JP2014108264A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which prevents an indicator from making a response to a case of a small amount of excretion that does not require a change of the absorbent article and can inform a wearer of appropriate changing time.SOLUTION: An incontinence pad 1A of an embodiment of the invention includes: a liquid-permeable surface sheet 2 disposed on a skin-facing surface side; a poorly liquid-permeable back surface sheet 3 disposed on a non skin-facing surface side; and an absorber 4 disposed between the sheets 2, 3. The incontinence pad 1A has a wetting detecting region 5 where a wetting detecting means 51 that can be visibly recognized by a wearer is provided at least at one of both end parts 10a, 10b in a longitudinal direction of an absorbent article and both end parts 10s, 10s in a width direction. The wetting detecting region 5 is disposed in such a manner to have at least a part overlapping the absorber 4 in a thickness direction, and a liquid diffusion prevention region 6 is provided on a central side in the longitudinal direction relative to the wetting detecting region 5.

Description

  The present invention relates to absorbent articles such as incontinence pads, urine-absorbing pads, sanitary napkins, and diapers.

  2. Description of the Related Art Conventionally, an absorbent article such as a diaper is known that includes an indicator that detects whether or not a wearer has excreted by wetness, and that determines the correct replacement time based on the color and scent of the indicator. For example, Patent Literature 1 describes a urine receiving portion that faces a urine discharge portion and a disposable diaper in which different fragrances are imparted to end portions in the longitudinal direction. Patent Document 2 discloses a label in which a liquid diffusion mechanism is disposed between an upper layer absorber and a lower layer absorber in an absorbent article having overhang portions at both ends in the width direction, and excretion fluid can be detected at the overhang portion. A material is disposed.

JP2011-103923A JP2011-229848A

  The disposable diaper described in Patent Document 1 is described as including a sub-layer sheet in order to ensure that urine comes into contact with the fragrance, and the indicator reacts even in the case of a small amount of excrement that does not need to be replaced. There is a possibility that.

  Since the liquid diffusion mechanism is arranged between the upper layer absorber and the lower layer absorber, the absorbent article described in Patent Document 2 is an indicator when it is not an appropriate replacement time as in Patent Document 1. May react. Furthermore, since there is no absorber in the area where the indicator is placed, there is a risk that the indicator will leak at the same time it reacts.

  Therefore, the subject of this invention is related with the absorbent article which prevents that an indicator reacts in the case of a small amount of excretion which does not need replacement | exchange, and can notify a wearer of appropriate replacement | exchange time.

  The present invention comprises a liquid-permeable front sheet disposed on the skin facing surface side, a liquid-impermeable back sheet disposed on the non-skin facing surface side, and an absorber disposed between these sheets. An absorbent article provided with at least one of both ends in the longitudinal direction and both ends in the width direction of the absorbent article has a wetness detection region provided with wetness detection means visible to the wearer, The absorbent article is provided such that the wetness detection area is arranged so as to at least partially overlap the absorber in the thickness direction, and a liquid diffusion prevention area is provided on the center side in the planar direction of the article from the wetness detection area. To do.

  The absorbent article of the present invention can prevent the indicator that detects wetting from reacting in the case of a small amount of excretion that does not require replacement, and can inform the wearer of an appropriate replacement time.

Drawing 1 is a top view which looked at an absorptive article of a 1st embodiment from the surface sheet side. 2 is a cross-sectional view taken along line X1-X1 of FIG. 3 is a cross-sectional view taken along line Y1-Y1 of FIG. Drawing 4 is a top view which looked at an absorptive article which is a 2nd embodiment from the surface sheet side. Drawing 5 is a top view which looked at an absorptive article which is a 3rd embodiment from the surface sheet side. 6A to 6D are plan views schematically showing another embodiment.

  Hereinafter, the absorbent article of this invention is demonstrated, referring FIGS. 1-3 based on 1st Embodiment which is the preferable incontinence pad.

As shown in FIG. 1, the incontinence pad 1 </ b> A (hereinafter also referred to as “pad 1 </ b> A”) of the first embodiment includes a liquid-permeable surface sheet 2 disposed on the skin facing surface side and a non-skin facing surface side. A liquid-impervious back sheet 3 disposed on the surface, and a rectangular absorbent body 4 disposed between the sheets 2 and 3, and is provided with wetness detection means 51 that is visible to the wearer. A wetness detection area 5 and a liquid diffusion prevention area 6. Specifically, as shown in FIG. 2, the rectangular absorbent body 4 includes a rectangular absorbent core 41 in which an absorbent polymer is uniformly dispersed in a fiber assembly, and the skin of the absorbent core 41. And a core wrap sheet 42 covering the entire surface on the facing surface side and the entire surface on the non-skin facing surface side. The wetness detection means 51 is an area that includes an indicator that changes visually by touching moisture and detects excretion. The visual change means, for example, that the color changes or disappears before and after contact with moisture, and that the color appears in a colorless place. “Visual change” or “color change” means a color change from one color to another, a color disappearance from colored to colorless, and a color appearance from colorless to colored by contact with moisture. The liquid diffusion preventing region 6 is a region that suppresses diffusion so that urine does not diffuse to the end of the pad 1A when urination is small.
In addition, in this specification, a "skin opposing surface" is a surface distribute | arranged to the wearer's skin side at the time of wear among the front and back of the structural member of the pad 1A, and "non-skin opposing surface" Is a surface arranged on the opposite side of the wearer's skin when worn.

  As shown in FIG. 1, the pad 1 </ b> A has a longitudinal direction corresponding to the longitudinal direction of the wearer and a width direction orthogonal to the longitudinal direction, and has a long shape in the longitudinal direction. Here, the Y direction in the figure is the same direction as the longitudinal direction of the pad 1A. Further, the X direction in the drawing is the same direction as the width direction of the pad 1A. Moreover, as shown in FIG. 2, the Z direction is the thickness direction of the pad 1A.

  The pad 1A is divided into an abdominal part A, a dorsal part B, and a crotch part C. Specifically, as shown in FIG. 1, the pad 1 </ b> A includes a ventral portion A disposed on the wearer's abdomen when the pad 1 </ b> A is worn, and a back disposed on the wearer's back when the pad 1 </ b> A is worn. The side part B and the crotch part C located between the ventral part A and the dorsal part B are provided. Here, the “crotch part C” refers to a region facing the excretion part of the wearer including a urine receiving part, which will be described later, and when there is no so-called wing part like the pad 1A, an incontinence pad. This means a region surrounded by two fold lines extending in the X direction, which is generated when an absorbent article such as the above is folded into an individual packaging form. Further, when the product length of the absorbent article is long and three fold lines are generated, the area surrounded by the first fold line and the second fold line from the front end in the Y direction, or the front end in the Y direction is counted. It means a region surrounded by the first fold line and the third fold line. In the case where the absorbent article has a so-called wing part, the “crotch part C” means a region where the wing part is located. A wing part said here says the site | part used by bend | folding and fixing in the crotch part of a wearer's shorts. A well-known slip stopper (not shown) for fixing the shorts is applied to the non-skin facing surface side of the wing portion. Specifically, a material having a styrene polymer, a tackifier, or a softener as a main component can be used as the slip stopper. Further, a slip stopper (not shown) for fixing the pad 1A to a crotch portion (not shown) of underwear or the like is applied to the non-skin facing surface of the back sheet 3 to the pad 1A.

  As shown in FIG. 1, each of the top sheet 2 and the back sheet 3 included in the pad 1 </ b> A has a vertically long shape that is long in the longitudinal direction (Y direction). In the pad 1 </ b> A, the top sheet 2 covers the entire skin facing surface of the absorbent body 4 that is long in the longitudinal direction (Y direction), and extends from the outer peripheral edge of the absorbent body 4. And as shown in FIG. 3, the surface sheet 2 has the extension part extended from the front-back end of the longitudinal direction (Y direction) of the absorber 4 in a longitudinal direction (Y direction). Moreover, as shown in FIG. 2, in the width direction (X direction), it is folded | folded by the non-skin opposing surface side of the absorber 4 along the both-sides edge part along the longitudinal direction (Y direction) of the absorber 4. Yes.

  In the pad 1A, the back sheet 3 has a contour that matches the contour of the main body of the pad 1A in each of the abdominal portion A, the back portion B, and the crotch portion C. The back sheet 3 covers the entire surface of the non-skin facing surface of the absorbent body 4 that is long in the longitudinal direction (Y direction). In the longitudinal direction (Y direction), the back surface sheet 3 has extending portions that extend from the front and rear ends of the absorbent body 4 in the longitudinal direction (Y direction). And the extension part of the longitudinal direction (Y direction) of the back surface sheet 3 and the extension part of the longitudinal direction (Y direction) of the surface sheet 2 are adhesives, such as a heat embossing process, an ultrasonic sealing process, or a hot melt. The sealing part 7 is formed in the outer peripheral edge part of each of the ventral part A and the dorsal part B. In the pad 1A, the seal portion 7 is formed in an arc shape protruding outward in the longitudinal direction (Y direction). In the width direction (X direction), the back sheet 3 is fixed to the non-skin facing surface of the absorbent body 4 with an adhesive such as hot melt, and both sides on the outer side (absorber body) in the width direction (X direction). 4 (both sides along the longitudinal direction (Y direction)) are joined to the folded back sheet 2 by an adhesive such as hot melt.

  In the pad 1A, the absorbent body 4 is formed by covering the entire surface of the absorbent core 41 on the skin facing surface side and the entire surface of the non-skin facing surface side with a core wrap sheet 42. The absorbent core 41 is formed by holding water-absorbing polymer particles in an aggregate of fibers such as pulp fibers (which may be a nonwoven fabric). The absorbent core 41 extends in the longitudinal direction (Y direction) from the abdominal side A to the back side B, and in the pad 1A, the length of each of the abdominal side A and the back side B is long. The ends in the direction (Y direction) are formed in a circular arc shape protruding outward in the longitudinal direction (Y direction) according to the shape of the arc-shaped seal portion 7. The core wrap sheet 42 prevents leakage of the forming material of the absorbent core 41, and various known materials can be used. For example, thin paper such as tissue paper or water-permeable nonwoven fabric is preferably used. . Examples of the nonwoven fabric used as the core wrap sheet 42 include a spunbond nonwoven fabric, an air-through nonwoven fabric, and a spunbond-meltblown-spunbond (SMS) nonwoven fabric.

  A leak-proof cuff sheet is disposed on the top sheet 2 on the skin facing surface side of the wearer in the pad 1A. The leak-proof cuff sheet has a vertically long shape, and the longitudinal direction of the sheet is aligned with the longitudinal direction Y of the pad 1A, and is disposed at the left and right side regions in the width direction X of the pad 1A. The leak-proof cuff sheet can generally be composed of a single sheet material, but can be used in a state in which one sheet is folded in two to form two plies, or different types 2 A laminate of two or more sheet materials can be used. As the sheet for leak-proof cuff, for example, a liquid non-permeable nonwoven fabric or a laminate of a plurality of types of nonwoven fabrics can be used. Specifically, a spunbond nonwoven fabric, a meltblown nonwoven fabric, or a spunbond-meltblown-spunbond nonwoven fabric can be used.

<Wetting detection area>
As shown in FIG. 1 and FIG. 3, the pad 1 </ b> A of the first embodiment has a wetness detecting means 51 that visually changes by contact with moisture in the abdominal side A and the back side B. And the absorbent core 41. Specifically, the wetness detection means 51 is disposed on the skin facing surface side of the core wrap sheet 42 between the topsheet 2 and the absorbent core 41. The indicator used for the wetness detection means 51 can use what reacts to water | moisture contents, such as urination, For example, what consists of a hydrophilic composition containing the coloring indicator which a color changes with a change of pH is mentioned. Further, there is a method in which the wetness detection means 51 applied by applying water-decomposable ink causes the ink to hydrolyze due to urination and the color disappears. Furthermore, it is possible to apply a poorly water-decomposable colored ink and apply a water-decomposable white ink so as to cover the colored ink. In that case, the white ink is hydrolyzed by urination, and the covered colored ink appears.

  “Visible” means that the visual change of the wetness detection region 5 can be recognized by the naked eye through the surface sheet 2 from the surface sheet 2 side. In the pad 1A of the first embodiment, the top sheet 2 in the back side portion B and the crotch portion C has high light transmittance so that the visual change of the wetness detection region 5 can be visually recognized. As the light transmittance index, the opacity measured according to JIS P8138 is preferably 50% or less, more preferably 40% or less, and further preferably 30% or less.

  As shown in FIGS. 1 and 3, the wetness detection area 5 is provided at both end portions 10 a and 10 b in the longitudinal direction (Y direction) avoiding the urine receiving portion disposed opposite to the wearer's liquid excretion portion (urethral orifice). It extends in the width direction (X direction). In addition, the wetness detection region 5 is arranged so as to at least partially overlap the absorbent core 41 in the thickness direction in order to prevent excrement from leaking from the pad at the same time as discoloration occurs. Here, the urine receiving portion is a region of the pad 1A that faces the urination portion of the wearer, and is in the center in the longitudinal direction (Y direction) of the crotch portion C of the pad 1A.

  In the pad 1A of the first embodiment, as shown in FIG. 3, the wetness detection means 51 is arranged on the skin facing surface side of the core wrap sheet 42 that wraps the absorbent core 41, but in the thickness direction (Z direction). ) In any location between the topsheet 2 and the absorbent core 41. For example, the wetness detection means 51 may be applied by applying a hydrophilic composition including an indicator to the non-skin facing surface side of the topsheet 2 or the skin facing surface side of the absorbent core 41. In particular, from the viewpoint of elution of the hydrophilic composition used in the wetting detection means 51 and avoiding contact with the wearer's skin through the surface sheet 2, and from the viewpoint of facilitating the manufacture of the pad 1A, The detecting means 51 is preferably formed by applying to the skin facing surface side of the core wrap sheet 42.

<Liquid diffusion prevention area>
The liquid diffusion prevention area 6 is provided on the center side in the planar direction of the pad 1A from the wetness detection area 5. Specifically, as shown in FIG. 1 and FIG. 3, the liquid diffusion prevention region 6 is located on the center side in the longitudinal direction (Y direction) from the wetting detection region 5, avoiding the urine receiving portion, and in the width direction ( (X direction). In the pad 1A of the first embodiment, as shown in FIGS. 1 and 3, the liquid diffusion prevention region 6 is formed in the thickness direction by embossing that thermocompresses from the surface sheet 2 to the core wrap sheet 42 that wraps the absorbent core 41. Is formed. The embossment in the liquid diffusion preventing region 6 of the first embodiment is formed by thermocompression bonding from the topsheet 2 side to the absorbent core 41 in the thickness direction after constituting the entire pad 1A. In addition to this, embossing may be formed only on the member in advance, and then the entire pad may be configured. The shape of the liquid diffusion preventing region 6 is not limited to a linear shape, and a pattern such as a figure or a pattern may be formed as shown in FIG. From the viewpoint of preventing a small amount of moisture from diffusing more than necessary in the member and causing a visual change, liquid diffusion is continuously prevented in the thickness direction from the top sheet 2 to at least the depth at which the wetting detection means 51 is disposed. It is desirable to arrange the region 6.
The liquid diffusion preventing region 6 is formed by embossing in the first embodiment, but is not limited thereto. For example, the liquid diffusion preventing region 6 can be formed by attaching a resin or an adhesive so as to fill the voids between the fibers constituting the top sheet 2 and the like and forming a hydrophobic region. Moreover, a hydrophobic area | region can also be formed by thermocompression-bonding the fiber which comprises the surface sheet 2 etc. using various thermocompression-bonding means. Specifically, it may be formed by fusion means such as heat embossing, ultrasonic embossing, and high frequency embossing. In particular, from the viewpoint of processability and aesthetics, the liquid diffusion prevention region 6 is preferably formed by embossing.

  The liquid diffusion preventing region 6 preferably extends in a direction parallel to the direction in which the wetting detection region 5 extends in the planar direction. Specifically, in the pad 1A, as shown in FIG. 1, since the wetting detection region 5 extends over the entire region in the width direction (X direction), the liquid diffusion prevention region 6 also extends in the width direction (X Direction). The region where the liquid diffusion preventing region 6 extends will be described in detail. The liquid diffusion preventing region 6 is preferably formed so as to occupy almost the entire width direction (X direction) of the absorbent core 41. The substantially entire region in the width direction (X direction) of the absorbent core 41 does not necessarily require that the liquid diffusion prevention region 6 strictly crosses the entire width direction (X direction) of the absorbent core 41. . It is only necessary to prevent the excrement from diffusing and reaching the wetness detection region 5 in the region where the liquid diffusion prevention region 6 is not disposed. Therefore, specifically, the liquid diffusion prevention region 6 is formed to occupy 60% or more in the width direction (X direction) of the absorbent core 41, and preferably occupies 80% or more. In particular, from the viewpoint of reliably preventing excrement from diffusing and reaching the wetness detection region 5, the liquid diffusion prevention region 6 is formed to occupy 100% of the width direction (X direction) of the absorbent core 41. Most preferred.

Here, with reference to FIGS. 1-3, the process in which the wetness detection area | region 5 causes a visual change is demonstrated.
In 1st Embodiment, the liquid excreted by the urine receiving part permeate | transmits the surface sheet 2 in the crotch part C, and spread | diffuses in the thickness direction (Z direction). Thereafter, the liquid diffuses in the width direction and reaches the abdominal side A and the back side B existing before and after the crotch C. If the amount of liquid excreted is small, the diffusion is inhibited by the liquid diffusion preventing area 6 disposed in the ventral side A and the back side B, and cannot reach the wetting detection area 5. On the other hand, if the amount of liquid excreted is large, the liquid avoids the liquid diffusion prevention region 6, overflows from the surface sheet 2 side in the thickness direction (Z direction), or moves into the absorbent core 41, and then in the planar direction. Spread. Thereby, the liquid reaches the wetness detection region 5 and a visual change is caused. In addition, since the liquid that has reached the wetness detection region 5 is absorbed by the absorbent core 41 that overlaps the region in the thickness direction (Z direction), immediately after a visual change occurs. There is no leakage.

  Although the case where the excrement is prevented from diffusing in the member has been described, not only the diffusion in the member but also a small amount of excrement is prevented from reaching the wetness detection region 5 through the water-repellent three-dimensional gather. Therefore, the embossment of the liquid diffusion prevention region 6 is continuously arranged between both end portions in the width direction of the absorbent core 41 (also referred to as both side portions along the longitudinal direction of the absorbent core 41) 41s, 41s, and It is preferable to be arranged so as to straddle the end 41s. The liquid diffusion preventing region 6 shown in FIG. 1 extends outward in the width direction (X direction) across each end 41s, and extends across the entire width direction (X direction) of the pad 1A. ing.

A material for forming the pad 1A of the first embodiment will be described.
As the top sheet 2 and the back sheet 3, those used for absorbent articles such as incontinence pads can be used without particular limitation. For example, a liquid-permeable nonwoven fabric, an apertured film, or a laminate of these can be used as the top sheet 2, and a resin film or a laminate of a resin film and a nonwoven fabric can be used as the back sheet 3. Can do.

  As an application example, a sublayer sheet may be disposed between the top sheet 2 and the absorbent core 41. In that case, the wetness detection means 51 may be formed on one or both surfaces of the sublayer sheet. Further, the wetness detection means 51 may be applied by inserting another member soaked in advance with the hydrophilic composition between the topsheet 2 and the absorbent core 41. Examples of the sublayer sheet include a hydrophilic nonwoven fabric and a hydrophilic short fiber aggregate. As the nonwoven fabric, it is preferable to use a bulky material, specifically, an air-through nonwoven fabric or an airlaid nonwoven fabric from the viewpoint of absorbability. As the hydrophilic short fiber aggregate, it is preferable to use a pulp sheet having a high density.

  As elastic members for forming three-dimensional gathers, thread-like expansion and contraction made of natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene, etc. Can be used. Examples of the material for forming the three-dimensional gathers include nonwoven fabrics, film sheets, papers, etc., and liquid non-permeable or non-permeable hydrophobic nonwoven fabrics, leak-proof film sheets, etc. are preferably used from the viewpoint of leak-proof properties. It is done.

  As the adhesive used for fixing the elastic member for forming the three-dimensional gathers, any adhesive can be used without particular limitation as long as it is usually used for absorbent articles such as incontinence pads. The fixing portion between the topsheet 2 and the three-dimensional gather is usually formed by joining the topsheet 2 and the three-dimensional gather using an adhesive, heat fusion or the like used for absorbent articles such as incontinence pads.

The effect at the time of using the pad 1A of 1st Embodiment of this invention mentioned above is demonstrated.
In the pad 1A of the first embodiment, as shown in FIG. 1, a wetness detection region 5 visible from the skin facing surface side extends in the width direction at both end portions 10a and 10b in the longitudinal direction of the pad 1A, Further, a liquid diffusion preventing region 6 extending in the same width direction is disposed on the urine receiving portion side. Therefore, when the wearer excretes in a small amount that does not require pad replacement, it is prevented that the wearer diffuses in the member such as the topsheet 2 and reaches the wetness detection region 5. Therefore, a visual change occurs in contact with the wetness detection area 5 only when the pad is excreted in such a large amount that it is necessary to replace the pad, and the wearer can be notified of the correct pad replacement time.

  Further, in the pad 1A of the first embodiment, as shown in FIG. 3, the wetting detection means 51 is disposed on the core wrap sheet 42 that wraps the absorbent core 41, and exists on the absorbent core 41 in the thickness direction. As soon as a visual change occurs, the pad's ability to absorb is not lost. Therefore, even if the excrement reaches the wetness detection area 5 and then excretes again until the discoloration can be confirmed by dropping the shorts, it is possible to prevent the excrement from leaking from the pad.

Next, an incontinence pad according to another embodiment of the present invention will be described with reference to FIGS.
Regarding incontinence pads 1B to 1C (hereinafter also referred to as "pad 1B" to "pad 1C") of other embodiments, differences from incontinence pad 1A of the first embodiment will be described. The points that are not particularly described are the same as those of the incontinence pad 1A of the first embodiment, and the description of the incontinence pad 1A of the first embodiment is appropriately applied. In addition, with respect to the operational effects, differences from the effects of the pad 1A of the first embodiment will be described. The points that are not particularly described are the same as the effects of the pad 1A of the first embodiment, and the description of the effects of the pad 1A of the first embodiment is applied as appropriate.

In the pad 1B of the second embodiment, as shown in FIG. 4, the wetting detection region 5 extends in the longitudinal direction at both ends in the width direction of the pad 1A (both sides along the longitudinal direction (Y direction) of the pad 1A). A liquid diffusion prevention region 6 extending in the longitudinal direction is disposed on the center side in the width direction from the wetness detection region 5.
When the mounting position of the pad 1B is shifted in the width direction due to intense exercise or the like, excrement is likely to leak from the crotch part C even when the excretion amount does not reach the set capacity of the pad 1B. Therefore, in the pad 1B of the second embodiment, the replacement of the pad 1B can be urged before the excrement leaks from the crotch part C.

In the incontinence pad 1C of the third embodiment, as shown in FIG. 5, the wetting detection region 5 and the liquid diffusion prevention region 6 extend in the longitudinal direction (Y direction) both ends 10a and 10b in the width direction (X direction). It is arranged. Here, when one wetting detection region 5 and one liquid diffusion prevention region 6 adjacent to the one wetting detection region 5 have a pair of configurations, the two pairs of the configurations are in the longitudinal direction (Y direction). It exists adjacent.
Thereby, the wearer can know the replacement timing of the pad 1C step by step. Specifically, it can be determined whether or not the pad 1C should be replaced immediately before the user becomes unable to replace the pad for a long time.
Furthermore, the two pairs of configurations preferably have different visual changes. Different visual changes means that when the liquid reaches the wetness detection area 5, the color of each area is different, or one of them is colored and the other loses its color. Means.
As a result, it is possible to know the time before the pad 1C replacement time, so by changing the mounting position of the pad 1C before excrement leaks from the pad 1C, the time until the pad 1C replacement time Can be adjusted.

  In addition to the incontinence pads 1 </ b> A to 1 </ b> C of the first to third embodiments, as shown in FIG. 6A to FIG. Such an arrangement is preferable from the viewpoint of providing a gradual visual change in the amount of urination like the pad 1C, and from the viewpoint of aesthetics. However, the first embodiment in which the boundary between the liquid diffusion prevention region 6 and the wetting detection region 5 is linear is most preferable from the viewpoint of allowing the user to easily recognize visual changes.

  The incontinence pad that is an embodiment of the absorbent article of the present invention is not limited to the incontinence pads 1A to 1C of the first, second, and third embodiments described above, and can be changed as appropriate. Moreover, each component in incontinence pad 1A-1C of the above-mentioned 1st, 2nd, 3rd embodiment can be implemented in combination suitably, in the range which does not impair the meaning of this invention.

For example, the incontinence pads 1A to 1C of the first, second, and third embodiments described above are incontinence pads that do not have wings as shown in FIG. 1, but may have wings.
The absorbent article of the present invention is meant to include incontinence pads, urine-absorbing pads, sanitary napkins, diapers and the like, and in particular, incontinence pads as described in the first, second and third embodiments, or physiological It means a napkin for use.

  Further, in the incontinence pads 1A to 1C of the first, second, and third embodiments described above, the wetting detection material is applied on the core wrap sheet 42 that wraps the absorbent core 41. Sensing material may be added only to the side edges. Specifically, a pad made of paper or non-woven fabric is impregnated with a hydrophilic composition containing an indicator in advance, and the sheet is inserted between the absorbent core 41 and the surface sheet 2 to obtain the pad 1. Can do.

  In addition, the description omitted in one embodiment and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately applied between the embodiments. Can be substituted for each other.

The present invention further discloses the following embodiments with respect to the above-described embodiments.
<1> A liquid-permeable surface sheet disposed on the skin-facing surface side, a liquid-impermeable surface sheet disposed on the non-skin-facing surface side, and an absorbent core disposed between these sheets An absorbent article provided,
At least one of both ends in the longitudinal direction and both ends in the width direction of the absorbent article has a wetness detection region provided with wetness detection means visible to the wearer,
The wetness detection region is arranged so that at least a part thereof overlaps with the absorbent core in the thickness direction,
An absorbent article in which a liquid diffusion prevention area is provided on the center side in the planar direction of the article from the wetness detection area.

<2> The absorbent article according to <1>, wherein the wetness detection means is provided with a hydrophilic composition containing a color indicator whose color changes with a change in pH.
<3> The absorbent article according to <1> or <2>, in which the wetting detection unit is disposed between the topsheet and the absorbent core.
<4> The absorbent article further includes a core wrap sheet that wraps the absorbent core,
The absorbent article according to <3>, wherein the wetness detection means is disposed on the skin contact surface side of the core wrap sheet.
<5> The absorbent article according to <3>, wherein the wetness detection means is disposed on the non-skin contact surface side of the topsheet.

<6> The absorbent article according to <3>, wherein the wetting detection means is disposed on the skin contact surface side of the absorbent core.
<7> The absorbent article further includes a sublayer sheet between the topsheet and the absorbent core,
The absorbent article according to <3>, wherein the wetness detection means is disposed on one or both of the skin contact surface side and the non-skin contact surface side of the sublayer sheet.
<8> A sublayer sheet is provided between the top sheet and the absorbent core,
The absorbent article according to <3>, wherein the hydrophilic layer is impregnated in the sublayer sheet.
<9> The liquid diffusion prevention region according to any one of <1> to <8>, wherein the liquid diffusion prevention region is continuously arranged in the thickness direction from the top sheet to at least a depth at which the wetting detection unit is applied. Absorbent articles.
<10> The absorbent according to any one of <1> to <9>, wherein the liquid diffusion prevention region extends in a direction parallel to a direction in which the wetting detection region extends in a planar direction. Goods.

<11> The absorbent article according to any one of <1> to <10>, wherein the wetting detection region is disposed extending at least at both ends in the width direction in the longitudinal direction.
<12> The absorbent article according to any one of <1> to <10>, wherein the wetting detection region is arranged extending in the width direction at both ends in the longitudinal direction.
<13> The absorbent article according to <12>, wherein the wetting detection region is continuously extended in the width direction.
<14> The absorbent article according to <12> or <13>, wherein the liquid diffusion preventing region occupies 60% or more in the width direction of the absorbent core, preferably 80% or more, more preferably 100%. .
<15> When one wet detection region and one liquid diffusion prevention region adjacent to the wet detection region are configured as a pair, two or more pairs of the configurations are disposed adjacent to each other in the longitudinal direction. The absorbent article according to any one of <12> to <14>.
<16> The absorbent article according to <15>, wherein the two pairs of configurations have different visual changes.

<17> The liquid diffusion prevention region extending in the width direction is continuously disposed between both end portions in the width direction of the absorbent core and is formed across the end portions from <12> to < The absorbent article according to any one of 16>.
<18> The absorbent article according to any one of <1> to <17>, wherein the liquid diffusion prevention region is formed by thermocompression bonding.
<19> The absorbent article according to any one of <1> to <18>, wherein the shape of the liquid diffusion prevention region forms a figure or a handle.
<20> The absorbent article according to any one of <1> to <19>, wherein the opacity of the surface sheet is 50% or less, preferably 40% or less, more preferably 30% or less.
<21> The absorbent article according to any one of <1> to <20>, wherein the absorbent core is formed of pulp fibers and water-absorbing polymer particles.
<22> The absorbent article according to any one of <1> to <21>, wherein the skin contact surface side of the topsheet has a leakproof cuff.
<23> The absorbent article according to any one of <1> to <22>, wherein the absorbent article is an incontinence pad or a sanitary napkin.
<24> The absorbent article according to any one of <1> to <23>, wherein the incontinence pad has a wing portion.
<25> The absorbent article according to any one of <1> to <24>, wherein an adhesive is applied to the non-skin facing surface side of the wing portion.
<26> The absorbent article according to any one of <1> to <25>, wherein an adhesive is applied to the incontinence pad on the non-skin facing surface of the back sheet.

1A, 1B, 1C Incontinence pad (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 41 Absorbent core 41s End part of width direction (side part along longitudinal direction)
42 Core Wrap Sheet 5 Wetting Detection Area 51 Wetting Detection Means 6 Liquid Diffusion Prevention Area 7 Seal Part 10a End 10b on the Abdominal Side in the Longitudinal Direction (Y Direction) End on the Back Side in the Longitudinal Direction (Y Direction) 10s end in the width direction (side along the longitudinal direction)
A ventral side B dorsal side C inseam

Claims (8)

Absorption comprising a liquid permeable top sheet disposed on the skin facing surface side, a liquid permeable back sheet disposed on the non-skin facing surface side, and an absorbent core disposed between these sheets A sex product,
At least one of both ends in the longitudinal direction and both ends in the width direction of the absorbent article has a wetness detection region provided with wetness detection means visible to the wearer,
The wetness detection region is arranged so that at least a part thereof overlaps with the absorbent core in the thickness direction,
An absorbent article in which a liquid diffusion prevention area is provided on the center side in the planar direction of the article from the wetness detection area.   The absorbent article according to claim 1, wherein the wetting detection means is disposed between the topsheet and the absorbent core.   3. The absorbent article according to claim 1, wherein the liquid diffusion prevention region is continuously arranged in the thickness direction from the top sheet to at least a depth at which the wetness detection unit is applied.   The absorbent article according to claim 1, wherein the liquid diffusion prevention region extends in a direction parallel to a direction in which the wetting detection region extends in a planar direction.   The absorptive article according to any one of claims 1 to 4, wherein the wetness detection region is arranged extending in the width direction at both ends in the longitudinal direction.   The said liquid diffusion prevention area | region extended in the width direction is continuously arrange | positioned between the both ends of the width direction of the said absorptive core, and the absorptivity of Claim 5 formed ranging over each said edge part. Goods.   The absorbent article according to claim 1, wherein the liquid diffusion prevention region is formed by thermocompression bonding.   The absorbent article according to any one of claims 1 to 7, wherein the absorbent article is an incontinence pad or a sanitary napkin.

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