JP4874050B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an indicator that makes it possible to recognize the presence of excrement such as urine and feces, particularly liquid excretion from the outside by coloration, an absorbent article such as a disposable paper diaper or a sanitary napkin having a so-called notification function. About.

  Conventionally, when excretion such as urination and defecation, especially liquid excretion, it is possible to confirm that there was excretion from the outside by touching the diaper and changing the color without bothering to remove it. Disposable disposable diapers with various indicators that make them recognizable are known.

Various types of indicators have been proposed. For example, in Patent Document 1 below, as an indicator, a hydrophilic substrate sheet, a flower pattern printed on the inner surface thereof, and printed on the outer surface so as to cover at least the flower pattern, and when the diaper is in a dry state, the flower And a masking part for concealing the handle so that the pattern is not substantially visible from the outside. The masking part scatters light when it is in a dry state and exhibits white or milky white color. There is described a disposable diaper that makes it difficult to visually recognize a pattern, and when it gets wet with urine, its scattering is reduced and it becomes transparent, so that the floral pattern can be visually recognized through the masking portion.
Japanese Patent Laid-Open No. 9-140742

  However, in the disposable diaper described in Patent Document 1, since the masking part is made transparent by reducing the scattering of light of the material itself when the masking part gets wet with urine, the flower pattern can be seen through. There was a problem that the masking part returned to white or milky white due to moisture returning to the absorber or leaving the mask for a long time to dry again, making it impossible to see through the floral pattern.

  On the other hand, in recent years, as the indicator, when there is excretion such as urination and defecation, particularly liquid excretion, a pigment that is colored by the water, the components of the excrement, the component added to the paper diaper eluted by the water, etc. Disposable disposable diapers having an indicator formed by means such as printing have been proposed.

  However, even in such a diaper, as described above, when the moisture is returned to the absorber or left for a long time, the dye diffuses or dries, and the coloration state of the indicator Was not maintained, and there was a problem of fading. Furthermore, when excretion occurs, the excrement diffuses the absorber uniformly, and there is a problem that the contact area with the indicator is limited and only a certain area is colored, making it difficult to see. In addition, when placed in a humid environment, the indicator function works due to humidity even without excretion, and coloration may occur.

  Then, the main subject of this invention is providing the absorbent article which improved the visibility of the indicator while maintaining the notification state of an indicator for a long time.

In order to solve the above-mentioned problem, as the present invention according to claim 1, in an absorbent article in which an absorbent body is interposed between a liquid-permeable surface sheet and a liquid-impermeable leak-proof sheet,
An indicator showing coloration by contact with moisture or body fluid is disposed on the leak-proof sheet side from the absorbent body, and at least the absorbent body of the indicator is covered with a hydrophilic resin over the entire surface. There is provided an absorbent article characterized in that

The present invention according to claim 1 shows a first embodiment of an indicator, and an indicator that shows coloration by contact with moisture or body fluid is disposed on the side of the leak-proof sheet from the absorber. In addition, since the absorbent body of the indicator covers the entire surface of the back surface with a hydrophilic resin, the body fluid soaked in the hydrophilic resin and the indicator are easily brought into direct contact with each other. Color is promoted. Furthermore, the body fluid that has once contacted the indicator is prevented from returning to the absorber or drying due to the presence of the hydrophilic resin, so that the contact state with the indicator is maintained for a long time and the color state of the indicator is maintained. Become.

As the present invention according to claim 2, in an absorbent article in which an absorber is interposed between a liquid-permeable surface sheet and a liquid-impervious leak-proof sheet,
An indicator showing coloration by contact with moisture or body fluid is arranged on the leak-proof sheet side from the absorber, and at least a part of the side of the indicator of the indicator is a hot melt adhesive. An absorbent article is provided that is coated.

  The present invention according to claim 2 shows a second embodiment of the indicator, and an indicator showing coloration by contact with moisture or body fluid is arranged on the leak-proof sheet side from the absorber. In addition, at least a part of the side of the absorber of the indicator is coated with a hot melt adhesive, so that the dye constituting the indicator can be easily fixed on the sheet material serving as a base material, and the dye is dispersed. In addition to being able to suppress, it is possible to suppress the bodily fluid that has once contacted the indicator from returning to the absorber, and the contact state between the bodily fluid and the indicator is maintained, so that the colored state of the indicator is maintained.

  As the present invention according to claim 3, there is provided the absorbent article according to claim 2, wherein a hot melt adhesive is applied to at least a part of the side surface of the leakproof sheet of the indicator.

  The third aspect of the present invention shows a third embodiment of the indicator, and the indicator sheet is particularly provided by applying a hot melt adhesive to at least a part of the side surface of the indicator. The hot-melt adhesive applied to the back surface (lower surface) of the leak-proof sheet can fix the ink constituting the indicator to the base sheet and suppress the dispersion of the ink.

  As the present invention according to claim 4, the absorption according to any one of claims 1 to 3, wherein the indicator is formed by printing ink that exhibits color by contact with moisture or body fluid on the absorbent article constituent member. A sex article is provided.

  As for this invention which concerns on Claim 5, the said indicator arrange | positions the sheet | seat material which has arrange | positioned the indicator which shows color by contact with a water | moisture content or a bodily fluid, on a thin paper-like raw material. An absorbent article is provided.

  The present invention as set forth in claims 4 and 5 specifically shows an indicator formation mode.

  As the present invention according to claim 6, there is provided an absorbent article according to any one of claims 1 to 5, wherein a portion other than the portion where the indicator is formed is subjected to a hydrophobic treatment.

  In the present invention described in claim 6, since the diffusion of the body fluid in the planar direction is suppressed by applying a hydrophobic treatment to the portion other than the indicator forming portion, the dye is likely to accumulate in the indicator forming portion, and In the portion where the indicator is formed, the body fluid easily diffuses along the indicator, and a wide range of indicators are colored, thereby improving the visibility of the indicator.

  As described above, according to the present invention, the notification state of the indicator can be maintained for a long time and the visibility of the indicator can be improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a partially broken development view of a disposable paper diaper according to the present invention, and FIG. 2 is a transverse sectional view.

[Disposable diaper structure]
In FIG. 1, a disposable diaper 1 is made of cotton-like pulp or the like, has a certain degree of rigidity such as an hourglass shape (or rectangular shape), and is surrounded by a core wrap sheet 5 such as crepe paper or hydrophilic nonwoven fabric. Body 4, liquid-permeable top sheet 3 made of a perforated or non-porous nonwoven fabric or a perforated plastic sheet, etc., disposed so as to cover the surface side (use surface side) of absorbent body 4, and the absorbent body A leak-proof sheet 6 made of polyethylene or the like that is disposed on the back surface side of the absorbent body 4 so as to cover at least the entire area of the absorber 4, and an outer surface side (non-skin contact surface side) of the leak-proof sheet 6 The outer surface back sheet 2 that defines the outer shape of the diaper and the three-dimensional gather BS that stands on the surface side are formed on both sides of the paper diaper. The side nonwoven fabrics 7 and 7 for forming the side flap portion SF together with the seat 6 and the back sheet 2, the mechanically joined fastening tapes 10 and 10 provided on both side portions on the back side of the diaper, and the absorber 4 The leaking sheet 6 is mainly composed of an indicator 12 made of ink which is arranged in a predetermined region on the side surface and shows color by moisture. Further, at the abdomen waist portion and the back waist portion of the paper diaper, the outer back sheet 2, the leak-proof sheet 6 and the liquid-permeable top sheet 3 extend together, and an end flap portion EF where the absorbent body 4 does not exist is formed. ing.

  In attaching, as shown in FIG. 3, the front and back bodies of the disposable diaper 1 are respectively applied to the wearer's body, and then the fastening tapes 10 and 10 are brought to the ventral side, A paper diaper is mounted in direct engagement with the surface.

In the following, each configuration will be specifically described in detail.
The absorbent body 4 is made of, for example, fluffy pulp and a water-absorbing polymer. In the illustrated example, the absorbent body 4 has a substantially hourglass shape having constricted portions on both sides in order to reduce the contact with the legs. The water-absorbing polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolved pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price. When the absorbent body 4 is surrounded by the core wrap sheet 5 as in the illustrated example, the core wrap sheet 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4 as a result. The core wrap sheet 5 having excellent properties diffuses body fluid quickly and prevents the body fluid from returning.

  As the liquid-permeable top sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Examples of the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, an air through method, a melt blown method, or a needle punch method can be used. Of these processing methods, the spunlace method is excellent in terms of flexibility and the spunbond method is excellent in drapeability, and the thermal bond method and the air-through method are excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable top sheet 3, the body fluid is quickly absorbed, and the dry touch property is excellent.

  The leak-proof sheet 6 is made of a sheet material having at least a water shielding property such as an olefin resin sheet such as polyethylene or polypropylene, and is installed in a range covering at least the entire area of the absorber 4 in order to prevent leakage. In recent years, those having moisture permeability are preferably used from the viewpoint of preventing stuffiness. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. If the sheet thickness is the same, the rigidity is lower than that of the non-porous sheet, which is superior in terms of flexibility. As such a leak-proof sheet 6, it is desirable to use a transparent or translucent sheet so that the indicator 12 arranged on the inner surface side can be seen from the outside. In the case of translucency, a plastic film is preferably used which is internally added with pigments and fillers such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc, and barium sulfate. . Further, it is desirable that the leak-proof sheet 6 is formed to be porous from the viewpoint of easy fixing of the ink constituting the indicator 12.

  As the side nonwoven fabric 7, a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of an important function. For example, if importance is placed on functions such as preventing the penetration of bodily fluids or enhancing the feeling of touch, it is necessary to use a water-repellent non-woven fabric coated with a silicon-based, paraffin-based, or alkylchromic chloride-based water repellent. desirable. In addition, if importance is attached to absorbability of body fluids, a method of polymerizing a compound having a hydrophilic group, for example, an oxidation product of polyethylene glycol, in the production process of synthetic fibers, or a metal such as stannic chloride Use a non-woven fabric that has been treated with salt to make the synthetic fiber swelled or porous, such as by partially dissolving the surface to make it porous and depositing metal hydroxide, and applying hydrophilicity by applying capillary action. It is desirable to make it.

  The liquid-permeable top sheet 3 protrudes slightly outward from the side edge of the absorber 4 and is joined to the leak-proof sheet 6. The side nonwoven fabric 7 has an outer portion extending to the outer edge rather than the vicinity of the side edge portion of the absorbent body 4 and is joined to the leakage preventing sheet 6 and the outer back sheet 2, and the laminated sheet portion constitutes a side flap SF. Yes.

  In the side flap portion SF, a plurality of elastic elastic members 8 and 8 in the illustrated example are arranged in the longitudinal direction of the paper diaper, and a planar gather is formed. The flat gathers hold the paper diaper tightly around the legs when worn, thereby improving fit and preventing the paper diaper from shifting.

  On the other hand, a three-dimensional gather BS standing on the surface side is formed by the nonwoven fabric sheet portion on the inner side of the fixed portion of the side nonwoven fabric 7. The three-dimensional gather BS has a standing end near the side edge of the absorbent body 4, and the tip thereof is double-folded along the longitudinal direction of the paper diaper. One elastic elastic member 9 is formed inward of the folded portion. If necessary, a plurality of elastic elastic members are provided, and the three-dimensional gather BS is erected using the elastic force.

  As the elastic elastic members 8 and 9, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester and the like that are usually used can be used. .

  The material fibers constituting the side nonwoven fabric 7 can be synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, and natural fibers such as cotton. The nonwoven fabric obtained by an appropriate processing method such as a spunbond method, an air-through method, a melt blown method, a needle punch method can be used. In particular, the side nonwoven fabric 7 constituting the side flap portion SF has a feeling of wrinkles. In order to eliminate it and to prevent stuffiness, it is preferable to use a non-woven fabric that suppresses the basis weight and has excellent air permeability.

  The mechanical joining type fastening tape 10 has a base of a fastening base material 10A such as plastic, polylaminated nonwoven fabric, nonwoven fabric, paper, etc. joined to a diaper. A hook element 10B is provided on the protruding piece portion of the fastening substrate 10A and on the surface side (surface on the liquid-permeable top sheet 3 side). The hook element 10B is bonded to the fastening base material 10A with an adhesive so as not to be peeled off. The hook element 10B has a large number of engaging pieces 10b, 10b,. Examples of the shape of the engagement piece 10b include a letter shape, a J shape, a mushroom shape, and a T shape, but any shape may be used. Preferred is a T-shape. In the product state, the fastening tape 10 is folded to the liquid-permeable top sheet 3 side, and the hook element 10B is detachably bonded to the side nonwoven fabric 7.

  A nonwoven fabric is used as the outer back sheet 2. As the material fibers constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. A nonwoven fabric obtained by an appropriate processing method such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these non-woven fabrics, non-woven fabrics manufactured by an air-through method in which heated air is sent in the drum conveyance process during the manufacture of the non-woven fabric and the fibers are thermally fused are suitably used. Since the air-through method fuses fibers with the heat of high-temperature air, the air-through method has advantages such as a soft feeling with a high space ratio and bulkiness, and can improve the engagement force of the fastening tape 10. it can. In addition, like the example of illustration, the raising process can be performed with respect to the predetermined range 11 assumed as an engaging area | region of the fastening tape 10, or embossing can be provided with various embossing patterns. Moreover, you may adhere | attach the another member which gave these raising | fluff processing and embossing.

(First example of indicator 12)
Next, the indicator 12 will be described in detail. As shown in FIG. 2, the indicator 12 according to the first embodiment of the present invention is closer to the leak-proof sheet 6 than the absorbent body 4, that is, on the inner and outer surfaces of the core wrap sheet 5 or the inner surface of the leak-proof sheet 6. In the illustrated example, indicators 12, 12,... Showing color by contact with moisture or body fluid are arranged on the inner surface of the leak-proof sheet 6, and at least the absorber 4 of the indicator 12 is at least substantially an indicator on the side. A part including the 12 arrangement regions, preferably the entire surface is covered with the hydrophilic resin 13. The indicator 12 is formed by printing ink that exhibits color by contact with moisture or body fluid on the constituent member of the paper diaper 1 or prints ink that exhibits color by contact with moisture or body fluid on a thin paper-like material. It is possible to dispose a sheet material that has been disposed.

  As the resin of the hydrophilic resin 13, polyvinyl alcohol, polyethylene glycol, carboxymethyl cellulose, starch, or the like having affinity can be suitably used, and a liquid one may be applied or a film-like one may be used. It may be covered. The hydrophilic resin 13 is preferably one that forms a flexible film after coating. Moreover, even when it coat | covers with a film-form thing, resin which forms a flexible film is desirable. By covering the indicator 12 with the hydrophilic resin 13, the body fluid soaked in the hydrophilic resin 13 and the indicator 12 come into direct contact, and the coloration of the indicator 12 is promoted. Furthermore, the body fluid that has once contacted the indicator 12 is prevented from returning to the absorbent body 4 by the hydrophilic resin 13 and is difficult to dry even if left for a long time, and the contact state with the indicator 12 is maintained for a long time. Thus, the colored state of the indicator 12 is maintained for a long time.

  As the ink constituting the indicator 12, an ink in which a water-soluble pigment or dye is dispersed in an organic solvent or a water-soluble, water-decomposable dye or leuco dye and a phenolic compound that develops color of the leuco dye, an acidic substance, It is preferable to use an ink comprising a developer such as an electron accepting substance. In the present invention, a type formed by dispersing in a solvent component such as benzene, toluene, xylene, hexane, octane, cyclohexane, cyclohexanone, etc., and adding a binder component so as not to dissolve, that is, cause color development, a pigment that is soluble in body fluid. In the case of using the indicator ink, particularly excellent effects are exhibited. Prior to contact with moisture or body fluid, the ink components are in an agglomerated state, and the printed characters and patterns are unclear. When the ink components that are in an aggregated state are dissolved and dispersed by contact with moisture or body fluid, the printed characters and patterns are colored, darkened, or discolored to become clear and function as a good urination indicator. That is, it is possible to prevent the coloring matter that has been dissolved in moisture from being dispersed in the surrounding body fluid over time, and the vividness of coloring to be lost. The ink can be colored in any color or can be colored. However, in the dry state, the ink is preferably colorless to make the indicator 12 inconspicuous.

  In addition, when using as the indicator which changes color, the ink component of a color tone different from the ink in an aggregation state is mixed beforehand. It is possible to adopt a configuration in which the aggregated ink is dissolved by contact with moisture or body fluid and is changed to a different color tone by being dissolved with the other ink component.

  The indicator 12 is arranged in a region where coloration by excrement absorbed by the absorber 4 is efficiently performed. Specifically, as shown in FIG. 1 to FIG. 3, on the inner surface of the core wrap sheet 5 or the leak-proof sheet 6 on the leak-proof sheet 6 side from the absorbent body 4, in the form of a plane, a band, or a number of streaks In the illustrated example, they are arranged in three strips. Further, when the indicator 12 comes into contact with the water of excrement, the pigment constituting the indicator 12 is eluted in the water of the excrement. Therefore, in order to prevent the water in which the ink is dissolved from being absorbed by the absorber 4 and the coloration of the indicator 12 from being lowered, direct contact between the dye constituting the indicator 12 and the absorber 4 is avoided. Is preferred. When ink is used as the indicator 12, the material to be printed is preferably porous in order to improve the ink fixing property.

  Further, as shown in FIG. 4, it is preferable to apply a hydrophobizing treatment 14 to portions other than the portion where the indicator 12 is formed. In the example shown in FIG. 4, the portion other than the portion where the indicator 12 is formed is a region covering at least the absorber 4 on the inner surface of the leak-proof sheet 6 to which the indicator 12 is applied, and other than the portion where the indicator 12 is formed. Refers to the part. The hydrophobic treatment 14 suppresses the diffusion of the body fluid in the planar direction, so that the pigment is likely to stay in the indicator 12 formation portion, and in the indicator 12 formation portion, the dye penetrates or diffuses along the indicator 12. Thus, the indicator 12 exhibits color over a wide range, and the visibility of the indicator 12 can be improved. By subjecting the sheet adjacent to the sheet forming the indicator 12 to a hydrophobic treatment, the effect of preventing the diffusion of the dye by preventing the diffusion of the body fluid is further enhanced. When the indicator 12 is adjacent to the core wrap sheet 5, the core wrap sheet 5 may be divided into an upper layer and a lower layer, and only the lower layer may be subjected to a hydrophobic treatment.

(Second example of indicator 12)
As shown in FIG. 5, the indicator 12 according to the second embodiment of the present invention is closer to the leakage preventing sheet 6 side than the absorbent body 4, that is, on the inner and outer surfaces of the core wrap sheet 5 or the inner surface of the leakage preventing sheet 6. In the illustrated example, indicators 12, 12,... Showing color by contact with moisture or body fluid are arranged on the inner surface of the core wrap sheet 5, and at least a part of the side surface of the absorber 4 of the indicator 12 is hot-melted. It is formed by covering with an adhesive 15.

As shown in FIG. 6, the hot melt adhesive 15 is intermittently formed along the indicator 12 so as not to impede penetration of body fluid into the indicator 12, for example, a film or spiral having a fine hole (illustrated example). ), Wavy, dotted or dotted. The hot melt adhesive 15 is preferably applied at a coating amount of 0.5 to 6 g / m ² .

  The hot melt adhesive 15 makes it easy for the ink constituting the indicator 12 to be fixed to the sheet material serving as the base material, can suppress the dispersion of the ink, and the body fluid that has once contacted the indicator 12 returns to the absorber 4. In addition, the coloration state of the indicator 12 can be maintained for a long time by maintaining the contact state between the body fluid and the indicator 12 by suppressing the drying. In addition, about the structure of the other indicator 12, etc., it is the same as that of the said 1st form example.

(Third example of indicator 12)
As shown in FIG. 7, the indicator 12 according to the third embodiment of the present invention is illustrated on the leakage preventing sheet 6 side from the absorber 4, that is, on the inner and outer surfaces of the core wrap sheet 5 or the inner surface of the leakage preventing sheet 6. Are arranged on the inner surface side of the core wrap sheet 5 and are colored by contact with moisture or body fluid, and the absorbent body 4 of the indicator 12 has at least a part of the side surface hot-melted. The hot melt adhesive 16 is applied to at least a part of the surface of the indicator 12 on the leakproof sheet 6 side, which is covered with the adhesive 15.

  The hot melt adhesive 16 applied to the surface (lower surface) of the indicator 12 on the leak-proof sheet 6 side is for fixing the ink constituting the indicator 12 to the leak-proof sheet 6 as a base material and suppressing the dispersion of the ink. It can be applied in any form. In addition, about the structure of the other indicator 12, hot-melt-adhesive, etc., it is the same as that of the said 1st and 2nd form example.

[Other examples]
(1) In the above embodiment, the present invention has been described by taking a tape-type disposable paper diaper as an example, but the present invention can be similarly applied to a pants-type disposable paper diaper. Furthermore, the present invention can be similarly applied to absorbent articles in general including disposable diapers, urine pads, and sanitary napkins.
(2) In the first embodiment, the hydrophilic resin 13 is coated with the same width as the indicator 12, but the hydrophilic resin 13 may be coated with a width wider than the indicator 12. In the second embodiment and the third embodiment, the hot melt adhesive 15 (16) is coated with the same width as the indicator 12, but may be coated with a width wider than the indicator 12.
(3) In the second and third embodiments, a hot-melt adhesive having hydrophilicity can be used as the hot-melt adhesive 15. In this case, the entire surface of the indicator 12 can be covered in the same manner as the hydrophilic resin 13.
(4) In the above embodiment, ink is used as the indicator 12 that shows coloration due to moisture, but it may be constituted by a hot melt adhesive containing a colorant, or other colorant may be used. The indicator 12 may be formed by being contained in the adhesive.

It is a partial fracture development view of disposable paper diaper 1 concerning the present invention. It is the II-II arrow directional view of FIG. It is a perspective view which shows the mounting state of the disposable paper diaper. It is the II-II arrow directional view of FIG. 1 at the time of performing the hydrophobization process 14. FIG. It is a diaper transverse cross section concerning the example of the 2nd form of indicator 12. It is the VI-VI line arrow directional view of FIG. It is a diaper transverse cross section concerning the example of the 3rd form of indicator 12.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Disposable diaper, 2 ... Outer surface back sheet, 3 ... Liquid-permeable top sheet, 4 ... Absorber, 5 ... Core wrap sheet, 6 ... Leak-proof sheet, 7 ... Side nonwoven fabric, 8.9 ... Elastic elastic member, DESCRIPTION OF SYMBOLS 10 ... Fastening tape, 11 ... Engagement range, 12 ... Indicator, 13 ... Hydrophilic resin, 14 ... Hydrophobization treatment, 15 * 16 ... Hot melt adhesive

Claims (6)

In an absorbent article in which an absorber is interposed between a liquid-permeable surface sheet and a liquid-impermeable leak-proof sheet,
An indicator showing coloration by contact with moisture or body fluid is disposed on the leak-proof sheet side from the absorbent body, and at least the absorbent body of the indicator is covered with a hydrophilic resin over the entire surface. An absorbent article characterized by being. In an absorbent article in which an absorber is interposed between a liquid-permeable surface sheet and a liquid-impermeable leak-proof sheet,
An indicator showing coloration by contact with moisture or body fluid is arranged on the leak-proof sheet side from the absorber, and at least a part of the side of the indicator of the indicator is a hot melt adhesive. An absorbent article characterized by being coated.   The absorbent article according to claim 2, wherein the leakproof sheet of the indicator is coated with a hot melt adhesive on at least a part of the side surface.   The absorptive article according to any one of claims 1 to 3, wherein the indicator is formed by printing ink that exhibits color by contact with moisture or body fluid on the absorbent article constituent member.   The said indicator is an absorbent article in any one of Claims 1-3 which arrange | positions the sheet | seat material which has arrange | positioned the indicator which shows color by contact with a water | moisture content or a bodily fluid to a thin paper-like raw material.   The absorbent article according to any one of claims 1 to 5, wherein a portion other than the indicator forming portion is subjected to a hydrophobic treatment.

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