WO2009133745A1

WO2009133745A1 - Disposable absorptive article

Info

Publication number: WO2009133745A1
Application number: PCT/JP2009/056627
Authority: WO
Inventors: 健井畑; 麗浅野; 結城堀江
Original assignee: 大王製紙株式会社
Priority date: 2008-04-30
Filing date: 2009-03-31
Publication date: 2009-11-05
Also published as: CN102014831A; KR101553428B1; CN102014831B; KR20110013439A

Abstract

A disposable absorptive article having high temperature change efficiency and capable of more quickly achieving a greater temperature change. An absorbing body (56) has formed therein a pocket (57) penetrating in the front surface/rear surface direction through the absorbing body (56), extending from the center (CL) in the front-rear direction of an article to the front side of the article, and including that portion of the article which corresponds to 20% of the overall length (L5) of the article. A temperature changing substance (40) for cooling or heating urine by making contact with the urine is mounted in the pocket (57).

Description

Disposable absorbent article

The present invention relates to disposable absorbent articles such as disposable diapers and disposable absorbent pads used for so-called toilet training.

Conventionally, disposable disposable diapers for training use have been designed to make the wearer perceive urination by bringing urine into contact with the skin and emphasizing discomfort due to moisture. Since there is a possibility that it may lead to fogging, technical development has been performed to make the wearer perceive urination while keeping urine away from the skin.
A typical example is the use of a substance that causes a temperature change in urine by contact with urine, such as sorbitol (see, for example, Patent Documents 1 and 2). In the technique described in Patent Document 1, it is proposed to arrange a member containing a temperature change substance such as sorbitol on the body side of the absorption element. In the technique described in Patent Document 2, it is proposed that an element having a temperature change substance such as sorbitol sandwiched between an permeable layer and an impermeable layer is disposed on the absorbent core.
Japanese Patent No. 3922722 Japanese Patent No. 3830901

However, the conventional temperature change has a problem that both the degree of change and the change speed are insufficient for the amount of the temperature change substance used. For this reason, the conventional one has a low rate at which the wearer perceives and reports urination, for example, about 40% at most of disposable diapers for training containing cooling substances currently on the market.
Then, the main subject of this invention is providing the disposable absorbent article which is excellent in temperature change efficiency, and can exhibit a larger temperature change faster.

As a result of earnest research on the above problems, the present inventors have obtained the following knowledge. That is, if the temperature-changing substance is simply contained in the absorber, urine held in the absorber without contacting the temperature-changing substance not only inhibits the temperature change but also the temperature-changing substance in the absorber. Even if the temperature change action due to is expressed, the temperature change is blocked by the heat insulating action inherently possessed by the absorber. In addition, when it is attempted to efficiently express the temperature change action by the temperature change substance, it seems to be desirable to arrange the temperature change substance at the urination site, but the urination site is the site where urine is supplied most continuously. The temperature change generated by the urine supplied earlier is weakened or canceled by the temperature of the urine supplied later. Moreover, these phenomena have an extremely large influence on the temperature change performance. The present invention has been made based on such knowledge.

<Invention of Claim 1>
It has a front side portion that extends to the front side from the center in the longitudinal direction of the article, and a rear side portion that extends to the rear side from the center in the longitudinal direction of the article,
In a disposable absorbent article comprising an absorbent portion in which an absorber is interposed between a liquid-permeable top sheet and a back sheet,
The absorbent body extends 30 to 48% of the total length of the article from the center in the longitudinal direction of the article to the front side.
The absorbent body has a pocket portion having a thickness of 0 to 50% of the surrounding area including a portion of 20% of the total length of the article from the center in the longitudinal direction of the article, and the front end of the pocket portion and the absorbent body Formed so that the distance from the front end of the product is 5 to 30% of the total length of the article,
In the pocket portion, a temperature change substance that cools or heats urine by contact with urine is disposed,
A disposable absorbent article characterized by that.

(Function and effect)
In the present invention, urine that has passed through the surface sheet during urination and has been absorbed by the absorber has sufficiently moved to the front side by the diffusion action, and then comes into contact with the temperature change substance in the pocket portion. As a result, a temperature change occurs in the pocket portion, and the temperature change is transmitted to the wearer's ventral portion without going through the absorber. Thus, when the urine after sufficiently diffusing and moving has a structure that contributes to the temperature change, the temperature change generated by the previously supplied urine is weakened by the temperature of the urine supplied later, The phenomenon of canceling out can be avoided, and a temperature change corresponding to the amount of the temperature change substance used appears. Moreover, since the sufficient temperature change occurs in the pocket portion (front and back penetration portion), it is efficiently transmitted to the body. Therefore, according to this invention, it becomes a disposable absorbent article which is excellent in temperature change efficiency, and can exhibit a larger temperature change faster.

<Invention of Claim 2>
The temperature-changing substance causes endothermic reaction when dissolved in urine, cools urine, and has a solubility in 100 ml of water at a temperature of 20 ° C. of 30 g or more,
The basis weight of the temperature change substance in the pocket is 500 to 1000 g / m ² ;
The total area of the pocket portion is 2500 to 8000 mm ² .
The total amount of heat change that can occur in the absorber due to the temperature change material is 20 cal or more,
The calorie change per unit area of the portion having the temperature change substance is 1 cal / cm ² or more.
The disposable absorbent article according to claim 1.

(Function and effect)
By using such a performance and amount of the temperature changing substance in the pocket portion having such a size, the above-described effects of the present invention become more remarkable. In particular, when the temperature-changing substance is a substance that changes its temperature when dissolved in urine, if the amount of urine supplied to the pocket part is sufficient to dissolve almost all of the temperature-changing substance in the pocket part, the temperature-changed urine Since there is nothing to hold this, the problem of spreading to the surroundings is remarkable. However, since the absorbent article of the present invention has a structure in which urine after sufficiently diffusing and moving contributes to temperature change, part of the temperature change substance in the pocket portion remains undissolved and holds the urine whose temperature has changed. be able to. Then, since the urine held in the temperature change substance slowly advances the dissolution of the temperature change substance thereafter, the temperature change is more reliably transmitted to the wearer.

<Invention of Claim 3>
The absorber includes 120 to 200 g / m ^{2 of} hydrophilic fibers and 170 to 220 g / m ^{2 of} superabsorbent polymer particles, and the content of the superabsorbent polymer is higher than the content of the hydrophilic fibers. The disposable absorbent article according to claim 2, wherein the disposable absorbent article is large.

(Function and effect)
Since the pocket itself absorbs little or not at all, if the amount of urine supplied is large, the portion of the urine that has changed in temperature that cannot be held in the pocket will diffuse to the surroundings, Insufficient transmission of temperature changes. However, if the amount of the hydrophilic fiber used is small relative to the superabsorbent polymer, the liquid diffusibility in the absorbent body after the superabsorbent polymer absorbs moisture and expands into a jelly shape becomes low. In the vicinity of the boundary with the pocket portion in the absorber near the position, urine supplied to the pocket portion and changed in temperature does not return and diffuse into the absorber.

<Invention of Claim 4>
The disposable absorbent article according to claim 3, wherein a particulate temperature change substance is incorporated in the pocket portion as the temperature change substance.

<Invention of Claim 5>
Around the pocket portion, at least in the vicinity of the front end portion of the pocket portion, the superabsorbent polymer is disposed at the highest density compared to the other regions of the absorber.
The disposable absorbent article according to claim 4.

(Function and effect)
When the superabsorbent polymer is densely arranged around the pocket, at least near the front end of the pocket corresponding to the wearer's abdomen, it absorbs and maintains the temperature-changed urine to diffuse, and around the wearer's abdomen It is preferable because it can be limited to

<Invention of Claim 6>
The disposable absorbent article according to claim 5, wherein at least a part of the excretion indicator whose color is changed by contact with moisture is provided so as to overlap the pocket portion, and the temperature change substance has hygroscopicity.

(Function and effect)
In most training diapers, an excretion indicator is also used to inform the wearer that urination has occurred, but if the excretion indicator is provided so as to overlap the pocket of the absorber, a small amount of Urine is preferable because discoloration is good even in urine. Here, if the temperature change substance has hygroscopicity, it is not excreted due to contact with moisture in the air during storage (humidity) or contact with moisture released from the wearer's sweat or body during use. The excretion indicator will not change color.

<Invention of Claim 7>
The pocket portion fits in the range of 0 to 40% of the total length of the article from the center in the longitudinal direction of the article to the front side, the length in the longitudinal direction is 10 to 20% of the total length of the article, and the width is 25 to 60% of the total width of the absorber. The disposable absorbent article according to claim 5, wherein

(Function and effect)
If comprised in this way, a pocket part of sufficient size will come to be located in a wearer's abdominal part or lower abdominal part. And since the wearer's abdomen or lower abdomen swells relatively on the surface of the body, it becomes easy to approach the temperature change part in the pocket part. Therefore, the temperature change in the pocket portion is easily transmitted to the wearer.

<Invention of Claim 8>
The absorbent body extends 30 to 48% of the total length of the article from the center in the longitudinal direction of the article to the front side and 25 to 45% of the total length of the article on the rear side.
The pocket portion extends from the center in the front-rear direction of the article to 25 to 45% of the total length of the article on the front side, 20 to 40% of the total length of the article on the rear side, and extends along the center in the width direction of the article. 25-60% of the total width,
The disposable absorbent article according to claim 5.

(Function and effect)
Thus, it is preferable to provide the pocket portion containing the temperature change substance so as to include the urination position, because a sufficient temperature change can be generated even when the amount of urine is small or large.

<Invention of Claim 9>
The absorbent body extends 30 to 48% of the total length of the article from the center in the longitudinal direction of the article to the front side and 25 to 45% of the total length of the article on the rear side.
The pocket portion is formed in an annular shape so as to surround the central area of the absorbent body, and the line width thereof is 5 to 10% of the total length of the article. The central area extends from the center in the longitudinal direction of the article to the front side of the article. 15 to 35%, and 15 to 35% of the total length of the article on the rear side, extending along the center in the width direction of the article, and the width is 40 to 75% of the total width of the absorbent body.
The disposable absorbent article according to claim 5.

(Function and effect)
Since the urine absorbed in the absorber diffuses almost uniformly from the excretion position to the entire periphery, if a pocket portion containing a temperature change substance is provided in an annular shape so as to surround the central region, more urine is placed in the pocket portion. This is preferable because it can be brought into contact with the temperature change substance in the pocket portion even if the diffusion direction of urine is biased.

<Invention of Claim 10>
The disposable absorption according to claim 3, wherein the temperature-changing substance does not have a particulate portion in a state where it can freely move in at least a plane direction, or has only a small amount, and is arranged so as not to move most. Sex goods.

(Function and effect)
If the temperature change substance is contained in the form of powder and non-fixed as in the prior art, the temperature change substance moves from a predetermined site during the distribution process or use of the product, and the urine against the temperature change substance There is a risk that the temperature change becomes insufficient due to insufficient supply or temperature change not being sufficiently transmitted to the body. On the other hand, by arranging the temperature-changing substance so as not to have a particulate matter in a solid and freely movable state inside the absorbent article as described above, or to have only a small amount, Most of the temperature change material does not move. Therefore, an expected temperature change occurs.

<Invention of Claim 11>
The disposable absorbent article according to claim 10, wherein the absorbent body is entirely wrapped with a packaging sheet, and the temperature change substance is fused to at least one of the absorbent body and the packaging sheet.

(Function and effect)
A temperature change substance causes a temperature change by contact with moisture. Therefore, in order to increase the contact efficiency with moisture, to keep the moisture whose temperature has changed in a part closer to the skin, and to prevent the temperature changing substance from touching the skin directly, It is preferable to set it as the sheet | seat arrange | positioned between a sheet | seat and a packaging sheet, or a packaging sheet.

<Invention of Claim 12>
The disposable absorbent article according to claim 11, wherein the temperature change substance is fused and the fused temperature change substance is crushed.

(Function and effect)
By fusing the temperature change substance in the absorbent article in this manner, the temperature change substance is reliably held at a predetermined position and is difficult to move. Therefore, an expected temperature change occurs. Further, since the fused temperature change substance is crushed, the hardening due to the fusion of the temperature change substance is reduced. This form includes that a part of the temperature change substance is pulverized and dropped from the member to be fused. The term “fused” means a state in which the temperature change substance is solidified after adhering to the target (absorber) in a molten state, and the solidified body is fixed to the target.

<Invention of Claim 13>
The temperature change substance is sandwiched between a front surface side member and a back surface side member positioned on the front surface side and the back surface side, respectively, and a part thereof is fused to the front surface side member and the back surface side member, and the remaining portion is the It is not fused to the front side member and the back side member,
The fused portion of the temperature change material forms a frame shape, and the non-fused temperature change material is enclosed in a portion surrounded by the frame-like fused portion,
The disposable absorbent article according to claim 10.

(Function and effect)
In the prior art, since the temperature change substance is contained in a powder form in a non-fixed state, the temperature change substance moves from a predetermined site during the distribution process or use of the product, and moisture is supplied to the temperature change substance. There is a risk that the temperature change becomes insufficient due to lack of temperature, or the temperature change is not sufficiently transmitted to the body. As described above, this problem can be solved by fusing the temperature change substance to an appropriate member inside the absorbent article. However, the portion where the temperature change substance is fused becomes hard, and the absorbent article. There is a risk of damaging the flexibility.
On the other hand, as described above, the inner side of the frame-like fusion part fused to the front-side member and the rear-side member is surrounded by the front-side member and the rear-side member in the front-back direction, and the periphery is frame-like fusion. If it is surrounded by the part, the temperature change substance arranged on the inside can move only within the range of the frame-like fusion part even if it is not fused. Therefore, the movement of the temperature change substance is suppressed, and the desired temperature change occurs. Moreover, since the fusion part of the temperature change material is frame-shaped, it becomes much more flexible than the whole surface fusion, and it is possible to suppress hardening due to fusion of the temperature change material.
The term “fusion” means a state in which the temperature-changing substance is solidified after adhering to the object in a molten state, and the solidified body is fixed to the object. Further, the “frame shape” includes a form in which the fusion part of the temperature change substance is completely continuous, and a form having a partial discontinuity in a range in which the movement of the temperature change substance is suppressed.

<Invention of Claim 14>
A plurality of the frame-like fusion parts are arranged to form a lattice-like pattern, and the lattice-like pattern is a dotted-line fusion line in which the fusion parts and non-fusion parts of the temperature change substance are alternately arranged. The disposable absorbent article according to claim 13, which has a pattern in which at least one fusion line is discontinuous at each intersection position.

(Function and effect)
By providing the fusion part of the temperature change material in such a pattern, the fusion part of the temperature change material becomes discontinuous, and thus the hardening by the fusion part is further reduced.

<Invention of Claim 15>
The temperature changing material contains a high melting point temperature changing material having a relatively high melting point and a low melting point temperature changing material having a relatively low melting point, and the frame-like fused portion is the low melting point temperature changing material. The disposable absorbent article according to claim 13, wherein the high melting point temperature converting substance is contained as a non-fused temperature change substance in a part formed by fusing and surrounded by the frame-like fused part.

(Function and effect)
By using temperature change materials with different melting points, forming a frame-like fusion portion with a low-melting temperature change material, and disposing a high-melting temperature change material inside it, it is easy to form a frame-like fusion portion during production Become.

<Invention of Claim 16>
The disposable absorbent article according to claim 3, wherein a temperature-changing substance formed in a fiber shape is incorporated in the pocket portion as the temperature-changing substance.

(Function and effect)
Thus, by making the temperature change substance into a fibrous form and incorporating it in the pocket portion, the temperature change substance is reliably held at a predetermined position and does not move. Therefore, an expected temperature change occurs. Further, since the temperature change material is fibrous and the layer is flexible, even the portion having the temperature change material hardly undergoes hardening.

<Invention of Claim 17>
The disposable absorbent article according to claim 3, wherein a molded piece obtained by compression molding a particulate temperature change substance as the temperature change substance is incorporated in the pocket portion.

(Function and effect)
In the prior art, when using a temperature-change substance in the form of a granular material, the temperature-change substance is contained in a non-fixed state in the form of a powder, so that the temperature-change substance is in a predetermined part during the distribution process or use of the product. The temperature change may be insufficient due to the lack of moisture supply to the temperature change substance or the temperature change not being sufficiently transmitted to the body. There is. As a method for solving this problem, it was considered that a temperature change substance was melted and adhered to an appropriate member inside the absorbent article. In this case, the contact efficiency with moisture was reduced due to a decrease in the surface area of the temperature change substance. In addition, the temperature change efficiency may be reduced.
On the other hand, the molded piece obtained by compression molding the particulate temperature-change substance as described above moves through the gap between the members and the gap between the fibers as compared with the particulate one. hard. Therefore, the movement of the temperature change material can be suppressed by incorporating the molded piece of such a temperature change material in a state of being sandwiched between the front surface side member and the back surface side member. In addition, since the compression-molded piece of particles has a porous structure, the surface area, that is, the contact area with moisture is much larger than that of a simple solidified product of temperature-change substance particles, so that the temperature change efficiency is hardly reduced or If it drops, it will be less. Therefore, although the temperature change substance is difficult to move, a sufficient contact area with the moisture of the temperature change substance is ensured, so that a desired temperature change occurs.

<Invention of Claim 18>
The molded piece is formed by compression molding sugar alcohol particles having an average particle size of 200 to 600 μm and a bulk density of 0.50 to 0.70 g / cm ^{3 so} that the bulk density is 0.80 to 1.10 g / cm ^3. The disposable absorbent article according to claim 17, which is a porous piece obtained as described above.

(Function and effect)
When a cooling substance is used as the temperature change substance, sugar alcohol is preferable from the viewpoints of safety, stability (melting point, etc.), and availability. In this case, the average particle diameter of the particles before compression molding and the bulk of the molded piece It is particularly preferable that the density is within the above range.

<Invention of Claim 19>
19. The disposable absorbent article according to claim 18, wherein the molded piece is a flat piece having a thickness of 0.5 to 2.0 mm and an area of 50 to 1000 mm ² and a plurality or a plurality of pieces in the pocket portion.

(Function and effect)
When the basis weight of the temperature change substance is increased in this way, if the particles are contained as in the conventional manner, the particles tend to move when the particles overlap in the thickness direction. Therefore, it is suitable in such a case to use the temperature change substance as a molded piece. Further, when the basis weight of the temperature change substance is increased, if the molded piece is too thick or the area is too large, the user feels a foreign object. It is preferable to incorporate it.

As described above, according to the present invention, there are advantages such as a disposable absorbent article that is excellent in temperature change efficiency, faster and capable of exhibiting a larger temperature change.

Hereinafter, although an example of a pants-type disposable diaper (training pants) is drawn and explained about one embodiment of the present invention, it goes without saying that the present invention can be applied to a tape-type disposable diaper, a pad-type absorbent article, and the like. Nor.
1 to 9 show an example of a pants-type disposable diaper. In each figure, “front-rear direction” means a direction connecting the ventral side (front side) and back side (rear side), “width direction” means a direction (left-right direction) orthogonal to the front-rear direction, `` Vertical direction (vertical direction) '' means the wearing state of the diaper, that is, the direction orthogonal to the waistline direction with the diaper folded in two at the crotch so that both sides of the front and back of the diaper are overlapped, In other words, it means the direction connecting the waist opening WO side and the crotch side.

This pants-type disposable diaper has an abdominal exterior sheet 12F that covers the abdominal side of the wearer's girth and a back exterior sheet 12B that covers the back side, and both side edges in the width direction of the abdominal exterior sheet 12F. The both side edges in the width direction of the back side exterior sheet 12B are welded and joined by heat sealing, ultrasonic welding, or the like over the entire vertical direction, so that the cylindrical waistline portion 100 is formed. Reference numeral 12A denotes an individual welded portion, and a group of the welded portions 12A constitutes a side seal portion. When the backside exterior sheet 12B extends below the welded portion 12A as shown in the figure, the backside sheet is subjected to processing such as heat sealing integrally in the vertical range including this portion, The extension weld part 12E can be provided in the extension part 14. FIG. By providing the extended welded portion 12E, it is possible to prevent the second elongated elastic elastic member 16 from being pulled in the backside extended portion 14 described later. In this case, in consideration of the ease of tearing of the side portions, the welded portion 12A is generally composed of a group of small welded portions, and a bonding pattern with a low ratio of the welded area in the welded portion 12A is generally used. Since it is not necessary to consider the ease of tearing in the welded portion 12E, the second elongated elastic elastic member 16 is surely welded and fixed by making the ratio of the welded area higher than the welded portion 12A. May be. Further, the extended welded portion 12E can be welded by a curved line at the edge of the collar cover portion 14C, and the second elongated elastic elastic member 16 of the collar cover portion 14C can be prevented from being pulled.

In addition, the front end portion of the interior body 200 is connected to the inner surface of the belly side exterior sheet 12F in the width direction center portion of the waistline portion 100 by a hot melt adhesive or the like, and the interior body is disposed on the inner surface of the back side exterior sheet 12B in the width direction center portion. The rear end portions of 200 are connected by a hot melt adhesive or the like, and the abdominal exterior sheet 12F and the back exterior sheet 12B are not continuous on the crotch side and are separated from each other. This separation distance Y can be about 150 to 250 mm. Although not shown, a form in which the abdominal exterior sheet 12F and the back exterior sheet 12B are continuous in the crotch part, that is, a form in which the abdomen side to the back side are continuously covered with an integral exterior sheet may be employed.

As can be seen from FIGS. 7 and 8, the upper opening of the waistline portion 100 becomes a waist opening WO through which the wearer's torso passes, and the lower edge of the waistline portion 100 and the interior body 200 on both sides in the width direction of the interior body 200. The portions surrounded by the side edges are leg openings LO through which the legs pass. In the state where each welded portion 12A is peeled off and developed, an hourglass shape is formed as shown in FIG. The interior body 200 extends from the back side through the crotch part to cover the abdomen side, and is a part that receives the excrement and absorbs and retains the liquid. This is the part that supports the wearer.

(Exterior sheet)
The abdominal exterior sheet 12F and the back exterior sheet 12B are formed by laminating two sheet-

like materials

12 and 12 as shown in FIGS. 4 and 5. Although it extends only to the edge of the waist opening WO, the outer sheet-like material 12 positioned on the outside wraps around the edge on the waist side of the inner sheet-like material 12 and is folded back to the inside. 12r is extended so that it may cover to the waist side edge part of the interior body 200, and it is being fixed to the opposing surface with the hot-melt-adhesive agent. The sheet-like material 12 is not particularly limited as long as it can be joined by welding, but is preferably a nonwoven fabric. The nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spun lace method, a spun bond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. When using a nonwoven fabric, the basis weight is preferably about 10 to 30 g / m ² .

In the abdominal exterior sheet 12F and the back exterior sheet 12B, elongated elastic elastic members 15 to 19 such as thread rubber are stretched between the

sheet materials

12 and 12 in order to enhance fit to the waistline. Is provided at a rate. As the elongated elastic elastic members 15 to 18, 19T, and 19U, synthetic rubber or natural rubber may be used. Hot melt bonding, heat sealing, or ultrasonic bonding can be used for bonding the

sheet materials

12 and 12 of the

respective exterior sheets

12F and 12B and fixing the elongated elastic members 15 to 19 sandwiched therebetween. . If the entire surface of the

exterior sheets

12F and 12B is firmly fixed, the texture of the sheet is impaired, which is not preferable. By combining these, it is preferable that the elongated elastic elastic members 15 to 19 are firmly bonded, and the other portions are not bonded or are bonded weakly.

More specifically, the back-side exterior sheet 12B includes a back-side body portion 13 that occupies the same vertical range as the side seal portions by the welded portion 12A group, and a back-side extension that extends below the back-side body portion 13. And an exit portion 14. The back extension part 14 has a width direction center part 14 </ b> M overlapping with the interior body 200, and a buttock cover part 14 </ b> C extending on both sides thereof.

The shape of the dorsal extension 14 can be determined as appropriate, but in the illustrated example, the upper end of the dorsal extension 14 has the same width as the dorsal body 13 and extends below the dorsal body 13. The width is narrowed as the lower side approaches the crotch side. A portion having the same width as that of the back-side main body 13 can be omitted. If comprised in this way, the edge 14e of the width direction outer side of the buttock cover part 14C will come in the shape of a straight line or a curve which approaches the interior body 200 side as it approaches the crotch side, and it is easy to cover a buttock part. It becomes a shape.

Although the dimension of the back side extension part 14 can be determined suitably, as shown in FIG. 6, the width direction length 14x of the collar part cover part 14C (the edge 14e on the width direction outer side of the collar part cover part 14C and the inner body 200) More preferably, the maximum distance in the width direction with respect to the side edge is 80 to 160 mm, and the length 14y (extension length) in the vertical direction of the collar cover portion 14C is 30 to 80 mm. Further, assuming that the area of a quadrangle determined by the widest portion in the width direction and the widest portion in the vertical direction is S, the area of the back extension portion 14 is 20 to 80% of S, In particular, it is preferably about 40 to 60% because the outer appearance and wearing feeling of the buttocks are excellent.

The back body 13 can be conceptually divided into an upper end (waist part) W and a lower part U below the upper part in the vertical direction, and the range varies depending on the size of the product. The vertical length of the upper end W can be 15 to 80 mm, and the vertical length of the lower portion U can be 35 to 220 mm.

Between the inner side surface of the inner sheet-like material 12 and the outer side surface of the folded-back portion 12r of the outer sheet-like material at the upper end (waist portion) W of the back-side main body portion 13, a plurality of pieces are continuously provided in the entire width direction. The back waist elastic elastic members 17 are fixed in a state where they are stretched along the width direction at a predetermined stretch rate with an interval in the vertical direction. In addition, one or more of the back-side waist elastic elastic members 17 disposed in the region adjacent to the lower portion U of the back-side main body 13 may overlap the interior body 200. Alternatively, it may be provided on both sides in the width direction except for the central portion in the width direction that overlaps the interior body 200. The back waist elastic elastic member 17 has a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially 0.1 to the rubber thread of 1.0mm about ^2), 4 3 to 22 present approximately at intervals of ~ 12 mm, an extension ratio 150 to 400%, preferably fixed in particular about 220 to 320%. Further, it is not necessary for all of the back side waist elastic elastic members 17 to have the same thickness and extension rate. For example, the elastic waist members may have different thicknesses and extension rates at the upper and lower portions of the back waist part. Good.

Further, between the outer side surface of the inner sheet-like material 12 and the inner side surface of the outer sheet-like material 12 in the lower portion U of the back-side main body portion 13, except for the center portion in the width direction overlapping the interior body 200, A plurality of first elongate elastic elastic members 15 are vertically spaced along the width direction at a predetermined stretch rate so as to be continuous over the entire width direction at each of the upper and both sides in the width direction. It is fixed in the stretched state.

The first elongated elastic member 15 has a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1. It is preferable to fix thread rubber of about 1 to 15 mm ² ) at 1 to 15 mm, particularly 3 to 8 mm at an interval of about 5 to 30 and an elongation of about 200 to 350%, particularly about 240 to 300%.

In addition, between the outer side surface of the inner sheet-like material 12 and the inner side surface of the outer sheet-like material 12 in the back side extending portion 14, except for the center portion in the width direction that overlaps the interior body 200, The plurality of second elongated elastic elastic members 16 are spaced apart in the vertical direction so as to be continuous with each part over the entire width direction (at least over the entire buttock cover portion 14C), and at a predetermined expansion rate in the width direction. It is fixed in a stretched state.

The second elongated elastic elastic member 16 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1. It is preferable to fix the thread rubber of about 1.0 to 1.0 mm ^{2 at} 5 to 40 mm, particularly about 2 to 10 at intervals of 5 to 20 mm, respectively, with an elongation of 150 to 300%, particularly 180 to 260%.

On the other hand, the abdominal exterior sheet 12F is composed of only the abdominal body part basically the same as the back body part 13 of the back exterior sheet 12B (the part occupying the same vertical range as the side seal part by the welded part 12A group). It is a rectangular shape extending along the waistline direction, and does not have the back-side extending portion 14 like the back-side exterior sheet 12B.

That is, among the upper end portion (waist portion) W and the lower portion U of the abdominal exterior sheet (abdominal body portion) 12F, the inner side surface of the inner sheet material 12 and the folded portion of the outer sheet material 12 at the upper end portion W. A plurality of ventral waist elastic elastic members 18 are spaced in the vertical direction so as to be continuous over the entire width direction between the outer surface of 12r and extend along the width direction at a predetermined expansion rate. It is fixed in the state. The ventral waist elastic elastic member 18 is preferably as close as possible to the back waist elastic elastic member 17 in terms of number, thickness, stretch rate, spacing, and vertical arrangement, but may be different. When differentiating, the difference in number is 10 or less, preferably 5 or less, the difference in thickness is 1880 dtex or less, preferably 470 dtex or less, the difference in elongation is 100% or less, preferably 40% or less, the difference in spacing Is 10 mm or less, preferably 5 mm or less.

Further, a center in the width direction that overlaps the interior body 200 between the outer surface of the inner sheet-like material 12 and the inner side surface of the outer sheet-like material 12 in the lower portion U of the ventral-side exterior sheet 12F (abdominal-side main body). A plurality of third elongate elastic elastic members 19 are vertically spaced apart from each other on the upper side and both sides in the width direction except for the portion, and have a predetermined stretch rate. It is fixed in a stretched state along the width direction. Although the vertical disposition range of the third elongated elastic elastic member 19 may be a part of the lower portion, it is preferable that the third elongated elastic elastic member 19 is substantially the whole (a range in which the expansion / contraction force acts on the whole).

The third elongated elastic elastic member 19 is preferably as close as possible to the first elongated elastic elastic member 15 in terms of number, thickness, stretch rate, spacing, and vertical arrangement, but may be different. When differentiating, the difference in number is 10 or less, preferably 5 or less, the difference in thickness is 1880 dtex or less, preferably 470 dtex or less, the difference in elongation is 100% or less, preferably 40% or less, the difference in spacing Is 10 mm or less, preferably 5 mm or less.

The abdominal side exterior sheet 12F in the illustrated form is composed of only a portion that occupies the same vertical range as the welded portion 12A, but, similarly to the back side, a ventral body portion that occupies the same vertical range as the welded portion 12A and In addition, a configuration including an abdominal-side extension portion extending below the abdominal-side main body portion may be employed. Thereby, the leg periphery shape of the abdominal exterior sheet | seat 12F can be made into the shape fitted along a buttock. In this case, the area of the abdominal extension is preferably 10 to 80%, more preferably 20 to 50% of the area of the dorsal extension. If the ventral extension is excessively large, the fit is rather impaired, which is not preferable.

On the other hand, as shown in the figure, the first, second and third elongated elastic

elastic members

15, 16 and 19 are provided on both sides in the width direction except for the width direction central portion overlapping the interior body 200. However, it is preferable because the inner body 200 and the

outer sheets

12F and 12B are difficult to peel off. In this form, in addition to the form in which elastic elastic members are present only on both sides in the width direction, one side in the width direction across the inner body 200 There is an elastic stretch member from one side to the other side, but the elastic stretch member is cut at the central portion in the width direction overlapping with the interior body 200, and the stretch force does not act (substantially no elastic stretch member is provided) (Equal) is also included. Also, a part of the first, second and third elongated elastic

elastic members

15, 16 and 19, or the elastic force acts over the entire width direction of the back side main body part 13 and the back side extension part 14. The whole can be provided across the interior body 200 from one side in the width direction to the other side.

(Interior body)
The interior body 200 can take any shape, but is rectangular in the illustrated form. As shown in FIG. 3, the inner body 200 includes a surface sheet 30 on the body side, a liquid-impermeable sheet 11, and an absorbent element 50 interposed therebetween. On the back side of the liquid-impermeable sheet 11, a crotch portion is provided so as to cover the entire back surface of the interior body 200 or to cover the entire portion exposed between the abdominal exterior sheet 12F and the back exterior sheet 12B. The exterior sheet 12M can also be fixed. In addition, an intermediate sheet (second sheet) that quickly transfers the liquid that has permeated the surface sheet 30 to the absorbent element 50 can be provided between the surface sheet 30 and the absorbent element 50, but heat transfer to the skin is inhibited. Therefore, it is preferable that no other member is provided between the top sheet 30 and the absorbent element 50 at least in a portion overlapping with a pocket portion 57 described later, preferably over the entire portion. Furthermore, in order to prevent excrement from leaking on both sides of the interior body 200, barrier cuffs 60 and 61 standing on the body side can be provided on both sides of the interior body 200. Although not shown, the constituent members of the interior body 200 can be appropriately fixed to each other by solid, bead or spiral application such as hot melt adhesive. The interior body 200 can also be detachably attached to the

exterior sheets

12F and 12B using a mechanical fastener or an adhesive material.

(Surface sheet)
The top sheet 30 has a property of transmitting liquid, and examples thereof include a porous or non-porous nonwoven fabric, a porous plastic sheet, and the like. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, an SMS method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. In particular, a nonwoven fabric processed by the spunbond method or the SMS method is suitable in terms of excellent balance between thinness and strength in order to make it easy to detect temperature changes from the surface side, and a nonwoven fabric processed by the air-through method is low. Even the basis weight is suitable because it absorbs quickly and has a smooth feeling.

The top sheet 30 may be composed of a single sheet or a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of a single sheet or a laminate of two or more sheets in the planar direction.

When the top sheet 30 is composed of a nonwoven fabric, the thickness is about 0.1 to 3 mm, particularly 0.5 mm or less, and the basis weight is about 10 to 40 g / m ² , especially 25 g / m ² or less. It is preferable because it has excellent heat conductivity from the back side to the skin.

When the barrier cuffs 60 and 61 are provided, both side portions of the surface sheet 30 pass between the liquid-impermeable sheet 11 and the barrier cuffs 60 and 61 to the back side of the absorbent element 50 to prevent liquid penetration. Therefore, it is preferable to adhere to the liquid-impermeable sheet 11 and the barrier cuffs 60 and 61 with a hot melt adhesive or the like. Thereby, the effect that the rigidity of the both sides of the interior body 200 is improved is also obtained.

(Second seat)
As described above, the second sheet 44 (see FIG. 20C) having a higher liquid permeation rate than the top sheet 30 can be provided in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorber. This second sheet 44 not only quickly transfers the liquid to the absorbent body and enhances the absorption performance by the absorbent body, but also prevents the “reversed” phenomenon of the absorbed liquid from the absorbent body, and the top sheet 30 is always dried. It can be made into the state which carried out. The second sheet 44 can be omitted.

Examples of the second sheet 44 include the same material as the top sheet 30, spunlace, spunbond, SMS, pulp nonwoven fabric, a mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, an air-through nonwoven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably 20 ~ 80g / m ^2, more preferably 25 ~ 60g / m ^2. The thickness of the raw fiber of the nonwoven fabric is preferably 2.2 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use an eccentric fiber, a hollow fiber, or an eccentric and hollow fiber that does not have a core at the center as the mixed fiber of all or part of the raw fiber.

The second sheet 44 may be provided over the entire width in addition to being arranged in the center shorter than the width of the absorber 56. The length of the second sheet 44 in the longitudinal direction may be the same as the length of the absorbent body 56 or may be within a short length range centered on the region that receives the liquid.

(Liquid impervious sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited. For example, the liquid-impermeable sheet 11 is substantially made of an olefin-based resin such as polyethylene or polypropylene, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet, or a waterproof film. Non-woven fabrics that ensure liquid impermeability (in this case, a liquid-impermeable sheet is composed of a waterproof film and a non-woven fabric). Of course, in addition to this, materials having liquid impermeability and moisture permeability, which have been used and used in recent years from the viewpoint of preventing stuffiness, can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction. Examples of the microporous sheet obtained in this way can be given. In addition, non-woven fabric using micro-denier fiber, strengthening leak-proofing by reducing the voids of the fiber by applying heat or pressure, and applying water-absorbing resin or hydrophobic resin or water repellent. A sheet that is liquid-impermeable without using a film can also be used as the liquid-impermeable sheet 11.

The liquid-impermeable sheet 11 is preferably extended to both sides of the side surface 30 of the absorbent element 50 by wrapping around both sides of the absorbent element 50 in order to improve leakage prevention. Thereby, the effect that the rigidity of the both sides of the interior body 200 is improved is also obtained. The width of this extended portion is suitably about 5 to 20 mm on the left and right.

Further, the inner surface or the outer surface of the liquid-impermeable sheet 11 may be designed by printing or coloring. Further, a printed or colored design sheet, which is a separate member from the crotch outer sheet 12M, may be attached to the outside of the liquid-impermeable sheet 11. Further, an excretion indicator 80 whose color changes by contact with moisture can be provided inside the liquid-impermeable sheet 11. The excretion indicator 80 is preferably provided between the liquid-impermeable sheet 11 and the absorber 56, and is preferably provided over 30% or more, particularly 60% or more of the entire length of the absorber 56, and at least the width of the absorber 56. It is preferable to be provided along the center of the direction. When the absorbent body 56 is wrapped by a packaging sheet 58 described later, the excretion indicator 80 may be provided on either the absorbent body 56 side or the liquid-impermeable sheet 11 side of the packaging sheet 58. Further, another member provided with the excretion indicator 80 may be disposed between the liquid-impermeable sheet 11 and the absorber 56. It is preferable that the excretion indicator 80 is provided so as to overlap with a pocket portion 57 of the absorber 56 described later, because discoloration is good even with a small amount of body fluid. In this case, 30% or more, particularly 50% or more of the excretion indicator 80 is preferably overlapped with the pocket portion 57, and the pocket portion 57 is provided so as to penetrate the absorbent body 56 in the vertical direction (the packaging sheet 58 exists). May also be preferred.

(Barrier cuffs)
The barrier cuffs 60 and 61 are belt-like members extending along the both sides of the interior body 200 over the entire front-rear direction, blocking urine and soft stool that travel along the top sheet 30 in the lateral direction and prevent side leakage. It is provided to prevent this.

In this embodiment, as shown in FIGS. 3 and 4, barrier cuffs 60 and 61 are provided double on the left and right sides of the interior body 200. In the state where the diaper is unfolded, as shown in the figure, the inner barrier cuff 61 stands obliquely from the side of the interior body 200 toward the center in the width direction, and the outer barrier cuff 60 is in the width direction of the inner barrier cuff 61. The outer side portion is provided so as to stand upright from the side of the interior body 200, the base side portion stands obliquely toward the center in the width direction, and the tip side portion from the intermediate portion stands obliquely outward in the width direction. To do.

More specifically, the inner barrier cuff 61 folds the belt-like barrier sheet 62 having a length equal to the length in the front-rear direction of the interior body 200 in the width direction and folds it into two. Between them, a plurality of elongated elastic elastic members 63 are fixed along the longitudinal direction at intervals in the width direction. The elongated elastic elastic member 63 is not fixed to the barrier sheet 62 at the front and rear ends, and is fixed so that the barrier cuff extends and contracts in the middle part. The barrier sheet 62 is made of a spunbonded nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS, etc.), a melt-blown nonwoven fabric having excellent uniformity and concealment, and water repellent with silicon as necessary. A treated product can be suitably used, and the fiber basis weight is preferably about 10 to 30 g / m ² . As the elongated elastic elastic member 63, rubber thread or the like can be used. When spandex thread rubber is used, the thickness is preferably 420 to 1120 dtex, and more preferably 620 to 940 dtex. The elongation at the time of fixation is preferably 150 to 350%, more preferably 200 to 300%. Although not shown, a waterproof film can be interposed between the barrier sheets folded in two.

It is preferable to arrange one or two elongated elastic elastic members 63 at the distal end portion of the inner barrier cuff 61, and more preferably one or two at the intermediate portion between the distal end portion and the proximal end portion. When the elongated elastic elastic member 63 is present in the intermediate portion, it becomes easy to hit the skin against the surface in the range from the intermediate portion to the distal end portion using this as a fulcrum. The arrangement position of the elongated elastic elastic member 63 in the middle is preferably in the range of 30 to 70% of the height of the inner barrier cuff 61 (length in the width direction of the protruding portion). In the infant paper diaper, the height of the inner barrier cuff 61 is preferably about 15 to 35 mm. Therefore, the arrangement range of the elongated elastic stretch member 63 is preferably 5 to 25 mm from the distal end to the proximal end, and is 12 to 18 mm. Is more preferable. When the elongated elastic elastic members 63 are provided in parallel at the front end portion and / or the intermediate portion of the inner barrier cuff 61, the arrangement interval 61d is preferably 2 to 10 mm, and more preferably 2 to 6 mm.

The end of the inner barrier cuff 61 opposite to the folded portion in the width direction is an attachment portion (inner attachment portion) 65 fixed to the back surface of the side edge of the interior body 200. The portion is a protruding portion 66 (a portion on the folded portion side and corresponding to the inner protruding portion) protruding from the mounting portion 65, and both ends in the front-rear direction of the protruding portion 66 are hot melt adhesive on the surface of the surface sheet 30. And a front-rear fixing portion 67 by heat sealing, and a middle portion in the front-rear direction is an unfixed free portion (inner free portion), and an elongated elastic member 63 along the front-rear direction is fixed to the free portion in an extended state. Yes.

The outer barrier cuff 60 also has basically the same structure as the inner barrier cuff 61, but its attachment portion (outer attachment portion) 68 is an attachment portion 65 of the inner barrier cuff 61 on the back side of the interior body 200. Further, both ends in the front-rear direction of the projecting portion (outer projecting portion) 69 pass from the mounting portion 68 to the side of the interior body 200, and are fixed to the outer surface of the inner barrier cuff 61 on the center side in the width direction. 61, a base side portion that extends to the surfaces of both end portions in the front-rear direction of the inner projecting portion 66 and is fixed to the surfaces of both end portions in the front-rear direction of the inner projecting portion 66, and is folded back outward in the width direction from the tip of the base side portion. In addition, the point differs from the front end side portion fixed to the base side portion, the arrangement and number of the elongated elastic elastic members 63, and the like.

However, the inner barrier cuff 61 also has a structure in which the tip of the inner protruding portion is folded outward in the width direction, specifically, not more than 1/2 of the height of the inner barrier cuff 61 (width direction length of the protruding portion), If it is preferably 1/3 or less, a structure in which the tip side portion is folded back in the width direction and fixed to the base portion side portion similarly to the outer barrier cuff 61 may be adopted.

The number of the elongated elastic elastic members 63 provided in the free part (outer free part) of the outer barrier cuff 60 is preferably 2-6, and more preferably 3-5. The arrangement interval 60d is suitably 3 to 10 mm. If comprised in this way, in the range which has arrange | positioned the elongate elastic expansion-contraction member 63, it will become easy to contact | abut with respect to skin. The elongated elastic elastic member 63 may be disposed not only at the distal end side but also at the base side. The elongated elastic elastic member 63 disposed on the outer barrier cuff 60 has the same thickness and elongation rate as the inner barrier cuff 61, but the thickness is the same as or larger than that of the inner barrier cuff 61, and the elongation rate is the inner barrier cuff 61. The same or lower than that of 61 is preferred.

Further, the front-rear direction length L6 of the front-rear fixing portion 67 of the protruding

portions

66, 69 is preferably formed so that the inner barrier cuff 61 is the same as or shorter than the outer barrier cuff 60, and is elongated in the barrier cuffs 60, 61. The length of the elastic stretch member 63 in the front-rear direction is preferably formed so that the inner barrier cuff 61 is the same as or longer than the outer barrier cuff 60. The boundary between the attachment portion 65 and the protruding portion 66 may be the same position on the outer barrier cuff 60 and the inner barrier cuff 61, but the boundary of the outer barrier cuff 60 is the center in the width direction than the boundary of the inner barrier cuff 61. It is preferable to be spaced apart to the side, and the distance is preferably within 10 mm.

It is preferable to form a linear root fixing part by hot melt adhesive or heat sealing at the edge part of the protruding

parts

66 and 69 side of the attaching

parts

68 and 65 of the outer barrier cuff 60 and the inner barrier cuff 61. The other fixing parts can be fixed in an appropriate pattern using a hot melt adhesive or the like. The linear root fixing portion is located in the vicinity of the side portion on the front surface side of the interior body 200 (specifically, the position from 0 to 5 mm in the width direction from the side edge, preferably 0 to 3 mm) or the back surface side. preferable. In this case, since the barrier cuff is folded and fixed to the surface side substantially only at both ends in the front-rear direction, in the crotch part where the restriction to the center in the width direction by the front-rear fixing part 67 does not sufficiently act. The outer barrier cuff 60 and the inner barrier cuff 61 both stand up outward in the width direction, and the pocket formed by the inner barrier cuff 61 becomes wider. When the linear root fixing part is positioned over 5 mm in the width direction from the side edge on the surface side, the barrier cuff rises toward the center in the width direction also in the crotch part, and the pocket formed by the inner barrier cuff 61 is narrow Therefore, it is not preferable. In the case of being located on the back side, a position of 0 to 20 mm from the side edge of the interior body 200 is appropriate, but it may be located beyond 20 mm.

The fixing target of the

attachment portions

68 and 65 of the outer and inner barrier cuffs 60 and 61 can be an appropriate member such as the surface sheet 30, the liquid-impermeable sheet 11, and the absorbent element 50 in the interior body 200. The other barrier cuff can be fixed to the interior body 200 via the one barrier cuff.

In the outer and inner barrier cuffs 60 and 61 configured in this way, the contraction force of the elongated elastic elastic member 63 acts so as to bring the both ends in the front-rear direction closer, but the both ends in the front-rear direction among the protruding

parts

66 and 69 do not stand up. However, only the free part stands up against the body side as shown in FIG. 3. In particular, when the

attachment portions

68 and 65 are located on the back side of the interior body 200, the outer and inner barrier cuffs 60 and 61 stand up so as to open outward in the width direction at the crotch portion and the vicinity thereof. The barrier cuffs 60, 61 come into contact with the legs around the surface, and the fit is improved. On the other hand, on both the front and rear sides (abdomen and back) of the crotch part, the inner and rear barrier cuffs 61 are restricted by the front and rear fixing part 67 so that the outer and inner barrier cuffs 60 and 61 do not open outward in the width direction. In addition, since the lower half of the outer barrier cuff 60 is also erected in the same manner, it is possible to surely prevent the abdomen and the back from leaking from both sides of the interior body 200. Further, the front and rear fixing portions 67 of the protruding portion 66 of the inner barrier cuff 61 are not folded back, and the front and rear fixing portions 67 of the protruding portion 68 of the outer barrier cuff 60 are folded outward. , 61 is maintained between the inner and outer free parts, and the outer and inner barrier cuffs 60, 61 are securely raised at a wide interval, and each fits around the leg, providing excellent leakage prevention. It will be.

Although the dimensions of the barrier cuffs 60 and 61 can be determined as appropriate, in the case of an infant paper diaper, for example, as shown in FIG. 7, the standing height of the inner barrier cuff 61 (the length in the width direction of the protruding portion 66 in the unfolded state). ) W5 is preferably 10 to 50 mm, particularly preferably 15 to 35 mm, and the standing height of the outer barrier cuff 60 (length in the width direction of the protruding portion 69 in the unfolded state) W6 is 15 to 60 mm, particularly 20 to 40 mm. Is preferred. Further, the separation distance W4 between the tips in a state where the inner barrier cuff 61 is tilted to the surface of the top sheet 30 is preferably 60 to 170 mm, particularly 70 to 120 mm. In addition, when the outer barrier cuff 60 is folded flat so as to be parallel to the surface of the top sheet 30, the distance W3 between the innermost folds is preferably 60 to 190 mm, particularly 70 to 140 mm.
Unlike the illustrated embodiment, only one of the outer and inner barrier cuffs 60 and 61 can be provided.

(Absorption element)
Although the absorption element 50 of this example has the absorber 56 and the packaging sheet 58 which wraps this absorber 56 whole, the packaging sheet 58 can also be abbreviate | omitted.

(Absorber)
The absorber 56 can be formed of an aggregate of fibers. The fiber assembly preferably has hydrophilicity, and a tow (fiber bundle) of synthetic fibers such as cellulose acetate is opened as needed in addition to those obtained by stacking short fibers such as cotton pulp and synthetic fibers. Filament aggregates obtained by fibering can also be used. The fiber basis weight can be, for example, about 120 to 200 g / m ² when stacking cotton-like pulp or short fibers, and about 30 to 120 g / m ² for filament aggregates, for example. Can do. The fineness in the case of synthetic fibers is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The crimped degree of the crimped fiber can be, for example, about 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. Further, a crimped fiber that is uniformly crimped is often used.

The absorber 56 extends 30 to 48% of the total length L5 of the article from the center CL in the front-rear direction and 25 to 45% of the total length L5 of the article on the rear side. The absorber 56 may be rectangular, but as shown in FIG. 6, the front end portion 56F, the rear end portion 56B, and a constricted portion having a narrower width than those of the front end portion 56F and the rear end portion 56B. It is preferable to form an hourglass shape having 56N because the fit of the absorber 56 itself and the barrier cuffs 60, 61 around the legs is improved. As specific dimensions, the length in the front-rear direction of the absorber front end portion 56F is L1, the length in the front-rear direction at the overlapping portion between the absorber 56 and the ventral exterior sheet 12F is L2, and the length of the absorber rear end portion 56B is The length in the direction is L3, the length in the front-rear direction at the overlapping portion of the absorber 56 and the backside exterior sheet 12B is L4, the minimum width of the constricted portion 56N is W1, the width of the absorber front end portion 56F and the rear of the absorber When the width of the end portion 56B is W2, it is preferable that the end portion 56B is configured to satisfy the following expressions (1) to (4).
70 mm ≦ W1 <W2 ≦ 190 mm (1)
0.5 ≦ W1 / W2 ≦ 0.85 (2)
0mm ≤ L1-L2 ≤ 70mm (3)
0mm ≤ L3-L4 ≤ 50mm (4)

If W1 and W2 are too narrow, the standing of the barrier cuffs 60 and 61 becomes unstable, and the amount of absorption becomes insufficient. If it is too wide, the fit feeling deteriorates due to a decrease in fit.
In addition, when the value is within the above numerical range, the absorber 56 does not exist in the vicinity of the attachment portion 65 of the barrier cuffs 60, 61 in the crotch portion. Therefore, the degree of freedom of movement of the barrier cuffs 60, 61 increases, and the barrier cuffs 60, 61 Is easy to open outward in the width direction, and it is easy to hit the skin with the surface, and the followability of the fit surface to the movement of the leg is improved. Since the absorber 56 on the side of the interior body 200 exists in a sufficient range on both the front and rear sides, the standing of the barrier cuffs 60 and 61 is stabilized with this as a base point (fulcrum). A portion extending from the front and rear sides to the crotch portion is a displacement portion in which the barrier cuffs 60 and 61 are opened outward from the posture in which the barrier cuffs 60 and 61 stand up inward in the width direction with reference to both side edges in the width direction. The posture change of 60, 61 is supported by the absorber 56 that exists up to the side of the interior body 200, and the overall standing shape of the barrier cuffs 60, 61 is stabilized. If the constricted part is too large outside the above numerical range, the degree of freedom of the barrier cuffs 60 and 61 becomes too high in the crotch part, and there is a possibility that a gap is easily formed around the leg, and both the front and rear sides of the crotch part However, since there is no base point (fulcrum), the standing of the barrier cuffs 60 and 61 may become unstable. Conversely, if the constricted portion becomes too small, the degree of freedom of the barrier cuffs 60 and 61 is lowered, which is not preferable.

Furthermore, the front-rear direction length L7 of the entire constricted portion 56N is preferably 80 mm or more, and particularly preferably 120 to 260 mm. If the length L7 in the front-rear direction of the constricted portion 56N is too short, the degree of freedom of the barrier cuffs 60 and 61 is lowered, and the fit of the absorbent body 56 around the legs is lowered to prevent the movement of the legs, which is too long. And the standing of the barrier cuffs 60 and 61 becomes unstable.

(Superabsorbent polymer particles)
It is preferable to disperse and hold superabsorbent polymer particles throughout the absorber 56. Superabsorbent polymer particles include “powder” in addition to “particles”. As the particle diameter of the superabsorbent polymer particles, those used in this type of absorbent article can be used as they are, and those having a particle size of 1000 μm or less, particularly 150 to 400 μm are desirable. The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. Superabsorbent polymer particles include starch, cellulose and synthetic polymers, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and sodium carboxymethylcellulose cross-link. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.

As the superabsorbent polymer, one integrated with an antibacterial substance can be used. In particular, zeolite particles obtained by substituting some or all of the ion-exchangeable ions in the zeolite with silver ions (hereinafter referred to as antibacterial deodorant zeolite) are contained in the superabsorbent polymer or antibacterial. Antibacterial deodorant superabsorbent polymer particles obtained by adhering deodorant zeolite particles to the surface of superabsorbent polymer particles by static electricity are suitable.

As the superabsorbent polymer particles, those having a water absorption rate of 40 seconds or less are preferably used. When the water absorption speed exceeds 40 seconds, so-called reversion in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.

Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even if it is a case where it is set as the bulky absorber 56, the sticky feeling after liquid absorption can be suppressed effectively. Furthermore, as the superabsorbent polymer, those having a water absorption speed of 50 seconds or less are suitable.

The content of the superabsorbent polymer particles is preferably about 100 to 400 g / m ² , and particularly within the range of 170 to 220 g / m ² , the content of the superabsorbent polymer is higher than the content of hydrophilic fibers. More specifically, it is preferable that the superabsorbent polymer is set to 1.1 to 2.0, particularly about 1.4 to 1.6 with respect to the fiber assembly 1 by weight comparison. If the polymer content is less than 170 g / m ² , it can be used only for training purposes, but if the wearer urinates multiple times without being aware of excretion (urination), the amount of absorption may be insufficient. In some cases, if it exceeds 220 g / m ² , a crisp feel is easily transmitted to the wearer, and the wearer during toilet training is strongly conscious of using a diaper.

If necessary, the superabsorbent polymer particles can adjust the spray density or spray amount in the plane direction of the absorber 56. For example, it is possible to increase the application amount of the liquid excretion site as compared to other sites. When gender differences are taken into account, men can increase the front spray density (amount), while women can increase the center spray density (amount). In addition, a portion where no polymer exists locally (for example, in a spot shape) in the planar direction of the absorber 56 can also be provided. Or when providing the pocket part 57 mentioned later in the absorber 56, the superabsorbent polymer is arrange | positioned around the pocket part 57 most densely compared with the other area | region of the said absorber. You can also Specifically, it is preferable that the superabsorbent polymer is about 1.4 to 2.2 with respect to the fiber assembly 1 by weight comparison. Further, the superabsorbent polymer may be arranged at a high density only in the vicinity of the front end portion of the pocket portion 57.

(Packaging sheet)
When the packaging sheet 58 is used, as the material, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the sheet is a fine sheet from which the superabsorbent polymer particles do not come out, and a thin sheet having a low weight is appropriate for facilitating the sensing of temperature changes from the surface side. A thickness of about 0.05 to 3 mm, particularly 0.2 mm or less, and a basis weight of about 5 to 25 g / m ² , particularly 15 g / m ² or less are preferred because of excellent heat transfer from the back side to the skin. In the case of using a nonwoven fabric, a nonwoven fabric processed by the spunbond method or the SMS method, particularly a nonwoven fabric processed by the SMS method is preferable in terms of excellent balance between thinness and strength, and the material is polypropylene, polyethylene / polypropylene, etc. Can be used.

In addition, when the joint of the packaging sheet 58 is provided on the surface (wearer surface) side of the absorbent element 50 as illustrated, in order to make the wearer sense a temperature change effectively, the overlap width 58W of the joint is It is preferable that the arrangement region of the temperature change substance 40 is narrower than the width 40W and has a dimension of 40 mm or less, particularly 20 mm or less. Even if it is made narrow like this, the superabsorbent polymer particles will not escape for the above reasons. The seam of the packaging sheet 58 is also preferably formed near the side so as not to include the center in the width direction in contact with the urination port. In particular, it is preferable that the overlapping portion of the joint sheet of the packaging sheet 58 on the body side does not overlap with a portion having a temperature change substance described later.

(Crotch exterior sheet)
A crotch outer sheet 12M exposed on the outer surface of the product is provided on the back side of the inner body 200. As the material of the crotch outer sheet 12M, the same material as the abdominal outer sheet 12F and the back outer sheet 12B can be used, but a material containing a higher-strength material or a deodorant, etc. A material different from the exterior sheet 12F and the back-side exterior sheet 12B may be used. Specifically, various nonwoven fabrics such as spunbond nonwoven fabric, melt blown nonwoven fabric, point bond nonwoven fabric, air-through nonwoven fabric, air point nonwoven fabric, spunlace nonwoven fabric, SMS nonwoven fabric, and the like made of fibers of PP, PP / PE, PP / PET, or the like, or What added the deodorizer etc. to this can be used.

A high body pressure is applied to the crotch outer sheet 12M when sitting. Therefore, a material having a high friction fastness (not fuzzy) is preferable.
The crotch outer sheet 12M may be a sheet provided with design elements by printing or coloring. When used in combination with the above-described design sheet, it is preferable to dispose the designs so that they do not overlap.
It is preferable to use a stretchable nonwoven fabric as the crotch outer sheet 12M and to extend and paste in the longitudinal direction of the inner body 200 because the fit of the crotch part is improved.

When the crotch outer sheet 12M wraps around from the side in the width direction to the side of the body and is bonded and fixed to the outer surface of the barrier sheet 62 with a hot melt adhesive or the like, the rigidity of both sides of the interior body 200 is improved. In such a form, it is preferable to use a sheet having high rigidity (roughness) as the crotch outer sheet 12M. Specifically, a sheet having a bending resistance measured by the Clark method (JISL1096 C method) and the sum of the MD direction and the CD direction of the sheet of 100 mm or more, preferably 150 mm or more may be used.

In the illustrated example, the crotch outer sheet 12M is sandwiched between the inner body 200 and the abdominal and

dorsal exterior sheets

12F and 12B where the abdomen and

dorsal exterior sheets

12F and 12B overlap the interior body 200. However, it is also possible to affix them to the outside of the ventral and

backside exterior sheets

12F and 12B. The crotch outer sheet 12M is affixed to the back surface of the inner body 200 and the inner or outer surfaces of the abdominal and back-side

outer sheets

12F and 12B with a hot melt adhesive or the like.

(Temperature change material)
The absorbent body 56 is formed with a pocket portion 57 so as to include a portion of 20% of the overall length L6 of the article on the front side from the center CL in the longitudinal direction of the article. A temperature change material 40 for cooling or heating is arranged. The distance between the front end portion of the pocket portion 57 and the front end portion of the absorbent body 56 may be 5 to 30% of the total length L6 of the article, but is preferably 10 to 20%. The pocket portion 57 may have a thickness of 0 to 50% with respect to the average value of the thickness of the surrounding area, but is more preferably formed so as to penetrate the absorber 56 in the front and back direction. When the pocket part 57 penetrates the absorber 56 in the front and back direction, the pocket volume for holding the temperature change substance 40 is increased, and the temperature change is efficiently transmitted to the wearer's body.

More specifically, the pocket portion 57 in the illustrated example is within the range of 0 to 40% of the article total length L6 from the center in the longitudinal direction of the article to the front side, and the longitudinal length 57L is 10 to 20% of the article full length L6. In addition, the width 57W is provided to be 25 to 60% of the entire width W2 of the absorber 56. It is preferable that the temperature change substance 40 is provided only in the pocket portion 57 of the absorber 56 as shown in the illustrated example from the viewpoint of not impairing the diffusibility of urine and cost-effectiveness. Can also be provided. Moreover, the shape of the pocket part 57 can be set to an appropriate shape such as a triangular shape, a circular shape, or an elliptical shape in addition to a rectangular shape as shown in the illustrated example. Moreover, in the underpants type disposable diaper like this embodiment, the front-back direction range in which the pocket part 57 is provided like FIG. 6 is the side seal part (welding part 12A) of the right and left both sides of the abdominal exterior sheet 12F. Arranging so as to include a line connecting the lower end portions is preferable because a temperature change is effectively brought about in a region that is appropriately separated from the urination port and is in close contact with the abdomen portion of the wearer. However, in order to prevent urine leakage from the ventral end of the absorbent body 56, the distance between the front end of the pocket portion 57 and the front end of the absorbent body 56 is preferably 20 mm or more.

The temperature change material 40 is preferably provided uniformly throughout the pocket portion 57, but the amount may vary depending on the site.

The temperature change substance 40 is in contact with urine and absorbs or releases heat by heat of dissolution, heat of hydration, heat of reaction, etc., and cools or heats urine. Examples of the temperature change substance 40 that absorbs heat by dissolution in urine include hydrated salts such as sodium acetate, sodium carbonate, sodium sulfate, sodium thiosulfate, and sodium phosphate, ammonium nitrate, potassium nitrate, ammonium chloride, potassium chloride, nitric acid Examples thereof include anhydrous salts such as sodium, sugar alcohols such as urea, xylitol and sorbitol. Examples of the temperature change substance 40 that releases heat when dissolved in urine include aluminum chloride, aluminum sulfide, aluminum potassium sulfide, and the like. In the present invention, among these, it is preferable to use sugar alcohols such as sorbitol and xylitol that exhibit an endothermic effect, or organic compounds such as urea. In particular, sorbitol and xylitol can be suitably used because they are extremely excellent in solubility, have good chemical stability, and do not adversely affect the human body. When using a substance that absorbs heat or dissipates heat by dissolving in urine, if the solubility in urine is low, sufficient temperature change cannot be exhibited, so the solubility in 100 ml of water at a temperature of 20 ° C. is 30 g or more, particularly 50 g or more. Those are preferred. Moreover, what produces the calorie | heat amount change of 20 cal / g or more is preferable, and what produces the calorie | heat amount change of 35 cal / g or more is more preferable. Moreover, it is preferable that the calorie | heat amount change per unit area is 1 cal / cm < ² > or more.

Examples of substances that absorb or release heat by reaction with urine include orthoesters, or Menton ketal obtained by reacting menthone with alcohols having 1 to 8 carbon atoms or polyols having 2 to 8 carbon atoms. Ketals and their structural or optical isomers. Examples of the temperature change substance 40 that absorbs or releases heat by swelling with urine include polyacrylic acid that is lightly cross-linked and partially neutralized.
The temperature change substance 40 is preferably in the form of particles (including powder), but other shapes such as fibers can also be used.

Further, in the form in which the excretion indicator 80 overlaps with the pocket part 57 as described above, in particular in the form in which the excretion indicator 80 overlaps with the pocket part 57 provided so as to penetrate the absorber 56 in the vertical direction, the moisture in the air during storage Due to contact with (humidity) or contact with moisture from the wearer's sweat or body in use, the excretion indicator may be discolored even though it is not excreted. However, the temperature-changing substance 40 is a hygroscopic substance, for example, a substance having a high water solubility and a large surface area as described above (particularly, particulate sorbitol or xylitol is preferable). And the above-mentioned unexpected discoloration of the excretion indicator can be prevented.

In the diaper thus configured, after passing through the surface sheet 30 during urination and the urine absorbed by the absorbent body 56 has sufficiently moved to the front side by the diffusion action, it contacts the temperature change substance 40 in the pocket portion 57. Thereby, a temperature change occurs in the pocket portion 57 and the temperature change is transmitted to the abdomen portion of the wearer without passing through the absorber 56. Thus, if the urine after sufficiently diffusing and moving has a structure that contributes to the temperature change, the phenomenon that the temperature change generated by the urine supplied earlier is weakened or canceled by the temperature of the urine supplied later. The temperature change corresponding to the usage amount of the temperature change substance 40 can be suppressed. Moreover, since the sufficient temperature change occurs in the pocket portion (front and back through portion) 57, it is difficult to be insulated and is efficiently transmitted to the body. Furthermore, in the case of the illustrated form, the pocket portion 57 having a sufficiently large size is located substantially in the wearer's abdomen or lower abdomen, and the wearer's abdomen or lower abdomen bulges relatively on the body surface. It is easy to approach the temperature change part in the pocket part 57, and the temperature change in the pocket part 57 is easily transmitted to the wearer.

As shown in FIG. 10, the pocket portion 57 containing the temperature change substance 40 is located on the rear side with respect to the article longitudinal direction center CL from the position of 25 to 45% of the article total length L6 on the front side with respect to the article longitudinal direction center CL. It is also preferable that the width is extended to the position of 20 to 40% of the total length L6 of the article along the center in the width direction of the article and 25 to 60% of the total width W2 of the absorbent body 56. In this embodiment, since the pocket portion 57 containing the temperature change substance 40 extends so as to include the urination position, there is an advantage that a sufficient temperature change can be generated even when the amount of urine is small or large. . Although the pocket portion 57 in the illustrated example is provided in a rectangular shape, it can be formed in an appropriate shape such as a triangular shape within the above size range. Others are basically the same as the above embodiment, and thus the description is omitted.

Further, as shown in FIG. 11, the pocket portion 57 containing the temperature change substance 40 is formed in an annular shape so as to surround the central region 55 of the absorber 56, and the line width 57B is about 5 to 10% of the total length L6 of the article. It is also preferable that In this case, the central region 55 extends along the center in the width direction of the article by 15 to 35% of the article total length L6 on the front side and 15 to 35% of the article full length L6 on the rear side from the article longitudinal center CL. The width is preferably 40 to 75% of the entire width W2 of the absorber 56. In this form, the urine absorbed by the absorber 56 can reach the pocket portion 57 including the temperature change substance 40 and come into contact with the temperature change substance 40 no matter which direction the urine diffuses from the excretion position. Therefore, more urine can be brought into contact with the temperature change substance 40 in the pocket part 57, or even if the diffusion direction of urine is biased, it can be brought into contact with the temperature change substance 40 in the pocket part 57 with certainty. Others are basically the same as the above embodiment, and thus the description is omitted.

The amount of the temperature change substance can be determined as appropriate, but when sugar alcohol is used as the temperature change substance, the total content in the article is about 4 to 20 g, particularly about 8 to 12 g for toilet training diapers. Is preferred. In addition, the basis weight (content per unit area) of the temperature change substance in the portion having the temperature change substance 40 is about 200 to 1200 g / m ² , and particularly about 400 to 600 g / m ^{2 in} the case of a toilet training diaper. Is preferred.

Here, in order for the wearer to clearly perceive urination, it is preferable that there is a temperature change of 4 degrees or more, particularly 5 degrees or more on the surface of the topsheet 30. Specifically, in each of the above-described embodiments, when there is no other member between the topsheet 30 and the absorbent element 50, in order to achieve such a temperature change, the following conditions are satisfied. It is preferable to do this.
The material of the liquid-permeable surface sheet 30: non-woven fabric.
The thickness of the liquid-permeable top sheet 30: 0.1 to 0.5 mm.
The basis weight of the liquid-permeable surface sheet 30 is 10 to 40 g / m ² .
The material of the packaging sheet 58: crepe paper or SMS nonwoven fabric.
The thickness of the packaging sheet 58: 0.05 to 0.2 mm.
The weight of the packaging sheet 58: 5 to 25 g / m ² .
Type of temperature change substance 40: A substance that causes an endothermic reaction when dissolved in urine and cools urine.
Solubility of temperature changing substance 40 (for 100 ml of water at a temperature of 20 ° C.): 30 g or more, in particular 50 g or more.
Total area of the pocket portion 57: 2500 to 8000 mm ² .
Temperature change substances basis weight in the pocket portion 57 (. Divided by the total area of the pocket portion the total amount of the temperature changing substance other the same.): 500 ~ 1000g / m 2.

<Temperature change experiment>
(Example 1)
A pants-type disposable diaper having the structure shown in FIGS. 1 to 10 was produced. Detailed specifications are as follows.
Liquid-permeable surface sheet 30: an air-through nonwoven fabric composed of PE / PP composite fibers having a thickness of 2 mm and a basis weight of 25 g / m ² .
Packaging sheet 58: crepe paper having a thickness of 1 mm and a basis weight of 15 g / m ² .
Dimensions of absorber 56: From a position of 205 mm on the front side to the position of 190 mm on the rear side with respect to the center in the front-rear direction and from a position of 70 mm on the left side to a position of 70 mm on the right side with respect to the center in the width direction. The area is 55,300 mm ² .
Type of temperature change substance 40: Sorbitol (The heat of dissolution is minus 26 cal / g, “Sorbit” manufactured by Towa Kasei Kogyo Co., Ltd.)
Solubility of temperature changing substance 40 (for 100 ml of water at a temperature of 20 ° C.): 70 g.
Dimensions of pocket part 57: The front end part is separated from the front end part of the absorber 56 by 75 mm in a rectangular range with a total length of 70 mm and a total width of 40 mm. The area is 2800 mm ² .
The basis weight of the temperature change substance 40 in the pocket part 57: 500 g / m ² .
Composition of absorber 56: Pulp fiber and superabsorbent polymer particles (dispersed uniformly in the thickness direction of absorber 56 and in the direction perpendicular thereto).
Pulp weight in the absorbent body 56: 110 g / m ² .
The basis weight of the superabsorbent polymer in the absorber 56: 160 g / m ² .
Absorption rate of superabsorbent polymer: 35 seconds.
(Example 2)
As shown in FIG. 13, a pants-type disposable diaper having a structure similar to that of Example 1 was prepared except that a predetermined amount of the temperature change substance 40 was sprayed in a predetermined range on the upper surface of the absorber 56. Detailed specifications are as follows.
Liquid-permeable surface sheet 30: an air-through nonwoven fabric composed of PE / PP composite fibers having a thickness of 2 mm and a basis weight of 25 g / m ² .
Packaging sheet 58: crepe paper having a thickness of 1 mm and a basis weight of 15 g / m ² .
Dimensions of absorber 56: From a position of 205 mm on the front side to the position of 190 mm on the rear side with respect to the center in the front-rear direction and from a position of 70 mm on the left side to a position of 70 mm on the right side with respect to the center in the width direction. The area is 55,300 mm ² .
Type of temperature change substance 40: Sorbitol (The heat of dissolution is minus 26 cal / g, “Sorbit” manufactured by Towa Kasei Kogyo Co., Ltd.)
Solubility of temperature changing substance 40 (for 100 ml of water at a temperature of 20 ° C.): 70 g.
Dimensions of the portion having the temperature change material 40: from the position of 160 mm on the front side to the position of 40 mm on the rear side with respect to the center in the front-rear direction and from the position of 50 mm on the left side to the position of 50 mm on the right side with respect to the center in the width direction Rectangular range of. The area is 20,000 mm ² .
The basis weight of the temperature change substance 40 in the portion having the temperature change substance 40: 500 g / m ² .
Composition of absorber 56: Pulp fiber and superabsorbent polymer particles (dispersed uniformly in the thickness direction of absorber 56 and in the direction perpendicular thereto).
Pulp weight in the absorbent body 56: 110 g / m ² .
The basis weight of the superabsorbent polymer in the absorber 56: 160 g / m ² .
Absorption rate of superabsorbent polymer: 35 seconds.
(Example 3)
A pants-type disposable diaper having the same configuration as in Example 1 except that the pocket portion 57 and the temperature change substance 40 are not provided in the absorbent body 56 was produced as Example 3.

(Experimental method and experimental results)
Prepare artificial urine with a temperature of 37 ° C and a volume of 50 cc in a beaker, and supply this artificial urine from the center of the diaper in the front-rear direction and the center in the width direction in about 3 seconds from the upper side in about 3 seconds, At a center position in the width direction (near the front end of the pocket portion 57) 70 mm away from the center to the front side of the entire article, a range of 5 cm in diameter was measured every predetermined time with a non-contact type thermometer.

The graph of the measurement results is shown in FIG. As can be seen from this graph, Example 1 according to the present invention has a faster temperature decrease rate and a lower minimum temperature than Example 2, and can maintain the minimum temperature for a sufficient time. there were.

<Other preferred forms>
When the particulate temperature change material 40 is used, the temperature change material 40 may be configured to move within the pocket portion 57 without being fixed. However, the particulate matter of the temperature change material 40 is free inside the diaper. Since the temperature change during urination may be insufficient, a means for preventing the temperature change substance 40 from moving can be taken. For example, the temperature change substance 40 can be fixed to a sheet (a packaging sheet 58 in the illustrated case) constituting the bottom of the pocket portion 57 by a fixing means such as an adhesive.

Further, the particulate temperature change substance 40 is heated and melted and solidified to be arranged in a solid state, and the temperature change substance 40 has a particulate matter in a state where it can freely move. It is also possible to have only a small amount or not to move the majority.

When manufacturing a member of this form, if there is a member heated together with the temperature change substance 40, it is desirable that the melting point of the temperature change substance 40 is lower than that of the member heated together with the temperature change substance 40. . That is, since disposable diapers usually contain a thermoplastic resin such as polyethylene or polypropylene, it is desirable that the temperature changing substance 40 has a melting point that is the same as or lower than those resins. Among general thermoplastic resins, polyethylene having a particularly low melting point usually has a melting point of about 100 to 130 ° C. Therefore, the melting point of the temperature changing substance is preferably 130 ° C. or less, and preferably 100 ° C. or less. More preferred. Moreover, it is preferable to have melting | fusing point of 70 degreeC or more so that the temperature change substance 40 may not melt | dissolve at the time of product storage. Examples of such a temperature change substance 40 include sorbitol and xylitol having a melting point of about 95 to 110 ° C. (varies depending on purity).

Moreover, since the temperature change material 40 is applied to the inside of the diaper in a state where it is heated and melted or to a member constituting the diaper, the member adjacent to the temperature change material 40 is particularly a nonwoven fabric or an absorbent body 56. In the case of a fiber assembly, if the temperature change substance 40 has a low viscosity at the time of melting, it is difficult to penetrate into the fiber gap and the adhesion may be reduced. Moreover, if the viscosity of the temperature change substance 40 at the time of melting is high, it is difficult to place the temperature change substance 40 at a predetermined site. From this viewpoint, the temperature changing substance 40 preferably has a viscosity of 5 to 80 poise at a melting temperature (for example, 70 to 130 ° C.).

In particular, a material obtained by heating and melting the temperature change material 40 is fused and fixed to a member adjacent to the periphery, so that the temperature change material 40 does not move, and the temperature change reliably occurs in the fusion region (for example, the crotch portion). The function comes to be demonstrated. Moreover, the fusion | bonding site | part of the temperature change substance 40 can also anticipate the effect as an adhesion part for adhering and fixing the upper and lower members.

The fusion site of the temperature change substance 40 is not particularly limited as long as it is a member adjacent to the periphery, but in the illustrated example, it can be at least one of the absorber 56 and the packaging sheet 58. When the temperature change substance 40 is to be fused, the fusion site is preferably the entire inside of the pocket portion 57, but can also be a part of the temperature change substance 40, when the temperature change substance 40 is contained outside the pocket portion 57. The temperature changing substance can be fused to the adjacent member.

As a method of fusing the temperature change substance 40 to the fusion target such as the absorber 56, the temperature change substance 40 having an appropriate shape such as a particle (including powder) or short fiber is formed on the upper surface of the fusion target member. After being placed on a predetermined part or contained in a predetermined part inside the fusion target member (including when sandwiched between a plurality of members), the temperature change substance 40 is heated together with the fusion target member, and the temperature change substance It is possible to use a method in which only the temperature 40 is melted and attached to the fibers of the member to be fused, and then cooled to solidify the temperature change substance 40 (first method). According to the first method, although depending on conditions such as the amount of the temperature change material 40 and the heating time, the temperature change material in the form of particles smaller than that before melting or a plurality of melted temperatures are obtained. The bulky temperature change material 40 in which the change materials are integrated is attached to many places, or these are continuously attached to the temperature change material 40 such as a film or a skeleton.

As another method, following the application of the hot melt adhesive used in the technical field of absorbent articles, a melt of the temperature change substance 40 is applied to a predetermined part of the member to be fused using a nozzle or the like. A method of cooling and solidifying can also be used (second method).

In the first method, when the temperature change substance 40 is contained in the fusion target member, the temperature change substance 40 such as particulates is mixed with the manufacturing raw material (fiber or the like) of the fusion target member. When the member has a gap extending from the outside to the inside like a fiber assembly, the particulate temperature change material 40 is applied to the fusion target member more vigorously than the free fall by giving an initial velocity. Accordingly, the temperature change substance 40 can be allowed to enter the fusion target member.

The heating means in the first method is not particularly limited, but for example, the means shown in FIGS. 16 to 19 can be employed. The means shown in FIGS. 16 and 17 utilize an air-through dryer that heats by passing high-temperature air. In the means shown in FIG. 16, after the fusion target member 300 in which the temperature change substance 40 is arranged at a predetermined portion is conveyed by the belt conveyor 301 and heated by hot air 302 that is passed in a direction orthogonal to the conveyance surface. In the same manner, cooling is performed by the wind 303 that is passed in a direction orthogonal to the conveying surface. 17 (a) and 17 (b) is a suction roll 311 in which a fusion target member 300 in which a temperature change substance 40 is arranged in a predetermined portion is installed in a heating chamber 310 to which high-temperature air is supplied. It is heated by hot air 312 passed from the outside to the inside of the suction roll 311 while being wound around and then cooled by being wound around and transferred to a cooling roll 313 installed outside the heating chamber 310. is there.

Further, the heating means shown in FIG. 18 wraps and transfers the fusion target member 300 in which the temperature change substance 40 is arranged in a predetermined portion around the heating roll 320, thereby bringing the heat of the heating roll 320 into contact with the temperature change substance. It heats from one side.

Furthermore, the heating means shown in FIG. 19 passes the fusion target member 300 in which the temperature change substance 40 is arranged in a predetermined portion between a pair of

rolls

330, 331, 340, 341, at least one of which is a heating roll, The heat of the heating roll is transmitted to the temperature change substance by contact and heated. In this case, as shown in FIG. 6A, both

rolls

330 and 331 are smooth rolls with smooth surfaces and no irregularities are formed on the fusion target member 300, as shown in FIG. Alternatively, any one of the rolls 340 may be an embossing roll having a predetermined pattern of unevenness on the surface, and the unevenness may be formed on one surface of the fusion target member 300. In particular, in the latter case, it is also preferable that the convex pattern of the embossing roll 340 is formed only in the region where the temperature change substance is fused, and only that region is heated. Since the fusion part is formed only in the region corresponding to the convex pattern of the embossing roll 340, the temperature change substance 40 may be arranged in a wider range than the convex pattern of the embossing roll 340. Thus, if the method of partially heating the fusion target member 300 is used, it is not necessary to arrange the temperature change substance 40 only in a predetermined region of the fusion target member 300. For example, the entire surface of the fusion target member 300 It is also possible to partially form the fused portion by disposing the temperature change substance 40 and heating only a predetermined region. Further, if the convex pattern of the embossing roll 340 has a plurality of heights, it is possible to separately form a portion where the temperature change material 40 is fused thickly and a portion where the temperature change material 40 is thinly fused.

The heating and melting of the temperature change material 40 in the first method is performed not only at the time of manufacturing the member to be fused, but also at an appropriate stage in the subsequent manufacturing process, for example, the assembly completion state of the interior body 200 (before assembly to the product state). Alternatively, after the assembly to the product state is completed, the inner body 200 and the entire diaper can be performed. As a heating method in this case, for example, the means shown in FIGS. 16 to 19 described above can be applied.

The surface-change material 40 fused to the member to be fused in the first method has a small surface area because it is once melted and liquefied and then solidified. Therefore, since the contact area with the urine in the temperature change substance 40 becomes small, the temperature change speed is suppressed and the sustainability is improved. However, if the rate of temperature change is uniformly reduced, the wearer may have difficulty perceiving the temperature change. Therefore, a particulate matter having a low bulk density is used as the temperature change substance 40, and not all of the particulate matter is melted, but a part thereof is melted to form a solid having a high bulk density, and the rest is left as a particulate matter having a low bulk density. It is also a preferable form to do (it does not need to be fused). If the particle-like temperature change substance 40 has the same particle size, the lower the bulk density, the larger the surface area and the higher the contact efficiency with urine, and thus the temperature change speed becomes faster. This tendency is particularly remarkable when the temperature change substance 40 is dissolved in urine to cause a temperature change. Therefore, as described above, when only a part of the temperature change substance 40 is melted, the temperature change substance 40 that maintains the particulate state has a quick temperature change action, and the melted and solidified temperature change substance 40 has a temperature change action. Therefore, a temperature change having both fast and slow effects can be obtained. In order to balance the rapid effect and slow effect of such a temperature change, the residual ratio of the particulate matter is suitably about 30 to 70% by weight. Further, from the viewpoint of preventing the movement of the temperature change substance 40, the remaining proportion of the particulate matter is suitably about 0 to 50% by weight. Therefore, the residual ratio of the particulate matter is preferably 30 to 50% by weight.

As the particulate temperature change substance 40 having a low bulk density, porous particles such as granules, particles having many surface irregularities, and particles having fine pores on the surface or inside thereof are suitable. The degree of the bulk density may be determined as appropriate, but is preferably 50% or less of the true density (having a void (space) of 50% or more with respect to the apparent volume). For example, in the case of sorbitol, the true density is so 1.50 g / cm ^3, preferably bulk density is 0.75 g / cm ³ or less, more preferably ^{0.50 ~ 0.70g / cm 3, 0.55} ~ 0 .65 g / cm ³ is particularly preferred. In addition, when the particle size is large, the apparent bulk density is small, but the surface area is not large. Therefore, when the particulate temperature change material 40 is used, the average particle size (JIS K 1474-2007 median diameter) is 200 to 600 μm. It is preferable that

According to the method described above, the temperature change substance 40 can be fused inside the diaper or to a member constituting the diaper, but only by this, the fused part becomes hard, the wearing feeling becomes hard, and the body fits. The nature is also reduced. Therefore, the following softening means are combined. In other words, the first means applies mechanical pressure to the portion including the fused portion of the temperature change material 40 to break the fused temperature change material 40. Such a treatment is preferable because a continuous treatment can be performed by pressing the member to be fused between the rolls. The pressurization may be accompanied by heating, but it is preferable to pressurize without heating because the temperature change substance is difficult to break.

The pressing process can be performed on the entire target part, or partially, for example, in the form of dots by so-called embossing. FIG. 14 shows the latter pressurization form, where reference numeral 45 indicates a pressurizing part and reference numeral 46 indicates a non-pressurizing part. In the case of the latter pressurizing form, the center interval 45d of the pressurizing part 45 is preferably in the range of 2 to 25 mm in both the front-rear direction and the width direction. Further, the area ratio of the non-pressurized portion 46 per unit area in the portion having the pressurizing portion 45 and the non-pressurized portion 46 is preferably about 20 to 70%, particularly about 30 to 50%. If the interval between the pressurizing parts 45 is too wide or the area of the non-pressurizing part 46 is too large, the flexibility tends to be insufficient, the interval between the pressurizing parts 45 is too narrow, or the area of the non-pressurizing part 46 is too small. If it is too small, it becomes almost the same as crushing the entire fusion part, and the amount of the temperature change substance 40 that is detached from the fusion target member during crushing increases. Further, the arrangement of the pressurizing portions 45 can be determined as appropriate, and can be a staggered pattern as shown in FIG. 14B in addition to a matrix as shown in FIG. A part of the temperature change material 40 crushed and subdivided by the pressurization is released from the fused member and can move freely inside the diaper. It is preferable that the amount of free substances (particulate matter) is small, specifically, about 0 to 30% by weight, particularly 0 to 10% by weight, based on the whole temperature change substance 40. In the present invention, the particulate matter in a state where it can freely move in the diaper is granular or powder as long as it is not fixed to the member constituting the diaper and can be freely moved at least in the plane direction. It is not limited to the shape, and includes an appropriate shape such as a short fiber shape or a block shape. However, the individual “particles” have a maximum length of 30 mm or less and a maximum weight of 1 g or less when the length is measured in an arbitrary direction. Of course, if the “particles” are too large, there is a sense of incongruity when worn, so the maximum length is actually 10 mm or less and the maximum weight is about 0.2 g or less.

As shown in FIG. 15, the second means is a pattern in which the fusion portion of the temperature change substance 40 is intermittent in at least one of the front-rear direction and the width direction (that is, a fusion portion and a non-fusion portion). Provided alternately). More specifically, in the example shown in FIG. 15A, a plurality of rows of fusion portions of the stripe-like or belt-like temperature change material 40 that are continuous along the front-rear direction are provided at intervals 47 in the width direction. It is what. Further, in the example shown in FIG. 15B, the fusion portions of the temperature change material 40 having an appropriate shape are arranged in a pattern that is intermittent in both the front-rear direction and the width direction. In this case, the shape of the fused portion of the temperature change substance 40 is rectangular in the illustrated example, but may be a rhombus, triangle, or circle. In addition, the arrangement of the fusion parts of the temperature change material 40 is a matrix in the illustrated example, but may be an arbitrary arrangement such as a staggered pattern. The interval between the fused portions of the temperature change material 40 can be determined as appropriate, but is preferably about 3 to 15 mm in both the front-rear direction and the width direction. The width 48 in the intermittent direction of each temperature change substance 40 is preferably about 3 to 40 mm, particularly about 5 to 10 mm. If the interval 47 between the fused portions of the temperature change material 40 is too wide or the width 48 is too narrow, the amount of the temperature change material 40 may be insufficient, and the interval 47 is too narrow or the width 48 is too wide. Then, there is a risk that flexibility will be insufficient.

Such intermittent arrangement of the fusion portion of the temperature change material 40 is performed after the temperature change material 40 is arranged in a predetermined intermittent pattern with respect to the fusion target member, and the heating pattern is intermittent (partial). Or by applying a melt of the temperature change substance 40 in a predetermined intermittent pattern. Also in the second means, the non-fused part (particulate part) of the temperature change substance 40 is preferably about 0 to 30% by weight, particularly 0 to 10% by weight.

In the third means, 30 to 90% by weight (particularly 50 to 70% by weight) of the temperature change material 40 is fused in a part containing a large number of temperature change materials 40 such as particles. At the same time, the remainder (70 to 10% by weight, particularly 50 to 30% by weight) of the temperature change substance 40 is not fused. As described above, by suppressing the fusion ratio of the temperature change substance 40, it is possible to reduce the hardening due to the fusion of the temperature change substance 40. Such a form cannot be manufactured when the above-described second fusion technique is used, but in the first technique, the temperature change substance 40 is disposed in a state where the temperature change substance 40 is disposed in a predetermined range of the fusion target member. It can be produced by heating so that 10 to 90% by weight of 40 is fused and the remainder is not fused. The first to third means can be used in combination of any two or three.

The degree of softening by these methods can be adjusted as appropriate, but the rigidity of the portion having the fused portion of the temperature change substance 40 in the diaper is 15 to 50 cN / 50 mm, particularly 20 to 35 cN / 50 mm. preferable. Incidentally, the rigidity of the portion of the temperature change material 40 that does not have the fused portion is preferably about 1 to 25 cN / 50 mm, particularly about 5 to 15 cN / 50 mm. The difference in rigidity between the portion having and not having is preferably about 5 to 20 cN / 50 mm.

The rigidity means bending rigidity (rigidity), and is measured according to the following method in accordance with JIS K-7171 (plastic-bending rigidity test method). For the measurement, a tensilon tester (curvature radius R1 = 5.0 ± 0.1 mm at the tip of the indenter, curvature radius R2 = 5.0 ± 0.2 mm at the tip of the support plate) was used, and the product 200 of the interior 200 Measure the bending stiffness. The test piece is prepared by removing the elastic elastic member that affects the measurement from the inner body 200 and cutting it into a rectangle having a diaper longitudinal direction of 80 mm and a diaper width direction of 50 mm. 50 mm in the unit of the flexural rigidity value is the length of the short side of the test piece, and is the width of the test piece bent with the indenter at the time of the test. Each test piece is placed on a pair of support plates, each having an arcuate cross-sectional tip, and the gap between the tips (upper ends) of both tips is aligned. The indenter tip is placed so as to be stretched over in the orthogonal direction and slightly in contact with the test piece. A load-deflection curve is obtained by lowering the indenter under conditions of a load cell of 5 kg (range 196 cN) and a speed of 30 mm / min. Let the maximum value of the obtained bending stress be a bending rigidity value (cN / 50 mm). In addition, when the site | part used as a measuring object is smaller than the said sampling dimension, it measures with a small scale test piece, and converts it by proportional calculation based on a dimension ratio.

As another method for preventing the movement of the temperature change material 40 without impairing flexibility, it is also proposed to provide the temperature change material 40 in the pocket portion as a fiber (or cotton) (not shown). Since the fibrous layer of the temperature change material 40 is flexible, even the portion having the temperature change material 40 is hardly hardened. Moreover, since it has a large surface area and fine voids between layers, dissolution in water (urine) is quick. Furthermore, it does not move freely within the diaper. Of course, there is almost no particulate matter that can move in the diaper.

In order to make the temperature change substance 40 into a fibrous layer, a general fiber technique or a hot melt adhesive application technique can be applied. Representative techniques include the spunbond method and melt blown method for fiber technology, and the curtain spray method for hot melt adhesive application technology. In these methods, fibrous materials are obtained by using different types of nozzle units, but the nozzle unit is common in that it includes a large number of outlets and air outlets for discharging the melt in a string form. The temperature change substance 40 supplied to the nozzle unit in a molten state is discharged from the discharge port. And the temperature change substance 40 discharged from the discharge port is made into a fiber by the air jetted from the air outlet, and is sprayed on the conveyor or on the member constituting the diaper, and filamentous fibers (continuous fibers) Forming a layer of aggregates. The air is preferably heated air. The temperature of the heated air is preferably the same as or higher than the melting point of the temperature change substance 40 by 50 ° C. or more, more preferably 50 to 120 ° C. higher than the melting point. The air injection pressure is preferably 1.0 to 3.0 kg / cm ³ .

Also, following the cotton candy manufacturing method, a cotton-like deposit of the temperature change substance 40 can be formed, and this can be used after being shaped or cut as appropriate. When the temperature change substance 40 is a sugar alcohol having properties similar to sugar, it is also a suitable method to apply the cotton candy manufacturing technique in this way.

The fibrous temperature change material 40 does not necessarily need to be fused. A part of the molten fibrous substance of the temperature change substance 40 can be firmly fixed by fusing to a member constituting the diaper. It is enough to prevent the movement of However, it is also possible to positively use this fibrous layer as a layer for adhesion. The fiber thickness of the temperature change material 40 can be determined as appropriate, but can be about 1 to 1000 dtex, and particularly preferably about 1 to 4 dtex.

Since other parts such as the portion where the layer of the fibrous temperature change material 40 is provided, the amount of use of the temperature change material 40, rigidity, and the like are the same as the fusion part of the temperature change material 40 in the main form described above, dare Description is omitted.

On the other hand, the movement of the temperature change substance 40 can be solved by fusing the temperature change substance to an appropriate member inside the absorbent article as described above, but the part where the temperature change substance 40 is fused becomes hard. The flexibility of the absorbent article may be impaired. Therefore, as shown in FIGS. 20A and 21, the temperature change substance 40 in the pocket portion 57 includes the front surface side member (portion located on the front surface side of the absorbent body 56 in the packaging sheet 58) and the back surface side. It is sandwiched between members (portions on the back side of the absorbent body 56 in the packaging sheet 58), and only a part 41 thereof is fused to the front side member and the back side member in a frame shape, and the remaining part 42 is not A form is also proposed in which the particles are enclosed in a movable state in a portion surrounded by a frame-like fusion portion as fusion particles.

The inner side of the frame-shaped fusion part 41 is surrounded by the packaging sheet 58 that is the front-side member and the rear-side member in the front and back direction, and the periphery is surrounded by the frame-like fusion part 41, so The non-fused particulate temperature change substance 42 can move only within the range of the frame-like fused portion 41. Therefore, the movement of the temperature change substance 40 is suppressed, and an expected temperature change occurs. In addition, since the fused portion 41 of the temperature change substance 40 has a frame shape, it becomes much more flexible than fusing the whole in a planar shape, and it is possible to suppress hardening due to fusion of the temperature change substance.

The number of the frame-like fused portions 41 may be only one, but it is preferable to provide a large number with a somewhat small size. In the latter case, a large number of quadrangular or circular frame-like fused portions can be provided, but it is preferable to provide a lattice-shaped fused portion 41 as shown in the figure. As a lattice pattern, in addition to a pattern composed of a fusion line along the front-rear direction and a fusion line along the width direction, as shown in FIG. 22, a fusion line along an oblique direction intersecting with the front-rear direction and the width direction. It is also possible to use an oblique lattice pattern consisting of only the above. In the grid pattern, as shown in FIG. 22A, each fusion line may be a continuous line, but as shown in FIG. The non-fused portion N is composed of dotted welded lines alternately arranged, and at each crossing position, either one of the fused wires passes through the non-fused portion N of the other fused wire with a gap, As shown in FIG. 22 (c), the fusion part M and the non-fusion part N of the temperature change material are composed of dotted fusion lines that are alternately arranged, and the non-bonding of both fusion lines at each intersection position. The pattern in which the fusion part N is located is preferable because the fusion part 41 of the temperature change substance becomes discontinuous, and the hardening by the fusion part 41 is further reduced.

Specifically, the rigidity of the part having the fusion part of the temperature change substance 40 in the diaper is preferably 15 to 50 cN / 50 mm, particularly preferably 20 to 35 cN / 50 mm. Incidentally, the rigidity of the portion of the temperature change material 40 that does not have the fused portion is preferably about 1 to 25 cN / 50 mm, particularly about 5 to 15 cN / 50 mm. The difference in rigidity between the portion having and not having is preferably about 5 to 20 cN / 50 mm.

The dimensions of the frame-like fused portion 41 can be appropriately determined, but the width 41w of the frame line is preferably about 1 to 5 mm, and the area inside the frame is preferably about 100 to 1000 mm ² . In the case of having a lattice-like fusion pattern, it is preferable that the length (center distance) 41d between intersecting positions is about 10 to 40 mm, and the intersecting angle θ (inner side angle) is 60 to 120 degrees. Further, in the case of adopting the above-described grid pattern composed of dotted fused lines, when the length of the fused portion M in each fused line is L and the gap is d, 0.1 L ≦ d ≦ 0 It is preferable that the 4L relationship is satisfied. The position of the non-fused portion N is not limited to each intersection position, and the non-fused portion N may be located at a position other than each intersection position as long as the above relationship is satisfied.

Further, since the temperature change material 40 is fused by heating, when there is a member heated together with the temperature change material 40, the melting point of the temperature change material 40 is the temperature change material as in the above-described embodiment. It is desirable that the material be lower than the member heated with 40.

In addition, when the fusion target member of the temperature change material 40 is a fiber assembly such as a nonwoven fabric or an absorbent body 56, if the temperature change material 40 has a too high viscosity at the time of melting, it does not easily penetrate into the fiber gap and adheres. If the viscosity is too low, it becomes difficult for the fused portion to continue in a frame shape. From this viewpoint, the temperature changing substance 40 preferably has a viscosity of 5 to 80 poise at a melting temperature (for example, 70 to 130 ° C.).

As the front side member and the back side member that sandwich the temperature change substance 40, it is preferable to use an existing member as shown in FIG. 20A, and an absorbent body 56 can be used in addition to the packaging sheet 58. Moreover, although not shown in figure, when it has a surface side absorber and the back surface side absorber which overlaps the back surface side like a two-layer structure absorber, a surface side member is made into a surface side absorber, and a back surface side member is a back surface It can also be used as a side absorber.

Further, without using a member normally provided in a diaper, a dedicated member can be provided as at least one of the front surface side member and the back surface side member. FIG. 20B shows this example, in which dedicated first and second liquid-

permeable sheets

45 and 46 are provided as a front surface side member and a back surface side member, respectively. In this case, as shown in FIG. 23A, the front side member is a front side layer 47a in a layer structure formed by folding one liquid-permeable sheet 47, and the back side member is a front side layer 47a. It can also be set as the back surface side layer 47b adjacently arranged on the back surface side. The number of times of folding is not particularly limited, and it can be folded in two as shown in FIG. 23 (a), or can be folded in three (as shown in FIG. 23 (b)). . In the latter case, the intermediate layer 47b of the sheet 47 is a back side member for the upper temperature change substance 40 and a front side member for the lower temperature change substance 40. As the liquid permeable sheets 45 to 47, the same material as the above-described top sheet 30 and the second sheet 44 or the same material as the packaging sheet 58 can be used.

In the case where the temperature change material 40 is fused in a frame shape, the fusion site is preferably the entire inside of the pocket portion 57, but can also be a part, and the temperature change material 40 is contained outside the pocket portion 57. In this case, the temperature change substance can be fused to the adjacent member.

The dimensions of the front side member and the back side member are not particularly limited as long as the temperature change material 40 is within the range in which the temperature change material 40 is provided. It is preferable that the temperature change substance spills out from between the front surface side member and the back surface side member.

As a method for fusing the temperature change substance 40 to the front surface side member and the back surface side member in a frame shape, as shown in FIG. The object 400 to be processed with the temperature change material 42 sandwiched between the embossing pattern having a frame-like portion such as a lattice and a temperature at which the temperature change material 42 is melted. As shown in the figure, a method (first method) is proposed in which irregularities of a predetermined pattern are formed on the surface of one or both of the rolls 340 and only the frame-like fused portion is heated under pressure. . As a result, the fused portion 41 is formed only in the pressure heating region corresponding to the convex pattern of the embossing roll 340, and the other portion inside the frame is not pressurized and heated, and the temperature change Fusion of the substance 42 does not occur. This first method is preferable because the frame-like fused portion 41 can be formed only by heat embossing of an appropriate pattern.

As the second method, as shown in FIG. 13B, either one of the front-side member 48 and the back-side member 49 is applied in accordance with the application of the hot-melt adhesive used in the technical field of absorbent articles. On the opposite surface, a temperature change substance melt 41 is applied in a frame shape using a nozzle, roll transfer, or the like, and at least the particulate temperature change substance 42 is disposed inside the frame 41, A method is proposed in which the other member is stacked on top, and the front side member 48 and the rear side member 49 are adhered by cooling and solidifying the melt 41 as an adhesive. This second method is also a preferred form because it is easy to incorporate into the production line for absorbent articles.

Also, as the third method, as shown in FIG. 13C, it is also proposed to combine the first method and the second method described above. That is, on the opposing surface of either the front surface side member 48 or the back surface side member 49, the melt 41 of the temperature change material 41 intersects the first direction at a plurality of positions spaced in the first direction. 2 is applied linearly along the direction of 2 and a particulate temperature change substance 42 is disposed at least between the application lines 41, and the other member is stacked on the surface, and the melt 41 is used as an adhesive on the surface side. The material 48 and the back side member 49 are bonded together, and then, at a temperature at which the temperature change substance 42 is melted, a linear heat embossing process is performed along the first direction with an interval in the second direction. is there. When this third method is incorporated into a manufacturing line for absorbent articles, it is preferable that the first direction is the line CD direction and the second direction is the MD direction.

Furthermore, as a fourth method that is completely different from the first to third methods, as shown in FIG. 13D, a melting point is relatively between the front surface side member 48 and the back surface side member 49. The low-melting-point temperature-changing substance 42b is arranged in a state where the low-particulate low-melting-point temperature-changing substance 42b is arranged in a frame and the high-melting-point temperature-changing substance 42a having a relatively high melting point is arranged inside the frame. A method of heating so that the high melting point temperature change substance 42a does not melt is proposed. According to the fourth method, pattern heating and pattern application are not required (pattern heating or the like may be performed).

The heating means in the fourth method is not particularly limited. For example, the air-through dryer shown in FIG. 16, the heating means shown in FIGS. 17 (a) and (b), the heating means shown in FIG. 18, and FIG. 19 (a). The heating means shown in FIG.

The heating and melting of the temperature change material 40 in the fourth method is not limited to the process of attaching the front side member and the back side member to other members, but at an appropriate stage in the subsequent manufacturing process, for example, the assembly completion state of the interior body 200 (product It can also be performed on the interior body 200 and the entire diaper after assembly to the state) or after assembly to the product state. As a heating method in this case, for example, the heating means shown in FIGS. 16 to 19 described above can be applied.

The fusion part formed by the above-described first to fourth methods depends on conditions such as the amount of the temperature change substance 40 and the heating time, but a plurality of temperatures melted with respect to the front side member and the back side member. The bulk or film-like temperature change substance 40 in which the change substances are integrated is attached in a frame shape. The fused temperature change material 40 is melted once, liquefied, and then solidified, so that the surface area is small. Therefore, since the contact area with the urine in the temperature change substance 40 becomes small, the temperature change speed is suppressed and the sustainability is improved. Here, it is a preferable form to use a particulate matter having a low bulk density as the temperature change substance 40. Then, the difference between the fast-acting effect and the slow-acting effect can be made clearer. If the particle-like temperature change substance 40 has the same particle size, the lower the bulk density, the larger the surface area and the higher the contact efficiency with urine, and thus the temperature change speed becomes faster. This tendency is particularly remarkable when the temperature change substance 40 is dissolved in urine to cause a temperature change.

As the particulate temperature change material 40 having a low bulk density, the same material as that described above can be used, and the bulk density of the fused portion should be higher than these.

On the other hand, in the case of continuous production using a production line, it is preferable that the material is supplied in a continuous band shape and is cut into a predetermined dimension at predetermined intervals in the MD direction after the frame-shaped fusion part is fused. However, in this case, there is a possibility that the temperature change substance may spill from the cut end in the manufacturing process of the product, the transportation process to the sales destination, the usage process by the user, and the like. Therefore, as shown in FIG. 25 (a), after carrying out the first to fourth methods described above while conveying the front side member and the back side member each having a continuous belt shape in a predetermined direction, The front side member 48 and the back side member 49 on which the frame-shaped fusion part 41 is formed are cut at a predetermined interval in the MD direction, and at the same time, the cut end portion (the upstream side in the flow direction and the cut position). It is preferable to perform linear heat embossing along the CD direction on both the downstream side). Reference numeral 41E in the drawing indicates this embossed portion. In this case, since the interval from the cutting position to the fused portion 41 of the linear temperature change material along the adjacent CD direction is narrowed, the amount of the particulate temperature change material 42 falling down can be reduced. In particular, it is preferable that the heat emboss 41E forms a fused portion of a linear temperature change material along the CD direction as in the first method described above. However, the surface side member 48 and the back side member 49 have a certain degree of extent. It may be simply bonded with strength.

Further, in the case where the fused portion 41 of the linear temperature change material along the CD direction is formed at intervals in the MD direction by performing the above first to fourth methods, FIG. 25 (b) As shown in FIG. 4, the interval Dc between the fused portions of the linear temperature change material along the CD direction adjacent to the MD direction one side and the other side of the planned cutting position CT is made smaller than the interval Do of the other portions. Is also preferable. Also in this case, since the interval from the cutting position to the fused portion 41 of the linear temperature change material along the adjacent CD direction is narrowed, the amount of the particulate temperature change material 42 falling down can be reduced.

Cutting in these methods is performed in advance prior to attachment to other members, and depending on the type of the front side member and the back side member, it can also be performed by cutting into individual products.

On the other hand, in order to prevent the movement of the temperature change substance 40, as described above, when the temperature change substance is fused to an appropriate member inside the absorbent article, the contact efficiency with moisture decreases due to the decrease in the surface area of the temperature change substance. In addition, the temperature change efficiency may be reduced. Accordingly, it is also proposed to use a molded piece 40T obtained by compression molding the particulate temperature change material 40 as shown in FIG. Although there may be only one molded piece 40T, it is preferable that the molded piece 40T is present as a plurality or a plurality of small pieces because it causes the wearer to feel a foreign object when it is too large. The molded pieces 40T of these temperature change substances are not bonded to adjacent members and are contained in a movable state, but are larger than the fiber gap of the packaging sheet 58 and the fiber gap of the absorbent body 56. And since it is pinched | interposed between these members, it can hardly move to any of the direction and thickness direction along a surface. In addition, since the temperature change substance shaped piece 40T has a porous structure, the surface area, that is, the contact area with moisture is much larger than that of a simple melt-solidified substance of the temperature change substance particles, so that the temperature change efficiency is almost reduced. Less or less if not. Therefore, the movement of the temperature change substance 40 is suppressed, and the contact efficiency between the temperature change substance and moisture is not easily lowered, so that an expected temperature change is likely to occur.

As the front surface side member and the back surface side member sandwiching the molded piece 40T of the temperature change substance, it is preferable to use existing members as shown in FIG. 26 (a), and the absorbent body 56 is used in addition to the packaging sheet 58. You can also. Moreover, although not shown in figure, when it has a surface side absorber and the back surface side absorber which overlaps the back surface side like a two-layer structure absorber, a surface side member is made into a surface side absorber, and a back surface side member is a back surface It can also be used as a side absorber.

Further, without using a member normally provided in a diaper, a dedicated member can be provided as at least one of the front surface side member and the back surface side member. FIG. 26B shows this example, in which dedicated first and second liquid-

permeable sheets

45 and 46 are provided as a front surface side member and a back surface side member, respectively. In this case, as shown in FIG. 27A, the front side member is a front side layer 47a in a layer structure formed by folding one liquid-permeable sheet 47, and the back side member is a front side layer 47a. It can also be set as the back surface side layer 47b adjacently arranged on the back surface side. The number of times of folding is not particularly limited, and it can be folded in half as shown in FIG. 27 (a), or can be folded in three (as shown in FIG. 27 (b)). . In the latter case, the intermediate layer 47b of the sheet 47 serves as a back surface side member for the upper temperature change substance molding piece 40T, and serves as a front surface side member for the lower temperature change substance molding piece 40T. Become. As the liquid permeable sheets 45 to 47, the same material as the above-described top sheet 30 and the second sheet 44 or the same material as the packaging sheet 58 can be used. Moreover, it is preferable that the end portion of the sheet is folded and wrapped so as to have an overlapping portion as in the above-described packaging sheet 58 because the temperature change substance 40 can be prevented from falling off from the end portion.

The molded piece 40T of the temperature change substance may be formed only from the temperature change substance 40 described above, but may be formed by mixing other substances as long as it is about 50% or less. For example, when the superabsorbent polymer particles are mixed, urine cooled or heated by the temperature change substance 40 is absorbed on the spot by the superabsorbent polymer and stops on the surface of the article. Can communicate. In order to retain the cooled or heated urine, hydrophilic fibers such as pulp and hydrophilic synthetic fibers may be mixed.

The range (the range along the diaper surface direction) in which the temperature change substance molding piece 40 </ b> T is provided is preferably the entire inside of the pocket portion 57, but can also be a part of the temperature change substance 40 outside the pocket portion 57. In the case where the temperature change substance 40 is contained, the temperature change substance 40 can also be provided in the form of a molded piece 40T.

The front side member and the back side member are not particularly limited as long as the temperature change material molding piece 40T is within the range in which the temperature change substance molding piece 40T is provided. , And the temperature change material is less likely to spill from between the front surface side member and the back surface side member.

In general, when the particles are compressed to fill the voids between the particles, the compressive force increases, the bridge supported between the particles collapses, the voids are filled, and the particles themselves are deformed. The part is destroyed and the newly formed fine particles fill the voids, and the particles are strongly adhered due to plastic deformation of the particles, and at the contact point of the particles, the surface melts due to the heat generated by sliding friction between the particles, and the particles are bonded. Even if the compressive force is removed, the shape does not collapse. The compression-molded piece 40T of the temperature change material is formed using such a principle. In the case where the particles are difficult to mold, a binder (binder) can be used. Sugar alcohols such as sorbitol and xylitol are suitable temperature-change substances in that the particles are easy to mold.

The degree of compression of the molded piece 40T can be appropriately determined according to the particle size, density, etc. of the raw material particles. As the raw material particles, porous particles having a low bulk density such as granules, particles having a lot of surface irregularities, and particles having fine pores on the surface or inside are suitable. The degree of bulk density of the raw material particles may be determined as appropriate, but it is preferably 50% or less of the true density (having 50% or more voids (space) with respect to the apparent volume). For example, in the case of sorbitol, the true density is so 1.50 g / cm ^3, preferably bulk density is 0.75 g / cm ³ or less, more preferably ^{0.50 ~ 0.70g / cm 3, 0.55} ~ 0 .65 g / cm ³ is particularly preferred. In addition, when the particle size is large, the apparent bulk density is small, but the surface area is not large. Therefore, when the particulate temperature change material 40 is used, the average particle size (JIS K 1474-2007 median diameter) is 200 to 600 μm. It is preferable that The bulk density of the molded piece 40T only needs to be higher than these, and specifically, a compact compressed to about 50 to 80%, particularly about 55 to 70% of the true density is preferable. When sugar alcohol particles having an average particle diameter of 200 to 600 μm and a bulk density of about 0.50 to 0.70 g / cm ³ are used, the bulk density of the molded piece 40T is about 0.75 to 1.10 g / cm ³ , particularly It is preferable to perform compression molding so as to be about 0.80 to 1.00 g / cm ³ .

The size of the molded piece 40T can be determined as appropriate, but if it is too fine, it will move easily, and if it is too large, it will give a foreign object feeling. Therefore, a flat piece having a thickness of 0.5 to 2.0 mm and an area of 50 to 1000 mm ² is used. Preferably there is. Further, the weight of the particulate matter remaining in the compression molding process, or the formed piece 40T is divided or subdivided by bending or the like in the subsequent diaper manufacturing process, and the strip having an area of 50 mm ² or less existing in the article The weight of is preferably 50% or less, more preferably 30% or less, based on the total amount of the temperature-changing substance used. (That is, the weight ratio of the molded piece 40T having a thickness of 0.5 to 2.0 mm and an area of 50 to 1000 mm ² with respect to the weight of the total temperature change material is preferably 50% or more, particularly preferably 70% or more. .)

On the other hand, in the absorbent article having such a molded piece 40T, for example, a molded piece 40T of a temperature change substance is produced in advance by compression molding such as tableting, and this is performed at an appropriate stage when assembling the article. However, as a manufacturing facility for absorbent articles, a technology for mixing a certain amount of size such as a tablet is not widely used, so a new development of the manufacturing facility is required. There's a problem. For this reason, the present invention also proposes a technique for mixing a shaped piece of a temperature change substance between predetermined members by using or applying an existing technique. That is, as shown in FIG. 28, the particulate temperature change substance 40p is compressed by a pair of

rolls

340 and 341 in a state where the particulate temperature change substance 40p is sandwiched between the predetermined front surface side member 48 and the back surface side member 49. This includes a step of compressing a part or the whole of the temperature change substance 40p to form the molded piece 40T. As can be seen from these production forms, even if all the temperature change substances contained in the product are the molded pieces 40T, or some of the temperature change substances 40p remain in the particulate form or after being once molded. It may be particulate 40p due to collapse or the like.

As a pair of

rolls

340 and 341 used for compression molding, both

rolls

340 and 341 may be smooth rolls having no irregularities on their surfaces, or embossing rolls having irregularities of a predetermined pattern on either or both surfaces. You can also Even in the former case, since the entire particulate temperature change substance 40p is not compressed at a time, the whole does not become one large molded piece, but as shown in FIG. A large number of small pieces 40T are formed. In the latter case, a large number of small pieces 40T having a regular shape can be formed by the emboss pattern. Further, it is preferable that a small piece having an area of 50 to 1000 mm ² is 50% or more.

As shown in FIG. 10B and FIG. 27, when the front side member and the back side member are sheets, it is easy to perform the above-described compression molding process before assembling these sheets to other members. The product can be manufactured. In addition, when arrange | positioning and compressing the particulate matter of a temperature change substance between sheets, a particulate matter may move between sheets between arrangement | positioning and compression, and deviation and spill may arise. Such a problem can be solved to some extent by making the sheet fluffy or bulky, but by mixing a certain amount of fiber such as pulp or synthetic fiber with particulate matter of temperature change material, You may prevent the movement of the particulate matter before compression. In this case, the mixing ratio of the fibrous material is suitably 50% or less, preferably about 10 to 30%. Since sugar alcohols such as sorbitol and xylitol are easy to form particles, they can be formed even by mixing materials that are difficult to be compression-molded. The superabsorbent polymer particles can also be mixed.

Further, when using an absorber as either one of the front side member and the back side member, particularly when the front side member is the packaging sheet 58 and the back side member is the absorber 56 as in the example of FIG. A particulate temperature change material is sprayed between the front surface or the back surface of the absorber 56 or an absorber having a two-layer structure, and then the absorber 56 and the temperature change material are wrapped by a packaging sheet 58 to form a package absorber. Then, the product can be easily manufactured by compressing the package absorbent body with a pair of rolls. As described above, in a general manufacturing method of an absorbent article, the absorbent body 56 after being wrapped with the packaging sheet 58 is pressurized with a pair of rolls for the purpose of fixing the packaging sheet 58 and the like. Such a manufacturing method can be adopted only by changing the pressurizing condition by compression molding using pressure, and it is very easy to apply to existing facilities. In addition, it is easy to appropriately mix the superabsorbent polymer and the fibrous material in the molded piece 40T by adjusting the method of spraying the particulate temperature change material and the method of forming the absorber 56.

The present invention can be applied to a wide range of uses such as pants-type, tape-type, or pad-type absorbent articles. In particular, in addition to the disposable diaper for training, it can be used for the purpose of suppressing bacterial growth, odor suppression, cooling prevention, etc. by cooling the excrement.

It is a top view in the state where the diaper was developed showing the inside of a pants type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a pants type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 in FIG. FIG. 7 is a sectional view taken along line 7-7 in FIG. FIG. 8 is a sectional view taken along the line 8-8 in FIG. It is a top view in the state where a diaper was developed showing only a principal part of a pants type disposable diaper with a size. It is sectional drawing which shows only the principal part of an underpants type disposable diaper with a dimension. It is a front view of a product state. It is a rear view of a product state. It is a top view of other absorber examples. It is a top view of another absorber example. It is a graph of an experimental result. It is sectional drawing of the comparative example corresponded to the part shown by FIG. It is a principal part top view of another form. It is a principal part top view of another form. It is the schematic which shows a heating means. It is the schematic which shows a heating means. It is the schematic which shows a heating means. It is the schematic which shows a heating means. It is principal part sectional drawing of another form. It is a principal part top view of another form. It is a principal part top view of another form. It is principal part sectional drawing of another form. It is a principal part top view of various manufacture forms. It is a principal part top view of another manufacturing form. It is principal part sectional drawing of another form. It is principal part sectional drawing of another form. (A) Schematic of manufacturing process, (b) Schematic plan view of molded piece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Girth part, 11 ... Liquid impervious sheet, 12F ... Abdominal exterior sheet, 12B ... Back side exterior sheet, 200 ... Interior body, 30 ... Surface sheet, 40 ... Temperature change substance, 50 ... Absorbing element, 52 ... Fibers 54... Superabsorbent polymer particles 56. Absorber 57. Pocket portion 58. Packaging sheet 60. Side barrier cuff 62. Barrier sheet 70.

Claims

It has a front side portion that extends to the front side from the center in the longitudinal direction of the article, and a rear side portion that extends to the rear side from the center in the longitudinal direction of the article,
In a disposable absorbent article comprising an absorbent portion in which an absorber is interposed between a liquid-permeable top sheet and a back sheet,
The absorbent body extends 30 to 48% of the total length of the article from the center in the longitudinal direction of the article to the front side.
The absorbent body has a pocket portion having a thickness of 0 to 50% of the surrounding area including a portion of 20% of the total length of the article from the center in the longitudinal direction of the article, and the front end of the pocket portion and the absorbent body Formed so that the distance from the front end of the product is 5 to 30% of the total length of the article,
In the pocket portion, a temperature change substance that cools or heats urine by contact with urine is disposed,
A disposable absorbent article characterized by that.
The temperature-changing substance causes endothermic reaction when dissolved in urine, cools urine, and has a solubility in 100 ml of water at a temperature of 20 ° C. of 30 g or more,
The basis weight of the temperature change substance in the pocket is 500 to 1000 g / m 2 ;
The total area of the pocket portion is 2500 to 8000 mm 2 .
The total amount of heat change that can occur in the absorber due to the temperature change material is 20 cal or more,
The calorie change per unit area of the portion having the temperature change substance is 1 cal / cm 2 or more.
The disposable absorbent article according to claim 1.
The absorber includes 120 to 200 g / m 2 of hydrophilic fibers and 170 to 220 g / m 2 of superabsorbent polymer particles, and the content of the superabsorbent polymer is higher than the content of the hydrophilic fibers. The disposable absorbent article according to claim 2, wherein the disposable absorbent article is large.
The disposable absorbent article according to claim 3, wherein a particulate temperature change material is incorporated in the pocket portion as the temperature change material.
Around the pocket portion, at least in the vicinity of the front end portion of the pocket portion, the superabsorbent polymer is disposed at the highest density compared to the other regions of the absorber.
The disposable absorbent article according to claim 4.
The disposable absorbent article according to claim 5, wherein at least a part of the excretion indicator whose color is changed by contact with moisture is provided so as to overlap the pocket part, and the temperature change substance has hygroscopicity.
The pocket portion is within the range of 0 to 40% of the total length of the article from the center in the longitudinal direction of the article to the front side, the length in the longitudinal direction is 10 to 20% of the total length of the article, and the width is 25 to 60% of the total width of the absorber. The disposable absorbent article according to claim 5, wherein
The absorbent body extends 30 to 48% of the total length of the article from the center in the longitudinal direction of the article to the front side and 25 to 45% of the total length of the article on the rear side.
The pocket portion extends from the center in the front-rear direction of the article to 25 to 45% of the total length of the article on the front side, 20 to 40% of the total length of the article on the rear side, and extends along the center in the width direction of the article. 25-60% of the total width,
The disposable absorbent article according to claim 5.
The absorbent body extends 30 to 48% of the total length of the article from the center in the longitudinal direction of the article to the front side and 25 to 45% of the total length of the article on the rear side.
The pocket portion is formed in an annular shape so as to surround the central area of the absorbent body, and the line width thereof is 5 to 10% of the total length of the article. The central area extends from the center in the longitudinal direction of the article to the front side of the article. 15 to 35%, and 15 to 35% of the total length of the article on the rear side, extending along the center in the width direction of the article, and the width is 40 to 75% of the total width of the absorbent body.
The disposable absorbent article according to claim 5.
The disposable absorption according to claim 3, wherein the temperature-changing substance does not have a particulate portion in a state where it can freely move in at least a plane direction, or has only a small amount, and most of the temperature-changing substance is arranged not to move. Sex goods.
The disposable absorbent article according to claim 10, wherein the absorbent body is entirely wrapped with a packaging sheet, and the temperature change substance is fused to at least one of the absorbent body and the packaging sheet.
The disposable absorbent article according to claim 11, wherein the temperature change substance is fused and the fused temperature change substance is crushed.
The temperature change substance is sandwiched between a front surface side member and a back surface side member positioned on the front surface side and the back surface side, respectively, and a part thereof is fused to the front surface side member and the back surface side member, and the remaining portion is the It is not fused to the front side member and the back side member,
The fused portion of the temperature change material forms a frame shape, and the non-fused temperature change material is enclosed in a portion surrounded by the frame-like fused portion,
The disposable absorbent article according to claim 10.
A plurality of the frame-like fusion parts are arranged to form a lattice-like pattern, and the lattice-like pattern is a dotted-line fusion line in which the fusion parts and non-fusion parts of the temperature change substance are alternately arranged. The disposable absorbent article according to claim 13, which has a pattern in which at least one fusion line is discontinuous at each intersection position.
The temperature changing material contains a high melting point temperature changing material having a relatively high melting point and a low melting point temperature changing material having a relatively low melting point, and the frame-like fused portion is the low melting point temperature changing material. The disposable absorbent article according to claim 13, wherein the high-melting-point temperature converting substance is contained as a non-fused temperature change substance in a part formed by fusing and surrounded by the frame-like fused part.
The disposable absorbent article according to claim 3, wherein as the temperature change substance, a temperature change substance formed in a fiber shape is incorporated in the pocket portion.
The disposable absorbent article according to claim 3, wherein a molded piece obtained by compression molding a particulate temperature change substance as the temperature change substance is incorporated in the pocket portion.
The molded piece is formed by compression molding sugar alcohol particles having an average particle size of 200 to 600 μm and a bulk density of 0.50 to 0.70 g / cm 3 so that the bulk density is 0.80 to 1.10 g / cm 3. The disposable absorbent article according to claim 17, which is a porous piece obtained as described above.
19. The disposable absorbent article according to claim 18, wherein the molded piece is a flat piece having a thickness of 0.5 to 2.0 mm and an area of 50 to 1000 mm 2 and a plurality or a plurality of pieces in the pocket portion.