JP6574817B2 - Absorbent articles - Google Patents

Description

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

  Conventionally, in order to improve the diffusibility of urine etc. in an absorbent article, an absorbent article having an opening formed in an absorbent core is known. For example, Patent Document 1 has a top sheet, a back sheet, and an absorbent laminate provided between them, and the absorbent laminate has an upper absorbent layer and a lower absorbent layer as an absorbent core, An absorbent article in which an opening extending in the front-rear direction (corresponding to the front-rear direction of the wearer when the absorbent article is worn) is formed in the absorbent layer is disclosed.

JP 2007-202575 A

  In the absorbent article disclosed in Patent Document 1, the diffusivity in the front-rear direction of urine and the like is enhanced by an opening formed in the upper absorbent layer, and the urine diffused in the opening is absorbed by the upper absorbent layer and the lower absorbent layer. Absorbed in. However, if a large amount of urine etc. is excreted from the wearer at a time, for example, if a large amount of urine etc. moves to the front end or rear end of the opening at once, the urine etc. may overflow from the opening and leak sideways. .

  This invention is made | formed in view of the said situation, The objective is to provide the absorbent article which is excellent in the diffusibility of urine etc. and is hard to carry out a side leak.

  The absorbent article of the present invention that has solved the above problems is an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent laminate provided therebetween. The absorbent laminate has a front-rear direction and a width direction, and has an upper absorbent layer and a lower absorbent layer from the top sheet side; the upper absorbent layer has an upper opening extending in the front-rear direction. The lower absorbent layer has a lower opening that overlaps with the upper opening and extends in the front-rear direction; the lower opening is forward of the front end of the upper opening and / or rearward of the rear end of the upper opening. It has the characteristic in the place extended.

  In the absorbent article of the present invention, the upper opening formed in the upper absorbent layer and the lower opening formed in the lower absorbent layer are overlapped, so that urine or the like is formed at the portion where the upper opening and the lower opening overlap. The diffusivity in the front-rear direction is improved. Then, urine or the like diffused in the front-rear direction at the portion where the upper opening and the lower opening overlap is accommodated in a pocket formed by the lower opening extending forward and / or rearward from the front end of the upper opening. The urine or the like contained in the pocket is absorbed by the upper absorption layer and the lower absorption layer. As a result, urine or the like excreted from the wearer is easily absorbed by the absorbent laminate without overflowing at the portion where the upper opening and the lower opening overlap, and side leakage such as urine is less likely to occur. Further, in the absorbent article of the present invention, the absorbent laminate is folded in the width direction at the portion where the upper opening and the lower opening overlap, and it becomes easy to form a depression between the wearer's crotch. Is preferably easily received. Also from this point, the absorbent article of the present invention hardly causes side leakage.

The lower opening preferably overlaps with the upper opening and is narrower than the upper opening. If the upper opening and the lower opening are formed in this way, it becomes easier to receive urine excreted from the wearer at a portion where the upper opening and the lower opening overlap, and urine received at the portion. Is quickly absorbed by the lower absorbent layer, making it difficult for urine and the like to overflow. Moreover, by forming the upper opening wider than the lower opening, the absorbent laminate can be easily folded in the width direction so as to form a recess between the wearer's crotch.

  The length in the front-rear direction of the portion where the upper opening and the lower opening overlap is preferably 15% or more and 50% or less of the length in the front-rear direction of the absorbent laminate. If the portion where the upper opening and the lower opening overlap is formed with such a length, the diffusibility of urine and the like in the absorbent laminate is enhanced, and urine is efficiently absorbed by the absorbent laminate. Become so. Moreover, it becomes easy to ensure sufficiently the absorption performance (absorption capacity and absorption rate) of the absorbent laminate.

  The lower opening preferably extends 10 mm or more forward from the front end of the upper opening and extends 10 mm or more rearward from the rear end of the upper opening. If the lower opening is thus formed, the length in the front-rear direction of the portion where the upper opening and the lower opening overlap is sufficiently secured, and the diffusibility of urine and the like in the absorbent laminate is enhanced. In addition, urine and the like are easily accommodated in a pocket formed by the lower opening extending forward from the front end of the upper opening and rearward from the rear end, and the urine accommodated in the pocket becomes the upper absorbent layer. And the lower absorbent layer are easily absorbed quickly.

  Each of the upper absorbent layer and the lower absorbent layer is preferably composed of a molded body containing hydrophilic fibers and a water absorbent resin, and the molded body of the upper absorbent layer is preferably in direct contact with the molded body of the lower absorbent layer. . If the upper absorption layer and the lower absorption layer are configured in this way, the upper opening and the lower opening are formed so as to penetrate therethrough, and the urine or the like is preferably not overflowed at the portion where the upper opening and the lower opening overlap. It becomes easy to spread.

  Each of the upper absorbent layer and the lower absorbent layer is composed of a molded article containing hydrophilic fibers and a water absorbent resin, and the molded article of the upper absorbent layer has a higher water absorbent resin content than the molded article of the lower absorbent layer. It is preferable. Thus, if the upper side absorption layer and the lower side absorption layer are comprised, it will become difficult for the urine etc. which were absorbed by the absorptive laminated body to return to a wearer's skin, and the wearing feeling of an absorbent article will improve.

  It is preferable that the upper absorbent layer is formed longer in the front-rear direction and the width direction than the lower absorbent layer. If the upper absorbent layer and the lower absorbent layer are configured in this way, the lower absorbent layer efficiently contributes to absorption of urine and the like, and the wearer has a step between the upper absorbent layer and the lower absorbent layer. This makes it difficult to remember the uncomfortable feeling caused by being able to wear and improves the feeling of wearing.

  The upper opening may have a front side portion, a rear side portion, and an intermediate portion therebetween in the front-rear direction, and the front side portion and the rear side portion may be formed wider than the intermediate portion. If the upper opening is formed in this way, even if the absorbent laminate is curled when the absorbent article is worn, the curl of the absorbent laminate is relieved by the upper opening, and the absorbent laminate The fit to the skin of the wearer of the body can be enhanced.

  The lower opening may be formed such that the front end and / or the rear end that does not overlap the upper opening is wider than the portion overlapping the upper opening. If the lower opening is formed in this way, urine and the like can be suitably stored in the pockets formed at the front end portion and the rear end portion of the lower opening, and the urine stored in the pocket further The upper absorbent layer and the lower absorbent layer are easily absorbed quickly. Therefore, urine and the like are more easily absorbed by the absorbent laminate.

The upper absorbent layer may have a front slit extending obliquely forward of the upper opening and / or a rear slit extending obliquely rearward of the upper opening on both sides in the width direction of the upper opening. If the front side slit and / or the rear side slit are formed in the upper absorbent layer, the absorbent laminate can be formed to be depressed in both the width direction and the front-rear direction. Therefore, if an absorbent article provided with such an absorbent laminate is worn, excretion is easily received, and side leakage is less likely to occur.

  The backsheet preferably has a different color from the absorbent laminate. If the back sheet has a color different from that of the absorbent laminate, it is easy to recognize the position of the portion where the upper opening and the lower opening overlap when the absorbent article is viewed from the top sheet side. Therefore, by installing the absorbent article while checking the position of the portion where the upper opening and the lower opening overlap, it is easy to install the absorbent laminate at a suitable position between the wearer's crotch.

  In the absorbent article of the present invention, an upper opening formed in the upper absorbent layer and a lower opening formed in the lower absorbent layer are provided so as to overlap each other, and the lower opening is forward of the front end of the upper opening and / or Since it is formed so as to extend rearward from the rear end of the upper opening, the diffusibility in the absorbent laminate such as urine is enhanced through the upper opening and the lower opening, and urine etc. is promptly absorbed in the absorbent laminate. Will be absorbed.

The top view which looked at the absorptive layered product from the top sheet side is expressed. The modification of an absorptive laminated body is represented. The modification of an absorptive laminated body is represented. The modification of an absorptive laminated body is represented. The top view which looked at the absorbent article (urine pad) from the top sheet side as one embodiment of the absorbent article of this invention is represented. The AA sectional view of the absorptive article shown in Drawing 5 is expressed.

  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. When the absorbent article is, for example, 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.

  A top sheet is a sheet | seat located in the wearer side in the case of wear of an absorbent article, and the material will not be specifically limited if it is liquid-permeable. The back sheet is a sheet located on the side opposite to the wearer when the absorbent article is worn, that is, the outside, and the material is not particularly limited as long as it is liquid-impermeable. In the present invention, liquid impermeability includes the meaning of water repellency.

Examples of the top sheet include nonwoven fabrics formed from hydrophilic fibers such as cellulose, rayon, and cotton; and hydrophobic properties such as polyolefin (for example, polypropylene and polyethylene), polyester (for example, PET), and polyamide (for example, nylon). A non-woven fabric formed from fibers, in which the surface of hydrophobic fibers is hydrophilized with a surfactant, can be used. As the top sheet, a woven fabric, a knitted fabric, or a plastic film in which holes are formed may be used.

  As the back sheet, a non-woven fabric formed from hydrophobic fibers such as polyolefin (for example, polypropylene, polyethylene), polyester (for example, PET), polyamide (for example, nylon), a plastic film, or the like can be used. Moreover, you may use the laminated body of a nonwoven fabric and a plastic film.

  When a nonwoven fabric is used as the top sheet or the back sheet, the nonwoven fabric is preferably manufactured 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.

  The absorbent laminate is provided between the top sheet and the back sheet and absorbs excrement such as urine. The absorbent laminate has an upper absorbent layer and a lower absorbent layer from the topsheet side. Preferably, the upper absorbent layer is provided adjacent to the lower absorbent layer. Moreover, it is preferable that an absorptive laminated body has only an upper side absorption layer and a lower side absorption layer as an absorber.

  The absorbent laminate has a front-rear direction and a width direction. The front-rear direction means a direction extending in the front-rear direction of the wearer's crotch when the wearer wears the absorbent article. In the front-rear direction, a position applied to the wearer's ventral side is referred to as a front side, and a position applied to the wearer's back side is referred to as a rear side. The width direction means a direction that is on the same plane as the absorbent laminate and is orthogonal to the front-rear direction. Moreover, in this invention, the upper side means the wearer side at the time of wearing an absorbent article, and a lower side means the opposite side, ie, an outer side, from the wearer at the time of wearing an absorbent article. A direction extending from the upper side to the lower side is referred to as a vertical direction.

  The upper absorbent layer and the lower absorbent layer constituting the absorbent laminate are not particularly limited as long as they contain an absorbent material that can absorb excrement such as urine. As the upper absorbent layer and the lower absorbent layer, for example, a molded body obtained by shaping the absorbent material into a predetermined shape is used, or the absorbent material is a paper sheet (for example, tissue paper or thin paper), a liquid-permeable nonwoven fabric sheet, or the like. The one covered with the sheet member can be used. Examples of the absorbent material include hydrophilic fibers such as pulverized pulp fiber and cellulose fiber, and water-absorbing resins such as polyacrylic acid, polyaspartic acid, cellulose, and starch / acrylonitrile. The water-absorbing material may include polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as PET, and heat-fusible fibers such as polyamide fibers. These heat-fusible fibers may be subjected to a hydrophilic treatment with a surfactant or the like in order to increase the affinity with body fluid such as urine.

  The absorbent material preferably contains hydrophilic fibers and more preferably contains pulp fibers from the viewpoint of increasing the absorption rate of urine and the like and improving the shape retention of the absorbent laminate. Moreover, it is preferable that an absorptive material contains a water absorbing resin from the point which raises absorption capacity. More preferably, the upper side absorption layer and the lower side absorption layer which comprise an absorptive laminated body contain a hydrophilic fiber and a water absorbing resin as an absorptive material, respectively. As will be described later, an opening is formed in each of the upper absorbent layer and the lower absorbent layer. Therefore, if the upper absorbent layer and the lower absorbent layer contain hydrophilic fibers and a water absorbent resin, the upper absorbent layer And the openings of the lower absorbent layer are easily maintained in a predetermined shape, and the absorption performance of the upper absorbent layer and the lower absorbent layer is enhanced.

The basis weight of each of the upper absorbent layer and the lower absorbent layer is preferably 100 g / m ² or more, and 130 g
/ M ² or more is more preferable, 300 g / m ² or less is preferable, and 250 g / m ² or less is more preferable. When the basis weight of the upper absorbent layer and the lower absorbent layer is 100 g / m ² or more, the upper absorbent layer and the lower absorbent layer are likely to have sufficient rigidity. Therefore, it becomes easy to maintain the opening formed in each of the upper absorbent layer and the lower absorbent layer in a predetermined shape. When the basis weight of the upper absorbent layer and the lower absorbent layer is 300 g / m ² or less, the entire absorbent article does not become too thick, and the wearing feeling of the absorbent article is improved. The basis weights of the upper absorbent layer and the lower absorbent layer may be the same or different.

  The shape (planar shape) of the absorbent laminate is not particularly limited. The shape (planar shape) of the upper absorbent layer and the lower absorbent layer 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.

  Openings extending in the front-rear direction are formed in the upper absorbent layer and the lower absorbent layer, respectively, and an upper opening formed in the upper absorbent layer and a lower opening formed in the lower absorbent layer are provided so as to overlap each other. The lower opening extends forward from the front end of the upper opening and / or rearward from the rear end of the upper opening.

  Here, in order to facilitate understanding of the formation of the upper opening and the lower opening, a configuration example of the absorbent laminate will be described with reference to FIG. FIG. 1: represents the top view which looked at the absorptive laminated body from the top sheet side. In the drawings of the present application, the arrow x represents the width direction, the arrow y represents the front-rear direction, and the direction perpendicular to the plane formed by the arrows x, y represents the up-down direction z. Moreover, in FIG. 1, 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 present invention is not limited to the embodiments shown in the drawings.

  The absorbent laminate 4 has an upper absorbent layer 5 and a lower absorbent layer 7 from the top sheet side, the upper absorbent layer 5 has an upper opening 6 extending in the front-rear direction y, and the lower absorbent layer 7 is The lower opening 8 overlaps with the upper opening 6 and extends in the front-rear direction y. The lower opening 8 extends forward from the front end of the upper opening 6 and / or rearward from the rear end of the upper opening 6. As a result, in the lower opening 8, a portion 8 </ b> F ahead of the front end of the upper opening 6 (hereinafter sometimes referred to as “front end portion”) and / or a portion behind the rear end of the upper opening 6. A pocket 9 formed by covering the lower opening 8 with the upper absorbent layer 5 is provided in 8B (hereinafter sometimes referred to as “rear end portion”). FIG. 1 shows a mode in which the lower opening 8 extends forward from the front end of the upper opening 6 and rearward from the rear end of the upper opening 6.

  In the absorbent article of the present invention, the upper absorbent layer 5 and the lower absorbent layer 7 are thus provided with the upper opening 6 and the lower opening 8, respectively, so that urine is formed at the portion where the upper opening 6 and the lower opening 8 overlap. Thus, the diffusibility in the front-rear direction y is improved. The urine or the like diffused in the front-rear direction y at the portion where the upper opening 6 and the lower opening 8 overlap is accommodated in the pocket 9 formed at the front end 8F and / or the rear end 8B of the lower opening 8. The urine or the like accommodated in the pocket 9 is absorbed by the upper absorbent layer 5 and the lower absorbent layer 7. As a result, urine or the like excreted from the wearer is quickly absorbed by the absorbent laminate 4. Therefore, in the absorbent article of the present invention, side leakage such as urine is less likely to occur.

  For example, in an absorbent article having a conventional upper absorbent layer and a lower absorbent layer, it is common to provide an upper opening formed in the upper absorbent layer so as to overlap with a lower opening formed in the lower absorbent layer. I did not come. This is because there was a concern that the upper opening and the lower opening were overlapped, so that urine and the like were likely to overflow at the portion where the upper opening and the lower opening overlapped, and the absorption performance of urine and the like was rather lowered. It is done. However, in the absorbent article of the present invention, the pocket 9 is formed at the front end 8F and / or the rear end 8B of the lower opening 8, so that the urine that has moved to the portion where the upper opening 6 and the lower opening 8 overlap each other. Etc. diffuse in the front-rear direction y and are accommodated in the pocket 9, so that urine and the like are quickly absorbed in the pocket 9.

Moreover, in the absorbent article of this invention, it becomes easy to form a hollow in a wearer's crotch by bend | folding the absorbent laminated body 4 to the width direction x in the part which the upper side opening 6 and the lower side opening 8 overlap. Therefore, the absorbent article of the present invention can easily receive excrement from the wearer and is less likely to cause side leakage.

  The shapes of the upper opening 6 and the lower opening 8 are not particularly limited as long as they extend in the front-rear direction y, but are longer in the front-rear direction y than the width direction x in terms of promoting diffusion of urine or the like in the front-rear direction y. Preferably there is. In FIG. 1, the shapes of the upper opening 6 and the lower opening 8 are round rectangles with long corners in the front-rear direction y. The shape of the opening may be, for example, a rectangle, an ellipse, a polygon, an hourglass shape, a gourd shape, or the like.

  When the absorbent article is worn, the upper opening 6 and the lower opening 8 are preferably provided in the upper absorbent layer 5 and the lower absorbent layer 7 so as to face the vicinity of the urination part of the wearer. If the upper opening 6 and the lower opening 8 are thus provided, the urine excreted from the wearer quickly moves to a portion where the upper opening 6 and the lower opening 8 overlap, and diffuses in the front-rear direction y at the portion. It becomes easy to do.

  In FIG. 1, one upper opening 6 and one lower opening 8 are provided, but the number of the upper openings 6 and the lower openings 8 is not limited to this and may be two or more. In order to make the urine excreted from the wearer easy to receive urine or the like in the portion where the upper opening 6 and the lower opening 8 overlap, and to increase the diffusibility of the urine or the like in the portion in the front-rear direction y, The opening 6 and the lower opening 8 are preferably formed so as to extend in the front-rear direction y on the center line C in the width direction x of the absorbent laminate 4. In this case, the upper opening 6 and the lower opening 8 formed so as to extend in the front-rear direction y are preferably provided one by one as shown in FIG. Thus, by providing the upper side opening 6 and the lower side opening 8, the absorption capacity | capacitance of the absorptive laminated body 4 is ensured, and it becomes easy to hold the absorptive laminated body 4 in a predetermined shape.

  As shown in FIG. 1, the lower opening 8 is preferably formed to extend forward from the front end of the upper opening 6 and rearward from the rear end of the upper opening 6. If the lower opening 8 is formed in this way, pockets 9 that can contain urine and the like are formed in both the front end 8F and the rear end 8B of the lower opening 8, and the urine or the like is absorbed in the laminate. The body 4 is easily absorbed quickly.

  The depth (the length in the front-rear direction y) of the pocket 9 formed at the front end 8F and / or the rear end 8B of the lower opening 8 is preferably 10 mm or more, more preferably 15 mm or more, and 20 mm or more. Further preferred. That is, the lower opening 8 extends 10 mm or more (more preferably 15 mm or more, more preferably 20 mm or more) forward of the front end of the upper opening 6, and is rearward of the rear end of the upper opening 6. It is preferable to extend 10 mm or more (more preferably 15 mm or more, and further preferably 20 mm or more). If the pocket 9 is formed in this way, urine or the like is easily accommodated in the pocket 9, and as a result, the urine or the like accommodated in the pocket 9 is separated by the upper absorbent layer 5 and the lower absorbent layer 7. It becomes easy to be absorbed quickly. The upper limit of the depth of the pocket 9 is not particularly limited, but even if the depth of the pocket 9 is too deep, urine or the like hardly reaches the back of the pocket 9 and the absorption capacity of the lower absorbent layer 7 is reduced. Therefore, the depth of the pocket 9 is preferably 150 mm or less, and more preferably 130 mm or less. That is, the lower opening 8 extends forward by 150 mm or less (more preferably 130 mm or less) from the front end of the upper opening 6, and is 150 mm or less (more preferably 130 mm) rearward from the rear end of the upper opening 6. It is preferable that it extends only below.

The length in the front-rear direction y of the portion where the upper opening 6 and the lower opening 8 overlap (hereinafter sometimes referred to as “opening overlapping portion”) is 15% or more of the length in the front-rear direction y of the absorbent laminate 4. It is preferably 20% or more, more preferably 50% or less, and even more preferably 45% or less. If the length of the opening overlap portion in the front-rear direction y is 15% or more of the length of the absorbent laminate 4 in the front-rear direction y, the length of the opening overlap portion in the front-rear direction y is sufficiently secured. The diffusibility of urine and the like is enhanced, and the urine and the like are efficiently absorbed by the absorbent laminate 4. Moreover, it becomes easy to form a hollow in a wearer's crotch by folding an absorbent article in the width direction x. If the length in the front-rear direction y of the opening overlap portion is 50% or less of the length in the front-rear direction y of the absorbent laminate 4, the portion where the absorbent material is not disposed in the absorbent laminate 4 does not increase too much, Absorption performance (absorption capacity and absorption rate) of the absorbent laminate 4 is easily secured. In FIG. 1, the lower opening 8 is formed so as to extend forward from the front end of the upper opening 6 and rearward from the rear end of the upper opening 6. It is equal to the length of the upper opening 6 in the front-rear direction y.

  The lower opening 8 is preferably formed to be narrower than the upper opening 6 at a portion overlapping the upper opening 6. If the upper opening 6 and the lower opening 8 are formed in this manner, it becomes easier to receive urine excreted from the wearer at the opening overlapping portion, and the urine received at the opening overlapping portion is absorbed by the lower side. It is absorbed quickly by the layer 7 and urine or the like is less likely to overflow in the portion. Further, since the upper opening 6 is formed wider than the lower opening 8, the absorbent laminate 4 is formed in the width direction x so as to form a depression (not a bulge) between the crotch of the wearer at the overlapping portion of the opening. It becomes easy to bend. In order to ensure such an effect, the width of the upper opening 6 is preferably 1.2 times or more than the width of the lower opening 8 in the opening overlapping portion, and more than 1.5 times. More preferably, it is 5.0 times or less, more preferably 4.0 times or less. The widths of the upper opening 6 and the lower opening 8 mean the length in the width direction x.

  The width of the lower opening 8 is preferably 5 mm or more, more preferably 7 mm or more, more preferably 25 mm or less, and even more preferably 20 mm or less at the opening overlapping portion. If the width of the lower opening 8 is 5 mm or more at the opening overlapping portion, the diffusibility of urine or the like in the front-rear direction y is enhanced at the opening overlapping portion, and the absorbent laminate 4 is bent in the width direction x at the opening overlapping portion. It becomes easy. If the width of the lower opening 8 is 25 mm or less at the opening overlapping portion, urine or the like is easily absorbed by the lower absorption layer 7 while diffusing in the front-rear direction y at the opening overlapping portion. Therefore, even if a large amount of urine or the like is excreted at a time, the urine or the like is unlikely to overflow at the opening overlapping portion.

  The upper absorbent layer 5 and the lower absorbent layer 7 are formed from molded articles containing hydrophilic fibers and a water absorbent resin, respectively, so that urine or the like is suitably diffused in the opening overlap portion without overflowing. It is preferable that the molded body of the upper absorbent layer 5 is in direct contact with the molded body of the lower absorbent layer 7. That is, it is preferable that no other member such as a tissue is provided between the upper absorbent layer 5 and the lower absorbent layer 7, and the upper opening 6 of the upper absorbent layer 5 and the lower opening 8 of the lower absorbent layer 7 Is preferably penetrating.

  Furthermore, it is preferable that the molded body of the upper absorbent layer 5 and the molded body of the lower absorbent layer 7 are not joined by a joining means such as an adhesive. As a result, urine or the like easily moves between the upper absorbent layer 5 and the lower absorbent layer 7, and urine or the like is preferably easily absorbed by both the upper absorbent layer 5 and the lower absorbent layer 7.

The upper absorbent layer 5 and the lower absorbent layer 7 are also composed of molded articles containing hydrophilic fibers and a water absorbent resin, respectively, and the molded article of the upper absorbent layer 5 is more water absorbent than the molded article of the lower absorbent layer 7. It is preferable that the resin content is high. In general, an absorber containing a hydrophilic resin and a water-absorbing resin has a higher absorption capacity as the water-absorbing resin content increases. However, when the water-absorbing resin absorbs water and swells, so-called gel blocking occurs, and urine In some cases, the permeability of the absorber, etc., decreases. However, in the absorbent laminate 4 used in the absorbent article of the present invention, there is a portion where the upper opening 6 and the lower opening 8 overlap, so even if the water absorbent resin content of the upper absorbent layer 5 is increased, the upper opening Urine or the like can be transferred to the lower absorbent layer 7 through a portion where the upper opening 6 and the lower opening 8 overlap, and the urine or the like is preferably easily absorbed by both the upper absorbent layer 5 and the lower absorbent layer 7. Therefore, by increasing the water absorbent resin content of the molded article of the upper absorbent layer 5, the upper absorbent layer 5 secures the absorption performance of the lower absorbent layer 7 and the so-called wetback (reverse phenomenon of absorbed urine, etc.). ). Therefore, urine or the like absorbed by the absorbent laminate 4 is less likely to return to the wearer's skin, and the wearing feeling of the absorbent article is improved.

  As shown in FIG. 1, the upper absorbent layer 5 is preferably formed longer than the lower absorbent layer 7 in the front-rear direction y and the width direction x. In the absorbent article of the present invention, the lower absorbent layer 7 can absorb urine and the like from the portion where the upper opening 6 and the lower opening 8 overlap, but the absorbent material of the lower absorbent layer 7 around the periphery of the portion. In other words, by making the length of the lower absorption layer 7 in the front-rear direction y and the width direction x shorter than that of the upper absorption layer 5, the lower absorption layer 7 efficiently absorbs urine and the like. Will contribute. Further, since the upper absorbent layer 5 is formed longer in the front-rear direction y and the width direction x than the lower absorbent layer 7, the wearer feels uncomfortable due to a step between the upper absorbent layer 5 and the lower absorbent layer 7. It becomes difficult to remember and the feeling of wear improves.

  Next, a modified example of the absorbent laminate 4 will be described with reference to FIGS. The modification of the absorptive layered product 4 was shown in Drawing 2-Drawing 4, respectively. In addition, below, description which abbreviate | omits the description of the absorbent laminated body 4 shown in FIG. 1 is abbreviate | omitted.

  In the embodiment shown in FIG. 2, the upper opening 6 is formed so that both ends in the front-rear direction y are wide. That is, the upper opening 6 has a front side portion 6F, a rear side portion 6B, and an intermediate portion 6M between them in the front-rear direction y, and the front side portion 6F and the rear side portion 6B are formed wider than the intermediate portion 6M. ing. If the upper opening 6 is formed in this way, even if the absorbent laminate 4 is curled when the absorbent article is worn, the curling of the absorbent laminate 4 is relieved by the upper opening 6. Moreover, the fit property to the wearer's skin of the absorptive laminated body 4 can be improved. For example, the absorbent laminate 4 shown in FIG. 2 is always easy to fit into the skin of the wearer even when the wearer is walking. The ratio of the length in the front-rear direction y of the front side part 6F, the rear side part 6B, and the intermediate part 6M is not particularly limited. For example, as shown in FIG. 2, the upper opening 6 is divided into three equal parts in the front-rear direction y. The front side portion 6F, the rear side portion 6B, and the intermediate portion 6M may be defined.

  In the embodiment shown in FIG. 3, the lower opening 8 is formed so that both ends in the front-rear direction y are wide. That is, the lower opening 8 is formed so that the front end 8F and the rear end 8B that do not overlap with the upper opening 6 are wider than the portion that overlaps with the upper opening 6. If the lower opening 8 is formed in this way, urine or the like can be suitably stored in the pockets 9 formed at the front end 8F and the rear end 8B of the lower opening 8 and stored in the pocket 9. The urine and the like thus made are more readily absorbed by the upper absorbent layer 5 and the lower absorbent layer 7. Therefore, urine and the like are more easily absorbed by the absorbent laminate 4. Although not shown in the drawing, the lower opening 8 may be formed wider than a portion where only one of the front end 8F and the rear end 8B overlaps the upper opening 6.

  In the embodiment shown in FIG. 4, the upper absorbent layer 5 has a front slit 10 extending obliquely forward of the upper opening 6 and a rear slit extending obliquely rearward of the upper opening 6 on both sides in the width direction x of the upper opening 6. 11. Thus, if the front side slit 10 and the rear side slit 11 are formed in the upper side absorption layer 5, it can be formed so that the absorptive laminated body 4 can be depressed in both the width direction x and the front-back direction y. become. Therefore, if an absorbent article provided with such an absorbent laminate 4 is worn, excreta can be suitably received, and side leakage is less likely to occur. Although not shown in the drawing, only one of the front slit 10 and the rear slit 11 may be formed in the upper absorbent layer 5. Further, the front slit 10 and / or the rear slit 11 may be connected to the upper opening 6.

  Further, the absorbent laminate 4 may be a combination of the embodiments shown in FIGS.

  Next, the structural example of the absorbent article of this invention is demonstrated with reference to FIG. 5 and FIG. The present invention is not limited to the embodiments shown in the drawings. 5 and 6 show an absorbent article provided with the absorbent laminate 4 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 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorbent laminate 4 provided therebetween. The top sheet 2 is disposed so as to face the wearer's skin, and allows excretion such as urine to pass through. The excrement that has passed through the top sheet 2 is accommodated by the absorbent laminate 4. The back sheet 3 prevents excrement from leaking outside.

  The absorbent laminate 4 has a front-rear direction y and a width direction x, and has an upper absorbent layer 5 and a lower absorbent layer 7 from the top sheet 2 side. The upper absorbent layer 5 has an upper opening 6 that extends in the front-rear direction y, and the lower absorbent layer 7 has a lower opening 8 that overlaps the upper opening 6 and extends in the front-rear direction y. The lower opening 8 extends forward from the front end of the upper opening 6 and / or rearward from the rear end of the upper opening 6. Urine or the like accommodated in the absorbent laminate 4 diffuses in the front-rear direction y at the portion where the upper opening 6 and the lower opening 8 overlap, and is formed at the front end 8F and / or the rear end 8B of the lower opening 8. Stored in the pocket 9. Therefore, in the absorbent article 1 of the present invention, the diffusibility of the urine etc. accommodated in the absorbent laminate 4 in the front-rear direction y is enhanced, and the urine etc. is quickly absorbed by the absorbent laminate 4. Become.

  The back sheet 3 preferably has a different color from the absorbent laminate 4. If the back sheet 3 has a color different from that of the absorbent laminate 4, when the absorbent article 1 is viewed from the top sheet 2 side, the back sheet 2 passes through a portion where the upper opening 6 and the lower opening 8 overlap. The color can be visually recognized, and the position of the portion where the upper opening 6 and the lower opening 8 overlap can be easily recognized. Therefore, by installing the absorbent article 1 while checking the position of the portion where the upper opening 6 and the lower opening 8 overlap, it is easy to install the absorbent laminate 4 at a suitable position between the wearer's crotch. . Examples of the color of the backsheet 2 include blue because the absorbent laminate 4 is generally white.

  As shown in FIG. 6, an upper mount 15 is provided between the top sheet 2 and the absorbent laminate 4, and a lower mount 16 is provided between the back sheet 3 and the absorbent laminate 4. Is preferred. In FIG. 5, the upper mount 15 and the lower mount 16 are omitted. By providing the upper mount 15 and the lower mount 16, the absorbent laminate 4 is not easily deformed. When the upper absorbent layer 5 and the lower absorbent layer 7 of the absorbent laminate 4 contain a water absorbent resin, the upper absorbent sheet 15 and the lower mount 16 form a water absorbent resin on the surface of the top sheet 2 or the back sheet 3. Is prevented and the touch of the top sheet 2 and the back sheet 3 is easily maintained. As the upper mount 15 and the lower mount 16, tissue paper, thin paper, crepe paper, or the like can be used.

  The upper mount 15 is preferably joined to the upper absorbent layer 5 by a joining means such as an adhesive. Further, the lower mount 16 is preferably bonded to the lower absorbent layer 7 by a bonding means such as an adhesive. If the upper mount 15 is bonded to the upper absorbent layer 5, the shape retention of the upper absorbent layer 5 is improved, and the shape of the upper opening 6 formed in the upper absorbent layer 5 is easily maintained. Similarly, if the lower mount 16 is bonded to the lower absorbent layer 7, the shape retention of the lower absorbent layer 7 is enhanced, and the shape of the lower opening 8 formed in the lower absorbent layer 7 is preferable. To be easily maintained. In addition, as above-mentioned, it is preferable that the upper side absorption layer 5 and the lower side absorption layer 7 are not mutually joined.

In the absorbent article 1, the front-rear direction y of the absorbent laminate 4 is provided on both sides of the absorbent laminate 4 in the width direction x.
A rising flap 12 may be provided. In FIGS. 5 and 6, the side sheet 13 extending in the front-rear direction y is joined to both sides of the top sheet 2 in the width direction x, and the standing elasticity provided at the inner end of the side sheet 13 in the width direction x. Due to the contraction force of the member 14, the inner end of the side sheet 13 rises toward the wearer's skin, whereby the rising flap 12 is formed. The rising flap 12 prevents side leakage in the width direction x such as urine. The side sheet 13 is composed of a liquid-impermeable plastic film, a liquid-impermeable nonwoven fabric, or the like. Note that the rising flap 12 may have the inner surface of the end portion in the front-rear direction y joined to the top sheet 2, whereby the rising flap 12 can be easily raised.

1: Absorbent article (urine pad)
2: Top sheet 3: Back sheet 4: Absorbent laminate 5: Upper absorbent layer 6: Upper opening 7: Lower absorbent layer 8: Lower opening

Claims (5)

An absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent laminate provided therebetween,
The absorbent laminate has a front-rear direction and a width direction, and has an upper absorbent layer and a lower absorbent layer from the topsheet side,
The upper absorbent layer has an upper opening extending in the front-rear direction,
The lower absorbent layer has a lower opening that overlaps the upper opening and extends in the front-rear direction,
The lower opening extends forward from the front end of the upper opening and / or rearward from the rear end of the upper opening, and has a front end and / or a rear end that does not overlap the upper opening. , Formed wider than the portion overlapping the upper opening,
The upper absorbent layer is formed wider than the lower absorbent layer over the entire front-rear direction,
The lower opening is formed narrower than the upper absorbent layer over the entire front-rear direction, and is formed narrower than the upper opening over the entire front-rear direction ,
Each of the upper absorbent layer and the lower absorbent layer is composed of a molded body containing pulp fibers and a water absorbent resin,
The absorbent article, wherein the molded body of the upper absorbent layer has a higher water-absorbing resin content than the molded body of the lower absorbent layer.   The absorbent article according to claim 1, wherein the upper opening is formed behind the front end of the upper absorbent layer and ahead of the rear end.   The absorbent article according to claim 1 or 2, wherein the lower opening extends forward from a front end of the upper opening and rearward from a rear end of the upper opening. The upper opening includes a front side portion, a rear side portion, and an intermediate portion therebetween in the front-rear direction, and the front side portion and the rear side portion are formed wider than the intermediate portion. The absorbent article as described in any one of 1-3 . The absorbent article according to any one of claims 1 to 4 , wherein the upper absorbent layer is formed longer in the front-rear direction than the lower absorbent layer.

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