JP2013042882A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article capable of improving fittability to wearer's crotch, irrespective of having an absorbent laminate in which a plurality of absorbent bodies having a water-absorbing resin between nonwoven fabric sheets and having no pulp fabric are superimposed.SOLUTION: The absorbent article 1 includes a top sheet 2, a back sheet 3 and an absorbent laminate 10 formed therebetween. The absorbent laminate 10 has a first absorbent body 11 disposed on one side of a width direction x, and a second absorbent body 21 disposed on the other side of the width direction x. The first absorbent body 11 and the second absorbent body 21 have absorbent resins 13, 23 between the nonwoven fabric sheets 12, 22, respectively, and have no pulp fabric. The first absorbent body 11 and the second absorbent body 21 are disposed so that the first absorbent body 11 can be folded back at a first fold 17 extending in the longitudinal direction and the second absorbent body 21 can be folded back at a second fold 27 extending in the longitudinal direction, and the first fold 17 and the second fold 27 can face each other.

Description

  The present invention relates to absorbent articles such as urine pads (including light incontinence pads), sanitary napkins, disposable diapers and the like.

  DESCRIPTION OF RELATED ART Conventionally, the absorbent article which has an absorber (sheet-form absorber) which has a water absorbing resin between nonwoven fabric sheets and does not have a pulp fiber is known. For example, Patent Literature 1 discloses an absorbent article having an absorbent laminate in which a plurality of absorbent bodies each having a water-absorbent resin and having no pulp fiber are stacked between nonwoven fabric sheets. In Patent Document 2, an absorbent body having a water-absorbing resin between non-woven sheets and having no pulp fiber is formed in a crease in a region where the water-absorbing resin does not exist, and both ends in the width direction are folded inward. An absorbent article having a formed absorbent laminate is disclosed.

JP 2004-313580 A JP 2010-88529 A

  The absorbent body having a water-absorbing resin between the nonwoven fabric sheets and having no pulp fibers does not have pulp fibers, so that it can be formed thin while securing the absorption capacity, but the flexibility tends to be insufficient. Tend. In particular, in the absorbent articles disclosed in Patent Document 1 and Patent Document 2, it is difficult to bend the absorbent article because a plurality of absorbent bodies having a water-absorbing resin and not having pulp fibers are stacked between the nonwoven fabric sheets. In some cases, the fit between the wearer's crotch is poor. Furthermore, in the absorbent article disclosed in Patent Document 2, since both end portions in the width direction of the absorbent body are folded back inward, the thickness of both end portions in the width direction of the absorbent body is increased, so that the wearer's crotch There is a concern that the fit of the is inferior.

  This invention is made | formed in view of the said situation, The objective is also having an absorptive laminated body by which the absorber which has a water absorbing resin between nonwoven fabric sheets and which does not have a pulp fiber was laminated | stacked. Regardless, the object is to provide an absorbent article that can enhance the fit of the wearer into the crotch.

  The absorbent article of the present invention capable of solving the above problems is an absorbent article having a top sheet, a back sheet, and an absorbent laminate provided between the top sheet, the absorbent laminate, And a first absorber disposed on one side in the width direction and a second absorber disposed on the other side in the width direction, the first absorber and the first Each of the two absorbent bodies has a water absorbent resin between the nonwoven fabric sheets and has no pulp fiber, the first absorbent body is folded at the first fold line extending in the longitudinal direction, and the second absorbent body is disposed in the longitudinal direction. The first absorbent body and the second absorbent body are characterized in that the first absorbent body and the second absorbent body are disposed so that the first folded line and the second folded line are opposed to each other.

  The absorbent article of the present invention has the laminated absorbent body by the first absorbent body being folded at the first fold and the second absorbent body being folded at the second fold. And since the 1st absorber and the 2nd absorber are arranged along with the width direction, a crease is formed between the 1st absorber and the 2nd absorber, and an absorptive laminated body is bent in the width direction It becomes easy and the fit property to the crotch of the wearer of an absorptive layered product can be improved.

  Each of the first absorbent body and the second absorbent body includes a plurality of water absorbent resin existing regions in which a water absorbent resin is disposed between the nonwoven fabric sheets, and a water absorbent resin non-existing region between adjacent water absorbent resin present regions. The nonwoven fabric sheets are joined together in the water-absorbing resin-free region, the first absorbent body is folded back in the water-absorbing resin-free region extending in the longitudinal direction to form a first fold, and the second absorbent body It is preferable that the second crease is formed by folding back in the water-absorbing resin non-existing region extending in the longitudinal direction. By folding the first absorbent body and the second absorbent body in the region where the water absorbent resin is absent, the first absorbent body and the second absorbent body can be easily folded, and the folded first absorbent body and second absorbent body. It becomes easy to form a thin film.

  The first absorbent body is disposed on both sides of the water absorbent resin non-existing region where the first fold is formed, with the water absorbent resin non-existing regions provided via the water absorbent resin existing region overlapping each other, In the absorbent body, it is preferable that the water absorbent resin non-existing regions provided via the water absorbent resin existing regions overlap each other on both sides of the water absorbent resin non-existing region where the second fold is formed. . If the first absorbent body is formed in this way, in the first absorbent body, the diffusibility of body fluid is enhanced in the water absorbent resin-free region of the upper layer formed by folding the first absorbent body. In both cases, body fluid that has passed through the upper layer's water-absorbing resin-free region tends to migrate to the lower layer's water-absorbing resin-free region, and body fluid diffuses in the lower layer's water-absorbing resin-free region. It becomes easy to do. The same applies to the second absorber. As a result, the body fluid is quickly absorbed by the first absorber and the second absorber.

  In the first absorbent body and the second absorbent body, it is preferable that the nonwoven fabric sheets are heat-sealed in the water-absorbent resin-free region. In this case, the diffusibility of the body fluid such as urine in the region where the water absorbent resin is absent is enhanced, and the body fluid is efficiently absorbed by the first absorber and the second absorber.

  The absorptive layered product may have the 3rd absorber arranged on the upper side of the 1st absorber and the 2nd absorber. In this case, it is preferable that a 3rd absorber has a water absorbing resin between nonwoven fabric sheets, and does not have a pulp fiber. If the 3rd absorber which does not have pulp fiber between a nonwoven fabric sheet and has no pulp fiber is arranged on the upper side of the 1st absorber and the 2nd absorber, body fluids, such as urine received with an absorptive laminate, It becomes easy to diffuse on the third absorber in the width direction and the longitudinal direction. Therefore, the body fluid diffused on the third absorber is absorbed in a wide range by the third absorber, and further, the body fluid that has passed through the third absorber is absorbed by the first absorber and the second absorber. It is efficiently absorbed by the absorbent laminate.

  The third absorbent body has a plurality of water-absorbing resin-existing regions in which a water-absorbing resin is arranged between the nonwoven fabric sheets, and a water-absorbing resin non-existing region between adjacent water-absorbing resin existing regions. It is preferable that the nonwoven fabric sheets are joined to each other in the resin absence region, and the water absorbent resin absence region of the third absorbent body extends in the longitudinal direction so as to overlap the first fold line and the second fold line. Thus, if the 3rd absorber is provided with the water absorbent resin nonexistence field, it will become easy to bend the 3rd absorber in the water absorbent resin nonexistence field, and it will become easy to bend the absorptive laminate in the width direction.

  The absorptive layered product may have the 4th absorber arranged under the 1st absorber and the 2nd absorber. In this case, it is preferable that a 4th absorber is what has a water absorbing resin and a hydrophilic fiber. If the 4th absorber which has water absorption resin and a hydrophilic fiber is arranged under the 1st absorber and the 2nd absorber, it will pass between the 1st absorber and the 2nd absorber, and the 1st absorption. Body fluid such as urine that has moved to the lower side of the body and the second absorber is quickly absorbed by the fourth absorber, and the body fluid is prevented from leaking to the outside.

  An absorptive layered product may also have a 1st absorber of a plurality of layers, and a 2nd absorber of a plurality of layers. If the absorbent laminate is thus formed, it is easy to bend the absorbent laminate in the width direction while increasing the absorption capacity of the absorbent laminate.

  In the absorbent article of the present invention, the first absorbent body and the second absorbent body, which have a water absorbent resin between the nonwoven fabric sheets and do not have pulp fibers, are arranged side by side in the width direction. By forming a crease between the two absorbent bodies, the absorbent laminate can be easily folded in the width direction, and the fit of the absorbent laminate to the wearer's crotch can be enhanced.

An example of sectional drawing of an absorptive layered product is expressed. The other example of sectional drawing of an absorptive laminated body is represented. The other example of sectional drawing of an absorptive laminated body is represented. The other example of sectional drawing of an absorptive laminated body is represented. The top view of the urine pad as one embodiment of the absorbent article of this invention is represented. FIG. 6 is a cross-sectional view of the urine pad shown in FIG. 5 taken along the line AA.

  The absorbent article of the present invention includes a top sheet, a back sheet, and an absorbent laminate provided therebetween. Examples of the absorbent article of the present invention include urine pads (including incontinence pads), disposable diapers, sanitary napkins and the like.

  The shape of the absorbent article is not particularly limited. For example, when the absorbent article is a urine pad or a sanitary napkin, the shape of the absorbent article includes a substantially rectangular shape, an hourglass shape, a gourd shape, a battledore shape, and the like.

  When the absorbent article is a disposable diaper, the disposable diaper may be an open-type disposable diaper that is provided with a pair of fastening members on the left and right sides and formed into a pants shape when worn by the fastening member, and a waist opening And a pair of legged disposable diapers in which a pair of leg openings are formed.

  The top sheet is a sheet positioned on the wearer side when the absorbent article is worn, and is preferably liquid permeable. The back sheet is a sheet located on the side opposite to the wearer, that is, the outer side when the absorbent article is worn, and is preferably liquid-impermeable.

  A top sheet and a back sheet are comprised from the laminated body of a nonwoven fabric, a woven fabric, a knitted fabric, a plastic film, a plastic film, and a nonwoven fabric etc., for example. As a laminated body, what laminated | stacked the nonwoven fabric and the plastic film one layer at a time, and what laminated | stacked the plastic film on the nonwoven fabric are shown, for example. In addition, when using the laminated body containing a plastic film or a plastic film for a top sheet, it is preferable that the hole for allowing a liquid to pass through is formed in the plastic film. The top sheet is preferably composed of a nonwoven fabric. The backsheet is preferably composed of a nonwoven fabric or a plastic film.

  When using a nonwoven fabric as the top sheet and the backsheet, the nonwoven fabric is preferably produced by a spunbond method, an air-through method, a point bond method, a melt blow method, an airlaid method, or a combination of these production methods. Moreover, you may use the nonwoven fabric manufactured by SMS method which combined the spun bond method and the melt blow method.

  When using a nonwoven fabric as the top sheet and the backsheet, the material of the nonwoven fabric can be appropriately selected from synthetic fibers such as polyolefin (eg, polypropylene, polyethylene), polyester (eg, PET), polyamide, and natural fibers such as pulp and silk. . Moreover, you may use a composite fiber as a synthetic fiber. Among these, polypropylene, polyethylene, PET, or a composite fiber combining them is preferable. If such a nonwoven fabric is used, a sheet having high strength and excellent texture can be easily obtained.

  The absorbent laminate is provided between the top sheet and the back sheet and absorbs body fluids such as urine. An absorptive layered product has the 1st absorber arranged on one side of the width direction, and the 2nd absorber arranged on the other side of the width direction.

  The absorbent laminate has a longitudinal direction and a width direction. The “longitudinal direction” means a direction extending in the front-rear direction between the crotch of the wearer when the wearer wears the absorbent article. The “width direction” means a direction that is on the same plane as the absorbent laminate and is orthogonal to the longitudinal direction. A direction on the surface formed from the longitudinal direction and the width direction is defined as a plane direction. Furthermore, in the present invention, the “upper side” means the wearer side when the absorbent article is worn, and the “lower side” is the side opposite to the wearer when the absorbent article is worn, that is, the outer side. Means. The direction extending from the upper side to the lower side is defined as the vertical direction.

  The shape (planar shape) of the absorbent laminate is not particularly limited. What is necessary is just to determine the shape of an absorptive laminated body suitably according to a use, for example, a rectangle, an hourglass type, a gourd type, a battledore type etc. are mentioned.

  The shape (planar shape) of the first absorber and the second absorber is not particularly limited. In addition, it is preferable that a 1st absorber is a substantially line symmetrical shape with respect to a 2nd absorber, and a 1st absorber and a 2nd absorber extend in the width direction centerline (namely, longitudinal direction) of an absorptive laminated body. It is preferable to be arranged substantially line-symmetric with respect to the center line).

  Each of the first absorbent body and the second absorbent body has a water absorbent resin between the nonwoven fabric sheets and does not have pulp fibers. That is, the first absorbent body and the second absorbent body are each configured by providing a water-absorbing resin between the nonwoven fabric sheets, but no pulp fiber is provided between the nonwoven fabric sheets. Since a 1st absorber and a 2nd absorber do not have a pulp fiber between nonwoven fabric sheets, they can be formed thin, having a high absorption capacity. Hereinafter, an absorbent body having a water-absorbing resin between nonwoven fabric sheets and having no pulp fibers may be referred to as a “sheet-shaped absorbent body”.

  The water-absorbing resin provided in the sheet-like absorbent material includes polyacrylic acid-based water-absorbing resins such as sodium polyacrylate; starch-acrylonitrile graft copolymer, starch-acrylic acid graft copolymer, starch-acrylamide graft copolymer A starch-based water-absorbing resin such as a polymer; a polyvinyl alcohol-based water-absorbing resin such as a crosslinked polyvinyl alcohol can be used. As the water-absorbing resin, it is preferable to use a polyacrylic acid-based water-absorbing resin such as sodium polyacrylate because it has a high liquid absorption.

  The nonwoven fabric sheet used for the sheet-like absorbent body is liquid permeable, and as such a nonwoven fabric sheet, for example, hydrophilic fibers such as cellulose, rayon and cotton; hydrophobic fibers such as polyolefin, polyester and polyamide are surface-active. What is made hydrophilic with an agent may be used. As will be described later, when non-woven sheets are heat-sealed, a non-woven sheet obtained by hydrophilizing a hydrophobic fiber such as polyolefin or polyester with a surfactant from the viewpoint of easy heat-sealing. It is preferable to use it. The sheet-like absorbent body is formed, for example, by arranging a water-absorbing resin between two non-woven sheets or arranging a water-absorbing resin on the inner side where one non-woven sheet is folded.

  Each of the first absorbent body and the second absorbent body is formed by folding the sheet-like absorbent body in the width direction. That is, the first absorbent body is folded at the first fold line extending in the longitudinal direction, and the second absorbent body is folded at the second fold line extending in the longitudinal direction. And the 1st absorber and the 2nd absorber are arranged so that the 1st crease and the 2nd crease may counter mutually. If the first absorbent body and the second absorbent body are formed in this way, the absorbent laminate is formed by stacking two sheet-like absorbent bodies, and the absorbent capacity of the absorbent laminate is increased. It is done. And since the 1st absorber and the 2nd absorber are arranged along with the width direction, a crease is formed in the boundary between the 1st absorber and the 2nd absorber, and an absorptive layered product is made into a width direction It becomes easy to bend, and the fitting property to the crotch of the wearer of an absorptive laminate can be improved. Further, the first fold line and the second fold line tend to form a bulge bulging on the wearer side in the absorbent laminate. In this case, the bulge causes the wearer's crotch (especially for the female) It becomes easy to improve the fit to the urination part).

  The first absorbent body and the second absorbent body may be disposed apart from each other in the width direction, or may be disposed so as to contact each other. In addition, it is preferable that the 1st absorber and the 2nd absorber are not mutually adhere | attached from the point which makes it easy to bend an absorbent laminated body in the width direction.

  When the first absorber and the second absorber are arranged apart from each other, an absorber non-existing portion is formed between the first absorber and the second absorber. At this time, the separation distance between the first absorber and the second absorber is preferably as short as possible. Specifically, the length in the width direction of the absorber non-existing portion is preferably 10 mm or less, preferably 5 mm or less. More preferably, it is more preferably 3 mm or less, and even more preferably 2 mm or less. By arranging the first absorbent body and the second absorbent body in this way, the first absorbent body and the second absorbent body can be provided in a wider area, and body fluid such as urine has a large amount of absorbent non-existing portions. It is difficult to pass through and the leakage to the back sheet side can be suppressed.

  When it arrange | positions so that a 1st absorber and a 2nd absorber may mutually contact, the absorber contact part in which a 1st absorber and a 2nd absorber mutually contact will be formed. At this time, it is preferable that the portion where the first absorbent body overlaps the second absorbent body is as small as possible. Specifically, the length in the width direction of the absorbent body contact portion is preferably 5 mm or less, more preferably 3 mm or less. Preferably, it is 2 mm or less. Thus, by arranging the first absorbent body and the second absorbent body, it becomes easy to bend the absorbent laminate in the width direction.

  In order to facilitate the folding of the first absorbent body at the first fold, and to facilitate the folding of the second absorbent body at the second fold line, the water absorbent resin of the first absorbent body is disposed in the first fold line. Preferably, the second crease is formed in a region where the water absorbent resin of the second absorber is not disposed. That is, the first absorbent body and the second absorbent body are each non-existent between the nonwoven fabric sheets, between the plurality of water absorbent resin existing areas where the water absorbent resin is disposed, and between adjacent water absorbent resin existing areas. The nonwoven fabric sheets are joined together in the water-absorbing resin absence region, the first absorbent body is folded back in the water-absorbing resin absence region extending in the longitudinal direction to form a first fold, and the second It is preferable that the absorbent body is folded back in a region where the water absorbent resin does not exist extending in the longitudinal direction to form a second fold. The first absorbent body and the second absorbent body are hard to be formed in the water-absorbing resin-existing region and are difficult to be folded back in the region. By folding back, the first absorber and the second absorber can be easily folded back, and the folded first absorber and second absorber can be easily formed thin. More preferably, the first fold is formed in a water absorbent resin-free region extending in the longitudinal direction over the entire length of the first absorbent body, and the second fold is formed in the water absorbent area extending in the longitudinal direction over the entire length of the second absorbent body. It is formed in the resin absence region.

  The first absorbent body and the second absorbent body may have a water-absorbing resin non-existing region where the first fold line or the second fold line is not formed. For example, the first absorbent body and the second absorbent body are provided with a plurality of water absorbent resin non-existing regions extending in the longitudinal direction and a plurality of water absorbent resin existing regions extending in the longitudinal direction alternately in the width direction. At least one of the non-existing regions is not formed with the first fold or the second fold. If the first absorbent body and the second absorbent body have a water-absorbing resin non-existing region where the first fold or the second fold is not formed, the nonwoven fabric sheets are joined in the water-absorbing resin non-existing region. In the sealing part formed by the above, body fluid such as urine is easily diffused in the plane direction on the first absorber or the second absorber. The body fluid diffused in the plane direction is absorbed by the water absorbent resin disposed in the water absorbent resin existing region, and the body fluid is efficiently absorbed by the first absorbent body or the second absorbent body. More preferably, the water absorbent resin absence region where the first fold line or the second fold line is not formed extends in the longitudinal direction over the entire length of the first absorbent body or the second absorbent body.

  In the sealing portion, the body fluid easily moves to the lower absorbent body through the water-absorbing resin non-existing region, and as a result, the body fluid is efficiently absorbed by the lower absorbent body. For example, if a water absorbent resin non-existing region is formed in the upper layer formed by folding the first absorbent body, the body fluid is folded through the water absorbent resin non-existing region. It becomes easy to move to the lower layer of the absorber, and body fluid is efficiently absorbed even in the lower layer. As a result, the body fluid is quickly absorbed by the absorbent laminate.

  In the first absorbent body, the water absorbent resin non-existing region provided via the water absorbent resin existing region is arranged on both sides of the water absorbent resin non-existing region where the first fold is formed. Preferably, in the second absorbent body, the water absorbent resin non-existing region provided via the water absorbent resin existing region is arranged on both sides of the water absorbent resin non-existing region where the second fold is formed. It is preferable. If the first absorbent body and the second absorbent body are formed in this way, in the first absorbent body, urine or the like is formed in both the upper layer and the lower layer formed by folding the first absorbent body. In the second absorber, body fluid such as urine is efficiently absorbed in both the upper layer and the lower layer formed by folding the second absorber. Be absorbed. That is, in the first absorbent body, the diffusibility of body fluid is enhanced in the upper layer water-absorbing resin absence region, and the body fluid that has passed through the upper layer water-absorbing resin absence region is absorbed by the lower layer. It becomes easy to move to the resin non-existing region, and the body fluid easily diffuses in the water-absorbing resin non-existing region of the lower layer. The same applies to the second absorber. As a result, the body fluid is quickly absorbed by the first absorber and the second absorber.

  What is necessary is just to form the sealing part of a water absorbing resin non-existence area | region by joining nonwoven fabric sheets with an adhesive agent, or heat-sealing (thermal fusion | fusion) or ultrasonic bonding. From the viewpoint of increasing the diffusibility of body fluid such as urine in the sealing portion, the sealing portion is preferably formed by heat-sealing the nonwoven fabric sheets. Further, in order to achieve a good balance between the diffusibility and permeability of body fluid such as urine in the sealing portion, the nonwoven fabric sheets may be partially heat-sealed in the water-absorbent resin-free region. In this case, for example, the non-woven sheets may be partially heat-sealed by thermally fusing the non-woven sheets with a predetermined emboss pattern.

  When the sealing part is formed in the water-absorbing resin non-existing region, it is preferable that the sealing part maintains the bonding between the nonwoven fabric sheets even if the sheet-like absorbent absorbs water. For example, in the first absorbent body, it is preferable that the first absorbent body absorbs water and the joining of the nonwoven sheets of the first absorbent body is maintained. In the second absorbent body, the second absorbent body absorbs water. And it is preferable that the joining of the nonwoven fabric sheets of a 2nd absorber is maintained. When the sheet-shaped absorbent absorbs water, the water-absorbent resin disposed between the nonwoven fabric sheets swells, and the nonwoven fabric sheets in the sealing portion may be unbonded. In this case, it is difficult for body fluid to pass through the water-absorbing resin-free region, or the diffusibility of body fluid in the water-absorbing resin-free region is reduced. Therefore, it is preferable that the sealing part maintains the bonding between the nonwoven fabric sheets even if the sheet-like absorbent absorbs water.

In order to maintain the bonding between the nonwoven fabric sheets at the sealing portion, it is preferable to set the upper limit of the water absorbent resin content in the water absorbent resin existing region. Therefore, the water-absorbing resin content in the water-absorbent resin presence region is preferably 400 g / m ² or less, more preferably 385 g / m ^2. On the other hand, from the viewpoint of securing the absorption capacity in the water absorbent resin existing region, the water absorbent resin content in the water absorbent resin existing region is preferably 100 g / m ² or more, and more preferably 150 g / m ² or more.

  In order to maintain the bonding between the nonwoven fabric sheets at the sealing portion, it is also preferable to bond the nonwoven fabric sheets with a rubber-based adhesive or a styrene-based elastomer or to heat-seal them as described later.

  It is preferable that an adhesive is applied to the nonwoven fabric sheet of the sheet-like absorbent body to provide an adhesive layer, and the water absorbent resin in the water absorbent resin existing region is fixed to the nonwoven fabric sheet by the adhesive layer. The adhesive layer may be provided on at least one nonwoven fabric sheet sandwiching the water absorbent resin, but preferably the adhesive layer is provided on both nonwoven fabric sheets sandwiching the water absorbent resin. The water-absorbing resin disposed in the water-absorbing resin-existing region only needs to be at least partially fixed to the adhesive layer. For example, the water-absorbing resin in contact with the adhesive layer may be fixed to the adhesive layer. . If the water-absorbing resin is fixed to the nonwoven fabric sheet by the adhesive layer, the water-absorbing resin is less likely to move between the nonwoven fabric sheets before the water-absorbing resin absorbs water, ensuring the ability of the sheet-like absorbent body to absorb body fluid. It becomes easy to be done. Even after water absorption of the water-absorbent resin, the gelled water-absorbent resin is less likely to move between the nonwoven fabric sheets, so that the water-absorbent resin is agglomerated, making it difficult for the wearer to feel uncomfortable.

  When the adhesive layer is provided on the sheet-shaped absorbent body, it is preferable that the nonwoven fabric sheets are joined to each other in the water-absorbent resin non-existing region by the adhesive layer. In this case, even when the water absorbent resin disposed in the water absorbent resin existing region absorbs water and swells, the joining of the nonwoven fabric sheets, that is, the sealing portion is easily maintained.

  It is preferable that the adhesive layer does not inhibit water absorption or swelling by the water absorbent resin while fixing the water absorbent resin in the water absorbent resin existing region. In this respect, the adhesive layer is preferably formed in a net shape. As a method of forming the adhesive layer in a net shape, a curtain spray method, a spiral coating method, an omega coating method, or the like may be employed.

  Examples of the adhesive used for the adhesive layer include rubber adhesives such as natural rubber, butyl rubber and polyisoprene; styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer. Styrenic elastomers such as (SBS), styrene-ethylene-butadiene-styrene block copolymer (SEBS), styrene-ethylene-propylene-styrene block copolymer (SEPS); ethylene-vinyl acetate copolymer (EVA); polyester; Acrylic type; polyolefin type elastomer etc. can be used. These adhesives may use only 1 type and may use 2 or more types together. The adhesive preferably has an adhesive strength that can prevent the water-absorbing resin from falling off after water absorption, and has an elongation that can follow the swelling of the water-absorbing resin. Moreover, even if a water absorbing resin absorbs water and swells, what has the adhesive force of the grade which the joining of a nonwoven fabric sheet is maintained is preferable. In these respects, it is preferable to use a rubber adhesive or a styrene elastomer.

  A configuration example of the absorbent laminate will be described with reference to the drawings. FIG. 1 shows an example of a cross-sectional view in the width direction of the absorbent laminate. In the drawings of the present application, the arrow x represents the width direction, the arrow y represents the longitudinal direction, and the vertical direction to the surface formed by the arrows x and y represents the up-down direction z. In FIG. 1, the upper side of the figure corresponds to the upper side of the absorbent laminate, and the lower side of the figure corresponds to the lower side of the absorbent laminate. In addition, the structure of an absorptive laminated body is not limited to the embodiment shown in drawing.

  The absorbent laminate 10 illustrated in FIG. 1 includes a first absorber 11 disposed on one side in the width direction x and a second absorber 21 disposed on the other side in the width direction x. The first absorber 11 and the second absorber 21 are arranged side by side in the width direction x. The first absorbent body 11 is folded at the first fold line 17 extending in the longitudinal direction, the second absorbent body 21 is folded at the second fold line 27 extending in the longitudinal direction, and the first fold line 17 and the second fold line 27 are The 1st absorber 11 and the 2nd absorber 21 are distribute | arranged so that it may mutually oppose.

  In the first absorbent body 11, a water absorbent resin 13 is disposed between the nonwoven fabric sheets 12. Specifically, the first absorbent body 11 includes a plurality of water absorbent resin existing regions 14 in which the water absorbent resin 13 is arranged between the nonwoven fabric sheets 12 and a water absorbent resin non-exposed region between adjacent water absorbent resin existing regions 14. The nonwoven fabric sheets 12 are joined to each other in the water-absorbing resin non-existing region 15. An adhesive is applied to the nonwoven fabric sheet 12 to form an adhesive layer 16. In the water absorbent resin presence region 14, the water absorbent resin 13 is fixed to the nonwoven fabric sheet 12 by the adhesive layer 16, and in the water absorbent resin non-existence region 15, the nonwoven fabric sheets 12 are joined by the adhesive layer 16. In the first absorbent body 11, the water absorbent resin existing region 14 and the water absorbent resin absent region 15 extend in the longitudinal direction, respectively, and the water absorbent resin present region 14 and the water absorbent resin absent region 15 alternate in the width direction x. It is arranged in. The first absorbent body 11 is folded back at the water absorbent resin non-existing region 15 extending in the longitudinal direction to form the first fold line 17.

  The second absorber 21 is formed in the same manner as the first absorber 11. Therefore, the description regarding the second absorber 21 is the same as the above description regarding the first absorber 11. However, “first absorbent body 11”, “nonwoven fabric sheet 12”, “water absorbent resin 13”, “water absorbent resin presence region 14”, “water absorbent resin non-existence region 15”, “adhesive layer 16”, “ The “first folds 17” are respectively “second absorbent body 21”, “nonwoven fabric sheet 22”, “water absorbent resin 23”, “water absorbent resin existing region 24”, “water absorbent resin non-existing region 25”, “ The terms “adhesive layer 26” and “second fold line 27” are read.

  In the absorbent laminate 10 shown in FIG. 1, the first absorbent body 11 is folded at the first fold line 17, and the second absorbent body 21 is folded at the second fold line 27. Is formed. And the 1st absorber 11 and the 2nd absorber 21 are distribute | arranged so that the 1st crease | fold 17 and the 2nd crease | fold 27 may mutually oppose. Thus, if the 1st absorber 11 and the 2nd absorber 21 are formed, while the absorption capacity | capacitance of the absorptive laminated body 10 is raised, between the 1st absorber 11 and the 2nd absorber 21, or a boundary A crease is formed so that the absorbent laminate 10 can be easily folded in the width direction x. Further, the first fold line 17 and the second fold line 27 make it easier for the absorbent laminate 10 to form a bulge that bulges toward the wearer, and this bulge causes the wearer's crotch (especially female) to rise. Fit to the urination part).

  As shown in FIG. 1, the first absorbent body 11 has no water absorbent resin provided on both sides of the water absorbent resin absent area 15 where the first folds 17 are formed via the water absorbent resin present area 14. The regions 15 are preferably arranged so as to overlap each other. Similarly, the second absorbent body 21 has a water absorbent resin non-existing region 25 provided on both sides of the water absorbent resin non-existing region 25 where the second fold line 27 is formed via the water absorbent resin existing region 24. It is preferable that they are arranged to overlap each other. If the first absorbent body 11 and the second absorbent body 21 are thus formed, the body fluid that has passed through the water absorbent resin-free region 15 of the upper layer of the folded first absorbent body 11 The body fluid that easily diffuses in the longitudinal direction in the water-absorbing resin non-existing region 15 of the layer and passes through the water-absorbing resin non-existing region 25 of the upper layer of the folded second absorbent body 21 is absorbed by the lower layer. It becomes easy to diffuse in the longitudinal direction in the water absorbent resin non-existing region 25, and as a result, the body fluid is efficiently absorbed by the first absorbent body 11 and the second absorbent body 21.

  As described above, the absorbent laminate includes the first absorber disposed on one side in the width direction and the second absorber disposed on the other side in the width direction, but the absorbent laminate is the first. You may have absorbers other than an absorber and a 2nd absorber. For example, another absorber may be disposed above and / or below the first absorber and the second absorber.

  Hereinafter, other embodiments of the absorbent laminate will be described with reference to FIGS. 2 to 4 show other examples of cross-sectional views in the width direction of the absorbent laminate. In addition, below, description which abbreviate | omits the description which overlaps with description of the absorptive laminated body shown in FIG.

  The absorptive laminate 10 shown in FIG. 2 has a third absorbent body 31 disposed on the upper side of the first absorbent body 11 and the second absorbent body 21. The 3rd absorber 31 is a sheet-like absorber which has the water absorption resin 33 between the nonwoven fabric sheets 32, and does not have a pulp fiber. When the absorbent laminate 10 includes the third absorber 31 that is a sheet-like absorber in addition to the first absorber 11 and the second absorber 21, the third absorber 31 of the sheet-like absorber is the first absorber. 11 and the second absorber 21 are preferably arranged on the upper side. In this case, body fluid such as urine received by the absorbent laminate 10 easily diffuses in the width direction and the longitudinal direction on the third absorbent body 31, and the body fluid diffused on the third absorbent body 31 becomes the third absorbent body. 31 is absorbed in a wide range. And the bodily fluid which permeate | transmitted the 3rd absorber 31 is further absorbed by the 1st absorber 11 and the 2nd absorber 21, and a bodily fluid comes to be efficiently absorbed by the absorptive layered product 10. Moreover, since the 3rd absorber 31 can be formed thinly, even if it arrange | positions the 3rd absorber 31 above the 1st absorber 11 and the 2nd absorber 21, the absorptive laminated body 10 is width | variety. It becomes easy to bend in the direction x. The first fold line 17 and the second fold line 27 make it easy to form a bulge bulging on the wearer side on the surface of the third absorbent body 31, and this bulge causes the wearer's crotch of the absorbent laminate 10. Fit to (especially female urination) is improved.

  As shown in FIG. 2, the third absorbent body 31 absorbs water between the nonwoven fabric sheets 32 and between a plurality of water absorbent resin existing regions 34 in which the water absorbent resin 33 is arranged and adjacent water absorbent resin existing regions 34. It is preferable that the nonwoven fabric sheets 32 are joined to each other in the water-absorbing resin non-existing region 35. At this time, it is preferable that the water absorbent resin non-existing region 35 is formed so as to extend in the longitudinal direction, and as a result, the third absorbent body 31 is easily bent in the width direction x. More preferably, the water absorbent resin absence region 35 extends in the longitudinal direction over the entire length of the third absorbent body 31.

  In the 3rd absorber 31, it is preferable that the sealing part is formed by joining the nonwoven fabric sheets 32 in the water absorbing resin non-existence area | region 35. FIG. The description of the sealing part formed in the third absorbent body 31 is the same as the description of the sealing part of the first absorbent body 11 and the second absorbent body 21. Preferably, the non-woven fabric sheet 32 is heat-sealed between the third absorbent bodies 31 at the sealing portion. Furthermore, it is more preferable that the nonwoven fabric sheets 32 are partially heat-sealed at the sealing portion in order to achieve a good balance between the diffusibility and permeability of the body fluid at the sealing portion.

  It is preferable that the water absorbent resin absence region 35 of the third absorbent body 31 extends in the longitudinal direction so as to overlap the first fold line 17 and the second fold line 27. In FIG. 2, the water absorbent resin non-existing region 35 </ b> A overlaps the first fold line 17 and the second fold line 27. Thus, if the water absorbent resin absence region 35 of the third absorbent body 31 extends in the longitudinal direction so as to overlap the first fold line 17 and the second crease line 27, the absorbent laminate 10 is moved in the width direction x. It becomes easy to bend, and the fitting property to the crotch of the wearer of an absorbent article can be improved. Further, if the water absorbent resin absence region 35 of the third absorbent body 31 is provided so as to overlap the first fold line 17 and the second fold line 27, even if the water absorbent resin absent region of the third absorbent body 31 is provided. Even if the nonwoven fabric sheets 32 are heat-sealed and cured at 35, it becomes easy to bend the absorbent laminate 10.

  The water absorbent resin absence region 35 </ b> A provided so as to overlap the first fold line 17 and the second fold line 27 preferably extends in the longitudinal direction over the entire length of the third absorbent body 31. As described above, if the third absorbent body 31 is provided with the water absorbent resin non-existing region 35, the third absorbent body 31 can be easily bent at the water absorbent resin non-existing region 35. That is, it becomes easy to bend the absorbent laminate 10 in the width direction x.

  The third absorbent body 31 may have a water absorbent resin non-existing region 35 where the first fold line 17 and the second fold line 27 do not overlap. For example, a plurality of water absorbent resin non-existing regions 35 extending in the longitudinal direction and a plurality of water absorbent resin existing regions 34 extending in the longitudinal direction may be alternately provided in the width direction x. In FIG. 2, the third absorbent body 31 has a water absorbent resin existing region 34 on both sides of the water absorbent resin non-existing region 35 </ b> A that overlaps the first fold line 17 and the second fold line 27, and a first outer side on both sides. It has a water absorbent resin non-existing region 35 </ b> B that overlaps with the absorber 11 and a water absorbent resin non-existing region 35 </ b> C that overlaps with the second absorber 21. In this way, if the third absorbent body 31 is provided with the water absorbent resin non-existing regions 35B and 35C, the third absorbent body 31 through the first absorbent body 11 through these water absorbent resin non-existing regions 35B and 35C. Thus, the body fluid easily moves to the second absorbent body 21, and the body fluid is efficiently absorbed by the first absorbent body 11 and the second absorbent body 21.

  Furthermore, the water absorbent resin absence region 35B of the third absorbent body 31 is provided so as to overlap the water absorbent resin absent region 15 of the first absorbent body 11, and the water absorbent resin absent region 35C of the third absorbent body 31 is provided. Is preferably provided so as to overlap the water absorbent resin non-existing region 25 of the second absorbent body 21. That is, the third absorbent body 31 has a water absorbent resin non-existing region 35B that overlaps the water absorbent resin non-existing region 15 of the first absorbent body 11 and a water absorbent resin that overlaps the water absorbent resin non-existing region 25 of the second absorbent body 21. It is preferable to have the resin non-existing region 35C. In this way, if the third absorbent body 31 is provided with the water absorbent resin non-existing regions 35B and 35C, body fluids such as urine received by the absorbent laminate 10 are not present in the third absorbent body 31. After shifting to the upper surfaces of the first absorbent body 11 and the second absorbent body 21 through the regions 35B and 35C, the body fluid thus transferred is the water absorbent resin-free region 15 of the first absorbent body 11 and the first absorbent body. It becomes easy to diffuse in the longitudinal direction in the water absorbent resin non-existing region 25 of the two absorbent bodies 21. As a result, body fluid is efficiently absorbed by the first absorbent body 11 and the second absorbent body 21.

  As shown in FIG. 2, when the absorbent laminate 10 includes the first absorber 11, the second absorber 21, and the third absorber 31, the first absorber 11 and the second absorber 21 are the third absorber. Preferably, 31 is formed by folding back in the width direction x. In this case, the first absorbent body 11 and the second absorbent body 21 can be manufactured by providing a step of bending the third absorbent body 31 in the width direction x after the manufacturing process of the third absorbent body 31. The production of the conductive laminate 10 is facilitated and the production cost can be kept low.

  In FIG. 3, the absorptive laminated body 10 by which the 4th absorber 41 was distribute | arranged to the lower side of the 1st absorber 11 and the 2nd absorber 21 was shown. The fourth absorbent body 41 has a water absorbent resin 42 and hydrophilic fibers 43. Since the 4th absorber 41 has the hydrophilic fiber 43, it can absorb body fluids, such as urine, rapidly. Further, since the fourth absorbent body 41 includes the water absorbent resin 42, the body fluid absorbed by the hydrophilic fibers 43 can be fixed by the water absorbent resin 42.

  As the hydrophilic fiber 43, pulp fiber (preferably pulverized pulp fiber) or cellulose fiber can be used. The hydrophilic fiber 43 is preferably used as a fiber mass. As the water absorbent resin 42, a water absorbent resin that can be used for the sheet-like absorber may be used.

  As the fourth absorbent body 41, for example, a molded body obtained by mixing or spraying a water-absorbing resin in an aggregate of hydrophilic fibers is used, or this molded body is used as a paper sheet (for example, tissue paper) or a liquid-permeable nonwoven fabric sheet. Those covered with a covering sheet such as can be used.

  When the absorbent laminate 10 includes the fourth absorbent body 41, it is preferable that the fourth absorbent body 41 be disposed below the first absorbent body 11 and the second absorbent body 21. Since the fourth absorbent body 41 containing the water absorbent resin 42 and the hydrophilic fiber 43 can be formed relatively flexibly, the absorbent laminate 10 is added to the first absorbent body 11 and the second absorbent body 21 in the fourth. Even if it has the absorber 41, the bending to the width direction x of the absorbent laminated body 10 becomes difficult to be inhibited. And by arranging the 4th absorber 41 under the 1st absorber 11 and the 2nd absorber 21, it passes between the 1st absorber 11 and the 2nd absorber 21, and the 1st absorber 11 and Body fluid such as urine that has moved to the lower side of the second absorbent body 21 is quickly absorbed by the fourth absorbent body 41, and the body fluid is prevented from leaking to the outside.

  In FIG. 4, the absorptive laminated body 10 which has the 1st absorber 11 of multiple layers, and the 2nd absorber 21 of multiple layers was shown. As described above, the absorbent laminate 10 may be formed by laminating a plurality of the first absorbent bodies 11 or the second absorbent bodies 21. In this case, while absorbing the absorbent capacity of the absorbent laminate 10, the absorbent laminate 10 absorbs the absorbent laminate 10. It becomes easy to bend the conductive laminate 10 in the width direction x.

  When another absorber such as the third absorber 31 or the fourth absorber 41 is disposed above and / or below the first absorber 11 and the second absorber 21, the third absorber 31 or the second absorber The 4 absorbent body 41 is preferably bonded to the first absorbent body 11 and the second absorbent body 21 with an adhesive or the like. If the 3rd absorber 31 and the 4th absorber 41 have adhered to the 1st absorber 11 and the 2nd absorber 21, the 1st absorber 11 and the 2nd absorber 21 will be the 3rd absorber 31 and the 4th. It becomes easy to arrange | position to a desired position with respect to the absorber 41. FIG. In addition, it is preferable that the 1st absorber 11 and the 2nd absorber 21 are not mutually adhere | attached. If the adhesion of the first absorbent body 11 or the second absorbent body 21 to the third absorbent body 31 or the fourth absorbent body 41 is performed by, for example, a net-like adhesive layer in order to increase the permeability of the body fluid. Good.

  Although not shown in the drawings, a third absorber may be arranged below the first absorber 11 and the second absorber 21, and the upper side of the first absorber 11 and the second absorber 21. The fourth absorber may be arranged on the upper side, and both the third absorber and the fourth absorber may be arranged on the upper side and / or the lower side of the first absorber 11 and the second absorber 21. . Moreover, the 3rd absorber and / or the 4th absorber may be distribute | arranged to the upper side and / or the lower side of the 1st absorber 11 of multiple layers, and the 2nd absorber 21 of multiple layers.

  The absorbent article of the present invention is preferably provided with a pair of rising flaps on both sides in the width direction. By providing the rising flap, side leakage of excrement such as urine can be prevented. The rising flap is formed, for example, by joining side sheets extending in the longitudinal direction on both sides in the width direction of the top sheet and providing an elastic member inward in the width direction of the side sheet. By providing the side sheet and the elastic member in this manner, the inner side in the width direction of the side sheet rises toward the wearer's skin due to the contraction force of the elastic member, and a rising flap is formed. The rising flap or the side sheet is preferably composed of a liquid-impermeable plastic film, a liquid-impermeable nonwoven fabric, or the like.

  As an elastic member, the elastic elastic material used for absorbent articles, such as normal disposable diapers, such as a polyurethane thread, a polyurethane film, and natural rubber, can be used. The elastic member is preferably fixed in a stretched state with a hot melt adhesive. For example, a polyurethane yarn having a fineness of 100 to 2,500 dtex is stretched and arranged at a magnification of 1.1 to 5.0 times and fixed. As the joining means, a rubber-based hot melt adhesive is preferably used.

  Next, the absorbent article of the present invention will be described with reference to FIGS. 5 and 6 by taking a urine pad as an example. The present invention is not limited to the embodiments shown in the drawings. 5 and 6 show an absorbent article including the absorbent laminate 10 shown in FIG. FIG. 5: represents the top view which looked at the urine pad as an absorbent article from the top sheet side. 6 represents a cross-sectional view of the absorbent article of FIG. 5 along AA. In FIG. 5, the upper side of the figure corresponds to the front side of the absorbent article, and the lower side of the figure corresponds to the rear side of the absorbent article.

  The absorbent article 1 has a top sheet 2, a back sheet 3, and an absorbent laminate 10 provided therebetween. The top sheet 2 is arranged so as to face the wearer's skin, and transmits body fluid such as urine. The body fluid that has passed through the top sheet 2 is accommodated in the absorbent laminate 10. The back sheet 3 prevents body fluid from leaking to the outside.

  The absorptive laminate 10 includes a first absorbent body 11 disposed on one side in the width direction x and a second absorbent body 21 disposed on the other side in the width direction x. The first absorbent body 11 is folded back at the first fold line 17, the second absorbent body 21 is folded back at the second fold line 27, and the first absorbent body 11 and the second absorbent body 21 are connected to the first fold line 17 and the second fold line 21. The fold lines 27 are arranged so as to face each other. The detailed description of the absorbent laminate 10 is as described above.

  As shown in FIG. 6, an upper mount 4 is provided between the top sheet 2 and the absorbent laminate 10, and a lower mount 5 is provided between the back sheet 3 and the absorbent laminate 10. Is preferred. At this time, the upper mount 4 is preferably bonded to the first absorbent body 11 and the second absorbent body 21 with an adhesive or the like, and the lower mount 5 is bonded to the first absorbent body 11 and the second absorbent with an adhesive or the like. It is preferable to adhere to the absorber 21. The upper mount 4 and the lower mount 5 are provided in order to improve the diffusibility of body fluids such as urine and to prevent the absorbent laminate 10 from being deformed. The upper mount 4 is preferably liquid permeable, and the lower mount 5 may be liquid permeable or liquid impermeable. As the upper mount 4 and the lower mount 5, tissue paper, thin paper, crepe paper, or the like can be used.

  The absorbent article 1 is preferably provided with side sheets 6 extending in the longitudinal direction y on both sides of the top sheet 2 in the width direction x. The side sheet 6 is joined to the top sheet 2 at the joint 7. 5 and 6, the side seat 6 is provided with three standing elastic members 8 inward in the width direction x. When the absorbent article 1 is used, the inner side of the side sheet 6 rises toward the wearer's skin due to the contraction force of the standing elastic member 8, thereby preventing lateral leakage of excrement such as urine.

1: Absorbent article (urine pad)
2: Top sheet 3: Back sheet 10: Absorbent laminate 11: First absorber 17: First fold 21: Second absorber 27: Second fold 31: Third absorber 41: Fourth absorber 12, 22, 32: Nonwoven fabric sheet 13, 23, 33, 42: Water absorbent resin 14, 24, 34: Water absorbent resin existing region 15, 25, 35: Water absorbent resin non-existing region 43: Hydrophilic fiber

Claims (8)

An absorbent article having a top sheet, a back sheet, and an absorbent laminate provided therebetween,
The absorbent laminate has a longitudinal direction and a width direction, and has a first absorber disposed on one side of the width direction and a second absorber disposed on the other side of the width direction. And
Each of the first absorbent body and the second absorbent body has a water-absorbing resin between the nonwoven fabric sheets and does not have pulp fibers,
The first absorbent body is folded at a first fold extending in the longitudinal direction;
The second absorbent body is folded at a second fold extending in the longitudinal direction;
The absorbent article, wherein the first absorbent body and the second absorbent body are arranged so that the first fold line and the second fold line face each other. The first absorbent body and the second absorbent body are each non-existent between the nonwoven fabric sheets, between the plurality of water absorbent resin existing regions where the water absorbent resin is arranged, and between adjacent water absorbent resin existing regions. And the nonwoven fabric sheets are joined together in the water-absorbent resin non-existing region,
The first absorbent body is folded back in the water-absorbing resin absence region extending in the longitudinal direction to form a first fold line,
2. The absorbent article according to claim 1, wherein the second absorbent body is folded back in a water-absorbing resin non-existing region extending in the longitudinal direction to form a second fold. The first absorbent body is disposed on both sides of the water-absorbing resin absence region where the first fold is formed, with the water-absorbing resin absence region provided through the water-absorbing resin presence region overlapping each other,
In the second absorbent body, on both sides of the water-absorbing resin non-existing region where the second fold is formed, the water-absorbing resin non-existing regions provided via the water-absorbing resin existing region overlap each other. The absorbent article according to claim 2.   The absorbent article according to claim 2 or 3, wherein the first absorbent body and the second absorbent body are heat-sealed between non-woven fabric sheets in a water-absorbent resin-free region. The absorbent laminate has a third absorber disposed on the upper side of the first absorber and the second absorber,
The absorbent article according to any one of claims 1 to 4, wherein the third absorbent body has a water absorbent resin between the nonwoven fabric sheets and has no pulp fibers. The third absorbent body has a plurality of water absorbent resin existing regions in which a water absorbent resin is arranged between the nonwoven fabric sheets, and a water absorbent resin non-existing region between adjacent water absorbent resin existing regions. Non-woven sheets are joined in the non-existent resin region,
The absorbent article according to claim 5, wherein the water absorbent resin absence region of the third absorbent body extends in the longitudinal direction so as to overlap the first fold and the second fold. The absorbent laminate has a fourth absorber disposed below the first absorber and the second absorber,
The absorbent article according to any one of claims 1 to 6, wherein the fourth absorbent body has a water absorbent resin and hydrophilic fibers.   The absorbent article according to any one of claims 1 to 7, wherein the absorbent laminate includes a plurality of layers of the first absorber and a plurality of layers of the second absorber.

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