JP5982920B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article. More specifically, the present invention relates to an absorbent article having a hydrophilic composition containing a dye that changes color depending on the pH of the body fluid, and a color chart indicating the pH color change range of the body fluid.

  Conventionally, an absorptive article containing a pigment whose hue changes according to the pH of a body fluid is known. In the conventional absorbent article, it is possible to judge the health condition and physical condition from the hue of the pigment and to judge the replacement time of the absorbent article.

  Patent Documents 1 to 4 disclose an absorbent article that can visually determine a health condition by detecting a change in the pH of a bodily fluid that varies depending on the physical condition. The absorbent article contains a pigment that changes color in a specific pH range. The absorbent article exhibits a different hue depending on the pH value of the body fluid, and thereby the pH of the body fluid can be determined. The user can determine the health condition from the pH value of the body fluid.

JP 2000-279442 A JP-A-8-71101 JP-A-7-88128 JP 2002-11038 A

  However, in conventional absorbent articles containing pigments that change color due to changes in pH, the pH value corresponding to the hue must be determined in documents, instructions, etc. in order for the user or assistant to determine the pH value of the body fluid. It was necessary to investigate. For this reason, there has been a problem that the user or the caregiver cannot immediately determine the pH value from the hue of the pigment and cannot immediately determine the user's health condition visually.

  Moreover, in the conventional absorbent article, since it took time until the pH value corresponding to the hue was determined after the absorbent article containing the pigment absorbed the body fluid, The hue sometimes changed. For this reason, there existed a problem that the exact pH value of a bodily fluid could not be calculated.

  Therefore, at present, there is a demand for an absorbent article that can immediately and accurately discriminate the pH value from the hue of the dye that changes color due to pH change.

Therefore, as a result of intensive studies to solve the above-described problems of the prior art, the present inventor has obtained a hydrophilic composition 1 containing a dye whose hue changes according to the pH of the body fluid, and a dye Obtaining the knowledge that the pH value can be immediately and accurately discriminated from the hue of the hydrophilic composition 1 by obtaining the absorbent article having the color chart 2 having the color sample in the range in which the hue of the color changes. It was.
Specifically, the present invention has the following configuration.

  The present invention comprises an absorption composition comprising a hydrophilic composition 1 containing a dye whose hue changes according to the pH of the body fluid when the body fluid comes in contact, and a color chart 2 having a color sample in a range where the hue of the dye changes. It relates to a property article.

As in the above configuration, the absorbent article has a hydrophilic composition 1 including a dye whose hue changes according to the pH of the body fluid when the body fluid comes in contact with the color sample in a range in which the hue of the dye changes. By having the color chart 2, the pH value can be immediately and accurately determined from the hue of the pigment. As a result, the user or the caregiver immediately determines the user's health condition visually without checking the pH value corresponding to the hue with data or instructions in order to determine the pH value of the body fluid. be able to.
If the pH value of the body fluid can be easily discriminated, the health condition of the user of the absorbent article can be quickly grasped, and if there is an abnormality, treatment such as treatment can be performed immediately.

  In a preferred embodiment of the present invention, the hydrophilic composition 1 is disposed between the absorber top sheet 21 and the protective sheet 23. Here, the absorbent article according to the present invention includes an absorber disposed from the crotch part 11 to the front body 12 and the back body 13, an absorber top sheet 21 that covers the skin contact surface side of the absorber, and an absorber. The protective sheet 23 is laminated on the skin contact surface side of the top sheet 21.

  As described above, the hydrophilic composition 1 is disposed between the absorber top sheet 21 and the protective sheet 23 so that the hydrophilic composition 1 containing a pigment does not directly touch the user's skin. Can be. Thereby, it can prevent that a pigment | dye adheres to a user's skin and causes dermatitis, such as a rash.

  In a preferred embodiment of the present invention, the surface on the absorber top sheet 21 side of the protective sheet 23 is subjected to water repellent treatment.

  As described above, the surface of the protective sheet 23 on the absorber top sheet 21 side is subjected to water repellent treatment, so that the hydrophilic composition 1 containing a pigment effectively touches the user's skin. Can be prevented. Moreover, in order to make the body fluid passing through the protective sheet 23 well, the body fluid is not retained on the protective sheet 23, and the user's wearing feeling can be improved.

  In a preferred embodiment of the present invention, the hue of the pigment changes stepwise or steplessly depending on the pH of the body fluid.

  As in the above configuration, the hue of the pigment changes stepwise or steplessly according to the pH of the body fluid, so that the subtle change in pH of the body fluid can be captured, and the health condition can be accurately known. it can.

  The preferable aspect of this invention is arrange | positioned so that the pigment | dye and the color chart 2 may be visually recognized from the skin contact surface and non-skin contact surface of an absorbent article.

  By arranging the pigment and the color chart 2 so as to be visible not only from the skin contact surface of the absorbent article but also from the skin non-contact surface as in the above configuration, The pH value can be determined from the non-skin contact surface side of the absorbent article. Thereby, the user can discriminate | determine the value of pH, even with the state which worn the absorbent article. The user does not need to remove the absorbent article only for checking the pH value of the body fluid, and can reduce the health care burden on the user or the caregiver.

  The present invention has a hydrophilic composition 1 containing a dye whose hue changes according to the pH of the body fluid when the body fluid comes into contact with the color chart 2 having a color sample in a range where the hue of the dye changes. The health condition and physical condition of the user can be checked immediately and accurately.

  Moreover, since the present invention can determine the pH of the body fluid even when the user is wearing the absorbent article, the user does not need to remove the absorbent article every time the pH of the body fluid is determined. . For this reason, the caregiver etc. can save the effort which removes | releases an absorbent article, and can reduce the burden of health care.

  Furthermore, since the hydrophilic composition 1 is arrange | positioned between an absorber top sheet and a protective sheet, this invention prevents the hydrophilic composition 1 containing a pigment | dye from touching a user's skin directly. Can do. For this reason, it can prevent that a pigment | dye adheres to a user's skin and causes dermatitis, such as a rash.

FIG. 1 is a development view showing an example of a tape-type disposable diaper. FIG. 2 is a development view showing an example of a tape-type disposable diaper. FIG. 3 is a development view showing an example of a tape-type disposable diaper. FIG. 4 is an enlarged cross-sectional view taken along line XX in FIG.

The present invention relates to an absorbent article having a hydrophilic composition 1 containing a dye whose hue changes according to the pH of the body fluid when the body fluid comes into contact, and a color chart 2 having a color sample in a range where the hue of the dye changes. It is about.

Absorbent articles are provided with an absorber that can absorb body fluid such as urine. The absorbent article absorbs body fluids such as urine of a person wearing the absorbent article. An absorptive article may be constituted only with a sheet-like absorber main part, and what combined a plurality of sheet-like structural materials in addition to a sheet which arranged an absorber. Examples of absorbent articles include disposable diapers, sanitary napkins, urine pads, sweat pads and cage sheets.
Hereinafter, the absorbent article of the present invention will be described with reference to the drawings, taking a disposable diaper as a preferred embodiment as an example. The present invention is not limited to the embodiments described below, but includes those appropriately modified by those skilled in the art from the following embodiments.

(1. Basic structure of absorbent article)
The disposable diaper of this embodiment can be a pants-type disposable diaper or a tape-type disposable diaper, for example. The pants-type disposable diaper is a type of disposable diaper in which both front and rear body side parts are joined in advance. As the pants-type disposable diaper, the outer body on which the absorbent main body is placed may be an integrated body that is hung from the front body to the back body, or the outer body is the front body and the back body. And a cross-linked type in which the absorbent main body is cross-linked between the front body exterior body and the back body exterior body. The tape-type disposable diaper is a type of disposable diaper in which an adhesive tape is attached to both sides of the front body or the back body, and the front body and the back body are bonded using the adhesive tape when worn.

  FIG. 1 is a development view showing an example of a tape-type disposable diaper, and shows a state in which the disposable diaper 100 is viewed from a surface (skin contact surface) side in contact with the wearer's skin at the time of wearing. As shown in FIG. 1, the tape-type disposable diaper 100 of the present embodiment is applied to the front body 12 that covers the wearer's abdomen, the back body 13 that covers the back of the wearer, and the inseam of the wearer. It consists of each part of the crotch part 11.

  The tape-type disposable diaper 100 of the present embodiment further includes a hydrophilic composition 1 containing a pigment whose hue changes according to the pH of the body fluid when the body fluid comes in contact with the color sample in a range where the hue of the pigment changes. The color chart 2 is included. The user or the assistant can immediately determine the pH value of the body fluid by comparing the color of the pigment permeated with the body fluid with the color chart 2.

  An absorbent body 20 for absorbing and holding a liquid such as urine is disposed from the crotch portion 11 to the front body 12 and the back body 13. The absorbent body 20 is covered with a liquid-permeable absorbent top sheet 21 from the surface that comes into contact with the skin of the wearer (skin contact surface), and is liquid-impermeable from the opposite skin non-contact surface side. The absorber backsheet 22 is covered. Therefore, a liquid such as urine passes through the absorber top sheet 21 and is absorbed and held by the absorber 20, and leakage to the outside is prevented by the liquid permeable absorber back sheet 22.

  FIG. 2 is an exploded view showing an example of a tape-type disposable diaper, and shows a state in which the disposable diaper is viewed from a surface that does not contact the wearer's skin (non-skin contact surface). . Side flaps 15 extend in the left and right directions on the front body 12 and the back body 13 of the tape-type disposable diaper 100. A fastening tape 30 is attached to the back body 13 so as to protrude from the side edges of the side flaps 15. On the other hand, a front patch 40 for fastening the fastening tape 30 is provided on the skin non-contact surface side of the front body 12. For this reason, the tape-type disposable diaper 100 has the fastening tape 30 attached to the back body 13 with the back body 13 applied to the back of the wearer and the front body 12 applied to the abdomen of the wearer. By attaching to the front patch 40 provided in the front body 12, it is possible to attach to the wearer.

(2. Configuration of each part of the absorbent article)
(2-1. Hydrophilic composition)
The hydrophilic composition 1 can absorb body fluid. The hydrophilic composition 1 contains a dye whose hue changes according to the pH of the absorbed body fluid. When the user's body fluid penetrates to the pigment of the hydrophilic composition 1, the pigment exhibits a different hue depending on the pH of the body fluid. Hue refers to the difference in color appearance. Hue is a change caused by a particular wavelength being prominent, and shows a difference in hue such as red or yellow depending on the range of the prominent wavelength. Major hues include red, yellow, green, blue, and purple.

The hydrophilic composition 1 may have one type or two or more types of pigments. When the hydrophilic composition 1 contains one type of pigment, it is preferable that the pH range of the bodily fluid that can be assumed falls within the color change range of the pigment. When the pH range of the bodily fluid that can be assumed is out of the color change range of the pigment, a specific hue may be shown when the pH value of the bodily fluid is normal or abnormal.
When one type of dye is used for the hydrophilic composition 1, the dye preferably has a color difference of 3 or more between pH 5.0 and 7.0, more preferably between pH 5.0 and 7.0. It has a color difference of 6 or more. For example, when the hue at pH 5.0 to pH 5.6 is yellow, the hue at pH 5.7 to pH 6.3 is yellow green to green, and the hue at pH 6.4 to pH 7.0 is blue to purple. .

When the hydrophilic composition 1 contains two or more types of pigments, the hydrophilic composition 1 can exhibit a hue of red, orange, yellow, yellowish green, blue or purple. When 2 or more types of pigment | dyes are contained in the hydrophilic composition 1, it is preferable that the discoloration area | region of a pigment | dye differs each. The hydrophilic composition 1 can exhibit a hue in a wide pH range by changing the color change range of each pigment.
When two or more kinds of dyes are used in the hydrophilic composition 1, the dyes preferably have a color difference of 4 or more between pH 4.5 and 8.0, more preferably between pH 4.5 and 8.0. It has a color difference of 6 or more. For example, when the hue at pH 4.5 to pH 5.2 is red, the hue at pH 5.3 to pH 5.9 is orange, the hue at pH 6.0 to pH 6.6 is yellow, and pH 6.7 to pH 7. The hue at 2 is yellowish green, and the hue at pH 7.3 to pH 8.0 is green to blue.

By using two or more pigments in the hydrophilic composition 1, the hue of the pigment can be changed stepwise or steplessly according to the pH of the body fluid. A gradual change in the hue of a pigment means that the hue changes to a hue such as red, orange, yellow, yellow-green, green, blue or purple, and does not show an intermediate color between the hues. Say. A stepless change in the hue of a pigment means a change that also shows an intermediate color of each hue such as red, orange, yellow, yellow-green, green, blue, or purple.
By changing the hue of the pigment stepwise or steplessly in accordance with the pH of the body fluid, it is possible to capture a subtle change in the pH of the body fluid and accurately know the health state.

  The type of the dye is not particularly limited, but as the dye, nitrazine yellow, chlorophenollet ゙, bromophenol blue, bromothymol blue, concolette ゙, γ-cinitrophenol, Use dyes such as Resusrin, Methyl Orange, Alizarin S, Bromocresol Green, Methyl Red, Bromocresol Purple, Lacmoit, Cochineal, Hematoxylin, Hematoxylin, Ethyllet, Fromphenollet ゙, Alisarin Red, Bromothymol Blue Can do. In particular, a dye whose color changes at a pH of 3.0 to 8.0 is suitable, and dyes such as bromophenol blue, methyl orange, alizarin S, bromocresol green, methyl red, and bromocresol purple can be used. These dyes are very safe for the human body. It is preferable to use two or more dyes, and it is preferable to use a combination of pigments having different pH ranges.

  These pigments are 0.1 to 50% by weight, preferably 0.5 〜 30% by weight, more preferably 1% by weight 〜 10, based on 100% by weight of the hydrophilic composition 1. Contains by weight. If the amount of the dye is less than 0.1% by weight, the color is thin even if the color is changed, and it may be difficult to visually recognize the color. On the other hand, if it exceeds 50% by weight, the color before the color change of the hydrophilic composition 1 is too dark, the appearance is not good, and the cost may be further increased.

  The pigment is preferably dispersed and contained throughout the hydrophilic composition 1. The coloring matter may be sprayed and attached to the hydrophilic composition 1 in the form of a powder, or the coloring matter may be converted into an ink and attached to the hydrophilic composition 1. In order to convert the dye into an ink, a composition having a constitution in which the dye is adsorbed on hydrogel particles having a cationic group and the surface is covered with a moisture-permeable and water-permeable film as necessary may be used. This composition may be used in combination with an appropriate binder for fixing to the body fluid absorbing patch. As the hydrogel particles, a composition represented by a partially cross-linked product of glycerol glycidyl ether of acrylic acid / acrylamide / methacrylic acid / N, N-dimethylaminoethyl copolymer is used, and the particle size is 0.01. It is preferable to be set to ˜50 μm.

  By applying or printing the dye in ink on the entire hydrophilic composition 1, even when the dye is wetted by body fluid, bleeding does not occur and the dye is in an excellent durability state. It can be adhered to the hydrophilic composition 1.

  It is preferable that the hydrophilic composition 1 contains a hydrophilic polymer having adhesiveness in addition to the above-described pigment. When the hydrophilic polymer has tackiness, hot melt adhesiveness is imparted to the hydrophilic composition 1. If the hydrophilic composition 1 has hot-melt adhesiveness, the hydrophilic composition 1 can be bonded to the main body of the absorbent composition by a hot-melt coating device on the line. Thus, if the hydrophilic composition 1 can be fixed to the main body of an absorptive composition, it can prevent that the hydrophilic composition 1 shifts or twists at the time of use. This prevents the user from feeling uncomfortable when wearing it.

  Examples of the hydrophilic polymer include vinyl pyrrolidone homopolymer, polyamide, and polyvinyl alcohol. These hydrophilic polymers preferably have an average molecular weight of 500 to 30,000, and more preferably 1,000 to 10,000. These hydrophilic polymers are preferably contained in an amount of 20 to 50% by weight, more preferably 30 to 40% by weight, based on the total amount of the hydrophilic composition 1.

  The hydrophilic composition 1 may contain other components such as an antioxidant, a deodorant, and a preservative. These components are preferably contained in an amount of 0.5 to 5% by weight, more preferably 0.5 to 3% by weight, based on the total amount of the hydrophilic composition.

  The hydrophilic composition 1 should just be arrange | positioned in the position which can absorb body fluids, such as urine excreted from the wearer. In the case of a disposable diaper, since the urine excreted from the wearer collects in the crotch part 11, the hydrophilic composition 1 is preferably arranged in the crotch part 11. One hydrophilic composition 1 may be disposed on the crotch part 11, or two or more hydrophilic compositions 1 may be disposed on the crotch part 11. Moreover, the hydrophilic composition 1 may be arrange | positioned in the front body 12 or the back body 13 if it is a position which can absorb some bodily fluids excreted from the wearer.

  It is preferable that the hue of the pigment is visually recognized from the skin contact surface side and the skin non-contact surface side of the absorbent article. It is preferable that the sheet | seat member by the side of the skin contact surface which covers the hydrophilic composition 1 containing a pigment | dye is comprised with the sheet material which has a light transmittance. By constituting the sheet member covering the hydrophilic composition 1 with a light transmissive sheet member, the hue of the hydrophilic composition 1 can be visually recognized from the surface of the absorbent article. Thereby, the hue of a pigment | dye can be visually recognized clearly from the skin contact surface side of an absorbent article.

  Further, a part of the pigment contained in the hydrophilic composition 1 may be soaked in the absorbent body 20 so that the hue of the pigment can be clearly seen from the skin non-contact surface side. In this case, it is good also as making the location where a pigment | dye oozes easily in the specific part of the absorber 20. FIG. Thereby, the hue of a pigment | dye can be visually recognized clearly from the skin non-contact surface side of an absorbent article.

(2-2. Color chart)
The color chart 2 is a color sample for comparison with the hue of the pigment. The color chart 2 is a color chart composed of six or more hues, and a corresponding pH value is written in each hue portion.

  The color chart 2 displays hues arranged in a certain direction in order. The color chart 2 may be arranged in a hue circle and displayed as a hue circle. The pH value may be printed over the color-coated portion, or may be printed in the vicinity of the color-coated portion. The user can immediately determine the pH value by directly comparing the hue of the hydrophilic composition 1 having a pigment and the hue of the color chart 2.

  The color chart 2 is printed on any place of the absorbent article, or the sheet-like color chart 2 is attached to the absorbent article by being attached to the absorbent article. The color chart 2 is preferably printed on the skin contact surface side or the skin non-contact surface side of the absorbent article. When the color chart 2 is printed or pasted on either the skin contact surface side or the skin non-contact surface side of the absorbent article, the color chart 2 is printed or pasted on the surface on the side where the hue of the pigment can be visually recognized. It is preferable to touch.

The color chart 2 is preferably provided in the vicinity of the hydrophilic composition 1 so that it can be easily compared with the hue of the pigment. For example, as shown in FIGS. 1 and 2, when the hydrophilic composition 1 is disposed on the crotch part 3 of the disposable diaper, the color chart 2 can be disposed on the back body 13. The color chart 2 may be arranged in either the left-right direction or the up-down direction. The color chart 2 may be arranged on the crotch 3 side of the front body 12 or the back body 13 so that it can be easily compared with the hue of the pigment.
The color chart 2 is not limited to the front body 12 or the back body 13 but may be provided on other members of the disposable diaper such as the front patch 40 or the fastening tape 30.

  When the sheet-like color chart 2 is attached to the absorbent article, the user may be able to attach the sheet-like color chart 2 to any place of the absorbent article. Thereby, the color chart 2 can be stuck on the position where the user or the assistant can easily compare with the hue of the pigment.

  As shown in FIG. 3, the color chart 2 may be printed as a pattern or a pattern on the skin non-contact surface side of the absorbent article. For example, the color chart 2 may be shown as a circle for each hue, and a pattern as a whole. Since the color chart 2 has multi-colored hues, it can be enjoyed by the person using the absorbent article by printing it as a pattern or pattern on the non-skin contact surface side. Thereby, the color chart 2 has a function of collating with the hue of the pigment, and also functions as a pattern or pattern of the absorbent article.

The color chart 2 is preferably provided so as to be viewed from both the skin contact surface side and the skin non-contact surface side of the absorbent article. The color chart 2 is preferably printed or pasted on the skin contact surface side and the surface of the skin non-contact surface.
The color chart 2 may be printed or pasted on each sheet on the skin contact surface side and the skin non-contact surface side of the absorbent article. Further, the color chart 2 is printed or pasted on either the skin contact surface side or the skin non-contact surface side so that the color chart 2 can be seen through from the side that is not printed or pasted. Also good. In this case, it is preferable that the skin contact surface side and the skin non-contact surface side sheet covering the color chart 2 have light transmittance. Thereby, the hue of the color chart 2 can be visually recognized clearly.

  When the color chart 2 is provided in a disposable diaper, the color chart 2 can determine the pH value of the user's urine. The color of urine may change depending on the user's physical condition. When the color chart 2 is provided in a disposable diaper, it is preferable that the disposable diaper is provided with two or more color charts 2 in consideration of the color of urine. For example, when the yellow color of urine is strong, the color chart 2 having a color sample with the yellow color added can be used. Moreover, when the yellow color of urine is weak, the color chart 2 which has the color sample which does not consider the yellow color can be used. Thereby, even when the color of urine changes depending on the physical condition of the user, the pH value of urine can be accurately determined.

(2-3. Absorber)
The absorber 20 is a member for absorbing and holding the wearer's urine. The absorbent body 20 is composed of an absorbent material in order to absorb and hold the wearer's urine and body fluid. As the absorbent material, for example, fluff pulp, a super absorbent polymer (“SAP”), a hydrophilic sheet, or the like can be used. An example of fluff pulp is a cotton pulp or non-wood pulp defibrated. An example of a superabsorbent polymer is sodium polyacrylate. As the hydrophilic sheet, for example, tissue, absorbent paper, or a nonwoven fabric subjected to a hydrophilic treatment can be used.

  The absorber 20 is sandwiched between the absorber top sheet 21 and the absorber back sheet 22, and the peripheral portions of both sheets are sealed, so that the absorber 20 is interposed between the absorber top sheet 21 and the absorber back sheet 22. Enclosed. The shape of the absorber 20 is not limited to the illustrated shape, and may be, for example, a rectangular shape, a gourd shape, or a T shape.

  The absorber top sheet 21 is a liquid-permeable sheet disposed so as to cover the skin contact surface side of the absorber 20. The absorber top sheet 21 permeates liquid such as urine into the absorber 20 disposed on the lower surface side thereof.

  As the liquid permeable material constituting the absorber top sheet 21, for example, a woven fabric, a non-woven fabric, or a porous fill can be adopted. In particular, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon that has been subjected to a hydrophilic treatment.

  The absorber top sheet 21 may be composed of a single sheet material, but may be composed of a plurality of sheet materials. For example, the structure which combined the sheet | seat arrange | positioned at the surface part of an absorber and the sheet | seat arrange | positioned in the part of the side flap 15 may be sufficient.

  The absorbent back sheet 22 is a liquid-impermeable sheet that is disposed so as to cover the absorbent body 20 from the skin non-contact surface side. The absorber back sheet 22 prevents the liquid held by the absorber 20 from leaking outside the diaper.

  As a liquid-impermeable material constituting the absorber back sheet 22, for example, a liquid-impermeable film made of a resin such as polyethylene can be employed. In particular, it is preferable to use a microporous polyethylene film. This microporous polyethylene film is preferable in that it has a large number of fine pores of about 0.1 μm and is liquid impermeable but moisture permeable so that it can prevent the diaper from being steamed.

  Further, a cover sheet 25 may be bonded to the outer surface of the absorbent back sheet 22 in order to reinforce the absorbent back sheet 22 and improve its feel. As a material for forming the cover sheet 25, for example, a nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester, or a wet nonwoven fabric can be used.

  It is preferable that the absorber back sheet 22 and the cover sheet 25 are composed of sheets having optical transparency. Or the absorber back sheet | seat 22 and the cover sheet | seat 25 may be comprised from a transparent sheet | seat. Thereby, the hue of a pigment | dye can be visually recognized clearly from the skin non-contact surface side of an absorbent article.

(2-4. Protection sheet)
The tape-type disposable diaper 100 of the present embodiment includes an absorbent body 20 arranged from the crotch part 11 to the front body 12 and the back body 13, an absorbent top sheet 21 that covers the skin contact surface side of the absorbent body 20, and an absorption The protective sheet 23 is laminated on the skin contact surface side of the body top sheet 21.

  As shown in FIG. 4, the protective sheet 23 is a sheet further provided on the skin contact surface side of the absorbent body top sheet 21. FIG. 4 shows an enlarged cross-sectional view along the line XX in FIG. 1, and the hydrophilic composition 1 and the protective sheet 23 are arranged on the skin contact surface side of the absorber 20 and the absorber top sheet 21. Has been.

  The hydrophilic composition 1 is disposed between the absorber top sheet 21 and the protective sheet 23. By holding the hydrophilic composition 1 containing a pigment so as to be sandwiched between the protective sheet 23 and the absorber top sheet 21, the hydrophilic composition 1 can be prevented from directly touching the user's skin.

The protective sheet 23 functions to sandwich the absorber top sheet 21 and the hydrophilic composition 1. The protective sheet 23 may be bonded on the absorber top sheet 21 or may be bonded to another member of the disposable diaper 100.
Moreover, the whole of the protective sheet 23, the absorber 20, and the absorber top sheet 21 may be covered, or may be provided on a part of the absorber 20 and the absorber top sheet 21.

  The protective sheet 23 is a liquid-permeable sheet disposed so as to cover the hydrophilic composition 1. The protective sheet 23 allows liquid such as urine to permeate the hydrophilic composition 1 and the absorber 20 disposed on the lower surface side thereof. As the protective sheet 23, for example, a woven fabric, a non-woven fabric, or a porous film can be adopted. In particular, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon that has been subjected to a hydrophilic treatment.

In the protective sheet 23, it is preferable that the surface on the absorber top sheet side of the protective sheet 23 is subjected to water repellent treatment. The water repellent treatment is preferably performed only on one side of the protective sheet. It is not preferable to perform a double-sided water-repellent treatment on the protective sheet 23 because the body fluid is less likely to penetrate the protective sheet 23 and the body fluid absorption rate is reduced. If it becomes difficult for the body fluid to penetrate the protective sheet 23, in the case of a disposable diaper, it may cause a body fluid leak.
In the present invention, the protective sheet 23 is one surface of the protective sheet 23, and the surface on the absorber top sheet side is subjected to water repellent treatment. For this reason, it can prevent effectively that a pigment | dye touches a user's skin. Moreover, in order to make the bodily fluid which passes a protective sheet run out well, a bodily fluid is not hold | maintained on a protective sheet, but a user's wearing feeling can be improved.

  For the water repellent treatment, a method of preparing the protective sheet 23 and then applying the water repellent treatment to one surface of the protective sheet 23 may be adopted, or the water repellent treatment may be applied to one surface of the sheet-like or film-like material. You may employ | adopt the method of giving a process and cutting it and preparing the protection sheet 23. FIG.

  The water repellent treatment method is not particularly limited, and ordinary methods can be widely adopted. Specifically, a method using a water repellent treatment agent such as silicon oil, fluororesin, methyl hydrogen polysiloxane or an oil agent containing these components can be used.

  The present invention can be applied to sanitary napkins, disposable diapers, sweat pads, urine pads, and cage sheets.

DESCRIPTION OF SYMBOLS 1 Hydrophilic composition 2 Color chart 11 Crotch part 12 Front body 13 Back body 15 Side flap 20 Absorber 21 Absorber top sheet 22 Absorber back sheet 23 Protective sheet 25 Cover sheet 30 Fastening tape 40 Front patch 51 Around leg part Stretch material 52 Waist around stretch material 100 Disposable diapers

Claims (2)

An absorber (20) disposed from the crotch (11) to the front body (12) and the back body (13);
A liquid-permeable absorber top sheet (21) covering the skin contact surface side of the absorber (20);
A liquid-impermeable absorber backsheet (22) covering the skin non-contact surface side of the absorber (20);
A protective sheet (23) laminated on the skin contact surface side of the absorber top sheet (21);
A hydrophilic composition (1), which is disposed between the absorber top sheet (21) and the protective sheet (23), and contains a pigment whose hue changes according to the pH of the body fluid when the body fluid comes in contact with it ,
A color chart (2) having a color sample in a range in which the hue of the dye changes,
The hydrophilic composition (1), as dye hue depending on the pH of the body fluid is continuously varied, see contains two or more types of dye color transition range is different,
The said protection sheet (23) consists of a woven fabric or a nonwoven fabric, Absorbent article which only the one surface by the side of the said absorber top sheet (21) has water repellency . The pigment and the matching color chart (2) are arranged so as to be viewed from the skin contact surface side and the skin non-contact surface side of the absorbent article.
The absorbent article according to claim 1 .

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