JP2013172863A - Wearing article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wearing article having excellent sweat absorbency, and improved in steaminess suppression inside the wearing article by effectively discharging absorbed sweat to the outside.SOLUTION: A wearing article 1 includes a belly side part A, a back side part B, and a crotch part C, and includes, in a wearing state, a waist opening part 5 formed by the upper edge of an annular waist region, and a pair of leg opening parts 6. The article 1 includes an outer layer sheet 12 forming the outermost face of the article 1, and an absorbent body 10 inside the outer layer sheet 12. The wearing article 1 includes a hydrophilic sweat-absorbing region R1 abutting on the skin of a wearer in the wearing state of the article 1 between a longitudinal end part of the absorbent body 10 and the lower edge of the waist region. A region facing the sweat-absorbing region R1 in the thickness direction Z of the article 1 of the outer layer sheet 12 is in a non-junction state to a member wherein a nearly whole region is positioned just inside a lateral-direction X center area of the article 1.

Description

  The present invention relates to a worn article.

  It is known that an absorbent wearing article generally has a low wearing feeling compared to underwear. One of the causes is that the wearing article uses a material having lower sweat absorbency and quick drying than underwear. Humans are constantly sweating (insensitive digestion), and the amount of sweat is greater in the abdomen and back than in the crotch.

  Then, the technique which prevents the stuffiness of the part which is easy to sweat by arranging a sweat-absorbing sheet | seat on the wearer's skin opposing surface in an absorbent wear article, and prevents the rash etc. resulting from this (for example, is proposed) Patent Documents 1 and 2). In addition to the sweat-absorbing performance, a technique for further suppressing the occurrence of rash by adding a drug, an antibacterial agent, or the like to the sweat-absorbing sheet has been proposed (see, for example, Patent Documents 3 and 4). Furthermore, Patent Document 5 discloses a technique for releasing steam by providing a non-adhesive portion between the sweat-absorbent sheet and the outer layer sheet toward the waist opening.

JP 2000-189454 A Japanese Patent Laid-Open No. 2003-235892 JP 2002-153507 A JP 2007-325915 A JP 2009-82482 A

  However, in the techniques described in Patent Documents 1 and 2, if a large amount of sweat is used and the absorbent capacity of the sweat-absorbent sheet is exceeded as in summer wear, it may be difficult to prevent stuffiness. is there. In the techniques described in Patent Documents 3 and 4, effects such as prevention of rash caused by drugs and the like are limited, and there is room for improvement in suppressing rash caused by stuffiness. Furthermore, in the technique described in Patent Document 5, normally, from the viewpoint of preventing slippage of absorbent articles and leakage of excrement, the tightening force by the waist opening is relatively high, so that the release of steam through the waist opening is prevented. It may not be performed smoothly, and the vapor release effect is limited.

  Accordingly, an object of the present invention is to provide a wearing article that is excellent in sweat-absorbing property and improved in the suppression of stuffiness in the wearing article by effectively releasing absorbed sweat to the outside.

  The inventors have intensively studied to solve this problem, and arranged the hydrophilic sweat-absorbing sheet so as to contact the skin of the wearer, and the outer layer sheet in a position facing the sweat-absorbing sheet. And the member located inside the outer layer sheet, it was found that the above-mentioned problem can be solved by forming a non-bonding region to form a space for vapor divergence.

  The present invention has been made based on the above knowledge, and has a ventral side portion and a dorsal side portion and a crotch portion positioned therebetween, and a longitudinal direction extending between the ventral side portion and the dorsal side portion via the crotch portion; A wearing article comprising a waist opening and a pair of leg openings that are provided with a lateral direction orthogonal to this and formed by the upper edge of the annular waist region in a worn state, wherein the article forms the outermost surface of the article An outer layer sheet, a liquid-permeable surface sheet, a back sheet, and an absorbent main body having an absorbent body interposed therebetween, inside the outer layer sheet, and further the skin of the wearer in the wearing state of the article A hydrophilic sweat-absorbing region that abuts between the longitudinal end of the absorbent main body and the lower edge of the waist region, and the sweat-absorbing property in the thickness direction of the wearing article of the outer layer sheet The area opposite the area is the object In the lateral central region, substantially the entire region is in member and non-bonding state located immediately inside, there is provided a wearing article.

  According to the wearing article of the present invention, it is possible to absorb sweat generated from the wearer's body in the wearing state, and to effectively evaporate the absorbed sweat to the outside of the wearing article.

FIG. 1 is a perspective view showing a pants-type disposable diaper as a first embodiment of the wearing article of the present invention. FIG. 2 is a developed plan view showing the inner surface side in the developed and extended state of the diaper shown in FIG. 3 is a cross-sectional view taken along line III-II in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a schematic diagram showing a floating portion and a heel formed in the upper abdominal region. FIG. 6 is a cross-sectional view (corresponding to FIG. 3) of a pants-type disposable diaper as a second embodiment of the present invention. FIG. 7 is a cross-sectional view (corresponding to FIG. 3) of a pants-type disposable diaper as a third embodiment of the present invention. FIG. 8 is a cross-sectional view (corresponding to FIG. 3) of a pants-type disposable diaper as a fourth embodiment of the present invention. FIG. 9 is a graph showing the relationship between the heat flow rate and time measured in the evaluation of vapor release performance performed in the examples and comparative examples.

  The present invention will be described below based on preferred embodiments with reference to the drawings. 1 to 4 show a pants-type disposable diaper 1 (hereinafter also referred to as “diaper 1”) as a first embodiment of the present invention. The diaper 1 includes an exterior body 11 and an absorbent main body 10 fixed to the inner surface side of the exterior body 11. The diaper 1 includes an abdominal side A disposed on the stomach side of the wearer in a worn state, a back side B disposed on the back side, and a crotch part positioned between them and disposed on the wearer's crotch part. C.

  In the present specification, the longitudinal direction of the diaper 1 is a direction extending between the ventral portion A and the dorsal portion B via the crotch portion C, and is the Y direction in FIG. Moreover, the horizontal direction of the diaper 1 is a direction orthogonal to the vertical direction Y, and is the X direction in FIG. In the diaper 1, the “expanded and extended state” means that the diaper 1 is in an expanded state and the expanded diaper 1 is stretched by elastic members of each part to be designed in a planar shape without any influence of the elastic members. It is the same as when it was expanded). The longitudinal direction and the lateral direction of the absorbent main body 10 are directions corresponding to the longitudinal direction and the lateral direction of the diaper 1, respectively. Moreover, in each of the abdominal side part A and the back side part B, since the vertical direction of the diaper 1 is a vertical direction in the wearing state, the waist opening edge W side in the vertical direction of the abdominal side part A and the back side part B The upper part and the crotch part C side are also expressed as the lower part. Moreover, the side close | similar to a wearer's skin in the wearing state of the diaper 1 is called a skin side, a skin contact surface side, or an inner side, and the side farther from the skin than these is a non-skin side, a non-skin contact surface It is called side or outside.

  The absorptive main body 10 in the diaper 1 has a substantially rectangular shape that is long in the same direction as the longitudinal direction Y of the diaper 1 as shown in FIG. The absorbent main body 10 includes a liquid-permeable top sheet 2, a liquid-impermeable or liquid-permeable (water-repellent) back sheet 3, and a liquid-retaining absorbent disposed between the sheets 2 and 3. 4. The top sheet 2 and the back sheet 3 cover each surface of the absorbent body 4 and extend outward from the outer edge of the absorbent body 4.

  Further, as shown in FIG. 2, side cuffs 8, 8 made of a material having liquid resistance or water repellency and breathability are formed on the absorbent main body 10 on the left and right sides along the longitudinal direction Y. In the vicinity of the free end of each side cuff 8, a plurality of side cuff elastic members 81 are arranged in an extended state. The side cuff 8 stands up when the diaper is worn to prevent the liquid from flowing out to the side.

  The exterior body 11 arranged on the back sheet 3 side of the absorbent main body 10 has an outer layer sheet 12 and an inner sheet 13 positioned on the inner side in the diaper thickness direction than the outer layer sheet 12 as shown in FIGS. doing. The inner sheet 13 has an inner layer sheet 14 and an auxiliary sheet 15. Further, the inner sheet 13 also has folded portions 12a and 12b of the outer layer sheet 12 formed by folding the sheet material constituting the outer layer sheet 12 to the inner surface side at the waist opening edge W. That is, the folded portions 12 a and 12 b of the outer layer sheet 12 also correspond to a part of the inner sheet 13. The outer layer sheet 12 and the inner layer sheet 14 are continuous over the ventral side A, the crotch C, and the back side B, respectively. One auxiliary sheet 15 is disposed on each of the dorsal side B and the abdominal side A. The auxiliary sheet 15 covers the inner surface side (the surface side in contact with the elastic member 51) of the folded portions 12 a and 12 b of the outer layer sheet 12.

  The outer layer sheet 12 forms the outer surface of the diaper 1, and the inner layer sheet 14 is disposed on the inner surface side of the outer layer sheet 12 adjacent to the outer layer sheet 12. As illustrated in FIGS. 3 and 4, the auxiliary sheet 15 extends over the upper and lower sides of the end portion 14 w in the longitudinal direction Y of the inner layer sheet 14. In addition, the auxiliary sheet 15 extends over the upper and lower ends of the end portion 10w in the longitudinal direction Y of the absorbent main body 10 in the central portion in the lateral direction X as shown in FIG. Therefore, the auxiliary sheet 15 has a portion facing the inner surface of the outer layer sheet 12, a portion facing the inner surface of the inner layer sheet 14, and a portion facing the inner surface of the absorbent main body 10. The inner surface is a surface that is directed toward the wearer's skin when the diaper 1 or its constituent members are worn.

  As shown in FIG. 1, the outer body 11 has both side edges on the ventral side A and both side edges on the back side B joined to each other, and a pair of side seals S, S is attached to the diaper 1 by the joining. A waist opening 5 formed by the upper edge of the annular waist region and a pair of leg openings 6 and 6 are formed. The waist opening edge W is the periphery of the waist opening 5. In the diaper 1 in the unfolded and extended state, the outer package 11 has an hourglass shape in which the central area in the vertical direction is constricted toward the inner side in the horizontal direction X as shown in FIG.

As shown in FIGS. 2 to 4, the abdominal side A and the back side B of the diaper 1 are respectively in order from the waist opening edge W side to the crotch C side, the waist regions A1, B1, and the upper abdominal region A2. , B2 and lower abdominal regions A3, B3. The ventral side A is a portion from the waist opening edge W on one end side in the longitudinal direction of the diaper 1 to the upper end St of the leg opening 6, and the back side portion B is the waist opening edge on the other end side in the longitudinal direction of the diaper 1. This is a region from W to the upper end St of the leg opening 6.
Hereinafter, the configuration of the waist region A1, the upper abdominal region A2 and the lower abdominal region A3 in the abdominal side A of the diaper 1 will be mainly described with reference to FIGS. 3 and 4, but the waist region B1 in the back side B, The upper abdominal region B2 and the lower abdominal region B3 have the same configuration.

  The waist region A1 extends in the lateral direction of the diaper 1 along the waist opening edge W in the ventral side portion A. A plurality of (6 in the illustrated example) waist elastic members 51 for gathering are fixed to the waist region A1 so as to extend in the lateral direction X of the diaper 1. Moreover, the waist elastic member 51 is being fixed to the inner surface of the outer layer sheet | seat 12 in the state extended in the horizontal direction X of the diaper 1. As shown in FIG.

  The waist elastic member 51 is fixed in an expanded state between the outer layer sheet 12 and the inner sheet 13 sandwiching the waist elastic member 51 via an adhesive. More specifically, some waist elastic members 51 near the waist opening edge W are fixed between the outer layer sheet 12 and the folded portion 12a, and the other waist elastic members 51 are disposed between the outer layer sheet 12 and the auxiliary sheet 15. It is fixed to. Moreover, the waist elastic member 51 is distribute | arranged over the whole region between the side seal parts S and S in each of the ventral part A and the back part B. And in the natural state of the diaper 1, due to the contraction of the waist elastic member 51 fixed in the stretched state, a large number of wrinkles or irregularities are generated in the outer layer sheet 12 and the inner sheet 13, and the waist gather G1 is formed. Yes.

  The lower abdominal region A3 is formed at a position closest to the crotch C in the longitudinal direction Y of the abdominal side A. In the lower abdomen region A3, a plurality of lower abdomen elastic members 91 for gather formation extend in the lateral direction X of the diaper 1 and are fixed. The lower abdomen elastic member 91 is fixed to the inner surface of the outer layer sheet 12 in a state of being extended in the lateral direction X of the diaper 1. Specifically, the lower abdomen elastic member 91 is joined via an adhesive between the outer layer sheet 12 sandwiching the lower abdomen elastic member 91 and the inner layer sheet 14 as the inner sheet 13. And in the natural state of the diaper 1, due to the contraction of the lower abdomen elastic member 91, a large number of wrinkles or irregularities are generated in the outer layer sheet 12 and the inner sheet 13, and the lower abdomen gathers G3, G3 are formed.

  The lower abdomen elastic member 91 is arranged in a state where the lower abdomen elastic member 91 is divided into left and right at the center in the lateral direction X. In other words, the lower abdomen elastic member 91 arranged in the lower abdomen region A <b> 3 exhibits a stretching force on the outer side of both side edges of the absorbent main body 10. On the other hand, even if the lower abdomen elastic member 91 is not disposed in the central portion in the lateral direction X of the portion that overlaps the absorbent main body 10, or even if the lower abdomen elastic member 91 is disposed, the elastic stretchability is not exhibited. Has been made. The method for preventing the lower abdomen elastic member 91 from exhibiting elastic elasticity is not particularly limited, and various known methods can be adopted. For example, a method in which a part of the lower abdomen elastic member 91 is heat-treated so as not to exhibit elastic stretchability, a method in which the lower abdomen elastic member 91 is divided so as to generate a plurality of fragments in which the stretched state is released, and the like. .

  In the upper abdominal region A2 located adjacent to the lower abdominal region A3 and above the lower abdominal region A3, the outer layer sheet 12 and the inner layer sheet 14 are not joined. The upper abdominal region A <b> 2 is a region from the lower end of the waist elastic member 51 to the upper end of the absorbent main body 10. The outer layer sheet 12 and the inner layer sheet 14 are in a non-bonded state, and in the upper abdominal region A2, the thread-like or belt-like upper abdomen elastic member 71 extends in the lateral direction X of the diaper 1 and extends in the lateral direction X. In the state, it extends in the lateral direction X and is fixed to the inner layer sheet 14. As shown in FIGS. 3 and 4, the upper abdomen elastic member 71 is disposed between the inner layer sheet 14 and the auxiliary sheet 15 and is fixed to both sheets. On the other hand, the elastic member for gathering is not fixed to the outer layer sheet 12. For example, an adhesive (not shown) is used to fix the upper abdominal elastic member 71. It is preferable that 2-10 upper abdominal-part elastic members 71 are arranged, More preferably, it is 2-5. In the wearing state of the diaper 1, a large number of wrinkles or irregularities are generated in the inner layer sheet 14 and the auxiliary sheet 15 by the contraction of the upper abdomen elastic member 71, and an inner gather (not shown) is formed. Since the inner gather is located on the inner side of the outer layer sheet 12 that is not joined to the inner layer sheet 14, the inner gather is difficult to visually recognize from the outer surface of the diaper 1. As a result, the outer layer sheet 12 has an underwear-like appearance. Further, as shown in FIG. 1, the outer layer sheet 12 that is not joined to the inner layer sheet 14 in the upper abdominal region A <b> 2 is in a state of bulging toward the outside of the diaper 1 due to contraction of the inner gathers, and is soft. An impression is given to the user, and the appearance is further improved by a synergistic effect with the appearance of the underwear.

  In the diaper 1 of the present embodiment, the portions that come into contact with the wearer's skin when the diaper 1 is worn are the folded portions 12 a and 12 b of the outer layer sheet 12, the auxiliary sheet 15, and the top sheet 2. Of these members, at least the auxiliary sheet 15 is hydrophilized. As shown in FIGS. 3 and 4, the auxiliary sheet 15 directly contacts the wearer's skin at the upper abdominal regions A2 and B2 and the lower abdominal regions A3 and B3 near the upper abdominal regions A2 and B2. Therefore, at least a region (upper abdominal region A2, B2) between the longitudinal end portion of the absorbent main body and the lower edge of the waist region in the auxiliary sheet 15 is due to the auxiliary sheet 15 of sweat generated from the wearer's body. Absorption is possible. In other words, in the auxiliary sheet 15, at least a region between the longitudinal end portion of the absorbent main body and the lower edge of the waist region is a sweat absorbing region R <b> 1 (see FIGS. 3 and 4). In the sweat absorbing region R1, as shown in FIG. 3, when viewed along the thickness direction Z of the diaper 1, the region facing the sweat absorbing region R1 of the outer layer sheet 12 is at least the central region in the lateral direction X of the diaper 1. In FIG. 2, the substantially entire region is in a non-joined state with a member located immediately inside thereof, that is, the inner layer sheet 14, and a space by a non-joined region is formed between them.

  The non-joining area | region where the outer layer sheet | seat 12 and the inner layer sheet | seat 14 are not joined covers substantially the whole region of the center area | region of the horizontal direction X of the diaper 1. FIG. Here, “the central region in the lateral direction X” means that each of the left and right sides of the ventral portion A and the dorsal portion B is 1/5 of the left and right when the lateral direction X is divided into five equal parts in the expanded and extended state. This means a three-fifth area of the central area excluding the area. The “substantially the entire area” means an area (area) of 85% or more of the central area. In the diaper 1 of the present embodiment, when the outer layer sheet 12 and the inner layer sheet 14 are joined in the three-fifth region of the central region with respect to the entire width between the side seal portions S, S, the area standard is 15. %, Particularly 10% or less, more preferably 5% or less.

  And in the outer layer sheet 12 in the upper abdominal region A2, the waist region A1 and the lower abdomen region A3 contract in the width direction X, that is, the waist gather G1 and the lower abdomen gather G3 contract, as shown in FIG. As a result, a three-dimensionally raised portion F (hereinafter referred to as a floating portion F) is generated outside the diaper 1. In the floating portion F, a plurality of ridges 16 are formed as shown in FIG. In the heel 16 formed in the upper abdominal region A2, the cross-sectional shape along the lateral direction X of the diaper has a continuous wave shape as shown in FIG. Further, the heel 16 extends substantially along the vertical direction Y when the abdominal side A is viewed from each outer surface side. Strictly speaking, the heel 16 is slightly inclined so as to approach the central portion side in the width direction X from the lower side to the upper side. Further, the heel 16 of the upper abdominal region A2 has a portion that is wider than the waist gather G1 and the lower abdominal gather G3. Thus, in the outer layer sheet 12, in the thickness direction Z of the diaper, the upper and lower positions sandwiching the central region of the longitudinal direction Y in the region facing the sweat-absorbing region R1, that is, at least one of the waist region A1 and the lower abdominal region A3, Gathers G1 and G3 extending in the lateral direction X are formed, and a plurality of ridges 16 extending in the vertical direction are formed on the outer layer sheet 12 corresponding to the sweat-absorbing region R1 by the gathers G1 and G3.

  According to the diaper 1 of the present embodiment having the above-described configuration, the sweat absorbing region R1 is formed on the skin contact surface of the wearer, and the region corresponding to the sweat absorbing region R1 in the thickness direction Z of the diaper 1 In the upper abdominal region A2, the outer layer sheet 12 and the inner layer sheet 14 are in a non-joined state in the central region in the width direction, and the floating portion F and the heel 16 are formed, so that it arises from the wearer's body. The perspired sweat is quickly absorbed by the sweat-absorbing region R1, and the absorbed sweat is smoothly evaporated to the outside of the diaper 1 through the inner layer sheet 14 and the outer layer sheet 12. Therefore, the stuffiness inside the diaper 1 in a worn state can be effectively prevented, and skin troubles can be effectively prevented. From the viewpoint of exerting such an effect, the sweat absorption region R1 has a length between the waist opening end and the leg opening end (that is, the total length in the Y direction of the side seal 4 of the abdomen A). It is preferable to have a length in the Y direction of 15 to 70%, particularly 20 to 50%. Further, in this case, the corresponding upper abdominal region A2 is preferable from the viewpoints of giving an underwear-like and soft appearance, and suppressing the slipping off and suppressing the waistline gently and firmly. Moreover, since the area | region which swells becomes moderate, the effect which gives a wearer visually that it is hard to give a wearer's impression to a wearer, and has elasticity.

  Whether or not the heel 16 described above is caused by contraction of the waist region A1 and the lower abdomen region A3 in the lateral direction X (or whether it is caused by the waist gather G1 and the lower abdomen gather G3). Ka), for example, when the elastic member 71 fixed to the inner sheet 13 (inner layer sheet 14 or the like) in the upper abdominal region A2 is removed or cut at a number of locations so as not to exhibit elastic stretchability. It can be determined whether or not the shape of the ridge 16 is maintained as it is. Further, in the case where the elastic member 71 does not exist, when the waist region A1 and the lower abdomen region A3 are extended to the maximum length and the gathers in the region disappear, the upper abdomen region A2 has almost disappeared. The wrinkles can be determined to be caused by the contraction of the waist region A1 and the lower abdomen region A3 (or caused by the waist gather G1 and the lower abdomen gather G3). The “maximum length” refers to the length when the sheet material constituting the outer package 11 is stretched to the maximum under conditions that do not cause destruction (material destruction).

  The above-described sweat-absorbing region R1 (in this embodiment, a region corresponding to the upper abdominal region A2 of the auxiliary sheet 15) is hydrophilic. In the present invention, hydrophilic means that the contact angle of water is 90 ° or less. When the contact angle of the sweat-absorbing region R1 is preferably 85 ° or less, more preferably 80 ° or less, the speed and area for absorbing sweat are increased, and the anti-steaming effect is further enhanced. In addition, the measuring method of a contact angle is performed by the method of Unexamined-Japanese-Patent No. 2010-168715 paragraph [0057].

  The member (the auxiliary sheet 15 in this embodiment) constituting the sweat-absorbing region R1 can be made of a hydrophilic material such as pulp. For example, paper can be used. Alternatively, a water repellent material that has been subjected to a hydrophilic treatment can also be used. Use of the latter is preferable because the absorbed sweat is not retained in the sweat-absorbing region R1 and is easily released to the outside as vapor. The water repellent material means a material having the above-mentioned contact angle exceeding 90 °. Examples of the water repellent material include a fiber sheet made of a synthetic resin such as a nonwoven fabric. A known method can be used as the hydrophilic treatment. For example, the method of processing with a hydrophilizing agent, the method of plasma processing, etc. are mentioned. From the viewpoint of simplicity, a method of treating with a hydrophilizing agent is preferable. Examples of the hydrophilizing agent include surfactants, ceramides and ceramide-like substances.

  As the surfactant used for the hydrophilic treatment of the water repellent material, a cationic surfactant and an amphoteric surfactant are preferable. These surfactants can impart effective hydrophilicity even in a small amount, and can also provide antibacterial and deodorant properties, and can suppress rough skin and odor generation when worn for a long time. Because it becomes. As the cationic surfactant, a quaternary ammonium salt represented by the following formula (1) is preferable. As the amphoteric surfactant, those represented by the following formulas (2) and (3) are preferable.

  As ceramide, natural and synthetic ceramide substances can be used. As the ceramide-like substance, a compound represented by the formula (4) can be preferably used.

[Wherein R ⁶ represents a linear or branched hydrocarbon group having 1 to 12 carbon atoms which may be substituted by a hydroxyl group and / or an alkoxy group, and R ⁷ represents a linear or branched chain having 1 to 5 carbon atoms. A branched divalent hydrocarbon group is represented, and R ⁸ represents a linear or branched divalent hydrocarbon group having 1 to 22 carbon atoms. ]

  In the diaper 1 described above, the top sheet 2, the back sheet 3, the absorber 4, the side cuff 8 forming sheet, and the like are particularly limited to various types conventionally used for absorbent articles such as disposable diapers. Can be used. For example, as the surface sheet 2, a single layer or multilayer nonwoven fabric, an apertured film, or the like can be used. As the back sheet 3, a resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used. As the absorbent body 4, an absorbent core made of an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core made to hold particles of a water-absorbing polymer is made of tissue paper or the like. Those coated with a core wrap sheet can be used.

  In addition, as the outer layer sheet 12 and the inner layer sheet 14, various sheet materials conventionally used for absorbent articles such as disposable diapers can be used without any particular limitation. It is preferable to use a material such as a nonwoven fabric. The outer layer sheet 12 and the inner layer sheet 14 may be water-repellent or hydrophilic, but at least one of them is preferably water-repellent from the viewpoint of preventing liquid oozing. As the nonwoven fabric, various nonwoven fabrics such as an air-through nonwoven fabric, a spunbond nonwoven fabric, a spunlace nonwoven fabric, a melt blown nonwoven fabric, and a heat roll nonwoven fabric are preferably used as a single layer or a laminated nonwoven fabric in which these are laminated in two or more layers. . Moreover, the sheet | seat etc. which integrated the nonwoven fabric and the moisture-permeable film film can also be used as the outer layer sheet 12 and the inner layer sheet 14.

  Examples of the material for forming the elastic members 51, 61, 71, 81, 91 include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As the form of the elastic member, a thread-like (thread rubber etc.) or a strip (flat rubber etc.) having a rectangular, square, circular, elliptical or polygonal cross section, a multifilament type thread-like one, etc. is preferable. Can be used. The thickness of the elastic members 51, 61, 71, 81, 91 is preferably 470 to 1670 dtex, particularly 620 to 940 dtex. In particular, the elastic member 71 in the upper abdominal region has a thickness of 620 to 1670 dtex from the viewpoint of both the feeling of wearing and the suppression of slipping, and the elastic member 91 in the lower abdominal region has both a feeling of wearing and suppression of falling off. From the viewpoint of giving a clean appearance, it is preferable to use a material having a thickness of 470 to 680 dtex. It is preferable that the arrangement | positioning space | interval of the waist elastic member 51 shall be 1-15 mm, especially 2-10 mm. It is preferable that the arrangement | positioning space | interval of the upper abdominal part elastic member 71 shall be 2-40 mm, especially 3-30 mm. It is preferable that the arrangement | positioning space | interval (length of the vertical direction Y of the non-joining area | region N) of the lower abdominal part elastic member 91 shall be 5-25 mm, especially 8-15 mm.

  Next, second to fourth embodiments of the present invention will be described with reference to FIGS. Regarding these embodiments, differences from the first embodiment will be described, and the explanations detailed with respect to the first embodiment will be appropriately applied to points that are not particularly described. 6 to 8, the same members as those in FIGS. 1 to 5 are denoted by the same reference numerals. 6 to 8, the structure of the ventral side A of the diaper 1 is shown and the structure of the dorsal side B is not shown, but the structure of the dorsal side B is the same as that of the ventral side A. It is the same. Alternatively, the structure of the back side portion B in the first embodiment may be adopted instead.

  In the second embodiment shown in FIG. 6, the upper abdomen elastic member is not disposed in the upper abdomen region A2. Furthermore, the end portion 14w in the longitudinal direction Y of the inner layer sheet 14 does not extend to the sweat absorbing region R1, but terminates in the vicinity of the position of the end portion 10w in the longitudinal direction Y of the absorbent main body 10. Instead of disposing the elastic member, in the present embodiment, the auxiliary sheet 15 has elasticity. Further, the auxiliary sheet 15 has hydrophilicity as in the first embodiment. The stretchability of the auxiliary sheet 15 is preferably expressed in at least the lateral direction X of the diaper 1. More preferably, it is expressed in two directions of the horizontal direction X and the vertical direction Y, and more preferably, it is expressed in all directions within the XY plane including the horizontal direction X and the vertical direction Y. The auxiliary sheet 15 having elasticity may be incorporated into the diaper 1 in its natural state (relaxed state), or may be incorporated into the diaper 1 in an expanded state. When the auxiliary sheet 15 is incorporated in the diaper 1 in an extended state, a gather is formed on the skin contact surface of the diaper 1 by the contraction of the auxiliary sheet 15.

  The auxiliary sheet 15 having elasticity is, for example, (i) composed of one sheet material, (ii) composed of a laminate of a plurality of sheet materials, or (iii) one sheet or a plurality of sheets. And a composite of one or a plurality of thread-like or belt-like elastic members.

  When the auxiliary sheet 15 is (i), one sheet material includes an elastic material such as an elastic resin and has elasticity. Examples of such an auxiliary sheet 15 include a nonwoven fabric or a woven fabric containing elastic fibers, or a film containing an elastic resin.

  In the case of (ii), at least one of the plurality of sheet materials includes an elastic material such as an elastic resin and has stretchability, and the other sheet materials have at least stretchability. As such an auxiliary sheet 15, for example, a substantially non-elastic non-elastic fiber layer is disposed on at least one surface of the elastic fiber layer, and both fiber layers are in a state in which the constituent fibers of the elastic fiber layer maintain the fiber form. In a state where all the fibers of the non-elastic fiber layer are joined by heat-sealing at the fiber intersection, and / or a part of the constituent fibers of the elastic fiber layer are inelastic fibers. Examples include stretchable nonwoven fabric that is in a state of entering a layer. Examples of such stretchable nonwoven fabric include those described in Japanese Patent Application Laid-Open No. 2007-138374 related to the earlier application of the present applicant.

  In the case of (iii), one or a plurality of elastic members are joined to one surface of one sheet material or between two sheet materials to constitute the auxiliary sheet 15. In the case of (iii), the elastic member is joined in a stretched state to a sheet material that does not have stretchability and extensibility, and the elastic member is in a natural state (relaxed state) in at least the stretchable sheet material. In the present invention, any form can be used. As the auxiliary sheet 15 having the latter form, a large number of elastic filaments arranged so as to extend in one direction without crossing each other are bonded to a nonwoven fabric that can be stretched over their entire length in a substantially non-stretched state. The elastic sheet which becomes. Examples of such a stretchable sheet include those described in Japanese Patent Application Laid-Open No. 2008-179128 related to the earlier application of the present applicant.

  According to the diaper of the present embodiment, in addition to the effect produced by the diaper of the first embodiment, the effect that sweat transpiration is performed more smoothly is produced. This is because, in the thickness direction Z of the diaper 1, the number of sheet materials constituting the region corresponding to the sweat-absorbing region R1 is smaller than that in the first embodiment.

  The third embodiment shown in FIG. 7 is different from the first embodiment in the structure of the waist portion A1. In the first embodiment, as shown in FIG. 3, the auxiliary sheet 15 covers the inner surface side (the surface side in contact with the elastic member 51) of the folded portions 12 a and 12 b of the outer layer sheet 12. In the embodiment, the auxiliary sheet 15 covers the outer surface side (skin contact surface side) of the folded portions 12 a and 12 b of the outer layer sheet 12. Therefore, in this embodiment, the whole area of the auxiliary sheet 15 is a skin contact surface of the diaper 1. The entire area of the auxiliary sheet 15 is hydrophilic. According to the present embodiment, since the auxiliary sheet 15 having hydrophilicity has a larger area as a skin contact surface than the first embodiment, sweat generated from the wearer's body can be further absorbed. However, the region where the sweat absorbed by the auxiliary sheet 15 is mainly evaporated to the outside is a region corresponding to the sweat-absorbing region R1 in the outer layer sheet 12 as in the first embodiment.

  The fourth embodiment shown in FIG. 8 also differs from the first embodiment in the structure of the waist portion A1. In the first embodiment, as shown in FIG. 3, the outer layer sheet 12 and the auxiliary sheet 15 are opposed to each other with the elastic member 51 interposed therebetween, and both the sheets 12 and 15 are indirectly joined via the elastic member 51. On the other hand, in this embodiment, the elastic member is not disposed between the outer layer sheet 12 and the auxiliary sheet 15, and the sheets 12 and 15 are not joined. Furthermore, in this embodiment, the elastic member 51 is disposed between the auxiliary sheet 15 and the folded portion 12 a of the outer layer sheet 12. The elastic member 51 is joined to the auxiliary sheet 15 and the folded portion 12a by an adhesive (not shown).

  In the wearing state of the diaper 1, the elastic member 51 contracts, so that a large number of wrinkles or irregularities are generated in the folded portion 12 a of the auxiliary sheet 15 and the outer layer sheet 12, and a gather (not shown) is formed. Since the gather is located inside the outer layer sheet 12 that is not joined to the auxiliary sheet 15, the gather is difficult to visually recognize from the outer surface of the diaper 1. Furthermore, in the diaper 1 of the present embodiment, as in the first embodiment, the gathers formed in the upper abdomen elastic region A2 are also difficult to visually recognize from the outer surface of the diaper 1. As a result, in the diaper 1, with respect to the longitudinal direction Y, it is difficult for the gathers to be visually recognized from the outer surface of the diaper 1 from the waist part A1 to the upper abdomen area A2. Therefore, according to the diaper 1 of the present embodiment, in addition to the effect exhibited by the diaper of the first embodiment, the effect that the appearance becomes more underwear-like is exhibited. Moreover, when the folding | returning part 12a is made hydrophilic in waist area | region A1, the moisture discharge | release in the diaper 1 will increase more combined with the non-joining state of the outer layer sheet | seat 12 and the auxiliary sheet | seat 15 in the said area | region. At this time, the description of the non-joined state in the upper abdominal part A2 is applied to the non-joined state in the waist region A1.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in each of the above-described embodiments, the sweat absorbing region R1 is formed on both the ventral portion A and the dorsal portion B, and the outer layer sheet 12 located at a position corresponding to the sweat absorbing region R1 is immediately Although it was in a non-joined state with the member located on the inner side, this configuration only needs to be satisfied at least on the ventral side A, and a configuration different from the ventral side A may be adopted for the back side B. . Further, a disposal tape for maintaining the diaper after use in a predetermined disposal shape may be disposed on the surface of the outer layer sheet 12 of the back side portion B.

  Moreover, although the said embodiment is an example which applied this invention to the underpants type disposable diaper, this invention is applicable similarly to other wearing articles, for example, a shorts type sanitary napkin.

Example 1
The underpants diaper of the structure shown by FIGS. 1-3 was produced. For the outer layer sheet 12, the inner layer sheet 14, and the auxiliary sheet 15 constituting the upper abdominal region A2, a water-repellent spunbonded nonwoven fabric (made of polypropylene, basis weight 18 g / m ² , contact angle greater than 90 °) is used. Only a hydrophilization treatment with a surfactant was performed so that the contact angle was 82 °. A rubber thread having a thickness of 1240 dtex was used for the upper abdomen elastic member 71, and it was bonded and fixed between the auxiliary sheet and the inner layer sheet at an elongation rate of 270% by applying an adhesive only to the elastic member. Using the sample cut out so as to include the waist region A1, the upper abdomen region A2 and the lower abdomen region A3, the following vapor release properties were evaluated. The results are shown in Table 1.

(Evaluation method for vapor release)
For the measurement, a precise rapid thermophysical property measuring apparatus Thermolab IIB (model number: KES-F7) manufactured by Kato Tech Co., Ltd. was used. A sample conditioned for 24 hours under conditions of 23 ° C. and 55% RH is placed on a sample stage heated to 33 ° C. Using a tube inserted between the sample stage and the sample, 0.1 mL of 0.9 mass% physiological saline is supplied to the sample. A wind tunnel is arranged on the upper surface of the sample, and an air flow is given to the sample at a wind speed of 0.3 m / sec. On the upper surface of the sample, the change in heat flow rate before the physiological saline injection is continuously measured. As shown in FIG. 9, the point at which the amount of heat greatly increased is due to the injection of physiological saline, and then the steam is released to the upper surface side of the sample, whereby the heat flow rate decreases. The time point at which the amount of heat release reaches the value immediately before the injection of physiological saline is regarded as a complete release state, and the time from the time when the heat flow rate is increased due to the physiological saline injection to the complete release state is evaluated as the complete release time. And it evaluates that vapor | steam discharge | release property is so favorable that complete discharge | release time is short.

(Comparative Examples 1 and 2)
In Example 1, the outer layer sheet 12 and the inner layer sheet 14 in the upper abdominal region A2 were bonded and fixed on substantially the entire surface, and the auxiliary sheet 15 was not subjected to the hydrophilization treatment. The inner layer sheet for the diapers of Comparative Example 1 and Comparative Example 1 A sample in which only 14 was subjected to a hydrophilization treatment was used as Comparative Example 2, and the vapor release property was evaluated in the same manner as in Example 1. The results are shown in Table 1.

  As shown in the results of Table 1, according to the diaper of the first embodiment (product of the present invention), the steam inside the diaper can be quickly released to the outside.

1 Pants-type disposable diapers (wear items)
2 Top sheet 3 Back sheet 4 Absorber 5 Waist opening 6 Leg opening 10 Absorbent body 11 Exterior body 12 Outer sheet 13 Inner sheet 14 Inner sheet 15 Auxiliary sheet 71 Upper abdominal elastic member A Abdominal side B Back side C Crotch A1, B1 Waist area A2, B2 Upper abdominal area A3, B3 Lower abdominal area

Claims (6)

It has an abdominal side and a dorsal side and a crotch located between them, and has a longitudinal direction extending through the crotch from the abdominal side to the dorsal side, and a lateral direction orthogonal thereto, and is worn In the wearing article which comprises a waist opening and a pair of leg openings formed by the upper edge of the annular waist region,
The article comprises an outer layer sheet that forms the outermost surface of the article, a liquid-permeable surface sheet, a back sheet, and an absorbent main body having an absorbent body interposed therebetween, inside the outer layer sheet, Furthermore, a hydrophilic sweat-absorbing region that comes into contact with the wearer's skin when the article is worn is provided between the longitudinal end of the absorbent main body and the lower edge of the waist region,
Of the outer layer sheet, the region facing the sweat-absorbing region in the thickness direction of the wearing article is in a non-joined state with a member located substantially inside the entire region in the central region in the lateral direction of the article. , Wear articles.   The wearing article according to claim 1, wherein the sweat-absorbing region is rendered hydrophilic by hydrophilizing the water-repellent material.   The wearing article according to claim 1 or 2, wherein the sweat-absorbing region has elasticity.   The wearing article according to claim 3, wherein the sweat-absorbing region comprises an elastic sheet having two sheets and an elastic member joined in an extended state between the sheets.   The wearing article according to claim 3, wherein the sweat-absorbing region is made of a stretchable nonwoven fabric.   The outer layer sheet is formed with gathers extending in the lateral direction of the article in at least one of the upper and lower positions sandwiching the longitudinal central area of the article in a region facing the sweat-absorbing region in the thickness direction of the worn article. The wearing article according to any one of claims 1 to 5, wherein a plurality of longitudinally extending wrinkles are formed in the outer layer sheet corresponding to the sweat-absorbing region by the gathers.