described above, not only the first antimicrobial agent originally disposed on the sheet 52 but also the first The first antibacterial agent initially contained in the skin-side core wrap sheet 51 is also contained, which is an excrement containing the first antibacterial agent at a high concentration.

  The width of the recess 6, ie, the length in the direction orthogonal to the extending direction of the recess 6 (longitudinal direction, from the viewpoint of achieving the function and effect of the recess 6 (longitudinal recess 6X, lateral recess 6Y) more reliably. In the case of the recess 6X, the length in the transverse direction Y, and in the case of the transverse recess 6Y, the length in the longitudinal direction X) is preferably 1.0 mm or more, more preferably 1.5 mm or more, and preferably 5 mm or less, more Preferably it is 4.5 mm or less. The width of the recess 6 here means the width at the opening of the recess 6 (the width at the portion closest to the non-skin side core wrap sheet 52). If the width of the recess 6 is too small, there is a possibility that the function of the recess 6 as a conduction path may be insufficient. If the width of the recess 6 is too large, the non-skin side core wrap sheet 52 follows the recess 6 As a result, it may be difficult to quickly absorb excrement inside the absorbent core 40.

  From the same viewpoint, the distance Gx (see FIG. 4) between the longitudinal recesses 6X and 6X adjacent to each other in the lateral direction Y is preferably 5 mm or more, more preferably 8 mm or more, and preferably 20 mm or less, more preferably 17 mm or less It is. The interval Gy (see FIG. 4) between the horizontal recesses 6Y and 6Y adjacent to each other in the longitudinal direction X is preferably 10 mm or more, more preferably 13 mm or more, and preferably 35 mm or less, more preferably 32 mm or less.

  In the present embodiment, the depths of the plurality of recesses 6 (6X, 6Y) are constant over the entire length of the recess 6 in the extending direction (longitudinal direction). That is, the bottom of each recess 6 is present at a predetermined fixed position in the thickness direction of the absorbent core 40 over the entire length of the recess 6 in the extending direction. That is, in the vertical recess 6X having the thick portion passing portion 61X, the bottom (not shown) of a portion (a portion passing through the standard absorbing portion 41) of the vertical recess 6X other than the excretory portion thick portion 42 The bottom portion 61Xb (see FIG. 2) of the thick portion passage portion 61X in the vertical recess 6X and the thickness direction of the absorbent core 40 are at the same position. Further, in the lateral recess 6Y having the thick portion passing portion 61Y, as shown in FIG. 3, the bottom portion 6Yb of a portion (portion passing through the standard absorption portion 41) other than the excretory portion thick portion 42 in the lateral recess 6Y. Is at the same position in the thickness direction of the bottom portion 61Yb of the thick portion passage portion 61Y and the absorbent core 40.

  The excrement containing the first antibacterial agent supplied from the non-skin-side core wrap sheet 52 to the non-skin-facing surface of the absorbent core 40 is diffused in the surface direction by the recesses 6 of the non-skin-facing surface. From the viewpoint of efficient absorption, the basis weight of the recess 6 (6X, 6Y) is preferably lower than the basis weight of the protrusion 7 (71, 72). Further, the magnitude relation between the basis weight of the concave portion 6 and the convex portion 7 is such that the basis weight (thickness) of each of the standard absorbent portion 41 and the thick portions 42 and 49 in the absorbent core 40 of this embodiment is different. When there are a plurality of different regions, it is preferable that the magnitude relationship of “the basis weight of the recess 6 <the basis weight of the protrusion 7” be established in each region. That is, in the present embodiment, it is preferable that in the standard absorption unit 41, the magnitude relationship of “the basis weight of the recess 6 (6X, 6Y) of the standard absorption unit 41 <the basis weight of the standard small absorption unit 71” is established. In the excretory part thick part 42, it is preferable that the magnitude relation of “the basis weight of the concave part 6 (6X, 6Y) of the excretable part thick part 42 <the basis weight of the small thick part absorbent part 72” is established.

The basis weight of the recessed portion 6 (6X, 6Y) is preferably 20 g / m ² or more, more preferably 30 g / m, on condition that it is lower than the basis weight of the standard small absorption portion 71 and the thick small portion absorption portion 72. ² or more, and preferably 680 g / ^{m 2} or less, and more preferably not more than 640 g / ^{m 2.}
The basis weight of the standard small absorbent portion 71 is preferably 100 g / m ² or more, more preferably 150 g / m ² or more, and preferably 400 g / m ² or less, more preferably 350 g / m ² or less.
The basis weight of the thick portion small absorption portion 72 is preferably 300 g / m ² or more, more preferably 350 g / m ² or more, and preferably 850 g / m ² or less, more preferably 800 g / m ² or less.
The basis weight of the concave portion 6 (6X, 6Y) and the convex portion 7 (71, 72) is measured by the following method.

<Method of measuring basis weight>
It cut | disconnects using the feather blade manufactured by Feather Co. along the boundary line of the formation part (low basis weight part) of crevice 6 in absorptive core 40 of measurement object, and convex part 7 (high basis weight part). Ten pieces of high basis weight parts obtained by cutting were measured using an electronic balance (electronic balance GR-300 manufactured by A & D, precision: 4 digits after the decimal point), and one piece of high basis weight parts was used. Determine the average weight. The average weight thus determined is divided by the average area per small piece of high basis weight part to calculate the basis weight of the high basis weight part, and this is taken as the basis weight of the convex portion 7 (71, 72).
Next, along the border line extending in the longitudinal direction X of the napkin 1 among the border lines between the low basis weight part and the high basis weight part, the length 100 mm, the width conforms to the design dimension of the width of the low basis weight part Then, using a feather blade-made single-edged razor, cut five pieces in the longitudinal direction X of the thin stripe-shaped low basis weight portion. The obtained five small pieces are each measured using an electronic balance (electronic balance GR-300 manufactured by A & D, precision: 4 digits after the decimal point), and the average weight of one small basis weight part is determined on average. The basis weight of the low basis weight portion in the longitudinal direction X is calculated by dividing the determined average weight by the average area per small piece in the longitudinal direction X of the low basis weight portion, and the recess 6 extending in the longitudinal direction X The basis weight of the vertical recess 6X. The basic weight of the recess 6 extending in the lateral direction Y, that is, the lateral recess 6Y is also calculated in the same manner as the longitudinal recess 6X.

  As an example of the method of establishing the magnitude relation of “basal weight of concave portion 6 <basal weight of convex portion 7” in the absorbent core 40 in the known absorbent core manufacturing method using a fiber stacking device, The method of making the amount of fiber buildup of the formation material of a core differ by the recessed part 6 and the convex part 7 is mentioned. A known method of manufacturing an absorbent core typically comprises, at the bottom of an accumulation recess formed on the outer surface of a fiber deposition device (such as a rotating drum), a material for forming the absorbent core which has been supplied in an air stream and supplied. Since it has a process of suction and deposition, in such a process, the amount of fiber buildup of the forming material can be made partially different by using an accumulation recess in which the open area ratio of the bottom is partially different. Specifically, for example, the hole area ratio of the bottom corresponding to the formation planned portion of the recess 6 (longitudinal recess 6X, horizontal recess 6Y) is that of the protrusion 7 (standard small absorbing portion 71, thick portion small absorbing portion 72) The concave portion 6 is formed by using the accumulation concave which is higher than the opening ratio of the bottom corresponding to the formation planned site, and the bottom of the former is adjusted to allow the air flow to pass more easily than the bottom of the latter. An absorbent core 40 can be formed, which has a thin and low basis weight portion in which is formed and a thick and high basis weight portion in which the convex portion 7 is formed. In addition, in order to obtain the magnitude relationship of “the basis weight of the concave portion 6 <the basis weight of the convex portion 7”, the manufacturing method of the absorbent core described in Patent Document 1 may be used.

  In the present embodiment, as shown in FIGS. 1 to 4, the skin-side concave portion 8 in which the skin-side core wrap sheet 51 and the absorbent core 40 are integrally recessed is formed on the skin-facing surface of the absorber 4. There is. More specifically, the skin-side depression 8 has a pair of skin-side vertical depressions 81 and 81 extending in the longitudinal direction X at the excretory part facing part B, and the front part A has a lateral direction Y. And a posterior skin lateral recess 83 extending in the lateral direction Y at the rear portion C. As shown in FIG. Recesses 81, 82, 83 are connected to each other at the end in the direction in which they extend, and form a skin-side recess 8 having an annular (elliptical shape) planar view. In addition, the skin-side concave portion 8 has an intermediate skin-side lateral concave portion 84 extending in the width direction Y between the excretory part thick part 42 (the central thick part 43) and the rear thick part 49. doing. The pair of skin-side vertical recessed parts 81, 81 extend in the longitudinal direction X on both sides in the lateral direction Y of the central thick part 43, and the central thick part 43 is formed by the annular skin-side recessed part 8. It is surrounded. The skin-side recessed portion 8 (81, 82, 83, 84) in the present embodiment is formed by pressing (so-called embossing) with or without heat. In the skin side recessed part 8, the surface sheet 2, the skin side core wrap sheet 51, and the absorbent core 40 are integrated (joined). In the napkin 1, the depth of the skin-side recess 8 is constant over the entire length in the extending direction, but may be partially different. Further, the shape and the arrangement in plan view and the like of the skin side recessed portion 8 are not limited to the illustrated form, and can be set in the same manner as what is called leak-proof groove etc. in this type of absorbent article. It may be a shape including a shape or a curve, and may be continuous or discontinuous over the entire length in the extending direction. Examples of the discontinuous skin-side depression 8 include a form in which two types of portions having different depths are alternately arranged in the extension direction of the depression 8.

  Preferably, one or more recesses 6 are present between the pair of skin-side vertical recessed portions 81, 81. In the present embodiment, as shown in FIGS. 2 to 4, three vertical recesses 6 </ b> X exist between the pair of skin-side vertical recesses 81 and 81. In the skin-side depressions 8 such as the skin-side vertical depressions 81, the skin-side core wrap sheet 51 provided with the antimicrobial agent is firmly coupled and integrated with the absorbent core 40, so that the menstrual blood etc. are contained in the sheet 51. When the excrement of the present invention moves in the thickness direction, the antimicrobial agent in the portion of the sheet 51 located in the skin-side vertical recess 81 is more easily absorbed in the absorbent core 40 than the antimicrobial agent in the other portions. And, by the presence of one or more vertical concave portions 6X between the pair of skin side vertical recessed portions 81, 81 excellent in the function of promoting absorption of excrement into the inside of the absorbent core 40, each skin side The excrement including the first antimicrobial agent supplied from the skin-side core wrap sheet 51 of the vertical recessed portion 81 is diffused to the entire absorbent core 40 via the vertical recess 6X, whereby the inside of the absorbent core 40 is obtained. Propagation of the fungus in the plant can be suppressed more effectively. Further, in each of the skin-side lateral recessed parts 82, 83, 84, as in the skin-side vertical recessed part 81, the skin-side core wrap sheet 51 provided with the first antibacterial agent is firmly coupled and integrated with the absorbent core 40. In the presence of these, the above-described effects can be more reliably exhibited.

  In the present embodiment, as shown in FIG. 4, the recess 6 and the skin-side recess 8 partially overlap in plan view, more specifically, extending in the width direction Y with the vertical recess 6 X Skin side horizontal recessed parts 82, 83, 84 partially overlap in a plan view, and the horizontal recessed parts 6Y and the skin side vertical recessed parts 81 extending in the longitudinal direction X partially overlap in a plan view doing. In such a configuration, when the magnitude relation of “basal weight of concave portion 6 <basal weight of convex portion 7” described above is established, the skin side core wrap sheet 51 is supplied from the portion positioned in the skin side concave portion 8 The excrement including the first antimicrobial agent is rapidly diffused to the whole of the absorbent core 40 via the recess 6 (6X, 6Y) overlapping with the skin-side recess 8 in plan view, and the protrusion 7 to be efficiently absorbed into the interior of the absorbent core 40, and in combination with the above-described action and effect by the presence of one or more recesses 6 between the pair of skin-side vertical recessed portions 81, 81. Therefore, the suppression of the growth of the bacteria inside the absorbent core 40 can be more reliably achieved. In addition, even if excrement is not moved to the absorbent core 40, even if excrement remains in the skin-side core wrap sheet 51, because the concave portion 6 and the skin-side concave portion 8 partially overlap in plan view. The second antibacterial agent of the sheet 51 can effectively act on the excrement remaining in the sheet 51. Thus, one or more recesses 6 are present in a region sandwiched or surrounded by the skin-side recess 8, such as between a pair of skin-side vertical recesses 81 and 81, and the recess 6 and the skin-side recess 8 By partially overlapping with each other, it is possible to reliably exhibit an antibacterial action against both excrement existing inside and outside of the absorbent core 40 (such as the skin side core wrap sheet 51 and the surface sheet 2) In addition, such an effect can be made even more reliable by establishing the magnitude relationship of "basis weight of recess 6 <basis weight of convex 7".

  In particular, in the present embodiment, as shown in FIG. 4, the recess 6 has a longitudinal recess 6X extending in the longitudinal direction X and a lateral recess 6Y extending in the lateral direction Y, both recesses 6X and 6Y. Cross each other, and both the longitudinal recess 6X and the lateral recess 6Y partially overlap the skin-side recess 8 in plan view, so that the above-described effects can be achieved more reliably.

  Moreover, in the present embodiment, as described above, the absorbent core 40 is larger in thickness than the standard absorbent part 41 and the standard absorbent part 41, and the excretory part thick part 42 raised to the skin side of the wearer. And a relatively large amount of excrement is absorbed and held in the excretory part thick part 42, as shown in FIGS. 2 to 4, the skin side depression 8 (skin side vertical depression 81) is Since the excretory part thick part 42 (lateral thick part 44) is longitudinally cut in the longitudinal direction X, the first antibacterial agent of the portion of the skin side core wrap sheet 51 located in the skin concave part 8 is excreted It is easy to be supplied to the excretory part thick part 42 with a thing, and, thereby, it becomes possible to express an antimicrobial effect efficiently to a comparatively large amount of excrement.

  By the way, in the napkin 1, as described above, the first antibacterial agent is disposed on both the skin side core wrap sheet 51 and the non-skin side core wrap sheet 52, whereby the excrement with high concentration of the antibacterial agent is the absorbent core 40 In order to be able to produce a predetermined effect on the non-skin facing surface side of the above, in the napkin 1, from the viewpoint of more reliably achieving such an effect, The configuration of the absorbent core 40 is devised. That is, in the present embodiment, as shown in FIG. 2 and FIG. 3, at the position where the non-skin opposing surface (the opposing surface to the back sheet 3) of the absorber 4 overlaps the skin side recessed portion 8 in the thickness direction A non-skin side recess 9 in which the side core wrap sheet 52 and the absorbent core 40 are integrally recessed is formed. The non-skin side recessed part 9 has the same plan view shape as the skin side recessed part 8, and is overlapped with the parts 81 to 84 of the skin side recessed part 8 in the thickness direction on the non-skin facing surface of the absorber 4 The portions 81 to 84 have the same shape in plan view. The non-skin side recessed part 9 is typically formed by pressing at the time of pressing when the skin side recessed part 8 is formed according to a conventional method by squeezing processing such as embossing on the skin facing surface of the absorber 4 The non-skin side recessed part 9 formed in the non-skin opposing surface of the absorber 4 and formed in this way substantially coincides with the skin side recessed part 8 in a plan view of the absorber 4.

  As shown in FIG. 2 and FIG. 3, in the inside of the absorbent body 4 (absorbent core 40) in which the skin side recess 8 and the non-skin side recess 9 are formed as described above, There is a high density portion 45 sandwiched. The high density portion 45 is in the form of a flat line of sight corresponding to the two concave parts 8 and 9 in the form of flat line of sight. When such a high density portion 45 is present inside the absorbent core 40, the excrement including the antibacterial agent supplied from the skin side core wrap sheet 51 is easily led to the high density portion 45, so that the antibacterial agent is used. Fungal propagation in the absorbent core 40 can be suppressed more reliably.

  In particular, in the napkin 1, since the antibacterial agent is disposed in the non-skin side core wrap sheet 52, the presence of the high density portion 45 causes the excrement including the antibacterial agent to be absorbed inside the absorbent core 40 and further absorbed. The excrement comes into contact with the sheet 52 covering the non-skin opposing surface by being easily led to the non-skin opposing surface side of the sex core 40, and the antimicrobial agent blended in the sheet 52 is high. It will be diffused along the density portion 45 to the entire non-skin facing surface of the absorbent core 40. Therefore, on both the skin-facing surface side and the non-skin-facing surface side of the absorbent body 4, the antibacterial effect of the antimicrobial agent disposed in the core wrap sheets 51 and 52 is expressed, and a large amount of excrement is discharged. It becomes possible to express an antimicrobial effect efficiently.

  From the viewpoint of more reliably achieving the function and effect by the high density portion 45 inside the absorbent core 40 described above, the height between the skin side recessed portion 8 and the non-skin side recessed portion 9 is high. The density portion 45 is, in particular, compared to the bottom of at least one of all the recesses 6 (6X, 6Y) present in the absorbent core 40, in particular to the bottom of the recess 6 adjacent to the high density portion 45. In particular, it is preferable that the non-skin facing surface of the absorber 4 be closer to the bottom of all the recesses 6 in the absorbent core 40. According to such a configuration, the excrement including the first antibacterial agent supplied from the skin-side core wrap sheet 51 is high via the wall defining the recess 6 while moving the recess 6 toward the opening thereof. The density portion 45 can be reached, and the above-described effects of the high density portion 45 can be more reliably exhibited. Note that the above-mentioned configuration “the high density portion 45 is closer to the non-skin facing surface of the absorber 4 compared to the bottom portion of at least one of all the concave portions 6 present in the absorbent core 40” This means a configuration in which both side portions in the lateral direction Y of the body 4 are substantially horizontal as shown in FIGS. 2 and 3 without drooping to the back sheet 3 side.

  Further, in the present embodiment, as described above, the recess 6 has the lateral recess 6Y extending in the lateral direction Y, and the lateral recess 6Y includes the skin side recess 8 and the non-skin as shown in FIG. There is a concave portion longitudinal section 62 in which the side concave section 9 is longitudinally cut, and as described above, the concave section longitudinal section 62 has a high density portion 45 (embedded in both concave portions 8 and 9 as shown in FIG. Portion) is present, the bottom of the recess longitudinal section 62 in the lateral recess 6 Y is in the lateral direction Y of the recess longitudinal section 62 in the lateral recess 6 Y due to the presence of the non-skin side recess 9. It is closer to the skin-facing surface (skin-side core wrap sheet 51) of the absorbent core 40 than the bottom of the portion (non-skin-side recessed portion 9 absent portion) located on both sides of. In FIG. 3, the bottom of the horizontal recess 6Y indicated by reference numerals 6Yb and 61Yb is closer to the skin facing surface of the absorbent core 40 at both the formation positions of the depression longitudinal section 62 than on both sides of the formation position. Is shown. The recessed portion longitudinal cross section 62 of the horizontal recess 6Y having such a configuration has an action to inhibit outward movement of excrement such as menstrual blood etc. in the lateral direction Y, so that lateral leakage is prevented and excrement Diffusion in the longitudinal direction X of x is further promoted.

  Further, from the viewpoint of further improvement of the function and effect by the recessed portion longitudinal section 62 described above, the density of the absorbent core 40 is (1) a portion other than the recessed section longitudinal section 62 in the horizontal recess 6Y, (2) the recessed section It is preferable that the longitudinal section 62, (3) a portion other than the skin side recessed portion 8 in the convex portion 7, and (4) the skin side recessed portion 8 be lower in order. That is, in the absorbent core 40, it is preferable that the (1) has the lowest density and the (4) has the highest density. By establishing such a size relationship with respect to the density of each part of the absorbent core 40, it is easy for the excrement such as menstrual blood to be concentrated on the convex portion 7 (71, 72) having a relatively large amount of liquid absorption, The antibacterial efficiency of the first antibacterial agent supplied together with the excrement from the side core wrap sheet 51 and the non-skin side core wrap sheet 52 is further improved, and the liquid retaining property of the absorbent core 40 is improved. Side-leakage prevention effect is more reliably achieved. The density of each part of the absorbent core 40 can be measured by a conventional method.

  From the viewpoint of the further improvement of the function and effect related to the skin side recessed portion 8 (81, 82, 83, 84) described above and the non-skin side recessed portion 9 corresponding to this, the recessed portion 6 (6X , 6Y) (the length in the direction orthogonal to the extending direction of the recess 6) is shorter than the width of the skin-side recess 8 (the length in the direction orthogonal to the extending direction of the skin-side recess 8) Is preferred. Thus, when the magnitude relation of "the width of the concave portion 6 <the width of the skin side concave portion 8" is established, the concave portion 6 relatively distant from the skin of the wearer of the napkin 1 is the skin relatively near to the skin. Since the capillary force acts more than the side recessed portion 8, the excrement of excrement can be improved, and the movement of the excrement from the skin-facing surface side to the non-skin-facing surface side can be smoother. The ratio of the width of the recess 6 to the width of the skin-side recess 8 is preferably 0.2 or more, more preferably 0.3 or more, and preferably 0.8 as the former / the latter, on the premise of the former <the latter. Or less, more preferably 0.7 or less. The width of the skin side recess 8 here is the width at the opening of the skin side recess 8 (the width at the portion closest to the skin side core wrap sheet 51), similarly to the width of the recess 6 described above. means.

  Further, in the present embodiment, as described above, the overlapping portion 54 of both end portions in the lateral direction Y of one wide core wrap sheet 53 constituting the skin side core wrap sheet 51 and the non-skin side core wrap sheet 52 is As shown in FIG. 2 and FIG. 3, when the absorbent core 40 (absorbent body 4) is located on the non-skin facing surface, the overlapping portion 54 and the absorbent core 40 in the thickness direction Longitudinal recesses 6X) extend in the longitudinal direction X. And in the napkin 1, since the antibacterial agent is distribute | arranged to the non-skin side core wrap sheet 52, an antibacterial agent will be distribute | arranged to the overlap part 54 of the structure by which this sheet | seat 52 was laminated two sheets, At the overlapping portion 54, the antimicrobial agent is present at a relatively high basis weight. By the presence of the vertical recess 6X at a position overlapping with the overlapping portion 54 where such an antibacterial agent is present at high density in plan view, movement from the skin facing surface side to the non-skin facing surface side via the vertical recess 6X The excreted excrement comes into contact with the overlapping portion 54, whereby a high antibacterial effect can be obtained.

  In particular, in the present embodiment, as shown in FIGS. 2 and 3, the overlapping portion 54 is located at the central portion in the lateral direction Y of the absorbent body 4 (napkin 1) where excrement such as menstrual blood is most concentrated. Therefore, it can efficiently exert an antibacterial action on excrement.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, the absorbent article of this invention is not restrict | limited at all to the said embodiment, It can change suitably.
For example, from the viewpoint of improvement in absorbency, leakproofness, etc., between the surface sheet 2 and the absorbent body 4 (skin side core wrap sheet 51), paper or various non-woven fabrics also called a second sheet, sublayer sheet, etc. A liquid permeable sheet may be interposed.
The absorbent article of the present invention may be, for example, a panty liner (a cage sheet) or the like in addition to the sanitary napkin as shown.
All parts that only the one embodiment described above has can be used mutually as appropriate.

1 Sanitary napkin (absorbent article)
2 top sheet 3 back sheet 4 absorber 40 absorbent core 41 standard absorption part 42 excrement part thick part 43 central thick part 44 side thick part 45 high density part (skin side recessed part and non-skin side recessed part Part between)
49 back thick part 51 skin side core wrap sheet 52 non-skin side core wrap sheet 53 wide core wrap sheet 54 overlapping part of both ends of the wide core wrap sheet in the transverse direction 5 absorptive main body 6 recess 6 6 vertical recess 6 Y horizontal recess 61 X , 61Y Thick part passing part 62 recessed part vertical part 7 convex part 71 standard small absorbing part 72 thick part small absorbing part 8 skin side recessed part 81 skin side vertical recessed part 82 front skin side horizontal recessed part 83 rear skin side horizontal Concave part 84 Intermediate skin side lateral concave part 9 Non-skin side concave part A Front part B Discharge part opposite part C Rear part

Claims (8)

A discharge portion facing portion including a discharge spot portion which has a vertical direction corresponding to the front-rear direction of the wearer and a horizontal direction orthogonal thereto, and includes a discharge spot portion disposed opposite to the discharge portion of the wearer in the vertical direction; A front sheet which is divided into a front part disposed on the ventral side of the wearer than the facing part and a rear part disposed on the back of the wearer relative to the excretory part facing part, and which forms a skin facing surface; An absorbent article comprising a back sheet forming a non-skin-facing surface, and an absorber positioned between the two sheets,
The absorbent body comprises a liquid-retaining absorbent core, a skin-side core wrap sheet covering the skin-facing surface of the absorbent core, and a non-skin-side core wrap sheet covering the non-skin-facing surface of the absorbent core. And consists of, and
The skin-side core wrap sheet and the non-skin-side core wrap sheet include an organic antimicrobial agent capable of moving from the core wrap sheet to the absorbent core in contact with water,
The non-skin facing surface of the absorbent core has a recess and a protrusion, and the non-skin side core wrap sheet does not follow the recess and is in contact with the top of the protrusion .
A skin-side depression in which the skin-side core wrap sheet and the absorbent core are integrally recessed is formed on the skin-facing surface of the absorbent body.
The skin-side depression has a pair of skin-side vertical depressions extending in the vertical direction in the excrement-part-facing portion, and the depression is present between the pair of skin-side vertical depressions.
A non-skin-side recess in which the non-skin-side core wrap sheet and the absorbent core are integrally recessed is formed at a position overlapping in the thickness direction with the skin-side recess in the non-skin-facing surface of the absorber. Absorbent article. The portion sandwiched between the skin-side recess and the non-skin-side recess is opposite to the non-skin of the absorber in comparison with the bottom of at least one of all the recesses in the absorbent core. The absorbent article according to claim 1 , which is close to a surface. The recess has a lateral recess extending in the lateral direction, and in the lateral recess, there is a recess longitudinal section in which the skin-side recess and the non-skin-side recess are longitudinally cut.
Bottom of the recess longitudinal portion in the transverse recess, than the bottom of the portion positioned laterally opposite sides of the recessed portion longitudinal section in lateral recess claim close to the skin-facing side of the absorbent core 1 Or the absorbent article as described in 2 . The density of the absorbent core is lower in the order of the portion of the lateral recess other than the recess longitudinal portion, the recess longitudinal portion, the portion of the protrusion other than the skin side recess, and the skin side recess in this order Item 3. The absorbent article according to item 3 . The width of the recess, the absorbent article according to any one of the skin-side recessed shorter claim 1 than the width of the portion 4. The absorbent core has a standard absorbent part, and a thick part which is thicker than the standard absorbent part and which protrudes to the back sheet side.
The recess in at least one direction of longitudinal and transverse direction, the thick portion in any one of claims 1 to 5 having a thick portion passing portion extending over the other end from one end of the one-way The absorbent article as described. A discharge portion facing portion including a discharge spot portion which has a vertical direction corresponding to the front-rear direction of the wearer and a horizontal direction orthogonal thereto, and includes a discharge spot portion disposed opposite to the discharge portion of the wearer in the vertical direction; A front sheet which is divided into a front part disposed on the ventral side of the wearer than the facing part and a rear part disposed on the back of the wearer relative to the excretory part facing part, and which forms a skin facing surface; An absorbent article comprising a back sheet forming a non-skin-facing surface, and an absorber positioned between the two sheets,
The absorbent body comprises a liquid-retaining absorbent core, a skin-side core wrap sheet covering the skin-facing surface of the absorbent core, and a non-skin-side core wrap sheet covering the non-skin-facing surface of the absorbent core. And consists of, and
The skin-side core wrap sheet and the non-skin-side core wrap sheet include an organic antimicrobial agent capable of moving from the core wrap sheet to the absorbent core in contact with water,
The non-skin facing surface of the absorbent core has a recess and a protrusion, and the non-skin side core wrap sheet does not follow the recess and is in contact with the top of the protrusion.
The skin-side core wrap sheet and the non-skin side core wrap sheet, including absorption Osamusei article the second antimicrobial agent is difficult to move by contact with water than the antimicrobial agent. Constituent fibers including the skin-side core wrap sheet and the respective non-skin side core wrap sheet wherein the antimicrobial agent is according to any one of the absorbent core of the constituent fibers hydrophilic low claim 1-7 than Absorbent articles.

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