JP2023006811A - absorbent article - Google Patents

Abstract

To provide an absorbent article, capable of properly exhibiting a function of a function agent in a micro capsule, when using an absorbent article by a user.SOLUTION: An absorbent article (1) comprises: an absorbent main body (10); and a waist member (20) which is formed on a non-skin side of the absorbent main body (10), and forms a waist opening and parts of leg openings. Therein, the waist member (20) has wrinkles in a natural state. An outermost layer of the waist member (20) is provided with broken micro capsules (82) which are broken at least partially, and non-broken micro capsules (81) which are not broken, as micro capsules (80) each including therein, a function agent, and recesses (22) which are formed on the outermost layer by the wrinkles, is provided with at least one non-broken micro capsule (81).SELECTED DRAWING: Figure 5

Description

The present invention relates to absorbent articles.

2. Description of the Related Art Conventionally, there is known a technique of arranging microcapsules containing a functional agent in an absorbent article such as an underpants-type disposable diaper having a waist member and an absorbent body (for example, Patent Document 1).

JP-A-2008-6277

In the absorbent article according to the conventional example, during the transportation of the absorbent article (that is, from the time the absorbent article is manufactured until the absorbent article reaches the hand of the consumer and the user uses the absorbent article) Due to the fact that the microcapsules fall off or break from the absorbent article during this period, it is difficult for the functional agent in the microcapsules to properly perform its function when the absorbent article is used by the user. I was afraid I wouldn't be able to.

The present invention has been made in view of the conventional problems as described above, and an object of the present invention is to appropriately exhibit the function of the functional agent in the microcapsules when the user uses the absorbent article. That's what it is.

The main invention for achieving the above object has an absorbent main body, and a waist member disposed on the non-skin side of the absorbent main body and forming a part of the waist opening and the leg opening,
An absorbent article in which the waist member has wrinkles in a natural state,
In the outermost layer of the waist member, as microcapsules encapsulating the functional agent, there are at least partially damaged damaged microcapsules and undamaged undamaged microcapsules,
The absorbent article is characterized in that at least one of the unbroken microcapsules is present in a recess formed in the outermost layer by the wrinkles.

Other features of the present invention will become apparent from the description of the specification and accompanying drawings.

ADVANTAGE OF THE INVENTION According to this invention, when a user uses an absorbent article, it becomes possible to exhibit the function of the functional agent in a microcapsule appropriately.

1 is a schematic perspective view of a diaper 1; FIG. 1 is a plan view of diaper 1 in an unfolded and stretched state; FIG. FIG. 3 is a schematic cross-sectional view taken along line AA of FIG. 2; FIG. 7 is an explanatory diagram of a microcapsule arrangement area 70; FIG. 3 is an image diagram showing a state in which microcapsules 80 are present in the outermost layer (non-skin side sheet 32) of the waist member 20 (front waist portion 30). Fig. 10 is a plan view of the diaper 1 according to the second embodiment in an unfolded and stretched state; FIG. 7 is a schematic cross-sectional view taken along line AA of FIG. 6; FIG. 11 is an explanatory diagram of a microcapsule placement region 70 in the second embodiment; FIG. 11 is an explanatory diagram of a microcapsule placement region 70 in the third embodiment;

At least the following matters will become apparent from the descriptions of this specification and the accompanying drawings.

an absorbent body; and a waist member disposed on the non-skin side of the absorbent body and forming part of the waist opening and the leg openings,
An absorbent article in which the waist member has wrinkles in a natural state,
In the outermost layer of the waist member, as microcapsules encapsulating the functional agent, there are at least partially damaged damaged microcapsules and undamaged undamaged microcapsules,
An absorbent article, wherein at least one of the unbroken microcapsules is present in a recess formed in the outermost layer by the wrinkles.

According to such an absorbent article, when a user uses the absorbent article, it is possible to appropriately exhibit the function of the functional agent in the microcapsules.

In such an absorbent article, at least one unbroken microcapsule is present in a convex portion formed on the outermost layer by the wrinkles,
It is desirable that the basis weight of the unbroken microcapsules in the concave portion is higher than the basis weight of the unbroken microcapsules in the convex portion.

According to such an absorbent article, the progression of exposure of the unbroken microcapsules during use (wearing) of the absorbent article is moderately suppressed, and the function of the functional agent in the microcapsules is gradually exerted. Become. Therefore, it becomes possible to maintain the function of the functional agent for a long time.

The absorbent article has a vertical direction and a horizontal direction that intersect with each other,
The waist member has an upper region and a lower region when the waist member is divided into two in the vertical direction in a stretched state, and the upper region and the lower region are elastic regions that can be stretched in the horizontal direction. and
the unbroken microcapsules are disposed at least in the upper region;
Preferably, the contractile force of the upper region is greater than the contractile force of the lower region.

According to such an absorbent article, it is possible for the user (wearer) to surely feel the function of the functional agent at the start timing of using (wearing) the absorbent article.

The absorbent article has a vertical direction and a horizontal direction that intersect with each other,
The waist member has an upper region and a lower region when the waist member is divided into two in the vertical direction in a stretched state, and the upper region and the lower region are elastic regions that can be stretched in the horizontal direction. and
the unbroken microcapsules are disposed at least in the lower region;
Preferably, the contractile force of the upper region is greater than the contractile force of the lower region.

According to such an absorbent article, release of the functional agent from the microcapsules in this region is suppressed at the timing of wearing the absorbent article, and the function of the functional agent can be maintained for a long time. Furthermore, even when wearing the absorbent article, which is relatively less likely to cause physical irritation than when wearing the absorbent article, the exposure of the unbroken microcapsules in the recessed portions is facilitated with a small irritation, and the functional agent is released. It is possible to appropriately release the gas to the outside.

This absorbent article has a film material on the skin side of the waist member,
When viewed in the thickness direction in the unfolded state of the absorbent article, it is desirable that the microcapsule arrangement region where the unbroken microcapsules are arranged and the film material at least partially overlap.

According to such an absorbent article, even if the microcapsules located in the waist member are broken and the functional agent is released from the microcapsules, the functional agent is blocked by the film material and is unlikely to move toward the skin. Therefore, the functional agent is more likely to be released to the non-skin side (outside the absorbent article) than to the skin side, and the functional agent that is released to the non-skin side works effectively (for example, , repellent), the function of the functional agent can be appropriately exhibited.

This absorbent article has a film material on the skin side of the waist member,
When the absorbent article is unfolded and viewed in the thickness direction, it is desirable that the film material and the microcapsule arrangement area where the unbroken microcapsules are arranged do not overlap.

According to such an absorbent article, even if the microcapsules located in the waist member are broken and the functional agent is released from the microcapsules, the functional agent will not be blocked by the film material. Therefore, the functional agent is easily released to the skin side, and in the case of a functional agent (for example, a cooling sensation agent) that works effectively by being released to the skin side, the function of the functional agent can be appropriately controlled. It is possible to demonstrate.

The absorbent article has a vertical direction and a horizontal direction that intersect with each other,
The waist member has a front waist portion and a rear waist portion, and includes side joints at both ends in the left-right direction for joining the front waist portion and the rear waist portion,
When the absorbent article is unfolded and viewed in the thickness direction, it is desirable that the microcapsule arrangement region where the unbroken microcapsules are arranged and the side joint part at least partially overlap.

According to such an absorbent article, since the microcapsule arrangement area and the side joint portion overlap each other, the peel strength of the overlapped portion is weakened (the side joint portion is easily broken), and the absorbent article can be easily taken off. It becomes possible.

In this absorbent article, the waist member includes a non-joint portion where the front waist portion and the back waist portion are not joined outside the side joint portions in the left-right direction,
When the absorbent article is unfolded and viewed in the thickness direction, it is desirable that at least a portion of the microcapsule arrangement region where the unbroken microcapsules are arranged and the non-bonded portion overlap.

According to such an absorbent article, the microcapsules located in the non-bonded portion (waist member) are more likely to be physically stimulated by the underwear. can be properly exhibited.

It is desirable that such an absorbent article has a covering member that covers the microcapsule arrangement area where the unbroken microcapsules are arranged.

According to such an absorbent article, when a user uses the absorbent article, it is possible to more appropriately exhibit the function of the functional agent in the microcapsules.

The absorbent article has a vertical direction and a horizontal direction that intersect with each other,
The microcapsule arrangement regions in which the unbroken microcapsules are arranged are streak-like lateral regions along the lateral direction, which are provided side by side at intervals in the vertical direction, or It is desirable that a plurality of the vertical regions are arranged side by side with a space therebetween and extend along the vertical direction.

According to such an absorbent article, even if moisture such as sweat (bodily fluid) in one area comes into contact with the microcapsules, the moisture is absorbed by the microcapsules in the other area through cooperation of the plurality of microcapsules in the area. You can avoid telling Therefore, the function of the functional agent is not exerted at once in the entire region, and the function of the functional agent can be maintained for a long time.

In such an absorbent article, it is desirable that the microcapsule arrangement area is the left-right direction area, and the left-right direction area is a stretchable area capable of stretching in the left-right direction.

According to such an absorbent article, it is possible to ensure that the microcapsules are present in the concave portions.

The absorbent article has a vertical direction and a horizontal direction that intersect with each other,
The microcapsule placement region in which the unbroken microcapsules are arranged is a streaky left-right direction region along the left-right direction, and the left-right direction region is a stretchable region that can be stretched in the left-right direction. desirable.

According to such an absorbent article, it is possible to ensure that the microcapsules are present in the concave portions.

In this absorbent article, the waist member has a front waist portion and a back waist portion,
Preferably, the basis weight of the unbroken microcapsules in the stretched front waistline portion is higher than the basis weight of the unbroken microcapsules in the stretched back waistline portion.

According to such an absorbent article, more undamaged microcapsules are provided on the side where the functional agent is likely to be efficiently released from the viewpoint of the body shape of the wearer of the absorbent article (the front waist portion side). Therefore, it becomes possible to exhibit the function of the functional agent more appropriately.

In this absorbent article, the waist member has a front waist portion and a back waist portion,
It is preferable that the basis weight of the unbroken microcapsules in the stretched back waistline portion is higher than the basis weight of the unbroken microcapsules in the stretched front waistline portion.

According to such an absorbent article, it is possible to efficiently release the functional agent to the outside when the person is in a sitting position or lying down, and it is possible to appropriately exhibit the function of the functional agent.

In this absorbent article, the waist member has a front waist portion and a back waist portion,
at least one unbroken microcapsule is present in the recesses of the front waistline portion and the rear waistline portion;
The total number of unbroken microcapsules in the recesses of the front waistline portion and the total number of unbroken microcapsules in the recesses of the rear waistline portion are preferably different from each other.

According to such an absorbent article, the sustained release property of the functional agent (the extent to which the functional agent is gradually released from the microcapsules) is appropriately adjusted.

===Embodiment===
As an absorbent article according to the present invention, an underpants-type disposable diaper (hereinafter also referred to as "diaper 1") will be described as an example. However, the absorbent article according to the present invention also includes shorts-type napkins and other pants (shorts)-type absorbent articles.

=== Configuration of Diaper 1 ===
FIG. 1 is a schematic perspective view of a diaper 1. FIG. FIG. 2 is a plan view of the diaper 1 in an unfolded and stretched state. 3 is a schematic cross-sectional view taken along line AA of FIG. 2. FIG. The "unfolded state" of the diaper 1 is a state in which the pair of side joints 50 provided on both sides of the diaper 1 are separated and the diaper 1 is opened and unfolded in a plane. In addition, the "stretched state" of the diaper 1 means a state in which the entire diaper 1 (whole product) is stretched without wrinkles. It refers to a state in which the waistline member 20, etc.) is stretched until its dimensions match or are close to the dimensions of the member itself.

In the underpants-type state shown in FIG. 1, the diaper 1 has a vertical direction, a horizontal direction, and a front-back direction that intersect with each other, and has a waist opening BH and a pair of leg openings LH, LH. The upper side in the vertical direction corresponds to the waist opening BH side, and the lower side corresponds to the crotch side. In addition, the front side in the front-rear direction corresponds to the wearer's ventral side, and the rear side corresponds to the wearer's dorsal side. In the unfolded state of FIG. 2, the diaper 1 has a vertical direction and a horizontal direction that intersect each other. The vertical direction is the vertical direction in FIG. 1 and corresponds to the longitudinal direction of the absorbent body 10 . The horizontal direction is the direction along the horizontal direction in FIG. Also, as shown in FIG. 3, the direction in which the materials forming the diaper 1 are laminated is defined as the thickness direction. Let the side which touches a wearer's skin in a thickness direction be a skin side, and let the other side be a non-skin side.

The diaper 1 has a liquid-absorbing absorbent main body 10 and a waist member 20 which is disposed on the non-skin side of the absorbent main body 10 and which forms part of the waist opening BH and the leg openings LH, LH. ing. The waist member 20 has a front waist portion 30 corresponding to the front body of the diaper 1 and a rear waist portion 40 corresponding to the back body of the diaper 1 . That is, the diaper 1 of this embodiment has an absorbent main body 10 as a first part that is applied to the wearer's crotch area and absorbs excrement such as urine, and as a second part, an absorbent main body 10 that is attached to the wearer's abdomen. It is a so-called three-piece pants-type diaper having a front waistline part 30 that covers the upper part of the body and a rear waistline part 40 that covers the back of the wearer as a third part.

In the unfolded state of FIG. 2, the front waistline portion 30 and the rear waistline portion 40 are arranged in parallel with each other with a space in the longitudinal direction, and the absorbent main body 10 is stretched between them. The ends 10ea and 10eb in the longitudinal direction (corresponding to the vertical direction in FIG. 2) of the absorbent main body 10 are joined and fixed to the skin sides of the nearest waistlines 30 and 40 via the main body joint portions 60, respectively. there is Specifically, in the front overlap region OL30 where the absorbent main body 10 and the front waistline portion 30 overlap in the thickness direction, the front body joint portion 61 (body joint portion) formed by an adhesive such as a hot-melt adhesive is formed. The non-skin side surface of the absorbent main body 10 and the skin side surface of the front waistline portion 30 are joined by the portion 60) (see FIGS. 2 and 3). Similarly, in the back overlap region OL40 where the absorbent body 10 and the back waistline portion 40 overlap in the thickness direction, the back body joining portion 62 (body The non-skin side surface of the absorbent main body 10 and the skin side surface of the back waist portion 40 are joined by the joint portion 60).

Then, from this unfolded state, the absorbent main body 10 is folded in two with the vertical central position CL as the folding position (folding line). The front waist portion 30 and the rear waist portion 40 facing each other in this folded state are joined and connected to each other at the side portions 30sw and the side portions 40sw on both sides in the left-right direction, and the pair of side joint portions 50, 50 It is formed. That is, the waist member 20 has side joints 50, 50 that join the front waist part 30 and the rear waist part 40 at both ends in the left-right direction. A rear waist portion 40 is formed in an annular shape. The side joints 50 are formed by known joining means such as welding and adhesion. As a result, the pants-type diaper 1 having a waist opening BH and a pair of leg openings LH, LH as shown in FIG. 1 is obtained.

(Absorptive main body 10)
The absorbent main body 10 includes an absorbent core 11 which is provided closer to the skin than the waist member 20 and absorbs excrement, a top sheet 12 which is arranged closer to the skin than the absorbent core 11 in the thickness direction, and an absorbent body. and a back sheet 13 arranged on the non-skin side of the elastic core 11 (see FIG. 3). However, the absorbent main body 10 may be provided with sheet members other than this. For example, a second sheet (not shown) may be provided between the top sheet 12 and the absorbent core 11 in the thickness direction.

The absorbent core 11 is a member that absorbs and retains excretions such as urine, and is made of liquid-absorbent fibers such as pulp fibers mixed with superabsorbent polymer (SAP). The absorbent core 11 may be covered with a liquid-permeable sheet member (core wrap sheet 11b) such as tissue paper or non-woven fabric. The absorbent core 11 of this embodiment has a constricted portion 11c with a narrow width in the left-right direction between the front end and the rear end in the longitudinal direction. It has a substantially hourglass shape. The constricted portion 11c is a portion that is sandwiched between the legs of the wearer when the diaper 1 is worn. becomes easier to fit the crotch of the wearer.

The top sheet 12 is a liquid-permeable sheet, and for example, a hydrophilic air-through nonwoven fabric, a spunbond nonwoven fabric, or the like is used. In addition, the top sheet 12 may be configured so that both sides in the left-right direction are folded back from the skin side to the non-skin side in the thickness direction so as to wrap the absorbent core 11 (not shown in FIG. 3).

The back sheet 13 has a two-layer structure of a liquid-impermeable sheet 13a (corresponding to a film material) and a hydrophobic exterior sheet 13b arranged on the non-skin side thereof. As the liquid-impermeable sheet 13a, for example, a resin film or the like is used, and as the exterior sheet 13b, for example, a flexible non-woven fabric is used.

Also, a pair of leak-proof walls (not shown in FIG. 3) may be provided along the vertical direction (longitudinal direction of the absorbent body 10) on both sides of the absorbent body 10 in the left-right direction. For example, in the left-right direction (horizontal direction), part of the exterior sheet 13b extends outward from both ends of the absorbent core 11 and is folded toward the skin to form a pair of leak-proof walls. can. By providing such a leak-proof wall portion, it becomes easier to suppress side leakage of excrement absorbed by the absorbent main body 10 when the diaper 1 is worn.

(Front waist part 30)
As shown in FIG. 3, the front waist portion 30 includes a skin-side sheet 31 arranged on the skin side in the thickness direction and a non-skin-side sheet laminated so as to be adjacent to the non-skin side of the skin-side sheet 31. and a waist elastic member 35 provided between the skin-side sheet 31 and the non-skin-side sheet 32 in the thickness direction.

The skin-side sheet 31 and the non-skin-side sheet 32 are rectangular sheet members as shown in FIG. 2, and are formed of, for example, SMS (spunbond-meltblown-spunbond) nonwoven fabric.

The waist elastic members 35 are formed of, for example, thread rubber, and are arranged in a plurality in the vertical direction between the skin-side sheet 31 and the non-skin-side sheet 32, and are attached while being stretched in the left-right direction. ing. Due to the stretchability exhibited by the waist elastic member 35, the front waist portion 30 fits around the abdomen of the wearer. That is, the front waist portion 30 is an elastic region that can be expanded and contracted in the left-right direction.

The waist elastic member 35 can be attached using an adhesive such as a hot-melt adhesive. For example, the waist elastic member 35 can be attached by applying a hot-melt adhesive to the waist elastic member 35, extending it at a predetermined elongation ratio, and sandwiching it between the skin-side sheet 31 and the non-skin-side sheet 32. That is, the skin-side sheet 31 and the non-skin-side sheet 32 are joined with an adhesive via the waist elastic member 35 . Instead of applying adhesive to the waist elastic member 35 side, the waist elastic member 35 may be attached by applying adhesive to the skin-side sheet 31 and non-skin-side sheet 32 sides.

In addition, in the front waist part 30 , there is an area where the waist elastic member 35 is intentionally cut in the area where the absorbent main body 10 is located. Therefore, this region is a non-stretchable region of the waist elastic member 35 (referred to as a non-stretchable region NS). By providing such a region, it is possible to prevent the absorbent main body 10 (absorbent core 11) from shrinking due to the waist elastic member 35 and the formation of a gap between the diaper 1 and the wearer.

(Rear waist part 40)
The rear waist portion 40 has substantially the same configuration as the front waist portion 30 . That is, the back waist portion 40 includes a skin-side sheet 41 arranged on the skin side in the thickness direction, a non-skin-side sheet 42 laminated so as to be adjacent to the non-skin side of the skin-side sheet 41, and a skin-side sheet. and a plurality of waist elastic members 45 provided between the sheet 41 and the non-skin side sheet 42 in the thickness direction. Since the configuration of each member is substantially the same as that of the front waist portion 30, description thereof will be omitted.

On the other hand, the appearance shape of the rear waist portion 40 is different from that of the front waist portion 30 . Specifically, as shown in FIG. 2, the rear waist portion 40 has a buttock cover 40b having a substantially trapezoidal shape below the side joint portion 50 (side portion 40sw) in the vertical direction. The buttocks cover 40b is a portion whose width in the horizontal direction is narrowed from the upper side to the lower side in the vertical direction and whose outer edge is curved. The provision of the buttock cover 40b allows the rear waist portion 40 to widely cover the wearer's buttocks when the diaper 1 is worn.

The buttock cover 40b is provided with a rear leg elastic member 47 such as rubber thread as shown in FIG. The rear leg elastic members 47 are attached between the skin-side sheet 41 and the non-skin-side sheet 42 in an extended state along the peripheral edge of the buttock cover 40b, and the rear leg elastic members 47 are developed. Due to the stretchability, the buttocks cover 40b of the rear waist part 40 can easily fit the wearer's buttocks when the diaper 1 is worn, and is less likely to roll up from the buttocks.

===First embodiment===
FIG. 4 is an explanatory diagram of the microcapsule arrangement region 70, showing the front waistline portion 30 in a stretched state. FIG. 5 is an image diagram showing how microcapsules 80 are present in the outermost layer (non-skin side sheet 32) of the waist member 20 (front waist portion 30).

The diaper 1 is provided with microcapsules 80 (membrane material) containing a functional agent (core material). The microcapsules 80 are capsules having a diameter of 1 to 1000 μm and a space containing a functional agent. Materials for the microcapsules 80 include urethane resin, gelatin, gelatin/gum arabic, melamine resin, urea, formalin resin, sugars, and the like. In this embodiment, microcapsules 80 made of urethane resin are employed. However, the film material of the microcapsules 80 collapses (damages) due to physical stimulation (for example, pressure, impact, heat, vibration, light, etc.) or chemical stimulation (for example, contact with liquid such as body fluid). , is not particularly limited as long as the encapsulated functional agent is released.

The appearance of the microcapsules 80 is not particularly limited as long as the functional agent (core material) is encapsulated and the release of the functional agent (core material) can be controlled. Appearance shapes such as a fixed shape can be mentioned. In addition, the microcapsules 80 may be a mononuclear type having one space for holding a functional agent (core material), a multinuclear type having multiple spaces for holding a functional agent (core material), or a fine particle core inside a particle. It may be a matrix type structure in which a substance is dispersed or a structure in which a liquid core substance is impregnated. Examples of the shape of the space include a spherical shape, an irregular shape, and the like.
The microcapsules are commercially available, for example, INCAP (trademark) available from Symrise.

As a method of providing the microcapsules 80 in the diaper 1, there is a method of coating the diaper 1 with a liquid in which the microcapsules 80 are dispersed. The liquid (dispersion medium) in which the microcapsules 80 are dispersed preferably does not dissolve or swell the microcapsules 80 and retains the function of the functional agent. For such solvents, reference can be made to Japanese Patent Publication No. 2016-13154. Examples of the coating method include various known methods such as a spraying method, a roller coating method, and a brush coating method.

Further, functional agents include, for example, cooling sensation agents and insect repellents (hereinafter simply referred to as repellents). As cooling agents, those commonly known in the art as cooling agents can be used, but they are volatile and act on receptor-activated channels (TRPM8) in nerves in the skin. It is preferable to Examples thereof include menthol (eg, l-menthol) and its derivatives (eg, menthyl lactate), methyl salicylate, camphor, cucumber extract, essential oils derived from plants (eg, mint, eucalyptus, nutmeg), and the like.

A repellent is a repellent (insect repellent) against pests such as mosquitoes, silkworms, midges, and flies, and is a synthetic compound or natural plant extract containing an insect repellent component. For example, citronellal, 1,8-cineole, linalyl acetate, deet (N,N-diethyl-3-methylbenzamide), sesquiterpenes, ethyl butyl acetylaminopropionate, picaridin, pyrethroids, cinnamon, rosemary, lavender, peppermint. , eucalyptus, citronella, lemon eucalyptus, turmeric, etc. can be used. The repellent can be selected according to target pests and wearers.

In addition, the functional agent is not limited to a cooling agent or a repellent. For example, it may be perfume.

As shown in FIG. 4, in the diaper 1 according to the present embodiment, microcapsules 80 are provided (existing) in the waist member 20 (in the present embodiment, the front waist portion 30). ). That is, the microcapsule arrangement area 70 is arranged in the front waist portion 30 .

As shown in FIG. 3, in the present embodiment, microcapsules 80 are provided (exist) in the outermost layer of waist member 20 (front waist portion 30). The outermost layer of the front waist portion 30 includes the skin-side sheet 31 and the non-skin-side sheet 32. In the present embodiment, the non-skin-side sheet 32 is provided with microcapsules 80 (however, this It is not limited, and may be the skin side sheet 31).

Furthermore, in the present embodiment, as shown in FIG. 5, microcapsules 80 are provided in the recesses 22 and the protrusions 23 of the outermost layer (non-skin side sheet 32) of the waist member 20 (front waist portion 30). exists (exists). As described above, the waist elastic member 35 is provided in the waist member 20 (the front waist portion 30), and the elasticity of the waist elastic member 35 causes the waist member 20 (the front waist portion 30) to expand and contract in the left-right direction. It is a possible stretchable area. Therefore, in the waist member 20 (front waist portion 30), a plurality of wrinkles are generated by the waist elastic member 35 in a natural state, and the concave portions 22 and the convex portions 23 described above in the front waist portion 30 (non-skin side sheet 32) are formed by the wrinkles. That is, the concave portion 22 (convex portion 23) in the present embodiment means unevenness created by wrinkles caused by the waist elastic member 35 in a natural state. The boundary between the convex portion 23 and the concave portion 22 is an inflection point H, and in FIG.

Here, the "natural state" is the state when the diaper 1 is left for a predetermined period of time. For example, after the diaper 1 in the product state is taken out of the package, the front waistline portion 30 and the rear waistline portion 40 are pulled outward in the left-right direction to put the front waistline portion 30 and the rear waistline portion 40 into a "stretched state." After continuing this stretched state for 15 seconds, the diaper 1 is released from the tension and placed on a flat surface such as a desk. Then, the state after 5 minutes of being placed flat on a flat surface is defined as a natural state.

In order to appropriately provide the microcapsules 80 not only in the convex portions 23 but also in the concave portions 22, for example, in the manufacturing process of the diaper 1, the microcapsules 80 are applied to the front waist portion 30 after the step of coating the front waist portion 30. It is desirable to carry out a process for imparting elasticity. That is, it is preferable to perform the coating step while the diaper 1 is in a stretched state without being shrunk. The microcapsules 80 are appropriately present in the concave portions 22 and convex portions 23 of the product (diaper 1) thus manufactured.

By the way, during transportation of the diaper 1 (that is, from the time when the diaper 1 is manufactured until the time when the diaper 1 is delivered to the consumer and when the user uses the diaper 1), the microcapsules 80 are transferred to the diaper 1 (non It may come off or be damaged from the skin side sheet 32). When the microcapsules 80 fall off the diaper 1, the microcapsules 80 do not remain on the diaper 1 (non-skin side sheet 32), but when the microcapsules 80 are broken, the microcapsules 80 function as functional agents. It remains in the diaper 1 (the non-skin side sheet 32) as the broken microcapsules 82 (at least partially broken microcapsules). Therefore, when the diaper 1 reaches the hand of the consumer and the user uses the diaper 1, as shown in FIG. It will exist in the diaper 1 (non-skin side sheet 32). Here, since the diaper 1 is conveyed in its natural state (shrinking state) without being stretched, the microcapsules 80 in the concave portions 22 are difficult to be exposed during conveyance. Existing microcapsules 80 tend to remain as unbroken microcapsules 81 .

Thus, in the present embodiment, the outermost layer (non-skin side sheet 32) of waist member 20 (front waist portion 30) is provided with microcapsules 80 encapsulating a functional agent, which are at least partially damaged microcapsules. There are capsules 82 and undamaged microcapsules 81, and at least one undamaged microcapsule 81 is present in the recess 22 formed in the outermost layer (non-skin side sheet 32) by wrinkles (Fig. 5). In the diaper 1 according to the present embodiment, since the undamaged microcapsules 81 are present in the concave portions 22 of the non-skin-side sheet 32, the function of the microcapsules 80 is reduced when the user uses the diaper 1. It is possible to appropriately exhibit the function of the agent.

In the diaper 1 according to the conventional example, the microcapsules When the user uses the diaper 1, there is a risk that the function of the functional agent in the microcapsules 80 cannot be properly exerted due to the microcapsules 80 falling off or being damaged from the diaper 1. . That is, when the diaper 1 reaches the hand of the consumer, many microcapsules 80 have already disappeared from the diaper 1, and even if they exist in the diaper 1, the function of the functional agent has been lost. There was a possibility of

On the other hand, in the diaper 1 of the present embodiment, the unbroken microcapsules 81 are present in the concave portions 22 of the non-skin side sheet 32 . That is, in the present embodiment, the microcapsules 80 are provided in the recesses 22 when the diaper 1 is manufactured, and the microcapsules 80 in the recesses 22 are unlikely to be exposed during transportation. Therefore, the microcapsules 80 do not fall off or break from the diaper 1 during transportation, and can remain in the concave portions 22 as undamaged microcapsules 81 when the diaper 1 reaches the hand of the consumer.

Therefore, when the user uses the diaper 1, it is possible to allow the function of the functional agent in the microcapsules 80 to be exhibited appropriately. That is, at this time, the user moves the concave portion 22 by contacting the diaper 1 or the like to promote the exposure of the unbroken microcapsules 81 in the concave portion 22, thereby releasing the functional agent to the outside. The function is appropriately exhibited (the function is appropriately exhibited at the timing when the function of the functional agent should be exhibited (at the time of use, not during transportation)). The width dimension of the waist member 20 in the natural state is smaller than the width dimension of the waist member 20 when it is stretched to the maximum. can be stretched to At this time, the recessed portion 22 changes (for example, the unevenness is eliminated), so that the functional material is appropriately released to the outside and the function of the functional material is exhibited.

In the present embodiment, as described above, not only undamaged microcapsules 81 but also damaged microcapsules 82 are present in the outermost layer (non-skin side sheet 32) of waist member 20 (front waist portion 30). However, the damaged microcapsules 82 have the advantage of making the user of the diaper 1 feel the function of the functional agent from the time immediately before using (wearing) the diaper 1, such as when the diaper 1 is taken out. ing.

In addition, in the present embodiment, at least one unbroken microcapsule 81 exists in the convex portion 23 formed in the outermost layer (non-skin side sheet 32) by wrinkles (see FIG. 5), and the microcapsules in the concave portion 22 Due to the difficulty of exposing the capsules 80 during transportation, the basis weight (g/m 2 ) of the unbroken microcapsules 81 in the concave portions 22 is lower than the basis weight (g/m ² ) of the unbroken microcapsules 81 in the convex portions 23 . m ² ) is higher.

Therefore, the exposure of the unbroken microcapsules 81 is moderately suppressed during use (wearing) of the diaper 1, and the function of the functional agent in the microcapsules 80 is gradually exhibited. Therefore, it becomes possible to maintain the function of the functional agent for a long time.

It should be noted that the presence of microcapsules 80 (unbroken microcapsules 81 and broken microcapsules 82) in the concave portions 22 and convex portions 23 and the fact that the basis weight of the unbroken microcapsules 81 in the convex portions 23 is greater than the basis weight of the unbroken microcapsules 81 in the concave portions 22 The fact that the basis weight of the damaged microcapsules 81 is higher can be easily confirmed (determined) by observing the microcapsule arrangement region 70 with an electron microscope or the like.

Next, the microcapsule placement area 70 will be described in detail. As can be understood from the above description, the microcapsule arrangement area 70 is an area in which both the unbroken microcapsules 81 and the broken microcapsules 82 are arranged. Further, as described above, the microcapsule arrangement region 70 can be specified by observing the microcapsules 80 with a microscope or the like. In addition, the microcapsule placement region 70 also contains a solvent, and since the glossiness differs depending on the presence or absence of the solvent, it is also possible to visually check the solvent.

As shown in FIG. 4, a plurality (three) of microcapsule arrangement regions 70 are arranged side by side at intervals in the vertical direction, and form stripe-like regions extending in the horizontal direction. In other words, the microcapsule arrangement area 70 is divided into a plurality of areas, and each area is a streaky area along the left-right direction (horizontal direction). These multiple areas are arranged in a vertical direction at intervals.

If these three areas are connected, when moisture (body fluid) such as sweat comes into contact with the microcapsules 80 in one area, the moisture is absorbed by the plurality of microcapsules 80 in the area. There is a possibility that it will be transmitted to the microcapsules 80 in other regions. In this case, the function of the functional agent is exerted at once in all regions, and the function of the functional agent may not last long.

In contrast, in the present embodiment, since a plurality of (three) regions are provided at intervals, even if moisture (body fluid) such as sweat touches the microcapsules 80 in one region, It is possible to avoid that a plurality of microcapsules 80 in the area cooperate to transmit moisture to microcapsules 80 in other areas. Therefore, the function of the functional agent is not exerted at once in the entire region, and the function of the functional agent can be maintained for a long time.

Further, in the present embodiment, the microcapsule arrangement area 70 is a strip-like lateral area extending in the lateral direction, and the lateral area is a stretchable area that can be stretched in the lateral direction. That is, as described above, the waist elastic member 35 is provided in the waist member 20 (the front waist portion 30) in which the microcapsule arrangement region 70 is arranged, and the waist member 20 is stretched by the stretchability of the waist elastic member 35. (Front waist part 30) is an elastic region that can be expanded and contracted in the left-right direction. Further, since the microcapsule arrangement area 70 is provided in the waist member 20 (front waist part 30) so as to form a streaky left-right area along the left-right direction, the microcapsule arrangement area 70 (left-right area) is also provided. It is an elastic area that can be expanded and contracted in the horizontal direction.

Since the microcapsule arrangement area 70 (horizontal direction area) can be expanded and contracted in the horizontal direction, as shown in FIG. , and the convex portions 23 are arranged alternately. Therefore, if the microcapsule arrangement area 70 is provided along the horizontal direction, the microcapsules 80 can be reliably present in the concave portion 22 (and also in the convex portion 23). If the microcapsule arrangement area 70 were to be provided not in the horizontal direction but in the vertical direction (the direction penetrating the paper surface in FIG. 5), depending on the width of the area in the horizontal direction, all such areas would be the convex portions 23 (reverse direction). In addition, there is a possibility that all the recesses 22 will be formed), and the microcapsules 80 cannot be provided in the recesses 22. However, such a situation can be reliably avoided.

In addition, in the present embodiment, as shown in FIG. 4, the microcapsule arrangement region 70 extends continuously in the left-right direction from the left end to the right end of the waist member 20 (front waist portion 30). ing). Therefore, when the diaper 1 is unfolded and viewed in the thickness direction (see FIG. 4), at least a portion of the microcapsule arrangement region 70 and the side joint portion 50 overlap (in the present embodiment, , part of the microcapsule placement region 70 and part of the side junction 50 overlap).

Therefore, by overlapping the microcapsule arrangement region 70 and the side joints 50, the peel strength of the overlapped portion is weakened (the side joints 50 are easily broken), and the diaper 1 can be easily taken off.

In addition, the waist member 20 (front waist part 30) has a non-joint part 52 where the front waist part 30 and the rear waist part 40 are not joined outside the side joints 50 in the left-right direction. When viewed in the thickness direction in the unfolded state (see FIG. 4), the microcapsule arrangement region 70 and the non-bonded portion 52 also overlap at least partially (in the present embodiment, the microcapsule arrangement region 70 and a portion of the non-bonded portion 52 overlap).

As is clear from FIG. 1 , the non-bonded portion 52 is a portion that is most likely to be physically stimulated by the underwear (easily rubbed against the underwear) when the underwear is worn over the diaper 1 . Therefore, since the microcapsule arrangement region 70 and the non-joint portion 52 overlap each other, the microcapsules 80 positioned in the non-joint portion 52 (the waist member 20) are more likely to receive physical stimulation from the underwear. release is promoted, and the function of the functional agent can be appropriately exhibited.

Further, in the present embodiment, as shown in FIGS. 3 and 4, when the diaper 1 is unfolded and viewed in the thickness direction (see FIG. 4), the microcapsule arrangement region 70 and the waist member At least a portion of the liquid-impermeable sheet 13a as an example of a film material provided on the skin side of the 20 overlaps (in the present embodiment, a portion of the microcapsule arrangement region 70 and the liquid A portion of the impermeable sheet 13a overlaps).

Therefore, even if the microcapsules 80 located in the waist member 20 are broken and the functional agent is released from the microcapsules 80, the functional agent is blocked by the liquid-impermeable sheet 13a and hardly moves to the skin side. Therefore, the functional agent is more likely to be released to the non-skin side (outside of the diaper 1) than to the skin side, and the functional agent that is released to the non-skin side works effectively (for example, repellent), it is possible to appropriately exhibit the function of the functional agent.

As the film material, the liquid-impermeable sheet 13a has been described as an example, but the film material is not limited to this. As another example, for example, a print sheet on which patterns and characters are printed and inserted into the diaper 1 can be mentioned.

Further, in the present embodiment, as shown in FIGS. 3 and 4, when the diaper 1 is unfolded and viewed in the thickness direction (see FIG. 4), the microcapsule arrangement region 70 and the absorbent core 11 at least partially overlap (in the present embodiment, a portion of the microcapsule arrangement region 70 and a portion of the absorbent core 11 overlap).

The overlapping portion between the microcapsule placement region 70 and the absorbent core 11 is relatively stiffer than the surrounding area due to the presence of the absorbent core 11 . Therefore, the highly rigid absorbent core 11 serves as a pedestal, making it easier for the user to rub the microcapsule arrangement area 70 . Therefore, by efficiently breaking (cracking) the microcapsules 80, the release of the functional agent to the outside is promoted, and the function of the functional agent can be exhibited appropriately.

Further, in the present embodiment, as shown in FIG. 4, when the diaper 1 is unfolded and viewed in the thickness direction (see FIG. 4), the microcapsule arrangement region 70 and the non-stretchable region NS are separated. At least partly overlaps (in the present embodiment, part of the microcapsule arrangement region 70 and part of the non-stretchable region NS overlap). That is, the microcapsules 80 are arranged in part of the non-stretchable region NS.

In such a case, since the microcapsules 80 are also provided in the non-stretchable region, the user did not stretch the waist member 20 sufficiently when wearing it (the microcapsules 80 in the recess 22 were not sufficiently exposed). Even in this case, the functional agent is released to the outside from the region, and the function of the functional agent can be appropriately exhibited.

In addition, the waist member 20 (front waist portion 30) has an upper region FU and a lower region FL when the waist member 20 (front waist portion 30) is vertically divided into two in the stretched state. , the microcapsules 80 (unbroken microcapsules 81) are arranged at least in the lower region FL (in the present embodiment, they are arranged only in the lower region FL, but in the upper region FU not prevent it from being placed).

In addition, as described above, the waist elastic member 35 is provided in the waist member 20 (front waist portion 30), and the elasticity of the waist elastic member 35 causes the waist member 20 (front waist portion 30) to move in the lateral direction. It is a stretchable area that can be stretched and stretched. Since the waist elastic members 35 are provided in both the upper region FU and the lower region FL, the upper region FU and the lower region FL are elastic regions that can be expanded and contracted in the left-right direction. In the present embodiment, the contractile force of the upper region FU is greater than the contractile force of the lower region FL (that is, the upper region FU has a stronger contraction force than the lower region FL).

Here, the “contraction force” of the upper region FU (lower region FL) is a force (stretching stress) for stretching the upper region FU (lower region FL) by a unit length in the horizontal direction. The contractile force of the upper region FU and the contractile force of the lower region FL can be compared, for example, by the following method. First, the side joints 50 of the diaper 1 (product) shown in FIG. 1 are peeled off to form the diaper 1 as shown in FIG. Next, the diaper 1 is cut at the central position CL shown in FIG. 2 so that only the front half of the diaper 1 is formed. Next, both ends in the left-right direction of the upper region FU (lower region FL) are gripped by chucks of a tensile tester. The distance between chucks is adjusted so that the diaper 1 is not slack and stretched. Then, the distance between the chucks is widened at a predetermined speed with a tensile tester, and the load when the upper region FU (lower region FL) is extended in the horizontal direction by a unit length is obtained, and the load of the upper region FU is obtained. Compare the loads in the lower region FL.

As described above, in the present embodiment, the microcapsules 80 (unbroken microcapsules 81) are arranged in the lower region FL where the contractile force is smaller. Therefore, the following effects are obtained.

When using (wearing) the diaper 1, the user tends to touch the upper region FU more than the lower region FL. Therefore, if the microcapsules 80 were arranged only in the upper region FU, most of the functional agent would be released to the outside when the diaper 1 was put on, and the function of the functional agent would be less likely to be exhibited during wearing. there is a risk of becoming In the present embodiment, the microcapsules 80 (unbroken microcapsules 81) are arranged in the lower region FL. Therefore, at the timing when the diaper 1 is put on, the release of the functional agent from the microcapsules 80 in this region is It is suppressed, and the function of the functional agent can be maintained for a long time. Furthermore, since the lower region FL is a region with a relatively small contractile force, even when wearing the diaper 1 in which physical stimulation is relatively less likely to occur than when the diaper 1 is worn, the inside of the concave portion 22 can be reduced. It is possible to accelerate the exposure of the microcapsules 80 (unbroken microcapsules 81) with a small stimulus and appropriately release the functional agent to the outside. Such an effect is exhibited particularly effectively, for example, when the repellent that is desired to exhibit its function continuously while the diaper 1 is worn is a functional agent.

In addition, in order to adjust the contractile force of the upper region FU (lower region FL), the number of waist elastic members 35, the thickness of the thread-like waist elastic members 35, and the expansion ratio when fixing the waist elastic members 35 to the sheet should be adjusted.

=== Second Embodiment ===
FIG. 6 is a view corresponding to FIG. 2, and is a plan view of the diaper 1 according to the second embodiment in an unfolded and stretched state. FIG. 7 is a view corresponding to FIG. 3, and is a schematic cross-sectional view taken along line AA of FIG. FIG. 8 is a diagram corresponding to FIG. 4 and an explanatory diagram of the microcapsule arrangement region 70 in the second embodiment.

Unlike the first embodiment, the diaper 1 according to the second embodiment is provided with skin sheets 36 and 46 . That is, the skin sheet 36 is laminated on the skin side of the front waist portion 30 . As shown in FIG. 7, the skin sheet 36 is a sheet member arranged so as to cover (straddle in the vertical direction) the upper end 10ea (the front end in the longitudinal direction) of the ventral side of the absorbent main body 10 from the skin side. It has a function as a cover sheet. This prevents the top edge of the absorbent body 10 from digging into the wearer's skin when the diaper 1 is worn. The skin sheet 36 is made of, for example, SMS nonwoven fabric. Also, the skin sheet 36 may be a sheet member (for example, a stretchable nonwoven fabric) having stretchability in the left-right direction.

As with the front waistline portion 30 , a skin sheet 46 is laminated on the skin side of the rear waistline portion 40 . As shown in FIG. 7, the skin sheet 46 is a sheet member arranged so as to cover the upper end 10eb (rear end in the longitudinal direction) on the back side of the absorbent body 10 from the skin side (straddle in the vertical direction). is.

In the diaper 1 according to the second embodiment, as shown in FIG. 7, microcapsules are arranged between the skin-side sheet 41 and the skin-surface sheet 46 of the waist member 20 (rear waist portion 40) in the thickness direction. A region 70 is located. In the manufacturing process of the diaper 1 according to the second embodiment, the microcapsules 80 are applied to the skin sheet 46, and the skin sheet 46 is attached to the absorbent main body 10 and the waist member so that the coated surface is positioned on the non-skin side. 20 (rear waist portion 40). At that time, the microcapsules 80 are sandwiched between the skin-surface sheet 46 and the skin-side sheet 41 , and part of them is transferred to the skin-side sheet 41 . Therefore, in the diaper 1 according to the second embodiment, the microcapsules 80 are provided (exist) in the waist member 20 (rear waist portion 40) (the microcapsule arrangement region 70 is located at the rear). located in the side girth 40).

Further, as shown in FIG. 7, in the second embodiment, microcapsules 80 are provided (exist) in the outermost layer of the waist member 20 (rear waist portion 40). The outermost layer of the waist member 20 (rear waist portion 40) includes the skin-side sheet 41 and the non-skin-side sheet 42. In the second embodiment, the skin-side sheet 41 is provided with the microcapsules 80. (However, it is not limited to this, and may be the non-skin side sheet 42).

Furthermore, in the second embodiment, the microcapsules 80 are provided (exist) in the concave portions 22 and the convex portions 23 of the outermost layer (skin side sheet 41) of the waist member 20 (rear waist portion 40). . As described above, the waist elastic member 45 is provided in the waist member 20 (rear waist portion 40), and the elasticity of the waist elastic member 45 causes the waist member 20 (rear waist portion 40) to move in the lateral direction. It is a stretchable area that can be stretched and stretched. Therefore, the waist elastic member 45 causes a plurality of wrinkles in the waist member 20 (rear waist portion 40) in a natural state, and the recesses 22 and the protrusions 23 of the back waist portion 40 (skin side sheet 41) are formed. , for example, by the wrinkles.

Further, in the second embodiment, since the microcapsule arrangement area 70 is arranged between the skin side sheet 41 and the skin surface sheet 46 of the waist member 20 (rear side waist portion 40) in the thickness direction, FIG. 2, the skin sheet 46 plays a role of a covering member covering the microcapsules 80 (microcapsule arrangement area 70).

That is, in the second embodiment, the diaper 1 is provided with a cover member (skin sheet 46 ) that covers the microcapsule arrangement area 70 . Therefore, the microcapsules 80 in the recesses 22 are more difficult to be exposed during transportation. Therefore, the microcapsules 80 do not fall off or break from the diaper 1 during transportation, and can more reliably remain as unbroken microcapsules 81 in the recesses 22 when the diaper 1 reaches the consumer. . Therefore, when the user uses the diaper 1, it is possible to more appropriately exhibit the function of the functional agent in the microcapsules 80.

Further, in the second embodiment, unlike the first embodiment, as shown in FIGS. 7 and 8, when the diaper 1 is unfolded and viewed in the thickness direction (see FIG. 8), the microscopic The capsule arrangement area 70 and the liquid impermeable sheet 13a as an example of the film material provided closer to the skin than the waist member 20 do not overlap.

Therefore, when the microcapsules 80 located in the waist member 20 are broken and the functional agent is released from the microcapsules 80, the functional agent is blocked by the liquid-impermeable sheet 13a unlike the first embodiment. no. Therefore, the functional agent is easily released to the skin side, and in the case of a functional agent (for example, a cooling sensation agent) that works effectively by being released to the skin side, the function of the functional agent can be appropriately controlled. It is possible to demonstrate.

Similarly to the front waistline portion 30, the rear waistline portion 40 has an upper region BU and a lower region BL when the rear waistline portion 40 is vertically divided into two in the stretched state. Here, unlike the front waist portion 30, the rear waist portion 40 includes a buttock cover 40b. The rear waist portion 40 (in other words, the portion of the rear waist portion 40 having the non-bonded portions 52 at both ends) is defined by vertically dividing it into two parts (see FIG. 8). The microcapsules 80 (unbroken microcapsules 81) are arranged at least in the upper region BU (in the second embodiment, they are arranged only in the upper region BU, but they are arranged in the lower region BL). does not prevent it).

In addition, as described above, the waist elastic member 45 is provided in the waist member 20 (rear waist portion 40), and the elasticity of the waist elastic member 45 causes the waist member 20 (rear waist portion 40) to It is an elastic area that can be expanded and contracted in the horizontal direction. Since the waist elastic members 45 are provided in both the upper region BU and the lower region BL, the upper region BU and the lower region BL are elastic regions that can expand and contract in the left-right direction. In the second embodiment, the contractile force of the upper region BU is greater than the contractile force of the lower region BL (that is, the upper region BU has a stronger contraction force than the lower region BL).

Thus, in the second embodiment, the microcapsules 80 (unbroken microcapsules 81) are arranged in the upper region BU where the contractile force is greater. Therefore, the following effects are obtained.

When the microcapsules 80 (unbroken microcapsules 81) are arranged in the upper region BU where the contractile force is greater, the upper region BU is a region where the contractile force is relatively large, and wrinkles become deeper. The exposure of the microcapsules 80 in the recesses 22 of the upper region BU during transportation becomes more difficult. Therefore, the microcapsules 80 do not fall off or break from the diaper 1 during transportation, and can more reliably remain as unbroken microcapsules 81 in the recesses 22 when the diaper 1 reaches the consumer. .

In addition, the user tends to touch the upper region BU more than the lower region BL when using (wearing) the diaper 1 . Therefore, when the user touches the upper region BU when putting on the diaper 1, the functional agent is released at once from the microcapsules 80 (unbroken microcapsules 81) remaining in the concave portions 22 of the upper region BU. be.

Therefore, it is possible for the user (wearer) to surely feel the function of the functional agent at the timing of starting to use (wear) the diaper 1 . Such an effect is especially obtained when, for example, the functional agent is a cooling sensation agent that is desired to exhibit its function at the timing of starting use (wearing) of the diaper 1 (a feeling of coolness can be experienced at the moment the diaper 1 is put on). effectively demonstrated.

=== Third Embodiment ===
FIG. 9 is a diagram corresponding to FIG. 4 and an explanatory diagram of the microcapsule arrangement region 70 in the third embodiment.

In the third embodiment, unlike the first and second embodiments, the microcapsule arrangement regions 70 are arranged in both the front waistline portion 30 and the rear waistline portion 40 .

Then, the undamaged microcapsules in the front waistline portion 30 in the stretched state (see FIG. 9) are higher than the basis weight (g/m ² ) of the unbroken microcapsules 81 in the back waistline portion 40 in the stretched state (see FIG. 9). The basis weight (g/m ² ) of 81 is higher. That is, the total weight (g) of the undamaged microcapsules 81 provided in the rear waist portion 40 is divided by the area (m ² ) of the rear waist portion 40 in the stretched state. The value obtained by dividing the total weight (g) of the unbroken microcapsules 81 provided in the front waist part 30 in the stretched state (m ² ) is larger.

Since the wearer of the diaper 1 usually has a bulging belly, the front waist portion 30 is easier to contact (close to) the wearer than the back waist portion 40 . Therefore, the front waist portion 30 facilitates the exposure of the unbroken microcapsules 81 in the concave portions 22 in accordance with the movement of the wearer, and facilitates the efficient release of the functional agent to the outside. In the third embodiment, more unbroken microcapsules 81 are provided on the side where the functional agent is more likely to be released efficiently from the viewpoint of the body shape of the wearer of the diaper 1 (front waist portion 30 side). Therefore, it becomes possible to exhibit the function of the functional agent more appropriately.

Further, in the third embodiment, since the microcapsule arrangement regions 70 are arranged in both the front waistline portion 30 and the rear waistline portion 40, the concave portions 22 of the front waistline portion 30 and the rear waistline portion 40 are not damaged. At least one microcapsule 81 is present. The total number of unbroken microcapsules 81 in the recesses 22 of the front waistline portion 30 and the total number of unbroken microcapsules 81 in the recesses 22 of the rear waistline portion 40 are different from each other.

Therefore, the sustained release property of the functional agent (the extent to which the functional agent is gradually released from the microcapsules 80) is appropriately adjusted. For example, if the number of the front waist portions 30 is increased, as described above, the sustained release property is lowered from the viewpoint of the body shape of the wearer of the diaper 1. Conversely, the sustained release property is increased (function It is possible to maintain the function of the agent for a long time).

Note that the basis weight of the unbroken microcapsules 81 in the front waist portion 30 is higher than the basis weight of the unbroken microcapsules 81 in the rear waist portion 40, and the fact that the unbroken microcapsules 81 in the recess 22 is different between the front waistline portion 30 and the rear waistline portion 40 can be easily confirmed (determined) by observing the microcapsule arrangement region 70 with an electron microscope or the like. For example, it is possible to photograph 10 randomly selected locations with a microscope and compare the number of microcapsules contained in the photographed photograph.

In the third embodiment, as shown in FIG. 4, a plurality of microcapsule arrangement regions 70 are arranged side by side at intervals in the left-right direction, and form streak-like vertical regions along the vertical direction. (See microcapsule placement area 70 located in back waistline 40 in FIG. 9). That is, the microcapsule arrangement area 70 is divided into a plurality of areas, and each area is a streaky area along the vertical direction (longitudinal direction). These multiple areas are arranged side by side at intervals in the left-right direction.

Therefore, the same effects as those described in the first embodiment are also achieved in the third embodiment. If these multiple areas are connected, when moisture (body fluid) such as sweat in one area comes into contact with the microcapsules 80, the moisture is transferred to the other microcapsules 80 in cooperation with each other. There is a possibility that it will be transmitted to the microcapsules 80 in the area of . In this case, the function of the functional agent is exerted at once in all regions, and the function of the functional agent may not last long.

On the other hand, in the third embodiment, since a plurality of regions are provided at intervals, even if moisture (body fluid) such as sweat comes into contact with the microcapsules 80 in one region, the moisture is absorbed within the region. It is possible to avoid that a plurality of microcapsules 80 in one area cooperate and transmit to microcapsules 80 in other areas. Therefore, the function of the functional agent is not exerted at once in the entire region, and the function of the functional agent can be maintained for a long time.

===Other Embodiments===
Although the embodiments of the present invention have been described above, the above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit and interpret the present invention. Further, the present invention can be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof.

In the above embodiment (third embodiment), the basis weight (g/m ² ) of the unbroken microcapsules 81 in the stretched back waistline portion 40 is higher than the unbroken microcapsules in the stretched front waistline portion 30 . Although the basis weight (g/m ² ) of the capsules 81 is higher, it is not limited to this. The basis weight (g/m ² ) of the unbroken microcapsules 81 in the stretched back waist portion 40 may be higher than the weight (g/m ² ). That is, the total weight (g) of the undamaged microcapsules 81 provided in the front waist portion 30 is divided by the area (m ² ) of the rear waist portion 40 in the stretched state. The value obtained by dividing the total weight (g) of the unbroken microcapsules 81 provided in the rear waist portion 40 in the stretched state (m ² ) may be larger.

In such a case, since the rear waist portion 40 is a region that is likely to come into close contact with the user in a sitting position or a sleeping position, the functional agent can be efficiently released to the outside during the sitting position or sleeping position, and the function of the functional agent can be improved. can be properly exhibited.

In the above embodiment, the contractile force of the upper region BU is greater than the contractile force of the lower region BL, but the present invention is not limited to this. It may be greater than the contractile force of the BU. In such a case, if the microcapsules 80 (unbroken microcapsules 81) are arranged at least in the upper region BU, the contraction force of the upper region BU is relatively small when the diaper 1 is put on. Due to this, the diaper 1 is easily spread, and the exposure of the microcapsules 80 (unbroken microcapsules 81) is facilitated at the waist end where the wearer tends to feel the effect of the functional agent (thus, the functional agent is efficiently released. released to the outside). On the other hand, when the microcapsules 80 (unbroken microcapsules 81) are arranged at least in the lower region BL, the microcapsules 80 (unbroken microcapsules 81) are located in the lower half of the diaper 1, which is difficult for clothes to touch when or during wearing. Since the microcapsules 81) are arranged and the contractile force of the lower half is relatively large, the function of the functional agent can be maintained for a long time.

In addition, a plurality of types of waist elastic members 35 and 45 (for example, a first elastic member and a second elastic member) having different extension ratios are provided in the waist member 20 (the front waist portion 30 and the rear waist portion 40). microcapsules 80 (unbroken microcapsules 81) in both the first region of the waist member 20 provided with the first elastic member and the second region of the waist member 20 provided with the second elastic member. is preferably provided. In addition, the waist member 20 (the front waist portion 30 and the rear waist portion 40) is provided with a plurality of regions in which a plurality of waist elastic members 35 and 45 are arranged side by side at intervals. When the pitches (installation intervals) of the waist elastic members 35 and 45 are different from each other, it is preferable to provide microcapsules 80 (unbroken microcapsules 81) in both regions.

Then, since the microcapsules 80 (unbroken microcapsules 81) are arranged in both the region where the contractile force is relatively large and the region where the contractile force is relatively small, the number (ratio) of both microcapsules 80 is adjusted. , it becomes possible to control the degree of functional expression of the functional material.

1 diaper (absorbent article),
10 absorbent body,
10ea superior (anterior, ventral), 10eb superior (posterior, dorsal),
11 absorbent core, 11b core wrap sheet, 11c neck portion,
12 topsheet,
13 back sheet, 13a liquid-impermeable sheet (film), 13b exterior sheet,
20 waist member,
22 concave portion, 23 convex portion,
30 front girth,
30sw side,
31 skin side sheet, 32 non-skin side sheet,
35 waist elastic member,
36 skin sheet,
40 rear waist part, 40b buttock cover,
40sw side,
41 skin side sheet, 42 non-skin side sheet,
45 waist elastic member,
46 skin sheet, 47 rear leg elastic member,
50 side joints, 52 non-joints,
60 body joint,
61 front body joint, 62 rear body joint,
70 microcapsule placement area,
80 microcapsules,
81 unbroken microcapsules, 82 broken microcapsules,
BH waist opening, LH leg opening,
BL lower region, BU upper region, FL lower region, FU upper region,
CL center position (longitudinal direction, longitudinal direction), H inflection point NS non-stretchable region, OL30 front overlapping region, OL40 rear overlapping region,

Claims (15)

an absorbent body; and a waist member disposed on the non-skin side of the absorbent body and forming part of the waist opening and the leg openings,
An absorbent article in which the waist member has wrinkles in a natural state,
In the outermost layer of the waist member, as microcapsules encapsulating the functional agent, there are at least partially damaged damaged microcapsules and undamaged undamaged microcapsules,
An absorbent article, wherein at least one of the unbroken microcapsules is present in a recess formed in the outermost layer by the wrinkles. The absorbent article according to claim 1,
At least one unbroken microcapsule is present in the convex portion formed on the outermost layer by the wrinkles,
An absorbent article, wherein the basis weight of the unbroken microcapsules in the concave portion is higher than the basis weight of the unbroken microcapsules in the convex portion. The absorbent article according to claim 1 or 2,
having a vertical direction and a horizontal direction that intersect with each other,
The waist member has an upper region and a lower region when the waist member is divided into two in the vertical direction in a stretched state, and the upper region and the lower region are elastic regions that can be stretched in the horizontal direction. and
the unbroken microcapsules are disposed at least in the upper region;
An absorbent article, wherein the contractile force of the upper region is greater than the contractile force of the lower region. The absorbent article according to claim 1 or 2,
having a vertical direction and a horizontal direction that intersect with each other,
The waist member has an upper region and a lower region when the waist member is divided into two in the vertical direction in a stretched state, and the upper region and the lower region are elastic regions that can be stretched in the horizontal direction. and
the unbroken microcapsules are disposed at least in the lower region;
An absorbent article, wherein the contractile force of the upper region is greater than the contractile force of the lower region. The absorbent article according to any one of claims 1 to 4,
Having a film material on the skin side of the waist member,
A microcapsule arrangement region in which the unbroken microcapsules are arranged and the film material at least partially overlap when the absorbent article is unfolded and viewed in the thickness direction. absorbent article. The absorbent article according to any one of claims 1 to 4,
Having a film material on the skin side of the waist member,
An absorbent article characterized in that, when viewed in the thickness direction of the unfolded absorbent article, a microcapsule arrangement region where the unbroken microcapsules are arranged and the film material do not overlap. The absorbent article according to any one of claims 1 to 6,
having a vertical direction and a horizontal direction that intersect with each other,
The waist member has a front waist portion and a rear waist portion, and includes side joints at both ends in the left-right direction for joining the front waist portion and the rear waist portion,
A microcapsule arrangement region in which the unbroken microcapsules are arranged and the side joint portion at least partially overlap when viewed in the thickness direction in the unfolded state of the absorbent article. absorbent article. The absorbent article according to claim 7,
The waist member includes a non-joint portion where the front waist portion and the rear waist portion are not joined to the outside of the side joint portion in the left-right direction,
A microcapsule arrangement region in which the unbroken microcapsules are arranged and the non-bonded portion at least partially overlap when the absorbent article is unfolded and viewed in the thickness direction. absorbent article. The absorbent article according to any one of claims 1 to 8,
An absorbent article, comprising a covering member covering a microcapsule arrangement region in which the unbroken microcapsules are arranged. The absorbent article according to any one of claims 1 to 9,
having a vertical direction and a horizontal direction that intersect with each other,
The microcapsule arrangement regions in which the unbroken microcapsules are arranged are streak-like lateral regions along the lateral direction, which are provided side by side at intervals in the vertical direction, or An absorbent article, comprising: a plurality of vertically spaced streak-like vertical regions along the vertical direction. The absorbent article according to claim 10,
The absorbent article, wherein the microcapsule arrangement region is the lateral direction region, and the lateral direction region is a stretchable region capable of stretching in the lateral direction. The absorbent article according to any one of claims 1 to 9,
having a vertical direction and a horizontal direction that intersect with each other,
The microcapsule placement region in which the unbroken microcapsules are arranged is a streaky left-right direction region along the left-right direction, and the left-right direction region is a stretchable region that can be stretched in the left-right direction. An absorbent article characterized by: The absorbent article according to any one of claims 1 to 12,
The waist member has a front waist portion and a rear waist portion,
An absorbent article, wherein the basis weight of the unbroken microcapsules in the stretched front waistline portion is higher than the basis weight of the unbroken microcapsules in the stretched back waistline portion. The absorbent article according to any one of claims 1 to 12,
The waist member has a front waist portion and a rear waist portion,
An absorbent article, wherein the basis weight of the unbroken microcapsules in the stretched back waistline portion is higher than the basis weight of the unbroken microcapsules in the stretched front waistline portion. The absorbent article according to any one of claims 1 to 14,
The waist member has a front waist portion and a rear waist portion,
at least one unbroken microcapsule is present in the recesses of the front waistline portion and the rear waistline portion;
The absorbent article, wherein the total number of unbroken microcapsules in the recesses of the front waistline portion and the total number of unbroken microcapsules in the recesses of the back waistline portion are different from each other.

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