JP2010284231A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent leakage of a body fluid in a central area by securely fastening an absorbent article to underwear. <P>SOLUTION: The absorbent article 1 includes a front surface sheet 10 to abut to the skin of a wearer, a liquid-impermeable rear surface sheet 20 through which a liquid does not permeate, and an absorber 30. A pair of side sheets 201 and 202 extending in the longitudinal direction of the absorbent article at a prescribed interval in the lateral direction of the absorbent article are disposed on the front surface sheet 10. The absorbent article 1 has fixed areas 101 and 102 to be fixed to the underwear of the wearer on the surface of the rear surface sheet 20 opposite from the skin of the wearer. The fixed area 101 and the side sheet 201 are disposed to partially face each other in the direction of thickness of the absorbent article 1. The fixed area 102 and the side sheet 202 are disposed to partially face each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  An absorbent article comprising a top sheet having a contact surface that contacts the skin of the wearer, a liquid-impermeable back sheet that does not transmit liquid, and an absorber provided between the top sheet and the back sheet About.

  Conventionally, absorbent articles, such as a sanitary napkin and a panty liner, have a vertically long shape extending from the wearer's front side (abdomen side) to the back side (back side). In general, an absorbent article includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body provided between the top sheet and the back sheet.

  Some of such absorbent articles are provided with a gather (a leakage preventing part) that prevents body fluid from leaking out of the absorbent article. The gathers are provided along the longitudinal direction of the absorbent article, and have a shape that rises in the skin direction of the wearer in a central region corresponding to the wearer's crotch when worn on the underwear. Thereby, the adhesiveness of a wearer's skin and an absorbent article is improved in the center area | region.

Japanese Patent Laying-Open No. 2005-7075 (FIGS. 4 to 6)

  However, the following problems can be considered in the conventional absorbent article described above. In other words, depending on the movement of the wearer, the fastening between the absorbent article and the undergarment in the central region may be insufficient.

  In an absorbent article such as a sanitary napkin, it is desired that the absorbent article and the undergarment do not shift in the front-rear direction in the central region in accordance with the movement of the wearer, or that the absorbent article does not leave the undergarment. .

  Then, an object of this invention is to provide the absorbent article which can prevent that a center area | region bodily fluid leaks by stopping | fastening an absorbent article and underwear reliably.

  In order to solve the above-described problems, the present invention has the following features. That is, a top sheet (surface sheet 10) having a contact surface that contacts the skin of the wearer, a liquid-impermeable back sheet (back sheet 20) that does not transmit liquid, and the top sheet and the back sheet An absorbent article (absorbent article 1) including an absorbent body (absorbent body 30) provided therebetween, disposed on the top sheet, and having a predetermined interval in the width direction of the absorbent article. A pair of leak-proof portions (side sheets 201, 202) extending in the longitudinal direction of the absorbent article, and a surface opposite to the wearer's skin side of the back sheet, and the absorbent article A fixing region (adhesive material 100, fixing regions 101, 102) for fixing to the wearer's underwear, and corresponding to the fixing region and the leak-proof portion in plan view of the absorbent article; Regions partially overlap each other The gist of the Rukoto.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which can prevent that a bodily fluid leaks out from a center area | region can be provided by stopping | fastening an absorbent article and underwear reliably.

FIG. 1 is a plan view of an absorbent article 1 according to the first embodiment. 2 is a cross-sectional view taken along line F1-F1 'shown in FIG. FIG. 3 is a plan view of the absorbent article 2 according to the second embodiment. 4 is a cross-sectional view taken along line F3-F3 'shown in FIG. FIG. 5 is a plan view of the absorbent article 3 according to the third embodiment. 6 is a cross-sectional view taken along line F5-F5 'shown in FIG. FIG. 7 is a plan view of the absorbent article 4 according to the fourth embodiment. 8 is a cross-sectional view taken along line F7F-F7F 'shown in FIG. 9 is a cross-sectional view taken along line F7M-F7M 'shown in FIG. 10 is a cross-sectional view taken along line F7R-F7R 'shown in FIG. FIG. 11: is sectional drawing which shows the modification of the leak-proof part of 4th Embodiment. FIG. 12 is a cross-sectional view showing a modified example of the leakage preventing part of the fourth embodiment. FIG. 13 is a plan view of the absorbent article 5 according to the fifth embodiment. 14 is a cross-sectional view taken along line F13A-F13A 'shown in FIG. 15 is a cross-sectional view taken along line F13B-F13B 'shown in FIG.

  The absorbent article according to the present invention will be described with reference to the drawings. Specifically, the first to fifth embodiments will be described.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(First embodiment)
With reference to FIG.1 and FIG.2, the absorbent article 1 which concerns on 1st Embodiment of this invention is demonstrated. FIG. 1 is a plan view of an absorbent article 1 according to an embodiment of the present invention. 2 is a cross-sectional view taken along line F1-F1 ′ shown in FIG.

  The absorbent article 1 shown in FIG. 1 is a sanitary napkin, for example. As shown in FIG. 1, the absorbent article 1 has a front region F, a central region M, and a rear region R. The central region M contacts the skin surface around the wearer's vaginal opening. The front region F is in contact with the skin surface on the front side (abdomen side) of the wearer than the center region. The rear region R is in contact with the skin surface on the back side (back side) of the wearer than the center region.

  The absorbent article 1 includes a top sheet 10 that comes into contact with the wearer's skin, a liquid-impermeable back sheet 20 that does not transmit liquid, and an absorber 30. The top sheet 10 is provided with a pair of side sheets 201 and 202 having a predetermined interval in the width direction of the absorbent article 1 and extending in the longitudinal direction of the absorbent article 1.

  The absorbent article 1 has a fixing region for fixing to the underwear of the wearer on the surface opposite to the skin side of the wearer of the back sheet 20. Here, the fixed region is a region where an adhesive, an adhesive tape, a hook-and-loop fastener, or the like is disposed. In this embodiment, the area | region where the adhesive material for a wearer to fix the absorbent article 1 to underwear was coated is shown. Therefore, hereinafter, the fixing area is referred to as fixing areas 101 and 102 in which the adhesive material 100 is disposed.

  In the present embodiment, the adhesive 100 uses a hot-melt adhesive material that can be easily applied in an arbitrary pattern. The hot melt adhesive material is composed of a styrene polymer, a tackifier, and a plasticizer. As the styrene polymer, a styrene-ethylene-butylene-styrene block copolymer, a styrene-butadiene-styrene block copolymer, a styrene-isobutylene-styrene block copolymer, and the like can be used. In this embodiment, a styrene-ethylene-butylene-styrene block copolymer was used. The pressure-sensitive adhesive material is not limited to the above, and a room-temperature pressure-sensitive hot-melt adhesive (Hot Melt Adhesive) that is soft and can be sunk and adhered between fibers of the adherend at room temperature can be used.

  The fixed areas 101 and 102 are indicated by broken lines in FIG. As shown in FIG. 1, the region corresponding to the fixed region 101 and the region corresponding to the side sheet 201 partially overlap each other in the thickness direction of the absorbent article 1. The area corresponding to the fixed area 102 and the area corresponding to the side sheet 202 partially overlap each other. Moreover, the adhesive material 70 is apply | coated to the surface of the back surface sheet 20 which contacts a wearer's underwear along the longitudinal direction of the back surface sheet 20 (not shown in FIG. 1, refer FIG. 2). The adhesive material 70 is applied in a plurality of lines along the longitudinal direction of the back sheet 20.

  In this embodiment, the surface sheet 10 is a nonwoven fabric. The material of the top sheet 10 is not particularly limited as long as it is a sheet-like material having a structure that allows liquid to permeate, such as a woven fabric or a perforated plastic sheet. Either natural fibers or chemical fibers can be used as the woven or non-woven material.

  Examples of natural fibers include cellulose such as pulverized pulp and cotton. Examples of the chemical fiber include regenerated cellulose such as rayon and fibril rayon, semi-synthetic cellulose such as acetate and triacetate, thermoplastic hydrophobic chemical fiber, and thermoplastic hydrophobic chemical fiber subjected to hydrophilic treatment. Examples of thermoplastic hydrophobic chemical fibers include single fibers such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET), fibers formed by graft polymerization of polyethylene and polypropylene, and composite fibers such as a core-sheath structure. Can be mentioned.

  As the web forming method of the nonwoven fabric, any one of a dry method (a card method, a spun bond method, a melt blown method, an airlaid method, etc.) and a wet method can be used. A plurality of methods may be combined among the dry method and the wet method. Moreover, methods, such as thermal bonding, needle punching, and chemical bonding, are mentioned. The method for producing the nonwoven fabric is not limited to the above-described method.

  A spunlace formed into a sheet shape by the hydroentanglement method can also be used for the topsheet 10. Moreover, the nonwoven fabric which provided the unevenness | corrugation to the upper layer side of the nonwoven fabric, or the uneven nonwoven fabric which provided the fabric weight unevenness to the nonwoven fabric by applying air at the time of web formation can also be used for the surface sheet 10. By forming irregularities on the surface, it is possible to reduce the diffusion of body fluid through the surface of the topsheet 10 before passing through the topsheet 10.

  Next, the back sheet 20 will be specifically described.

In this embodiment, the back sheet 20 uses a film mainly composed of polyethylene, polypropylene, etc., a breathable resin film, a spunbond, or a sheet in which a breathable resin film is bonded to a nonwoven fabric such as spunlace. Can do. The back sheet 20 is preferably made of a material having flexibility that does not cause a sense of incongruity when worn. For example, it is preferable to use a film having mainly a low density polyethylene (LDPE) resin and a basis weight (weight per unit area (g)) in the range of 15 to 30 g / m ² .

  Next, the absorber 30 will be specifically described.

  The absorber 30 includes hydrophilic fibers and pulp. Examples of hydrophilic fibers include pulverized pulp, cellulose such as cotton, regenerated cellulose such as rayon and fibril rayon, semi-synthetic cellulose such as acetate and triacetate, particulate polymer, fibrous polymer, thermoplastic hydrophobic chemical fiber, or A thermoplastic hydrophobic chemical fiber or the like subjected to hydrophilic treatment can be used alone or in combination. Among these, it is preferable to use pulverized pulp in consideration of low cost and ease of forming the absorber.

  What mixed the polymer absorber with the hydrophilic fiber may be used as the absorber 30. In the present embodiment, the polymer absorber is a granular polymer such as a sodium acrylate copolymer having absorbency and hygroscopicity.

  The absorber 30 may be an air laid sheet obtained by forming hydrophilic fibers or powder into a sheet shape by the air laid method. When an air laid sheet is used as the absorber 30, the thickness of the air laid sheet is preferably 0.3 to 5.0 mm. As an example of an airlaid sheet, a fiber and particulate polymer formed into a sheet with a binder or the like can be cited. The particulate polymer may be dispersed in layers in the airlaid sheet, or may be biased in the thickness direction.

  Embossing may be formed in the absorber 30 in order to prevent loss of shape and twist during wearing, or to adjust the thickness. Embossing to the absorber 30 can be formed by passing the absorber between a patterned embossing roll and a flat roll. As the pattern of the embossing roll, a lattice shape, a dot shape, a wave shape, or the like is used, but a lattice pattern in which the thickness can be easily adjusted is preferable.

  Next, the side sheets 201 and 202 will be specifically described.

  The side sheets 201 and 202 are disposed on both sides of the absorbent body 30 on the surface of the top sheet 10. One end portion in the longitudinal direction of the side sheet 201 is substantially straight and overlaps with one end portion in the longitudinal direction of the topsheet 10. The other end in the longitudinal direction of the side sheet 201 matches the shape of a part of the outer periphery of the top sheet 10 and the back sheet 20.

  In order to prevent menstrual blood from passing over the side sheets 201 and 202 and flowing outward from the absorbent article 1, it is preferable to have hydrophobicity or water repellency. Specifically, a spunbond nonwoven fabric, an SMS nonwoven fabric, etc. are mentioned. The top sheet 10 and the side sheets 201 and 202 constitute a contact surface with the skin. That is, in the present embodiment, the side sheets 201 and 202 constitute a leak-proof portion that prevents body fluid that travels on the surface of the top sheet 10 from leaking to the outside of the absorbent article 1.

  As described above, the absorbent article 1 includes an area corresponding to the side sheets 201 and 202 functioning as a leak-proof portion and an area corresponding to the fixed areas 101 and 102 fixed to the underwear. In plan view, they overlap each other. In the center region corresponding to the wearer's crotch, the absorbent article 1 is particularly liable to slip or shift in the front-rear direction. On the other hand, according to the absorbent article 1, the absorbent article 1 and the undergarment can be securely fastened in the central region M, and the body fluid that travels on the surface of the topsheet 10 is absorbed in the central region M. It is possible to prevent leakage to the outside of the property article 1.

(Second Embodiment)
With reference to FIG.3 and FIG.4, the absorbent article 2 which concerns on 2nd Embodiment of this invention is demonstrated. FIG. 3 is a plan view of the absorbent article 2 according to the embodiment of the present invention. 4 is a cross-sectional view taken along line F3-F3 ′ shown in FIG. The absorbent article 2 and the absorbent article 1 have different shapes. The same components as those in the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted.

  In the absorbent article 2 shown in FIG. 3, the back sheet 20 has a central wing part 21 and a central wing part 22. A pair of the central wing part 21 and the central wing part 22 are formed at corresponding positions in the width direction of the absorbent article 2. The central wing part 21 and the central wing part 22 are extended in the width direction of the absorbent article 2 in the central region M. The width of the central region M of the back sheet 20 is larger than the widths of the front region F and the rear region R.

  The absorbent article 2 includes leak-proof portions 203 and 204 that are different from the side sheets. Leakproof portions 203 and 204 are disposed on both sides of the topsheet 10.

  The central wing portion 21 has a root portion 21a that is an attachment position to the absorbent article 2. In the absorbent article 2, the root portion 21 a is connected to a position where the width of the absorbent article 2 is the narrowest. The leak-proof portion 203 extends to the outside in the width direction of the absorbent article 2 from the root portion 21a. The leak-proof portion 203 is preferably bonded to the surface of the top sheet 10 on the skin side of the wearer at the joint portion 23 provided in the vicinity of the base portion 21a.

  Further, the central wing portion 22 has a root portion 22a that is an attachment position to the absorbent article 2. In the absorbent article 2, the root portion 22a is connected to a position where the width of the absorbent article 2 is the narrowest. The leak-proof portion 204 extends outward in the width direction of the absorbent article 2 from the root portion 22a. The leak-proof portion 204 is preferably bonded to the surface of the face sheet 10 on the skin side of the wearer at the joint portion 24 provided in the vicinity of the base portion 22a.

  Fixing regions 103 and 104 to which the adhesive 100 is applied are formed on the surface of the central wing portion 21 and the central wing portion 22 opposite to the skin side of the wearer. The area corresponding to the leakage preventing portions 203 and 204 and the area corresponding to the fixed areas 103 and 104 overlap each other in plan view of the absorbent article 2. The center wings 21 and 22 are folded back to the crotch part of the underwear.

  As described above, the central wing portions 21 and 22 are folded back to the crotch portion of the underwear, whereby the fixing regions 103 and 104 are bonded to the crotch portion of the underwear. Therefore, the center region M and the undergarment of the absorbent article 2 can be securely fastened, and in the center region M, body fluid that travels on the surface of the topsheet 10 can be prevented from leaking to the outside of the absorbent article 2. .

  Conventionally, in an absorbent article having a leak-proof portion corresponding to the leak-proof portions 203 and 204 of the absorbent article 2, the side of the absorbent article is fixed while the underwear is pulled up and attached after use. By being rubbed with the leg part of the wearer and the leak-proof part wearer, it is easy to receive a force dripping on the opposite side of the contact surface with the skin of the wearer of the underwear. In addition, there is a possibility that the absorbent article is attached in an unstable state along with the leakage preventing portion.

  On the other hand, in the absorbent article 2, fixing regions 103 and 104 to which the adhesive 100 is applied are formed on the surface of the central wing portions 21 and 22 opposite to the wearer's skin side. The absorbent article 2 can be stabilized at a predetermined position of the underwear when the absorbent article 2 is mounted by disposing the fixing regions 103 and 104 in the portion corresponding to the leak-proof portion. Therefore, it is possible to prevent the absorbent article 2 from being worn in a state where it is rolled up.

  Furthermore, when the leak-proof parts 203 and 204 are joined to the topsheet 10 by the joint parts 23 and 24, the leak-proof parts 203 and 204 are opposite to the contact surface with the skin of the wearer of the underwear when worn. It is possible to prevent the deformation that falls to the side.

(Third embodiment)
With reference to FIG.5 and FIG.6, the absorbent article 3 which concerns on 3rd Embodiment of this invention is demonstrated. FIG. 5 is a plan view of the absorbent article 3 according to the embodiment of the present invention. 6 is a cross-sectional view taken along line F5-F5 ′ shown in FIG. The absorbent article 3 and the absorbent article 1 have different shapes. The same components as those in the first and second embodiments are denoted by the same reference numerals and detailed description thereof is omitted.

  The absorbent article 3 shown in FIG. 5 has a front region F, a central region M, and a rear region R. The central region M contacts the skin surface around the wearer's vaginal opening. The front region F is in contact with the skin surface on the front side (abdomen side) of the wearer than the center region. The rear region R is in contact with the skin surface on the back side (back side) of the wearer than the center region.

  The absorbent article 3 is a sanitary napkin having a structure in which the rear region R of the absorbent article 1 is expanded rearward. The absorbent article 3 includes a top sheet 10 that comes into contact with the wearer's skin, a liquid-impermeable back sheet 20 that does not transmit liquid, and an absorber 30. The top sheet 10 is provided with a pair of side sheets 41 and 42 having a predetermined interval in the width direction of the absorbent article 3 and extending in the longitudinal direction of the absorbent article 3.

  The absorbent article 3 includes gathers 205 and 206 and a wing part 60. The gathers 205 and 206 are provided on both side edge portions 31 of the absorbent body 30 in a region including the central region M of the absorbent article 3. In the absorbent article 3, the gathers 205 and 206 manufactured as separate bodies are disposed at predetermined positions. The wing part 60 is provided outside the absorbent article 3 in the width direction of the absorbent article 3, and extends outward in the width direction of the absorbent body 30. In the present embodiment, the gathers 205 and 206 constitute a leakage preventing part.

  The wing part 60 includes the back sheet 20 and the side sheets 41 and 42. The wing part 60 is formed of a liquid-impermeable material. The wing part 60 is folded back to the crotch part (crotch part) of the underwear, and is provided on the wearer's rear side with respect to the central wing parts 61f and 62f that are fixed to the underwear, and the central wing parts 61f and 62f, and has a shape of the underwear And the rear wing portions 61r and 62r extending outward in the width direction of the absorbent article 3.

  The central wing portions 61f and 62f extend to the outside in the width direction of the absorber 30 in the central region M. The central wing portions 61f and 62f have root portions 61a and 62a connected to a position where the width of the absorbent article 3 is the narrowest. The rear wings 61r and 62r extend outward in the width direction of the absorber 30 in the rear region R on the rear side of the central wing portions 61f and 62f.

  The absorbent article 3 has fixing regions 105 and 106 in which the adhesive 100 is disposed on the surface of the central wing portion 60 opposite to the skin side of the wearer of the back sheet 20. The fixed areas 105 and 106 are indicated by broken lines in FIG. As shown in FIG. 5, in the plan view of the absorbent article 3, the region corresponding to the fixed region 105 and the region corresponding to the gather 205 partially overlap each other. The area corresponding to the fixed area 106 and the area corresponding to the gather 206 partially overlap each other. Moreover, the adhesive material 70 is apply | coated to the surface of the back surface sheet 20 which contacts a wearer's underwear along the longitudinal direction of the back surface sheet 20 (not shown in FIG. 5, refer FIG. 6). The adhesive material 70 is applied in a plurality of lines along the longitudinal direction of the back sheet 20.

  Next, the structure of the gathers 205 and 206 described above will be described.

  The gathers 205 and 206 are formed of a non-woven fabric or an apertured film. In the present embodiment, the gathers 205 and 206 are different sheets different from the top sheet 10 and the side sheets 41 and 42. The gathers 205 and 206 are disposed at least in the central region M of the absorbent article 3.

  As shown in FIG. 6, the gathers 205 and 206 stand up in the direction away from the topsheet 10 in the thickness direction (hereinafter referred to as the standing direction T) during use (when worn). That is, it stands up toward the wearer's skin side. Thereby, the gathers 205 and 206 prevent the wearer's body fluid from leaking from the absorbent article 3.

  In the present embodiment, the gather 205 is formed on the surface of the skin side of the wearer in the fixed end 221 joined to the topsheet 10 at positions corresponding to the edges on both sides in the width direction of the absorber 30 and the central wing portion 61f. And a central wing joint 231 to be joined. The fixing region 105 is formed at a position facing the gather 205 in the thickness direction of the absorbent article.

  Moreover, the gather 206 is joined to the surface of the wearer's skin side in the fixed end 222 joined to the topsheet 10 at positions corresponding to the edges on both sides in the width direction of the absorbent body 30 and the center wing portion 62f. A central wing joint 232. The fixing region 106 is formed at a position facing the gather 206 in the thickness direction of the absorbent article.

  As described above, in the absorbent article 3, when the central wing portion 61f is folded back to the crotch portion of the underwear and the fixing regions 105 and 106 are bonded to the crotch portion of the underwear, the surfaces at the central wing joint portions 231 and 232 The gathers 205 and 206 joined to the sheet 10 are fixed in a state of being opened outward in the width direction. Therefore, the center region M of the absorbent article 3 and the underwear can be secured.

  In the absorbent article having a gather, the contraction force of the gather works in the longitudinal direction of the absorbent article. For this reason, there is a tendency that the gathers are lifted due to the shrinkage of the gathers and the absorbent article is pulled away from the underwears after being locked to the underwears during use and before the underwears are pulled up and attached.

  On the other hand, the absorbent article 3 includes the fixing regions 105 and 106 at positions corresponding to the gathers 205 and 206, and is bonded to the topsheet 10 by the central wing bonding portions 231 and 232, and thus described above. In the situation, it is possible to prevent the gathers 205 and 206 from floating from the top sheet 10. Moreover, since it can prevent that the absorbent article 3 leaves | separates from underwear with the gathers 205 and 206, the absorbent article 3 can be reliably fastened to the appropriate position of underwear.

(Fourth embodiment)
With reference to FIG. 7 thru | or FIG. 9, the absorbent article 4 which concerns on 4th Embodiment of this invention is demonstrated. FIG. 7 is a plan view of the absorbent article 4 according to the embodiment of the present invention. 8 is a cross-sectional view taken along line F7F-F7F ′ shown in FIG. 9 is a cross-sectional view taken along line F7M-F7M ′ shown in FIG. 10 is a cross-sectional view taken along line F7R-F7R ′ shown in FIG. The absorbent article 4 and the absorbent article 3 differ in the form of gathers. The same components as those in the first to third embodiments are denoted by the same reference numerals and detailed description thereof is omitted.

  The absorbent article 4 has gathers 207 and 208. The gathers 207 and 208 are disposed on the top sheet 10 and have a predetermined interval in the width direction of the absorbent article 4 and extend in the longitudinal direction of the absorbent article 4. The gathers 207 and 208 extend from the front region F to the rear region R. In the present embodiment, the gathers 207 and 208 constitute a leakage preventing portion.

  The absorbent article 4 includes front wing parts 63 and 64, central wing parts 65 and 66, and rear wing parts 67 and 68. Each wing portion is constituted by a back sheet 20 and side sheets 41 and 42. Each wing is formed of a liquid-impermeable material.

  The front wing parts 63 and 64 are provided on the wearer's front side with respect to the central wing parts 65 and 66. The center wing parts 65 and 66 are folded back to the crotch part (the crotch part) of the underwear and stopped by the underwear. The rear wing portions 67 and 68 are provided on the rear side of the wearer relative to the central wing portions 65 and 66, and extend outward in the width direction of the absorbent article 4 along the shape of the underwear.

  The gathers 207 and 208 may be disposed in a predetermined position after being manufactured as separate bodies, or may be formed integrally with a sheet constituting the wing portion. In the absorbent article 4, the sheet | seat which comprises a wing part is folded back and formed.

  The adhesive material 100 is disposed in the fixing regions 107F and 108F on the surface of the front wings 63 and 64 opposite to the skin side of the wearer of the back sheet 20. The fixed areas 107F and 108F are indicated by broken lines in FIG. As shown in FIG. 7, in a plan view of the absorbent article 4, the region corresponding to the fixed region 107 </ b> F and the region corresponding to the gather 207 partially overlap each other. Also, the area corresponding to the fixed area 108F and the area corresponding to the gather 208 partially overlap each other.

  The gather 207 includes a fixed end 223 that is joined to the topsheet 10 at positions corresponding to both edges in the width direction of the absorbent body 30, and a front wing that is joined to the skin side surface of the wearer in the front wing portion 63. And a joint portion 233F. The gather 208 has a fixed end 224 joined to the topsheet 10 at positions corresponding to both side edges of the absorbent body 30 in the width direction, and a front wing joined to the skin side surface of the wearer in the front wing 64. And a joint portion 234F. In plan view of the absorbent article 4, the region corresponding to the fixed region 107F and the region corresponding to the front wing joint 233F overlap each other. The region corresponding to the fixed region 108F and the region corresponding to the front wing joint 234F overlap each other.

  Adhesive material 100 is disposed in fixing regions 107M and 108M on the surface of central wings 65 and 66 opposite to the wearer's skin side of back sheet 20. The fixed areas 107M and 108M are indicated by broken lines in FIG. As shown in FIG. 7, in a plan view of the absorbent article 4, the region corresponding to the fixed region 107 </ b> M and the region corresponding to the gather 207 partially overlap each other. The area corresponding to the fixed area 108M and the area corresponding to the gather 208 partially overlap each other.

  The gather 207 includes a fixed end 223 joined to the topsheet 10 at positions corresponding to both side edges of the absorbent body 30 in the width direction, and a center wing joined to the skin side surface of the wearer in the center wing 65. And a joint portion 233M. The gather 208 includes a fixed end 224 joined to the topsheet 10 at positions corresponding to both edges in the width direction of the absorbent body 30, and a center wing joined to the skin side surface of the wearer in the center wing portion 66. And a joint portion 234M.

  Adhesive material 100 is arranged in fixing regions 107R and 108R on the surface of rear wing portions 67 and 68 opposite to the skin side of the wearer of back sheet 20. The fixed regions 107R and 108R are indicated by broken lines in FIG. As shown in FIG. 7, in the plan view of the absorbent article 4, the region corresponding to the fixed region 107 </ b> R and the region corresponding to the gather 207 overlap each other. In addition, the area corresponding to the fixed area 108R and the area corresponding to the gather 208 overlap each other.

  The gather 207 includes a fixed end 223 joined to the topsheet 10 at positions corresponding to both edges of the absorbent body 30 in the width direction, and a back wing joined to the skin side surface of the wearer in the back wing 67. And a joint portion 233R. The gather 208 includes a fixed end 224 joined to the topsheet 10 at positions corresponding to both edges in the width direction of the absorbent body 30 and a back wing joined to the surface of the wearer's skin in the back wing 68. And a joint portion 234R. The region corresponding to the fixed region 107R partially overlaps the region corresponding to the rear wing joint 233R. The region corresponding to the fixed region 108R partially overlaps the region corresponding to the central wing joint 234M.

  Further, an adhesive 70 is applied in a line along the longitudinal direction of the back sheet 20 on the surface of the back sheet 20 that comes into contact with the wearer's underwear (not shown in FIG. 7, see FIGS. 8 to 10). ). The adhesive material 70 is applied in a plurality of lines along the longitudinal direction of the back sheet 20.

  As described above, in the absorbent article 4, the central wing portions 65 and 66 are folded back to the surface opposite to the skin side of the underwear and 107 M and 108 M are adhered, and the front wing portions 63 and 64 and the rear wing portion When the fixing regions 107F, 108M, 107R, and 108R provided in 67 and 68 are bonded to the underwear, the gathers 207 and 208 are fixed in a state of being opened outward in the width direction. Therefore, the gathers 207 and 208 do not fall toward the absorption surface, and the planar state can be maintained until the gathers 207 and 208 are mounted. In addition, even when worn, the gathers 207 and 208 can be prevented from falling toward the absorption surface, and the absorption surface can be secured. Accordingly, it is possible to secure the central region M and the undergarment of the absorbent article 4 and to prevent the body fluid that travels on the surface of the topsheet 10 from leaking outside the absorbent article 4 in the central region M.

  Further, in the absorbent article 4, the gathers 207 and 208 are joined to the seat portion constituting the wing portion by the central wing joint portions 233M and 234M, the front wing joint portions 233F and 234F, and the rear wing joint portions 233R and 234R. It is possible to prevent the gathers 207 and 208 from floating from the seat portion constituting the wing portion between the time when the absorbent article 4 is locked to the underwear and before the underwear is pulled up and attached. Moreover, since it can prevent that the absorbent article 4 leaves | separates from underwear with the gathers 207 and 208, the absorbent article 4 can be reliably fastened to the appropriate position of underwear.

(Gather variation)
The gathers are disposed so as to partially face each other in the region (fixed region) where the adhesive formed on the surface opposite to the skin side of the wearer of the back sheet is disposed, and in the thickness direction of the absorbent article. It only has to be. Therefore, the cross-sectional shape of the gather is not limited to the examples shown in FIGS. The gather shown as a modified example shall be formed over the front area | region F-back area | region R similarly to FIG. Therefore, the examples shown in FIGS. 8 to 10 can be applied to the position of the joint portion between the gather and the top sheet in the front region F to the rear region R and the folded shape of the gather. Therefore, in the modified example, only a representative location, a cross-sectional shape in the central region M (F7M-F7M ′ line shown in FIG. 7) will be described.

  11 and 12 are sectional views of gathers shown as modifications.

  A gather 209 shown in FIG. 11 includes a fixed end 225, a first leak-proof surface 251, a second leak-proof surface 252, and a third leak-proof surface 253. The gathers 209 are joined to the topsheet 10 at positions corresponding to the edges on both sides in the width direction of the absorber 30 at the fixed end 225. The first leak-proof surface 251 extends from the fixed end 225 toward the outer side in the width direction of the absorbent article.

  The second leak-proof surface 252 is folded at the end 251a of the first leak-proof surface 251 and extends toward the inner side in the width direction of the absorbent article. The third leak-proof surface 253 extends from the end 252a of the second leak-proof surface 252 toward the outer side in the width direction of the absorbent article. The gather 209 has a joint part 235 joined to the top sheet 10 at the end 253a of the third leak-proof surface 253.

  In the modification shown in FIG. 11, in the thickness direction of the absorbent article, the fixing region 109 in which the adhesive 100 is disposed and the gather 209 are arranged at positions that partially overlap each other. In addition, the fixed region 109 is disposed at a position overlapping the joint 235.

  A gather 211 shown in FIG. 12 has a fixed end 227, a first leak-proof surface 261, a second leak-proof surface 262, and a third leak-proof surface 263. The gathers 211 are joined to the topsheet 10 at positions corresponding to the edges on both sides in the width direction of the absorbent body 30 at the fixed end 227. The first leak-proof surface 261 extends from the fixed end 227 toward the outer side in the width direction of the absorbent article. The gather 211 has a joint portion 237 that is joined to the top sheet 10 at the end portion 261 a of the first leak-proof surface 261.

  The second leak-proof surface 262 is folded at the end 261a of the first leak-proof surface 261 and extends toward the inner side in the width direction of the absorbent article. The third leak-proof surface 263 extends from the end 262a of the second leak-proof surface 262 toward the outer side in the width direction of the absorbent article.

  In the modification shown in FIG. 12, in the thickness direction of the absorbent article, the fixing region 111 where the adhesive 100 is disposed and the gather 211 are arranged at positions that partially overlap each other. Specifically, in the thickness direction of the absorbent article, the fixed region 111 and a part of the third leak-proof surface 263 are arranged at positions that overlap each other.

(Fifth embodiment)
With reference to FIG. 13 thru | or FIG. 15, the absorbent article 5 which concerns on 5th Embodiment of this invention is demonstrated. FIG. 13 is a plan view of the absorbent article 5 according to the embodiment of the present invention. 14 is a cross-sectional view taken along line F13A-F13A ′ shown in FIG. 15 is a cross-sectional view taken along line F13B-F13B ′ shown in FIG. The absorbent article 5 and the absorbent article 4 differ in the form of gathers. The same components as those in the first to fourth embodiments are denoted by the same reference numerals and detailed description thereof is omitted.

  The absorbent article 5 has gathers 213 and 214. The gathers 213 and 214 are disposed on the top sheet 10, have a predetermined interval in the width direction of the absorbent article 5, and extend in the longitudinal direction of the absorbent article 5. The gathers 213 and 214 extend from the front region F to the rear region R. In the present embodiment, the gathers 213 and 214 constitute a leakage preventing part.

  Adhesive material 100 is arranged in fixing regions 109M and 110M on the surface opposite to the skin side of the wearer of back sheet 20 of central wings 65 and 66. The fixed areas 109M and 110M are indicated by broken lines in FIG. As shown in FIG. 13, in the plan view of the absorbent article 5, the region corresponding to the fixed region 109 </ b> M and the region corresponding to the gather 213 partially overlap each other. The area corresponding to the fixed area 110M and the area corresponding to the gather 214 partially overlap each other.

  The gather 213 includes a fixed end 229 joined to the topsheet 10 at positions corresponding to both side edges of the absorbent body 30 in the width direction, and a center wing joined to the skin side surface of the wearer in the center wing portion 65. And a joint portion 239M. A loop portion is formed between the fixed end 229 and the central wing joint portion 239M, and a hollow portion AR is formed.

  The gather 214 has a fixed end 230 that is joined to the topsheet 10 at positions corresponding to both edges in the width direction of the absorbent body 30 and a center wing that is joined to the skin side surface of the wearer in the center wing 66. And a junction 240M. A loop shape is formed between the fixed end 230 and the central wing joint 240M, and a hollow portion AR is formed.

  Adhesive material 100 is disposed in fixing regions 109R and 110R on the surface of rear wing portions 67 and 68 opposite to the skin side of the wearer of back sheet 20. The fixed regions 109R and 110R are indicated by broken lines in FIG. As shown in FIG. 13, in a plan view of the absorbent article 5, the region corresponding to the fixed region 109 </ b> R and the region corresponding to the gather 213 overlap each other. The area corresponding to the fixed area 110R and the area corresponding to the gather 214 overlap each other.

  As shown in FIG. 15, the gather 213 has a fixed end 229 joined to the topsheet 10 at positions corresponding to both edges in the width direction of the absorbent body 30, and the wearer's skin side in the rear wing portion 67. And a rear wing joint 239R joined to the surface. A loop is formed between the fixed end 229 and the rear wing joint 239R, and a hollow part AR is formed.

  As shown in FIG. 15, the gather 214 has a fixed end 230 that is joined to the topsheet 10 at positions corresponding to both edges in the width direction of the absorbent body 30, and the wearer's skin side in the rear wing portion 68. And a rear wing joint 240R joined to the surface. A loop shape is formed between the fixed end 230 and the rear wing joint 240R, and a hollow portion AR is formed.

  Further, an adhesive 70 is applied in a line along the longitudinal direction of the back sheet 20 on the surface of the back sheet 20 that comes into contact with the wearer's undergarment (not shown in FIG. 13, see FIGS. 13 and 14). ). The adhesive material 70 is applied in a plurality of lines along the longitudinal direction of the back sheet 20.

  As described above, in the absorbent article 5, the central wing portions 65 and 66 are folded back to the surface opposite to the skin side of the underwear and the 109M and 110M are adhered, and the front wing portions 63 and 64 and the rear wing portion When the fixing regions 109F, 110M, 109R, and 110R provided in 67 and 68 are bonded to the underwear, the gathers 207 and 208 are fixed in a state of being opened outward in the width direction. Therefore, the gathers 213 and 214 do not fall toward the absorption surface, and the planar state can be maintained until the gathers are attached. In addition, even when worn, the gathers 213 and 214 can be prevented from falling toward the absorption surface, and the absorption surface can be secured. Therefore, it is possible to secure the central region M and the undergarment of the absorbent article 5 and to prevent body fluid that travels on the surface of the topsheet 10 from leaking to the outside of the absorbent article 5 in the central region M.

  Further, in the absorbent article 5, since the gathers 213 and 214 are joined to the seat portion constituting the wing portion by the central wing joint portions 239M and 240M and the rear wing joint portions 239R and 240R, the absorbent article 5 is related to the underwear. It is possible to prevent the gathers 213 and 214 from floating from the seat portion constituting the wing portion between the stop and the time when the underwear is pulled up and attached. Moreover, since it can prevent that the absorbent article 5 leaves | separates from underwear with the gathers 213 and 214, the absorbent article 5 can be reliably fastened to the appropriate position of underwear.

(Other embodiments)
Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, the embodiment of the present invention can be modified as follows. Specifically, although the absorbent article 1 has been described as being a sanitary napkin, the absorbent article 1 is not limited thereto, and may be an incontinence pad, a panty liner, a disposable diaper, or the like.

  Moreover, the string-like body which has a stretching property in a longitudinal direction may be provided in the inside of a gather along the longitudinal direction. Furthermore, the material itself constituting the gathers may have elasticity. Of course, the gather shape and folding method may be other than those described in the above-described embodiments.

  Moreover, in embodiment mentioned above, it demonstrated that the fixed end of the gathers was joined to the surface sheet 10 in the position corresponding to the edge part of the both sides of the width direction of the absorber 30. FIG. However, the fixed end may be joined at a position overlapping the edge of the absorber 30.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

  DESCRIPTION OF SYMBOLS 1, 2, 3, 4, 5 ... Absorbent article, 10 ... Top sheet, 20 ... Back sheet, 21, 22 ... Center wing part, 21a, 22a ... Base part, 23, 24 ... Joint part, 30 ... Absorber 31 ... Both side edge portions, 41, 42 ... Side seats, 60 ... Central wing portion, 61f, 62f ... Central wing portion, 61r, 62r ... Rear wing portion, 61a, 62a ... Base portion, 63, 64 ... Front wing portion 65, 66 ... central wing part, 67, 68 ... rear wing part, 70 ... adhesive material, 100 ... adhesive material, 101, 102 ... fixed area, 103, 104 ... fixed area, 105, 106 ... fixed area, 107F, 108F , 107M, 108M, 107R, 108R ... fixed region, 109F, 110F, 109M, 110M, 109R, 110R ... fixed , 111 ... fixed area, 201 ... side sheet, 201, 202 ... side sheet, 203, 204 ... leakage prevention part, 205, 206 ... gather, 207, 208 ... gather, 209 ... gather, 211 ... gather, 213, 214 ... Gather, 221, 222, 223, 224, 225, 227, 229, 230 ... Fixed end, 231, 232 ... Central wing joint, 233F, 234F ... Front wing joint, 233M, 234M ... Central wing joint, 233R , 234R ... rear wing joint, 235, 237 ... joint, 239M, 240M ... central wing joint, 239R, 240R ... rear wing joint, 251 ... first leak-proof surface, 251a ... end, 252 ... second Leak-proof surface, 252a ... end, 253 ... third leak-proof surface, 53a ... end, 261 ... first leak-proof surface, 261a ... end, 262 ... second leakage preventing surface, 262a ... end, 263 ... third leak-proof surface

Claims (9)

A top sheet having a contact surface that contacts the skin of the wearer;
A liquid-impermeable back sheet that does not transmit liquid;
An absorbent article comprising an absorbent body provided between the top sheet and the back sheet,
A pair of leak-proof portions disposed on the surface sheet side and having a predetermined interval in the width direction of the absorbent article and extending in the longitudinal direction of the absorbent article;
It is arranged on the surface of the back sheet opposite to the skin side of the wearer, and has a fixing region for fixing the absorbent article to the wearer's underwear,
In a plan view of the absorbent article, the absorbent article is an area in which the area corresponding to the fixed area and the area corresponding to the leak-proof portion partially overlap each other. A wing portion extending outward in the width direction of the absorbent body in a central region corresponding to the crotch portion of the wearer;
The leak-proof portion extends to the outer side in the width direction of the absorbent article from the base portion that is the position where the wing portion is disposed on the absorbent article,
The absorbent article according to claim 1, wherein the fixed region is formed in the wing portion. The width of the absorbent article is partially different,
A wing portion extending outward in the width direction of the absorbent body in a central region corresponding to the crotch portion of the wearer;
The wing portion has a root portion connected to a position where the width of the absorbent article is narrower than the width of other positions of the absorbent article,
The leak-proof portion extends to the outside in the width direction of the absorbent article from the base portion,
The absorbent article according to claim 1, wherein the fixed region is formed in the wing portion. The leak-proof part has a fixed end joined to the topsheet at a position corresponding to the width direction inner side of the absorbent article, and an outer edge part located on the width direction outer side,
2. The absorbent article according to claim 1, wherein, in a plan view of the absorbent article, an inner edge portion of the fixed region located on the inner side in the width direction of the fixed region is located on an inner side than a position corresponding to the outer edge portion. The leak-proof part has a fixed end joined to the topsheet at a position corresponding to the width direction inner side of the absorbent article, and an outer edge part located on the width direction outer side,
In the plan view of the absorbent article, the leakage preventing part,
The fixed end;
The absorbent article according to claim 1, wherein the absorbent article is bonded to the top sheet at a wing bonding portion inside the position corresponding to the outer edge portion and outside the fixing end in the width direction.   The absorbent article according to claim 5, wherein the area corresponding to the fixed area and the area corresponding to the wing joint part partially overlap each other in plan view of the absorbent article. A rear wing portion provided on the outer side in the width direction of the absorbent article than the absorbent body, and extending outward in the width direction of the absorbent body in a rear region corresponding to the rear side of the wearer than the central region;
The absorptive article according to claim 1 which has a back fixation field which is arranged on the surface opposite to said wearer's skin side of said back wing part, and fixes said absorptive article to said wearer's underwear. The leak-proof portion is a fixed end joined to the topsheet at a position corresponding to the inner side in the width direction of the absorbent article,
A back joint part joined to the skin side surface of the wearer in the back wing part;
The absorptive article according to claim 7 in which a field corresponding to said back fixed field and a field corresponding to said back joined part overlap mutually in a plane view of said absorptive article.   The absorbent article according to claim 1, wherein the leakage preventing part has elasticity in a longitudinal direction of the absorbent article.

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