JP6226580B2 - Absorbent laminate and absorbent article - Google Patents

Description

  The present invention relates to an absorbent laminate used for absorbent articles such as urine pads (including light incontinence pads), sanitary napkins, disposable diapers, and the like, and an absorbent article provided with the same.

  DESCRIPTION OF RELATED ART Conventionally, the absorbent article provided with the 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 Literatures 1 and 2 disclose an absorbent article having an absorbent laminate in which two layers of sheet-like absorbers are laminated.

JP 2004-313580 A JP 2011-136078 A

  Since the sheet-like absorber described above does not have pulp fibers, it can be formed thin while securing an absorption capacity. However, since the water-absorbent resin gels or swells when it absorbs body fluids such as urine, the diffusibility of urine and the like may decrease when the sheet-like absorbent absorbs water, particularly from the upper sheet-like absorbent. The permeability of urine or the like to the side sheet member is likely to be hindered. Therefore, when forming a laminated body for absorption by stacking sheet-like absorbers, it is practical to laminate only two layers of sheet-like absorbers, and more sheet-like absorbers are laminated to increase the absorption capacity. That was difficult.

  The present invention has been made in view of the above circumstances, and an object thereof is to have an absorbent laminate that has a plurality of absorbent layers that have a water-absorbing resin between sheet members and that do not have pulp fibers, and can achieve a high absorption capacity. And providing an absorbent article.

  The absorbent laminate of the present invention capable of solving the above-mentioned problems is an absorbent laminate provided in an absorbent article; the absorbent laminate has a longitudinal direction and a width direction, and an upper side. An absorbent layer, a lower absorbent layer, and an intermediate absorbent layer disposed between the upper absorbent layer and the lower absorbent layer; each of the upper absorbent layer, the intermediate absorbent layer, and the lower absorbent layer is an upper sheet A sealing part having a water-absorbing resin between the member and the lower sheet member and having no pulp fiber, and a sealing part in which the sheet members are joined together and a non-sealing part in which the sheet members are not joined together The upper absorbent layer, the intermediate absorbent layer, and the lower absorbent layer each have an absorbent region in which a water-absorbent resin is disposed in the non-sealing portion; a buffer region as a region other than the absorbent region; The lower absorbent layer is characterized in that it has a larger absorption area than the intermediate absorbent layer. Having.

  In the absorbent laminate of the present invention, the upper absorbent layer and the lower absorbent layer are provided in a wider area than the intermediate absorbent layer, so that body fluids such as urine contained in the absorbent laminate are absorbent. It becomes easy to diffuse in a laminated body, and urine etc. become easy to be suitably absorbed into an absorptive laminated body. That is, the buffer region of the intermediate absorption layer functions as a diffusion passage for urine and the like, and the urine and the like are easily diffused in the planar direction and the vertical direction of the absorbent laminate, so As well as being able to contribute efficiently, urine and the like are also efficiently absorbed in the lower absorption layer. Moreover, since the buffer layer of the intermediate absorption layer is provided in a wide area, the buffer region of the intermediate absorption layer can function as a space that expands when the water absorbent resin in the absorption region of each absorption layer absorbs water and swells. become. As a result, urine and the like can be suitably absorbed in the absorption region of each absorption layer, and the absorption capacity of the absorbent laminate can be increased.

  The buffer region of the intermediate absorption layer is preferably provided so as to overlap the absorption region of the upper absorption layer and the absorption region of the lower absorption layer. When the absorbent laminate is configured in this manner, when the absorption region of the upper absorption layer and the lower absorption layer absorbs water and swells, it easily spreads to the buffer region of the intermediate absorption layer.

  It is preferable that the buffer region of the intermediate absorption layer is provided so as to overlap both the absorption region and the buffer region of the upper absorption layer. If the intermediate absorbent layer and the upper absorbent layer are thus provided, urine or the like received by the absorbent laminate passes through the buffer region of the upper absorbent layer and moves to the intermediate absorbent layer, and further the buffer of the intermediate absorbent layer. It becomes easy to diffuse in the plane direction in the region.

  For example, the intermediate absorption layer is preferably provided with a buffer region in at least a part of the region of the center 50% in the longitudinal direction and the center 50% in the width direction. If the buffer region is provided in the intermediate absorbent layer in this way, urine and the like are likely to diffuse inside the absorbent laminate, and the absorbent region disposed inside the absorbent laminate is suitable for absorbing urine and the like. Will be able to contribute. Moreover, it becomes easy to effectively function as a space which the buffer area | region of an intermediate | middle absorption layer spreads when the absorption area | region of each absorption layer swells. More preferably, in the intermediate absorbent layer, the region of the center 20% in the longitudinal direction and the center 15% in the width direction is composed only of the buffer region.

  The upper absorbent layer is preferably provided with a buffer region in at least a part of the region of the center 50% in the longitudinal direction and the center 50% in the width direction. If the upper absorbent layer is thus provided with a buffer region, it becomes easier to quickly transfer urine etc. received by the absorbent laminate to the intermediate absorbent layer through the buffer region of the upper absorbent layer. Is less likely to occur.

  The upper absorption layer and the intermediate absorption layer are preferably arranged in a stripe shape in which the buffer region extends in the longitudinal direction. If the buffer region is arranged in a stripe extending in the longitudinal direction between the upper absorption layer and the intermediate absorption layer, the diffusibility of urine and the like is increased in the upper absorption layer and the intermediate absorption layer, and the urine is absorbed in the intermediate absorption layer with the upper absorption layer. It is easy to migrate through the layer to the lower absorbent layer.

  The intermediate absorption layer may include a right intermediate absorption layer and a left intermediate absorption layer that are divided in the width direction, and a buffer region may be formed between the right intermediate absorption layer and the left intermediate absorption layer. If the intermediate absorption layer is formed in this way, a space for urine to diffuse inside the absorbent laminate is formed widely, and a sufficient space is easily secured when the absorption region of each absorption layer swells. Become.

  The upper absorbent layer and the intermediate absorbent layer may be formed by folding one end of a sheet-like absorbent body having a water-absorbing resin between the sheet members and having no pulp fiber in the buffer region in the width direction. . In this case, the intermediate absorption layer is formed from the folded end portions, and the upper absorption layer is formed from the central portion between the both end portions. If the upper absorbent layer and the intermediate absorbent layer are formed in this way, urine or the like that has passed through the upper absorbent layer is suitably guided to the buffer region of the intermediate absorbent layer, and urine or the like diffuses inside the absorbent laminate. It becomes easy and side leakage of urine or the like hardly occurs. Moreover, an absorptive laminated body can be manufactured easily.

  The present invention also provides an absorbent article provided with the absorbent laminate of the present invention. The absorptive article of the present invention can absorb urine etc. excreted from a wearer suitably with an absorptive layered product, and can realize high absorption capacity.

  In the absorbent laminate and the absorbent article of the present invention, the upper absorbent layer and the lower absorbent layer are provided in a larger area than the intermediate absorbent layer, so that the urine etc. contained in the absorbent laminate The body fluid can easily diffuse in the absorbent laminate, and the buffer region of the intermediate absorbent layer can function as a space that expands when the water absorbent resin in the absorbent region of each absorbent layer absorbs water and swells. As a result, urine or the like is suitably absorbed by the absorbent laminate, and a high absorption capacity can be realized.

The example of the absorption layer provided in the absorptive layered product of the present invention is expressed, and the width direction sectional view of an absorption layer is expressed. The partial notch top view of the absorption layer shown in FIG. 1 is represented. An arrangement example of the absorption region and the buffer region of the absorption layer is shown. The example of the width direction sectional drawing of an absorptive laminated body is represented. The example of the width direction sectional drawing of an absorptive laminated body is represented. The example of the width direction sectional drawing of an absorptive laminated body is represented. The example of the width direction sectional drawing of an absorptive laminated body is represented. The top view of a urine pad is represented as one embodiment of the absorbent article of this invention. The AA sectional view of the absorptive article (urine pad) shown in Drawing 8 is expressed.

  The absorbent laminate of the present invention is provided in absorbent articles such as urine pads (including incontinence pads), disposable diapers, and sanitary napkins. The absorbent laminate absorbs and fixes urine or the like received by the absorbent article, and is provided, for example, between the top sheet and the back sheet of the absorbent article.

  The absorbent laminate has a longitudinal direction and a width direction. The “longitudinal direction” means a direction extending in the front-rear direction of the wearer's crotch when the wearer wears the absorbent article provided with the absorbent laminate. 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. 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. A direction extending from the upper side to the lower side is defined as a 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 absorbent laminate of the present invention has an upper absorbent layer, a lower absorbent layer, and an intermediate absorbent layer disposed between the upper absorbent layer and the lower absorbent layer. The upper absorbent layer is disposed above the intermediate absorbent layer and the lower absorbent layer, and is disposed on the top sheet side in the absorbent article. The upper absorbent layer basically receives urine or the like that has passed through the top sheet and transferred to the absorbent laminate first before the intermediate absorbent layer and the lower absorbent layer. The upper absorbent layer is preferably disposed on the uppermost side of the absorbent laminate. The upper absorbent layer is preferably provided adjacent to the intermediate absorbent layer. The lower absorbent layer is disposed below the intermediate absorbent layer and the upper absorbent layer, and is disposed on the back sheet side in the absorbent article. The upper absorbent layer is preferably disposed on the lowermost side of the absorbent laminate. The lower absorbent layer is preferably provided adjacent to the intermediate absorbent layer. The intermediate absorption layer is disposed between the upper absorption layer and the lower absorption layer. An intermediate | middle absorption layer may be comprised only from 1 layer, and may be comprised from multiple layers. In the present invention, the upper absorption layer, the intermediate absorption layer, and the lower absorption layer may be simply referred to as “absorption layer”, respectively, but the “absorption layer” is selected from the upper absorption layer, the intermediate absorption layer, and the lower absorption layer. Means any layer.

  Each of the upper absorbent layer, the intermediate absorbent layer, and the lower absorbent layer is configured so as to have a water absorbent resin between the upper sheet member and the lower sheet member and no pulp fiber. That is, in the upper absorbent layer, the intermediate absorbent layer, and the lower absorbent layer, a sheet member is disposed on each of the upper and lower sides of each absorbent layer, and a water absorbent resin is disposed between these sheet members. Pulp fibers are not arranged between the sheet members. In the upper absorbent layer, the intermediate absorbent layer, and the lower absorbent layer, the presence of pulp fibers inevitably mixed in the production is allowed. The upper absorbent layer, the intermediate absorbent layer, and the lower absorbent layer are formed thin while having a high absorption capacity because they have a water absorbent resin between the upper sheet member and the lower sheet member and no pulp fibers. can do.

  Examples of water-absorbing resins include polyacrylic acid-based water-absorbing resins such as sodium polyacrylate; starch-acrylic graft copolymers, starch-acrylic acid graft copolymers, starch-acrylamide graft copolymers, and other starch-based water-absorbing resins. Water-absorbing resin: Polyvinyl alcohol-based water-absorbing resin such as 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 sheet member is liquid permeable, for example, a nonwoven fabric formed from hydrophilic fibers such as cellulose, rayon, and cotton, polyolefin (for example, polypropylene, polyethylene), polyester (for example, PET), polyamide (for example, nylon). It is possible to use a non-woven fabric formed from hydrophobic fibers such as those having a hydrophobic fiber surface hydrophilized with a surfactant. Further, a woven fabric, a knitted fabric, a perforated plastic film or the like may be used as the sheet member. Preferably, a non-woven sheet member (non-woven sheet) is used as the sheet member.

  In the upper absorbent layer, the intermediate absorbent layer, and the lower absorbent layer, the upper sheet member and the lower sheet member may be provided separately, one sheet member is folded, and the folded one side is the upper sheet member The other side may be the lower sheet member. Further, the lower sheet member of the upper absorbent layer may also serve as the upper sheet member of the intermediate absorbent layer, and the upper sheet member of the lower absorbent layer may also serve as the lower sheet member of the intermediate absorbent layer. . Preferably, each of the upper absorbent layer, the intermediate absorbent layer, and the lower absorbent layer includes a first sheet member disposed on the upper side of each absorbent layer and a second sheet member disposed on the lower side, and the first sheet member A water-absorbing resin is disposed between the second sheet member and the second sheet member. In this case, each absorption layer is formed independently (separably).

  Each of the upper absorbent layer, the intermediate absorbent layer, and the lower absorbent layer has a sealed portion in which the sheet members are joined together and a non-sealed portion in which the sheet members are not joined together. The sealing portion is formed by joining sheet members with an adhesive, heat sealing (thermal fusion), or ultrasonic bonding.

  The sealing portion is preferably provided on both sides across the portion where the water-absorbing resin is disposed. By providing the sealing portion in this manner, the water-absorbing resin is less likely to drop off from the absorbent layer. The sealing part may be provided on both sides in the width direction across the portion where the water absorbent resin is arranged, may be provided on both sides in the longitudinal direction, and is provided on both sides in the width direction and the longitudinal direction. May be. Preferably, the sealing portion is provided at least on both sides in the width direction across the portion where the water absorbent resin is disposed.

  The sealing portion may be provided so as to divide a portion where the water absorbent resin is arranged. If the sealing portion is provided in this manner, urine or the like can easily diffuse each absorbing layer in the plane direction, or can easily pass through each absorbing layer in the vertical direction through the sealing portion. As a result, the diffusibility of urine and the like in the absorbent laminate is enhanced, and urine and the like are quickly absorbed by the absorbent laminate.

  Even if each absorption layer absorbs water in the sealing portion, it is preferable that the bonding between the sheet members is maintained. When the absorbent layer absorbs water, the water-absorbing resin disposed between the sheet members swells, and there is a possibility that the bonding between the sheet members is released at the sealing portion. In this case, it is assumed that the water-absorbent resin falls off from each absorbent layer, or the diffusibility of urine and the like of the absorbent laminate decreases. Therefore, it is preferable that the sealing portion maintains the bonding between the sheet members even when the absorbing layer absorbs water. In order to make it easy to maintain the bonding between the sheet members at the sealing portion, the sheet members are made of rubber adhesive (for example, natural rubber, butyl rubber, polyisoprene, etc.) or styrene elastomer (for example, styrene- Isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butadiene-styrene block copolymer (SEBS), styrene-ethylene-propylene-styrene block copolymer (SEPS) or the like), thermal fusion or ultrasonic fusion.

  The non-sealing portion is defined as a portion where the sheet members are not joined to each other in each absorption layer, and the portion other than the sealing portion corresponds to the non-sealing portion. In the non-sealing portion, for example, a space is formed between the sheet member disposed on the upper side and the sheet member disposed on the lower side in each absorption layer, and a water absorbent resin may be disposed in the space. It does not have to be arranged. In the present invention, a region where the water-absorbing resin is disposed in the non-sealing portion is referred to as an absorption region. In each absorption layer, a region other than the absorption region is defined as a buffer region. That is, as for an absorptive layered product, each absorption layer has an absorption field where water-absorbing resin was arranged in a non-sealing part, and a buffer field as a field other than an absorption field. In addition, an absorption area | region and a buffer area | region are prescribed | regulated in the state which planarly viewed each absorber.

  The absorption region is configured by arranging a water absorbent resin between the sheet members. The absorption region is preferably formed so as to be surrounded by the sealing portion or the outer edge of each absorption layer. In addition, in the buffer region that can be formed in the non-sealing portion, the presence of the water-absorbing resin inevitably mixed in production is allowed, and the presence of the water-absorbing resin in the sealing portion is also allowed. The absorption region functions as a region that absorbs and fixes urine and the like in each absorption layer. On the other hand, the buffer region functions as a passage for diffusing urine and the like in the absorbent laminate. The buffer region can also function as a space that expands when the water-absorbing resin in the absorption region absorbs water and swells.

  It is preferable that the absorption region is formed so as to expand in the vertical direction of the absorbent laminate by absorbing and swelling the water absorbent resin. If the absorbent region is formed in this way, when the absorbent laminate absorbs urine or the like, the absorbent layer swells in the vertical direction in the absorbent region, so that a gap is easily formed between the absorbent layers. Tends to diffuse in the absorbent laminate.

  The buffer region is formed including a region where the sealing portion is formed and a region where the water absorbent resin is not disposed in the non-sealing portion. The buffer region may be formed by forming an opening in the absorption layer or dividing the absorption layer. In this case, the space between the openings or the divided absorption layers forms a buffer region. For example, the intermediate absorption layer may have a buffer region formed in this way. In addition, in order to improve the shape retention of the absorbent laminate, the upper absorbent layer and the lower absorbent layer are provided only in a region where the water absorbing resin is not disposed between the region where the sealing portion is formed and the non-sealing portion. It is preferable that it is comprised. That is, in the upper absorbent layer and the lower absorbent layer, it is preferable that the sheet member is disposed on the entire surface of each absorbent layer.

  The arrangement mode of the absorption region and the buffer region is not particularly limited. For example, the absorption region may be provided on almost the entire surface of the absorption layer, or may be provided partially on the absorption layer. Further, only one absorption region may be provided in one absorption layer, or a plurality of absorption regions may be provided. In addition, it is preferable that the absorption regions are arranged in stripes or islands at least in the upper absorption layer and the intermediate absorption layer. If the absorption region is provided in this way, it becomes easy for urine etc. contained in the absorbent laminate to pass through the upper absorbent layer and the intermediate absorbent layer and migrate to the lower absorbent layer. Ability improves.

  When the absorption regions are arranged in a stripe shape, it is preferable that at least two absorption regions are provided so as to extend in one direction, and buffer regions are provided on both sides of each absorption region. In this case, at least three buffer regions are provided. When the absorption region is arranged in a stripe shape, the sealing portion is also preferably arranged in a stripe shape. Preferably, the absorption region is arranged in a stripe shape extending in the width direction or the longitudinal direction, more preferably in a stripe shape extending in the longitudinal direction. If the absorption regions are arranged in stripes extending in the longitudinal direction, urine and the like are easily diffused in the longitudinal direction of the absorption layer, and urine and the like are easily absorbed in each absorption layer. Further, the absorption region can be provided in a relatively wide area, and the absorption amount of the absorption layer can be easily increased.

  When the absorption regions are arranged in an island shape, it is preferable that at least two absorption regions are provided, and a buffer region is provided so as to surround each absorption region. If the absorption region is arranged in an island shape, urine and the like are easily diffused in the plane direction of the absorption layer, and urine and the like are easily absorbed in each absorption layer.

The amount of the water absorbent resin which is arranged in the absorbent region is not particularly limited, 100 g / m ² or more, more preferably 150 g / m ² or more, preferably 400 g / m ² or less, and more is 385 g / m ² or less preferable. If the water-absorbing resin is disposed in the absorption region in an amount of 100 g / m ² or more, it is easy to increase the absorption capacity of the absorption layer. On the other hand, if the water-absorbing resin is disposed in the absorption region in an amount of 400 g / m ² or less, even if the water-absorbing resin absorbs water, the joining of the sheet members is easily maintained at the sealing portion.

  In the absorption region, the water absorbent resin is preferably fixed to the sheet member with an adhesive. That is, it is preferable that an adhesive is applied to the sheet member of the absorbent layer to provide an adhesive layer, and the water absorbent resin is fixed to the sheet member with the adhesive layer in the absorption region. The adhesive layer may be provided on at least one sheet member disposed on the upper side or the lower side of the water-absorbent resin. Preferably, the adhesive layer is provided on both the upper and lower sheet members. The water-absorbing resin disposed in the absorption region may 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-absorbent resin is fixed to the sheet member by the adhesive layer, the water-absorbent resin is difficult to move between the sheet members before the water-absorbent resin absorbs water, and the absorption capacity of urine and the like in the absorbent layer is ensured. 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 sheet members.

  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 absorption 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.

  The sealing portion may be formed by the adhesive layer. In this case, the sheet members are joined to each other by the adhesive layer provided by applying the adhesive to the sheet member, whereby a sealing portion is formed.

  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); polyolefin An elastomer or the like can be used. These adhesives may use only 1 type and may use 2 or more types together. Among these, it is preferable to use a rubber adhesive or a styrene elastomer.

  A configuration example of the absorption layer will be described with reference to FIGS. 1 and 2. 1 and 2 show an example of an absorption layer in which absorption regions are arranged in stripes, FIG. 1 shows a cross-sectional view in the width direction of the absorption layer, and FIG. 2 shows a partially cutaway plan view of the absorption layer. Represent. In the drawings, arrows x, y, and z represent the width direction, longitudinal direction, and vertical (thickness) direction of the absorbent laminate, respectively. The absorption layer shown in FIGS. 1 and 2 can be applied to the upper absorption layer, the intermediate absorption layer, and the lower absorption layer. However, the arrangement and size of the absorption region and the buffer region may be appropriately adjusted in each absorption layer. Good.

  The absorbent layer 1 includes a first sheet member 2 and a second sheet member 3, the first sheet member 2 is disposed on the upper side of the absorbent layer 1, and the second sheet member 3 is disposed on the lower side of the absorbent layer 1. The The water absorbent resin 5 is disposed between the first sheet member 2 and the second sheet member 3, and no pulp fiber is disposed between the first sheet member 2 and the second sheet member 3. An adhesive is applied to each of the first sheet member 2 and the second sheet member 3 to form an adhesive layer 4, and the water absorbent resin 5 is applied to the first sheet member 2 and the second sheet member 3 by the adhesive layer 4. It is fixed. The absorbent layer 1 includes a sealing portion 6 in which the first sheet member 2 and the second sheet member 3 are joined, and a non-sealing portion 7 in which the first sheet member 2 and the second sheet member 3 are not joined. In FIG. 1, the 1st sheet member 2 and the 2nd sheet member 3 are joined by the adhesive bond layer 4, and the sealing part 6 is formed. The absorption layer 1 has an absorption region 8 in which the water-absorbing resin 5 is disposed in the non-sealing portion 7 and a buffer region 9 as a region other than the absorption region 8. In FIG. 1 and FIG. 2, the buffer region 9 is composed of a region where the sealing portion 6 is formed and a region where the water absorbent resin of the non-sealing portion 7 is not disposed.

  As for the absorptive layered product of the present invention, the upper absorption layer and the lower absorption layer are provided in an area where the absorption region is wider than the intermediate absorption layer. In the absorbent laminate of the present invention, since each absorbent layer is configured in this way, urine or the like contained in the absorbent laminate is easily diffused in the absorbent laminate, and urine or the like is intermediate between the upper absorbent layer and the upper absorbent layer. It becomes easy to absorb suitably in each absorption layer of an absorption layer and a lower absorption layer. That is, since the intermediate absorption layer is present inside the absorbent laminate, for example, when the intermediate absorption layer is configured in the same manner as the upper absorption layer and the lower absorption layer, the water absorbent resin disposed in the intermediate absorption layer becomes urine. However, by providing the intermediate absorption layer with a larger area than the upper and lower absorption layers, the buffer area of the intermediate absorption layer functions as a diffusion passage for urine, etc. In addition, urine and the like easily diffuse in the planar direction and the vertical direction of the absorbent laminate. Moreover, since the buffer layer of the intermediate absorption layer is provided in a wide area, the buffer region of the intermediate absorption layer can function as a space that expands when the water absorbent resin in the absorption region of each absorption layer absorbs water and swells. become. As a result, urine and the like can be suitably absorbed in the absorption region of each absorption layer, and the absorption capacity of the absorbent laminate can be increased.

  In the absorbent laminate, as long as the upper absorption layer and the lower absorption layer are provided in an area where the absorption region is wider than the intermediate absorption layer, the arrangement of the absorption region and the buffer region of each absorption layer is not particularly limited. The buffer region of the intermediate absorption layer is preferably provided so as to overlap the absorption region of the upper absorption layer and the absorption region of the lower absorption layer. By configuring the absorbent laminate in this manner, when the absorption region of the upper absorption layer and the lower absorption layer absorbs water and swells, it easily spreads to the buffer region of the intermediate absorption layer. The buffer region of the intermediate absorption layer may be provided so that at least a part thereof overlaps with the absorption region of the upper absorption layer and the absorption region of the lower absorption layer.

  It is also preferable that the buffer region of the intermediate absorbent layer is provided so as to overlap the buffer region of the upper absorbent layer. If the buffer region of the intermediate absorbent layer is provided so as to overlap the buffer region of the upper absorbent layer, urine etc. received by the absorbent laminate can easily pass through the buffer region of the upper absorbent layer and migrate to the intermediate absorbent layer, It becomes easy to move to the lower absorption layer through the buffer region of the intermediate absorption layer. As a result, urine and the like are easily absorbed by the absorbent laminate.

  The buffer region of the intermediate absorption layer may be provided so as to overlap both the absorption region and the buffer region of the upper absorption layer. If the intermediate absorbent layer and the upper absorbent layer are thus provided, urine or the like received by the absorbent laminate passes through the buffer region of the upper absorbent layer and moves to the intermediate absorbent layer, and further the buffer of the intermediate absorbent layer. It becomes easy to diffuse in the plane direction in the region. That is, urine and the like received by the absorbent laminate are easily diffused widely in the planar direction inside the absorbent laminate, and urine and the like are suitably absorbed by each absorbent layer of the absorbent laminate.

  The buffer region of the intermediate absorbent layer may be provided so as to overlap the buffer region of the lower absorbent layer. If the buffer region of the intermediate absorption layer is provided so as to overlap the buffer region of the lower absorption layer, urine or the like easily moves to the lower absorption layer through the buffer region of the intermediate absorption layer, and further the buffer of the lower absorption layer. It becomes easy to diffuse in the plane direction in the region. As a result, the absorption region of the lower absorption layer can efficiently absorb urine and the like.

  The buffer region of the intermediate absorption layer may be provided so as to overlap both the absorption region and the buffer region of the lower absorption layer. If the intermediate absorption layer and the lower absorption layer are provided in this way, urine and the like easily diffuse over a wide range in the plane direction in the buffer region of the intermediate absorption layer. In the lower absorption layer, both the absorbability and diffusibility of urine and the like are easily exhibited.

  The upper absorbent layer is preferably provided with a buffer region in at least a part of the region of the center 50% in the longitudinal direction and the center 50% in the width direction. When the buffer region is provided in the upper absorbent layer in this manner, it becomes easier to quickly transfer urine or the like received by the absorbent laminate to the intermediate absorbent layer through the buffer region of the upper absorbent layer, and lateral leakage of urine or the like occurs. It becomes difficult. In this case, it is preferable that an absorption region is provided in at least a part of the region other than the center 50% in the longitudinal direction and the center 50% in the width direction of the upper absorption layer.

  In the upper absorbent layer, for example, the buffer region is preferably arranged in a stripe shape extending in the longitudinal direction or the width direction. When the buffer region of the upper absorbent layer is arranged in a stripe shape extending in the longitudinal direction, at least a part of the buffer region extends in the longitudinal direction at least a part of the central 50% region in the width direction of the upper absorbent layer. It is preferable to be provided. And it is preferable that an absorption area | region is provided in at least one part of areas other than the center 50% of the width direction of an upper side absorption layer. When the buffer region of the upper absorbent layer is arranged in a stripe shape extending in the width direction, at least a part of the buffer region extends in the width direction at least a part of the central 50% region in the longitudinal direction of the upper absorbent layer. It is preferable to be provided. And it is preferable that an absorption area | region is provided in at least one part of areas other than the center 50% of the longitudinal direction of an upper side absorption layer. Thus, by providing a buffer area | region in an upper side absorption layer, the diffusibility of urine etc. in an upper side absorption layer can be improved, ensuring the area of the absorption area | region of an upper side absorption layer. Moreover, it becomes easy to transfer urine etc. rapidly from an upper side absorption layer to an intermediate | middle absorption layer. More preferably, the upper absorbent layer is arranged in a stripe shape in which the buffer region extends in the longitudinal direction.

  The intermediate absorbing layer is preferably provided with a buffer region in at least a part of the region of the center 50% in the longitudinal direction and the center 50% in the width direction. If the buffer region is provided in the intermediate absorbent layer in this way, urine and the like are easily diffused inside the absorbent laminate, and the absorbent region arranged inside the absorbent laminate suitably contributes to the absorption of urine and the like. become able to. Moreover, it becomes easy to effectively function as a space which the buffer area | region of an intermediate | middle absorption layer spreads when the absorption area | region of each absorption layer swells. In this case, it is more preferable that the intermediate absorption layer is formed of only the buffer region in the region of the center 20% in the longitudinal direction and the center 15% in the width direction. In addition, when a buffer region is provided in at least a part of the region of the center 50% in the longitudinal direction and the center 50% in the width direction of the intermediate absorbent layer, the center 50% in the longitudinal direction and the center 50% in the width direction of the intermediate absorbent layer It is preferable that an absorption region is provided in at least a part of the other region.

  In the intermediate absorption layer, for example, the buffer region is preferably arranged in a stripe shape extending in the longitudinal direction or the width direction. When the buffer region of the intermediate absorption layer is arranged in a stripe shape extending in the longitudinal direction, at least part of the buffer region extends at least part of the central 50% region in the width direction of the intermediate absorption layer in the longitudinal direction. It is preferable to be provided. And it is preferable that an absorption area | region is provided in at least one part of areas other than the center 50% of the width direction of an intermediate | middle absorption layer. When the buffer region of the intermediate absorption layer is arranged in a stripe shape extending in the width direction, at least a part of the buffer region extends in the width direction at least a part of the central 50% region in the longitudinal direction of the intermediate absorption layer. It is preferable to be provided. And it is preferable that an absorption area | region is provided in at least one part of areas other than the center 50% of the longitudinal direction of an intermediate | middle absorption layer. By providing the buffer region in the intermediate absorption layer in this way, the diffusibility in the intermediate absorption layer is enhanced and it is easy to prevent side leakage of urine and the like from the intermediate absorption layer. More preferably, the intermediate absorption layer is arranged in a stripe shape in which the buffer region extends in the longitudinal direction.

  In the intermediate absorption layer, a buffer region may be formed such that the absorption region is arranged in an island shape. In this case, it becomes easy to provide the buffer region with a large area (that is, it becomes easy to narrow the area of the absorption region), and the diffusibility of urine or the like in the intermediate absorption layer is enhanced. Further, when the absorption region of each absorption layer swells, it easily spreads to the buffer region of the intermediate absorption layer, and urine and the like are suitably absorbed in the absorption region of each absorption layer.

  Contrary to the embodiment described above, for example, the intermediate absorption layer may be configured such that at least a region of 20% in the center in the longitudinal direction and 15% in the center in the width direction is composed of only the absorption region. In this case, it is preferable that the intermediate absorption layer is disposed so that the absorption region extends in the longitudinal direction in the region of the center 15% in the width direction. By providing an absorption region in the intermediate absorption layer in this way, even if the absorption region of the intermediate absorption layer absorbs water and swells in the vertical direction, for example, it fits the urination part of a female wearer and improves the wearing feeling Can do. In this case, it is preferable that both sides in the width direction of the absorption region are constituted by buffer regions, and as a result, both side portions in the width direction of the intermediate absorption layer are effective as spaces that expand when the absorption region of each absorption layer swells. It becomes easy to improve the absorption performance in the both sides of the width direction of an absorptive layered product. Therefore, the effect of preventing side leakage of urine or the like is enhanced.

  The intermediate absorption layer may be formed by being divided in the width direction or the longitudinal direction. For example, the intermediate absorption layer may be configured by a right intermediate absorption layer and a left intermediate absorption layer that are divided in the width direction, and a buffer region may be formed between the right intermediate absorption layer and the left intermediate absorption layer. The intermediate absorption layer may be composed of a front intermediate absorption layer and a rear intermediate absorption layer that are divided in the longitudinal direction, and a buffer region may be formed between the front intermediate absorption layer and the rear intermediate absorption layer. . If the intermediate absorption layer is formed in this way, a space for urine to diffuse inside the absorbent laminate is formed widely, and a sufficient space is easily secured when the absorption region of each absorption layer swells. Become. When the intermediate absorption layer is formed by dividing in the width direction or the longitudinal direction, the buffer region is preferably arranged in a stripe shape extending in the length direction or the width direction, and the absorption region is also a stripe extending in the length direction or the width direction. It is preferable to arrange in a shape. When the intermediate absorption layer is formed by being divided, the intermediate absorption layer is more preferably formed by being divided in the width direction.

  As long as the lower absorption layer is provided in a larger area than the intermediate absorption layer, the arrangement of the absorption region and the buffer region is not particularly limited. The lower absorbent layer is preferably configured to absorb urine and the like over as wide a range as possible, and the absorbent region is preferably provided in a larger area than the upper absorbent layer. From this point, the lower absorption layer may be configured almost entirely from the absorption region. Specifically, the lower absorption layer absorbs at least a region having a center of 75% in the longitudinal direction and a region having a center of 75% in the width direction (preferably a region having a center of 80% in the longitudinal direction and a center of 80% in the width direction). You may comprise only. Thus, by providing an absorption area | region in a lower side absorption layer, the rigidity of a lower side absorption layer can be improved and it becomes easy to prevent that an absorptive laminated body is twisted or distorted.

  When it is desired to ensure diffusibility of urine or the like in the lower absorption layer, the buffer region may be arranged in a stripe shape extending in the longitudinal direction or the width direction. In this case, it is preferable to arrange the buffer region in a stripe shape extending in the longitudinal direction. By forming the buffer region in this manner, the diffusibility of urine or the like in the lower absorption layer is enhanced.

  3A to 3D show examples of arrangement of the absorption region and the buffer region of the absorption layer. In FIGS. 3A to 3D, the absorption area is filled and displayed.

  FIG. 3A shows an example in which the absorption regions are arranged in an island shape. If the absorption layer shown in FIG. 3A is used for the intermediate absorption layer, it is easy to form the absorption region with a small arrangement area. Further, in the absorbent layer shown in FIG. 3 (a), the region of the center 20% in the longitudinal direction and the center 15% in the width direction is composed only of the buffer region. The diffusibility of urine etc. in the inside is increased.

  FIG. 3B shows an example of the absorption layer in which the absorption region and the buffer region are arranged in a stripe shape extending in the longitudinal direction. The absorbing layer shown in FIG. 3B has a buffer region formed in the center in the width direction, and is preferably used for the intermediate absorbing layer. By using the absorption layer shown in FIG. 3B as the intermediate absorption layer, the diffusibility of urine and the like inside the absorbent laminate is enhanced.

  The absorption layer shown in FIG. 3 (c) has an absorption region formed in the center in the width direction, opposite to the absorption layer shown in FIG. 3 (b), and both sides in the width direction are composed of buffer regions. Yes. If the absorption layer shown in FIG. 3C is used for the intermediate absorption layer, the absorption region absorbs water and swells, thereby improving the fit of the female wearer to the urine drainage portion.

  FIG. 3D shows an example of an absorption layer in which almost the entire surface is composed of an absorption region. The absorbent layer shown in FIG. 3D is suitably used for the lower absorbent layer.

  In the absorbent laminate of the present invention, it is preferable that the buffer region is arranged in a stripe shape extending in the longitudinal direction between the upper absorbent layer and the intermediate absorbent layer. In this case, the upper absorption layer and the intermediate absorption layer are provided with buffer regions (end buffer regions) at both ends in the width direction, and another buffer region (inner buffer region) is provided between these buffer regions. At least one is preferably provided. In this case, as described above, the inner buffer region of the intermediate absorption layer is preferably provided so as to overlap the absorption region of the upper absorption layer and the absorption region of the lower absorption layer. Moreover, it is preferable that the inner buffer region of the intermediate absorbent layer is provided so as to overlap the inner buffer region of the upper absorbent layer. Furthermore, it is preferable that the inner buffer region of the intermediate absorption layer is provided so as to overlap both the absorption region and the inner buffer region of the upper absorption layer.

  As described above, it is preferable that the lower absorption layer is almost entirely composed of an absorption region, or the buffer region is arranged in a stripe shape extending in the longitudinal direction. When the buffer region of the lower absorbent layer is arranged in a stripe shape, the lower absorbent layer is provided with buffer regions (end buffer regions) at both ends in the width direction, and between these buffer regions. It is preferable that at least one other buffer region (inner buffer region) is provided. In the same manner as described above, it is preferable that the inner buffer region of the intermediate absorbent layer is provided so as to overlap the inner buffer region of the lower absorbent layer. Furthermore, the inner buffer region of the intermediate absorbent layer may be provided so as to overlap both the absorbent region and the inner buffer region of the lower absorbent layer.

  The upper absorbent layer and the intermediate absorbent layer may be formed by folding back one sheet-like absorbent body that has a water-absorbent resin and does not have pulp fibers between sheet members. In this case, the upper absorbent layer and the intermediate absorbent layer are formed by folding both end portions in the width direction of the sheet-like absorber, and an intermediate absorbent layer is formed from the folded both end portions, and a central portion between both end portions. It is preferable that an upper absorption layer is formed. If the upper absorbent layer and the intermediate absorbent layer are formed in this way, urine or the like that has passed through the upper absorbent layer is suitably guided to the buffer region of the intermediate absorbent layer, and urine or the like is likely to diffuse inside the absorbent laminate. In addition, side leakage of urine and the like is less likely to occur. Moreover, an absorptive laminated body can be manufactured easily.

  Moreover, a lower side absorption layer and an intermediate | middle absorption layer may be formed by folding up one sheet-like absorber which has a water absorbing resin between sheet members, and does not have a pulp fiber. In this case, the lower absorbent layer and the intermediate absorbent layer are formed by folding both end portions in the width direction of the sheet-like absorber, and the intermediate absorbent layer is formed from the folded both end portions, and the center between the both end portions is formed. The lower absorbent layer is preferably formed from the part. If the lower absorption layer and the intermediate absorption layer are formed in this way, even if a large amount of urine etc. migrates to the buffer area of the intermediate absorption layer at a time, or the urine etc. spreads widely in the lower absorption layer Lateral leakage such as urine is less likely to occur. Moreover, an absorptive laminated body can be manufactured easily.

  As described above, when the upper absorbent layer and the intermediate absorbent layer or the lower absorbent layer and the intermediate absorbent layer are composed of one sheet-like absorbent body, the sheet-like absorbent body is folded back in the buffer region, thereby the upper absorbent layer. And an intermediate absorption layer or a lower absorption layer and an intermediate absorption layer are preferably formed. By folding the sheet-like absorber in the buffer region, the sheet-like absorber is easily folded. In addition, the sheet-like absorbent body is less likely to be bulky at the crease portion, and the absorbent laminate can be easily formed thinly. More preferably, in the sheet-like absorbent body, the upper absorbent layer and the intermediate absorbent layer or the lower absorbent layer and the intermediate absorbent layer are formed by folding the sheet-like absorbent body in the buffer regions arranged in stripes.

  The upper absorbent layer and the intermediate absorbent layer and / or the intermediate absorbent layer and the lower absorbent layer are preferably joined (fixed) to each other. That is, the lower sheet member constituting the upper absorbent layer and the upper sheet member constituting the intermediate absorbent layer are preferably joined to each other by the joining means, and the lower sheet member constituting the intermediate absorbent layer and It is preferable that the upper sheet members constituting the lower absorbent layer are joined to each other by the joining means. As a joining means, a known joining means such as an adhesive, heat sealing (thermal fusion), ultrasonic bonding or the like may be used. From the viewpoint of ease of manufacturing an absorbent laminate, an adhesive is used as the joining means. It is preferable to do. As the adhesive, it is preferable to use a rubber adhesive or a styrene elastomer as described above.

  It is preferable that the upper absorption layer and the intermediate absorption layer and / or the intermediate absorption layer and the lower absorption layer are partially bonded to each other. By joining the absorbent layers in this manner, urine and the like easily migrate beyond the absorbent layer, and the diffusibility of urine and the like in the absorbent laminate is enhanced.

  It is preferable that the upper absorbent layer and the intermediate absorbent layer and / or the intermediate absorbent layer and the lower absorbent layer are joined to each other by an adhesive applied in a spiral shape or a stripe shape. Thus, when each absorption layer is joined, when the absorption area | region of each absorption layer absorbs water, it will swell and will spread easily to a buffer area | region. When the adhesive is applied in a stripe shape, it is preferable to apply the adhesive in a stripe shape extending in the longitudinal direction, which makes it easier for urine or the like to diffuse in the longitudinal direction between the absorbent layers, causing side leakage of urine or the like. It becomes difficult.

  The structural example of an absorptive laminated body is demonstrated with reference to FIGS. 4-7 represents the cross-sectional view of the absorptive laminated body in the width direction, and each absorptive laminated body shall be extended in the longitudinal direction with the cross-sectional shape shown in drawing. In addition, the absorptive laminated body of this invention is not limited to the embodiment shown in drawing.

  The absorbent laminate 10 shown in FIGS. 4 to 7 includes an upper absorbent layer 11, a lower absorbent layer 31, and an intermediate absorbent layer 21 disposed between the upper absorbent layer 11 and the lower absorbent layer 31. Have. Detailed configurations of the upper absorbent layer 11, the intermediate absorbent layer 21, and the lower absorbent layer 31 are understood based on the configuration examples of the absorbent layers shown in FIGS. In each of the absorbent laminates 10 shown in FIGS. 4 to 7, the upper absorbent layer 11 and the lower absorbent layer 31 are provided in an area where the absorbent region is wider than the intermediate absorbent layer 21. Therefore, urine and the like are easily diffused in the buffer region 29 of the intermediate absorption layer 21, and urine and the like are easily absorbed by the absorbent laminate 10. Further, the buffer region 29 of the intermediate absorption layer 21 functions as a space that expands when the respective absorption regions 18, 28, 38 of the upper absorption layer 11, the intermediate absorption layer 21, and the lower absorption layer 31 absorb water and swell. It becomes easy and urine etc. come to be absorbed suitably in the absorption field of each absorption layer.

  In the absorbent laminate 10 illustrated in FIG. 4, the upper absorbent layer 11, the intermediate absorbent layer 21, and the lower absorbent layer 31 are configured independently of each other, and the upper absorbent layer 11, the intermediate absorbent layer 21, and the lower absorbent layer 31 are configured. The buffer regions 19, 29, and 39 are arranged in stripes extending in the longitudinal direction. The absorbent laminate 10 has a buffer region 29 in the middle 15% of the intermediate absorbent layer 21 in the width direction x. As a result, the diffusibility of urine and the like inside the absorbent laminate 10 is enhanced. In addition, side leakage from the intermediate absorption layer 21 is easily prevented. Furthermore, since the buffer region 39 of the lower absorption layer 31 is arranged in a stripe shape extending in the longitudinal direction, the diffusibility of urine or the like in the lower absorption layer 31 is also enhanced.

  In the absorbent laminate 10, the buffer region 29 of the intermediate absorbent layer 21 is provided so as to overlap the absorbent region 18 of the upper absorbent layer 11 and the absorbent region 38 of the lower absorbent layer 31. Therefore, when the absorption regions 18, 28, and 38 of the upper absorption layer 11, the intermediate absorption layer 21, and the lower absorption layer 31 absorb water and swell, they easily spread to the buffer region 29 of the intermediate absorption layer 21. Further, since the buffer region 29 of the intermediate absorbent layer 21 is provided so as to overlap the buffer region 19 of the upper absorbent layer 11, urine and the like move from the upper absorbent layer 11 through the intermediate absorbent layer 21 to the lower absorbent layer 31. It becomes easy to do. Further, in the absorbent laminate 10 shown in FIG. 4, the buffer region 29 of the intermediate absorbent layer 21 is configured by the absence of a water absorbent resin between the upper sheet member and the lower sheet member. Moreover, the diffusibility of urine or the like in the planar direction in the intermediate absorption layer 21 is also enhanced.

  The absorbent laminate 10 shown in FIG. 5 is different from the absorbent laminate shown in FIG. 4 in that the absorption region 38 is provided on almost the entire surface of the lower absorbent layer 31. Therefore, in the absorbent laminate 10 shown in FIG. 5, the absorption capacity of urine and the like can be improved, and the rigidity of the lower absorbent layer 31 can be increased, and the absorbent laminate 10 is less likely to bend or distort. Become.

  The absorbent laminate 10 shown in FIG. 6 has the absorption layer shown in FIG. 5 in that the intermediate absorbent layer 21 is formed by folding both ends of the upper absorbent layer 11 in the width direction x downward. It is different from the conductive laminate. That is, in the absorbent laminate 10 shown in FIG. 6, one sheet-like absorbent body 41 having a water-absorbing resin between sheet members and having no pulp fibers is formed in the buffer region 49 and both end portions 41 </ b> E in the width direction x are formed. By being folded, the intermediate absorption layer 21 is formed from both end portions 41E that are folded, and the upper absorption layer 11 is formed from a central portion 41C between the both end portions 41E. In the absorbent laminate 10 illustrated in FIG. 6, the intermediate absorption layer 21 is formed by being divided in the width direction x, and the buffer region 29 of the intermediate absorption layer 21 is formed between the divided intermediate absorption layers 21. It becomes. If the absorbent laminate 10 is configured in this way, urine or the like that has passed through the upper absorbent layer 11 is suitably guided to the buffer region 29 of the intermediate absorbent layer 21, and urine or the like is contained inside the absorbent laminate 10. It becomes easy to diffuse.

  The absorbent laminate 10 shown in FIG. 7 has the absorption layer shown in FIG. 5 in that the intermediate absorption layer 21 is formed by folding both ends in the width direction x of the lower absorption layer 31 upward. It is different from the conductive laminate. That is, in the absorbent laminate 10 shown in FIG. 7, one sheet-like absorbent body 41 having a water-absorbing resin between sheet members and having no pulp fibers is formed in the buffer region 49, and both end portions 41 </ b> E in the width direction x are formed. The intermediate absorption layer 21 is folded and formed from both end portions 41E, and the lower absorption layer 31 is formed from a central portion 41C between both end portions 41E. In the absorbent laminate 10 shown in FIG. 7, even if a large amount of urine or the like moves into the buffer region 29 of the intermediate absorption layer 21 at a time and the urine or the like spreads widely in the lower absorption layer 31, Leakage is less likely to occur.

  Next, the absorbent article of the present invention will be described. The absorbent article of the present invention is characterized in that the absorbent laminate of the present invention is provided. The absorbent article preferably has a top sheet, a back sheet, and an absorbent laminate provided therebetween. Examples of the absorbent article include urine pads (including incontinence pads), disposable diapers, sanitary napkins and the like. Since the absorbent article of the present invention is provided with the absorbent laminate of the present invention, urine excreted from the wearer can be suitably absorbed by the absorbent laminate, and a high absorption capacity can be realized. .

  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.

  The absorbent article is preferably provided with a pair of rising flaps on both sides in the width direction. By providing the rising flap, side leakage of urine or the like 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. Each 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.

  The absorbent article of the present invention will be described with reference to FIGS. 8 and 9 by taking a urine pad as an example. In addition, the absorbent article of this invention is not limited to the embodiment shown by drawing. 8 and 9, the absorbent article provided with the absorbent laminate shown in FIG. 5 is shown. FIG. 8 shows a plan view of a urine pad as an absorbent article as seen from the top sheet side. FIG. 9 is a cross-sectional view taken along the line AA of the absorbent article in FIG.

  The absorbent article 51 includes a top sheet 52, a back sheet 53, and the absorbent laminate 10 provided therebetween. The top sheet 52 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 52 is accommodated in the absorbent laminate 10. The back sheet 53 prevents body fluid from leaking to the outside.

  The absorbent laminate 10 includes an upper absorbent layer 11, a lower absorbent layer 31, and an intermediate absorbent layer 21 disposed therebetween. The detailed description of the absorbent laminate is as described above. The body fluid that has migrated to the absorbent laminate 10 is first absorbed by the upper absorbent layer 11, and urine or the like that has passed through the upper absorbent layer 11 migrates to the intermediate absorbent layer 21 and further to the lower absorbent layer 31, and is fixed to each absorbent layer. Is done.

  An upper mount 54 is preferably provided between the top sheet 52 and the absorbent laminate 10 (upper absorbent layer 11). Further, it is preferable that a lower mount 55 is provided between the back sheet 53 and the absorbent laminate 10 (lower absorbent layer 31). The upper mount 54 and the lower mount 55 are provided to improve the diffusibility of body fluids such as urine and to make the absorbent article 51 difficult to lose its shape. The upper mount 54 is preferably liquid permeable, and the lower mount 55 may be liquid permeable or liquid impermeable. As the upper mount 54 and the lower mount 55, tissue paper, crepe paper, or the like can be used.

  The absorbent article 51 is preferably provided with side sheets 56 extending in the longitudinal direction y on both sides of the top sheet 52 in the width direction x. The side sheet 56 is joined to the top sheet 52 by a joining portion 57. 8 and 9, the side seats 56 are each provided with three standing elastic members 58 inward in the width direction x. When the absorbent article 51 is used, the inner side of the side sheet 56 rises toward the wearer's skin due to the contraction force of the standing elastic member 58, thereby preventing lateral leakage of excrement such as urine.

1: Absorbing layer 2: First sheet member (upper sheet member)
3: Second sheet member (lower sheet member)
4: Adhesive layer 5: Water-absorbing resin 6: Sealing part 7: Non-sealing part 8, 18, 28, 38: Absorbing area 9, 19, 29, 39, 49: Buffer area 10: Absorbent laminate 11 : Upper absorbent layer 21: Intermediate absorbent layer 31: Lower absorbent layer 41: Sheet-like absorbent body 51: Absorbent article (urine pad)
52: Top sheet 53: Back sheet

Claims (10)

An absorbent laminate provided in an absorbent article,
The absorbent laminate has a longitudinal direction and a width direction, and has an upper absorbent layer, a lower absorbent layer, and an intermediate absorbent layer disposed between the upper absorbent layer and the lower absorbent layer. And
The upper absorbent layer, the intermediate absorbent layer, and the lower absorbent layer are each configured to have a water absorbent resin between the upper sheet member and the lower sheet member and have no pulp fiber, and the sheet members are separated from each other. Having a sealing part joined to each other and a non-sealing part where the sheet members are not joined together,
The upper absorbent layer, the intermediate absorbent layer, and the lower absorbent layer have an absorbent region in which a water absorbent resin is disposed in the non-sealing portion, and a buffer region as a region other than the absorbent region, The absorption layer and the lower absorption layer are provided in an area where the absorption region is wider than the intermediate absorption layer ,
The absorbent laminate, wherein the buffer region of the intermediate absorbent layer is provided so as to overlap the absorbent region of the upper absorbent layer and the absorbent region of the lower absorbent layer . The buffer area of the intermediate absorbent layer is the absorbent laminate according to claim 1 is provided to overlap across both absorption region and the buffer region of the upper absorbent layer. The absorptive laminate according to claim 1 or 2 , wherein the intermediate absorbent layer is provided with a buffer region in at least a part of a region of the center 50% in the longitudinal direction and the center 50% in the width direction. The said intermediate | middle absorption layer is an absorptive laminated body of Claim 3 with which the area | region of the center 20% of a longitudinal direction and the center 15% of the width direction are comprised only from the buffer area | region. The absorptive laminate according to any one of claims 1 to 4 , wherein the upper absorbent layer is provided with a buffer region in at least a part of a region of the center 50% in the longitudinal direction and the center 50% in the width direction. body. The said upper absorption layer is an absorptive laminated body as described in any one of Claims 1-5 by which the buffer area | region is arrange | positioned at the stripe form extended in a longitudinal direction. The said intermediate | middle absorption layer is an absorptive laminated body as described in any one of Claims 1-6 arrange | positioned at the stripe form where a buffer region is extended in a longitudinal direction .   The intermediate absorption layer includes a right intermediate absorption layer and a left intermediate absorption layer that are formed by being divided in the width direction, and a buffer region is formed between the right intermediate absorption layer and the left intermediate absorption layer. Item 8. The absorbent laminate according to any one of Items 1 to 7. The upper absorbent layer and the intermediate absorbent layer are formed by folding one end of the sheet in the width direction in the buffer region, with one sheet-like absorbent body having a water-absorbent resin between the sheet members and no pulp fibers,
The absorptive laminate according to any one of claims 1 to 8, wherein the intermediate absorbent layer is formed from the both end portions that are folded back, and the upper absorbent layer is formed from a central portion between the both end portions. .   An absorptive article provided with the absorptive layered product according to any one of claims 1 to 9.