WO2020105654A1

WO2020105654A1 - Absorbent article

Info

Publication number: WO2020105654A1
Application number: PCT/JP2019/045344
Authority: WO
Inventors: 友美磯貝; 坂口　智; 拓也深山; 祐介山川
Original assignee: ユニ・チャーム株式会社
Priority date: 2018-11-22
Filing date: 2019-11-20
Publication date: 2020-05-28
Also published as: TW202027699A; JP2020081340A; CN113164294A

Abstract

An absorbent article (1) has, when extended, a longitudinal direction, a width direction, and a thickness direction, and has an absorption body (21). The absorbent article (1) has, positioned closer to the non-skin side in the thickness direction than an absorption body (1), a feces indicator (40) which shows a predetermined reaction when coming into contact with feces, and a urine indicator (50) which shows a reaction different from the predetermined reaction when coming into contact with urine. The feces indicator (40) and the urine indicator (50) are arranged at different positions in the longitudinal direction and the width direction.

Description

Absorbent article

The present invention relates to absorbent articles.

A disposable diaper is known as an example of an absorbent article. Some such disposable diapers have an indicator function for visualizing the amount of excrement absorbed and informing the user of the replacement time. For example, in Patent Document 1, a urination indicator that changes color by contact with urine is provided between the absorber of the diaper and the back sheet, and the exterior nonwoven fabric is compacted at a portion overlapping with the urine indicator. , A disposable diaper with improved visibility of the indicator is disclosed.

JP, 2012-100886, A

According to the disposable diaper of Patent Document 1, a user (for example, a person wearing a diaper on a wearer) can visually recognize from the outside of the diaper that urination has been performed. However, with the conventional indicator as in Patent Document 1, although urination can be detected, defecation cannot be detected. Even if defecation can be detected, it is not possible to distinguish whether excretion is urine or feces, and the user cannot recognize that defecation has been performed from the outside of the diaper. was difficult. Therefore, it is difficult for the user to notice that defecation has been performed, and there is a risk that the feces may leak from the diaper or the excreted feces may adhere to the skin of the wearer for a long time to cause skin troubles. ..

The present invention has been made in view of the above conventional problems, and an object thereof is to provide an absorbent article including an indicator that can detect urination and defecation separately. is there.

The main invention for achieving the above object is an absorbent article having a longitudinal direction, a width direction, and a thickness direction in a developed state, and having an absorbent body, wherein the thickness direction of the absorbent article is higher than that of the absorbent body. On the skin side, a stool indicator that exhibits a predetermined reaction by contact with stool, and a urine indicator that exhibits a reaction different from the predetermined reaction by contact with urine, and in the longitudinal direction and the width direction. The absorbent article is characterized in that the stool indicator and the urine indicator are arranged at different positions.

Other features of the present invention will be made clear by the description of the present specification and the accompanying drawings.

According to the present invention, it is possible to provide an absorbent article provided with an indicator capable of separately detecting urination and defecation.

It is a top view in the state where the tape type disposable diaper 1 was expanded and extended. FIG. 2 is a sectional view taken along line AA shown in FIG. 1. It is a figure showing the modification of the stool indicator 40 and the urine indicator 50. It is a figure showing the modification of the stool indicator 40 and the urine indicator 50. It is a figure showing the modification of the stool indicator 40 and the urine indicator 50.

At least the following matters will be made clear by the present specification and the description of the accompanying drawings.
An absorbent article having an absorbent body having a longitudinal direction, a width direction, and a thickness direction in a developed state, and a predetermined value by contacting feces on a non-skin side in the thickness direction with respect to the absorbent body. And a urine indicator exhibiting a reaction different from the predetermined reaction when brought into contact with urine, and the stool indicator and the urine indicator are different in the longitudinal direction and the width direction. An absorbent article, which is arranged at a position.

According to such an absorbent article, when feces or urine is excreted, the reaction of the feces indicator with respect to feces and the reaction of the urine indicator with respect to urine are different. By visually recognizing, it is possible to distinguish whether the excrement is feces or urine. This makes it possible to accurately recognize the replacement timing of the absorbent article and the like.

In such an absorbent article, it is desirable that the stool indicator and the urine indicator are each formed in a strip-shaped or linear pattern.

According to such an absorbent article, the area where the color reaction has occurred is represented by the length of the band or the line, so that the user can easily visually recognize the absorbed amount of excrement.

In such an absorbent article, it is desirable that the stool indicator and the urine indicator are each formed by a pattern of patterns.

According to such an absorbent article, it is easy to visually distinguish defecation and urination from the outside of the absorbent article, and it is possible to prevent misidentification by the user.

In such an absorbent article, it is desirable that the stool indicator is formed by the pattern of the pattern reminiscent of feces, and the urine indicator is formed by the pattern of the pattern reminiscent of urine.

According to such an absorbent article, the pattern displayed on each indicator facilitates direct recall of feces or urine, and makes it easier for the user to distinguish between defecation and urination.

In such an absorbent article, it is preferable that one of the stool indicator and the urine indicator is formed by a strip-shaped or linear pattern, and the other is formed by a pattern pattern.

According to such an absorbent article, the appearance difference between the stool indicator and the urine indicator becomes clear, so that the user can easily distinguish between defecation and urination.

In such an absorbent article, it is desirable that the number of the urine indicators is larger than the number of the stool indicators.

According to such an absorbent article, by increasing the number of urine indicators, it is possible to easily detect the urine by any one of the urine indicators even when the urine flows.

In such an absorbent article, it is desirable that a pair of the urine indicators be provided on both sides of the stool indicator in the width direction.

According to such an absorbent article, urine can be easily detected by the urine indicator regardless of whether urine flows to the right or left in the width direction.

In such an absorbent article, it is desirable that a predetermined space be provided between the stool indicator and the urine indicator in the width direction.

According to such an absorbent article, since the stool indicator and the urine indicator are arranged independently, the user recognizes which of the stool indicator and the urine indicator is reacting. Easier to do. As a result, the user can know whether urination has been performed or defecation has been performed without error.

In such an absorbent article, the length of the stool indicator in the width direction is
It is desirable that it is longer than the length of the urine indicator in the width direction.

According to such an absorbent article, by increasing the width of the stool indicator as much as possible, it is possible to increase the possibility of contact between the stool indicator and stool (feces juice). As a result, the accuracy of detecting feces can be further increased.

In the absorbent article, the absorber has a low basis weight portion in the center portion in the width direction, and the basis weight of the low basis weight portion is the low basis weight portion from the outside in the width direction. It is preferable that the low grammage portion has a portion that is lower than the grammage of the adjacent regions and that the low grammage portion and the stool indicator overlap in the longitudinal direction and the width direction.

According to such an absorbent article, excreted feces (feces juice) permeate the low basis weight part of the absorbent body and move from the skin side to the non-skin side to easily reach the feces indicator. Thereby, the detectability of the stool by the stool indicator can be further enhanced.

In such an absorbent article, it is desirable that the low basis weight portion and the urine indicator do not have a overlapping portion in the longitudinal direction and the width direction.

According to such an absorbent article, since urine has higher fluidity than feces, it is easy to reach the urine indicator even when it does not pass through the low basis weight portion. Further, since the urine indicator and the low grammage portion do not overlap with each other, it is easy to prevent stool (feces juice) that has passed through the low grammage portion from coming into contact with the urine indicator. Can be less likely to be erroneously detected.

In such an absorbent article, it is desirable that the center of the stool indicator is located behind the center of the absorbent article in the longitudinal direction.

According to such an absorbent article, the position of the stool indicator is close to the wearer's anus (buttock) in the longitudinal direction. Therefore, the excreted feces can easily reach the feces indicator, and the feces detection accuracy can be further improved.

In such an absorbent article, the stool indicator has an area arranged rearward of a center of the absorbent article in the longitudinal direction and arranged in a front side of a center of the absorbent article in the longitudinal direction. It is desirable that the area is larger than the area.

With such an absorbent article, it is possible to widen the detectable range by the stool indicator in the region near the wearer's anus (the rear side in the longitudinal direction). Therefore, the stool detection accuracy can be further improved.

In such an absorbent article, the stool indicator reaction factor, which is a factor for exhibiting the predetermined reaction, and the urine indicator reaction factor, which is a factor for the urine indicator to exhibit a reaction different from the predetermined reaction, Different, it is desirable.

According to such an absorbent article, since the response to stool by the stool indicator and the response to urine from the urine indicator are different, for example, the stool indicator is difficult to react to urine and does not respond to stool. It will be easier. Therefore, it becomes easy to prevent urine and feces from being erroneously detected.

In such an absorbent article, it is desirable that the stool indicator reaction factor is a biological substance contained in the stool and the urine indicator reaction factor is the pH of the urine.

According to such an absorbent article, since the reaction factor of the stool indicator is different from the reaction factor of the urine indicator, the stool indicator may react with urine or the urine indicator may react with stool. hard. In addition, since the biological substance which is a stool indicator reaction factor is not contained in urine or the ratio of the biological substance contained in urine is small, it is possible to prevent the stool indicator from detecting urine by mistake. Therefore, it becomes easier to prevent urine and feces from being erroneously detected.

In such an absorbent article, it is desirable that the biological substance is at least one of protein, enterobacteria, bilirubin, and cation strength.

According to such an absorbent article, a biological substance such as a protein is not contained in urine, or the amount / specific gravity contained in urine is very small, so that the stool indicator reacts with the biological substance, It is possible to accurately detect stool without detecting urine.

In such an absorbent article, it is desirable that the stool indicator exhibits the predetermined reaction in response to the stool indicator reaction factor having a predetermined concentration or higher.

According to such an absorbent article, it becomes difficult for the stool indicator to react with urine. As a result, it is possible to prevent the stool indicator from erroneously detecting urine, and it is possible to accurately detect stool.

In the absorbent article, the predetermined reaction of the stool indicator and the reaction different from the predetermined reaction of the urine indicator are both color reaction, and the stool indicator comes into contact with the stool. It is desirable that the tint of the color reaction at time and the tint of the color reaction at the time when the urine indicator comes into contact with the urine are different.

According to such an absorbent article, the color tone of the stool indicator after contact with stool after coloring is different from the color tone of the urine indicator after contacting with urine, so that the user Can easily understand whether the excreted matter is urine or feces.

Such an absorbent article, having a back sheet provided on the non-skin side of the absorber, the stool indicator and the urine indicator having a color before showing the color reaction, the stool indicator and the It is desirable that at least one of the colors after the urine indicator shows the color reaction is not similar to the color of the back sheet.

With such an absorbent article, it is possible to prevent the change in color from overlapping with the color of the backsheet and becoming difficult to see when the indicator causes a color reaction in response to feces or urine. Therefore, it is possible to make it difficult for the user to overlook excretion of feces or urine.

=== Embodiment ===

As an absorbent article according to the present invention, a tape-type disposable diaper for infants will be taken as an example to explain the embodiment. However, the present invention is not limited to this, and the present invention can be applied to, for example, pants-type or pad-type disposable diapers, tape-type disposable diapers for adults, and the like.

<Basic configuration of tape-type disposable diaper 1>
FIG. 1 is a plan view of a tape-type disposable diaper 1 (hereinafter also referred to as “diaper”) in a developed and expanded state. FIG. 2 is a sectional view taken along the line AA shown in FIG. The stretched state of the diaper 1 is a stretched state in which the wrinkles formed on the diaper 1 become substantially invisible in the unfolded state of the diaper 1, and each member constituting the diaper 1 (for example, described later). The diaper 1 is in a stretched state until the size of the top sheet 22 etc.) is equal to or close to the size of the single member.

The diaper 1 of the present embodiment is a so-called open type disposable diaper, and has a front part 3, a crotch part 5, and a rear part 7, as shown in FIG. The front part 3 is a part to be located on the front part (ventral side, front waistline) of the wearer. Moreover, the rear part 7 is a part which will be located in a rear part (back side, a back waistline) of a wearer. The crotch portion 5 is a portion to be located between the front portion 3 and the rear portion 7.

In the following explanation, each direction is defined as shown in Fig. 1. That is, in the diaper 1 in the stretched state, the direction from the front part 3 to the rear part 7 is the “longitudinal direction”, and the direction orthogonal to the longitudinal direction is the “width direction”. The line BB shown in FIG. 1 is a line showing the center of the diaper 1 in the longitudinal direction. In addition, as shown in FIG. 2, the direction orthogonal to the longitudinal direction and the width direction is the "thickness direction", the side of the wearer's skin is the "skin side", and the opposite side is the "non-skin side". ..

The diaper 1 has a central band-shaped region 12, side flaps 14, leg gathers 16, and leg side gathers 17. A fastening tape 30 is attached to each of the pair of side flaps 14 at the rear portion 7.

The central strip-shaped region 12 is a strip-shaped region formed by the front portion 3, the crotch portion 5, and the rear portion 7 and located at the center portion in the width direction (see FIG. 1). The central band-shaped region 12 is a part that absorbs and holds liquid such as urine excreted by the wearer. The central band-shaped region 12 has a vertically long shape (a shape along the longitudinal direction) that includes the liquid retaining absorbent body 21. The central band-shaped region 12 is mainly composed of an absorbent body 21, a liquid-permeable topsheet 22 that covers the absorbent body 21 from the skin side, and a liquid-impermeable backsheet 23 that covers the absorbent body 21 from the non-skin side. , And an exterior sheet 27 (for example, non-woven fabric) that forms the exterior of the diaper 1 (see FIG. 2). The central belt-shaped region 12 is further provided with a liquid-permeable second sheet 35, but the second sheet 35 may not necessarily be provided.

As shown in FIG. 2, the absorbent body 21 of the present embodiment covers the absorbent core 24 that absorbs excrement such as urine, and the absorbent core 24 from both the skin side and the non-skin side in the thickness direction. It has a liquid-permeable core wrap sheet 25. Examples of suitable materials for the core wrap sheet 25 include tissue paper and non-woven fabric. However, these core wrap sheets 25 are not essential components.

The absorber 21 (absorbent core 24) is arranged over the front part 3, the crotch part 5, and the rear part 7. The absorbent core 24 of the present embodiment has a substantially hourglass shape in plan view as an example of the predetermined shape. As the liquid absorbent material forming the absorbent core 24, for example, liquid absorbent fibers such as pulp fibers and liquid absorbent particles such as super absorbent polymer (so-called SAP) can be used. Further, it may contain a liquid absorbent material other than the liquid absorbent fiber and the liquid absorbent granular material.

The side flaps 14 are portions located on both sides in the width direction of the central belt-shaped region 12. The side flaps 14 are formed over the front portion 3, the crotch portion 5, and the rear portion 7 (see FIG. 1). The length (width) of the side flaps 14 in the crotch portion 5 in the width direction is smaller than the length (width) of the side flaps 14 in the front portion 3 and the rear portion 7 in the width direction. The side flap 14 is mainly composed of a skin side sheet 26 and a back sheet 23 (see FIG. 2). The skin-side sheet 26 is a member on the skin side formed over the front portion 3, the crotch portion 5, and the rear portion 7, and is made of, for example, a nonwoven fabric. The skin side sheet 26 is also a member that constitutes the leg side gathers 17 (three-dimensional gathers), and a portion outside the skin side sheet 26 (a portion outside the joint portion 26A shown by the broken line in FIG. 1) is the side flap 14. Make up.

At least in the crotch region 5 of the central belt-shaped region 12, between the absorber 21 and the back sheet 23, a pair of elastic members 28 around the leg (for example, rubber thread) that can expand and contract in the longitudinal direction is provided. The leg elastic members 28 are members that impart elasticity to the central band-shaped region 12 of the crotch portion 5. In the present embodiment, the leg-surrounding elastic member 28 is attached in a state of being elongated in the longitudinal direction. As a result, the leg elastic members 28 exert a contracting force along the longitudinal direction on the crotch portion 5 of the central band-shaped region 12.

The pair of side flaps 14 are provided with leg gather elastic members 15 that expand and contract along the longitudinal direction. The leg gather elastic member 15 is an elastic member that expands and contracts along the longitudinal direction, and is a member that imparts elasticity to the leg openings when the diaper 1 is worn. That is, the leg gather elastic member 15 is a leg elastic member that fits the leg run portion of the diaper 1 to the wearer's leg. Further, the leg gathers 16 are configured by the leg gather elastic members 15 imparting elasticity to the skin side sheet 26 and the back sheet 23 of the crotch portion 5.

The leg side gathers 17 are three-dimensional gathers that prevent liquid from leaking from the gap between the legs. The pair of leg side gathers 17 are formed along the longitudinal direction over the front portion 3, the crotch portion 5, and the rear portion 7 (see FIG. 1). The leg side gathers 17 are formed inside the side flaps 14 so as to cover both edges of the central band-shaped region 12.

The leg side gathers 17 (three-dimensional gathers) are mainly composed of the inner part in the width direction of the skin side sheet 26 (see FIG. 2). The inner edge of the skin-side sheet 26 of the crotch portion 5 has elasticity due to the leg side gather elastic member 18 such as thread rubber. The skin-side sheet 26 is joined along the longitudinal direction at a joining portion 26A between the central strip 12 and the side flap 14. When the diaper 1 is worn, due to the elasticity of the leg-side gather elastic member 18, the region inside the joint portion 26A of the skin-side sheet 26 rises to the wearer's skin side with the joint portion 26A as the base point, and the excrement or the like is discharged laterally. Control leakage.

The fastening tapes 30 are arranged on both sides in the width direction of the side flaps 14 in the rear part 7 of the diaper 1 (see FIG. 1). Then, by locking each fastening tape 30 to a target tape 29 (FIG. 1) described later, a waist opening and leg openings of the diaper 1 are formed, and the position of the diaper 1 with respect to the wearer's body (body). Can be fixed.

A target tape 29 is provided on the front part 3 of the central strip 12 (see FIG. 1). The target tape 29 is arranged on the non-skin side of the back sheet 23 of the front portion 3. The target tape 29 is a member that can be engaged with the fastening tape 30, and is made of, for example, non-woven fabric. The target tape 29 constitutes a target area for engaging the fastening tape 30. Instead of arranging the target tape 29 on the non-skin side of the back sheet 23, the target region may be directly formed on the outermost non-woven fabric forming the back sheet 23. Then, the diaper 1 is worn by engaging the fastening tape 30 with the target tape 29.

The diaper 1 of the present embodiment has a stool indicator 40 in the center portion in the width direction of the diaper 1, and further has a pair of urine indicators 50 spaced apart from the stool indicator 40 in the width direction outside. ing. The stool indicator 40 and the urine indicator 50 are arranged on the non-skin side of the absorber 21 in the thickness direction. The urine indicator 50 is configured as an indicator including a pH indicator that is adopted in a conventional general diaper. For example, the urine indicator 50 detects that urine is excreted by exhibiting a predetermined reaction (for example, a color reaction) by contacting urine with the pH of urine as a reaction factor (urine indicator reaction factor). .. Details of the flight indicator 40 will be described later.

<Principle of the flight indicator 40>
The stool indicator 40 is a stool indicator for absorbent articles such as the diaper 1, and causes a predetermined reaction (for example, color reaction) by contacting with a predetermined reaction factor (stool indicator reaction factor) contained in the stool. By presenting it, it is detected that the feces have been discharged. In the present embodiment, the stool indicator 40 includes a chemical component that detects a biological substance in stool, and the response of this chemical component to stool and the response to urine are different from each other, so that only stool discharge is detected. It is possible.

For example, when a biological substance (stool indicator reaction factor) detected by a chemical component contained in the stool indicator 40 is a protein, a pH indicator can be used as the chemical component. In general, a protein has a structure in which amino acids are polymerized, and since it has acidic and basic functional groups at both ends and side chains of the main chain of the protein, when a certain amount of protein or more is present, The pH indicator can be changed in color (protein error method). In the present embodiment, the pH indicator responds to stool by detecting undigested protein derived from food in stool, protein secreted from intestinal bacteria, and the like.

As a specific pH indicator, for example, tetraphenol blue can be used. In this case, when a protein is present, it binds to a free amino group in the protein to form a salt-like blue compound, and exhibits a blue color corresponding to a pH higher than the true pH. Therefore, when the stool indicator 40 containing tetraphenol blue comes into contact with stool, the color changes from yellow to blue. In addition, in order to easily cause discoloration of the pH indicator, it is desirable to preliminarily set it to an acidic side of about pH 3. Therefore, the pH indicator may include a citrate buffer or the like.

In this way, by using a predetermined pH indicator, the pH indicator does not become colored due to the pH change of urine or feces itself, and the pH indicator can be colored in response to protein. The pH indicator used in the protein error method is not limited to the above tetraphenol blue, and other pH indicators can be used. For example, bromophenol blue, bromocresol green, thymolphthalein, or the like, or another indicator can be used. Furthermore, it is desirable that the pH indicator is safe for the skin and has excellent storage stability in the presence of moisture and sunlight.

Further, in the stool indicator 40, it is desirable that the chemical components contained in the stool indicator 40 respond to stool and not to urine so as to prevent false detection of whether the excrement is stool or urine. .. Therefore, the stool indicator 40 in the present embodiment shows a reaction such as a color reaction when the stool indicator reaction factor (protein or the like) is higher than a predetermined concentration, and when the stool indicator reaction factor is lower than the predetermined concentration. Makes the reaction less likely to occur.

❖ Generally, healthy people's urine does not contain proteins, and even non-healthy people have less than 10,000 mg / L of protein in urine. Therefore, in the present embodiment, the stool indicator 50 preferably responds to a protein of 150 mg / L or more by the protein error method using a pH indicator, and more preferably responds to a protein of 5,000 mg / L or more. It is more preferable to respond to 10,000 mg / L or more of protein. For example, when the stool indicator 50 responds to a protein of 150 mg / L or more under the condition of using bromophenol blue as a chemical component, the application amount of the pH indicator per 1 cm 2 in the stool indicator 50 may be 16.3 μg. Preferably, when the stool indicator 50 responds to a protein of 5,000 mg / L or more, the applied amount of the pH indicator per 1 cm 2 in the stool indicator 50 is preferably 0.5 μg, and the stool indicator 50 has 10,000 mg / L. When responding to L or more proteins, the applied amount of the pH indicator per cm 2 of the stool indicator 50 is preferably 0.25 μg. By setting the applied amount of the pH indicator to be 17.0 μg or less, the safety of the stool indicator 40 for the wearer of the absorbent article is enhanced.

In the present embodiment, by adjusting the application amount of the pH indicator in this manner, the range in which the stool indicator 40 can react with stool is relatively smaller than the range in which the stool indicator 40 can react with stool. be able to. In other words, the reaction of the stool indicator 40 on stool and the reaction of the stool indicator 40 on urine can be made different. This makes it difficult for the stool indicator 40 to react with urine.

Moreover, the stool indicator 40 does not limit the above-mentioned protein as a reaction factor. For example, the ionic strength of stool, which has a correlation with the specific gravity of stool, may be used as the reaction factor. When the stool indicator reaction factor is a cation, it is preferable to use a combination of a polyelectrolyte and a pH indicator as the chemical component contained in the stool indicator 40. Here, as the cations detected by the stool indicator 40 of the present embodiment, monovalent cations such as sodium ions and potassium ions can be mainly mentioned. These cations are exchanged with protons in the polyelectrolyte, and the released protons discolor the pH indicator (cation extraction method). Therefore, this makes it possible to respond to cations in stool, preferably at a predetermined concentration or higher.

As the polymer electrolyte, it is preferable to use a water-soluble polymer compound having an acid group, and examples thereof include methoxyethylene maleic anhydride copolymer, polystyrene sulfonic acid, and polyvinyl sulfuric acid. Further, as the pH indicator, the same kind as the above-mentioned pH indicator can be used, but considering that the cation extraction method detects a proton, a pH indicator having a discoloration range in an acidic range is used. Preferably. In addition, the pH of urine is usually around 6.0 and fluctuates in the range of about 5.0 to 9.0, and the pH of feces fluctuates in the range of about 4.0 to 9.0. To do. Considering that it is preferable that the pH indicator does not change color due to a change in pH of urine or feces itself, and it is preferable to change the color of the pH indicator in response to cations, in the range of pH value of 4.0 or less, the color change range It is more preferred to use a pH indicator having

Note that the stool response of the stool indicator 40 using the cation extraction method is different from that of urine, and the chemical components contained in the stool indicator 40 respond to stool and may not respond to urine. preferable. In general, humans excrete 80 mEq to 250 mEq of sodium and 38 mEq to 64 mEq of potassium in urine per day, while the daily urine volume is usually 500 mL to 2000 mL. Therefore, it is preferable that the stool indicator 40 responds to cations of 700 mEg / L or more by a cation extraction method using a combination of a polyelectrolyte and a pH indicator. For example, under the condition that bromothymol blue is used as the pH indicator, the application amount of the pH indicator per 1 cm ² in the stool indicator 40 is preferably 38.0 μg or less, and the stool indicator 40 is positively more than 700 mEg / L. In the case of responding to ions, the amount is more preferably 3.4 μg or less. By doing so, different color reaction occurs between stool and urine, and it becomes easy to suppress erroneous detection of stool and urine. By setting the amount of the pH indicator applied to 38.0 μg or less, the safety of the stool indicator 40 for the wearer of the absorbent article is increased.

Furthermore, substances derived from feces such as intestinal bacteria contained in feces and bilirubin, which is a bile pigment, may be used as reaction factors. These components are generally not contained in urine, or the amount and specific gravity contained in urine are very small as compared with stool. Therefore, as in the case where a protein is used as a reaction factor, the stool indicator 40 is less likely to react with urine and is more likely to react with stool. Therefore, the feces excreted in the diaper 1 can be accurately detected.

Further, in order to clearly indicate whether the excrement is stool or urine, a color reaction when the stool indicator 40 contacts stool and a color reaction when the urine indicator 50 contacts urine. Is desired to be different. If the color of the stool indicator 40 after contact with stool (for example, red) is the same as that of the urine indicator 50 after contact with urine (for example, red), It becomes difficult for the user to grasp at a glance whether urine is excreted or feces are excreted. Therefore, in the present embodiment, the chemical components contained in the

indicators

40 and 50 are adjusted so that the colors after coloring are different. For example, tetraphenol blue is used as the chemical component (pH indicator) of the stool indicator 40. If so, the color after reacting with stool is "blue". In this case, as the chemical component of the urine indicator 50, it is preferable to form the urine indicator 50 by using a chemical component whose color after reacting with urine is different from blue (for example, green). It should be noted that "different" in color means a state in which there is a shift of three or more hues in the hue circle of the Ostwald color system.

Furthermore, it is desirable that the color when the stool indicator 40 reacts with stool is other than “red” or “brown”. For example, the color of the stool indicator 40 before and after the color reaction is a color included in the range of “Purple” to “Yellow” (hue number: 1 to 3, 10 to 24) in the color circle of the Ostwald color system. The color is preferably in the range of “ultramarine blue” to “leaf green” (hue number: 13 to 24). Generally, the stool is brown, and therefore, if the color of the stool indicator 40 is “brown”, it may be difficult for the user to recognize whether or not the stool is detected. In addition, when the color of the stool indicator 40 is “red”, there is a risk that the user may mistakenly recognize that bloody stool has been excreted. Therefore, in the present embodiment, any color before and after the color reaction of the stool indicator 40, more preferably, the color after the color reaction is set to a color other than “red” or “brown”. This can prevent the user from making a mistake.

Similarly, it is desirable that the color when the urine indicator 50 reacts with urine is other than "red" or "yellow". For example, the color before and after the color reaction of the urine indicator 50 is a color included in the range of “Purple” to “Yellow” (hue number: 1, 10 to 24) in the color circle of the Ostwald color system. It is more preferable that the color is within the range of “ultramarine blue” to “leaf green” (hue number: 13 to 24). Since urine is generally yellow, if the color of the urine indicator 50 is “yellow”, it may be difficult for a user to visually recognize whether or not urine is detected. Further, if the color of the urine indicator 50 is “red”, there is a possibility that the urine is mistakenly recognized as excreted by the user when visually recognized. Therefore, in the present embodiment, any color before and after the color reaction of the urine indicator 50, and more preferably, the color after the color reaction is set to a color other than “red” or “yellow”. This can prevent the user from making a mistake.

Further, at least one of the color before the stool indicator 40 shows a color reaction and the color after the stool indicator 40 shows a color reaction is not similar to the color of the back sheet 23 of the diaper 1. Is desirable. Similarly, at least one of the color before the urine indicator 50 shows a color reaction and the color after the urine indicator 50 shows a color reaction is similar to the color of the back sheet 23 of the diaper 1. Not desirable. Here, the colors are “not similar” to each other, for example, in the color circle of the Ostwald color system in which the colors of the feces indicator 40 and the urine indicator 50 before and after the color reaction and the color of the back sheet 23 are 2 A state in which the hue is shifted by more than the hue. By doing so, when the

indicator

40, 50 reacts with stool or urine to cause a color reaction and the color changes, the change in the color overlaps with the color of the back sheet 23 and becomes difficult to see. Can be suppressed. Therefore, it is possible to make it difficult for the user to overlook excretion of feces or urine.

<Specific configuration of flight indicator 40>
The stool indicator 40 is formed by applying an adhesive (for example, a hot melt adhesive HMA) containing the above-mentioned chemical component (for example, a pH indicator) to the skin side surface of the back sheet 23 of the diaper 1. In the present embodiment, as shown in FIG. 1, a hot melt adhesive is applied to a strip-shaped (or linear) region along the longitudinal direction from the crotch portion 5 to the rear portion 7 at the center in the width direction by using a coater. The stool indicator 40 is formed by applying (HMA). According to such coater coating, it becomes possible to form the stool indicator 40 having a uniform film thickness and less unevenness, and the stool detection accuracy can be improved. Further, the manufacturing cost can be suppressed. Further, since the area where the color reaction has occurred is represented by the length of the band or the line, the user can easily visually recognize the absorption amount of excrement. The urine indicator 50 can be formed in the same manner.

Alternatively, the stool indicator 40 may be formed by mixing a chemical component with ink and printing-coating the back sheet 23 or the core wrap sheet 25. Further, the stool indicator 40 is formed by joining and fixing a filter paper or a non-woven fabric impregnated with a chemical component to the back sheet 23 or the core wrap sheet 25 with a hot melt adhesive (HMA) or ultrasonic welding. Is also good.

Further, in the present embodiment, since the stool indicator 40 is arranged in the center portion in the width direction, when the diaper 1 is worn, the position of the wearer's anus and the position of the stool indicator 40 in the width direction easily overlap each other. .. Therefore, when feces are excreted in the diaper 1, the water (feces juice) contained in the feces easily reaches the feces indicator 40, and the feces can be detected accurately. In addition, since feces have lower fluidity than urine, feces excreted from the anus do not easily flow in the longitudinal direction or the width direction. Therefore, even if only one (one) stool indicator 40 is provided as shown in FIG. 1, the stool detection accuracy does not easily deteriorate.

Urine, on the other hand, urine has high fluidity and is easy to flow and diffuse in the longitudinal and width directions. Therefore, in the diaper 1, two or more urine indicators 50 are provided so that even if urine flows, any one of the urine indicators 50 can detect the urine.

In addition, by disposing the urine indicators 50 on both sides in the width direction of the stool indicator 40, regardless of whether urine flows to the right in the width direction or flows to the left in the width direction. It can be detected by the urine indicator 50.

The stool indicator 40 is provided separately from the urine indicator 50 in the width direction. That is, a predetermined space is provided between the stool indicator 40 and the urine indicator 50 in the width direction. Since the stool indicator 40 and the urine indicator 50 are independently arranged, the user can easily visually identify the two, and when the excretion is performed, the fecal indicator 40 and the urine indicator 50 are It will be easier to recognize which indicator is responding. This allows the user to correctly know whether urination has been performed or defecation has been performed.

Further, in the present embodiment, the stool indicator 40 is formed such that the length (width) of the stool indicator 40 in the width direction is longer (wider) than the length (width) of the urine indicator 50 in the width direction. There is. As described above, only one stool indicator 40 is provided at the center in the width direction. Therefore, by increasing the width of the stool indicator 40 as much as possible, it is possible to increase the possibility that the stool indicator 40 will contact the stool (stool juice). As a result, the accuracy of detecting feces can be further increased.

Further, in the present embodiment, the stool indicator 40 is arranged closer to the rear side (back side) in the longitudinal direction. In other words, the stool indicator 40 is arranged such that the center of the stool indicator 40 is located rearward of the center of the diaper 1 (the position of line BB in FIG. 1) in the longitudinal direction. With this arrangement, the position of the stool indicator 40 and the wearer's anus (buttock) are close to each other in the longitudinal direction. Therefore, excreted feces can easily reach the feces indicator 40, and the feces detection accuracy can be further improved.

Further, in the stool indicator 40, the area arranged on the rear side (dorsal side) with respect to the center in the longitudinal direction (position of line BB in FIG. 1) is on the front side (ventral side) with respect to the center in the longitudinal direction. It is desirable that the area is larger than the area arranged in. That is, it is desirable that the stool indicator 40 is provided so that the area of the rear side is larger than that of the front side in the longitudinal direction. By doing so, the range in which the stool can be detected by the stool indicator 40 can be widened in the region near the wearer's anus (that is, the rear side in the longitudinal direction). Therefore, the stool detection accuracy can be further improved.

Also, the stool indicator 40 and the urine indicator 50 can be modified as follows. 3 to 5 are diagrams showing modified examples of the stool indicator 40 and the urine indicator 50.

The stool indicator 40 and the urine indicator 50 may be formed by patterns having different patterns, instead of the band-shaped pattern shown in FIG. For example, in FIG. 3, the stool indicator 40 is formed by the symbol pattern represented by the star mark, and the urine indicator 50 is formed by the symbol pattern represented by the face mark. Due to the different pattern patterns of the stool indicator 40 and the urine indicator 50, it is easy to visually distinguish defecation and urination from the outside of the diaper 1, and it is possible to prevent misidentification by the user.

Further, in FIG. 4, the pattern patterns of the stool indicator 40 and the urine indicator 50 are set to the pattern patterns reminiscent of feces and urine, respectively. Specifically, the design of the stool indicator 40 is a poop design pattern, and the urine indicator 50 is a water drop design pattern. In this way, the pattern displayed on each indicator makes it easier for the feces or urine to be directly recalled, and the user can more easily distinguish between defecation and urination.

Further, in FIG. 5, the stool indicator 40 is formed by a pattern of patterns and the urine indicator 50 is formed by a band-shaped pattern. On the contrary, the stool indicator 40 may be formed in a striped pattern and the urine indicator 50 may be formed in a pattern. Even in such a case, the appearance difference between the stool indicator 40 and the urine indicator 50 becomes clear, so that the user can easily distinguish between defecation and urination.

The patterns of the stool indicator 40 and the urine indicator 50 are not limited to the band-shaped pattern shown in FIG. 1 and the pattern patterns shown in FIGS. 3 to 5, and other patterns (for example, geometric patterns and Text information).

<About the structure of the absorber 21>
As described above, in the diaper 1 of the present embodiment, the stool indicator 40 is arranged on the non-skin side of the absorbent body 21 to detect stool. However, stool usually has high viscosity and low fluidity. It is difficult for the absorber 21 to penetrate in the thickness direction. Therefore, when the stool indicator 40 is provided on the non-skin side of the absorbent body 21, it may be difficult for stool to reach the stool indicator 40.

On the other hand, in the present embodiment, the absorber 21 has the low basis weight portion 21A in the center portion in the width direction (see FIG. 2). In the low grammage portion 21A, the grammage is lower than the grammage of the

regions

21B and 21B adjacent to the low grammage portion 21A from the outer side in the width direction. Here, the basis weight is a mass per unit area. The grammage of the low grammage portion 21A of the present embodiment is preferably about 0 to 200 g / m ² , and more preferably about 100 g / m ² . The grammage of each of the adjacent regions 21B is preferably about 370 g / m ² . When the basis weight of the low basis weight portion 21A exceeds 200 g / m ² , the basis weight is too high and it becomes difficult for feces to pass through the low basis weight portion 21A.

Then, as shown in FIG. 1, the stool indicator 40 of the present embodiment is arranged so as to have a portion overlapping the low basis weight portion 21A in the longitudinal direction and the width direction. With such a configuration, the feces (feces juice) excreted in the diaper 1 permeate the low basis weight portion 21A of the absorbent body 21 and move from the skin side to the non-skin side to easily reach the feces indicator 40. . Therefore, the stool detectability of the stool indicator 40 can be further enhanced.

On the other hand, as shown in FIG. 1, the urine indicator 50 does not have a portion that overlaps the low basis weight portion 21A in the longitudinal direction and the width direction. Urine has a higher fluidity than stool and originally tends to permeate through the absorbent body 21 in the thickness direction. Therefore, the urine excreted in the diaper 1 easily reaches the urine indicator 50 even when it does not pass through the low basis weight portion 21A. Therefore, even if the urine indicator 50 and the low basis weight portion 21A do not overlap, the urine detectability of the urine indicator 50 is unlikely to deteriorate. On the contrary, since the urine indicator 50 and the low basis weight portion 21A do not overlap with each other, it is easy to prevent the stool (feces juice) that has passed through the low basis weight portion 21A from coming into contact with the urine indicator 50. The possibility of erroneous detection of urine and feces can be further reduced.

Of course, the urine indicator 50 may have a portion overlapping the low basis weight portion 21A in the longitudinal direction and the width direction. For example, when the low basis weight portion 21A is formed wider than the stool indicator 40, the low basis weight portion 21A may overlap the urine indicator 50. In such a case, urine that has passed through the low basis weight portion 21A of the absorbent body 21 is more likely to reach the urine indicator 50, so that the urine detectability of the urine indicator 50 can be further enhanced.
=== Other Embodiments ===

Although the embodiments of the present invention have been described above, the above embodiments are for the purpose of facilitating the understanding of the present invention and not for limiting the interpretation of the present invention. Further, it is needless to say that the present invention can be modified or improved without departing from the spirit of the present invention and that the present invention includes equivalents thereof.

In the above-described embodiment, the second sheet 35 is arranged between the top sheet 22 and the core wrap sheet 25 in the thickness direction, but the diffusion sheet that diffuses the liquid between the absorbent body 21 and the stool indicator 40. You may arrange as. By doing so, the moisture of the stool that has passed through the low basis weight portion 21A can be diffused in the lower layer of the absorber 21, and the stool indicator 40 can react in a wider range. Thereby, the visibility from the outer surface of the diaper 1 can be improved.

Also, the top sheet 22 may have an opening. By having the opening, the ground contact area between the second seat 35 and the feces can be increased, and the permeability of the feces to the second seat 35 can be improved.

Further, in the above-described embodiment, the shape of the low basis weight portion 21A is a rectangular shape that is long in the longitudinal direction in the plan view shown in FIG. 1, but the shape is not limited to this. For example, a square shape, a rectangular shape elongated in the width direction, a heart-shaped pattern shape, or the like may be used.

In addition, in the above-described embodiment, the number of the low basis weight portions 21A is one in the widthwise central portion of the diaper 1, but a plurality of the low basis weight portions 21A may be provided. In this case, it is possible to further improve the detection of defecation by arranging a plurality of stool indicators 40 so as to have an overlapping portion in each of the low basis weight portions 21A in the longitudinal direction and the width direction.

Also, the number of low basis weight portions 21A may be zero. That is, the absorbent body 21 may not be provided with the low basis weight portion 21A.

1 Tape type disposable diapers (absorbent articles)
3 Front part 5 Crotch part 7 Rear part 12 Central band area 14 Side flap 15 Leg gather elastic member 16 Leg gather 17 Leg side gather 18 Leg side gather elastic member 21 Absorber 21A Low basis weight part 22 Top sheet 23 Back sheet 24 Absorbent Core 25 Core wrap sheet 26 Skin side sheet 26A Joined portion 27 Exterior sheet 28 Leg elastic member 29 Target tape 30 Fastening tape 35 Second sheet 40 Stool indicator 50 Urine indicator

Claims

Has a longitudinal direction, a width direction, and a thickness direction in a deployed state,
An absorbent article having an absorbent body,
On the non-skin side in the thickness direction of the absorber,
A stool indicator that exhibits a predetermined reaction by contact with stool,
Having a urine indicator that exhibits a reaction different from the predetermined reaction by contacting with urine,
The absorbent article, wherein the stool indicator and the urine indicator are arranged at different positions in the longitudinal direction and the width direction.
The absorbent article according to claim 1, wherein
The absorbent article, wherein the stool indicator and the urine indicator are each formed in a strip-shaped or linear pattern.
The absorbent article according to claim 1 or 2, wherein
The absorbent article, wherein the stool indicator and the urine indicator are each formed by a pattern of a pattern.
The absorbent article according to claim 3, wherein
The stool indicator is formed by the pattern of the pattern reminiscent of stool,
The said urine indicator is formed by the pattern of the said pattern which reminds urine, The absorbent article characterized by the above-mentioned.
The absorbent article according to any one of claims 1 to 4, wherein:
The absorbent article, wherein one of the stool indicator and the urine indicator is formed by a strip-shaped or linear pattern, and the other is formed by a pattern pattern.
The absorbent article according to any one of claims 1 to 5, wherein:
The absorbent article, wherein the number of the urine indicators is larger than the number of the stool indicators.
The absorbent article according to claim 6, wherein
The absorbent article, wherein a pair of the urine indicators are provided on both sides of the stool indicator in the width direction.
The absorbent article according to claim 7, wherein
An absorbent article, wherein a predetermined interval is provided between the stool indicator and the urine indicator in the width direction.
The absorbent article according to any one of claims 1 to 8, wherein:
The length in the width direction of the stool indicator is
An absorbent article, which is longer than the length of the urine indicator in the width direction.
The absorbent article according to any one of claims 1 to 9,
The absorber has a low basis weight portion in the center portion in the width direction,
The basis weight of the low basis weight portion is lower than the basis weight of a region adjacent to the low basis weight portion from the outside in the width direction,
An absorbent article having a portion where the low basis weight portion and the stool indicator overlap in the longitudinal direction and the width direction.
The absorbent article according to claim 10, wherein:
An absorbent article, characterized in that, in the longitudinal direction and the width direction, the low basis weight portion and the urine indicator do not have overlapping portions.
The absorbent article according to any one of claims 1 to 11, wherein:
The absorbent article is characterized in that the center of the stool indicator is located rearward of the center of the absorbent article in the longitudinal direction.
The absorbent article according to any one of claims 1 to 12, wherein:
The stool indicator has an area arranged rearward of the longitudinal center of the absorbent article, and is larger than an area arranged forward of the longitudinal center of the absorbent article. An absorbent article characterized by the above.
The absorbent article according to claims 1 to 13, wherein
A stool indicator reaction factor, which is a factor in which the stool indicator exhibits the predetermined reaction,
An absorbent article, wherein the urine indicator has a different urine indicator reaction factor, which is a factor causing a reaction different from the predetermined reaction.
The absorbent article according to claim 14, wherein
The stool indicator response factor is a biological substance contained in the stool,
The absorbent article, wherein the urine indicator reaction factor is the pH of the urine.
The absorbent article according to claim 15, wherein
The biomaterial is at least one of protein, intestinal bacterium, bilirubin, and cation strength.
The absorbent article according to any one of claims 14 to 16, wherein:
The absorbent article, wherein the stool indicator exhibits the predetermined reaction in response to the stool indicator reaction factor having a predetermined concentration or higher.
The absorbent article according to any one of claims 1 to 17, wherein
The predetermined reaction of the stool indicator and the reaction different from the predetermined reaction of the urine indicator are both color reaction,
The color of the color reaction when the stool indicator comes into contact with the stool,
An absorbent article, wherein the urine indicator has a different color tone from the color reaction when it contacts the urine.
The absorbent article according to claim 18, wherein:
Having a back sheet provided on the non-skin side of the absorber,
At least one of the color before the stool indicator and the urine indicator show the color reaction, and at least one of the colors after the stool indicator and the urine indicator show the color reaction, is the color of the back sheet. An absorbent article characterized by being dissimilar.