阅读说明：本技术 吸收性物品及上述吸收性物品的制造方法、以及无纺布或开孔膜的作为透过性调整构件的使用 (Absorbent article, method for producing absorbent article, and use of nonwoven fabric or apertured film as permeability adjustment member ) 是由 合田裕树 山口正史 于 2018-02-28 设计创作，主要内容包括：提供容易视觉辨认压花部的纵深、难以与着色剂直接接触且难以感觉到压花部的硬度的吸收性物品。本分开的吸收性物品具有以下的结构。吸收性物品(1)具备构成构件被压花且透液性片(3)未被压花的、具有配置于肌肤侧面(11)的倾斜部(19)及底部(21)的压花部(25)、和非压花部(29),具备隔着透液性片(3)能够视觉辨认的第1着色部(31)和具有与第1着色部(31)相同或邻接的色相且具有比第1着色部(31)浓的色调的第2着色部(33),第1着色部31配置于非压花部29,而且第2着色部33配置于压花部25的底部21,隔着透液性片3测量的第1着色部31与第2着色部33的色差为3.25以上。(Provided is an absorbent article wherein the depth of an embossed section is easily visually recognized, direct contact with a colorant is difficult, and the hardness of the embossed section is difficult to feel. The divided absorbent article has the following structure. The absorptive article (1) is provided with an embossed section (25) having an inclined section (19) and a bottom section (21) which are arranged on a skin side surface (11) and on which constituent members are embossed and a liquid-permeable sheet (3) is not embossed, and a non-embossed section (29), and is provided with a1 st colored section (31) which is visually recognizable through the liquid-permeable sheet (3), and a2 nd colored section (33) which has the same or adjacent hue as the 1 st colored section (31) and has a darker hue than the 1 st colored section (31), wherein the 1 st colored section (31) is arranged on the non-embossed section (29), the 2 nd colored section (33) is arranged on the bottom section (21) of the embossed section (25), and the color difference between the 1 st colored section (31) and the 2 nd colored section (33) measured through the liquid-permeable sheet (3) is 3.25 or more.)

1. An absorbent article comprising a liquid-permeable sheet, a liquid-impermeable sheet, and a constituent member disposed therebetween, having a skin-side surface, and including an absorbent body,

the absorbent article is provided with: an embossed portion in which the constituent member is embossed and the liquid-permeable sheet is not embossed, the embossed portion having an inclined portion and a bottom portion disposed on the skin side surface; and a non-embossed portion where the constituent member is not embossed,

the absorbent article is provided with: a1 st colored portion which can be visually recognized through the liquid-permeable sheet; and a2 nd colored portion having the same hue as or adjacent to the 1 st colored portion and having a darker hue than the 1 st colored portion,

the 1 st colored portion is disposed on the non-embossed portion, and the 2 nd colored portion is disposed on the bottom of the embossed portion,

the color difference between the 1 st colored part and the 2 nd colored part measured across the liquid-permeable sheet is 3.25 or more.

2. The absorbent article of claim 1,

in the inclined portion of the embossed portion, a1 st colored portion, a2 nd colored portion, or an intermediate colored portion having a color therebetween is disposed.

3. The absorbent article according to claim 1 or 2, wherein,

the constituent member contains a pressure-sensitive coloring agent, and the 2 nd coloring portion contains the pressure-sensitive coloring agent that develops color.

4. The absorbent article according to any one of claims 1 to 3, wherein,

the constituent member contains a non-pressure-sensitive colorant and a pressure-sensitive colorant, the 1 st colored portion is composed of the non-pressure-sensitive colorant, and the 2 nd colored portion is composed of the non-pressure-sensitive colorant and the pressure-sensitive colorant that develops color.

5. The absorbent article according to any one of claims 1 to 4, wherein,

the liquid-permeable sheet is disposed separately from the bottom of the embossed section.

6. The absorbent article according to any one of claims 1 to 5, wherein,

the absorbent body is provided with an absorbent core containing 30 mass% or more of polymeric absorbent particles.

7. The absorbent article according to any one of claims 1 to 6, wherein,

the liquid-permeable sheet has a light transmittance of 20 to 95%.

8. Use of a nonwoven fabric or an apertured film as a permeability adjusting member for adjusting the permeability of a colored portion formed in a constituent member including an absorbent body,

the colored portion has a spot-like colored portion in which the pressure-sensitive colorant is colored in a spot-like manner.

9. The use according to claim 8, wherein,

the non-woven fabric or the perforated film is separated from the spot-shaped color development part.

10. The use according to claim 8 or 9,

the non-woven fabric or the apertured film has a light transmittance of 20-95%.

11. A method for manufacturing an absorbent article according to claim 3,

the method comprises the following steps:

a step of preparing a constituent member containing a pressure-sensitive colorant;

forming an embossed portion on the constituent member; and

and laminating the liquid-permeable sheet on the component member having the embossed portion.

12. The method of claim 11, wherein,

the constituent member further contains a non-pressure-sensitive colorant.

Technical Field

The present disclosure relates to an absorbent article, a method for producing the absorbent article, and use of a nonwoven fabric or an apertured film as a permeability adjusting member.

Background

Absorbent articles having colored portions are known. For example, patent document 1 describes an absorbent article having a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body sandwiched between the liquid-permeable sheet and the liquid-impermeable sheet, wherein the liquid-permeable sheet is provided with a concave portion, and at least a portion where the concave portion is provided has a colored layer in contact with a back surface of the liquid-permeable sheet, and the concave portion appears in a color different from a portion other than the concave portion.

Disclosure of Invention

Problems to be solved by the invention

The absorbent article described in patent document 1 is characterized in that a colored layer disposed under the liquid-permeable sheet is made to be visually recognized in different colors in the concave portion and the portion other than the concave portion, thereby improving the visibility of the concave portion. Specifically, in patent document 1, the liquid-permeable sheet is pressed against the recessed portion by embossing, and the liquid-permeable sheet is brought close to the colored layer, whereby the color of the colored layer is more easily visually recognized than in the portion other than the recessed portion.

The absorbent article described in patent document 1 is excellent in that the coloring agent contained in the coloring layer is less likely to come into direct contact with the wearer by disposing the coloring layer under the liquid-permeable sheet, and the visibility of the recessed portion can be improved. On the other hand, the color difference between the recessed portion and the portion other than the recessed portion depends on the pressure-bonding degree of the liquid-permeable sheet, the distance between the liquid-permeable sheet and the colored layer, and the like, and there is a certain upper limit in the recessed portion in order to make the color of the colored layer easily visible, and there is room for improvement from the viewpoint of visibility. Further, there is room for improvement from the viewpoint of allowing the user to visually recognize the depth of the recessed portion.

In the absorbent article described in patent document 1, the liquid-permeable sheet and the absorbent body must be embossed together, so that the concave portions tend to be hard and the wearer tends to feel the hardness of the concave portions easily. In the absorbent article described in patent document 1, the liquid-permeable sheet may be broken during manufacture, use, or the like, and the constituent members of the absorbent core and the like may easily leak outward.

Accordingly, an object of the present disclosure is to provide an absorbent article in which the depth of an embossed portion is easily visually recognized, direct contact with a colorant is difficult, and hardness of the embossed portion is difficult to feel.

Means for solving the problems

The present inventors have found that an absorbent article including a liquid-permeable sheet, a liquid-impermeable sheet, and a constituent member disposed therebetween, the constituent member having a skin-side surface and including an absorbent body, is characterized in that the absorbent article includes: an embossed portion in which the constituent member is embossed and the liquid-permeable sheet is not embossed, the embossed portion having an inclined portion and a bottom portion disposed on the skin side surface; and a non-embossed portion in which the constituent member is not embossed, the absorbent article including: a1 st colored portion which can be visually recognized through the liquid-permeable sheet; and a2 nd colored portion having a hue the same as or adjacent to that of the 1 st colored portion and having a darker hue than that of the 1 st colored portion, wherein the 1 st colored portion is disposed in the non-embossed portion, the 2 nd colored portion is disposed at the bottom of the embossed portion, and a color difference between the 1 st colored portion and the 2 nd colored portion, measured across the liquid-permeable sheet, is 3.25 or more.

ADVANTAGEOUS EFFECTS OF INVENTION

The absorbent article is easy to visually recognize the depth of the embossed portion, is difficult to directly contact with the colorant, and is difficult to feel the hardness of the embossed portion.

Drawings

Fig. 1 is a plan view of an absorbent article 1, specifically, a disposable diaper, according to embodiment 1.

Fig. 2 is a sectional view of the absorbent article 1 of section II-II of fig. 1.

Fig. 3 is a plan view of the absorbent body 9.

Fig. 4 is a sectional view of the absorbent body 9 of section IV-IV of fig. 3.

Fig. 5 is a diagram for explaining the absorbent article 1 according to embodiment 2.

FIG. 6 is an enlarged image of the simple absorber No.1 in the example.

Fig. 7 is an image of the simple absorbent article No.1 in the example.

Detailed Description

[ definitions ]

[ color phase ]

In the present specification, the "hue" of the 1 st coloring part and the 2 nd coloring part refers to each region of R, YR, Y, GY, G, BG, B, PB, P and RP divided in "division of hue circle" in fig. 1 of "display method of 3.1 hue" in JIS Z87211993. In fig. 1 of "3.1 hue display method", each region of R, YR, Y, GY, G, BG, B, PB, P, and RP forms a circle around the circumference.

R, YR, Y, GY, G, BG, B, PB, P and RP are referred to as red (R), yellow-red (YR), yellow (Y), yellow-Green (GY), green (G), cyan (BG), blue (B), blue-violet (PB), violet (P) and red-violet (RP), respectively (the symbols in the brackets are labeled for ease of understanding).

In the present specification, the 2 colored portions to be compared have "the same hue", which means that the 2 colored portions to be compared belong to the same hue, for example, B (blue). In the present specification, the two colored portions to be compared have "adjacent hues" means that the two colored portions to be compared belong to adjacent hues, for example, one colored portion belongs to B (blue) and the other colored portion belongs to PB (blue violet).

[ Thick tone ]

Since the 1 st colored portion and the 2 nd colored portion have the same or adjacent hues and have a predetermined color difference, it is clear in the art whether or not the 2 nd colored portion has a darker hue than the 1 st colored portion.

In the present specification, the 2 nd colored portion preferably has a higher chroma, preferably a lower lightness, and more preferably has a higher chroma and a lower lightness than the 1 st colored portion. This is from the viewpoint of imparting a sense of depth to the embossed portion.

Specifically, the present disclosure relates to the following aspects.

[ means 1]

An absorbent article comprising a liquid-permeable sheet, a liquid-impermeable sheet, and a constituent member disposed therebetween, having a skin-side surface, and including an absorbent body,

the absorbent article includes: an embossed portion in which the constituent member is embossed and the liquid-permeable sheet is not embossed, the embossed portion having an inclined portion and a bottom portion disposed on the skin side surface; and a non-embossed portion in which the constituent member is not embossed,

the absorbent article includes: a1 st colored portion which can be visually recognized through the liquid-permeable sheet; and a2 nd colored portion having the same hue as or adjacent to the 1 st colored portion and having a darker hue than the 1 st colored portion,

the 1 st colored portion is disposed on the non-embossed portion, and the 2 nd colored portion is disposed on the bottom of the embossed portion,

the color difference between the 1 st colored part and the 2 nd colored part measured across the liquid-permeable sheet is 3.25 or more.

In the absorbent article, the 1 st colored portion is disposed in the non-embossed portion, the 2 nd colored portion having the same hue as or adjacent to the 1 st colored portion and having a darker hue than the 1 st colored portion is disposed at the bottom of the embossed portion, and the color difference between the 1 st colored portion and the 2 nd colored portion, measured across the liquid-permeable sheet, is 3.25 or more, so that the colorants constituting the 1 st colored portion and the 2 nd colored portion are less likely to come into direct contact with the user, and the depth of the embossed portion constituting the member is easily visually recognized by the user, such as a wearer or a caregiver, across the liquid-permeable sheet.

In addition, in the absorbent article, since the liquid-permeable sheet does not constitute the embossed portion, it is difficult for the user to perceive the hardness of the embossed portion when using the absorbent article.

As described above, the colorant of the absorbent article is less likely to come into direct contact with the user, the depth of the embossed portion is easily visually recognized, and the hardness of the embossed portion is less likely to be felt.

[ means 2]

The absorbent article according to mode 1, wherein the first colored portion, the second colored portion, or an intermediate colored portion having a color therebetween is disposed on the inclined portion of the embossed portion.

In the absorbent article, the 1 st colored portion, the 2 nd colored portion, or the intermediate colored portion having a color therebetween is disposed in the inclined portion of the embossed portion, and therefore, the user can easily visually recognize the depth of the embossed portion.

[ means 3]

The absorbent article according to mode 1 or 2, wherein the constituent member contains a pressure-sensitive coloring agent, and the 2 nd colored portion contains the pressure-sensitive coloring agent that develops color.

Since the constituent member of the absorbent article contains the pressure-sensitive coloring agent and the 2 nd colored portion contains the pressure-sensitive coloring agent that develops color, the pressure-sensitive coloring agent that develops color and the 2 nd colored portion can be easily formed by forming the embossed portion on the constituent member containing the pressure-sensitive coloring agent.

Further, the absorbent body included in the constituent member is soft due to the inclusion of pulp fibers or the like, and the pressure-sensitive colorant is difficult to develop uniformly, and a spotted color development portion where the pressure-sensitive colorant develops spotted color may be formed at the bottom of the embossed portion. The spot-like colored portion is not preferable from the viewpoint of beauty, and a feeling similar to that of phobia (trypophobia) may be felt on the spot-like colored portion depending on a person.

In the absorbent article described above, since the liquid-permeable sheet does not constitute the embossed portion, even when the pressure-sensitive colorant has a spotted colored portion at the bottom of the embossed portion, the liquid-permeable sheet has a function similar to that of ground glass that functions as ground glass, and therefore the spotted colored portion at the bottom can be seen substantially uniformly through the liquid-permeable sheet, and it is difficult for the user to feel a sensation similar to that of fear of concentration.

[ means 4]

The absorbent article according to any one of aspects 1 to 3, wherein the constituent member contains a non-pressure-sensitive colorant and a pressure-sensitive colorant, the 1 st colored portion is composed of the non-pressure-sensitive colorant, and the 2 nd colored portion is composed of the non-pressure-sensitive colorant and the pressure-sensitive colorant that develops color.

Since the constituent member of the absorbent article contains a non-pressure-sensitive coloring agent and a pressure-sensitive coloring agent, the 1 st colored portion is composed of the non-pressure-sensitive coloring agent, and the 2 nd colored portion is composed of the non-pressure-sensitive coloring agent and the pressure-sensitive coloring agent that develops color, the constituent member and the absorbent article can be easily formed by forming an embossed portion on the constituent member containing the non-pressure-sensitive coloring agent and the pressure-sensitive coloring agent. In addition, in the absorbent article described above, even in the case where the pressure-sensitive colorant has a spot-like colored portion at the bottom of the embossed portion, the user hardly feels a sensation similar to the dense phobia.

[ means 5]

The absorbent article according to any one of aspects 1 to 4, wherein the liquid-permeable sheet is disposed apart from a bottom portion of the embossed portion.

In the absorbent article described above, the liquid-permeable sheet is disposed apart from the bottom portion of the embossed portion, and therefore the colorant constituting the 2 nd colored portion disposed at the bottom portion of the embossed portion is less likely to move toward the user. Further, even in the case where the pressure-sensitive colorant has a spotted colored portion on the bottom portion of the embossed portion, the liquid-permeable sheet can have a function similar to that of ground glass higher than that in the case where the liquid-permeable sheet is in contact with the bottom portion of the embossed portion.

[ means 6]

The absorbent article according to any one of aspects 1 to 5, wherein the absorbent body includes an absorbent core containing 30 mass% or more of the polymeric absorbent particles.

In the absorbent article, since the absorbent body includes the absorbent core containing the polymer absorbent particles in a predetermined amount or more, the absorbent core requires a higher pressure to form the embossed portions in the constituent members than in the case where the embossed portions are formed in the constituent members not containing the polymer absorbent particles in a predetermined amount or more.

In general, when the liquid-permeable sheet constitutes a part of the embossed portion, if the embossed portion is formed at a high pressure, the liquid-permeable sheet tends to be easily broken in the vicinity of the embossed portion.

In the absorbent article described above, the liquid-permeable sheet does not constitute the embossed portion, and therefore, even when the embossed portion is formed under high pressure, the liquid-permeable sheet is less likely to break in the vicinity of the embossed portion, and the polymeric absorbent particles are less likely to leak from the liquid-permeable sheet.

[ means 7]

The absorbent article according to any one of aspects 1 to 6, wherein the liquid-permeable sheet has a light transmittance of 20 to 95%.

In the absorbent article, the liquid-permeable sheet has a predetermined light transmittance, and therefore, the liquid-permeable sheet facilitates the user to visually recognize the 1 st colored portion and the 2 nd colored portion formed in the constituent member. Further, the liquid-permeable sheet easily functions as ground glass, and even when the pressure-sensitive colorant has a spotted colored portion on the bottom portion of the embossed portion, the spotted colored portion on the bottom portion can be visually recognized substantially uniformly through the liquid-permeable sheet, so that the user hardly feels a sensation similar to that of the fear disorder.

[ means 8]

Use of a nonwoven fabric or an apertured film as a permeability adjusting member for adjusting the permeability of a colored portion formed in a constituent member including an absorbent body,

the colored portion has a spot-like colored portion in which the pressure-sensitive colorant is colored in a spot-like manner.

In the above use, since the nonwoven fabric or the apertured film is used as the permeability adjusting member for adjusting the permeability of the predetermined colored portion formed on the constituent member including the absorbent body, the colored portion can be easily formed on the constituent member of the absorbent body using the pressure-sensitive colorant, and the colored portion having the spotted colored portion can be visually recognized substantially uniformly through the nonwoven fabric or the apertured film, and therefore, it is difficult for the user to feel a feeling similar to the dense phobia with respect to the spotted colored portion at the bottom.

[ scheme 9]

The use according to mode 8, wherein the nonwoven fabric or the apertured film is separated from the spotted developed part.

In the above use, since the nonwoven fabric or the apertured film is separated from the spot-like colored portion, the nonwoven fabric or the apertured film can exhibit a higher function as the permeability adjusting member than in the case of being in contact with the spot-like colored portion.

[ means 10]

The use according to mode 8 or 9, wherein the nonwoven fabric or the apertured film has a light transmittance of 20 to 95%.

In the above use, since the nonwoven fabric or the apertured film has a predetermined light transmittance, the colored portion formed in the constituent member is easily visible to the user. Further, since the spotted color developed portion of the bottom portion can be seen substantially uniformly through the nonwoven fabric or the apertured film, the user hardly feels a feeling similar to the dense phobia with respect to the spotted color developed portion of the bottom portion.

[ means 11]

A method for manufacturing an absorbent article according to mode 3, wherein the absorbent article is a disposable absorbent article,

the method comprises the following steps:

a step of preparing a constituent member containing a pressure-sensitive colorant;

forming an embossed portion on the constituent member; and

and laminating the liquid-permeable sheet on the component member having the embossed portion.

In the manufacturing method, the absorbent article can be easily manufactured.

[ means 12]

The method according to mode 11, wherein the constituent member further contains a non-pressure-sensitive colorant.

In the manufacturing method, the absorbent article can be easily manufactured.

Hereinafter, the absorbent article of the present disclosure, the method for producing the absorbent article, and the use of the nonwoven fabric or the apertured film as the permeability adjusting member will be described in detail.

[ absorbent article ]

Fig. 1 to 4 are views for explaining an absorbent article 1, specifically, a disposable diaper, according to one embodiment of the present disclosure (hereinafter, referred to as "embodiment 1"). In detail, fig. 1 is a plan view of an absorbent article 1 according to embodiment 1. Fig. 2 is a sectional view of the absorbent article 1 of section II-II of fig. 1. Fig. 3 is a plan view of the absorbent body 9. Fig. 4 is a sectional view of the absorbent body 9 in section IV-IV of fig. 3.

The absorbent article 1 shown in embodiment 1 has a longitudinal direction L, a width direction W, and a thickness direction T that are orthogonal to each other. The absorbent article 1 includes a liquid-permeable sheet 3, a liquid-impermeable sheet 7, and an absorbent body 9 as a constituent member disposed between the liquid-permeable sheet 3 and the liquid-impermeable sheet 7. The liquid-permeable sheet 3 has a skin contact surface 5. The absorber 9 includes a skin side 11 (a liquid-permeable sheet 3 side) disposed on the skin side when worn, and a dressing side 13 (a liquid-impermeable sheet 7 side) disposed on the dressing side when worn. The absorbent body 9 is constituted by an absorbent core 15 and a core covering layer 17 covering the absorbent core 15.

The absorbent article 1 includes: a pair of leakage preventing walls 101 each having an elastic member 103 on both sides in the longitudinal direction L; a fixing portion 105 for fixing the pair of leakage preventing walls 101 to the liquid-permeable sheet 3; a pair of elastic members 107; a pair of strap connectors 109; and a target tape 111, but these are well known in the art, and therefore, the description thereof is omitted.

The absorber 9 includes: a pair of elastic members 113 disposed along the longitudinal direction L at both side edges of the absorber 9; and a pair of 1 st notch portions 115 and a pair of 2 nd notch portions 117 formed at both side edges in the longitudinal direction L of the absorbent core 15.

The overlapping region 23 where the absorbent article 1 overlaps with the absorbent body 9 in the thickness direction T includes a plurality of non-surface embossed portions 25, a plurality of surface embossed portions 27, and a plurality of non-embossed portions 29. Each of the plurality of non-surface embossed portions 25 is an embossed portion formed by embossing the absorbent body 9 as a constituent member, and the absorbent body 9 is embossed and the liquid-permeable sheet 3 is not embossed. The plurality of surface embossed portions 27 are each an embossed portion formed by embossing the liquid-permeable sheet 3 and the absorbent body 9 as a constituent member. The plurality of non-embossed portions 29 are portions of the absorbent body 9 as a constituent member which are not embossed, and are portions of the overlapped region 23 other than the non-surface embossed portions 25 and the surface embossed portions 27.

The plurality of non-surface embossed portions 25 each include an inclined portion 19 and a bottom portion 21 on the skin-side surface 11 of the absorbent body 9 as a constituent member.

The overlapping region 23 where the absorbent article 1 overlaps with the absorber 9 in the thickness direction T includes a1 st colored portion 31 and a2 nd colored portion 33. The 2 nd colored portion 33 has the same hue as the 1 st colored portion 31 and has a darker hue than the 1 st colored portion 31. The 1 st colored portion 31 and the 2 nd colored portion 33 can be visually recognized from the outside of the absorbent article 1 in the developed state of the absorbent article 1 through the liquid-permeable sheet 3.

The 1 st colored portion 31 is disposed on the inclined portion 19 of each of the plurality of non-embossed portions 29 and each of the plurality of non-surface embossed portions 25, and the 2 nd colored portion 33 is disposed on the bottom portion 21 of each of the plurality of non-surface embossed portions 25.

Specifically, a1 st printed portion (light blue) having a B (blue) color is formed on the entire surface of the core layer 17 of the absorbent body 9 on the liquid-permeable sheet 3 side, and a2 nd printed portion (blue) having a B (blue) color is formed on a portion of the core layer 17 corresponding to the bottom portion 21 of each of the plurality of non-surface embossed portions 25. The 2 nd printing portion (blue) has a darker hue than the 1 st printing portion (light blue). The 1 st coloring portion 31 is constituted by the 1 st printing portion (light blue), and the 2 nd coloring portion 33 is constituted by the 2 nd printing portion (blue) and the 1 st printing portion (light blue).

The 1 st colored portion 31 in the inclined portion 19 of each of the plurality of non-embossed portions 29 and each of the plurality of non-surface embossed portions 25 and the 2 nd colored portion 33 in the bottom portion 21 of each of the plurality of non-surface embossed portions 25 can be visually recognized through the liquid-permeable sheet 3, and the color difference therebetween is 3.25 or more. This makes it easy for the user to visually recognize the depth of the non-surface embossed portion 25.

As shown in fig. 2, the liquid-permeable sheet 3 is separated from the bottom 21 of each of the plurality of non-surface embossed portions 25 in the thickness direction T. Thus, the colorant constituting the 2 nd colored portion 33 disposed on the bottom portion 21 of the non-surface embossed portion 25 is less likely to move toward the user.

Fig. 5 is a view for explaining an absorbent article 1 according to another embodiment of the present disclosure (hereinafter referred to as "embodiment 2"), specifically, a partial enlarged view of fig. 3 corresponding to the absorbent article 1 according to embodiment 1. In the absorbent article 1 according to embodiment 2, the configuration of the 1 st colored portion 31 and the 2 nd colored portion 33 has portions different from those of the absorbent article 1 according to embodiment 1, and therefore, only the portions different from those of the absorbent article 1 according to embodiment 2 will be described, and the portions identical to those of the absorbent article 1 according to embodiment 1 will not be described.

In the absorbent article 1 of embodiment 2, the 1 st colored portion 31 is composed of a non-pressure-sensitive colorant, and the 2 nd colored portion 33 is composed of a non-pressure-sensitive colorant and a colored pressure-sensitive colorant. Specifically, a printed portion (1 st printed portion, light blue) having a B (blue) color as a non-pressure-sensitive colorant is formed on the entire surface of the core layer 17 of the absorber 9 on the liquid-permeable sheet (not shown) side, and a pressure-sensitive colorant capable of developing blue is applied thereon. When the plurality of non-surface embossed portions 25 are formed on the absorber 9, the above-mentioned pressure-sensitive colorant is developed, and the 2 nd colored portion 33 composed of a non-pressure-sensitive colorant (light blue) having a B (blue) hue and a developed pressure-sensitive colorant (blue) having a B (blue) hue is formed on the bottom portion 21 of each of the plurality of non-surface embossed portions 25.

If the pressure-sensitive colorant is developed by embossing the constituent member including the absorbent body 9, the pressure-sensitive colorant is difficult to develop uniformly due to the flexibility of the pulp fibers and the like contained in the absorbent body, and the developed pressure-sensitive colorant has non-developed portions 35 where the pressure-sensitive colorant is not developed and spot-like developed portions 37 where the pressure-sensitive colorant is developed in spots, as shown in fig. 5. The spotted color developing part 37 may feel a feeling similar to that of the dense phobia depending on the person.

Further, the non-color-developing portion 35 is colored with a printing portion (1 st printing portion, light blue) belonging to a B (blue) hue as a non-pressure-sensitive colorant.

In the absorbent article 1 according to embodiment 2, since the liquid-permeable sheet 3 is disposed on the bottom section 21 of each of the plurality of non-surface embossed sections 25 in which the 2 nd colored section 33 is disposed, the liquid-permeable sheet 3 functions like ground glass, and therefore, the 2 nd colored section 33, specifically, the spotted colored section 37 and the non-colored section 35 of the bottom section 21 can be visually recognized substantially uniformly through the liquid-permeable sheet 3.

Further, since the liquid-permeable sheet 3 is separated from the bottom portion 21 of each of the plurality of non-surface embossed portions 25 in which the 2 nd colored portion 33 is arranged, the liquid-permeable sheet 3 can further function as a ground glass.

In the absorbent article 1 according to embodiment 2, the 3 rd colored portion 39 having the same hue as the 2 nd colored portion 33 and having a darker hue than the 2 nd colored portion 33 is disposed in the surface embossed portion 27, particularly in the bottom portion of the surface embossed portion 27. This is because the basis weight of the absorbent core 15 of the absorbent body 9 is low in the surface embossed portion 27, the pressure-sensitive colorant is easily developed when the surface embossed portion 27 is formed, and the liquid-permeable sheet 3 is embossed in the surface embossed portion 27, so that the color of the 3 rd colored portion 39 is easily transmitted by the liquid-permeable sheet 3 (it is difficult to exhibit the function of ground glass).

The absorbent article of the present disclosure includes a liquid-permeable sheet, a liquid-impermeable sheet, and a constituent member disposed therebetween, the constituent member having a skin-side surface and including an absorbent body. Examples of the member constituting the above-mentioned constituent member include an absorbent body and an auxiliary sheet. The auxiliary sheet may be, for example, a sheet arranged on the liquid-permeable sheet side of the absorber, such as a diffusion sheet, or may be a sheet arranged on the liquid-impermeable sheet side of the absorber, such as a diffusion sheet.

Examples of the absorbent body include an absorbent core and a core cover covering the absorbent core (for example, a liquid-permeable sheet-side core cover on the liquid-permeable sheet side, a liquid-impermeable sheet-side core cover on the liquid-impermeable sheet side, and the like), and an absorbent sheet.

Examples of the components constituting the absorbent core include pulp fibers, polymeric absorbent particles, and mixtures thereof. In the above mixture, the pulp fibers and the polymeric absorbent particles may not be uniform.

Examples of the core-covering layer and the absorbent sheet include crepe paper, air-laid pulp, wet crepe paper, and nonwoven fabrics as liquid-permeable sheets in this specification.

The absorbent article of the present disclosure may further include an additional member between the liquid-permeable sheet and the constituent member or between the liquid-impermeable sheet and the constituent member. As the additional member, for example, a diffusion sheet is exemplified.

In the absorbent article of the present disclosure, when the absorbent article is simply referred to as "embossed portion", the embossed portion refers to an embossed portion in which the constituent member is embossed and the liquid-permeable sheet is not embossed. The absorbent article of the present disclosure may have, in addition to the embossed portions, embossed portions for embossing only the liquid-permeable sheet, embossed portions for embossing the liquid-permeable sheet and the constituent member, and the like.

In the absorbent article of the present disclosure, the non-embossed portion refers to a portion of the above-described constituent member that is not embossed.

The absorbent article of the present invention includes a1 st colored portion which is visually recognizable through a liquid-permeable sheet, and a2 nd colored portion which has the same or adjacent hue as the 1 st colored portion and has a dark hue. The "same or adjacent hues" and "dark hues" are as described above.

The phrase "visually recognizable" through the liquid-permeable sheet means that the 1 st colored portion and the 2 nd colored portion have different colors from the liquid-permeable sheet, respectively, and can be visually recognized through the liquid-permeable sheet.

In the absorbent article of the present invention, the 1 st colored portion is disposed in the non-embossed portion of the constituent member, and the 2 nd colored portion is disposed in the bottom portion of the embossed portion.

In the absorbent article of the present invention, the 1 st colored portion or the 2 nd colored portion, or the intermediate colored portion having a color between the color of the 1 st colored portion and the color of the 2 nd colored portion may be disposed in the inclined portion of the embossed portion. Thus, the user can easily visually recognize the depth of the embossed portion.

In the absorbent article of the present disclosure, the color difference between the 1 st colored portion and the 2 nd colored portion (hereinafter, sometimes referred to as "1 st color difference") measured across the liquid-permeable sheet is 3.25 or more, preferably 5.0 or more, and more preferably 8.0 or more. This makes it easy for the user to feel the depth of the embossed portion.

In the absorbent article of the present disclosure, the 1 st color difference is preferably 55 or less, more preferably 40 or less, and further preferably 20 or less. This makes it easy for the user to feel a natural depth in the embossed portion.

The above-mentioned color difference is measured as follows.

(1) An X-Rite eXact Stander (measuring diameter: 1.5mm) manufactured by X-Rite Co was prepared.

(2) The CIE L a b coordinates of the portion to be measured of the sample of 10 points or more were measured with the displacement changed, and the average value thereof ([ L1, a1, b1 ]) was calculated.

(3) The coordinates of the portions to be compared of 10 or more samples were measured with the displacement changed, and the average thereof ([ L2, a2, b2 ]) was calculated.

(4) The color difference Δ E is calculated by the following formula:

[ formula 1]

In addition, from the viewpoint that the 1 st colored portion can be visually recognized through the liquid-permeable sheet, the color difference between the 1 st colored portion and the liquid-permeable sheet itself (hereinafter, may be referred to as "2 nd color difference") measured through the liquid-permeable sheet is preferably 1 or more, more preferably 3 or more, and further preferably 5 or more. This makes it easy for a user, such as a wearer or a caregiver to visually recognize the depth of the embossed portion of the component member through the liquid-permeable sheet.

In the absorbent article of the present disclosure, the 2 nd color difference is preferably 30 or less, more preferably 20 or less, and further preferably 10 or less. This makes it easy for the user to feel a natural depth in the embossed portion.

The 2 nd color difference can be measured in the same manner as the 1 st color difference, and the CIE L a b coordinates of the liquid-permeable sheet itself is the CIE L a b coordinates of a laminate in which 5 liquid-permeable sheets are stacked.

In the absorbent article of the present disclosure, materials known in the art can be used for the liquid-permeable sheet without particular limitation, and examples thereof include a nonwoven fabric and an apertured film having a plurality of apertures. Examples of the nonwoven fabric include a through-air nonwoven fabric, a spunbond nonwoven fabric, a point-bond nonwoven fabric, a spunlace nonwoven fabric, a needle-punch nonwoven fabric, a meltblown nonwoven fabric, and a combination thereof (e.g., SMS nonwoven fabric).

The nonwoven fabric and the apertured film may contain a pigment for adjusting the light transmittance.

The nonwoven fabric can function as ground glass because light is diffusely reflected on the surface of the fibers constituting the nonwoven fabric.

Since light is diffusely reflected at the plurality of open holes, the open hole film can function like ground glass. In addition, the apertured film usually contains a pigment in order to make the film itself translucent or opaque, and light is diffusely reflected by the pigment, so that the portion of the pigment can function as ground glass.

The basis weight of the liquid-permeable sheet may be any one known in the art, and is preferably 8 to 150g/m²More preferably 10 to 100g/m²More preferably 15 to 30g/m²Basis weight of (c).

The liquid-permeable sheet has a light transmittance of preferably 20 to 95%, more preferably 30 to 92%, and still more preferably 45 to 89%. This makes it easy for the user to visually recognize the 1 st colored portion and the 2 nd colored portion formed in the constituent member. In addition, the liquid-permeable sheet easily functions like ground glass.

The light transmittance is measured according to JIS K7361-1: 1997 method for testing the total light transmittance of a plastic-transparent material, part 1: single beam method "for measurement. The measuring apparatus may be a turbidimeter NDH-300A manufactured by Nippon Denshoku industries, Ltd.

In the absorbent article of the present disclosure, the liquid-permeable sheet may be disposed so as to be in contact with the bottom portion of the embossed portion in the thickness direction of the absorbent article, but is preferably disposed so as to be spaced apart from the bottom portion of the embossed portion. This is because the colorant constituting the 2 nd colored portion disposed at the bottom of the embossed portion is difficult to move toward the user. Further, even in the case where the pressure-sensitive colorant has a spotted colored portion at the bottom of the embossed portion, the liquid-permeable sheet has a function like ground glass, and therefore, the spotted colored portion at the bottom can be visually recognized substantially uniformly through the liquid-permeable sheet, and therefore, the user is less likely to feel a sensation similar to that of fear syndrome.

In the case where the pressure-sensitive colorant has a spot-like colored portion at the bottom of the embossed portion, examples thereof include (i) a case where the absorbent body included in the constituent member is soft due to pulp fibers or the like and the pressure-sensitive colorant is difficult to be uniformly colored, (ii) a case where the absorbent body included in the constituent member contains polymer absorbent particles and the pressure-sensitive colorant is strongly colored in a region in contact with the polymer absorbent particles, and (iii) a case where the pressure-sensitive adhesive is applied to the constituent member by, for example, spray coating in a nonuniform manner (for example, in a spot-like manner).

In the absorbent article of the present disclosure, the 1 st colored portion and the 2 nd colored portion can be colored portions well known in the art, and can be formed of, for example, a non-pressure-sensitive colorant (e.g., a dye, a pigment, etc.), a pressure-sensitive colorant, or the like.

Examples of the pressure-sensitive coloring agent include a mixture of a capsule (for example, a polyurethane resin capsule) in which an electron-donating color-developing agent (for example, crystal violet lactone, benzoyl leuco methylene blue, or the like) is encapsulated and an electron-accepting color-developing agent (for example, activated clay, a phenol-formaldehyde condensate, a polyvalent metal salt of an aromatic carboxylic acid, or the like).

In the absorbent article of the present disclosure, in the case where the above-mentioned constituent member contains the non-pressure-sensitive colorant and the pressure-sensitive colorant, the pressure-sensitive colorant preferably has a hue identical to or adjacent to that of the non-pressure-sensitive colorant in color development and has a dark hue. This is from the viewpoint of the relationship to be satisfied by the 1 st colored portion and the 2 nd colored portion.

In the absorbent article of the present disclosure, the 1 st colored portion can be formed of a colorant known in the art, for example, the 1 st colored portion can be formed of a non-pressure-sensitive colorant, a colored pressure-sensitive colorant, and a combination thereof.

In the absorbent article of the present disclosure, the 2 nd colored portion can be formed of a colorant known in the art. In the absorbent article of the present invention, it is preferable that the 2 nd colored portion contains a colored pressure-sensitive colorant. The 2 nd coloring part may be composed of only the pressure-sensitive coloring agent that develops color, or may be composed of a coloring agent other than the pressure-sensitive coloring agent that develops color and a coloring agent other than the pressure-sensitive coloring agent, for example, a non-pressure-sensitive coloring agent. This is because the 2 nd colored portion can be easily formed by forming the embossed portion.

In the absorbent article of the present disclosure, for example, in the case where the above-described constituent member contains a non-pressure-sensitive colorant and a pressure-sensitive colorant in both the embossed portion and the non-embossed portion, the 1 st colored portion may be composed of a non-pressure-sensitive colorant (and a pressure-sensitive colorant that does not develop color), the 2 nd colored portion may be composed of a non-pressure-sensitive colorant and a pressure-sensitive colorant that develops color, the 1 st colored portion may be composed of a non-pressure-sensitive colorant and a pressure-sensitive colorant that develops color weakly, and the 2 nd colored portion may be composed of a non-pressure-sensitive colorant and a pressure-sensitive colorant that develops color strongly (a pressure-sensitive colorant that develops color weakly than the 1 st colored portion).

In the absorbent article of the present disclosure, for example, in the case where the above-described constituent member contains only the pressure-sensitive colorant in both the embossed portion and the non-embossed portion, the 1 st colored portion may be composed of a weakly colored pressure-sensitive colorant, and the 2 nd colored portion may be composed of a strongly colored pressure-sensitive colorant (a weakly colored pressure-sensitive colorant that is stronger than that of the 1 st colored portion).

In the absorbent article of the present disclosure, the absorbent body preferably includes an absorbent core containing polymeric absorbent particles in an amount of preferably 30% by mass or more, more preferably 40% by mass or more, and still more preferably 50% by mass or more. This is because the liquid-permeable sheet is less likely to break in the vicinity of the embossed portion, and the polymer absorbent particles are less likely to leak to the outside of the absorbent article.

The absorbent article of the present disclosure is not particularly limited as long as the effect of the present disclosure can be exerted, and examples thereof include disposable diapers, urine pads, incontinence pads, sanitary napkins, panty liners, pet sheets, bed sheets, and the like.

[ method for producing absorbent article ]

The method for manufacturing an absorbent article of the present disclosure (hereinafter, sometimes referred to as "the method for manufacturing the present disclosure") includes the following steps.

Step of preparing a constituent member containing a pressure-sensitive colorant (hereinafter, sometimes referred to as "preparation step")

A step of forming an embossed portion in the above-described constituent member (hereinafter, sometimes referred to as "embossed portion forming step")

A step of laminating the liquid-permeable sheet on the structural member having the embossed portion (hereinafter, may be referred to as "laminating step")

In the above preparation step, a constituent member containing a pressure-sensitive colorant is prepared.

The constituent members, the non-pressure-sensitive coloring agent, and the pressure-sensitive coloring agent are as described in the "absorbent article", and therefore, the description thereof is omitted.

The preparation step described above can include, for example, a step of applying a pressure-sensitive colorant on a member constituting the constituent member, for example, a core coat layer (hereinafter, sometimes referred to as "application step"). In addition, the constituent member may further contain a non-pressure-sensitive coloring agent, and in the coating step, the pressure-sensitive coloring agent and the non-pressure-sensitive coloring agent may be coated on the constituent member, for example, a core coat layer.

In the case where the above-mentioned constituent member further contains a non-pressure-sensitive colorant, in the above-mentioned coating step, the non-pressure-sensitive colorant and the pressure-sensitive colorant can be applied to the constituent member, for example, the core coat layer, either individually or simultaneously, and in the case where the non-pressure-sensitive colorant and the pressure-sensitive colorant are applied individually, the order of coating is arbitrary.

The coating machine used in the coating step can be a coating machine known in the art, and the description thereof is omitted.

In the embossed portion forming step, an embossed portion is formed in the constituent member. By forming an embossed portion on the above-mentioned constituent member, the pressure-sensitive colorant is developed at the bottom of the embossed portion, and a2 nd colored portion containing the developed pressure-sensitive colorant is formed at the bottom of the embossed portion. For example, in the case where the above-mentioned constituent member contains only the pressure-sensitive colorant in the region where the 2 nd colored portion is to be formed, the 2 nd colored portion is composed of only the pressure-sensitive colorant that develops color, and in the case where the above-mentioned constituent member contains the pressure-sensitive colorant and the non-pressure-sensitive colorant in the region where the 2 nd colored portion is to be formed, the 2 nd colored portion is composed of the pressure-sensitive colorant and the non-pressure-sensitive colorant that develop color.

In the case where the above-described constituent member contains a pressure-sensitive colorant in the region where the 1 st colored portion is to be formed (the region where the non-embossed portion is to be formed), the production method of the present disclosure can include a step of developing the pressure-sensitive colorant in the region where the 1 st colored portion is to be formed (hereinafter, sometimes referred to as "developing step"). The developing step may be, for example, a step of pressing the constituent members under a pressure weaker than the pressure at the time of forming the embossed portion and capable of developing the color of the pressure-sensitive color developer.

In the laminating step, the liquid-permeable sheet is laminated on the component member having the embossed portion. The liquid-permeable sheet is as described in the "absorbent article", and therefore, the description thereof is omitted here.

Further, the inclined portion of the embossed portion may have a1 st colored portion, a2 nd colored portion, or an intermediate colored portion having a color between the color of the 1 st colored portion and the color of the 2 nd colored portion. For example, in the case where the above-mentioned constituent member contains a pressure-sensitive coloring agent and a non-pressure-sensitive coloring agent, and the embossed portion is formed at a weak pressure by an embossing device having a pair of embossing rollers known in the art, the 1 st colored portion in which the pressure-sensitive coloring agent is not developed can be formed in the inclined portion of the embossed portion. In addition, when the embossing portion is formed under a strong pressure by an embossing device having a pair of emboss rollers known in the art, the 2 nd colored portion in which the pressure-sensitive colorant is colored can be formed in the inclined portion of the embossing portion, similarly to the bottom portion. In addition, when the embossing portion is formed with a moderate pressure by an embossing device having a pair of embossing rollers known in the art, an intermediate colored portion that develops color to some extent with the pressure-sensitive colorant can be formed in the inclined portion of the embossing portion.

Since the description of the other parts is given in the above "absorbent article", the description thereof will be omitted.

[ use of nonwoven Fabric or apertured film as a permeability-adjusting Member ]

In addition, the present disclosure relates to the use of a nonwoven fabric or an apertured film as a permeability adjusting member.

The use of the present invention is a use of a nonwoven fabric or an apertured film as a permeability adjusting member for adjusting the permeability of a colored portion formed in a constituent member including an absorbent body, wherein the colored portion has a dot-shaped colored portion in which a pressure-sensitive colorant is colored in a dot shape.

In the use of the present disclosure, examples of the nonwoven fabric or the apertured film include the nonwoven fabric or the apertured film described as the liquid-permeable sheet in the "absorbent article".

In the use of the present disclosure, the nonwoven fabric or the apertured film may also be separated from the spotted colored portion. This allows the nonwoven fabric or the apertured film to function as a permeability adjusting member.

The nonwoven fabric or the apertured film has a light transmittance of preferably 20 to 95%, more preferably 30 to 92%, and still more preferably 45 to 89%. This allows the user to easily perform the function of the ground glass while visually recognizing the colored portion formed on the constituent member.

The colored portion is not particularly limited as long as it has a dot-shaped colored portion in which the pressure-sensitive colorant is colored in a dot shape, and may contain a non-pressure-sensitive colorant.

In the use of the present disclosure, the pressure-sensitive coloring agent, the spotted color developing portion, and the like are as described in the "absorbent article", and therefore the description thereof is omitted.