JP2005111748A - Absorbent sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent sheet made inconspicuous in its presence even if worn on all of clothes, having no feeling of physical disorder and having a good impression. <P>SOLUTION: This absorbent sheet 1 is composed of a laminated sheet 1A including a surface sheet 2 having liquid permeability and a leakproof sheet 3 having liquid impermeability. The laminated sheet 1A is constituted so as to see through the color of clothes 10 from the side of the surface sheet 2 in a case mounted on the clothes 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention absorbs bodily fluids while being worn on clothes such as underwear, shirts, and blouses, such as a cage sheet, panty liner, urine leakage sheet, sweat pad, neck pad, breast milk pad, etc. More particularly, the present invention relates to a thin absorbent sheet.

This type of absorbent sheet is used when a small amount of bodily fluid is excreted, and absorbs bodily fluid while it is attached to the inner surface of clothes such as underwear.
By the way, in recent years, the absorbent sheets are known to be colored in several colors such as blue, pink, mocha, black, etc. A technique is disclosed in which the color of the absorbent sheet is not conspicuous with respect to the color of the clothes when the clothes are taken off (see, for example, Non-Patent Document 1).

“Sophie Color Liner”, [on line], Unicharm, [searched July 24, 2003], Internet <URL: http://www.unicharm.co.jp/newpro/color/>

There are various colors, patterns, and textures in clothes, and the absorbent sheet disclosed in Non-Patent Document 1 has a limit in making the color of the absorbent sheet inconspicuous with respect to the color of clothes.
Accordingly, an object of the present invention is to provide an absorbent sheet that does not stand out even when worn on any garment, has no sense of incongruity, and has good impression.

  The inventors have led to the idea that if the entire absorbent sheet is made transparent rather than making the color of the absorbent sheet similar to the color of the clothes, its presence will be inconspicuous for all clothes, for example, It has been found that the entire absorbent sheet can be made transparent by means such as making the amount of the colorant contained in the surface layer, the leak-proof layer or the like constant or less.

  The present invention has been made on the basis of the above knowledge, and includes a laminated sheet including a liquid-permeable and liquid-retaining surface layer and a liquid-impervious leak-proof layer, and the laminated sheet is a garment. The above object is achieved by providing an absorbent sheet configured to show the color of the garment from the surface layer side.

The “back black lightness L _B ” defined in the present application refers to the lightness L value indicated by the absorbent sheet with the standard black plate on the back in the Lab color system, and the value is small in the range of 0 to 100. The closer to the L value of the standard black plate, the higher the transparency of the absorbent sheet.
The “back white lightness L _W ” defined in the present application refers to the lightness L value indicated by the laminated sheet with the standard white plate on the back surface, and the value is large in the range of 0 to 100, The closer to the L value, the higher the transparency of the absorbent sheet.
In general, the lower “back black lightness L _B ” means blacker, the surface includes black articles, and the higher “back white lightness L _W ” means whiter. And articles having a white surface. However, those satisfying the two brightness levels defined by the present application indicate an article having a high transparency.

  According to the present invention, since the entire absorbent sheet can be made transparent by making both the surface layer and the leak-proof layer transparent, the presence of the absorbent sheet is conspicuous even when worn on any clothing. The impression can be improved without any discomfort.

Hereinafter, a most preferred embodiment of the water absorbent sheet of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1 or FIG. 2, the water-absorbent sheet 1 of this embodiment includes a liquid-permeable surface sheet (surface layer) 2 and a liquid-impermeable leak-proof sheet (leak-proof layer) 3. A laminated sheet 1A is provided, and when the laminated sheet 1A is attached to the garment 10, the color of the garment 10 is seen through from the surface sheet 2 side.
The top sheet 2 is made of one or more non-woven fabrics having a colorant content of 2% or less, and the leak-proof sheet 3 is made of a film having a colorant content of 2% or less. Details of the absorbent sheet 1 will be described.

  The absorbent sheet 1 of the present embodiment has a structure in which a surface layer made of one or a plurality of surface sheets 2 (2A, 2B...) And a leak-proof layer made of a leak-proof sheet are laminated, in a thin sheet shape. Is formed.

  The surface layer has a multilayer structure of 1 to 3 surface sheets 2 (2A, 2B...) From the viewpoint of maintaining a balance between ensuring liquid retention as well as liquid permeability and ensuring transparency. It is preferable that several intermediate layers to lower layers function as an absorption layer. In this case, the nonwoven fabric used for the surface sheet 2 may be the same type or different types. Moreover, in the surface sheet 2A located in the uppermost layer in the surface layer, a plurality of holes are formed and arranged from the viewpoint of improving liquid permeability.

  The leak-proof layer is preferably composed of a single leak-proof sheet 3 from the viewpoint of ensuring liquid impermeability and transparency, but is located at the bottom layer of the leak-proof sheet 3 and the surface layer. You may make it a two-layer structure with a nonwoven fabric or another nonwoven fabric.

The topsheet 2 is made of, for example, a nonwoven fabric composed of fibers made of a thermoplastic resin such as a polyolefin such as polyethylene or polypropylene, a polyester such as polyethylene terephthalate, or a polyamide such as nylon, or two or more types of composite fibers of the above fibers. It is a non-woven fabric that is configured, and its fineness is preferably 1.8 to 3.6 dtex.
The uppermost surface of the surface sheet 2 may be a nonwoven fabric exhibiting high hydrophilicity and flexibility, such as a rayon spunlace nonwoven fabric. In this case, the fineness is 1.8 to 3.6 dtex. Is preferred.

The basis weight per sheet of nonwoven fabric, flexibility to function as a cushion, and from the viewpoint of ensuring sufficient clarity, a 12~80g / m ^2, it is particularly 14~40g / m ² preferable. The thickness of the nonwoven fabric per sheet is 0.1 to 1 mm, and particularly preferably 0.2 to 0.6 mm.

In addition, it is preferable to give a hydrophilic treatment to a nonwoven fabric from a viewpoint of an absorptivity, and this point is demonstrated below.
The hydrophilic treatment on the surface of the nonwoven fabric has a function of actively absorbing a small amount of bodily fluid like a cage and not leaving it on the surface of the human body. Since the water-absorbent sheet of this embodiment does not absorb a large amount of body fluid like a sanitary napkin or a paper diaper, it does not necessarily require a hydrophilization treatment. In order to ensure, it is preferable to perform a hydrophilic treatment.
In particular, when the surface layer is composed of a single non-woven fabric, the non-woven fabric preferably has a structure in which bodily fluids are easily transferred from the skin contact surface side to the back side. Such a structure is realized by making the back side larger than the skin contact surface side in terms of capillary force. (1) The fibers on the back side are stronger and more hydrophilic than the fibers on the skin contact surface side. (2) The fiber on the back side is made thinner than the fiber on the skin contact surface side. As for a specific manufacturing method of such a structure, in the non-woven fabric forming step, a fiber web having two layers is prepared in advance. Is treated with a strongly hydrophilic hydrophilizing agent, or the amount of hydrophilizing agent adhering to the fiber on the back side is increased, and in (2) above, the fiber used for the fiber web on the back side is made thinner. .
Even if the nonwoven fabric having the above structure is a single sheet, it exhibits both “liquid permeability” and “liquid retention”.

The amount of the colorant contained in the nonwoven fabric is 2% by weight or less. Examples of the colorant include titanium oxide (TiO ₂ ), calcium carbonate (CaCO ₃ ), barium sulfate (BaSO ₄ ), and the like. It is done.
In particular, titanium oxide is mainly used as a white pigment, and when it is contained in a nonwoven fabric, it exhibits high whiteness, large shielding power, etc. In the case of this embodiment, the transparency of the nonwoven fabric itself is increased. From the viewpoint, the content of titanium oxide in the nonwoven fabric is preferably 0 to 2% by weight, particularly preferably 0 to 0.5% by weight.
In particular, when the absorbent sheet has a plurality of surface sheets 2 (2A, 2B...), The content of titanium oxide is 0.5% by weight or less other than the outermost surface sheet, and the outermost surface sheet is also 2% by weight or less. More preferably, it is 0.5% by weight or less from the viewpoint of maintaining transparency.
In addition, from the same viewpoint as described above, the nonwoven fabric does not contain as much as possible fibers made of fibers that are opaque (white) in a normal state, such as paper (absorbing paper), cotton, and pulp.

  For fusion of nonwoven fabrics, the spunbond method, air-through method, heat roll method, spunlace method, etc. are used. In particular, from the viewpoint of suppressing irregular reflection between fibers by bringing the nonwoven fabric fibers into close contact with each other, Alternatively, it is preferable to use a heat roll method.

  For bonding the non-woven fabrics, hot melt bonding or heat sealing (embossing) and a combination thereof are used. Spiral spray, multi-row bead, slot spray, thin film, etc. are used for hot melt adhesion, but in the same way as above, a melt pattern (spiral, slot, thin film) that adheres to the entire surface is good to suppress irregular reflection between fibers, From the viewpoint of absorbability, a pattern with appropriate gaps is good (spiral, multi-row bead). In addition, a pattern having an appropriate gap is excellent in that it has an effect of not reducing the overall transparency. From the above points, the spiral spray method is preferable. Further, as will be described later, it is more preferable to improve the adhesion of the nonwoven fabric by using a heat seal (emboss) in combination.

  For the non-woven fabric adhesive 4 (4A, 4B), a styrene-butadiene-styrene (SBS) system, a styrene-ethylene-butadiene-styrene (SEBS) system, an olefin hot melt, or the like is used. From the viewpoint of enhancing the transparency between the layers of the sheet 2, the content of titanium oxide in the adhesive 4 is preferably 0 to 0.5% by weight.

In addition, it is preferable that the coating amount of the adhesive agent 4 is 3-15 g / m < ² > from a viewpoint of maintaining the balance of ensuring sufficient joining force of nonwoven fabrics, and ensuring the transparency between lamination | stacking of a nonwoven fabric. . This coating amount is the same for the adhesive 4 (4C) described later.

  At least one non-woven fabric of the surface sheet 2 described above includes, for example, oil and fat agents (oil and fat components) such as chamomile extract and various essential oil-containing vegetable oils, or lotion agents (viscous components) such as glycerin and the like. It is also preferable to impregnate. Such oils or lotions are inherently (1) improving the flexibility of the product, (2) improving the smoothness of the product surface, (3) preventing the skin irritation of the wearer, etc. Although it is used in a small amount for this purpose, it exhibits the function of filling the fiber gaps in the nonwoven fabric and suppressing the irregular reflection between the fibers to make it transparent. The entire absorbent sheet 1 may be impregnated with an oil or lotion agent.

The leak-proof sheet 3 is a liquid-impermeable film made of thermoplastic resin such as polyethylene, polyvinyl acetate, or polyolefin resin such as ethylene-vinyl acetate copolymer or polyethylene-polyvinyl acetate composite film. It is also possible to use a normal polyethylene film that does not contain a colorant. It is also preferable to make the film porous and have moisture permeability.
From the viewpoint of high transparency, the basis weight per film is 15 to 50 g / m ² , and the thickness per film is preferably 0.05 to 0.4 mm. In addition, when it has moisture permeability, the moisture permeability of the film is preferably 1.0 to 2.5 g / (100 cm ² · 24 hr).

The leak-proof sheet 3 is the same as the top sheet 2 except that the amount of the colorant contained in the film is 2% by weight or less, more preferably 0.5% by weight or less. As above, titanium oxide (TiO ₂ ), calcium carbonate (CaCO ₃ ), barium sulfate (BaSO ₄ ) and the like can be mentioned.
In particular, the titanium oxide content is more preferably 0.5% by weight or less from the viewpoint of high transparency.
Here, in general, a porous moisture-permeable sheet is frequently used by those skilled in the art. In this moisture-permeable sheet, a large amount of incompatible inorganic powder such as calcium carbonate (CaCO ₃ ) is contained in the base film. When dispersing and stretching the base film, fine separations (holes) are formed at the interface between the powder and the resin, and the fine holes serve as water vapor discharge holes. Such a moisture permeable film contains a large amount of pigment and makes the film itself turbid due to diffused reflection of light in the micropores themselves, and thus is inappropriate as a leak-proof sheet of this embodiment.
Therefore, a film made of a polyester-based elastomer is used for the leak-proof sheet 3 from the viewpoint of ensuring a moisture permeability function while ensuring transparency. The resin constituting this film has the property of selectively releasing water vapor taken into the film to the outside due to high molecular mobility in the amorphous part and high hydrophilicity, The film has transparency and moisture permeability.

  Adhesion between film and non-woven fabric is achieved by slot spray method, spiral spray method, thin film coating, etc., olefin hot melt, styrene-butadiene-styrene (SBS), styrene-ethylene-butadiene-styrene (SEBS), etc. Adhesive 4 (4C) is used. The content of titanium oxide in the adhesive 4 (4C) is preferably 0 to 0.5% by weight as in the case of the adhesive 4 (4A, 4B) between the nonwoven fabrics.

The laminated sheet 1A formed by laminating the surface sheet 2 and the leak-proof sheet 3 described above is integrally joined by an embossing process by heat sealing or the like. The bonded area ratio in the plan view of the laminated sheet 1A is preferably 15 to 50% from the viewpoint of bringing the fibers of the non-woven fabric into close contact with each other to reduce the voids and suppressing irregular reflection between the fibers.
A bonding area ratio of the laminated sheet 1A by embossing of 15% or more is preferable because the visual impression of a highly transparent region of the embossed portion is strengthened and the whole becomes a very transparent impression. On the other hand, from the viewpoint of overall softness and absorbability, the bonding area ratio is preferably 50% or less, and more preferably 30% or less.
Also, the embossing is preferably a discrete pattern such as a dot shape or a small circle shape so as not to increase the hardness of the entire sheet. In particular, a pattern in which a circular dot having a diameter of 2 mm or less covers the entire surface is transparent and flexible. It is preferable from the viewpoint of compatibility.

  On the back surface of the laminated sheet 1A (the outer surface of the leak-proof sheet 3), an adhesive 5 for fixing clothes (for wearing clothes) is affixed. This pressure-sensitive adhesive 5 has a titanium oxide content of 0 to 0.5% by weight, for example, in SEBS hot melt, and is covered with release paper, in the same manner as described for the adhesive 4. ing.

The total thickness of the laminated sheet 1A (absorbent sheet 1) is 0. From the viewpoint of maintaining a balance between the cushion feeling (softness) of the sheet and the absorption capacity and the transparency of the entire laminated sheet 1A. 3 to 2.5 mm is preferable.
From the viewpoint of ensuring the minimum absorbability and cushion feeling, the thickness of the laminated sheet 1A is preferably 0.3 mm or more, and more preferably 0.6 mm or more. Moreover, from a viewpoint of ensuring a transparent feeling, it is preferable that it is 2.5 mm or less, and it is more preferable that it is 2.0 mm or less.

In the present embodiment, the transparency (see-through effect or non-shielding property) of the laminated sheet 1A with an arbitrary garment 10 on the back is a physical property value using the above-defined back black lightness L _B and back white lightness L _W. Represented as:
From the viewpoint of recognizing transparency, the back black lightness L _B is preferably 0 to 20, and the back white lightness L _W is preferably 30 to 100. The back black lightness L _B is more preferably 2 to 15, and the back white lightness L _W is more preferably 70 to 100. The standard black plate has an L value of 0 to 5, and the standard white plate has an L value of 100. (The L value of the standard black plate used in the present embodiment was 4, and the L value of the standard white plate was 100.)

  As described above, according to the present embodiment, when the laminated sheet 1A is attached to clothes, the laminated sheet 1A is configured to show the color of clothes from the surface layer side. As a result, even if it is worn on any garment 10, the presence of the absorbent sheet 1 can be made inconspicuous, and the impression can be improved without any sense of incongruity.

  As long as the transparency of the absorbent sheet can be enhanced, the present invention is not limited to the above-described embodiment. For example, the amount of the colorant contained with respect to the adhesive that fixes the top sheet 2 and the leak-proof sheet 3 is 0.5. Although it is weight% or more, the surface sheet 2 may be impregnated with an oil or a lotion agent to suppress irregular reflection between fibers to enhance transparency and obtain an absorbent sheet having a transparency. Thus, the above-described transparency means is appropriately selected to produce the absorbent sheet.

Hereinafter, Examples 1 to 3 that make the absorbent sheet 1 of the above embodiment more specific will be described together with Comparative Example 1.
[Example 1]

Using the composite fiber, an air-through nonwoven fabric was obtained by an air-through method. This composite fiber is one in which titanium oxide is contained in a proportion of 0.5% by weight or less in a PET / PE resin having a fineness of 2.2 dtex. The basis weight of the air-through nonwoven fabric was 25 g / m ² .
A film was obtained by melt-extruding a pellet resin (“Flemer” manufactured by Nippon Synthetic Chemical Industry Co., Ltd.). This film does not contain titanium oxide and is transparent. This film had a basis weight of 20 g / m ² and a water vapor transmission rate of 2.0 g / (100 cm ² · 24 hr).

Both the air-through nonwoven fabric and the film were cut in a dimension of length 17 cm × width 7 cm. An olefinic hot melt adhesive (titanium oxide 0.5% by weight or less) is applied to this film by a slot spray method at a coating rate of 10 g / m ² , and an air-through nonwoven fabric is bonded to the film and laminated. A sheet was formed. Thereafter, the entire laminated sheet was heat sealed and then cut into a predetermined shape. The laminated sheet at this stage is obtained by laminating one air-through nonwoven fabric as a top sheet and one film as a leak-proof sheet.

On the release paper, four SEBS-based hot melt adhesives (not including titanium oxide) having a length of 100 mm and a width of 5 mm were applied as adhesives 5 for fixing clothes, and the back surface of the laminated sheet 1A (a leak-proof sheet 3). To the center of the outer surface), an absorbent sheet 1 of Example 1 was obtained. This absorbent sheet 1 had a thickness of 0.6 mm.
[Example 2]

A spunbond nonwoven fabric was obtained by a spunbond method using continuous long fibers. This continuous long fiber is a polypropylene-polyethylene resin having a fineness of 2.2 dtex and does not contain any titanium oxide. The basis weight of the spunbond nonwoven fabric was 14 g / m ^2.
To this spunbonded nonwoven fabric, 0.2% by weight of alkyl ether sulfate (anionic surfactant) was adhered and subjected to a hydrophilic treatment.

Two pieces of this spunbonded nonwoven fabric and one piece of the same film as in Example 1 were prepared, and each piece was cut into dimensions of 17 cm length × 7 cm width.
Between two spunbond nonwoven fabrics, an olefinic hot melt adhesive (titanium oxide 0.5 wt% or less) was applied by a spiral spray method at a coating rate of 5 g / m ² , The adhesive was applied between the films by a slot spray method at a coating rate of 10 g / m ² , and two non-woven fabrics and one film were laminated to form a laminated sheet. Furthermore, circular dot embossing with a pin diameter of 1.5 mm was applied to the entire laminated sheet.
Thereafter, as in Example 1, the whole was heat-sealed and then cut into a predetermined shape. The laminated sheet at this stage is obtained by laminating two spunbond nonwoven fabrics as a surface sheet and one film as a leak-proof sheet.
In addition, the bonding area ratio by this dot embossing was 25%.

An adhesive for fixing clothes was applied in the same manner as in Example 1 to obtain an absorbent sheet of Example 2. This absorbent sheet had a thickness of 0.45 mm.
[Example 3]

An absorbent sheet was obtained in the same manner as in Example 2 except that a polyethylene film (not including titanium oxide) having a basis weight of 30 g / m ² was used as the leak-proof sheet.
To this absorbent sheet, 0.5 g of a glycerin reagent (manufactured by Kanto Chemical Co., Ltd.) was added dropwise as a lotion agent to spread over the whole, and the absorbent sheet of Example 3 was obtained. This absorbent sheet had a thickness of 0.4 mm, and a bonding area ratio by heat sealing was 25%.
[Comparative Example 1]

As a conventional product, “Laurier Panty Liner (unscented)” manufactured by Kao Corporation was used as the absorbent sheet of Comparative Example 1. In this absorbent sheet, the nonwoven fabric contained 5% by weight of titanium oxide, and the film contained 50% by weight or more of calcium carbonate. Absorbent paper is included as an absorbent.
The absorbent sheet has a thickness of 2.1 mm, and the entire sheet is not joined by heat sealing.

[Evaluation test]
<Transparency (see-through effect) evaluation method>
The absorbent sheets of Examples 1 to 3 and Comparative Example 1 were selected as samples, respectively. A standard black plate is applied to the back surface of the absorbent sheet (adhesion-preventing adhesive material surface), and the lightness L value of the absorbent sheet in that state is measured by a spectral color difference meter (Nippon Denshoku Industries Co., Ltd., model: SE-2000). , Used lens: φ30 mm), and measured three times in the reflection mode, and the average value was defined as the back black lightness L _B.
Similarly, applying a standard white plate to the back of the absorbent sheet, the brightness L value of the absorbent sheet in this state was measured three times in reflection mode, and the average value was used as the back white lightness L _W.
The L value of the standard black plate was 4, and the L value of the standard white plate was 100.

<Sensitive (appearance / impression) evaluation method>
Five female monitors with experience using panty liners (absorbent sheets), two samples of each, and sanitary shorts ("Laurier Active Fit Up" manufactured by Kao Corporation, color: Silky Mocha) Then, the following appearance evaluation and impression evaluation were performed.
Appearance evaluation and impression evaluation were performed when the remaining samples were worn after each sample was worn for 2 hours. The wearing order of each sample was not specified.

<< Appearance evaluation >>
The evaluation of the appearance (color difference) of the panty liner was quantified based on the following criteria, and the average value was obtained. This numerical value indicates that the closer to 1 in the range of 1 to 4, there is no sense of discomfort in the appearance.
1 ... No discomfort 2 ... No discomfort 3 ... Slight discomfort 4 ... Discomfort

<< impression evaluation >>
The evaluation of the impression quality of the entire panty liner was quantified based on the following criteria, and the average value was obtained. This numerical value indicates that the closer to 1 in the range of 1 to 5, the better the impression.
1 ... Impressive 2 ... Slightly impressive 3 ... I can't say either 4 ... Slightly impression 5 ... Impressed

Table 1 shows the thickness, back black lightness L _B , back white lightness L _W , and sensory evaluation results of Examples 1 to 3 and Comparative Example 1.

[Evaluation results]
As shown in Table 1, if the back black lightness L _B is in the range of 0 to 20 and the back white lightness L _W is in the range of 30 to 100, the transparency of the absorbent sheet (see-through effect) Was generally good. In the order of Example 1 → Example 2 → Example 3, the back black lightness L _B becomes close to the L value of the standard black plate, and the back white lightness L _W becomes close to the L value of the standard white plate. Became high. This transparency became higher as the thickness of the absorbent sheet was smaller.

  As for the absorptive sheet of Examples 1-3, all the items of sensory evaluation (appearance evaluation and impression evaluation) are better than the absorptive sheet of Comparative Example 1, and Example 1 → Example 2 → Implementation In the order of Example 3, the appearance and impression were improved.

  The above evaluation results are as follows: (1) Do not contain titanium oxide in the surface sheet, leak-proof sheet, adhesive, etc. (2) Use a spunbond nonwoven fabric or the like for the surface sheet, and further increase the bonding area ratio by embossing. (3) By impregnating the surface sheet with the lotion agent, the fiber gap is filled with the lotion agent, and irregular reflection is suppressed. It became clear that it was caused.

It is a perspective view showing the absorptive sheet of this embodiment in the state where it stuck on clothes. It is sectional drawing which shows the outline of the laminated structure of the absorbent sheet of this embodiment.

Explanation of symbols

1A Laminated sheet 2, 2A, 2B, 2C Surface sheet (surface layer)
3 Leak-proof sheet (leak-proof layer)
4, 4A, 4B, 4C adhesive 5 pressure-sensitive adhesive L _B back black lightness L _W back white brightness

Claims (8)

  A laminated sheet including a liquid-permeable and liquid-retaining surface layer and a liquid-impermeable leak-proof layer, and when the laminated sheet is attached to clothes, the color of the clothes from the surface layer side Absorbent sheet configured to show through. The surface layer is made of one or more nonwoven fabrics having a colorant content of 2% or less,
The absorbent sheet according to claim 1, wherein the leak-proof layer is made of a film having a colorant content of 2% or less. 3. The absorbent sheet according to claim 1, wherein the laminated sheet has a back black lightness L _B of 0 to 20 and a back white lightness L _W of 30 to 100. 4.   The absorption according to any one of claims 1 to 3, wherein each of the surface layer and the leak-proof layer is fixed by an adhesive, and the adhesive has a colorant content of 0.5% or less. Sex sheet.   The outer surface of the leak-proof layer is provided with a pressure-sensitive adhesive for wearing clothes, and the pressure-sensitive adhesive has a colorant content of 0.5% or less. Absorbent sheet.   The absorptive sheet according to any one of claims 1 to 5, wherein the laminated sheet is integrally bonded and has a bonded area ratio in a plan view of 15% or more.   The absorbent sheet according to any one of claims 1 to 6, wherein at least one nonwoven fabric forming the surface layer is impregnated with an oil or fat component or a viscous component. The absorbent sheet according to any one of claims 1 to 7, wherein a thickness of the laminated sheet is 2.5 mm or less.

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