JP2016120064A - Disposable clothing article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable clothing article allowing a user to determine an appropriate change timing.SOLUTION: A clothing article (10) includes: a liquid absorbent core extending from a crotch area (13) to front/rear waist areas (11) and (12); a leakproof sheet (52) for covering the whole surface of a non-skin-facing side of the liquid absorbent core; and indicator means (15) allowing the user to discriminate presence/absence of urination from the outside. The leakproof sheet has moisture permeability and liquid impermeability. The indicator means is located at the non-skin-facing side, with respect to the leakproof sheet.SELECTED DRAWING: Figure 3

Description

  The present invention relates to disposable wearing articles such as disposable diapers, disposable toilet training pants, and disposable incontinence pants.

  2. Description of the Related Art Conventionally, a wearing article including a chassis including a liquid-absorbent core and indicator means capable of identifying the presence or absence of urination from the outside is known. For example, Patent Literature 1 discloses a wearing article including a liquid-absorbent core, a liquid-impervious leak-proof sheet that covers the entire surface of the liquid-absorbent core on the non-skin facing surface side, and indicator means. The indicator means is located between the liquid-absorbent core and the leak-proof sheet, and is attached to the liquid-absorbent core via a liquid-permeable aperture film.

JP2012-125452A

  According to the wearing article disclosed in Patent Document 1, it is possible to prevent leakage of urine absorbed in the liquid absorbent core by the leak-proof sheet, and to identify the presence or absence of urination from the outside by the indicator means. The replacement time can be determined.

  However, since the indicator means is attached to the non-skin-facing surface side of the liquid-absorbent core via a perforated film, even if it is a small amount of urination that does not require replacement of the worn article, the liquid-absorbent core Urine absorbed by the core and water vapor from the urine reach the indicator means, and the indicator means reacts faster than expected. As a result, the time when the indicator means indicates that there is urination tends to be earlier than the replacement time assumed by the user.

  Therefore, an object of the present invention is to provide a disposable wearing article provided with indicator means that is an improvement of the prior art and can determine an appropriate replacement time for the wearing article.

  In order to achieve the above object, the present invention includes a vertical direction and a horizontal direction orthogonal to each other, a skin facing surface and a non-skin facing surface located on the opposite side, a front waist region, a rear waist region, and the front and back sides. A crotch region located between the waist regions, a liquid-absorbent core extending from the crotch region to the front and rear waist regions, and a leak-proof sheet that covers the entire surface of the liquid-absorbent core on the non-skin facing surface side, It exists in improvement of the disposable wearing article containing the indicator means which can identify the presence or absence of urination from the outside.

  In the disposable wearing article according to the present invention, the leak-proof sheet is moisture-permeable and liquid-impervious, and the indicator means is located on the non-skin facing surface side with respect to the leak-proof sheet. And

  According to one or more embodiments of the disposable wearing article according to the present invention, the timing at which the indicator reacts can be controlled, and the appropriate replacement time of the wearing article can be determined.

The drawings illustrate certain embodiments of the invention according to the present disclosure and include selective and preferred embodiments as well as essential configurations of the invention.
The perspective view of the disposable diaper shown as an example of the disposable wearing article which concerns on this indication. The partial fracture | rupture expansion | deployment top view of the diaper extended to the vertical direction and the horizontal direction until the maximum expansion | extension of each elastic body (to the extent that the gathers by the contraction effect | action of an elastic body are lost). FIG. 3 is a schematic cross-sectional view taken along line III-III in FIG. 2. FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 1. The partially broken expansion | deployment top view of the diaper in the modification 1. FIG. The figure similar to FIG. 3 which shows 2nd Embodiment of a disposable diaper. The figure similar to FIG. 3 which shows 3rd Embodiment of a disposable diaper.

  The following embodiment relates to the disposable wearing article shown in FIGS. 1 to 7 as an example of the present invention, and includes not only an indispensable structure of the invention but also a selective and preferable structure. In FIG. 2, each elastic body to be described later has a natural visual perception of gathers generated in the member to which each elastic body is attached due to the contracting force in the horizontal direction X and the vertical direction Y against the contracting force. It has been stretched to such an extent that it seems to be lost.

<First Embodiment>
1 and 2, a disposable diaper 10 as an example of a disposable wearing article according to the present invention includes a longitudinal direction Y and a lateral direction X orthogonal to each other, a skin facing surface, and a non-skin facing surface on the opposite side thereof. A longitudinal axis P that bisects the length dimension in the transverse direction X and a transverse axis Q that bisects the length dimension in the longitudinal direction Y, and is substantially symmetric with respect to the longitudinal axis P, and the front waist region 11, a rear waist region 12, and a crotch region 13 located between the front waist region 11 and the rear waist region 12.

  The diaper 10 includes a chassis 14, indicator means 15 that can identify the presence or absence of urination from the outside, and a liquid absorption structure 17 that extends from the crotch region 13 to the front and rear waist regions 11 and 12 on the skin facing surface side of the chassis 14. . The chassis 14 has a concave curved shape on both side edges that define the crotch region 13, and the narrowest part of the crotch region 13 is located closer to the front waist region 11 than the horizontal axis Q. The side edge portions 11a and 11b of the front waist region 11 and the side edge portions 12a and 12b of the rear waist region 12 are connected to each other by side seams 20 that intermittently extend in the longitudinal direction Y. Leg openings 22 are defined. In the side seam 20, the overlapping sheets are fused together by a known means such as embossing / debossing by heat or ultrasonic waves.

<Chassis>
The chassis 14 has first and second end edges 16a and 16b that are spaced apart in the longitudinal direction Y, and both side edges 16c and 16d that are spaced apart in the lateral direction X, and are located on the non-skin facing surface side. A non-stretchable outer layer sheet 25 that defines the waist regions 11 and 12 and the crotch region 13 in series, and an elastic layer that is positioned inside the outer layer sheet 25 and that defines the front and rear waist regions 11 and 12 and the crotch region 13 in series. Inner layer sheet 26, first auxiliary sheet 27 located at the waist opening edge of front waist region 11, second auxiliary sheet 28 located at the waist opening edge of rear waist region 12, and both side edges of crotch region 13 Leg elastic body 29 located in the position.

The exterior sheet 25, for example, unit weight per area of a 10 to 30 g / ^{m 2,} the thermoplastic synthetic fibers in the form spunbond nonwoven fabric having a fineness of 1～8Dtex, meltblown fibers nonwoven, SMS ( Spunbond / meltblown / spunbond) non-woven fabric can be used. Examples of the thermoplastic synthetic fiber include fibers formed of a thermoplastic synthetic resin such as polyethylene, polypropylene, nylon, and polyester, and composite fibers formed of these thermoplastic synthetic resins.

The inner layer sheet 26 is formed of an elastically stretchable sheet member, and includes, for example, 20 to 60% by mass of elastic yarn and 80 to 40% by mass of inelastic yarn, and the mass per unit area. Can be used, such as a nonwoven fabric having a thickness of 10 to 40 g / m ² or a polyurethane resin film having a thickness in the range of 0.1 to 0.05 mm. As the inelastic yarn, a thermoplastic synthetic resin such as polyethylene, polypropylene, nylon, or polyester can be used. When the elastic yarn constituting the inner layer sheet 26 is a polyurethane elastic yarn, the inner layer sheet 26 has a hygroscopic property and can reduce the stuffiness when the diaper 10 is worn. The outer layer sheet 25 and the inner layer sheet 26 are joined by a known joining means such as a hot melt adhesive or welding, and when the inner layer sheet 26 contracts, the outer layer sheet 25 is gathered.

  Each of the first and second auxiliary sheets 27 and 28 is a sheet member that can elastically expand and contract in the lateral direction X, and is formed of a stretchable fiber nonwoven fabric containing elastomer fibers. The first and second auxiliary sheets 27 and 28 are joined to the inner surface of the inner layer sheet 26 in a stretched state by a known joining means such as hot melt adhesive or welding.

  The leg elastic body 29 is an elastically stretchable sheet member, and is formed of a stretchable fiber nonwoven fabric including elastomer fibers. The leg elastic body 29 is disposed along both side edges 14c and 14d of the crotch region 13, and is joined to the inner surface of the inner layer sheet 26 by a known joining means such as hot melt adhesive or welding.

<Liquid absorption structure>
2 to 4, the liquid absorbing structure 17 includes a front end edge 17 a and a rear end edge 17 b that are separated in the vertical direction Y and extend in the horizontal direction X, and both sides that are separated in the horizontal direction X and extend in the vertical direction Y. It has edges 17c and 17d, and has a front end portion 18A and a rear end portion 18B that are separated in the longitudinal direction Y, and a center portion 18C that is located between the front and rear end portions 18A and 18B. The liquid-absorbing structure 17 includes a body-side liner 50 made of a fiber nonwoven fabric having liquid permeability, a liquid-absorbing absorber 51, and a leak-proof sheet 52, which are located on the skin facing surface side.

  Absorbent body 51 includes a liquid-absorbent core formed from a mixture of fluff pulp and absorbent polymer particles, and a liquid-absorbing and diffusing core wrap sheet such as tissue paper that encapsulates the entire liquid-absorbent core. . The body side liner 50 covers the entire skin facing surface side of the absorbent body 51 and both side edges in the lateral direction X.

  The leak-proof sheet 52 covers the entire surface of the absorbent body 51 on the non-skin facing surface side, and prevents the body fluid absorbed by the absorbent body 51 from leaking out. And a liquid-impervious and moisture-permeable barrier sheet 54 located on the non-skin facing surface side of the plastic film 53. The leak-proof sheet 52 and the body side liner 50 form end flaps extending from the front end edge and the rear end edge of the absorber 51 to the outside in the longitudinal direction Y, respectively.

The plastic film 53 has liquid permeability such that the water pressure resistance specified in JIS L 1092B is 1000 mm · H ₂ O or more, and at the same time, the water vapor permeability specified in JIS Z 0208 is 3000 g / m ² · day or more. For example, a polyethylene film having a thickness of 0.01 to 0.03 mm and containing fine particles such as barium sulfate and calcium carbonate can be used. As the barrier sheet 54, for example, a nonwoven fabric formed of thermoplastic synthetic fibers having a mass per unit area of 7 to 20 g / m ² and having a fineness of 1 to 8 dtex can be used. The barrier sheet 54 is a non-woven fabric useful as a surface protecting material for the plastic film 53 and prevents the plastic film 53 from being torn or damaged, and is not indispensable in the present invention.

  The plastic film 53 and the barrier sheet 54 form a pair of side flaps extending outward in the lateral direction X from both side edges of the absorber 51, and both side portions of the barrier sheet 54 forming the side flaps are body side liners. A front fixing portion and a rear fixing portion which are fixed to 50 skin facing surfaces and which are opposed to each other in the vertical direction Y; a fixed side portion (proximal portion) 56 extending in the vertical direction Y; and a lateral direction X from the fixed side portion 56 And a sleeve-like free side edge (distal edge) 57 located inside. A cuff elastic body 58 made of a string-like or strand-like elastic member and extending in the longitudinal direction Y is attached in the free side edge portion 57 so as to be contracted in an extended state. When the cuff elastic body 58 contracts in the wearing state, the free side edge 57 is separated from the body side liner 50 toward the wearer's body side, and a pair of leak-proof cuffs for preventing side leakage of body fluid is formed. (See the virtual line in FIG. 3). It is preferable that both end portions of the cuff elastic body 58 extend to the outside in the longitudinal direction Y of the indicator means 15.

  The liquid absorbing structure 17 and the chassis 14 are joined to each other via a joining region 61 formed from a known joining means 60 such as a hot melt adhesive applied to at least one of the facing surfaces. The joining region 61 includes a front joining region 62 located at the front end edge of the liquid absorbing structure 17 and a rear joining region 63 located at the rear end edge, and between the front and rear joining regions 62 and 63 in the longitudinal direction Y. The non-joining area 64 where the liquid absorbing structure 17 and the chassis 14 are not joined is formed between the side edges 17c and 17d. In the present embodiment, a part of the end flap of the liquid absorbing structure 17 is bonded to the chassis 14 via the front and rear bonding areas 62 and 63, and the non-bonding area is entirely covered by the area overlapping the liquid absorbing core in plan view. Although 64 is formed, it is not restricted to this, For example, the joining area | region 61 may be formed in a part of area | region which overlaps with a liquid absorbing core in thickness direction in planar view. The non-joining area 64 is preferably formed in the lowermost part of the crotch area 13 (that is, the part overlapping the horizontal axis Q in plan view).

<Indicator means>
The indicator means 15 has a visual effect that changes due to contact with moisture. The indicator means 15 is configured to be visible from the outside of the diaper 10 and is disposed in a region where the absorbent core and the chassis 14 overlap in plan view. The The indicator means 15 is preferably disposed in the non-bonding area 64 between the liquid absorbing structure 17 and the chassis 14, and is preferably located at least in the crotch area, and a part thereof overlaps the vertical axis P in plan view. In the present embodiment, the indicator means 15 is located on the surface of the chassis 14 that faces the leakproof sheet 52, and extends in a plurality of lines from the crotch region 13 toward the front and rear waist regions 11 and 12.

  2 and 4, a separation dimension L1 in the longitudinal direction Y between the front end edge 15a of the indicator means 15 and the inner end edge 62a of the front joint area 62 of the liquid absorbing structure 17, and the rear end of the indicator means 15 The spacing dimension L2 in the longitudinal direction Y between the edge 15b and the inner end edge 63a of the rear joint region 63 of the liquid absorbing structure 17 is preferably about 30 mm or more. Specifically, in the plan view of the diaper 10 shown in FIG. 2, the liquid absorbing structure 17 and the chassis 14 are not joined in the arrangement area of the indicator means 15 and in the range of about 30 mm around the arrangement area. (The non-bonding region 64 is formed).

  As the indicator means 15, for example, a hot melt composition containing a heat-meltable polymer, a pH indicator showing a color reaction, and plasticized oil can be used. As the polymer, those used for general hot melt adhesives such as polyethylene glycol can be used, and as the indicator, a pH indicator such as bromocresol green, ethyl red, bromophenol blue or resorazurin is used. Can do. As the plasticizing oil, paraffinic oil, naphthenic oil, fatty acid compound, aromatic carboxylic acid compound, etc. used in general hot melt adhesives can be used, and a mixture thereof should be used. You can also. Moreover, as the indicator means 15, the printing sheet containing a hydrophilic base material sheet and the display element printed on the base material sheet can also be used. As the printing ink or paint forming the display element, for example, a hydrophilic ink containing light-scattering inorganic particles such as silica and alumina can be used.

  In the diaper 10 described above, when the wearer urinates, the absorbent body 51 absorbs urine, but when the urine is relatively small, the outer surface of the absorbent body 51 is covered with an impermeable leak-proof sheet 52. Since the indicator means 15 is located on the non-skin facing surface side with respect to the leak-proof sheet 52, urine does not pass through the leak-proof sheet 52 and contact the indicator means 15, and no visual change occurs. .

  When the wearer's urination is relatively large or when the absorber 51 absorbs a large amount of urine by multiple urinations, the amount of water vapor inside the diaper 10 is increased by a large amount of water, and the water vapor is permeable to moisture. It passes through the leak-proof sheet 52 and reaches the indicator means 15. Then, the indicator means 15 reacts with the water | moisture content of water vapor | steam, a visual change arises, and it can visually recognize from the exterior of the diaper 10 that there was a large amount of urination by this change. Thus, by appropriately controlling the timing at which the indicator means 15 reacts, the wearer and the wear assistant can accurately determine the replacement time of the diaper 10. Specifically, when the maximum value of the capacity that can be absorbed by moisture in the absorber 51 is 100%, the indicator means 15 is about 30% or more, more preferably about 40% or more. It can be controlled to react.

<Measurement method of absorbable capacity>
The absorbable capacity of the absorber 51 was measured by the following method. First, the mass of the sample of the diaper 10 is measured, and then the sample is put in a 400 mesh nylon bag. In the sample, the chassis 14 and the leak-proof sheet 52 were removed from the diaper 10 as much as possible. After immersing the sample contained in the nylon bag in 1000 ml of physiological saline for 30 minutes, the sample is set so that the body side liner 50 side of the sample faces the outside of the centrifuge, and dehydrated at 150 G (850 rpm) for 2 minutes. Remove the dehydrated sample from the nylon bag and measure the weight of the sample. The absorbable capacity of the sample (absorbable capacity of the absorber 51) (unit: g) was calculated by the following mathematical formula (1).

[Equation 1]
“Absorbable capacity of sample (absorbable capacity of absorber 51) (g)” = “mass of sample after dehydration (g)” − “mass of sample before immersion in physiological saline (g)” (1)

  Referring to FIGS. 3 and 4, the liquid absorbing structure 17 contracts in the longitudinal direction Y due to the contraction of the cuff elastic body 58 in a state before the urination by the wearer occurs in the state of wearing the diaper 10, and in the non-joining region 64. The chassis 14 and the liquid absorption structure 17 are separated from each other. In FIG. 3, the separation dimension between the chassis 14 and the liquid absorption structure 17 is exaggerated in order to clearly show the separation state in the non-bonding region 64. In such a state, since the indicator means 15 and the leak-proof sheet 52 are not in contact with each other due to the separation of the chassis 14 and the liquid absorbing structure 17, the water vapor that has passed through the leak-proof sheet 52 directly reaches the indicator means 15. It is possible to prevent visual changes from occurring upon contact. For example, when the indicator means 15 is disposed in the joining region between the chassis 14 and the liquid absorbing structure 17 and the indicator means 15 and the leak-proof sheet 52 are in close contact with each other, a relatively small amount of urination is generated locally at the absorber 51. If there is a sufficient absorbable capacity in the absorber 51, the urine moisture absorbed locally passes through the leak-proof sheet 52 and then directly contacts the indicator means 15. Visual changes may occur. In this embodiment, since the indicator means 15 is arrange | positioned in the non-joining area | region 64 and is in the non-contact state with the leak-proof sheet | seat 52, this situation can be prevented. Since the cuff elastic body 58 extends to the outside in the longitudinal direction Y of the indicator means 15 in a plan view, the leak-proof sheet 52 and the chassis 14 can be easily separated in a region overlapping the indicator means 15 in the plan view. Can do.

  3 and 4, when the absorber 51 absorbs a large amount of urine, the liquid absorption structure 17 moves toward the chassis 14 due to the weight of the absorbed urine, and the chassis 14 and the liquid absorption structure Accordingly, the water vapor of the water vapor that has passed through the leak-proof sheet 52 easily reaches the indicator means 15, and the visual change of the indicator means 15 is likely to occur. In a state where the chassis 14 and the liquid absorbing structure 17 are in contact with each other, the moisture that has passed through the leak-proof sheet 52 can directly contact the indicator means 15 to cause a visual change. You can prevent delays. As described above, when the relatively large amount of urine is excreted in a state where the chassis 14 and the liquid absorption structure 17 are separated from each other, the separation dimension becomes small, so that the reaction timing of the indicator means 15 is accelerated. The fact can be quickly seen from the outside.

  In the diaper 10 of the present embodiment, the inner layer sheet 26 and the first and second auxiliary sheets 27 and 28 constituting the chassis 14 are formed of elastically expandable and contractible sheet members. 27 and 28, the chassis 14 can be elastically contracted in the longitudinal direction Y and / or the lateral direction X. Therefore, before the liquid absorption structure 17 moves to the chassis 14 side due to the weight of the absorbed urine, the chassis 14 is brought into a state that is reasonably close to the leak-proof sheet 52 due to the contraction force of the chassis 14, and the indicator means 15 is disposed. Even when the leak-proof sheet 52 and the chassis 14 are not joined to each other in the region, it is possible to prevent the reaction timing of the indicator means 15 from becoming too late.

<Modification 1>
FIG. 5 is a plan view similar to FIG. 2 of the diaper 10 in the first modification. In the plan view of FIG. 5, dots are attached to the junction region 61 between the liquid absorbing structure 17 and the chassis 14. In the diaper 10 of the first modification, the liquid absorbing structure 17 and the chassis 14 are joined to each other in a part of the crotch region 13. The crotch region 13 includes a front region 13A and a rear region 13B that are separated from each other in the longitudinal direction Y, and an intermediate region 13C that is located between the front region 13A and the rear region 13B, and each region 13A, 13B, The dimension in the longitudinal direction Y of 13C is substantially equal (that is, the dimension of 1/3 of the dimension in the longitudinal direction Y of the crotch area 13), and the liquid absorbing structure 17 and the chassis 14 are joined to each other in the intermediate area 13C. The front and rear regions 13A and 13B are not joined. Thus, the liquid absorption structure 17 and the chassis 14 may be joined to each other in a part of the arrangement region of the indicator means 15, for example, instead of the intermediate region 13C, the front region 13A and / or the rear region. They may be joined to each other in the region 13B. As shown in FIG. 5, by making the intermediate region 13C in which the urine is most likely to accumulate in the wearing state of the diaper 10 as the joining region 61, the indicator means 15 can be reacted at a relatively early timing, In 13A and 13B, the reaction of the indicator means 15 can be made comparatively slow by not joining. Thereby, the presence or absence of urination can be confirmed at an early stage, and the entire indicator means 15 can be prevented from reacting before the absorber 51 absorbs a large amount of urine. Although not shown, among the plurality of indicator means 15, the chassis 14 and the liquid absorbing structure 17 are joined in the arrangement area of some of the indicator means 15, and the other indicator means 15 is arranged. In the region, the joining region 61 may be formed so that the chassis 14 and the liquid absorbing structure 17 are not joined. For example, among the three indicator means spaced apart in the lateral direction X in FIG. 5, the joining area 61 is formed in the arrangement area of the central indicator means 15, and the non-joining area 64 in the arrangement area of the indicator means 15 located on both sides. May be formed. Even in such a diaper 10, the presence or absence of urination can be confirmed at an early stage, and the entire indicator means 15 can be prevented from reacting before the absorber 51 absorbs a large amount of urine.

Second Embodiment
FIG. 6 is a schematic cross-sectional view similar to FIG. 3 showing the disposable diaper 10 of the second embodiment. Since the basic configuration of the diaper 10 according to the present embodiment is the same as that according to the first embodiment, only differences will be described below.

  In the diaper 10 of this embodiment, the indicator means 15 is located on the outer surface of the chassis 14 (the outer surface of the barrier sheet 54). The indicator means 15 is disposed in a region overlapping the non-joining area 64 in plan view, and a separation dimension L1 between the front end edge 15a of the indicator means 15 and the inner end edge 62a of the front joining area 62 of the liquid absorbing structure 17. The separation dimension L2 between the rear end edge 15b of the indicator means 15 and the inner end edge 63a of the rear joint region 63 of the liquid absorbing structure 17 is preferably about 30 mm or more. In such a diaper 10, when the amount of urination is relatively small, the outer surface of the absorber 51 is covered with a liquid-impervious leak-proof sheet 52, and the indicator means 15 is a non-skin facing surface with respect to the leak-proof sheet 52. The indicator means 15 is not in contact with urine because it is located on the side, and no visual change occurs.

  Moreover, in a state before urination by the wearer occurs in the wearing state of the diaper 10, the chassis 14 and the liquid absorbing structure 17 are separated from each other in the non-joining region 64 by the contraction action of the cuff elastic body 58. In such a state, since the indicator means 15 and the leak-proof sheet 52 are in a non-contact state, it is possible to prevent the water vapor that has passed through the leak-proof sheet 52 from coming into direct contact with the indicator means 15 and causing visual changes. In particular, since the leak-proof sheet 52 and the chassis 14 are interposed between the indicator means 15 and the absorber 51, the timing at which the indicator means 15 reacts compared to the diaper 10 of the first embodiment. Can be late.

  When the wearer's urination is relatively large or when the absorber 51 absorbs a large amount of urine by multiple urinations, the amount of water vapor inside the diaper 10 is increased by a large amount of water, and the water vapor is permeable to moisture. The indicator means 15 is reached through the leak-proof sheet 52 and the chassis 14. Then, the indicator means 15 reacts to the water | moisture content of water vapor | steam, and a visual effect changes, and it can visually recognize from the exterior of the diaper 10 that there was a large amount of urination by this change.

  As indicated by phantom lines in FIG. 6, when the absorber 51 absorbs a large amount of urine, the liquid absorbing structure 17 moves to the chassis 14 side due to the weight of the absorbed urine, and the leak-proof sheet 52 and the chassis 14 are separated from each other. The size is reduced, and the moisture of the water vapor that has passed through the leak-proof sheet 52 and the chassis 14 easily reaches the indicator means 15. As a result, the reaction timing of the indicator means 15 is advanced, and it can be prevented that the determination of the replacement time of the diaper 10 is delayed.

<Third Embodiment>
FIG. 7 is a schematic cross-sectional view similar to FIG. 3 showing the disposable diaper 10 of the third embodiment. Since the basic configuration of the diaper 10 according to the present embodiment is the same as that according to the first embodiment, only differences will be described below.

  In the diaper 10 of the present embodiment, the indicator means 15 is located on the outer surface of the leak-proof sheet 52 (the outer surface of the barrier sheet 54), specifically, bonded to the non-skin facing surface side of the leak-proof sheet 52. Yes. The indicator means 15 is disposed in a region overlapping the non-joining area 64 in plan view, and a separation dimension L1 between the front end edge 15a of the indicator means 15 and the inner end edge 62a of the front joining area 62 of the liquid absorbing structure 17. The separation dimension L2 between the rear end edge 15b of the indicator means 15 and the inner end edge 63a of the rear joint region 63 of the liquid absorbing structure 17 is preferably about 30 mm or more. In such a diaper 10, when the amount of urination is relatively small, the outer surface of the absorber 51 is covered with a liquid-impervious leak-proof sheet 52, and the indicator means 15 is a non-skin facing surface with respect to the leak-proof sheet 52. Since the indicator means 15 is located on the side, it does not come into contact with urine and no visual change occurs.

  When the wearer's urination is relatively large or when the absorber 51 absorbs a large amount of urine by multiple urinations, the amount of water vapor inside the diaper 10 is increased by a large amount of water, and the water vapor is permeable to moisture. The indicator means 15 is reached through the leak-proof sheet 52. Then, the indicator means 15 reacts with the water | moisture content of water vapor | steam, a visual change arises, and it can visually recognize from the exterior of the diaper 10 that there was a large amount of urination by this change.

  In the diaper 10 in this embodiment, since the indicator means 15 and the leak-proof sheet 52 are in contact, the timing at which the indicator means 15 reacts can be advanced compared to the diaper 10 of the first embodiment. Further, in a state before urination by the wearer occurs in the wearing state of the diaper 10, the chassis 14 and the liquid absorbing structure 17 are separated from each other in the non-joint region 64 by the contraction action of the cuff elastic body 58, that is, the indicator means 15. Since the chassis 14 and the chassis 14 are separated from each other, the air permeability inside the diaper 10 can be improved and the reaction timing of the indicator means 15 can be delayed as compared with the case where they are joined. Further, since the cuff elastic body 58 extends to the outside in the vertical direction Y of the indicator means 15 in plan view, the contraction force in the vertical direction Y of the cuff elastic body 58 reaches the arrangement area of the indicator means 15 and the indicator means. The entire 15 can be separated from the chassis 14.

  As shown by the phantom line in FIG. 7, when the absorber 51 absorbs a large amount of urine, the liquid absorbing structure 17 moves toward the chassis 14 due to the weight of the absorbed urine, and the leakage prevention sheet 52 and the chassis 14 are separated from each other. The size can be reduced, and the visual change of the indicator means 15 can be easily seen from the outside of the diaper 10. Thereby, it can prevent that the replacement | exchange time of the diaper 10 is delayed.

  The diaper 10 in 2nd and 3rd embodiment may be the structure which forms the junction area 61 in a part of arrangement | positioning area | region of the indicator means 15 similarly to the diaper 10 of the modification 1. FIG. In each embodiment, the outer layer sheet 25 may be a hydrophilic or non-hydrophilic nonwoven fabric. When a non-woven fabric having hydrophilicity is used as the outer layer sheet 25, the timing at which the indicator means 15 reacts can be advanced as compared with a non-hydrophilic sheet.

<Reaction test of indicator means>
About the timing which the indicator means 15 reacts, while imitating a wearing state, in order to make the conditions for repeating a test constant, it tested on the following conditions. First, the diaper 10 to which the indicator means 15 is attached is placed on the test stand in a developed state. The diaper 10 has a skin facing surface as an upper surface and a non-skin facing surface as a lower surface (a surface facing the test table). Next, 100 ml of water having a water temperature of 40 degrees is put into a cylinder having a diameter of 60 mm, and absorbed from the skin facing surface side of the diaper 10 into the arrangement region of the absorber 51. The cylinder is a region where the absorber 51 and the indicator unit 15 are arranged (a region where the absorber 51 and the indicator unit 15 overlap in the thickness direction), and a central portion of the indicator unit 15 (the vertical direction Y and the side of the indicator unit 15). It arrange | positions so that the center of a cylinder may be located in the part which divides the dimension in the direction X into 2 equally). After absorbing water, the diaper 10 is turned over so that the skin facing surface is the lower surface and the non-skin facing surface is the upper surface, and the underwear is placed on the non-skin facing surface side, and between the skin facing surface and the mounting table. Put an electric warmer with a temperature of 40 degrees. About each diaper 10 used as a test body, the degree of color change of the indicator means 15 in 1-3 minutes, 5 minutes, 10 minutes, and 15 minutes was visually recognized and evaluated in four stages.

  Table 1 shows the test results of each specimen. The diaper 10 of “Example 1” is the diaper 10 of the second embodiment (the indicator means 15 is located on the outer surface of the chassis 14), and the outer layer sheet 25 is made of a non-hydrophilic nonwoven fabric. The diaper 10 of “Example 2” is the diaper 10 of the third embodiment (the indicator means 15 is located on the outer surface of the leak-proof sheet 52), and the outer layer sheet 25 is made of a non-hydrophilic nonwoven fabric. The diaper 10 of “Example 3” is the diaper 10 of the third embodiment, and the outer layer sheet 25 is made of a hydrophilic nonwoven fabric. In the “Comparative Example 1” diaper, the indicator means is located on the inner surface of the leak-proof sheet. The response of the indicator means 15 is evaluated in four stages. When “no discoloration reaction”, “x”, “when there is a discoloration reaction but difficult to see”, “△”, “with a discoloration reaction, When there is still room for discoloration, “◯” was indicated, and when “color change reaction was completed (no further discoloration)”, “と し た” was indicated.

  As shown in Table 1, in Comparative Example 1, which is a conventional diaper, the discoloration reaction of the indicator means was completed after 1 minute despite the amount of water that was not necessary to change the diaper. In the diapers 10 of Examples 1 to 3, a color change reaction was observed after 5 minutes, but the color change reaction was not completed even after 15 minutes. Comparing Example 2 and Example 3, when the arrangement position of the indicator means 15 is the same, the reaction timing of the diaper 10 in which the outer layer sheet 25 is made of a hydrophilic nonwoven fabric is less than that of the non-hydrophilic one. It was early.

  In this specification, "the indicator means 15 is located on the non-skin facing surface side with respect to the leak-proof sheet 52" means that the indicator means 15 is the outer surface of the leak-proof sheet 52 (the non-skin facing surface of the leak-proof sheet 52). The indicator means 15 is arranged on the outer side (the non-skin facing surface side of the diaper 10) than the outer surface of the leak-proof sheet 52. In each embodiment, the indicator means 15 can be joined to each sheet 25, 26, 52 using its own adhesiveness or a known joining means.

  For each constituent member constituting the diaper 10 of the present invention, various known materials that are usually used in this type of article can be used without limitation in addition to the materials described in the specification. In the specification and claims, the terms “first” and “second” are used only to distinguish similar elements, positions, and the like.

  The disclosure relating to the present invention described above can be organized into at least the following matters.

  It has a vertical direction and a horizontal direction orthogonal to each other, a skin facing surface and a non-skin facing surface located on the opposite side, a front waist region, a rear waist region, and a crotch region positioned between the front and rear waist regions. A liquid-absorbent core extending from the crotch region to the front-rear waist region, a leak-proof sheet that covers the entire surface of the liquid-absorbent core on the non-skin facing surface side, and indicator means that can identify the presence or absence of urination from the outside The leakproof sheet is moisture permeable and liquid impermeable, and the indicator means is located on the non-skin facing surface side with respect to the leakproof sheet.

The present invention disclosed in the above paragraph 0054 can include at least the following embodiments.
(1) It includes a liquid-impermeable chassis that forms the outer surfaces of the front and rear waist regions and the crotch region, and the indicator means is located on the outer surface that forms the non-skin facing surface of the chassis.
(2) It includes a liquid-impervious chassis that forms the outer surfaces of the front and rear waist regions and the crotch region, and the indicator means is located on a surface of the chassis that faces the leakproof sheet.
(3) It includes a liquid-impervious chassis that forms the outer surfaces of the front and rear waist regions and the crotch region, and the indicator means is joined to the non-skin facing surface side of the leak-proof sheet.
(4) At least in the crotch region, the chassis and the leak-proof sheet are not joined to each other in a portion overlapping the indicator means in the thickness direction in plan view.
(5) At least in the crotch region, the chassis can elastically expand and contract in the vertical direction or the horizontal direction.
(6) A liquid-absorbing structure including the liquid-absorbent core and the leak-proof sheet, wherein the liquid-absorbing structure includes a front end portion and a rear end portion that are separated from each other in the longitudinal direction, and the front and rear end portions. An intermediate portion located between the front and rear end portions and joined to the chassis at the front and rear end portions, and the intermediate portion is not joined to the chassis in at least a part of the crotch region.
(7) The said liquid absorption structure contains the liquid-permeable body side liner which forms the said skin opposing surface.

10 Diapers (disposable wearing articles)
DESCRIPTION OF SYMBOLS 11 Front waist area 12 Rear waist area 13 Crotch area 14 Chassis 15 Indicator means 17 Liquid absorption structure 50 Body side liner 51 Absorber 52 Leak-proof sheet 58 Cuff elastic body 61 Joining area X Horizontal direction Y Vertical direction

Claims (8)

It has a vertical direction and a horizontal direction orthogonal to each other, a skin facing surface and a non-skin facing surface located on the opposite side, a front waist region, a rear waist region, and a crotch region positioned between the front and rear waist regions. A liquid-absorbent core extending from the crotch region to the front-rear waist region, a leak-proof sheet that covers the entire surface of the liquid-absorbent core on the non-skin facing surface side, and indicator means that can identify the presence or absence of urination from the outside In disposable wearing articles including
The leak-proof sheet is moisture permeable and liquid impermeable,
The disposable wearing article, wherein the indicator means is located on the non-skin facing surface side with respect to the leakproof sheet. Including a liquid-impervious chassis that forms an outer surface of the front and rear waist regions and the crotch region;
The disposable wearing article according to claim 1, wherein the indicator means is located on an outer surface forming the non-skin facing surface of the chassis. Including a liquid-impervious chassis that forms an outer surface of the front and rear waist regions and the crotch region;
The disposable wearing article according to claim 1, wherein the indicator means is located on a surface of the chassis facing the leakproof sheet. Including a liquid-impervious chassis that forms an outer surface of the front and rear waist regions and the crotch region;
The disposable wearing article according to claim 1, wherein the indicator means is joined to the non-skin facing surface side of the leak-proof sheet.   The disposable wearing article according to any one of claims 2 to 4, wherein at least in the crotch region, the chassis and the leak-proof sheet are not joined to each other in a portion overlapping with the indicator means in a plan view. .   The disposable wearing article according to claim 5, wherein the chassis is elastically stretchable in the longitudinal direction or the lateral direction at least in the crotch region. A liquid-absorbing structure including the liquid-absorbent core and the leak-proof sheet;
The liquid absorption structure has a front end portion and a rear end portion that are separated from each other in the vertical direction, and an intermediate portion located between the front and rear end portions, and is joined to the chassis at the front and rear end portions. The disposable wearing article according to any one of claims 2 to 6, wherein the intermediate portion is not joined to the chassis in at least a part of the crotch region.   The disposable wearing article according to claim 7, wherein the liquid absorption structure includes a liquid-permeable body side liner that forms the skin facing surface.

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