JP2021186080A - Absorbent article - Google Patents

Abstract

To provide an absorbent article capable of suppressing odor of urine and accurately confirming a place urine leakage has occurred and the color of the urine.SOLUTION: An absorbent article 1 includes a surface sheet 2, an absorber 4, and a pair of activated carbon sheets 6. The pair of activated carbon sheets 6 continuously extend from one edge 4T1 to the other edge 4T2 in a longitudinal direction L of the absorber 4 in a planar view and are arranged on both sides in a width direction W with a longitudinal direction center line CL in between. The absorbent article has: a central non-containing area MNA which, in a planar view, continuously extends from one edge to the other edge in the longitudinal direction of the absorber inside in the width direction of the pair of activated carbon sheets; and an end non-containing area ENA which, in a planar view, is positioned at both ends in the width direction of the absorber and does not contain the activated carbon sheets outside in the width direction of the pair of activated carbon sheets.SELECTED DRAWING: Figure 1

Description

The present invention relates to an absorbent article.

Absorbent articles containing a deodorant for suppressing the odor of urine are known. For example, Patent Document 1 discloses an absorbent article comprising a deodorant. This absorbent article includes an absorbent sheet containing tea leaves and having antibacterial and deodorizing performance in order to suppress the growth of germs and the generation of a strong ammonia odor after urination.

In this absorbent article, when the absorbent article is viewed from the surface sheet side, the colored region of the absorbent sheet containing tea leaves is arranged in a frame shape surrounding the white region of the absorber. As a result, the colored region formed by the absorbent sheet is visually recognized like a window frame through the surface sheet, and the white region formed by the absorber is visually recognized in the center of the plane of the colored region. Therefore, after urinating, it is possible to confirm the health condition of the user of the absorbent article by observing the color of the urine that has soaked (absorbed) into the white region.

Japanese Unexamined Patent Publication No. 2016-146986

When the user of the absorbent article excretes urine, if the absorbent article is not attached in an appropriate position, a situation in which the excreted urine leaks to the outside of the absorber, that is, urine leakage may occur. The main locations where urine leakage is likely to occur include both widthwise and longitudinal ends of the absorber. By confirming the location of the incontinence, the user or the caregiver grasps the state of wearing the absorbent article, identifies the cause of the incontinence, and helps to suppress the recurrence of the incontinence. In addition, by checking the color of urine at that time, the health condition of the user is grasped.

Since the absorbent article of Patent Document 1 includes an absorbent sheet containing a deodorant containing tea leaves, the odor of urine can be suppressed. However, in this absorbent article, the colored region of the absorbent sheet is arranged so as to surround the white region of the absorber in a frame shape. Therefore, both ends of the absorber in the width direction and the longitudinal direction in which urine leakage is likely to occur are covered with colored regions, making it difficult to see urine. Therefore, it may be difficult for the user or the caregiver to accurately confirm the place where the urine leak has occurred. In that case, it becomes difficult for the user or the caregiver to properly grasp the state of wearing the absorbent article, and it becomes difficult to identify the cause of urine leakage. Further, since the tea husk is close to the color of urine, it may be difficult to accurately confirm the color of urine, for example, the color of urine on the tea husk may be mistaken for the original color of urine. In that case, it becomes difficult for the user or the caregiver to properly grasp the health condition of the user.

An object of the present invention is to provide an absorbent article capable of suppressing the odor of urine and accurately confirming the place where urine leaks and the color of urine.

The absorbent article of the present invention has a longitudinal direction, a width direction, and a thickness direction, and has a surface sheet, an absorber arranged on the non-skin side of the surface sheet, and the surface sheet and the absorber. An absorbent article comprising an activated carbon member disposed between and containing particles of activated carbon, wherein the activated carbon member is, in plan view, from one edge of the absorber in the longitudinal direction to the other edge. Containing a pair of activated carbon sheets that extend continuously and line up on both sides of the widthwise side across a longitudinal centerline, the absorbent article is, in plan view, inside the widthwise side of the pair of activated carbon sheets. A central non-containing region extending continuously from one edge of the absorber in the longitudinal direction to the other edge and not containing the activated carbon sheet, and outside the pair of activated carbon sheets in the width direction in plan view. , An absorbent article located at both ends of the absorber in the width direction and having end-free regions that do not contain an activated carbon sheet.

According to the present invention, it is possible to provide an absorbent article capable of suppressing the odor of urine and accurately confirming the place where urine leaks and the color of urine.

It is a top view of the structural example of the absorbent article which concerns on embodiment. FIG. 2 is a cross-sectional view taken along the line II-II of the absorbent article of FIG. FIG. 3 is a cross-sectional view taken along line III-III of the absorbent article of FIG. It is a top view which shows the structural example of the absorber of the absorbent article of FIG. 1 and the activated carbon sheet.

The present embodiment relates to the following aspects.
[Aspect 1]
Particles of activated carbon having a longitudinal direction, a width direction, and a thickness direction, which are arranged between a surface sheet, an absorber arranged on the non-skin side of the surface sheet, and the surface sheet and the absorber. An absorbent article comprising an activated carbon member comprising, wherein the activated carbon member extends continuously from one edge of the absorber in the longitudinal direction to the other edge in a plan view and is centered in the longitudinal direction. The absorbent article comprises a pair of activated carbon sheets lined up on both sides of the width direction across a line, the absorbent article being, in plan view, inside the width direction of the pair of activated carbon sheets and in the longitudinal direction of the absorber. A central non-containing region extending continuously from one edge to the other edge and not containing the activated carbon sheet, and outside the width direction of the pair of activated carbon sheets in a plan view, the width direction of the absorber. An absorbent article that is located at both ends of the cell and has an end-free area that does not contain an activated carbon sheet.

The absorbent article is provided with a pair of activated carbon sheets arranged on both sides in the width direction across the longitudinal center line on the skin side of the absorber. Therefore, it is possible to absorb and suppress the odor of urine of the surface sheet or the absorber. At that time, the absorbent article does not contain the activated carbon sheet at the inside and outside of the pair of activated carbon sheets in the width direction, that is, at the positions corresponding to the central portion and both ends of the absorber in a plan view, respectively. It has a contained region and an end-free region. Therefore, first, there is no activated carbon sheet in the central part of the absorber, which is the region where urine is mainly excreted. Thereby, the color of the urine absorbed in the central part of the absorber can be confirmed accurately.
Furthermore, there are no activated carbon sheets at both ends of the absorber in the longitudinal and width directions where urine leakage can occur. Thereby, whether or not the urine has diffused to both ends in the longitudinal direction and the width direction, that is, whether or not the urine leak has occurred, and the position of the urine leak can be easily confirmed by the presence or absence of the color of the urine. At that time, since activated carbon particles are used as the deodorant instead of tea leaves, the region where the activated carbon particles are present is blackish, so the color of urine in that region can be easily distinguished from the actual color of urine. It is possible to prevent the color of urine in the area from being mistaken for actual urine.
As described above, in this absorbent article, the odor of urine is suppressed, and the user or the caregiver can accurately confirm the place where the urine leak occurs. Thereby, it is possible to grasp the wearing state of the absorbent article, identify the cause of urine leakage, and use it for suppressing the recurrence of urine leakage. In addition, the color of urine at that time can be confirmed accurately, and the health condition of the user can be easily grasped. Therefore, it is possible to achieve both suppression of the odor of urine and accurate confirmation of the place where the urine leak occurs and the color of the urine.

[Aspect 2]
The absorber according to aspect 1, wherein the absorber includes an upper layer absorber and a lower layer absorber which is located on the non-skin side of the upper layer absorber and whose entire surface on the skin side is covered with the upper layer absorber. Absorbent goods.
In the present absorbent article, the absorber includes an upper layer absorber and a lower layer absorber located on the non-skin side of the upper layer absorber. The entire surface of the lower layer absorber on the skin side is covered with the upper layer absorber. Thereby, the upper layer absorber can block or suppress the diffusion of the urine odor generated from the lower layer absorber toward the skin side. Therefore, the odor of urine present in the absorber can be suppressed.

[Aspect 3]
The upper layer absorber and the lower layer absorber both contain a highly water-absorbent polymer and a pulp fiber, and the ratio of the mass of the pulp fiber to the total mass of the highly water-absorbent polymer and the pulp fiber is taken as the pulp fiber ratio. The absorbent article according to aspect 2, wherein the pulp fiber ratio of the upper layer absorber is higher than the pulp fiber ratio of the lower layer absorber.
In this absorbent article, since the pulp fiber ratio of the upper layer absorber is relatively high, urine can be widely diffused in the upper layer absorber in the plane direction (longitudinal direction and / or width direction). Therefore, the activated carbon sheet can be widely and effectively used, and the odor of urine can be efficiently suppressed by the activated carbon sheet.

[Aspect 4]
The absorbent article according to aspect 2 or 3, wherein in the central non-containing region, the upper layer absorber and the lower layer absorber have slits extending along the longitudinal direction and recessing in the thickness direction.
In the present absorbent article, in the central non-containing region, that is, in the region where the activated carbon sheet does not exist, the upper layer absorber and the lower layer absorber have slits extending in the longitudinal direction and recessed in the thickness direction. Therefore, the excreted urine is mainly guided to the slit, quickly reaches the upper and lower absorbers through the slit, and can be quickly absorbed and diffused by the upper and lower absorbers. Therefore, the pair of activated carbon sheets located on the skin side of the upper layer absorber and the lower layer absorber can block or suppress the odor of urine generated from the upper layer absorber and the lower layer absorber. Therefore, the odor of urine present in the absorber can be suppressed.

[Aspect 5]
A pair of leak-proof walls extending along the longitudinal direction and arranged at predetermined intervals in the width direction are further provided on both sides of the surface sheet in the width direction, and each of the pair of leak-proof walls is provided. The outer edge in the width direction is a fixed end fixed to the surface sheet, the inner edge in the width direction is a free end, and the fixed end is the fixed end in each of the pair of activated carbon sheets. The absorbent article according to any one of aspects 1 to 4, which is arranged outside the width direction with respect to the outer edge in the width direction.
In this absorbent article, the fixed end of the leak-proof wall is located outside the width direction of the activated carbon sheet with respect to the outside edge in the width direction. That is, in the width direction, the activated carbon sheet is not arranged outside the position where the leak-proof wall blocks urine, but is arranged in the region where urine is mainly present. Therefore, the activated carbon sheet can be widely and effectively used, and the odor of urine can be efficiently suppressed by the activated carbon sheet.

[Aspect 6]
It has a pair of fold lines extending along the longitudinal direction and provided at intervals in the width direction for folding the absorbent article in the width direction, and the pair of fold lines in the width direction. The absorbent article according to any one of aspects 1 to 5, wherein each of the above-mentioned is overlapped with each of the pair of activated carbon sheets.
The absorbent article is folded in three in the width direction along a pair of fold lines. Here, if each of the pair of fold lines is located inside each of the pair of activated carbon sheets, when the absorbent article is folded, each of the folded pair of activated carbon sheets in the absorbent article is centered. It will overlap the non-containing region in the thickness direction via the surface sheet. In that case, if the activated carbon particles of the activated carbon sheet fall off, they may adhere to the central non-containing region via the surface sheet, making it difficult to confirm the color of urine in the central non-containing region. Therefore, in this absorbent article, each of the pair of fold lines overlaps with each of the pair of activated carbon sheets. Therefore, in each of the pair of folded activated carbon sheets in the absorbent article, the region overlapping the central non-containing region in the thickness direction can be reduced. Thereby, it is possible to prevent the particles of the activated carbon of the activated carbon sheet from adhering to the surface sheet of the central non-containing region and making it difficult to confirm the color of urine in the central non-containing region.

[Aspect 7]
The absorbent article according to aspect 6, wherein each of the pair of fold lines is located outside the center of each of the pair of activated carbon sheets in the width direction.
In this absorbent article, each of the pair of fold lines is located outside the center of each of the pair of activated carbon sheets. Therefore, in each of the pair of folded activated carbon sheets in the absorbent article, it is possible to eliminate the region overlapping in the thickness direction with the central non-containing region. Therefore, it is possible to surely prevent the particles of activated carbon from adhering to the central non-containing region and making it difficult to confirm the color of urine on the surface sheet of the central non-containing region.

[Aspect 8]
A pair of leak-proof walls extending along the longitudinal direction and arranged at predetermined intervals in the width direction are further provided on both sides of the surface sheet in the width direction, and each of the pair of leak-proof walls is provided. The absorbent article according to aspect 6 or 7, wherein the absorbent article overlaps with at least a part of each of the pair of activated carbon sheets in the thickness direction.
In this absorbent article, in plan view, each of the pair of leakproof walls covers at least a portion of each of the pair of activated carbon sheets (via the surface sheet). Therefore, when the absorbent article is folded, a pair of leak-proof walls are provided between each of the pair of activated carbon sheets in the folded portion of the absorbent article and the central non-containing region where the portion is folded. Can be intervened. Thereby, it is possible to prevent the particles of the activated carbon of the activated carbon sheet from adhering to the surface sheet of the central non-containing region and making it difficult to confirm the color of urine in the central non-containing region.

[Aspect 9]
The absorbent article according to any one of aspects 1 to 8, wherein the particles of at least 90% by volume of the particles of the activated carbon have a particle size of 1 μm or more and 60 μm or less.
In this absorbent article, at least 90% by volume of the particles of activated carbon have a particle size of 1 μm or more and 60 μm or less. In this way, by making most of the particles of the activated carbon having a particle size of 60 μm or less, it can be easily penetrated between the constituent fibers of the sheet body of the activated carbon sheet, whereby it can be easily supported on the sheet body. Can be done. Further, by setting the particle size of most of the particles of the activated carbon to 1 μm or more, even if some of the particles of the activated carbon fall off from the sheet body, the dropped particles can hardly pass through the surface sheet. As a result, it is possible to prevent particles of activated carbon from adhering to the central non-containing region and making it difficult to confirm the color of urine in the central non-containing region.

[Aspect 10]
The absorbent article according to any one of aspects 1 to 9, further comprising a superabsorbent polymer sheet containing a superabsorbent polymer between the pair of activated carbon sheets and the surface sheet.
The absorbent article further comprises a superabsorbent polymer sheet (SAP sheet) between the pair of activated carbon sheets and the surface sheet. Thereby, when the SAP sheet absorbs urine and swells, the odor of urine generated from the absorber located on the non-skin side of the SAP sheet can be blocked or suppressed by the swollen SAP sheet. Therefore, the odor of urine present in the absorber can be suppressed.

[Aspect 11]
The absorbent article according to any one of aspects 1 to 10, further comprising a diffusion sheet between the pair of activated carbon sheets and the surface sheet.
The absorbent article further comprises a diffusion sheet between the pair of activated carbon sheets and the surface sheet that diffuses urine widely in the plane direction. Since this diffusion sheet covers the activated carbon sheet from the skin side, even if some of the particles of the activated carbon fall off from the sheet body of the activated carbon sheet, it is possible to block or suppress the fallen particles from reaching the surface sheet. Therefore, it is possible to prevent particles of activated carbon from adhering to the central non-containing region and making it difficult to confirm the color of urine in the central non-containing region.

Hereinafter, the absorbent article according to the embodiment will be described. However, in the embodiment, the urine absorbing pad will be described as an example of an absorbent article. The type of the absorbent article is not limited to this example, and other absorbent articles may be used as long as they do not deviate from the scope of the present invention. Other absorbent articles include tape-type diapers, pants-type diapers, sanitary napkins, incontinence pads, and the like.

1 to 4 show a configuration example of the absorbent article 1 according to the embodiment. However, FIG. 1 is a plan view of the absorbent article 1, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III of FIG. , FIG. 4 is a plan view showing a configuration example of the absorber 4 of the absorbent article 1 of FIG. 1 and the pair of activated carbon sheets 6. The absorbent article 1 has a longitudinal direction L, a width direction W and a thickness direction T orthogonal to each other, and has a longitudinal center line CL extending in the longitudinal direction L through the center of the width direction W and a longitudinal direction L. It has a widthwise centerline CW that passes through the center of the urination region STA (described later) and extends in the widthwise direction W. The directions and sides toward the center line CL in the longitudinal direction are the inward and inside of the width direction W, respectively, and the directions and sides away from it are the outward and outside of the width direction W, respectively. The direction and side toward the center line CW in the width direction are defined as the inward direction and the inside of the longitudinal direction L, respectively, and the direction and the side away from the center line CW are defined as the outward direction and the outside of the longitudinal direction L, respectively. The "skin side" and "non-skin side" mean the side relatively close to the wearer's skin surface and the side far from the wearer's skin surface in the thickness direction T when the absorbent article 1 is attached to the wearer, respectively. "Plane view" refers to viewing the absorbent article 1 unfolded in a plane including the longitudinal direction L and the width direction W from the upper side (skin side) of the thickness direction T, and "planar shape" means a plane. A shape that can be visually grasped. The "planar direction" is an arbitrary direction parallel to the plane including the width direction W and the longitudinal direction L. In FIG. 1, the upper side is the front side or the ventral side in the longitudinal direction L, and the lower side is the rear side or the dorsal side in the longitudinal direction L. These definitions are commonly used not only for the absorbent article 1 but also for each material arranged in the absorbent article 1. It should be noted that "a member, a structure, a shape, etc." is "along the longitudinal direction L" not only when the member or the like is parallel to the longitudinal direction L, but also when the component Dx in the longitudinal direction L of the member or the like is the width direction W of the member or the like. It also includes cases where it is larger than the component Dy of. Similarly, "along the width direction W" means that the member or the like is not only when the member or the like is parallel to the width direction W, but also when the component Dy in the width direction W of the member or the like is the component Dx in the longitudinal direction L of the member or the like. Including cases larger than. In the case of "along the longitudinal direction L" and "along the width direction W" for a curved or curved member, the components Dx and Dy at the tangential line of each point on the curved surface and the like are evaluated as described above. The end of a member or the like in a certain direction (example: L in the longitudinal direction, W in the width direction) is 1/4 (preferably 1) of the total length of the member or the like in that direction from the edge in that direction. / 8) Refers to the range of the following dimensions.

The absorbent article 1 has a ventral portion A1, a crotch portion A2 and a dorsal portion A3 arranged from the front side to the rear side along the longitudinal direction L, and the crotch portion A2 is in the width direction W in a plan view. It has a constricted gourd shape. However, the ventral portion A1 is a portion that abuts on the wearer's abdomen, the crotch portion A2 is a portion that abuts on the wearer's crotch portion, and the dorsal portion A3 is a portion that abuts on the wearer's buttocks and back. Is. However, the shape of the absorbent article 1 is not limited to this shape as long as it is long in the longitudinal direction L, for example, a rectangular shape long in the longitudinal direction L, and both ends of the longitudinal direction L are substantially semicircular outward. It may have a rectangular shape, an hourglass shape, or the like. The absorbent article 1 has, for example, a dimension L in the longitudinal direction of 350 to 960 mm and a dimension of W in the width direction 160 to 600 mm.

The absorbent article 1 includes a front surface sheet 2, a back surface sheet 3, and an absorbent body 4. The surface sheet 2 is a liquid permeable sheet located on the skin side. Examples of the surface sheet 2 include liquid-permeable non-woven fabrics and woven fabrics, synthetic resin films having liquid-permeable holes formed therein, and composite sheets thereof. The back surface sheet 3 is a liquid impermeable sheet located on the non-skin side. Examples of the back sheet 3 include a liquid-impermeable non-woven fabric, a synthetic resin film, and a composite sheet thereof. The absorber 4 is a member having liquid absorbency and liquid retention property, which is located between the front surface sheet 2 and the back surface sheet 3. Examples of the material of the absorber 4 include pulp fibers, synthetic fibers, and polymer absorbers. The thickness, basis weight, etc. of the front surface sheet 2, the back surface sheet 3, and the absorber 4 are appropriately adjusted in consideration of the absorption performance of the absorbent article 1. Each material is joined by a known method such as an adhesive.

The absorbent article 1 is arranged between the surface sheet 2 and the absorber 4, and includes an activated carbon member containing particles of activated carbon. In a plan view, the activated carbon members continuously extend from one edge 4T1 of the absorber 4 in the longitudinal direction L to the other edge 4T2, and are arranged on both sides in the width direction W with the longitudinal center line CL in between. Contains the activated carbon sheet 6 of. In the present embodiment, each of the pair of activated carbon sheets 6 is a liquid-permeable sheet on which particles of activated carbon are supported, and has a substantially rectangular shape in a plan view. Examples of the activated carbon sheet 6 include those in which activated carbon particles are supported on a sheet body formed of fibers. For example, the activated carbon sheet 6 is produced by using natural fibers such as pulp, synthetic fibers such as polyethylene, and activated carbon particles. Mixed paper is mentioned. The activated carbon is not particularly limited, and examples thereof include carbides such as coconut husk, bamboo, and wood (coconut husk charcoal, bamboo charcoal, charcoal, etc.). In addition to activated carbon, the activated carbon sheet 6 may further contain known deodorant materials such as zeolite, silica gel, alumina, and porous glass.

The absorbent article 1 has a central non-containing region MNA that does not contain the activated carbon sheet 6 and an end-free region ENA that does not contain the activated carbon sheet 6 in a plan view. The central non-containing region MNA is, in plan view, from one end edge 4T1 of the longitudinal direction L of the absorber 4 inside the width direction W of the pair of activated carbon sheets 6 (the central portion of the width direction W of the absorber 4). It extends continuously to the other edge 4T2. In the present embodiment, the shape is substantially rectangular, but the shape is not particularly limited. On the other hand, the end-free region ENA is located at both ends of the absorber 4 in the width direction W on the outside of the pair of activated carbon sheets 6 in the width direction W in a plan view. In the present embodiment, the crotch portion A2 is present in the longitudinal direction L at a position excluding the constricted portion, the anterior end portion of the ventral side portion A1, and the posterior end portion of the dorsal side portion A3. The shape is a substantially trapezoidal shape with the inside of the width direction W as the lower bottom, but the shape is not particularly limited. In the absorbent article 1, the region of the pair of activated carbon sheets 6 can be said to be the contained region ACA containing the activated carbon sheet 6 in a plan view.

At this time, the absorber 4 has a central portion 30 located at the center of the width direction W of the absorber 4, which does not overlap with the pair of activated carbon sheets 6 but overlaps with the central non-containing region MNA in a plan view. There is. Further, the absorber 4 does not overlap with the pair of activated carbon sheets 6 in a plan view, is located at the end of the absorber 4 in the width direction W, and is located at the front portion of the end-free region ENA in the longitudinal direction L. It has a front end portion 31 that overlaps and a rear end portion 32 that overlaps the rear portion. In the absorbent article 1, when viewed from the skin side, the region where the pair of activated carbon sheets 6 are present appears to be slightly darkened by the particles of the activated carbon via the surface sheet 2. Therefore, when the area is moistened with urine, the color of the urine looks blackish and different from the actual color, reflecting the black color of the particles of activated carbon. On the other hand, in the absorbent article 1, when viewed from the skin side, the central non-containing region MNA and the end non-containing region ENA are located at the central portion 30, the front end portion 31 and the rear of the absorber 4 via the surface sheet 2. The end portion 32 makes it appear white. Therefore, when the area is moistened with urine, the color of the urine looks the same as the actual color, reflecting the white color of each part of the absorber 4.

The thickness, basis weight, amount of particles of activated carbon, etc. of the activated carbon sheet 6 are appropriately adjusted in consideration of the deodorizing function of the activated carbon sheet 6. In the present embodiment, the thickness of the activated carbon sheet 6 is preferably 0.1 to 10 mm from the viewpoint of retaining a sufficient amount of activated carbon particles (lower limit) and not hardening the absorbent article 1 (upper limit), and is 0. .2-5 mm is more preferred. ^{Further, the lower limit of the basis weight of the activated carbon sheet 6 is preferably 1 to 80 g / m 2} from the viewpoint of sufficiently exerting the deodorizing function (lower limit) and the viewpoint of not hardening the absorbent article 1 (upper limit), preferably 10 to 60 g. / M ² is more preferable. The amount (ratio) of the activated carbon particles in the activated carbon sheet 6 is 1 to 30% by mass from the viewpoint of sufficiently exerting the deodorizing function (lower limit) and the viewpoint of suppressing the falling off of the activated carbon particles (upper limit). Is preferable, and 2 to 15% by mass is more preferable.

Since such an absorbent article 1 is provided with a pair of activated carbon sheets 6 on the skin side of the absorber 4, the odor of urine of the surface sheet 2 and the absorber 4 is absorbed by the pair of activated carbon sheets 6 and suppressed. can do.
At that time, the absorbent article 1 is located at the inner and outer positions of the pair of activated carbon sheets 6 in the width direction W, that is, in a plan view, the central portion (central portion 30) and both ends of the absorbent body 4 in the width direction W. A central non-containing region MNA and an end-free region ENA that do not contain the activated carbon sheet 6 are provided at positions corresponding to (front end portion 31 and rear end portion 32), respectively.
Therefore, first, the activated carbon sheet 6 does not exist in the central portion of the absorber 4 in the width direction W, which is the region where urine is mainly directly excreted (urination region STA). Thereby, the color of urine absorbed in the central portion 30 of the absorber 4 can be accurately confirmed without being affected by the color of the activated carbon sheet 6.
Further, both ends of the absorber 4 in the longitudinal direction L and the width direction W where urine leakage may occur, that is, both ends of the central portion 30 (central non-containing region MNA) in the longitudinal direction L, and the anterior end portion 31 and The activated carbon sheet 6 is not present in the rear end portion 32 (end-free region ENA). Therefore, whether or not urine has diffused to both ends in the longitudinal direction L and the width direction W, that is, whether or not urine leakage has occurred, and the position of the urine leakage are determined by the central portion 30 and the anterior end portion 31. And the presence or absence of urine color in the posterior end portion 32 can be easily confirmed. At that time, since activated carbon particles are used as the deodorant instead of tea leaves, the region where the activated carbon particles are present becomes blackish, so that the color of urine and the actual color of urine in that region (central portion 30). , The color of urine at the anterior end portion 31 and the posterior end portion 32) can be easily distinguished, and it is possible to suppress the misidentification of the color of urine in that region as actual urine.
As described above, in the absorbent article 1, the user or the caregiver can accurately confirm the place where the urine leak occurs while suppressing the odor of urine. Thereby, it is possible to grasp the wearing state of the absorbent article 1, identify the cause of urine leakage, and use it for suppressing the recurrence of urine leakage. In addition, the color of urine at that time can be confirmed accurately, and the health condition of the user can be easily grasped. Therefore, it is possible to suppress the odor of urine and to accurately confirm the place where urine leaks and the color of urine.

In the present embodiment, in the absorber 4, whether or not urine leakage has occurred from the anterior or posterior edge of the longitudinal direction L is determined by the vicinity of the anterior or posterior edge of the central non-containing region MNA in the longitudinal direction L. It can be confirmed from the color of urine. Whether or not urine leakage has occurred from the front edge of the longitudinal direction L of the right or left edge of the width direction W in the absorber 4 is determined by whether or not urine leakage has occurred on the right or left side of the width direction W and the front side of the longitudinal direction L. It can be confirmed from the color of urine in the non-containing region ENA. In the absorber 4, whether or not urine leakage has occurred from the rear edge of the longitudinal direction L of the right or left edge of the width direction W is determined by whether or not urine leakage has occurred on the right or left side of the width direction W and after the longitudinal direction L. It can be confirmed from the color of urine in the end-free region ENA on the side. In this way, the regions are separated by the activated carbon sheet 6 and / or separated from each other. Therefore, the position where urine leakage should be confirmed can be easily grasped, and thereby the presence or absence of urine leakage and the position of urine leakage can be easily grasped at a glance. Thereby, it is possible to grasp the wearing state of the absorbent article 1, identify the cause of urine leakage, and use it for suppressing the recurrence of urine leakage.

In the present embodiment, the particles of the activated charcoal of the activated charcoal sheet 6 have a particle size distribution such that at least 90% by volume of particles, preferably 95% by volume of particles have a particle size of 1 μm or more and 60 μm or less. There is. By making most of the particles of activated carbon having a particle size of 60 μm or less, the particles of activated carbon can be easily inserted between the constituent fibers of the sheet body of the activated carbon sheet 6, whereby the particles can be easily supported on the sheet body. can do. Further, by setting the particle size of most of the particles of activated carbon to 1 μm or more, even if some of the particles of activated carbon fall off from the sheet body, the dropped particles can hardly pass through the surface sheet 2. Thereby, it is possible to prevent the dropped particles from adhering to the central non-containing region MNA and making it difficult to confirm the color of urine in the central non-containing region MNA. From the viewpoint of suppressing the falling out of the activated carbon particles, the proportion of particles having a particle size of more than 20 μm is preferably less than 30% by volume, and the proportion of particles having a particle size of more than 30 μm is preferably less than 5% by volume.
in this way,

In the present embodiment, the absorber 4 is located on the upper layer absorber 21 located on the skin side and the lower layer located on the non-skin side of the upper layer absorber 21 and the entire surface on the skin side is covered with the upper layer absorber 21. Includes absorber 22 and. The shape of the upper layer absorber 21 is a gourd shape in which the crotch portion A2 is constricted in the width direction W, and is substantially similar to the shape of the absorbent article 1. The shape of the lower layer absorber 22 is a rectangular shape that is long in the longitudinal direction L and short in the width direction W. In the present embodiment, both ends of the upper layer absorber 21 in the longitudinal direction L are located outside the both ends of the lower layer absorber 22 in the longitudinal direction L, so that the upper layer absorber 21 is the lower layer absorber 22. It is formed wider on both sides in the longitudinal direction L than the above. Further, both end edges of the upper layer absorber 21 in the width direction W are located outside the longitudinal direction L from both end edges of the lower layer absorber 22 in the width direction W, so that the upper layer absorber 21 is located more than the lower layer absorber 22. Widely formed on both sides in the width direction W. Therefore, in the present embodiment, the both end edges 4T1 and 4T2 of the absorber 4 in the longitudinal direction L are the end edges 21T1 and 21T2 of the upper layer absorber 21 in the longitudinal direction L. However, the shapes of the upper layer absorber 21 and the lower layer absorber 22 are not limited to these shapes, and other shapes may be used as long as the entire surface of the lower layer absorber 22 on the skin side is covered with the upper layer absorber 21. Examples of these shapes include a rectangular shape long in the longitudinal direction L, a rectangular shape having substantially semicircular ends on both ends in the longitudinal direction L, and an hourglass shape. The lower absorber 22 includes an absorbent core 23 and a core wrap 24 that encloses the absorbent core 23. The thickness, basis weight, etc. of the upper layer absorber 21 and the lower layer absorber 22 are appropriately adjusted in consideration of the absorption performance of the absorber 4. The absorber 4 may be one layer or three or more layers. Examples of the material of the upper layer absorber 21 and the absorbent core 23 include pulp fibers and polymer absorbers. In this way, by covering the entire lower layer absorber 22 from the skin side by the upper layer absorber 21, the upper layer absorber 21 can block or suppress the diffusion of the urine odor generated from the lower layer absorber 22 to the skin side. .. Therefore, the odor of urine present in the absorber 4 can be suppressed.

In the present embodiment, the upper layer absorber 21 and the lower layer absorber 22 both contain a super absorbent polymer and pulp fibers. When the ratio of the mass of the pulp fiber to the total mass of the highly water-absorbent polymer and the pulp fiber is taken as the pulp fiber ratio, the pulp fiber ratio of the upper layer absorber 21 is higher than the pulp fiber ratio of the lower layer absorber 22. Since the pulp fiber ratio of the upper layer absorber 21 is relatively high, urine can be widely diffused in the upper layer absorber 21 in the plane direction (longitudinal direction L and / or width direction W). Therefore, the activated carbon sheet 6 can be widely and effectively used, and the odor of urine can be efficiently suppressed by the activated carbon sheet 6.

In this embodiment, the absorbent article 1 further comprises a pair of leakproof walls 7. Each of the pair of leak-proof walls 7 extends along the longitudinal direction L on both sides of the surface sheet 2 in the width direction W, and is arranged at a predetermined interval in the width direction W. In each of the pair of leak-proof walls 7, the outer edge in the width direction W is a fixed end FX fixed to the surface sheet 2, and the inner edge is a free end FR. An elastic member 8 exemplified for a rubber thread is arranged in the vicinity of the free end FR in the leak-proof wall 7 so as to extend in the longitudinal direction L. In the present embodiment, the absorbent article 1 is provided with a pair of side sheets 5 bonded to both ends of the surface sheet 2 in the width direction W and extending in the longitudinal direction L on the surface on the skin side, and is provided with a pair of leakage-proof articles. Each of the walls 7 is formed by an inner portion of each of the pair of side sheets 5 in the width direction W. The leak-proof wall 7 and the side sheet 5 are not particularly limited, and examples thereof include a hydrophobic sheet, for example, a hydrophobic non-woven fabric.

In the present embodiment, the fixed end FX is arranged outside the width direction W with respect to the outer edge 6E in the width direction W in each of the pair of activated carbon sheets 6. That is, in the width direction W, the activated carbon sheet 6 is not arranged outside the position where the leak-proof wall 7 blocks urine, but is arranged in the region where urine is mainly present. Therefore, the activated carbon sheet 6 can be widely and effectively used, and the odor of urine can be efficiently suppressed by the activated carbon sheet 6.

In the present embodiment, the absorbent article 1 further includes an exterior sheet 9. The exterior sheet 9 is a liquid-impermeable sheet located on the non-skin side of the back sheet 3. The exterior sheet 9 is not particularly limited, and examples thereof include the same as the back sheet 3.

In the present embodiment, the absorbent article 1 extends along the longitudinal direction L and is arranged at intervals in the width direction W, and a plurality of folding lines FL1 for folding the absorbent article 1 in the width direction W, and It has a plurality of folding lines FL2 for folding the absorbent article 1 in the longitudinal direction L, which extends along the width direction W and is arranged at intervals in the longitudinal direction L. In the present embodiment, the absorbent article 1 has a pair of fold lines FL1 and a pair of fold lines FL2. Then, when the absorbent article 1 is stored in a packaging bag (not shown), for example, both outer portions of the absorbent article 1 in the width direction W with respect to the pair of folding lines FL1 are in the width direction W, respectively. It is folded inward and overlaps the portion between the pair of folding lines FL1 (folded in three in the width direction W). Further, both outer portions in the longitudinal direction L from the pair of fold lines FL2 are folded inward in the longitudinal direction L, respectively, and overlap the portions between the pair of fold lines FL2 (folded in three in the longitudinal direction L). ..

In this embodiment, each of the pair of leak-proof walls 7 overlaps at least a part of each of the pair of activated carbon sheets 6 in the thickness direction T. That is, in a plan view, each of the pair of leak-proof walls 7 covers at least a part of each of the pair of activated carbon sheets 6 (via the surface sheet 2). Therefore, when the absorbent article 1 is folded (example: tri-folded in the width direction W and the longitudinal direction L), each of the pair of activated carbon sheets 6 in the folded portion of the absorbent article 1 and the portion concerned A pair of leak-proof walls 7 can be interposed between the folded central non-containing region MNA. Thereby, it is possible to prevent the particles of the activated carbon of the activated carbon sheet 6 from adhering to the surface sheet 2 of the central non-containing region MNA and making it difficult to confirm the color of urine in the central non-containing region MNA.

In the present embodiment, the absorbent article 1 is folded in three in the width direction W by a pair of folding lines FL1. Here, if each of the pair of folding lines FL1 is located inside each of the pair of activated carbon sheets 6, when the absorbent article 1 is folded, the pair of folded activated carbon sheets in the absorbent article 1 are folded. Each of 6 will overlap the central non-containing region MNA (via the surface sheet 2) in the thickness direction T. In that case, if the activated carbon particles of the activated carbon sheet 6 fall off, they may adhere to the surface sheet 2 of the central non-containing region MNA via the surface sheet 2 and it may be difficult to confirm the color of urine in the central non-containing region MNA. There is. Therefore, in this absorbent article 1, each of the pair of folding lines FL1 overlaps with each of the pair of activated carbon sheets 6. Therefore, in the folded activated carbon sheet 6 in the absorbent article 1, the region overlapping the central non-containing region MNA in the thickness direction T can be reduced. As a result, it is possible to prevent particles of the activated carbon of the activated carbon sheet 6 from adhering to the surface sheet 2 of the central non-containing region MNA and making it difficult to confirm the color of urine on the surface sheet 2 of the central non-containing region MNA.

In the present embodiment, in the width direction W, each of the pair of folding lines FL1 is located outside the center of each of the pair of activated carbon sheets 6. Therefore, in the folded activated carbon sheet 6 in the absorbent article 1, the region overlapping the central non-containing region MNA in the thickness direction T can be eliminated. Therefore, it is possible to surely prevent the particles of activated carbon MNA from adhering to the central non-containing region and making it difficult to confirm the color of urine in the central non-containing region MNA.

In the present embodiment, the absorbent article 1 further includes a diffusion sheet 12 between the pair of activated carbon sheets 6 and the surface sheet 2. The diffusion sheet 12 has a substantially rectangular shape having a long longitudinal direction L and a short width direction W in a plan view, and the sizes of the width direction W and the longitudinal direction L are substantially the same as the entire pair of activated carbon sheets 6. .. Examples of the diffusion sheet 12 include non-woven fabrics and tissues. The diffusion sheet 12 can diffuse urine widely in the plane direction (width direction W and longitudinal direction L). Since the diffusion sheet 12 covers the activated carbon sheet 6 from the skin side, even if some of the particles of the activated carbon fall off from the sheet body of the activated carbon sheet 6, the dropped particles reach the surface sheet 2. Can be blocked or suppressed. As a result, it is possible to prevent particles of activated carbon from adhering to the central non-containing region MNA and making it difficult to confirm the color of urine in the central non-containing region MNA.

In the present embodiment, the absorbent article 1 is a super absorbent polymer sheet containing a superabsorbent polymer between the diffusion sheet 12 and the surface sheet 2, and therefore between the pair of activated carbon sheets 6 and the surface sheet 2. (SAP sheet) 11 is further provided. The super absorbent polymer sheet 11 is located on the dorsal side A3 and has a substantially rectangular shape. However, the super absorbent polymer sheet 11 includes a superabsorbent polymer and a wrap sheet containing the superabsorbent polymer. The content of the superabsorbent polymer with respect to the entire superabsorbent polymer sheet 11 is 80% by mass or more, preferably 90% by mass or more. Examples of the wrap sheet include liquid-permeable non-woven fabrics and tissues. As a result, when the superabsorbent polymer sheet 11 absorbs urine and swells, the odor of urine generated from the absorber 4 located on the non-skin side of the superabsorbent polymer sheet 11 is swollen and the superabsorbent polymer is swollen. It can be blocked or suppressed by the sheet 11. Therefore, the odor of urine present in the absorber 4 can be suppressed.

In the present embodiment, in the central non-containing region MNA, that is, in the region where the activated carbon sheet 6 does not exist, the upper layer absorber 21 and the lower layer absorber 22 extend along the longitudinal direction L and are recessed in the thickness direction T. It has slits 13 and 14. For example, the slit 13 of the upper layer absorber 21 is recessed in the thickness direction T from the skin side to the non-skin side, and is a through hole penetrating the upper layer absorber 21 in the thickness direction T in the present embodiment. The slit 13 is formed in the range from the crotch portion A2 to the posterior portion of the ventral portion A1 in the longitudinal direction L, and in the range inside the central non-containing region MNA in the plan view in the width direction W, and therefore, the urination region STA. It is formed inside. The slit 14 of the lower layer absorber 22 is recessed in the thickness direction T from the skin side to the non-skin side, and is a through hole penetrating the lower layer absorber 22 in the thickness direction T in the present embodiment. The slit 14 is formed in a range inside the slit 13 in a plan view in the longitudinal direction L and the width direction W, and is also formed in the urination region STA. Therefore, the excreted urine is mainly guided to the slits 13 and 14, and quickly reaches the upper layer absorber 21 and the lower layer absorber 22 through the slits 13 and 14 without much intervention of the pair of activated carbon sheets 6. It is quickly absorbed by the upper layer absorber 21 and the lower layer absorber 22 and can diffuse in the plane direction (width direction W and longitudinal direction L). Therefore, the pair of activated carbon sheets 6 located on the skin side of the upper layer absorber 21 and the lower layer absorber 22 can block or suppress the odor of urine generated from the upper layer absorber 21 and the lower layer absorber 22. Therefore, the odor of urine present in the absorber 4 can be suppressed. Further, in the present embodiment, a pair of embossed portions 15 extending along the longitudinal direction L and extending from the upper layer absorber 21 to the lower layer absorber 22 in the thickness direction T are provided on both outer sides of the slits 13 and 14 in the width direction W. Have. Therefore, urine can be quickly and widely diffused in the longitudinal direction L and the thickness direction T, and can be quickly absorbed by the absorber 4. Therefore, the activated carbon sheet 6 located on the absorber 4 can block or suppress the odor of urine.

In the above embodiment, each numerical value can be measured by the following method.
The basis weight of the sheet or absorber (upper layer absorber, lower layer absorber) is measured by the following method. First, three samples of a predetermined size (example: 10 mm × 10 mm) are cut out from a sheet or an absorber. Next, the masses of the three cut-out samples are measured with a direct balance (example: electronic balance HF-300 manufactured by Kensei Kogyo Co., Ltd.). ^{Then, the mass (g / m 2} ) per unit area of the sheet or absorber is calculated from the average value of the masses of the three samples to obtain the basis weight of the sheet or absorber.

The basis weight of the super absorbent polymer is measured by the following method. First, three samples of a predetermined size (example: 50 mm × 50 mm) are cut out from the absorber (upper layer absorber, lower layer absorber). Then, the mass of the sample is measured. Subsequently, only the material other than the super absorbent polymer (mainly pulp fiber) is carefully taken out from the sample, and the mass of the material is measured. Then, the mass of the superabsorbent polymer is calculated by subtracting the mass of the material from the mass of the sample. However, the mass is measured with a direct balance (example: electronic balance HF-300 manufactured by Kensei Kogyo Co., Ltd.). ^{Then, the mass (g / m 2} ) per unit area of the superabsorbent polymer is calculated from the average mass of the three samples and the average mass of the superabsorbent polymer in the three samples. , The basis weight of the super absorbent polymer.

In the above embodiment, the particle size distribution of the activated charcoal particles is measured by using a laser diffraction / scattering type particle size distribution measuring device (example: LA-920, manufactured by HORIBA, Ltd.) under the following conditions.
-Measurement cell: Flow cell-Particle size standard: Volume-Dispersion medium: 90% by mass ethanol aqueous solution-Transmittance: 70-90%
-Sample concentration: 0.1%

The absorbent article of the present invention is not limited to the above-described embodiment, and as long as it does not deviate from the scope of the purpose of the present invention, other configurations may be added or some configurations may be deleted or partially. It is possible to replace the configuration of with another configuration.

1 Absorbent article 2 Surface sheet 4 Absorber 6 Activated carbon sheet 4T1, 4T2 Edge edge CL Longitudinal center line MNA Central non-containing area ENA Edge non-containing area

Claims (11)

Particles of activated carbon having a longitudinal direction, a width direction, and a thickness direction, which are arranged between the surface sheet, the absorber arranged on the non-skin side of the surface sheet, and the surface sheet and the absorber. An absorbent article comprising an activated carbon member comprising:
The activated carbon member extends continuously from one edge of the absorber in the longitudinal direction to the other edge in a plan view, and is a pair of activated carbons arranged on both sides in the width direction with a longitudinal center line in between. Including sheet,
The absorbent article is
In a plan view, inside the widthwise direction of the pair of activated carbon sheets, a central non-containing region extending continuously from one edge of the absorber in the longitudinal direction to the other edge and not containing the activated carbon sheet. ,
In a plan view, on the outside of the pair of activated carbon sheets in the width direction, the end-free regions located at both ends of the absorber in the width direction and not containing the activated carbon sheet.
Have,
Absorbent article. The absorber is
With the upper absorber,
The lower layer absorber, which is located on the non-skin side of the upper layer absorber and whose entire surface on the skin side is covered with the upper layer absorber,
including,
The absorbent article according to claim 1. The upper layer absorber and the lower layer absorber both contain a super absorbent polymer and pulp fibers.
Assuming that the ratio of the mass of the pulp fiber to the total mass of the highly water-absorbent polymer and the pulp fiber is the pulp fiber ratio, the pulp fiber ratio of the upper layer absorber is higher than the pulp fiber ratio of the lower layer absorber.
The absorbent article according to claim 2. In the central non-containing region, the upper layer absorber and the lower layer absorber have slits extending along the longitudinal direction and recessing in the thickness direction.
The absorbent article according to claim 2 or 3. A pair of leak-proof walls extending along the longitudinal direction and arranged at predetermined intervals in the width direction are further provided on both sides of the surface sheet in the width direction.
In each of the pair of leak-proof walls, the outer edge in the width direction is a fixed end fixed to the surface sheet, and the inner edge in the width direction is a free end.
The fixed end is arranged outside the width direction of each of the pair of activated carbon sheets with respect to the outside edge in the width direction.
The absorbent article according to any one of claims 1 to 4. It has a pair of folding lines extending along the longitudinal direction and spaced apart in the width direction for folding the absorbent article in the width direction.
In the width direction, each of the pair of fold lines overlaps with each of the pair of activated carbon sheets.
The absorbent article according to any one of claims 1 to 5. In the width direction, each of the pair of fold lines is located outside the center of each of the pair of activated carbon sheets.
The absorbent article according to claim 6. A pair of leak-proof walls extending along the longitudinal direction and arranged at predetermined intervals in the width direction are further provided on both sides of the surface sheet in the width direction.
Each of the pair of leak-proof walls overlaps at least a portion of each of the pair of activated carbon sheets in the thickness direction.
The absorbent article according to claim 6 or 7. At least 90% by volume of the particles of the activated carbon have a particle size of 1 μm or more and 60 μm or less.
The absorbent article according to any one of claims 1 to 8. A super absorbent polymer sheet containing a superabsorbent polymer is further provided between the pair of activated carbon sheets and the surface sheet.
The absorbent article according to any one of claims 1 to 9. A diffusion sheet is further provided between the pair of activated carbon sheets and the surface sheet.
The absorbent article according to any one of claims 1 to 10.

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