JP6494889B1 - Absorbent articles - Google Patents

Abstract

It is an object of the present invention to provide an absorbent article that can suppress the accumulation of malodorous components around the wearer's skin during wearing and can be used in a sanitary manner without worrying about odors derived from excrement.
The absorbent body (4) in the absorbent article (1) is a liquid-retaining absorbent core (40).
And a core wrap sheet (53) that covers the skin facing surface and the non-skin facing surface of the absorbent core (40), and the core wrap sheet (53) contains an antibacterial agent. In the absorbent core (40), there is a lateral communication passage 6 (60, 61) having an opening in at least one of the skin facing surface and the non-skin facing surface of the absorbent core (40) and extending in the lateral direction Y. The absorbent core 40 is continuously arranged from one end to the other end in the lateral direction Y.
[Selection] Figure 3

Description

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

  In an absorbent article such as a sanitary napkin, if there is a gap between the wearer's skin and the skin, the excrement such as menstrual blood flows to the buttocks etc. along the skin surface, It may lead to liquid leakage. On the other hand, in the absorbent core in the absorbent article, a skin-facing surface is formed by forming a thick part thicker than the peripheral part at a part disposed opposite to the excretion part such as the vaginal opening of the wearer. A technique for improving the fit of an absorbent article to the body and preventing liquid leakage is known. Moreover, the block-shaped absorptive core provided with the groove-shaped space extended in the plane direction is known (patent documents 1 and 2).

  Moreover, in an absorbent article, the unpleasant odor derived from the excrement during wearing is a problem which is worrisome for a wearer and the surrounding people. In order to solve this problem, a deodorant or an antibacterial agent has been conventionally added to an absorbent article. For example, Patent Document 3 discloses that a core wrap sheet covering an absorbent core contains a cationic antibacterial agent and a pH buffering deodorant, and these agents are eluted in the excretion permeation route, thereby continuously The technique which aimed at expression of a deodorizing effect is described. Further, Patent Document 4 discloses a center height in which a high basis weight portion and a low basis weight portion are alternately formed in the longitudinal direction or the lateral direction at the lateral center portion of the absorbent core in the excretion portion facing portion of the absorbent article. It is described that a ventilation region is provided and a deodorizing sheet containing a deodorizing agent such as activated carbon is disposed between the absorbent core and the back sheet in the central high ventilation region. According to the absorbent article described in Patent Document 4, the odorous component contained in menstrual blood flows through the absorbent core with improved air permeability and is efficiently adsorbed on the deodorant sheet. It is said that not only the odor at the time when there is a large amount but also excellent deodorizing performance can be obtained even when used at a time when the amount of menstrual blood is low.

Japanese Patent Laid-Open No. 2006-199982 International Publication No. 2016/064994 Japanese Patent Laid-Open No. 2006-169446 JP, 2006-120192, A

  According to the absorbent article of the prior art, when a malodorous component is generated during the wearing of the absorbent article, the malodorous component is indefinitely around the wearer's skin, such as between the absorbent article and the wearer's skin. If they stay, the unsanitary environment may be left unattended, which may cause skin problems, and the accumulation and alteration of malodorous components may cause odors to become worse and cause wearer stress. There is also a risk of becoming.

  Accordingly, an object of the present invention is to provide an absorbent article that can eliminate the drawbacks of the above-described conventional technology, and specifically, that malodorous components accumulate around the wearer's skin during wearing. The present invention relates to providing an absorbent article that can be suppressed and can be used in a sanitary manner without worrying about odor derived from excrement.

  The present invention has a longitudinal direction corresponding to the wearer's front-rear direction and a lateral direction perpendicular thereto, and in the longitudinal direction, an excretion part facing part including an excretion spot part disposed to face the wearer's excretion part; The skin is divided into a front part disposed on the abdomen side of the wearer relative to the excretion part facing part and a rear part disposed on the back side of the wearer than the excretion part facing part to form a skin facing surface. An absorbent article comprising a top sheet, a back sheet forming a non-skin facing surface, and an absorbent body positioned between both sheets, the absorbent body comprising a liquid-retaining absorbent core, A core wrap sheet covering the skin facing surface and the non-skin facing surface of the absorbent core, wherein the core wrap sheet contains an antibacterial agent, and the skin of the absorbent core is contained in the absorbent core A lateral surface having an opening in at least one of the facing surface and the non-skin facing surface and extending in the lateral direction Passage is an absorbent article being arranged continuously over the other end from the side end of the absorbent core.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which can suppress that a malodorous component accumulate | stores around a wearer's skin during wear and can be used hygienically without worrying about the smell derived from excrement is provided. The

FIG. 1 is a perspective view showing a skin facing surface side (surface sheet side) of a sanitary napkin that 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 II in FIG. 1 (cross section taken along the same line as line II in FIG. 4). FIG. 3 is a longitudinal sectional view schematically showing a section taken along line II-II in FIG. FIG. 4 is a plan view showing the non-skin facing surface side of the absorbent core in the sanitary napkin of FIG. 1. FIG. 5 is a perspective view showing the non-skin facing surface side of the absorbent core in the sanitary napkin of FIG. 1. FIG. 6: is a top view which shows the skin opposing surface side (surface sheet side) of the sanitary napkin which is other embodiment of the absorbent article of this invention.

  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 that forms a skin facing surface, a back sheet 3 that forms a non-skin facing surface, and a liquid-retaining absorbent 4 that is positioned between the two sheets 2 and 3.

  In the present specification, the “skin-facing surface” is a surface of the absorbent article or a component thereof (for example, the absorbent body 4) that is directed toward the wearer's skin when the absorbent article is worn, that is, relative to the wearer's skin. The side close to the skin, and the “non-skin facing surface” is directed to the side opposite to the skin side when the absorbent article is worn, that is, the side that is relatively far from the wearer's skin. It is the surface to be. In addition, "at the time of wearing" here means the state in which the normal proper wearing position, that is, the correct wearing position of the absorbent article is maintained.

  As shown in FIG. 1, the napkin 1 has a longitudinal direction X corresponding to the wearer's front-rear direction, extending from the wearer's abdomen side to the back side via the crotch portion, and a transverse direction Y orthogonal thereto. In addition, in the longitudinal direction X, an excretion part facing part B including an excretion spot part (not shown) facing the excretion part such as the vaginal opening of the wearer, and the abdomen side of the wearer from the excretion part facing part B It is divided into three parts: a front part A arranged on the (front side) and a rear part C arranged on the back side (rear side) of the wearer rather than the excretory part facing part B. In the following description, unless otherwise specified, the longitudinal direction X is the 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 lateral direction Y is the transverse direction of the absorbent article. It is the direction along the transverse direction Y of the absorbent article in the direction Y or its constituent members.

  As shown in FIG. 1, the napkin 1 has an absorptive main body 5 that is long in the vertical direction X, and outwards in the lateral direction Y from both side portions along the vertical direction X of the excretory part-facing portion B of the absorbent main body 5. And a pair of wing portions 11, 11 extending to the front. The absorptive main body 5 is a main part of the napkin 1 and includes the top sheet 2, the back sheet 3 and the absorber 4, and in the longitudinal direction X, the front part A, the excretory part facing part B, and the rear part C. It is divided into three.

  In addition, the excretion part opposing part in the absorbent article of this invention is the longitudinal direction (longitudinal direction, in the figure) of this absorbent article, when the absorbent article has a wing part like the napkin 1 shown in FIG. If the napkin 1 is taken as an example, it is sandwiched between the root along the vertical direction X of one wing portion 11 and the root along the vertical direction X of the other wing portion 11. This area Moreover, although not shown in figure, the excretion part opposing part in the absorbent article which does not have a wing part is an area | region of the center of the vertical direction when this absorbent article is equally divided into 3 area | regions in the vertical direction. is there.

  As shown in FIGS. 1 to 3, the top sheet 2 covers the entire skin facing surface of the absorbent body 4. On the other hand, the back sheet 3 covers the entire area of the 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 to be described later. 13 and the side flap part 10 are formed. The side flap portion 10 is a portion made of a member that extends outward in the lateral direction Y from the absorber 4. The back sheet 3 and the side leak-proof sheet 13 are joined to each other by known joining means such as an adhesive, a heat seal, and an ultrasonic seal at the extended portions from both side edges along the longitudinal direction X of the absorber 4. Yes. In the napkin 1, the absorbent body 4 is thus sandwiched between the top sheet 2 and the back sheet 3, and the top sheet 2 or the side leak-proof sheet 13 and the back sheet 3 are joined around the entire outer edge of the napkin 1. Yes. For joining between the sheets constituting the napkin 1, any joining means such as an adhesive, heat sealing, ultrasonic sealing or the like is used.

  As shown in FIG. 1, the side flap portion 10 is greatly extended outward in the lateral direction Y at the excretory portion facing portion B, and thereby a pair of side flap portions 10 is provided on both left and right sides along the longitudinal direction X of the absorbent main body 5. The wing parts 11, 11 are extended. The non-skin facing surface of the wing part 11 is provided with a wing part adhesive part (not shown) for fixing the wing part 11 to clothing such as shorts. The wing part 11 is used by being folded back to the non-skin facing surface (outer surface) side of the crotch part of clothes such as shorts. The wing adhesive section is covered with a release sheet (not shown) made of a film, nonwoven fabric, paper, or the like before use.

  As shown in FIG. 1, a pair of side leak-proof sheets 13, 13 are provided on the skin facing surface sides of both end portions in the lateral direction Y of the top sheet 2 (that is, both side edges along the longitudinal direction X of the top sheet 2). Is arranged. The side leak-proof sheet 13 forms the skin facing surface of the napkin 1 together with the top sheet 2. The pair of side leak-proof sheets 13 and 13 are respectively disposed over substantially the entire length in the longitudinal direction X of the absorbent main body 5 and are relatively close to the lateral center line CLy that bisects the napkin 1 in the lateral direction Y. It has an inner end portion 13a and an outer end portion 13b that is relatively far from the lateral center line CLy. The inner end portion 13a of the side leak-proof sheet 13 overlaps with the end portion in the lateral direction Y of the absorber 4 (absorbent core 40) in plan view (that is, the side edge portion along the longitudinal direction X of the absorber 4). That is, it overlaps with the end in the transverse direction Y of the absorber 4 in the thickness direction. The outer end 13 b of the side leak-proof sheet 13 is located outward in the lateral direction Y of the absorber 4. The side leak-proof sheet 13 is joined to the top sheet 2 or the back sheet 3 by a known joining means such as an adhesive at an outer position in the lateral direction Y than the inner end 13a, and the inner end 13a is As shown in FIG. 2, it is unfixed with respect to the surface sheet 2, and is a free end.

  In addition, one or a plurality of elastic members may be arranged in an elongated state in the vertical direction X on the inner end portion (free end portion) 13 a of the side leak-proof sheet 13. In that case, when the napkin 1 is worn, the inner end 13a of the side leak-proof sheet 13 stands up toward the wearer's skin due to the contraction force of the elastic member, thereby forming a leak-proof cuff. The leak-proof cuff is effective in preventing lateral leakage of excreta such as menstrual blood excreted on the skin facing surface of the napkin 1.

  As the top sheet 2, the back sheet 3, and the side 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 liquid permeable nonwoven fabric or a perforated film can be used. As the back sheet 3, a water-repellent nonwoven fabric having a high water pressure resistance such as a liquid-impermeable film made of a synthetic resin or a spunbond-meltblown-spunbond laminated nonwoven fabric can be used. As the side leak-proof sheet 13, a water-repellent nonwoven fabric having high water pressure resistance, for example, a spunbond-meltblown-spunbond laminated nonwoven fabric or the like can be used.

  The absorbent body 4 includes a liquid-retaining absorbent core 40, a skin-side core wrap sheet 51 that covers the skin facing surface of the absorbent core 40, and a non-skin side core that covers the non-skin facing surface of the absorbent core 40. A wrap sheet 52 is included. In the present embodiment, the absorbent core 40 and the napkin 1 are formed symmetrically with respect to a lateral center line CLy (see FIG. 1) that bisects the absorbent body 5 in the lateral direction Y. The absorbent core 40 in the napkin 1 is made of a fiber assembly made of a fiber material such as pulp fiber, or a fiber assembly in which a water-absorbing polymer is held. The core wrap sheets 51 and 52 play roles such as preventing leakage of the forming material of the absorbent core 40 and improving the shape retention of the absorbent core 40. Between the top sheet 2 and the skin-side core wrap sheet 51, and between the back 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, and stripes. It is preferable.

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

More specifically, the core wrap sheet 53 has a width that is not less than twice and not more than three times the length of the absorbent core 40 in the transverse direction Y, and has a relatively long length (width) in the transverse direction Y. And covering the entire skin facing surface of the absorbent core 40 and extending outward from both side edges along the longitudinal direction X of the absorbent core 40 in the lateral direction Y. The whole surface of the non-skin-facing surface of the absorbent core 40 is covered by being wound down below 40. And in this one 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 core. In this embodiment, the skin side core wrap sheet 51 and the non-skin side core wrap sheet 52 are the same. The basis weight of the core wrap sheet 53 is preferably 5 g / m ² or more, more preferably 10 g / m ² or more, and preferably 40 g / m ² or less, more preferably 30 g / m ² or less.

  The core wrap sheet 53 is typically a sheet-like material such as a nonwoven fabric or paper mainly composed of hydrophilic fibers. Examples of the hydrophilic fibers contained in the core wrap sheet 53 include natural fibers such as wood pulp such as softwood pulp and hardwood pulp, non-wood pulp such as cotton pulp and hemp pulp; modified pulp such as cationized pulp and mercerized pulp; Regenerated fibers such as cupra and rayon; Semi-synthetic fibers such as acetate; Hydrophilic synthetic fibers such as polyvinyl alcohol fiber and polyacrylonitrile fiber; Synthetic fibers such as polyethylene terephthalate fiber, polyethylene fiber, polypropylene fiber, and polyester fiber are hydrophilized The fiber etc. which gave are mentioned, These 1 type can be used individually or in mixture of 2 or more types. Typical hydrophilic fibers in the core wrap sheet 53 are natural fibers, cellulosic regenerated fibers or semi-synthetic fibers. The core wrap sheet 53 may further include a synthetic fiber (hydrophobic fiber), for example, a thermoplastic fiber, in addition to the hydrophilic fiber. As the thermoplastic fiber, for example, a single fiber formed using a single synthetic resin such as polyethylene, polypropylene, polyester, or polyurethane, or a synthetic resin such as a composite of two or more of these is used. A composite fiber such as a core-sheath type or a side-by-side type composite fiber formed using two or more kinds of synthetic resins can also be used.

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

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

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

  Since the napkin 1 has the horizontal communication path 6 (60, 61) which crosses the absorptive core 40 in the horizontal direction Y, between the napkin 1 and the wearer's skin during the wear, menstrual blood, etc. Even if the malodorous component derived from the excrement is generated, the malodorous component is promptly released to the outside of the napkin 1 through the lateral communication passage 6. Therefore, according to the napkin 1, inconvenience due to the stench component staying between the napkin 1 and the wearer's skin for a long time, for example, the skin trouble caused by the stench component or the stench is worse, and the outside. Generation | occurrence | production of the wearer's stress etc. resulting from discharge | release is effectively prevented. In the first place, as described above, the napkin 1 is provided with an antibacterial agent on the core wrap sheet 53 that covers the outer surface of the absorbent core 40, and the fungus inside the absorbent core 40 that is the main cause of malodor is generated. Breeding can be effectively prevented. With the antibacterial function by such an antibacterial agent and the function of releasing malodorous components by the horizontal communication passage 6, it can be used in a sanitary and safe manner without worrying about the smell derived from excrement. Further, since the excrement is easily diffused in the lateral direction Y by the horizontal communication passage 6, an increase in the chance of contact between the excrement and the antibacterial agent contained in the core wrap sheet 53 is promoted, and the propagation of the bacteria is easily suppressed. Therefore, since the amount of malodorous components generated is easily suppressed, the malodor emitted to the outside of the napkin 1 is unlikely to become a level of concern.

  As shown in FIGS. 2 to 5, the absorbent core 40 in the present embodiment includes a standard absorbent portion 41 and a thick portion 42 that is thicker than the standard absorbent portion 41. It is preferable that the thick part 42 exists at least in the excretory part facing part B. In the present embodiment, the part from the front part A near the excretion part facing part B to the part near the excretion part facing part B in the rear part C. It is extended. The thick portion 42 has a hexagonal shape in plan view, and protrudes on the back sheet 3 side, that is, on the side opposite to the skin side of the wearer of the napkin 1. In this embodiment, the non-skin facing surface of the absorbent core 40 has irregularities as described above, whereas the skin facing surface of the absorbent core 40 is microscopically a fixing region 8 described later. Although it can be said that it has an unevenness due to the presence of a recessed portion or the like as a fixed portion, it macroscopically has no relatively large raised portion like the thick portion 42 and is flat. Thus, by having the thick part 42 on the non-skin facing surface side of the topsheet 2, as shown in FIG. 1, it is worn on the central portion in the lateral direction Y of the skin facing surface in the excretory part facing portion B. A raised portion 15 that protrudes toward the person's skin is formed.

The absorbent core 40 in the present embodiment is formed by partially varying the deposition amount (basis weight) of the forming material (fiber material, water-absorbing polymer, etc.) of the absorbent core 40. A portion having a relatively small amount is the standard absorbing portion 41, and a portion having a relatively large amount of deposition of the forming material is the thick portion 42. The thick portion 42 has not only a thickness but also a large basis weight as compared with the standard absorbent portion 41. The basis weight of the thick portion 42 is preferably 300 g / m ² or more, more preferably 350 g / m ² or more, and preferably 700 g / m ² or less, more preferably 650 g / m ² or less. The length in the longitudinal direction X of the thick portion 42 is preferably 30% or more, more preferably 35% or more, and preferably 70% or less, more preferably with respect to the total length of the absorbent core 40 in the longitudinal direction X. Is 65% or less. The maximum length of the thick portion 42 in the longitudinal direction X is preferably 100 mm or more, more preferably 110 mm or more, and preferably 150 mm or less, more preferably 140 mm or less.

  In the present embodiment, as shown in FIGS. 2 to 5, the convex lateral communication path 60 as the lateral communication path 6 is vertically adjacent to the thick part 42 on the non-skin facing surface of the absorbent core 40. A pair is arranged on each of the front side and the rear side in the direction X. And as shown in FIG.2 and FIG.3, in the level | step-difference part 43 resulting from the thickness difference of the standard absorption part 41 and the thick part 42, the non-skin side core which coat | covers the absorptive core 40 and its non-skin opposing surface A space S exists between the lap sheet 52 and the wrap sheet 52. As described above, the lateral communication path 6 crosses the non-skin facing surface in the lateral direction Y along the step portion 43 of the non-skin facing surface of the absorbent core 40, and the step portion 43 and the non-skin side core covering the step portion 43. Since the space S exists between the wrap sheet 52 and the space S having a relatively large volume including the space portion in the lateral communication passage 6, the absorption capacity of the excrement is relatively large and becomes a main source of malodor. Since it is formed along the easily thick portion 42, the space S functions as a malodorous component discharge path, and the malodorous component can be quickly released to the outside. In the present embodiment, each of the pair of convex lateral communication passages 60 and 60 has a V-shape convex outward in the longitudinal direction X in the plan view of the absorbent core 40 as shown in FIG. The top of the V-shape is located at the center in the lateral direction Y.

  Particularly, as shown in FIGS. 4 and 5, the thick portion 42 in the present embodiment exists over the entire length in the lateral direction Y of the absorbent core 40, that is, the lateral direction Y of the thick portion 42 (stepped portion 43). Since both end portions (both side edges along the longitudinal direction X of the thick portion 42) are in the same position in the lateral direction Y as that of the absorbent core 40, the space S functioning as a malodorous component discharge path is a relatively large space. The absorbent core 40 is traversed in the lateral direction Y along the stepped portion 43 with a capacity, and is excellent in the function of releasing malodorous components.

  Further, in the present embodiment, the lateral communication path 6 disposed along the stepped portion 43 has a convex shape toward the outside in the vertical direction X in a plan view as shown in FIG. Therefore, the space capacity of the space S is larger than when the horizontal communication path 6 arranged along the stepped portion 43 is linear in a plan view like the horizontal groove 61. For this reason, the malodorous component can be released to the outside more promptly in combination with the above-described effects of the thick portion 42 (stepped portion 43) existing over the entire length in the lateral direction Y of the absorbent core 40. Moreover, since it becomes easy to diffuse excrement not only to the horizontal direction Y but to the outer side of the vertical direction X, it becomes easy to contact the antibacterial agent of the core wrap sheet | seat 53 over the wide area of the absorber 4, and a malodorous component It is possible to increase the suppression of occurrence of

  In this embodiment, as shown in FIGS. 2, 4 and 5, the absorbent core 40 is provided with a vertical groove 7 extending outward in the vertical direction X from the convex horizontal communication path 60. It is distribute | arranged over the longitudinal direction end of the absorptive core 40 from the communicating path 60. FIG. The vertical grooves 7 have a straight line shape in plan view, and a plurality of vertical grooves 7 are arranged at predetermined intervals in the lateral direction Y in each of the front part A and the rear part C. The longitudinal groove 7 on the front part A side and the longitudinal groove 7 on the rear part C side are divided by a thick part 42 existing over the entire length in the lateral direction Y of the absorbent core 40.

  In the present embodiment, as shown in FIGS. 3, 4, and 5, the absorbent core 40 extends outward in the lateral direction Y from the longitudinal groove 7, separately from the convex lateral communication path 60. A plurality of horizontal grooves 61 as the horizontal communication passages 6 are arranged at predetermined intervals in the vertical direction X. The lateral grooves 61 are linear in a plan view, and a plurality of lateral grooves 61 are arranged at predetermined intervals in the longitudinal direction X in each of the front part A and the rear part C. For this reason, since the malodorous component and excrement diffuse through the absorbent core 40 in both the longitudinal direction X and the lateral direction Y by the cooperation of the longitudinal groove 7 and the lateral groove 61, the effect of suppressing troubles due to the malodorous component Can be further enhanced.

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

  The vertical groove 7 and the horizontal groove 61 intersect each other, more specifically, are orthogonal to each other. As a result, 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 41S by the longitudinal grooves 7 and the transverse grooves 61 that intersect each other, as shown in FIGS. Yes. On the non-skin facing surface of the standard absorbent portion 41, vertical grooves 7 and horizontal grooves 61 that are linear in plan view and standard small absorbent portions 41S that are rectangular in plan view are alternately present in the vertical direction X and the horizontal direction Y, respectively. ing. As described above, the standard absorbent portion 41 in the present embodiment includes the standard small absorbent portion 41S having a relatively high basis weight, and the vertical groove 7 and the lateral groove 61 that surround the standard small absorbent portion 41S and have a relatively low basis weight. It has a block structure having a large number of block regions consisting of 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 transverse direction Y, and as a result, the absorbent core 40 is the body of the wearer. It will be easy to follow the shape.

  As described above, in the napkin 1 of the present embodiment, the longitudinal groove 7 extends from the convex lateral communication path 60 to the longitudinal end of the absorbent core 40 on the non-skin facing surface of the absorbent core 40. Since the groove 7 functions as a malodorous component discharge path in the same manner as the convex lateral communication passage 60 or the space S in the vicinity thereof, the malodorous component derived from excrement is emitted from both the vertical direction X and the horizontal direction Y. It is possible to effectively prevent inconvenience due to the stench component staying between the napkin 1 and the skin of the wearer for a long time.

  In addition, the rear portion C is a portion corresponding to the wearer's buttocks when the napkin 1 is worn, and the standard absorbent portion 41 of the absorbent core 40 located in the rear portion C has the longitudinal grooves 7 and the lateral grooves 61. Flexible and excellent in body following ability. Therefore, the napkin 1 is excellent in the leakage prevention effect especially on the buttock side, and in combination with the antibacterial effect of the antibacterial agent arranged on the core wrap sheet 53, effectively suppresses skin troubles such as a wearer's fog. Can do.

  From the viewpoint of improving excreta absorption performance and antibacterial performance, the width 60W (see FIG. 4) of the convex lateral communication passage 60 is preferably longer than the width 61W (see FIG. 4) of the lateral groove 61. As described above, since the size relationship of width 60W> width 61W is established, the absorbent core 40 is easily bent in the vertical direction X particularly at the position where the convex lateral communication passage 60 is formed, and thus the napkin 1 is worn. A thick portion 42 sandwiched between the pair of convex lateral communication passages 60, 60 at a folding line (not shown) that crosses each of the pair of convex horizontal communication passages 60, 60 in the lateral direction Y. Is bent and deformed in the longitudinal direction X so as to protrude toward the wearer's skin, and the excretory part-facing part B fits the wearer's crotch part with good adhesion, so that excrement absorption performance can be improved. Further, when the napkin 1 is bent and deformed during wearing in this manner, the core wrap sheet 53 containing the antibacterial agent in the deformed napkin 1 is bent, and the bent portion of the sheet 53 and the vicinity thereof are Since the amount of the antibacterial agent per unit area is larger than that of the other parts of the sheet 53, the antibacterial agent has a high concentration region, so that the antibacterial efficiency can be improved. In particular, as in the present embodiment, the configuration in which the lateral communication path 6 (the convex lateral communication path 60) exists along the thick portion 42 (stepped portion 43) is a napkin based on the above-described magnitude relationship of width 60W> width 61W. 1 easily occurs, combined with the high body following ability of the rear part C, the antibacterial agent high-concentration region is easily formed in the rear part C, and as a result, an excellent antibacterial action can be expressed. The lateral groove 61 located around the stepped portion 43 also has a buffering action that suppresses excessive deformation in the lateral communication passage 6 portion arranged along the stepped portion 43. Due to the presence of the lateral groove 61, the inconvenience that the lateral communication path 6 disposed along the stepped portion 43 is crushed while the napkin 1 is worn is suppressed. In particular, as shown in FIG. 4, the horizontal communication path 6 arranged along the stepped portion 43 is a convex horizontal communication path 60, and the horizontal groove 61 positioned around the convex horizontal communication path 60 is in the horizontal direction. If it is formed along Y, this effect is easily exhibited.

  Such an improvement effect of the excrement absorption performance and antibacterial performance caused by the bending deformation of the napkin 1 is preferably expressed particularly in the excretion portion facing portion B where excretion concentrates. From this point of view, it is preferable that the lateral communication path 6 (60, 61) that can be a starting point of bending be arranged at the boundary between the excretory part facing part B and the front part A or the rear part C. In the present embodiment, as shown in FIG. 4, since the convex lateral communication passage 60 is arranged at the boundary between the excretory part facing part B and each of the front part A and the rear part C, in the excretion part facing part B The effect is particularly easily exhibited, and the excrement of the thick part 42 of the excretory part facing part B is outward in the lateral direction Y through the convex lateral communication passage 60 arranged along the thick part 42. Therefore, the absorption performance of the absorbent core 40 can be effectively utilized.

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

  From the same viewpoint, the interval 7G (see FIG. 4) between the longitudinal grooves 7 and 7 adjacent to each other in the lateral direction Y is preferably 5 mm or more, more preferably 7 mm or more, and preferably 15 mm or less, more preferably 12 mm or less. It is. An interval 61G (see FIG. 4) between the lateral grooves 61 adjacent to each other in the vertical direction X is preferably 10 mm or more, more preferably 15 mm or more, and preferably 30 mm or less, more preferably 25 mm or less.

  From the same viewpoint, with respect to the absorbent core 40, the basis weight of the horizontal communication passage 6 (the basis weight of the portion overlapping the horizontal communication passage 6 in plan view) is larger than the basis weight of the peripheral portion of the horizontal communication passage 6. And low. In this embodiment, the peripheral portion of the horizontal communication passage 6 here is a standard small absorption portion 41S adjacent to the convex horizontal communication passage 60 or the horizontal groove 61. As described above, since the magnitude relationship of the basis weight of the horizontal communication passage 6> the basis weight of the peripheral portion is established, the bending deformation of the napkin 1 described above is likely to occur, and in particular, the thick portion 42 of the excretory portion facing portion B. Becomes easier to protrude toward the skin side of the wearer. In addition, since the relatively low basis weight horizontal communication passage 6 can function as a temporary storage part of excrement, for example, when a large amount of excrement is excreted at a time when the napkin 1 is worn, While storing the excrement in the communication path 60, it is possible to diffuse the excrement to the surrounding standard small absorption part 41S, and the absorption performance of excrement can be further improved.

  In the standard absorbent portion 41, the ratio between the basis weight of the horizontal communication passage 6 (60, 61) and the basis weight of the standard small absorbent portion 41S which is the peripheral portion thereof is preferably as the former / the latter, assuming the former <the latter. Is 0.2 or more, more preferably 0.3 or more, and preferably 0.7 or less, more preferably 0.6 or less.
  The basis weight of the horizontal communication passage 6 (60, 61) is preferably 50 g / m.²Or more, more preferably 70 g / m²Above, and preferably 200 g / m²Or less, more preferably 150 g / m ²It is as follows. The basis weight of the vertical groove 7 can also be in the same range as that of the horizontal communication path 6.
  The basis weight of the standard small absorbent part 41S is preferably 200 g / m.²Or more, more preferably 220 g / m²Above, and preferably 350 g / m²Or less, more preferably 300 g / m²It is as follows.
  The basis weights of the horizontal communication path 6 (60, 61), the vertical groove 7, and the standard small absorption part 41S are measured by the following method.

<Measurement method of basis weight>
A single-edged blade made by Feather along the boundary line between the formation site (low basis weight portion) of the lateral communication passage 6 in the absorbent core 40 to be measured and the standard small absorption portion 41S (high basis weight portion) which is the peripheral portion thereof Cut with a razor. Each of the 10 pieces of the high basis weight part obtained by cutting was measured using an electronic balance (electronic balance GR-300 manufactured by A & D, accuracy: 4 digits after the decimal point). Find the average weight. The calculated average weight is divided by the average area per piece of the high basis weight portion to calculate the basis weight of the high basis weight portion, which is the basis weight of the standard small absorbent portion 41S.
Next, along the boundary line extending in the lateral direction Y of the napkin 1 among the boundary lines between the low basis weight part and the high basis weight part, the length is 100 mm, and the width is adjusted to the design dimension of the width of the low basis weight part. Using a single-edged razor manufactured by Feather, cut out five small pieces in the transverse direction Y of the thin striped low basis weight portion. Five pieces obtained are each measured using an electronic balance (Electronic balance GR-300, manufactured by A & D, accuracy: 4 digits after the decimal point), and averaged to obtain the average weight of one piece of the low basis weight part. A horizontal passage that extends in the lateral direction Y by calculating the basis weight in the lateral direction Y of the low basis weight portion by dividing the obtained average weight by the average area per piece in the lateral direction Y of the low basis weight portion The basis weight is 6. The basis weight is also calculated for the vertical groove 7 in the same manner as the horizontal communication path 6.

  As an example of a method for establishing the above-described relationship of “basis weight of horizontal communication passage 6> basis weight of peripheral portion (standard small absorbent portion 41 </ b> S)” in absorbent core 40 (standard absorbent portion 41), a fiber stacking apparatus is used. In the manufacturing method of the well-known absorptive core used, the method of making the amount of piles of the forming material of an absorptive core differ by the horizontal communicating path 6 and its peripheral part (standard small absorption part 41S) is mentioned. In a known method for manufacturing an absorbent core, typically, the absorbent core forming material supplied in an air stream is applied to the bottom of a stacking recess formed on the outer surface of a fiber stacking device (such as a rotating drum). In this process, the accumulation amount of the forming material can be partially varied by using a stacking recess having a partially different opening ratio at the bottom. Specifically, for example, the opening ratio of the bottom corresponding to the planned formation site of the horizontal communication passage 6 (the convex horizontal communication passage 60, the horizontal groove 61) is the formation planned site of the peripheral portion (standard small absorption portion 41S). By using a recess for accumulation in which the bottom of the former is adjusted so that the air flow can pass more easily than the bottom of the latter, the horizontal communication passage 6 is formed. The absorbent core 40 having the thin and low basis weight portion and the surrounding thick and high basis weight portion (standard small absorbent portion 41S) can be formed. Moreover, in order to obtain the magnitude relationship of the above-mentioned "basis weight of the horizontal continuous passage 6> basis weight of the peripheral part", for example, a method for manufacturing an absorbent core described in JP-A-2015-97716 may be used. .

  In addition, when the above-mentioned magnitude relationship is established, “basis weight of horizontal communication passage 6> basis weight of peripheral portion (standard small absorption portion 41S)”, the absorbent core at the arrangement position of horizontal communication passage 6 (60, 61). The density of 40 is the same as or lower than that in the peripheral part (standard small absorption part 41S). The present invention is not limited to the form in which such a magnitude relationship is established. For example, the density of the absorbent core 40 at the position where the lateral communication passage 6 is disposed may be higher than that in the peripheral portion. For example, the absorbent core 40 having such a relationship that “the density of the arrangement positions of the horizontal communication passages 6> the density of the peripheral portion (standard small absorbent portion 41S)” has a uniform basis weight and a surface (non-skin The surface of the absorbent core having no irregularities on the opposing surface) can be manufactured by applying a pressing process such as embossing. In such a manufacturing method, the part of the absorbent core 40 that has been subjected to the pressing process is Therefore, the lateral communication path 6 has a higher density than the peripheral part.

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

  The fixing area 8 in the present embodiment has a pair of vertical fixing areas 81 and 81 extending in the vertical direction X in the excretory part facing part B, and forward fixing in the front part A extending in the horizontal direction Y. It has the area | region 82, and has the back fixing area | region 83 extended in the horizontal direction Y in the back part C. FIG. The fixed regions 81, 82, and 83 are connected to each other at their end portions in the extending direction to form a fixed region 8 that is annular (ellipsoidal) in plan view. The pair of vertical fixing regions 81, 81 have both sides in the lateral direction Y of the thick portion 42 cut longitudinally in the vertical direction X, and the central portion in the lateral direction Y of the thick portion 42 is surrounded by the annular fixing region 8. Has been.

  In addition to the form which consists only of the said fixing | fixed part (Namely, the part to which the surface sheet 2 and the skin side core wrap sheet | seat 51 in the skin opposing surface of the absorptive core 40 were fixed) in the fixation area | region 8 (81, 82, 83). A form including other parts (that is, the non-fixed portion of the surface sheet 2 and the skin-side core wrap sheet 51 on the skin facing surface of the absorbent core 40) is included. In the fixed region 8 including both the fixed portion and the non-fixed portion, typically, a plurality of fixed portions are intermittently disposed (the interval between the fixed portions is preferably 3 mm or less), and between the adjacent fixed portions. The non-fixed portion is present in the fixed region 8 where the plurality of fixed portions exist in a certain unit. In the present invention, the shape and arrangement of the fixed region 8 in plan view are not limited to the illustrated form, and can be set similarly to what is called a leak-proof groove or the like in this type of absorbent article. The shape in plan view may be linear or a shape including a curve.

  The fixed portion in the fixed region 8 (81, 82, 83) exists at least in the non-arranged portion of the lateral communication path 6 (60, 61), that is, the standard small absorption portion 41S and the thick portion 42. In the fixing part, means for fixing the top sheet 2, the skin-side core wrap sheet 51, and the absorbent core 40 are not particularly limited, and known methods such as adhesive, fusion with heat, ultrasonic sealing, and the like are known. The fixing means can be used.

  In this embodiment, the said fixing | fixed part in the fixed area | region 8 (81, 82, 83) performs the pressing process (what is called embossing) with or without heat | fever from the skin opposing surface side of the absorptive main body 5. FIG. Is formed. Therefore, in the said fixing | fixed part, the surface sheet 2 and the absorber 4 (skin side core wrap sheet | seat 51 and the absorptive core 40) are recessed integrally. That is, the fixed portion of the fixed region 8 in the present embodiment is a recessed portion. The recessed depth of the fixing portion may be constant over the entire length in the extending direction or may be partially different.

  In the present embodiment having the above-described configuration, the top sheet 2 and the absorbent core 40 are connected in the fixed region 8 (that is, the pair of vertical fixed regions 81, 81) located on both sides in the lateral direction Y of the napkin 1. Since it is being fixed to the absorptive core 40 in the state which clamped the skin side core wrap sheet | seat 51 in the non-arrangement | positioning part of the channel | path 6 (60, 61), the bending deformation | transformation (thickness part 42 of the thick part 42) mentioned above is carried out. When the wearer deforms to the skin side of the wearer), the skin-side core wrap sheet 51 is excessively deformed along with the deformation, generating wrinkles and the like, resulting in an uncomfortable feeling when worn. Can be prevented.

  From the viewpoint of more reliably preventing the excessive deformation of the skin-side core wrap sheet 51, the top sheet 2 and the skin-side core wrap sheet 51 are arranged laterally in the fixing region 8 (vertical fixing region 81). It is preferable that not only the non-arranged portion of the communication path 6 (60, 61) but also the horizontal communication path 6 is fixed to the absorbent core 40.

  On the other hand, the top sheet 2 and the skin-side core wrap sheet 51 are fixed to the absorbent core 40 only at the non-arranged portion of the horizontal communication path 6 (60, 61) in the fixing region 8 (vertical fixing region 81). If the communication path 6 is not fixed, the vertical fixing region 81 includes a relatively hard fixing portion and a relatively flexible non-fixing portion. Therefore, a portion sandwiched between the pair of vertical fixing regions 81 and 81 (excretion The touch of the part facing part B in the lateral direction Y) can be good. In particular, the top sheet 2 and the skin-side core wrap sheet 51 are fixed to the absorbent core 40 before and after the longitudinal direction X of the convex lateral communication path 60 in the fixing region 8 (vertical fixing region 81). If the communication path 60 is not fixed, the above-described bending deformation of the napkin 1 (protruding deformation of the thick portion 42 toward the wearer's skin) is promoted, so that the fit of the napkin 1 and the absorption performance of excreta It leads to improvement.

  In the napkin 1 of the present embodiment, in the fixing portion of the fixing region 8 (vertical fixing region 81), the top sheet 2, the skin-side core wrap sheet 51, and the absorbent core 40 have their skin facing surface side and non-skin It is the state squeezed from both sides of the opposite surface. Therefore, in the napkin 1 of the present embodiment, as shown in FIGS. 2 and 3, these members 2, 51, and 5 are provided on the fixing portion of the fixing region 8 (vertical fixing region 81) on the skin facing surface of the napkin 1. A skin-side recessed portion in which 40 is integrally recessed is formed, and in a position overlapping the skin-side recessed portion in the thickness direction on the non-skin facing surface (the surface facing the back sheet 3) of the absorbent core 40, A non-skin-side recessed portion 9 in which the non-skin-side core wrap sheet 52 and the absorbent core 40 are integrally recessed is formed. The non-skin-side recessed part 9 has the same planar view shape as the skin-side recessed part as the fixing part of the fixing region 8. The non-skin-side recessed portion 9 typically absorbs with pressing when the skin-side recessed portion 9 is formed on the skin-facing surface of the napkin 1 according to a conventional method by pressing such as embossing. The non-skin-side recessed part 9 formed on the non-skin facing surface of the body 4 and thus formed substantially coincides with the skin-side recessed part in a plan view of the absorbent body 4.

  As described above, the absorbent body 4 (absorbent core 40) in which the skin-side recessed portion and the non-skin-side recessed portion 9 are formed has a high-density portion sandwiched between the both recessed portions. This high-density portion has a planar view line shape corresponding to the both concave recessed portions in the plan view line shape. When such a high-density portion exists in the absorbent core 40, excrement that moves outward in the lateral direction Y through the lateral communication path 6 (60, 61) of the absorbent core 40 is transferred to the high-density portion. Therefore, it is possible to effectively prevent so-called side leakage in which excrement leaks from the outside in the lateral direction Y. Moreover, in the said high density part, since the skin side core wrap sheet | seat 51 and the non-skin side core wrap sheet | seat 52 containing an antibacterial agent are adjoining in the thickness direction, the quantity of the antibacterial agent per unit area is other than that. Therefore, the antibacterial action can be efficiently expressed against a large amount of excreta in the absorbent core 40 around the high-density portion.

  In the napkin 1 of the present embodiment, as described above, as shown in FIGS. 1 and 2, a pair of side leak-proof sheets 13 and 13 are provided on the skin facing surface side of each of both ends in the lateral direction Y of the top sheet 2. The inner end portion 13a that is relatively close to the lateral center line CLy of the napkin 1 among the both ends in the lateral direction Y of each side leakage prevention sheet 13 overlaps with the lateral end portion Y of the absorbent body 4, And it is not fixed to the top sheet 2. As described above, the bending deformation of the napkin 1 (the protruding deformation of the thick portion 42 toward the wearer's skin) can improve the fit of the napkin 1, the absorption performance of excrement, the antibacterial action by the antibacterial agent, and the like. On the other hand, when the horizontal communication passage 6 (60, 61) is deformed so as to be crushed along with such deformation, a relatively highly viscous excrement such as menstrual blood from the excretory part facing part B (thick part 42). However, as described above, the inner end portion 13a of the side leak-proof sheet 13 overlaps the end portion of the absorbent body 4 in the lateral direction Y and is not fixed to the topsheet 2. The inner end 13a of the side leak-proof sheet 13 covers the open end in the extending direction of the lateral communication passage 6 (60, 61) at the end in the lateral direction Y of the absorbent body 4. Such concerns are dispelled.

  FIG. 6 shows another embodiment of the absorbent article of the present invention. Regarding other embodiments to be described later, constituent parts different from the napkin 1 of the above-described embodiment will be mainly described, and the same constituent parts will be denoted by the same reference numerals and description thereof will be omitted. The description about the napkin 1 of the said embodiment is applied suitably to the component which is not demonstrated especially.

  The napkin 1A shown in FIG. 6 extends outward in the lateral direction Y from the absorbent main body 5 having a shape that is long in the vertical direction X and both side portions along the vertical direction X of the excretory part-facing portion B of the absorbent main body 5. And a pair of rear flaps 12 and 12 extending outward in the lateral direction Y from both side portions along the longitudinal direction X of the rear portion C in the absorbent main body 5. The napkin is preferably used for so-called night use. The night napkin is assumed to be used at bedtime, and the total length is preferably 30 cm or more. The rear flap portion 12 extends on the side portion along the longitudinal direction X of the absorbent main body 5 by the side flap portion 10 projecting greatly outward in the lateral direction Y at the rear portion C. The rear flap portion 12 is not folded when fixing it to the clothes, and is formed on the non-skin facing surface in a state where the non-skin facing surface is spread, that is, extended to the side of the absorbent main body 5. It is fixed to the skin facing surface, that is, the inner surface of the clothing, through the rear adhesive portion (not shown).

The napkin 1A includes a horizontal through-hole 62 having openings on both the skin-facing surface and the non-skin-facing surface of the absorbent core 40 as a lateral communication passage 6 that crosses the absorbent core 40 in the lateral direction Y. In this respect, it differs greatly from the napkin 1 described above. The lateral through-hole 62 literally penetrates the absorbent core 40 in the thickness direction, and the portion where the forming material of the absorbent core 40 is not substantially present (the basis weight of the forming material of the absorbent core 40 is 30 g). / M ² or less). The lateral through-hole 62 in the napkin 1A is disposed adjacent to the thick portion 42 and is located outside the vertical direction X in plan view, like the convex lateral communication passage 60 disposed on the front side of the thick portion 42. A convex V-shape is formed toward the direction, and the top of the V-shape is located at the center in the lateral direction Y. The effect similar to that of the napkin 1 can be achieved by the napkin 1A.

  Hereinafter, the antibacterial agent contained in the core wrap sheet in the present invention will be described. As the antibacterial agent, an organic antibacterial agent is preferably used. The organic antibacterial agent can be expected to have high antibacterial / deodorant properties because of its good affinity with the odor-causing substance when the odor-causing substance in the excreta is organic. From the viewpoint of affinity with organic odor-causing substances and bacteria, organic cationic antibacterial agents are particularly preferred. Cationic antibacterial agents can suppress the generation of strong rot odor as a control of malodor production. The “organic antibacterial agent” refers to an antibacterial agent containing a component mainly composed of an organic compound.

  As the cationic antibacterial agent, those having the above-mentioned antibacterial action can be used without particular limitation. Examples thereof include those described in paragraphs [0015] to [0018] of the specification of JP-A-8-99841. These cationic antibacterial agents may be used alone or in combination of two or more. The cationic antibacterial agent is an organic compound type antibacterial agent, and is more leached into excrement such as urine than the metal ion type such as silver, zinc and copper, and has a wide antibacterial action. In particular, quaternary ammonium salts such as didecyldimethylammonium salt, alkylpyridinium salt, benzethonium salt, benzalkonium salt, monoalkyltrimethylammonium salt, dialkyldimethylammonium salt, and the like, and at least one selected from the group consisting of these are included. Preferably it contains seeds. These cationic antibacterial agents may be used individually by 1 type, and may be used in combination of 2 or more type.

  The content (basis weight) of the antibacterial agent in the core wrap sheet can be appropriately determined according to the type of the antibacterial agent, but is preferably 0.03 g / m.²Or more, more preferably 0.05 g / m²Above, and preferably 0.25 g / m²Or less, more preferably 0.20 g / m ²It is as follows. 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 described above. When a cationic antibacterial agent is used, the content basis weight can be measured by the following method. When a commercially available product or the like is used for analysis, each member is peeled off using a dryer or a cold spray to obtain a core wrap sheet to be measured. Thereafter, the basis weight of the cationic antibacterial agent in the core wrap sheet is measured with a liquid chromatograph / mass spectrometer (6140 LC / MS manufactured by Agilent Technologies, ionization method: ESI). Alternatively, the content of the cationic antibacterial agent can also be measured based on a calibration curve created by a calibration curve method.

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

  In the formula (1), R¹And R²Represents the same or different methyl group, ethyl group, or a linear or branched alkyl group or alkenyl group having 8 to 20 carbon atoms. X ⁻Represents a monovalent anion.

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

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

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

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

A preferable combination of R ³ and R ^{4 includes} a combination in which R ³ is a hydrogen atom and R ⁴ is a linear or branched alkyl group having 8 to 20 carbon atoms. More preferably, the alkyl group has 10 to 18 carbon atoms. By adding the benzalkonium salt having an anion active group represented by the formula (2) to the core wrap sheet, in addition to improving antibacterial and deodorizing performance, the texture of the core wrap sheet (bulkyness, flexibility) Can be improved.

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

  In the present invention, examples of other antibacterial agents contained in the core wrap sheet include porous particles. The porous particle in the present invention refers to a particle having a large number of pores at least on the particle surface and capable of collecting, adsorbing and / or incorporating a volatilizing odor component into the pores. The porous particles may be used alone as an antibacterial agent, or may be used in combination with the aforementioned cationic antibacterial agent.

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

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

From the viewpoint of more effectively expressing antibacterial / deodorant performance, the porous particles used in the present invention preferably have a BET specific surface area of 50 m ² / g or more, and 100 m ² / g or more. More preferably, it is more preferably 200 m ² / g or more. Further, the upper limit of the BET specific surface area is not particularly limited, but it is practical to set it to 2000 m ² / g or less. In addition, since the deodorizing performance becomes higher as the value of the BET specific surface area of the porous particles is larger, it is preferable that the value of the BET specific surface area is larger within the above-mentioned range. The BET specific surface area can be measured by a multi-point method using liquid nitrogen using a specific surface area / pore distribution measuring device “ASAP2020” manufactured by Shimadzu Corporation, and the value can be derived within a range in which the parameter C is positive. . Moreover, the mercury intrusion method can be used for the measurement of the pore distribution.

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

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

As specific examples of the porous particles, when using the above-mentioned activated carbon, aluminosilicate compound, and vinylpyridine copolymer, the BET specific surface areas are about 1750 m ² / g, about 250 m ² / g, and 350 m ² /, respectively. g having an average pore diameter of about 4.5 nm, about 20 nm, and about 10 nm can be used.

  The odor component derived from excrement such as urine and menstrual blood, which is the target of antibacterial / deodorization, is a mixture of a plurality of components such as ammonia, amines, fatty acids, hydrogen sulfide and mercaptans. Generally, since the molecular size of these odor components is 1 nm or more, the use of porous particles having an average pore diameter of 2 nm or more as a deodorant can effectively adsorb a plurality of odor components. it can.

  In particular, when using porous particles satisfying any one of the above-mentioned suitable numerical ranges of the BET specific surface area or the average pore diameter, the content of the porous particles can be reduced while maintaining high antibacterial / deodorant performance. Is preferable. Furthermore, when porous particles satisfying the suitable numerical ranges of both the BET specific surface area and the average pore diameter are used, the antibacterial / deodorant performance can be further improved and the content of the porous particles can be further reduced. More preferable. This combined with the reduction in the content of porous particles by the combination with the cationic antibacterial agent described above, sustained and effective antibacterial action and deodorizing action, and improved texture of the core wrap sheet And an improvement in wearing feeling when incorporated in an absorbent article.

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

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

As mentioned above, although this invention was demonstrated based on the preferable embodiment, the absorbent article of this invention is not restrict | limited to the said embodiment at all, and can be changed suitably.
For example, in the said embodiment, although the thick part 42 protruded to the back surface sheet 3 side, you may protrude to the surface sheet 2 side contrary to this.
In addition, from the viewpoint of improving absorbability, leakproofness, etc., paper and various non-woven fabrics, which are also called second sheets, sublayer sheets, etc., between the top sheet 2 and the absorbent body 4 (skin-side core wrap sheet 51). A liquid permeable sheet may be interposed.
The absorbent article of the present invention may be a sanitary napkin as shown in the drawing, a panty liner (clay sheet), or the like.
All the parts of only the one embodiment described above can be used together as appropriate.

1 Sanitary napkin (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 40 Absorbent core 41 Standard absorbent part 41S Standard small absorbent part 42 Thick part 43 Step part 51 Skin side core wrap sheet 52 Non-skin side core wrap sheet 53 Core wrap sheet S Space 5 Absorption Main body 6 Horizontal communication passage 60 Convex-shaped horizontal communication passage 61 Horizontal groove 62 Horizontal through-hole 7 Vertical groove 8 Fixed region (skin-side recessed portion)
81 Vertical fixing area 82 Front horizontal fixing area 83 Rear horizontal fixing area 9 Non-skin-side recessed part (fixing part)
13 Side leakproof sheet 13a Inner end (free end) of side leakproof sheet
13b Outer side end A of front side leakage prevention sheet A Front part B Excretion part facing part C Rear part

Claims (8)

An excretory part facing part including an excretion spot part, which has a longitudinal direction corresponding to the wearer's front-rear direction and a lateral direction orthogonal to the longitudinal direction, and is disposed to face the excretion part of the wearer in the longitudinal direction; A front sheet that is divided into a front part disposed on the abdomen side of the wearer than the facing part and a rear part disposed on the back side of the wearer than the excretion part facing part, and forms a skin facing surface; An absorbent article comprising a back sheet forming a non-skin facing surface and an absorbent body positioned between the two sheets,
The absorbent body includes a liquid-retaining absorbent core and a core wrap sheet that covers the skin facing surface and the non-skin facing surface of the absorbent core, and the core wrap sheet contains an antibacterial agent. And
The absorbent core has a lateral communication passage extending in a lateral direction having an opening in at least one of a skin facing surface and a non-skin facing surface of the absorbent core, from one end to the other end in the lateral direction of the absorbent core. Are arranged continuously ,
The absorbent core has a standard absorbent part and a thick part having a thickness larger than that of the standard absorbent part, and the lateral communication passage is disposed adjacent to the thick part,
An absorbent article in which a space exists between the absorbent core and the core wrap sheet in a step portion resulting from a thickness difference between the standard absorbent portion and the thick portion . The absorptive article according to claim 1 in which said thick part exists over the full length of the transverse direction of said absorptive core. The absorbent article according to claim 1 or 2 , wherein at least a part of the lateral communication passage disposed in the absorbent core is a lateral communication passage having a convex shape outward in the longitudinal direction in a plan view. Said absorbent core, said convex longitudinal groove extending longitudinally outward from the lateral communication passage shape, claim Side communicating passage is disposed across the longitudinal end of the absorbent core of the convex shape 3 Absorbent article as described in 1. Aside from the convex lateral communication passage, a plurality of lateral grooves as the lateral communication passage extending laterally outward from the longitudinal groove are arranged in the absorbent core at predetermined intervals in the vertical direction. And
The absorbent article according to claim 4 , wherein a width of the convex lateral communication passage is longer than a width of the lateral groove . The absorptivity according to any one of claims 1 to 5 , wherein the density of the absorbent core at the arrangement position of the horizontal communication passage is higher than the density of the absorbent core in the peripheral portion of the horizontal communication passage. Goods. The horizontal communication path in which a fixing region including a fixing portion in which the top sheet and the core wrap sheet are fixed integrally with each other on the skin-facing surface of the absorbent core is positioned in the horizontal communication path and the longitudinal direction thereof Extending over the non-arranged part of the
In the fixing region, the top sheet and the core wrap sheet are fixed to the absorbent core at a non-arranged portion of the lateral communication path, and the fixing portion is formed .
In the fixing unit, the topsheet, the core wrap sheet and the absorbent core, any one of claims 1-6 is their skin-facing side and a state of being pressed from both non-skin facing side 1 Absorbent article according to item. With respect to the absorbent core, the basis weight of the lateral communication passage is rather low compared to the basis weight of the peripheral portion of the lateral communication passage,
The absorbent article according to any one of claims 1 to 7 , wherein the lateral communication passage has openings on both the skin facing surface and the non-skin facing surface of the absorbent core .

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