JP5091064B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article including an absorbent body, a top sheet, and a back sheet. More specifically, the present invention relates to an absorbent article provided with an exhaust mechanism that discharges moisture remaining between the absorbent article and the skin of the wearer to the outside.

  In general, absorbent articles such as disposable diapers and urine pads are composed of an absorbent body, a top sheet at least partially made of a liquid-permeable material, and arranged to cover the surface of the absorbent body, and a liquid-impermeable material. And a back sheet disposed so as to cover the back surface of the absorber.

  Such an absorbent article is used so that the top sheet comes into contact with the wearer's skin, and excrement passes through the liquid-permeable portion of the top sheet and is absorbed and held by the absorbent body. And the excrement is prevented from leaking outside by the liquid-impermeable back sheet disposed on the back side of the absorber.

  By the way, when the absorbent article is worn, moisture generated from urine, sweat, body fluid or the like tends to stay between the absorbent article and the wearer's skin. This moisture is not preferable because it causes skin troubles such as rash and causes discomfort such as stuffiness and stickiness.

  In view of this, various proposals have been made in order to discharge moisture that remains in the space between the absorbent article and the skin of the wearer to the outside and to reduce the humidity inside the absorbent article. For example, a back sheet material, a leak-proof sheet, and the like using a film in which a large number of fine holes are formed have been proposed (see Patent Documents 1 and 2). In addition, an absorbent article in which a hygroscopic material sealed with a hygroscopic agent is disposed between the top sheet and the absorbent body has also been proposed (see Patent Document 3).

Japanese Patent Laid-Open No. 11-348163 JP 2007-020664 A JP 2003-116912 A

  The back sheet material described in Patent Document 1 and the leak-proof sheet described in Patent Document 2 can improve moisture permeability while preventing leakage by a large number of fine holes formed in the film. Moisture between the article and the wearer's skin can be discharged to some extent. However, these inventions are limited to those that improve the moisture permeability while securing the leak-proof property, which is the inherent performance of the backsheet material and the like. Therefore, there is a limit to the improvement of moisture permeability, and the current situation is that the moisture staying between the absorbent article and the wearer's skin cannot be efficiently discharged.

  Moreover, the absorbent article described in Patent Document 3 can be expected to reduce the humidity between the absorbent article and the wearer's skin by absorbing moisture using a hygroscopic agent. However, the method of absorbing moisture with a hygroscopic agent leaves a problem to be solved in that moisture cannot be removed promptly.

  The present invention provides an absorbent article that can efficiently and promptly discharge moisture remaining between the absorbent article and the wearer's skin and that can be worn comfortably.

  As a result of intensive studies in order to solve the problems of the prior art as described above, the inventor is made of a sheet material, and a hole through which moisture can pass is formed on both the first side surface and the second side surface. A tubular partition wall (tubular partition wall) was provided along at least the edge of the back body. And the deformation | transformation of the tubular partition accompanying a wearer's operation | movement is utilized, and the moisture which retains between an absorbent article and a wearer's skin is actively discharged | emitted outside the absorbent article with a pump-like exhaust mechanism. As a result, the inventors have conceived that the above-mentioned problems can be solved and completed the present invention. Specifically, the following absorbent articles are provided by the present invention.

[1] A top sheet that is composed of parts of a front body, a crotch part, and a back body, is composed of an absorbent body, at least a part is made of a liquid-permeable material, and covers the surface of the absorbent body; A backsheet made of an impermeable material, arranged to cover the back surface of the absorber, and a sheet material, presenting a tubular shape with an internal space partitioned from the outside, on the top side, A tubular partition wall to which a standing stretchable material stretched in the direction of forming the internal space is fixed, and the tubular partition wall has one side edge of the sheet material attached to a part of the sheet material. The tubular space has a hollow tubular structure in which the internal space is formed by combining them, and two opposite side surfaces are formed on both sides of the standing stretchable material, On the side of the A first hole that communicates the internal space and the external space is formed, and a second hole that communicates the internal space and the external space is also formed on the second side surface. The end of the back body such that the first side surface and the first hole are oriented toward the crotch part side, and the second side surface and the second hole are oriented toward the edge side of the back body. Absorbent articles arranged along the edges.

[2] The tube-shaped partition wall includes a first tube-shaped partition wall and a second tube-shaped partition wall. The first tube-shaped partition wall includes the first side surface and the first hole formed in the crotch portion. Is arranged along the edge of the back body so that the second side surface and the second hole are oriented toward the edge of the back body, An edge of the front body such that the first side surface and the first hole are oriented toward the crotch part side, and the second side surface and the second hole are oriented toward the edge side of the front body. The absorbent article according to [1], which is disposed along the line.

[3] The tubular partition wall has a tubular outer shell portion that forms the internal space, and a tongue portion that extends into the inner space. The stretchable material for standing up is located in the tongue portion. The absorbent article according to [1] or [2], wherein is fixed.

[4] The absorbent article according to [ 3], wherein the outer shell portion and the tongue portion are formed of an integral sheet material.

[5] An outer sheet formed of a sheet material and having a pants shape in which one waist opening and a pair of leg openings are formed; and a pad shape in which the absorber is included; An absorbent main body fixed to the inner surface side, and the outer sheet is configured by bonding the sheet material with an inner sheet disposed on the inner surface and an outer sheet disposed on the outer surface, An elastic material around the waist in the stretched state is fixed to a portion around the waist of the exterior sheet, and a stretched state between the inner sheet and the outer sheet is placed around the belly portion of the exterior sheet. An abdomen elastic material is fixed, and the absorbent main body is a pants-type use in which the absorbent body, the top sheet, and the back sheet are formed in an integrated pad shape. The absorbent article according to any one of the which is discarded diaper [1] to [4].

[6] At least one of the front end portion and the rear end portion of the exterior sheet is folded back inward from the edge around the waist of the diaper to form a folded portion, and constitutes the folded portion. The absorbent article according to [5], wherein the tubular partition is formed of a sheet material.

[7] In the above [6], the folded portion is formed by a laminated portion of the inner sheet and the outer sheet, and the tubular partition is formed by a laminated portion of the inner sheet and the outer sheet. The absorbent article as described.

[8] The inner sheet and the outer sheet are bonded so that the end of the other sheet protrudes from at least one of the front edge and the rear edge of one sheet to form a single layer portion. And at least a part of the single-layer portion is folded inside a diaper to form a folded portion, and the folded portion covers the one end of the absorbent main body so as to cover one end of the absorbent main body. It is bonded to the surface of the sheet and the top sheet,
The absorbent article according to [5], wherein the tubular partition is attached to the surface of the folded portion.

[9] The inner sheet and the outer sheet are bonded so that the end of the other sheet protrudes from at least one of the front edge and the rear edge of one sheet to form a single layer portion. And at least a part of the single-layer part is folded back inside the diaper to form a folded part, and the folded part is configured such that a part of the folded part covers one end of the absorbent main body. The absorbent article according to [5], wherein the absorbent article is bonded to the surfaces of the inner sheet and the top sheet and the other part forms the tubular partition.

[10] The absorptivity according to any one of [5] to [9], wherein the tubular partition is arranged in a portion around the waist of the exterior sheet instead of the elastic material around the waist of the exterior sheet. Goods.

[11] The inner sheet and the outer sheet are bonded so that the end of the other sheet protrudes from at least one of the front edge and the rear edge of one sheet to form a single layer portion. And at least a part of the single-layer portion is folded inside a diaper to form a folded portion, and the folded portion covers the one end of the absorbent main body so as to cover one end of the absorbent main body. The outer sheet is bonded to the surface of the sheet and the top sheet, and the crotch part and the abdomen circumference part are configured by bonding the inner sheet and the outer sheet, and the waist circumference part is The absorbent article according to [10], wherein the single layer portions are bonded to each other.

[12] The absorbent article according to any one of [5] to [11], wherein the tubular partition wall is disposed in at least one abdominal area of the front body and the back body of the absorbent article.

[13] The above-mentioned [5] to [11], wherein the tubular partition is arranged so as to cover at least one of the waist and abdomen portions of the front body and the back body of the absorbent article. The absorbent article in any one.

  The absorbent article of the present invention can efficiently and quickly discharge moisture remaining between the absorbent article and the wearer's skin, and can be comfortably worn.

  Hereinafter, the best mode for carrying out the absorbent article of the present invention will be specifically described with reference to examples of a tape-type disposable diaper and a pants-type disposable diaper. However, the present invention broadly encompasses absorbent articles (for example, urine pads and the like) having the invention-specific matters, and is not limited to the following embodiments.

  For convenience of drawing, in FIG. 7A, the drawing was performed in a form in which the elastic material around the belly was discarded. Moreover, in FIG. 7B and the figure in FIGS. 8-11, the x mark shows the junction part by a hot-melt-adhesive.

[1] Definitions etc .:
The “tape-type disposable diaper” includes an absorbent body 22, a top sheet 18, and a back sheet 20 as in the absorbent article 1 </ b> A shown in FIGS. 1A and 1B, and left and right side edges of the back body 6. The disposable diaper further provided with the fastening tape 11 which fixes the front body 2 and the back body 6 arrange | positioned so that it may extend from 6a, 6b shall be meant.

  The “front body” is a portion that covers the abdomen (front of the body) of the wearer when the absorbent article is attached to the wearer, such as the absorbent article 1A shown in FIG. 1A (reference numeral 2 in the figure). , "Crotch" is the part that covers the crotch of the wearer when the absorbent article is worn on the wearer (reference numeral 4 in the figure), and the "back body" is the wearer wearing the absorbent article When it does, it shall mean the part which covers a wearer's back side (back of the body) (symbol 6 in a figure).

  The “pants-type disposable diaper” is made of a sheet material, for example, like the absorbent article 1F shown in FIGS. 7A to 7E, and includes one waist opening 10 and a pair of leg openings 12. A pants-shaped exterior sheet 16 and a pad shape in which an absorber 22 is included, and an absorbent main body 14 fixed to the inner surface side of the exterior sheet 16.

  In the pants-type disposable diaper 1 </ b> F, the outer sheet 16 is configured such that the sheet material is formed by laminating an inner sheet 16 a disposed on the inner surface and an outer sheet 16 b disposed on the outer surface. Is stretched around the waist between the outer sheets 16 (in this example, between the inner sheet 16a and the outer sheet 16b). The stretchable belly stretchable material 44 is fixed between the layers 16a and 16b. The absorbent main body 14 is configured in a pad shape in which the absorbent body 22, the top sheet 18, and the back sheet 20 are integrated.

[2] Configuration of the absorbent article of the present invention:
The absorbent article of the present invention, like the absorbent article 1A shown in FIGS. 1A and 1B, is formed of a sheet material 70, 76 and has a tubular shape in which an internal space 60 partitioned from the outside is formed. The tube-shaped partition wall 62A is provided with a standing stretchable material 64 that is stretched in the direction in which the internal space 60 is formed. The tubular partition wall 62A is opposed to both sides of the stretchable material 64 for standing. The first side surface 66 is formed in the first side surface to communicate the internal space 60 and the external space, and the second side surface also communicates the internal space 60 and the external space. A second hole 68 is formed. In the tubular partition wall 62A, the first side surface and the first hole 66 are oriented toward the crotch 4 side, and the second side surface and the second hole 68 are the back body 6. The edge 6c of the back body 6 is oriented so as to be oriented toward the edge 6c. In which are arranged along.

  In such a configuration, moisture generated from urine or body fluid and staying between the absorbent article (mainly the top sheet 18) and the wearer's skin passes through the first hole 66 to the internal space 60 of the tubular partition wall 62. Get in. On the other hand, outside air enters the internal space 60 of the tubular partition wall 62 from the second hole 68. Moisture and outside air are mixed in the internal space 60 of the tubular partition wall 62 and then discharged from the first hole 66 and the second hole 68. Further, since the tubular partition wall 62A formed by the sheet materials 70 and 76 is easily deformed by the wearer's movement, the moisture that has entered the internal space 60 of the tubular partition wall 62 from the first hole 66 is absorbed by the wearer. When the tubular partition wall 62A is crushed by the operation, it is discharged from the first hole 66 and the second hole 68. Then, when the tubular partition wall 62 recovers from the collapsed state to the tubular structure, the first hole 66 again sucks moisture inside the diaper, and the second hole 68 sucks outside air. That is, the moisture can be positively exhausted to the outside of the absorbent article 1A by an exhaust mechanism similar to a pump.

  If such an exhaust mechanism is used, the amount of moisture discharged can be made larger than when a microporous back sheet is used, and the effect is manifested in a shorter time than a method of absorbing moisture with a hygroscopic agent. Is done. That is, moisture that remains between the absorbent article and the skin of the wearer can be discharged quickly and efficiently, so that skin troubles such as rashes and uncomfortable feelings such as stuffiness and stickiness are less likely to occur. Can be worn comfortably.

  The absorbent article 1A shown in FIGS. 1A and 1B is an example in which the present invention is applied to a tape-type disposable diaper. For example, as shown in FIGS. 7A and 7B, the present invention is applied to a pants-type disposable diaper. It can also be applied. The absorbent article 1F is made of a sheet material 70 and has a tubular shape in which an internal space 60 partitioned from the outside is formed. On the top side, the elastic material 64 for standing is stretched in the direction in which the internal space 60 is formed. Is fixed to the tubular partition wall 62F. Two opposing side surfaces are formed on both sides of the standing elastic member 64, and the internal space 60 and the external space are formed on the first side surface. Are formed, and a second hole 68 is also formed on the second side surface so as to communicate the internal space 60 and the external space. And the first hole 66 on the edge 6c of the back body 6 so that the second side and the second hole 68 are oriented on the edge 6c side of the back body 6. It is arranged along.

[2-1] Tubular partition:
As shown in FIGS. 1A and 1B, the tubular partition wall 62A is formed of a sheet material 70, 76, has a tubular shape in which an internal space 60 partitioned from the outside is formed, and the internal space 60 is formed on the top side thereof. This is a member to which a standing stretchable material 64 that is stretched in the direction is fixed.

[2-1A] Material:
The “sheet material” is preferably a sheet material that is easily deformable in order for the exhaust mechanism to function. Moreover, if it is comprised with the sheet material which consists of a water repellent material and a liquid-impermeable material, it is also possible to provide the same effect as a three-dimensional gather. Examples of such a sheet material include a nonwoven fabric produced by a method such as card embossing and spunbond, a nonwoven sheet with high waterproofness such as SMS and SMMS, and a liquid-impermeable film made of a resin such as polyethylene. Can do. Moreover, a perforated nonwoven fabric can also be used partially.

  However, the tubular partition wall does not necessarily need to be made of a water-repellent material or a liquid-impermeable material. For example, the tubular partition may be formed of a material having weak hydrophilicity. When the tube-shaped partition wall is formed of such a material, the wearer's sweat and the like are absorbed, and skin troubles caused by sweat and the like remaining on the surface of the tube-shaped partition wall can be prevented, which is preferable.

[2-1B] Tubular structure:
As shown in FIG. 1B, the tubular partition wall 62A is a member having a tubular shape in which an internal space 60 partitioned from the outside is formed. “Partitioned from the outside” is only required to have a structure in which the internal space of the tubular partition wall and the outside can be recognized with the sheet material as a boundary, and the space is partitioned in an airtight or liquid tight manner. There is no need. For example, in the absorbent article 1A shown in FIG. 1B, the first hole 66 and the second hole 68 are formed in the sheet materials 70 and 76 constituting the tubular partition wall 62A, and the internal space 60 and the external space communicate with each other. Is in a state. However, the inner space 60 and the outer space of the tubular partition wall 62A can be clearly recognized with the sheet materials 70 and 76 as a boundary.

  In the absorbent article of the present invention, as shown in FIG. 1B, the tubular partition wall 62A is composed of a plurality of sheet materials 70, 76, and the plurality of sheet materials 70, 76 are at least of the tubular partition wall 62A. It is preferable that the top part is laminated with each other to form a laminated part, and the standing stretchable material 64 is fixed in an extended state between the layers of the laminated part. By adopting such a structure, the tubular partition can be sufficiently fitted to the wearer's skin, and the operation of the wearer's waist can be used for deformation of the tubular partition (and thus the internal space) without loss. it can. Therefore, the internal space can be actively compressed and restored, and the moisture exhaust performance can be improved.

  The tubular partition wall 62A shown in FIGS. 1A and 1B can be manufactured by a method as shown in FIG. 1D, for example. First, as shown in FIG. 4A, the sheet material 70 and the sheet material 76 are bonded so as to partially overlap each other. At this time, the stretchable upright stretchable material 64 is sandwiched and fixed between the sheet materials 70 and 76. Moreover, in order to prevent peeling, the joining part 82 is formed in the laminated part of the sheet materials 70 and 76 by heat sealing. Thereafter, a first hole 66 is formed in a portion composed only of the sheet material 70, and a second hole 68 is formed in a laminated portion of the sheet material 70 and the sheet material 76. Fold at the side.

  Next, as shown in FIG. 5B, the adhesive 84 is applied to the edge of the sheet material 70, and is folded at a portion closer to the first hole 66 than the portion where the stretchable material 64 for standing is disposed. Further, as shown in FIG. 8C, the sheet materials 70 are bonded together by an adhesive 84 to form the tubular partition wall 62A and the internal space 60. Finally, as shown in FIG. 1 (d), the tubular partition wall 62A is bonded to the absorbent article main body (the top sheet 18 in the illustrated example) with an adhesive 86 or the like, so that the absorbent article 1A shown in FIG. Such an absorbent article is obtained.

  At this time, it is preferable that the adhesive 84 and the adhesive 86 are applied narrowly as long as the tubular partition wall 62A is not peeled off. By forming the bonding portion between the sheet material 70 and the top sheet 18 formed by the adhesive 86 and the bonding portion between the sheet materials 70 formed by the adhesive 84 to be narrow, the tubular partition wall 62A is restrained by the bonding portion. However, the standing expansion / contraction material 64 is sufficiently raised to improve the exhaust effect of the tubular partition wall 62A. Although a preferable bonding width varies depending on the structure of the absorbent article and the tubular partition wall, it is preferable that they are bonded at an interval corresponding to 10 to 80% of the width of the tubular partition wall. The “width” of the tubular partition wall here means the width in the front-rear direction of the absorbent article in a state in which the tubular partition wall is folded in a plane, and the “adhesion width” means the tube It means the distance between the outer edge of the adhesive 84 and the outer edge of the adhesive 86 for fixing the partition wall.

  The absorbent article 1A shown in FIG. 1B is an example in which the sheet material 76 is arranged not only on the top of the tubular partition wall 62A but also on the second side surface of the tubular partition wall 62A. On the other hand, the absorbent article 1B shown in FIG. 2 has the sheet material 76 disposed only on the top of the tubular partition wall 62B on which the stretchable material 64 for standing is disposed, and the first side surface and the second side of the tubular partition wall 62B. In this example, the sheet material 76 is not disposed on the side surface. That is, the first side surface and the second side surface of the tubular partition wall 62B are formed only by the sheet material 70, and the first hole 66 and the second hole 68 are formed in this portion.

  In the configuration as described above, the first side surface and the second side surface of the tubular partition wall 62 </ b> B are configured by the single sheet material 70 and are excellent in flexibility. Therefore, compared with the case where the 1st side and the 2nd side are constituted with a plurality of sheet materials, tube-like partition wall 62B can be stood up more easily, and the followability to a wearer's skin is improved. Can do. Further, since the sheet material 76 is disposed only in the portion where the standing stretchable material 64 is fixed, the usage amount of the sheet material 76 can be reduced.

  Moreover, the tubular partition wall 62 </ b> B shown in FIG. 2 is an example in which the standing stretchable material 64 is directly sandwiched and fixed between the sheet material 70 and the sheet material 76. On the other hand, the tubular partition wall 62C shown in FIG. 3A is an example in which the sheet material 76 is folded in half, and the standing expansion / contraction material 64 is sandwiched and fixed between the folded portions.

  In the structure shown in FIG. 3A, the stretchable material 64 for standing up is less likely to come into direct contact with the wearer's skin, and the wearer's skin is not strongly stimulated by the stretchable material 64 for standing up. Therefore, skin troubles such as fogging due to the contact of the elastic material can be suppressed. 3A is preferable in that the sheet material 70 and the sheet material 76 can be configured by sheets made of different materials. For example, a hydrophilic nonwoven fabric sheet can be used as the sheet material 70 in contact with the wearer's skin, and a water-repellent (hydrophobic) nonwoven fabric sheet can be used as the sheet material 76. Further, a non-woven fabric sheet having holes may be used as the sheet material 70, and a normal (non-perforated) non-woven fabric sheet may be used as the sheet material 76. It is preferable to use a perforated nonwoven fabric sheet as the sheet material 70 because it is not necessary to separately form the first hole 66 and the second hole 68.

  Further, the tubular partition wall 62C shown in FIG. 3A is fixed by an adhesive (hot melt adhesive or the like) in which the sheet material 70 and the sheet material 76 sandwiching the standing stretchable material 64 are spirally applied. . Such a fixing method is different from the case where the sheet materials 70 and 76 are bonded and fixed over the entire surface, so that a gap is easily formed between the sheet materials 70 and 76, and the skin trouble suppressing effect is improved.

  The tubular partition wall 62C shown in FIG. 3A can be obtained by the method shown in FIG. 3B, for example. First, the adhesive 102 is applied to the half surface of the sheet material 76. In the illustrated example, the adhesive 102 is applied in a planar shape (FIG. (A)). Next, the stretchable material 64 for standing is placed in the coated portion of the adhesive 102 (FIG. (B)). Further, the half surface of the sheet material 76 is folded, and the standing expansion / contraction material 64 is sandwiched and fixed between layers of the folded portion of the sheet material 76 (FIG. (C)).

  On the other hand, the adhesive 100 is coated on the surface of the sheet material 70 in a spiral shape (FIG. (D)). Next, a sheet material 76 on which the standing stretchable material 64 is arranged and fixed is bonded to the coated portion of the adhesive 100 (FIG. 5E), and the first hole 66 and the second hole 68 are formed in the sheet material 70. Is drilled ((f) diagram). Further, a part of the sheet material 70 (the region on the left side of the drawing) is folded so as to overlap the sheet material 76 ((g) diagram). The adhesive agent 104 is applied along the side edge of the sheet material 70 (the side edge on the right side of the drawing), the sheet material 70 is further folded, and the other side of the sheet material 70 with respect to the applied portion of the adhesive material 104 By bonding the edges (FIG. (H)), a tubular partition 62C is obtained (FIG. (I)).

  In the absorbent article of the present invention, as in the absorbent article 1D shown in FIG. 4A, the tubular partition wall 62D is composed of one sheet material 70, and the edge of the one sheet material 70 is folded. It is also preferable that the folded portion is formed, and the stretchable elastic material 64 is fixed in an expanded state between the folded portions.

  That is, in the absorbent article 1A shown in FIG. 1B, the tubular partition wall 62A is formed by the two sheet materials 70 and 76, but the tubular partition wall is formed by one sheet material without using the two sheet materials. Can also be formed. For example, after forming a tubular outer shell portion of a tubular partition of a sheet material, it is folded back at the portion that hits the bottom portion to form a folded portion, and the stretchable material for standing is fixed in an expanded state to the folded portion Good. By doing so, a tube-shaped partition wall having the same effect as the tube-shaped partition wall 62A of the absorbent article 1A shown in FIG. 1B can be formed by only one sheet material.

  4B, a tubular outer shell 90 that forms the internal space 60 is formed, and a bellows 92 that extends into the internal space 60 is formed. The material 64 is preferably fixed, and the outer shell portion 90 and the tongue portion 92 are more preferably formed by an integral sheet material 70.

  In the example of FIG. 4B, the tubular partition wall 62 </ b> D is formed with an outer shell portion 90 that forms an internal space 60 partitioned from the outside by a region 70 a on one end E <b> 1 side of the sheet material 70, and the sheet material. The other end E2 side region 70 forms a bellows 92 that extends into the internal space 60, and a standing stretchable material 64 is fixed to the bellows 92. The absorbent article 1F shown in FIG. 7B, which will be described later, the absorbent article 1I shown in FIG. 10, and the absorbent article 1J shown in FIG. 11 are also provided with tubular partition walls 62F, 62I, 62J in which such tongue portions are formed. It is an example of an absorbent article.

  The “velo part” means a sheet-like part protruding into the internal space of the tubular partition. The “velo part” does not constitute the tubular outer shell part of the tubular partition wall, but is a member that constitutes the internal structure of the tubular partition wall provided exclusively for placing the standing stretchable material.

  FIG. 4B is a partially enlarged cross-sectional view showing an enlarged portion of the tubular partition wall 62D of FIG. 4A. In this figure, for convenience of explanation, a region 70a on one end E1 side of the sheet material 70 is indicated by hatching, and a region 70b on the other end E2 side is indicated by filling with a dot pattern.

  The sheet material 70 includes a region 70a on the end E1 side (portion from one end E1 to the first turn-back point P1) and a region 70b on the end E2 side (end from the first turn-up point P1). The portion up to E2). The region 70 a forms an outer shell 90 that forms an internal space 60 partitioned from the outside, and the region 70 b forms a tongue 92 that extends into the internal space 60. The tongue portion 92 is folded at the second folding point P2, and the standing stretchable material 64 is sandwiched and fixed between the layers of the folded portion. The folding point P2 of the tongue 92 is joined to the inner surface of the outer shell 90 by an adhesive 94.

  According to the structure shown in FIG. 4B, an air layer 96 is formed between the tongue 92 and the outer shell 90 that is in direct contact with the wearer's skin. Therefore, as compared with the structure shown in FIGS. 1B and 2, the stretchable material 64 for standing up does not strongly irritate the wearer's skin, and can effectively prevent skin troubles such as fog due to contact with the stretchable material. it can.

  The tubular partition wall 62D shown in FIGS. 4A and 4B can be manufactured by a method as shown in FIG. 4C, for example. First, as shown in FIG. 3A, the end portion of the sheet material 70 is folded back, and the stretchable material 64 for standing up is sandwiched and fixed between the layers of the sheet material 70. At this time, an adhesive 94 is applied. Further, the region 70b on the end E2 side is folded. By doing so, as shown in FIG. 7B, the adhesive 94 bonds the end portion E2 side region 70b and the end portion E1 side region 70a in an overlapped state. At this time, in order to prevent peeling, the joining portion 82 is formed by heat sealing in the stacked portion of the region 70b on the end E2 side and the region 70a on the end E1 side. A portion between the portion bonded with the adhesive 94 in the region 70b on the end E2 side and the joining portion 82 is a portion that becomes a tongue portion of the tubular partition wall.

  After that, as shown in FIG. 5C, the second hole 68 is formed in the portion consisting only of the region 70a on the end E1 side, and the laminated portion of the region 70b on the end E2 side and the region 70a on the end E1 side. A first hole 66 is formed. At this time, an adhesive 98 is applied. Furthermore, the part which consists only of the area | region 70a by the side of the edge part E1 is folded.

  (D) As shown in the figure, the region 98b on the end E2 side and the region 70a on the end E1 side are bonded by the adhesive 98. By doing so, a tubular partition wall 62D having a tongue portion can be formed.

[2-1C] Standing stretchable material:
As shown in FIGS. 1A and 1B, the tubular partition wall 62 </ b> A has an upright stretchable material 64 that is stretched in the direction in which the internal space 60 is formed fixed to the top side. The “internal space forming direction” means a direction connecting two end openings of the tubular structure constituting the tubular partition. Due to the contraction force of the standing stretchable material 64, the tubular partition wall 62A stands up three-dimensionally, and the hollow tubular structure is maintained. Further, the internal space 60 formed by the easily deformable sheet materials 70 and 76 and the standing stretchable material 64 is deformed freely when a force is applied, and returns to its original shape when no force is applied. Therefore, an exhaust mechanism similar to a pump can function well. The type of the stretchable material for standing up, the arrangement method, and the like may be configured according to the leg-around stretchable material described later.

  It is preferable to arrange a plurality of standing stretchable materials, although they vary depending on the material, thickness, stretch rate, and the like. For example, the absorbent article 1A shown in FIGS. 1A and 1B is an example in which five standing stretchable members 64 are arranged on the top of the tubular partition wall 62A.

[2-1D] Hole:
As shown in FIGS. 1A and 1B, the tubular partition wall 62 </ b> A has two opposing side surfaces on both sides of the standing stretchable material 64. The “side surface” means a side surface in a state where the tubular partition wall is erected. More specifically, among the tubular partition walls, the arrangement region of the stretchable materials for standing (in the case where a plurality of standing stretchable materials are disposed, the two stretchable materials 64 for standing up are arranged on the outermost side. It means a portion excluding the sandwiched area) and the fixed area (the bottom part of the tubular partition wall and the area fixed to the diaper body).

  The tubular partition wall 62A is formed with a first hole 66 that communicates the internal space 60 and the external space on the first side surface, and also communicates the internal space 60 and the external space on the second side surface. A second hole 68 is formed. Further, in the tubular partition wall 62A, the first side surface and the first hole 66 are oriented toward the crotch part 4 side, and the second side surface and the second hole 68 are oriented toward the edge 6c side of the back body 6. Is arranged. With such a structure, moisture is taken in from the first hole 66 and mixed with the outside air in the internal space 60, and then the moisture is discharged from the second hole 68 to the outside of the absorbent article 1A.

  The “hole” means an opening that communicates the internal space 60 and the external space of the tubular partition wall 62A, and the shape thereof is not particularly limited. For example, shapes such as a circle, an ellipse, and a polygon (triangle, square, etc.) can be mentioned. The “hole” includes not only one that is always open, but also one that is formed by a slit as described later and opens only during intake and exhaust.

  In the tubular partition, the first hole or the second hole is preferably formed by a slit having a convex locus or a plurality of intersecting slits. The first hole or the second hole is not simply an opening, but is formed by the slit, so that a tongue piece that functions as a valve can be attached to the first hole very easily. The tongue piece allows moisture to pass through while preventing urine and body fluid from entering the exhaust path.

  Although the form of the slit is not particularly limited, examples of the “slit having a convex locus” include a) a slit 74A having a curved portion and b) a slit 74B having a bent portion as shown in FIG. 5A. . In addition, as "a plurality of intersecting slits", as shown in FIG. 5A, c) a cross-shaped slit 74C where two slits intersect, and d) a star-shaped slit 74D where three slits intersect. Etc.

  As shown in FIGS. 5A and 5B, the slit 74A can form the substantially elliptical tongue piece 72A and the substantially elliptical first hole 66A, and the slit 74B can form the triangular tongue piece 72B and the triangular shape. A first hole 66B having a shape can be formed. In addition, the triangular tongue piece 72C and the rectangular first hole 66C can be formed by the slit 74C, and the triangular tongue piece 72D and the hexagonal first hole 66D are formed by the slit 74D. be able to.

  As shown in FIGS. 1A and 1B, the tubular partition wall 62A preferably has a plurality of first holes 66 and second holes 68 formed therein. By forming a plurality of first holes and second holes, the moisture can be easily discharged to the outside of the absorbent article.

The specific number of “plurality” is not limited. Although depending on the opening area of the hole, if the opening area per hole is 0.5 to 10 mm ² , it is preferable to form 5 to 200 first holes and 2 to 100 holes, respectively. More preferably, it is formed. By setting it to 5 or more, the exhaust function can be secured. On the other hand, by setting it to 200 or less, it is possible to effectively prevent urine and body fluid from flowing into the exhaust path.

[2-1E] Number of arrangement:
The absorbent article of the present invention includes not only one having one tubular partition wall but also one having two or more. Specifically, like the absorbent article 1E shown in FIG. 6, in addition to the first tube-shaped partition wall 62A, the tube-shaped partition wall includes a second tube-shaped partition wall 62E. The end of the back body 6 so that the first side surface and the first hole 66 are oriented toward the crotch 4 side, and the second side surface and the second hole 68 are oriented toward the edge 6c of the back body 6. Arranged along the edge 6c, the second tubular partition wall 62E has the first side surface and the first hole 66 oriented toward the crotch 4 side, and the second side surface and the second hole 68 formed in the front body 2. What is arranged along the edge 2c of the front body 2 is preferable so as to be oriented toward the edge 2c. Such a form can obtain the moisture discharging effect of the tubular partition wall on the entire circumference around the waist (both the front body side and the back body side).

  The second tubular partition is not particularly different from the tubular partition described above in terms of material, structure, and the like, and is different from being arranged along the edge of the front body, not the edge of the back body. In this case, as shown in FIG. 6, the tubular partition walls 62A and 62E are generally disposed linearly in the width direction of the absorbent article 1E, and the pair of tubular partition walls 62A and 62E are generally disposed in parallel. Is.

[2-1F] Arrangement position:
As shown in FIG. 1A, the tubular partition wall 62 </ b> A is disposed along at least the edge 6 c of the back body 6. “Along the edge” means being arranged substantially parallel to the edge (that is, linearly along the width direction of the diaper).

  Therefore, in the present invention, as long as the tubular partition wall is along the edge of the back body, the positional relationship with the edge is not limited. However, it is preferable to arrange in a portion near the waist where the wearer's movement is large, specifically, in the vicinity of the edge of the back body (the region where the shortest distance to the edge is within 5 mm). This is because the tubular partition wall (and consequently the internal space) is greatly deformed by the wearer's action, and thus the exhaust mechanism can function well.

  In addition, since the tube-shaped partition wall stands up three-dimensionally by the stretchable material for standing up, it is also possible to exhibit a three-dimensional gather function. As described above, by disposing the tubular partition wall in the vicinity of the edge of the back body, it is possible to effectively prevent back leakage of excrement.

  When arranging tubular partition walls, it is common to close the edge openings so that the inner space is not released by sealing the left and right edges of the tubular structure with hot melt adhesive or the like. is there.

  The absorbent article according to the present invention has tubular partition walls 62F and 62H in the front body and the back body of the absorbent article as in the absorbent article 1F shown in FIGS. 7A and 7B and the absorbent article 1H shown in FIG. It is also preferable that it is arranged at least around one part of the stomach. By disposing from the edge around the waist (in this case, the edge 6c of the back body) in the abdominal area, the edge around the waist (this is the same as the absorbent article 1A shown in FIGS. 1A and 1B) In this case, compared with the case where the tubular partition wall 62A is provided near the edge 6c) of the back body, the moisture staying in the vicinity of the crotch portion can be taken into the tubular partition wall more quickly when the moisture is discharged.

  Furthermore, in the absorbent article of the present invention, as in the absorbent article 1J shown in FIG. 11, the tubular partition wall 62J includes at least one waist and abdomen around the front body 2 and the back body 6 of the absorbent article 1J. It is preferable that it is arrange | positioned so that both parts of a part may be covered. Such a structure can make the wide range from the waist circumference of the absorbent article 1J main body to the belly circumference floated from the wearer's skin by raising the tubular partition wall 62J. Therefore, compared with the absorbent article 1A (FIG. 1A etc.) provided with the tubular partition wall 62A only around the waist and the absorbent article 1F (FIG. 7A etc.) provided with the tubular partition wall 62F only around the waist. Since the volume of the internal space 60 of the partition wall 62J is large and the arrangement site is also wide, more moisture can be discharged efficiently. Moreover, since the arrangement | positioning site | part of the tubular partition 62J spreads over a wide range, a wearer's movement in any part around a waist and an abdomen can be converted into a deformation | transformation of the tubular partition 62J. Accordingly, it is possible to efficiently discharge moisture as compared with the forms such as the absorbent articles 1A and 1F shown in FIG. 1A and FIG. 7A.

[2-1G] Relationship with exterior sheet:
The tubular partition may be constituted by a sheet material independent of other members, or may be constituted integrally with a sheet material constituting other members of the absorbent article. For example, the exterior sheet | seat of a pants-type disposable diaper and a tubular partition can also be comprised with the continuous sheet material.

  In the absorbent article 1G shown in FIG. 8, at least one end portion of the front end portion and the rear end portion of the exterior sheet 16 is folded back inward from the edge around the waist of the diaper to form a folded portion. The tubular partition wall 62G is formed by the sheet material constituting the folded portion. In this example, the rear end portion of the exterior sheet 16 is folded back inward from the edge around the waist of the diaper to form a folded portion. The folded portion is formed by a laminated portion of the inner sheet 16a and the outer sheet 16b, and a tubular partition wall 62G is formed by a part of the folded portion. Thus, it becomes easy to take in external air by forming the 2nd hole 68 outward in the edge part of a diaper. In addition, by arranging the tubular partition wall 62G at the end portion around the waist where the shape is likely to change due to the wearer's action, the tubular partition wall 62G is deformed and the exhaust mechanism can function well. Further, by forming the tubular partition wall 62G at the folded portion of the exterior sheet 16, it is possible to avoid making the manufacturing process complicated as compared with the case where a separate tubular partition wall is attached to the main body of the absorbent article. be able to. That is, it can be easily manufactured.

  Further, in the pants-type disposable diaper, as shown in FIGS. 7A and 7B, the inner sheet 16a and the outer sheet 16b are formed from the front edge and the rear edge of one sheet from the other edge. Are bonded so as to form a single layer portion (in the example shown, a single layer portion consisting only of the outer sheet 16b from the rear end portion of the inner sheet 16a and the rear end portion of the outer sheet 16b protruding) At least a part of the single layer portion is folded inside the diaper to form a folded portion, and the folded portion covers one end of the absorbent main body 14, It may be bonded to the surfaces of the inner sheet 16a and the top sheet 18.

  Such a form is preferable in that the end portion of the absorbent main body is encapsulated by the inner sheet or the outer sheet, and leakage from the end portion on the back body side of the absorbent main body can be prevented. Further, since the folded portion is formed of a single layer portion, the folded portion can be made thinner by the amount of one of the sheets compared to the case where the multilayer portion of the inner sheet and the outer sheet is folded as it is. That is, the fall of the softness | flexibility by having formed the folding | turning part can be suppressed as much as possible, and the diaper excellent in the feeling of wear can be comprised.

  In addition, “at least a part of the single-layer part forms a folded portion” means that a) a part of the single-layer part is folded, and b) the whole of the single-layer part is folded. , C) It is intended to include three forms in which the entire single-layer part and the multilayer part continuing to this are folded.

  The absorbent article 1H shown in FIG. 9 is bonded so that the rear end portion of the outer sheet 16b protrudes from the rear end edge of the inner sheet 16a to form a single layer portion, and the entire single layer portion is a diaper. This is an example in which a folded portion is formed by being folded inside, and the folded portion is bonded to the surfaces of the inner sheet 16 a and the top sheet 18 so as to cover the rear end portion of the absorbent main body 14. However, in the present invention, contrary to FIG. 9, the rear end of the inner sheet may stick out so as to form a single layer portion from the rear end edge of the outer sheet. In this case, the folded inner sheet is bonded to the surface of the inner sheet itself and the surface of the top sheet.

  In the above-mentioned form, it is preferable that the tubular partition wall 62F is attached to the surface of the folded portion as in the absorbent article 1F shown in FIGS. 7A and 7B. When the tube-shaped partition wall is attached to the folded portion, the tube-shaped partition wall 62F does not directly contact the top sheet 18 constituting the absorbent main body 14, and is difficult to touch urine and feces. Therefore, the tubular partition wall 62F is less likely to get wet or dirty with urine or stool, and it is difficult to give discomfort to the wearer.

  Further, when the inner sheet or the outer sheet has the folded portion, the inner sheet so that a part of the folded portion covers one end of the absorbent main body 14 as in the absorbent article 1H shown in FIG. While being bonded to the surface of the sheet 16a and the top sheet 18, it is preferable that the other part forms the tubular partition wall 62H. In other words, as shown in FIG. 9, the folded outer sheet 16b (or inner sheet) and the sheet material 70 constituting the tubular partition wall 62H are configured by one continuous sheet. Is preferred.

  In the form of FIG. 9, the folded portion of the outer sheet 16b also serves as the bottom surface of the tubular partition wall 62H. Such a configuration can reduce the number of sheets laminated on the bottom side of the tubular partition wall by one as compared with the absorbent article 1F provided with the tubular partition wall 62F on the surface of the folded portion (see FIG. 7B). Moreover, the adhesive agent etc. which adhere | attach the bottom face of a tubular partition and folding | turning parts, such as an outer sheet, are unnecessary. Therefore, it can be set as the tubular partition which is excellent in the softness | flexibility of a bottom part side, and is easy to deform | transform following a wearer's operation | movement (namely, the discharge effect of moisture is high).

[2-1H] Relationship with waist elastic material:
In the absorbent article of the present invention, instead of the elastic material around the waist of the exterior sheet 16 as in the absorbent article 1I shown in FIG. 10 and the absorbent article 1J shown in FIG. It is also preferable that the tubular partition walls 62I and 62J are arranged. In such a form, a tubular partition can be functioned as an elastic material around the waist. This is because the tubular partition fits around the waist of the wearer, and therefore leakage from the waist opening can be prevented without separately arranging a waist elastic.

  In this way, when a tubular partition is arranged instead of the elastic material around the waist, as shown in FIGS. 10 and 11, the crotch portion and the abdominal portion of the outer sheet 16 are the inner sheet 16a and the outer sheet. It is preferable that 16b is bonded together, and the waist circumference part is formed by bonding single layer parts. Since the outer sheet is bonded to the inner sheet and the outer sheet for the purpose of disposing the stretchable material between the layers, when the stretchable material around the waist is not disposed, it is not necessary to have a bonded structure for the portion. And if it is the said structure, an exterior sheet can be made thin by the sheet | seat of either an inner sheet | seat and an outer sheet | seat, the softness | flexibility of an exterior sheet | seat can be improved, and the diaper excellent in the feeling of wear can be comprised. . The form shown in FIGS. 10 and 11 is an example in which the inner sheet 16a is not disposed around the waist and only the outer sheet 16b is configured.

[3] Components of the absorbent article:
The absorbent article of the present invention is arranged such that the absorbent body 22 and at least a part thereof are made of a liquid-permeable material and cover the surface of the absorbent body 22 as in the absorbent article 1A shown in FIGS. 1A to 1C. The top sheet 18 is made of a liquid-impermeable material, and the back sheet 20 is disposed so as to cover the back surface of the absorber 22.

[3-1] Absorber:
The “absorber” is a member for absorbing and holding the wearer's urine and the like, and is made of an absorbent material.

  Examples of the “absorbent material” include fluff pulp, super absorbent polymer (hereinafter referred to as “SAP”), a hydrophilic sheet, and the like. “Fluff pulp” is made by pulverizing wood pulp or non-wood pulp into cotton, “SAP” is sodium polyacrylate, “Hydrophilic sheet” is tissue, absorbent paper, hydrophilized It is preferable to use a non-woven fabric that has been treated.

  As the absorber, it is preferable to use one or two or more absorbent materials formed into a single-layer or multi-layer mat. Especially, what combined 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be mixed in the fluff pulp mat or used in a layered manner between the fluff pulp mats.

  The absorber can be used after being molded into a desired shape such as a rectangular shape, an hourglass shape, a gourd shape, or a T-shape. The absorber is preferably encapsulated with a hydrophilic sheet for the purpose of preventing SAP from falling off and imparting shape stability. Usually, the absorber is sandwiched between a top sheet and a back sheet, and used in a state of being integrated with both sheets.

[3-2] Top sheet:
Since the top sheet needs to allow the wearer's urine or the like to pass therethrough, at least a part (all or a part) of the top sheet is made of a liquid-permeable material.

  Examples of the “liquid permeable material” include woven fabric, non-woven fabric, and porous film. Among these, it is preferable to use a nonwoven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, aliphatic polyamide, etc., which has been subjected to a hydrophilic treatment.

  As the “nonwoven fabric”, a nonwoven fabric produced by a manufacturing method such as air-through (card hot air) or card embossing can be suitably used. The “hydrophilic treatment” can be performed by applying, spraying, impregnating, etc. a surfactant.

  The top sheet is preferably “at least partly”, more specifically, when the top sheet is viewed in plan, at least the vicinity of the surface of the absorber is made of a liquid-permeable material.

  In addition, the sheet | seat located in the wearer's skin side of an absorbent article does not need to be comprised with all the top sheets. That is, the sheet in contact with the wearer's skin may be constituted by a plurality of sheets including the top sheet, and the top sheet and other sheets may be joined together in the surface direction of the sheet.

  For example, the absorbent article 1A shown in FIGS. 1A and 1C is a tape-type disposable diaper, and a top sheet 18 made of a liquid-permeable material is disposed at the center in the width direction of the diaper, and the side flap portion of the diaper is disposed on the side flap portion. This is an example in which a side sheet 19 made of a breathable water-repellent material showing resistance to liquid permeation is disposed. The ventilated water-repellent sheet may be a non-woven fabric produced by a method such as card embossing or spunbond, but a non-woven fabric sheet such as SMS or SMMS having a high waterproof property is more preferable.

[3-3] Backsheet:
A backsheet is a sheet | seat arrange | positioned so that the back surface (surface located in the side far from a wearer's skin at the time of mounting | wearing of a diaper) may be coat | covered. The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the diaper.

  There is no restriction | limiting in particular about the arrangement position of a back seat | sheet. From the viewpoint of preventing leakage of urine absorbed by the absorber, it is preferable that a back sheet is disposed at least in a portion where the absorber exists.

  Examples of the liquid-impermeable material constituting the backsheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impervious but has moisture permeability, so that the inside of the diaper can be prevented from being steamed There is.

  As shown in FIG. 1C, a cover sheet 24 may be bonded to the outer surface side of the back sheet 20. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

[3-4] Solid gathering:
The absorbent article of the present invention is composed of a pair of left and right three-dimensional gathers composed of a water-repellent sheet 32 and disposed on both sides of the absorbent body 22 like the absorbent article 1C shown in FIG. 1C and the absorbent article 1F shown in FIG. 7C. 26 (26a, 26b) is preferably provided.

  The structure of a three-dimensional gather can employ | adopt the structure used for the conventional disposable diaper and other absorbent articles. For example, as shown in FIG. 1C or FIG. 7C, a three-dimensional gather stretchable material 36 is sandwiched and fixed between layers of the water-repellent sheet 32, and a gather is formed by the contraction force of the three-dimensional gather stretchable material 36. It can be used suitably.

  The three-dimensional gather may be separately provided with a water-repellent sheet for three-dimensional gather as described above, or may be formed by a part of a sheet material (for example, a water-repellent side sheet) constituting a diaper. Good. The water-repellent sheet may be a nonwoven fabric produced by a production method such as card embossing or spunbonding, but a nonwoven fabric sheet such as SMS or SMMS having a high waterproof property is more preferable.

  When the absorbent article of the present invention is a pants-type disposable diaper, as shown in FIGS. 7A and 7C, the absorbent main body is formed in the gap between the side edge of the absorbent main body 14 and the inner surface of the three-dimensional gather 26. You may attach the three-dimensional gather elastic material 38 along the 14 side edge. When the three-dimensional gather elastic member 38 is attached at this position, the portion contracts, and the side edge of the absorbent main body 14 warps upward, so that urine and feces can move inside the member constituting the absorbent main body 14. It is possible to prevent permeation from the side edge of the absorbent main body 14 by gradually penetrating. Therefore, it is possible to effectively prevent leakage of excrement due to the exudation.

[3-5] Fastening tape:
As shown in FIG. 1A, the absorbent article of the present invention is for fixing the front body 2 and the back body 6 arranged so as to extend from the left and right side edges 6a, 6b of the back body 6. A fastening tape 11 may be provided. That is, the absorbent article of the present invention includes so-called tape-type disposable diapers.

The fastening member of the fastening tape may be an adhesive fastener that is fixed by an adhesive, but a mechanical fastener that is fixed by mechanical coupling (surface fastener).
Is preferably used. In addition to high fastening force, the mechanical fastener has an advantage that the fastening force does not decrease even when the detachment is performed a plurality of times.

  For example, an absorbent article 1A shown in FIG. 1A is an example in which a mechanical fastener 46 is used as a fastening member. A hook material 46 a is attached near the tip of the fastening tape 11, while a front patch 13 made of a loop material 46 b is attached to the front body 2, and the fastening tape 11 is attached to the front patch 13. It is comprised so that it can stop.

  The number of fastening tapes is not particularly limited, and an appropriate number of fastening tapes may be attached according to the dimensions of the wearer's body shape (specifically, around the waist, around the legs, etc.). In general, a pair of disposable diapers for infants (one each on the left and right) is attached, and a pair of disposable diapers for adults (two on the left and two on the left) are attached.

[3-6] Various elastic materials:
When the absorbent article of the present invention is a disposable diaper, it is preferable to dispose elastic materials such as a leg elastic material, a waist elastic material, and an abdominal elastic material.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. In the absorbent article 1A shown in FIGS. 1A and 1C, three leg-around elastic members 40 are arranged linearly along the side edge of the absorbent body 22. Moreover, in the absorbent article 1F shown in FIGS. 7A, 7D, and 7E, two leg-periphery elastic members 40 are disposed along the curve of the leg-periphery opening 12. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented.

  The leg elastic material is made of thread rubber, flat rubber or the like. And it is preferable that the leg periphery elastic material is arrange | positioned in the part outside the standing line of a three-dimensional gather. With such a configuration, it is possible to improve the wearing feeling and wearing feeling of the crotch part while ensuring a sufficient leakage preventing effect of the three-dimensional gather.

  The waist elastic material is an elastic material arranged along the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist, preventing urine leakage from around the waist, and improving the fit of the diaper to the wearer, thereby preventing the diaper from falling down.

  Absorbent article 1A shown in FIG. 1A is an example in which a belt-like waist elastic member 42 is disposed along the edge of the back body 6 of the diaper. The belt-like waist elastic member 42 is made of an elastic foam such as urethane foam. In the illustrated example, the waist elastic member 42 is disposed only on the back body (back side), but the waist elastic material may be disposed on the front body (abdominal side). Moreover, the absorbent article 1F shown to FIG. 7D is an example which has arrange | positioned the thread-like waist circumference elastic material 42 along the edge of the back body 6 of a diaper.

  In a pants-type disposable diaper, a stretchable material around the waist is generally fixed to a portion around the waist of the exterior sheet between the layers of the exterior sheet. The “layer between exterior sheets” is not limited to the one in which the elastic material 42 around the waist is fixed between the layers where the inner sheet 16a and the outer sheet 16b are bonded as shown in FIG. 7B. For example, a material in which an elastic material around the waist is fixed between layers of the folded portion of the inner sheet or the outer sheet is also included.

  When the absorbent article of the present invention is a pants-type disposable diaper, as shown in FIGS. 7D and 7E, it is also preferable to arrange an abdominal circumference stretchable material 44.

  An abdominal circumference elastic material is an elastic material arrange | positioned in the part (namely, part equivalent to a wearer's abdominal circumference) between a waist circumference opening part and a leg circumference opening part. By arranging the elastic material around the abdomen, it is possible to form a highly elastic tammy gather around the abdomen of the wearer. This Tammy Gather, together with West Gather, can make the diaper fit and anti-slip effect even better.

  For these stretchable materials, after considering the degree of shrinkage of gathers, etc., the constituent material, the elongation rate of the material, the stretched state at the time of fixing, etc. may be determined.

  As an elastic material, the elastic material which has been used with the conventional disposable diaper can be used conveniently. Specific examples include elastic rubber, elastic film, elastic foam (urethane foam, etc.), etc. in addition to natural rubber flat rubber and synthetic rubber (urethane rubber, etc.) elastic thread. it can.

  The stretchable material is preferably fixed in the stretched state in order to exert a sufficient stretch force. For example, when the elastic material is a flat rubber made of natural rubber or a thread rubber made of an elastic thread of synthetic rubber, it is preferably fixed in an extended state of 120 to 400%, and fixed in an extended state of 200 to 300%. More preferably. By fixing in the extended state in such a range, it is possible to apply a sufficient expansion / contraction force without applying an excessive tightening force to the wearer.

  The stretchable material as described above is fixed to other constituent members of the diaper by an adhesive or other means. The fixing method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat such as heat sealing or ultrasonic waves.

[4] Application target:
In addition, the absorbent article of this invention is applicable also to absorbent articles, such as a urine pad other than the tape type disposable diaper and pants type disposable diaper which were already demonstrated.

  The “urine pad” is also referred to as an inner pad or an auxiliary pad, and is an absorption pad exclusively for urine absorption. This urine pad is used in a state of being placed on the inner surface of the underwear or the surface of the top sheet of the disposable diaper. Like a disposable diaper, the urine pad includes an absorbent body, a top sheet disposed so as to cover the surface of the absorbent body, and a back sheet disposed so as to cover the back surface of the absorbent body. Generally, it is configured in a small pad shape that does not have a portion that encloses a person's waist.

  The absorbent article of the present invention will be described more specifically with reference to the drawings. However, the absorbent article of the present invention encompasses all absorbent articles having the invention-specific matters, and is not limited to the following examples.

[Example 1]
As the absorbent article of Example 1, a tape-type disposable diaper was produced. The specific structure was the structure of the absorbent article 1A shown in FIGS. 1A to 1C. This absorbent article 1A is of L size for babies, and the length in the front-rear direction is 485 mm, and the width of the back body 6 (the length between the side edges 6a and 6b) is 325 mm.

  Absorbent article 1A was constituted by sheet material 70 made of SMS nonwoven fabric and sheet material 76 made of SMS nonwoven fabric separately from this. The tubular partition wall 62A was formed by the method shown in FIG. 1D. The sheet materials 70 and 76 were laminated together at portions corresponding to the top portion and the second side surface of the tubular partition wall 62A to form a laminated portion.

  In the absorbent article 1A, five stretchable materials were placed in an expanded state between the layers of the laminated portion as the standing stretchable material 64 of the tubular partition wall 62A. The fixed length of the three-dimensional gather stretchable material 36 was 380 mm, and the stretch rate (length when stretched / length when not stretched × 100) was 300%.

On the first side surface and the second side surface of the tubular partition wall 62A, there are 60 first holes 66 and second holes 68 in a pattern of 30 × 2 rows from the left end to the right end in the width direction. Formed. The shape of the first hole 66 and the second hole 68 was an elliptical shape having a major axis of 3 mm and a minor axis of 2 mm, and the opening area was 4.7 cm ² .

The tubular partition wall 62 </ b> A was disposed along the edge 6 c of the back body 6. The distance between the edge 6c and the fixed part of the tubular partition was 10 mm. Thereby, the internal space 60 partitioned from the outside by the sheet materials 70 and 76 was formed. The maximum cross-sectional area of the internal space 60 was 3.1 cm ² .

  The absorbent article of the present invention can be used for absorbent articles such as disposable diapers and urine pads for infants or adults such as the elderly and persons with disabilities who need care.

It is a figure showing one embodiment of an absorptive article of the present invention, and is a schematic top view showing a state where an absorptive article was developed and seen from the top sheet side. It is a schematic sectional drawing which shows the X-X 'cross section of the absorbent article shown to FIG. 1A. It is a schematic sectional drawing which shows the Y-Y 'cross section of the absorbent article shown to FIG. 1A. It is process drawing which shows the method of forming the tubular partition of the absorbent article shown to FIG. 1A. It is a figure which shows another embodiment of the absorbent article of this invention, and is a schematic sectional drawing which shows the cross section corresponding to FIG. 1B. It is a figure which shows another embodiment of the absorbent article of this invention, and is a schematic sectional drawing which shows the cross section corresponding to FIG. 1B. It is process drawing which shows the method of forming the tubular partition of the absorbent article shown to FIG. 3A. It is a figure which shows another embodiment of the absorbent article of this invention, and is a schematic sectional drawing which shows the cross section corresponding to FIG. 1B. It is a partially expanded sectional view which expands and shows the part of the tubular partition of the absorbent article shown to FIG. 4A. It is process drawing which shows the method of forming the tubular partition of the absorbent article shown to FIG. 4A. It is a schematic plan view which shows embodiment of the 1st hole formed in the partition of the absorbent article of this invention. It is a schematic plan view which shows the state which the 1st hole shown to FIG. 5A opened. It is a figure which shows another embodiment of the absorbent article of this invention, and is a schematic plan view which shows the state which expand | deployed the absorbent article and was seen from the top sheet side. It is a schematic plan view which shows the state which expand | deployed the absorbent article of this invention and was seen from the top sheet side. It is a schematic sectional drawing which shows the X-X 'cross section of the absorbent article shown to FIG. 7A. It is a schematic sectional drawing which shows the Y-Y 'cross section of the absorbent article shown to FIG. 7A. It is a schematic perspective view which shows the state which assembled the absorbent article shown to FIG. 7A, and was seen from the front side. It is a schematic plan view which removes an absorptive main body from the absorptive article shown in Drawing 7A, and shows only a portion of an exterior sheet. It is a figure which shows another embodiment of the absorbent article of this invention, and is a schematic sectional drawing which shows the cross section corresponding to FIG. 7B. It is a figure which shows another embodiment of the absorbent article of this invention, and is a schematic sectional drawing which shows the cross section corresponding to FIG. 7B. It is a figure which shows another embodiment of the absorbent article of this invention, and is a schematic sectional drawing which shows the cross section corresponding to FIG. 7B. It is a figure which shows another embodiment of the absorbent article of this invention, and is a schematic sectional drawing which shows the cross section corresponding to FIG. 7B.

Explanation of symbols

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J: Absorbent article, 2: Front body, 2c: Edge, 4: Crotch, 6: Rear body, 6a, 6b: Side edges 6c: edge, 11: fastening tape, 13: front patch, 18: top sheet, 19: side sheet, 20: back sheet, 22: absorber, 24: cover sheet, 32: water repellent sheet, 36, 38: Three-dimensional gather elastic material, 40: Elastic material around leg, 42: Elastic material around waist, 44: Elastic material around belly, 46: Mechanical fastener, 46a: Hook material, 46b: Loop material, 60: Exhaust path, 62A, 62B, 62C, 62D, 62E, 62F, 62G, 62H, 62I, 62J: Tubular partition, 64: Standing stretchable material, 66, 66A, 66B, 66C, 66D: First hole, 68: Second hole 70 Sheet material, 70a, 70b: area, 72A, 72B, 72C, 72D: tongue, 74A, 74B, 74C, 74D: slit, 76: sheet material, 82: joint, 84, 86: adhesive, 90: outside Shell part, 92: Velor part, 94, 98, 100, 102, 104: Adhesive, 96: Air layer, E1: One end part, E2: Other end part, P1: First turning point, P2: Second turning point.

Claims (13)

Consists of each part of the front body, the crotch and the back body,
An absorber, at least partly made of a liquid-permeable material, a top sheet arranged to cover the surface of the absorber, and a liquid-impermeable material so as to cover the back surface of the absorber It is composed of an arranged back sheet and a sheet material, and has a tubular shape with an internal space partitioned from the outside, and a stretchable material for standing upright is fixed on the top side in the direction of forming the internal space. A tubular partition wall,
The tubular partition wall has a hollow tubular structure in which the internal space is formed by bonding one side edge of the sheet material to a part of the sheet material,
The tubular partition wall is formed with two opposing side surfaces on both sides of the upright elastic member, and a first hole is formed on the first side surface to communicate the internal space with the external space. In addition, a second hole that communicates the internal space and the external space is formed on the second side surface,
The tubular partition wall has the first side surface and the first hole oriented toward the crotch part, and the second side surface and the second hole oriented toward the edge of the back body. The absorbent article arrange | positioned along the edge of the said back body. As the tubular partition, a first tubular partition and a second tubular partition,
In the first tubular partition, the first side surface and the first hole are oriented toward the crotch part, and the second side surface and the second hole are oriented toward the edge of the back body. Arranged along the edge of the back body,
In the second tubular partition wall, the first side surface and the first hole are oriented toward the crotch part, and the second side surface and the second hole are oriented toward the edge side of the front body. Thus, the absorptive article according to claim 1 arranged along the edge of said front body. The tubular partition wall is formed with a tubular outer shell portion that forms the internal space, and a tongue portion that extends into the internal space,
The absorbent article according to claim 1 or 2, wherein the stretchable material for standing is fixed to the tongue portion. The absorbent article according to claim 3 , wherein the outer shell portion and the tongue portion are formed of an integral sheet material. An exterior sheet that is formed of a sheet material and has a pant-type shape in which one opening around the waist and a pair of openings around the legs are formed, and a pad shape in which the absorbent body is enclosed, on the inner surface side of the exterior sheet A fixed absorbent body,
The exterior sheet is configured by bonding the sheet material, an inner sheet disposed on the inner surface and an outer sheet disposed on the outer surface,
In the waist periphery portion of the exterior sheet, a stretch material around the stretched waist is fixed between the layers of the exterior sheet,
A stretchable belly stretchable material is fixed between the inner sheet and the outer sheet between the inner and outer sheets of the outer sheet.
The absorbent article according to any one of claims 1 to 4, wherein the absorbent main body is a pants-type disposable diaper in which the absorbent body, the top sheet, and the back sheet are configured in an integral pad shape. . At least one end portion of the front end portion and the rear end portion of the exterior sheet is folded back inward from the edge around the waist of the diaper to form a folded portion,
The absorbent article according to claim 5, wherein the tubular partition is formed by a sheet material constituting the folded portion. The folded portion is formed by a laminated portion of the inner sheet and the outer sheet,
The absorptive article according to claim 6 in which said tube-like partition is formed by the lamination portion of said inner sheet and said outer sheet. The inner sheet and the outer sheet are bonded so that the end of the other sheet protrudes from at least one of the front edge and the rear edge of one sheet to form a single layer portion,
At least a part of the single layer part is folded inside the diaper to form a folded part,
The folded portion is bonded to the surfaces of the inner sheet and the top sheet so as to cover one end of the absorbent main body,
The absorbent article according to claim 5, wherein the tubular partition is attached to the surface of the folded portion. The inner sheet and the outer sheet are bonded so that the end of the other sheet protrudes from at least one of the front edge and the rear edge of one sheet to form a single layer portion,
At least a part of the single layer part is folded inside the diaper to form a folded part,
The folded portion is bonded to the surface of the inner sheet and the top sheet so that a part thereof covers one end of the absorbent main body, and the other part forms the tubular partition. The absorbent article according to claim 5.   The absorbent article according to any one of claims 5 to 9, wherein the tubular partition is disposed in a portion around the waist of the exterior sheet instead of the elastic material around the waist of the exterior sheet. The inner sheet and the outer sheet are bonded so that the end of the other sheet protrudes from at least one of the front edge and the rear edge of one sheet to form a single layer portion,
At least a part of the single layer part is folded inside the diaper to form a folded part,
The folded portion is bonded to the surfaces of the inner sheet and the top sheet so as to cover one end of the absorbent main body,
The crotch part and the abdomen circumference part of the exterior sheet are configured by laminating the inner sheet and the outer sheet, and the waist circumference part is configured by laminating the single layer parts. The absorbent article according to claim 10.   The absorptive article according to any one of claims 5 to 11 with which said tube-like partition is arranged in at least one stomach circumference part among the front body and back body of an absorptive article.   The said tubular partition is arrange | positioned so that the both parts of the waist circumference part and abdominal circumference part of at least one of the front body and back body of an absorbent article may be covered. Absorbent articles.

Images