JP6542960B2 - Absorbent articles - Google Patents

Description

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

  DESCRIPTION OF RELATED ART Conventionally, in order to improve the spreading | diffusion property of urine etc. in an absorbent article, the absorbent article in which the opening was formed in the 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, and the upper side. An absorbent article is disclosed 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.

JP 2007-202575 A

  The absorbent article disclosed in Patent Document 1 has an opening formed in the upper absorbent layer to enhance the diffusion of urine etc. in the front-rear direction, and the urine diffused in this opening is the upper absorbent layer or the lower absorbent layer Absorbed by However, if a large amount of urine or the like is excreted at one time from the wearer, for example, if a large amount of urine or the like migrates at one time to the front end or back end of the opening, urine or the like may overflow from the opening and leak laterally. .

  The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide an absorbent article which is excellent in diffusion of urine and the like and hardly leaks laterally.

  The absorbent article of the present invention, which has been able to solve 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 an anteroposterior 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 longitudinal direction The lower absorbent layer overlaps the upper opening and has a lower opening extending 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 a feature where it extends to

  In the absorbent article of the present invention, since the upper opening formed in the upper absorbent layer and the lower opening formed in the lower absorbent layer overlap each other, urine etc. is generated in the portion where the upper opening and the lower opening overlap. Diffusivity in the front and back direction of the The urine and the like diffused in the front-rear direction in the portion where the upper opening and the lower opening overlap is accommodated in the pocket formed by the lower opening extending forward from the front end of the upper opening and / or rearward than the rear end. The urine contained in the pocket is absorbed by the upper absorbent layer and the lower absorbent layer. As a result, urine or the like excreted from the wearer is easily absorbed by the absorbent laminate without overflowing in a portion where the upper opening and the lower opening overlap, and lateral leakage of urine or the like hardly occurs. Moreover, in the absorbent article of the present invention, the absorbent laminate is bent in the width direction at the portion where the upper opening and the lower opening overlap, and it becomes easy to form a recess in the crotch of the wearer, so excrement from the wearer Is easily received. Also in this respect, the absorbent article of the present invention is less likely to cause side leakage.

The lower opening is preferably formed narrower than the upper opening at a portion overlapping the upper opening. Thus, if the upper opening and the lower opening are formed, urine and the like excreted from the wearer can be easily received at the portion where the upper opening and the lower opening overlap, and the urine etc received at the portion However, it is absorbed quickly by the lower absorbent layer, making it difficult for urine etc. to overflow. Further, by forming the upper opening wider than the lower opening, the absorbent laminate can be easily bent in the width direction so as to form a recess in the crotch region of the wearer.

  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 each other is formed to have such a length, the diffusion of urine and the like in the absorbent laminate is enhanced, and urine and the like are efficiently absorbed by the absorbent laminate. Become so. In addition, the absorption performance (absorption capacity and absorption speed) of the absorbent laminate can be easily secured sufficiently.

  The lower opening preferably extends 10 mm or more forward of the front end of the upper opening and extends 10 mm or more rearward than the rear end of the upper opening. Thus, if the lower opening is 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 diffusivity of urine or the like in the absorbent laminate is enhanced. Further, urine etc. can be easily accommodated in the pocket formed by the lower opening extending forward and backward from the front end and the rear end of the upper opening, and the urine etc. contained in the pocket is the upper absorbent layer And the lower absorbent layer are readily absorbed.

  It is preferable that the upper absorbent layer and the lower absorbent layer are each formed of a molded article containing hydrophilic fibers and a water absorbing resin, and the molded article of the upper absorbent layer is in direct contact with the molded article of the lower absorbent layer . Thus, if the upper and lower absorbent layers are formed, the upper opening and the lower opening are formed to penetrate, and urine and the like do not overflow at the portion where the upper opening and the lower opening overlap. It becomes easy to spread.

  The upper absorbent layer and the lower absorbent layer are each formed 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. Is preferred. As described above, when the upper and lower absorbent layers are configured, it is difficult for urine absorbed by the absorbent laminate to return to the skin of the wearer, and the wearing feeling of the absorbent article is improved.

  The upper absorbent layer is preferably formed longer in the front-rear direction and the width direction than the lower absorbent layer. As described above, when the upper and lower absorbent layers are configured, the lower absorbent layer efficiently contributes to absorption of urine and the like, and the wearer has a difference between the upper and lower absorbent layers. It makes it difficult to feel discomfort due to being able to

  The upper opening may have the front side, the back side, and an intermediate part therebetween in the front-rear direction, and the front side and the back side may be formed wider than the middle. If the upper opening is formed in this way, even when the absorbent laminate is worn while wearing the absorbent article, the curl of the absorbent laminate is relieved at the upper opening, and the absorbent laminate is formed. It can improve the fit to the skin of the wearer of the body.

  The lower opening may be formed such that the front end and / or the rear end not overlapping the upper opening is wider than the portion overlapping the upper opening. Thus, if the lower opening is formed, urine etc. will be easily accommodated in the pockets formed at the front end and the rear end of the lower opening, and the urine etc. contained in the pocket will be further It becomes easy to be absorbed quickly by the upper absorption layer and the lower absorption layer. Therefore, urine and the like are more easily absorbed by the absorbent laminate.

The upper absorbent layer may have a front slit extending diagonally forward of the upper opening and / or a rear slit extending diagonally rear 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 is formed in the upper absorbent layer, the absorbent laminate can be formed to be recessed in both the width direction and the front-rear direction. Therefore, if the absorbent article provided with such an absorbent laminate is worn, it becomes easy to receive excrement suitably and it becomes difficult to occur a side leak.

  Preferably the backsheet has a different color than the absorbent laminate. If the back sheet has a color different from that of the absorbent laminate, when the absorbent article is viewed from the top sheet side, the position of the portion where the upper opening and the lower opening overlap can be easily recognized. Therefore, by wearing the absorbent article while confirming the position of the overlapping portion of the upper opening and the lower opening, it becomes easy to install the absorbent laminate at a suitable position between the crotch of the wearer.

  In the absorbent article of the present invention, the upper opening formed in the upper absorbent layer is overlapped with the lower opening formed in the lower absorbent layer, and the lower opening is located forward of and / or from the front end of the upper opening. Since it is formed to extend rearward from the rear end of the upper opening, diffusion of the urine or the like in the absorbent laminate is enhanced through the upper opening and the lower opening, and urine or the like is quickly absorbed by the absorbent laminate. Will be absorbed by

The top view which looked at an absorptive layered product from the top sheet side is expressed. 7 illustrates a modified example of an absorbent laminate. 7 illustrates a modified example of an absorbent laminate. 7 illustrates a modified example of an absorbent laminate. As one embodiment of the absorbent article of the present invention, the top view which looked at the absorbent article (the urine pad) from the top sheet side is expressed. The AA cross section of the absorbent article shown in FIG. 5 is represented.

  The absorbent article of the present invention has a top sheet, a back sheet, and an absorbent laminate provided therebetween. Urine pads (including incontinence pads), disposable diapers, sanitary napkins and the like are shown as embodiments of the absorbent article of the present invention.

  The shape of the absorbent article is not particularly limited. When the absorbent article is, for example, a urine pad or a sanitary napkin, as the shape of the absorbent article, a substantially rectangular shape, an hourglass shape, a gourd type, a battledore type, etc. are shown.

  When the absorbent article is a disposable diaper, the disposable diaper may be an open-type disposable diaper provided with a pair of fastening members on the left and right sides and formed into a pants type when worn by the fastening members, the waist opening It may be a pants-type disposable diaper 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 the material is not particularly limited as long as it is liquid permeable. The back sheet is a sheet located on the opposite side to the wearer when the absorbent article is worn, that is, the outer side, 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.

The top sheet may be, for example, a non-woven fabric made of hydrophilic fibers such as cellulose, rayon and cotton; and hydrophobicity 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 a hydrophobic fiber is made hydrophilic with a surfactant, or the like can be used. In addition, as the top sheet, a woven fabric, a knitted fabric, or a plastic film in which a hole is formed may be used.

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

  When a non-woven fabric is used as the top sheet or back sheet, the non-woven fabric is preferably manufactured by a spun bond method, an air through method, a point bond method, a melt blow method, an air laid method or a combination of their production methods. Alternatively, a non-woven fabric produced by the SMS method in which the spun bond method and the melt blow method are combined may be used.

  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 top sheet 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 absorption layer and a lower 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 crotch of the wearer when the absorbent article is worn by the wearer. In the front-rear direction, a position applied to the ventral side of the wearer is referred to as the front side, and a position applied to the dorsal side of the wearer is referred to as the back side. The width direction means a direction which is on the same plane as the absorbent laminate and orthogonal to the front-rear direction. In the present invention, the upper side means the wearer side when wearing the absorbent article, and the lower side means the opposite side to the wearer when wearing the absorbent article, that is, the outer side. The direction extending downward from the upper side is referred to as the 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 capable of absorbing excrement such as urine. As the upper absorbent layer and the lower absorbent layer, for example, a molded article obtained by forming an absorbent material into a predetermined shape may be used, or an absorbent material may be used as a paper sheet (for example, tissue paper or thin paper) or a liquid permeable nonwoven sheet The thing covered with the sheet member of can be used. Examples of the absorbent material include hydrophilic fibers such as pulverized pulp fibers and cellulose fibers, and water-absorbent resins such as polyacrylic acid-based, polyaspartic acid-based, cellulose-based and starch / acrylonitrile-based. In addition, 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 hydrophilization treatment with a surfactant or the like in order to enhance the affinity to body fluid such as urine.

  The absorbent material preferably contains hydrophilic fibers, and more preferably pulp fibers, in order to increase the rate of absorption of urine and the like and to improve the shape retention of the absorbent laminate. Further, from the viewpoint of enhancing the absorption capacity, the absorbent material preferably contains a water-absorbent resin. More preferably, the upper absorbent layer and the lower absorbent layer constituting the absorbent laminate each contain a hydrophilic fiber and a water absorbent resin as an absorbent material. As described later, since the openings are formed in the upper and lower absorption layers, if the upper and lower absorption layers contain a hydrophilic fiber and a water-absorbent resin, the upper absorption layer is formed. In addition, the openings of the lower absorption layer can be suitably maintained in a predetermined shape, and the absorption performance of the upper absorption layer and the lower absorption layer can be enhanced.

The basis weight of the upper and lower absorbent layers is preferably 100 g / m ² or more, and 130 g or more, respectively.
/ M ² or more is more preferable, and 300 g / m ² or less is preferable, and 250 g / m ² or less is more preferable. If 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 tend to have sufficient rigidity. Therefore, the openings respectively formed in the upper and lower absorption layers can be easily maintained in a predetermined shape. If 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 weight 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 shapes (planar shapes) of the upper and lower absorbent layers are also not particularly limited. The shape of the absorbent laminate may be appropriately determined according to the application, and examples thereof include a rectangular shape, an hourglass shape, a gourd shape, and a feathered plate type.

  Openings extending in the front-rear direction are formed in the upper absorbing layer and the lower absorbing layer, and the upper opening formed in the upper absorbing layer and the lower opening formed in the lower absorbing layer are provided to overlap with each other. The lower opening extends forward of the front end of the upper opening and / or rearward of 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 shows a plan view of the absorbent laminate as viewed from the top sheet side. In the drawings of the present application, the arrow x indicates the width direction, the arrow y indicates the front-rear direction, and the direction perpendicular to the plane formed by the arrows x and y indicates the vertical direction z. Further, 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 has And a lower opening 8 extending in the front-rear direction y, overlapping the upper opening 6. The lower opening 8 extends forward of the front end of the upper opening 6 and / or rearward of the rear end of the upper opening 6. As a result, in the lower opening 8, a portion 8F forward of the front end of the upper opening 6 (hereinafter sometimes referred to as “front end”) and / or a portion rearward of 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 at 8 B (hereinafter sometimes referred to as “rear end”). In FIG. 1, the lower opening 8 is shown to extend forward from the front end of the upper opening 6 and rearward from the rear end of the upper opening 6.

  The absorbent article of the present invention is thus provided with the upper opening 6 and the lower opening 8 in the upper absorbent layer 5 and the lower absorbent layer 7, respectively, so that the urine is produced in the portion where the upper opening 6 and the lower opening 8 overlap. The diffusivity in the back and forth direction y is enhanced. Then, urine and the like diffused in the front-rear direction y at a portion where the upper opening 6 and the lower opening 8 overlap are accommodated in the pocket 9 formed in the front end 8F and / or the rear end 8B of the lower opening 8 The urine or the like contained 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 rapidly 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 generally practiced to provide the upper opening formed in the upper absorbent layer so as to overlap the lower opening formed in the lower absorbent layer. I did not get up. This is thought to be due to the possibility that urine and the like easily overflow at the overlapping portion of the upper opening and the lower opening by overlapping the upper opening and the lower opening, and that the absorption performance of the urine and the like is lowered. Be However, in the absorbent article of the present invention, urine formed by transitioning the upper opening 6 and the lower opening 8 to each other by forming the pocket 9 at the front end 8F and / or the rear end 8B of the lower opening 8 Etc. are diffused in the front-rear direction y and accommodated in the pocket 9 so that urine etc. is quickly absorbed in the pocket 9.

Further, in the absorbent article of the present invention, the absorbent laminate 4 is bent in the width direction x at a portion where the upper opening 6 and the lower opening 8 overlap, and it becomes easy to form a recess in the crotch of the wearer. Therefore, the absorbent article of the present invention is more likely to receive excrement from the wearer suitably, and side leakage is less likely to occur.

  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 in order to promote the diffusion of urine etc. in the front-rear direction y Is preferred. In FIG. 1, the shapes of the upper opening 6 and the lower opening 8 are round rectangles having 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, a gourd or the like.

  It is preferable that the upper opening 6 and the lower opening 8 be 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 when the absorbent article is worn. Thus, if the upper opening 6 and the lower opening 8 are provided, urine etc. excreted from the wearer will be promptly transferred to a portion where the upper opening 6 and the lower opening 8 overlap, and diffused in the front-back direction y at that portion It becomes easy to do.

  Although one upper opening 6 and one lower opening 8 are provided in FIG. 1, the number of the upper openings 6 and the lower openings 8 is not limited to this, and two or more may be provided. The urine excreted from the wearer is easily received at the portion where the upper opening 6 and the lower opening 8 overlap, and the diffusivity of the urine etc. in the longitudinal direction y at the portion concerned is increased. The opening 6 and the lower opening 8 are preferably formed 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 to extend in the front-rear direction y are preferably provided one by one as shown in FIG. By providing the upper opening 6 and the lower opening 8 in this manner, the absorption capacity of the absorbent laminate 4 is secured, and the absorbent laminate 4 can be easily held in a predetermined shape.

  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, as shown in FIG. If the lower opening 8 is formed in this way, pockets 9 capable of containing urine etc. are formed at both the front end 8 F and the rear end 8 B of the lower opening 8, and urine etc. is absorbed and laminated. It becomes easy to be absorbed quickly by the body 4.

  The depth (length in the front-rear direction y) of the pocket 9 formed on 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 More preferable. 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 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, further preferably 20 mm or more). If the pocket 9 is formed in this manner, urine etc. is easily accommodated in the pocket 9, and as a result, the urine etc. accommodated in the pocket 9 is formed 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. However, even if the depth of the pocket 9 is too deep, it is difficult for urine etc. to reach the back of the pocket 9 and the absorption capacity of the lower absorption layer 7 decreases. As a result, 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 150 mm or less (more preferably 130 mm or less) forward than the front end of the upper opening 6 and 150 mm or less (more preferably 130 mm) rearward than the rear end of the upper opening 6 Or less) is preferred.

The length in the front-rear direction y of a portion where the upper opening 6 and the lower opening 8 overlap (hereinafter, may be referred to as “opening overlapping portion”) is 15% or more of the length in the front-rear direction y of the absorbent laminate 4 Is preferably 20% or more, more preferably 50% or less, and still more preferably 45% or less. If the length in the front-rear direction y of the opening overlapping portion is 15% or more of the length in the front-rear direction y of the absorbent laminate 4, the length in the front-rear direction y of the opening overlapping portion is sufficiently secured. The diffusion of urine and the like is enhanced, and urine and the like are efficiently absorbed by the absorbent laminate 4. In addition, the absorbent article is bent in the width direction x to facilitate formation of a recess in the crotch region of the wearer. If the length in the front-rear direction y of the overlapping portion of the opening is 50% or less of the length in the front-rear direction y of the absorbent laminate 4, the absorbent laminate 4 does not have too many portions where no absorbent material is disposed. The absorption performance (absorption capacity and absorption speed) of the absorbent laminate 4 can be easily ensured. In FIG. 1, since the lower opening 8 is formed to extend forward from the front end of the upper opening 6 and rearward from the rear end of the upper opening 6, the length in the front-rear direction y of the overlapping portion is The length of the upper opening 6 in the front-rear direction y is equal.

  The lower opening 8 is preferably formed narrower than the upper opening 6 at a portion overlapping the upper opening 6. As described above, if the upper opening 6 and the lower opening 8 are formed, urine excreted from the wearer can be easily received at the opening overlapping portion, and urine or the like received at the opening overlapping portion is absorbed by the lower side. It is absorbed quickly by the layer 7 and it becomes difficult for urine etc. to overflow in the relevant part. Further, by forming the upper opening 6 wider than the lower opening 8, the absorbent laminate 4 is formed in the opening overlapping portion in the width direction x so as to form a recess (not a protrusion) in the crotch region of the wearer. It becomes easy to bend. In order to ensure that such an effect is achieved, the width of the upper opening 6 is preferably at least 1.2 times the width of the lower opening 8 at the overlapping portion of the opening, and is preferably 1.5 times or more. Is more preferably 5.0 times or less, and 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, and preferably 25 mm or less, more preferably 20 mm or less in the overlapping portion of the openings. When the width of the lower opening 8 is 5 mm or more at the opening overlapping portion, the diffusion of urine etc. 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 will be easier. 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 one time, it is difficult for the urine or the like to overflow at the opening overlap portion.

  The upper absorbent layer 5 and the lower absorbent layer 7 are each formed of a molded body containing hydrophilic fibers and a water absorbent resin so that urine and the like can be suitably diffused in the front-rear direction y without overflowing at the opening overlapping portion. It is preferable that the molded product of the upper absorbent layer 5 be in direct contact with the molded product of the lower absorbent layer 7. That is, it is preferable that no other member such as a tissue be 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 penetrated.

  Furthermore, it is preferable that the molded product of the upper absorbent layer 5 and the molded product of the lower absorbent layer 7 are not bonded by bonding means such as an adhesive. As a result, urine or the like is easily transferred between the upper absorbent layer 5 and the lower absorbent layer 7, and urine or the like is 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 absorbing 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 preferred that the resin content is high. Generally, an absorbent containing a hydrophilic resin and a water-absorbent resin has a higher absorption capacity as the water-absorbent resin content is higher, but the water-absorbent resin absorbs water and swells, so-called gel blocking occurs and urine The permeability of the absorber may decrease. However, in the absorbent laminate 4 used in the absorbent article of the present invention, since there is a portion where the upper opening 6 and the lower opening 8 overlap, the upper opening can be obtained even if the water absorbing resin content of the upper absorbent layer 5 is increased. Urine and the like can be transferred to the lower absorbent layer 7 through a portion where the lower opening 8 and the lower opening 8 overlap, and urine and the like are easily absorbed by both the upper absorbent layer 5 and the lower absorbent layer 7. Therefore, by making the water absorbent resin content of the molded product of the upper absorbent layer 5 high, the absorption performance of the lower absorbent layer 7 is ensured, and the so-called wetback (absorbed urine etc. absorbed phenomenon by the upper absorbent layer 5) ) Will be easier to prevent. Therefore, the urine etc. which were absorbed by absorptive layered product 4 become difficult to return to a wearer's skin, and the wearing feeling of an absorptive article improves.

  As shown in FIG. 1, the upper absorbent layer 5 is preferably formed longer in the front-rear direction y and the width direction x than the lower absorbent layer 7. In the absorbent article of the present invention, the lower absorbent layer 7 can absorb urine etc. 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 By arranging 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 can efficiently absorb urine and the like. It will contribute. Further, 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, so that the wearer has a sense of discomfort due to the difference in height between the upper absorbent layer 5 and the lower absorbent layer 7. It becomes difficult to remember, and the feeling of wearing improves.

  Next, modified examples of the absorbent laminate 4 will be described with reference to FIGS. The modification of the absorptive laminated body 4 was shown in FIGS. 2-4, respectively. In the following, portions overlapping with the description of the absorbent laminate 4 shown in FIG. 1 will not be described.

  In the embodiment shown in FIG. 2, the upper opening 6 is formed to be wide at both ends in the front-rear direction y. That is, the upper opening 6 has a front side 6F, a rear side 6B, and an intermediate part 6M between them in the front-rear direction y, and the front side 6F and the rear side 6B are formed wider than the middle 6M. ing. If the upper opening 6 is formed in this manner, the curling of the absorbent laminate 4 is relieved by the upper opening 6 even if the absorbent laminate 4 is curled when wearing the absorbent article. The fit of the absorbent laminate 4 to the wearer's skin can be enhanced. For example, in the absorbent laminate 4 shown in FIG. 2, the absorbent laminate 4 can be easily fitted to the wearer's skin even when the wearer is walking. Although the ratio of the length in the front-rear direction y of the front side portion 6F, the rear side portion 6B, and the middle portion 6M is not particularly limited, the upper opening 6 is equally divided into three in the front-rear direction y, as shown in FIG. The front side 6F, the rear side 6B, and the middle 6M may be defined.

  In the embodiment shown in FIG. 3, the lower opening 8 is formed to be wide at both ends in the front-rear direction y. That is, in the lower opening 8, the front end 8 F and the rear end 8 B which do not overlap the upper opening 6 are formed wider than the portion overlapping the upper opening 6. If the lower opening 8 is formed in this manner, urine etc. is easily accommodated in the pocket 9 formed in the front end 8F and the rear end 8B of the lower opening 8, and is accommodated in the pocket 9. The resulting urine and the like are further easily 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 more quickly. Although not shown in the drawings, 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 extends on the front side of the upper opening 6 obliquely forward on both sides in the width direction x of the upper opening 6 and on the rear slit extending obliquely backward on the upper opening 6. It has eleven. Thus, if the front side slit 10 and the rear side slit 11 are formed in the upper absorbent layer 5, the absorbent laminate 4 can be formed so as to be recessed in both the width direction x and the front and rear direction y. become. Therefore, when the absorbent article provided with such an absorbent laminate 4 is worn, excrement is suitably received, and side leakage hardly occurs. Although not shown in the drawings, only one of the front slit 10 and the rear slit 11 may be formed in the upper absorbent layer 5. Also, the front slit 10 and / or the rear slit 11 may be connected to the upper opening 6.

  In addition, the absorbent laminate 4 may be a combination of the embodiments of FIGS. 2 to 4.

  Next, configuration examples of the absorbent article of the present invention will be described with reference to FIGS. 5 and 6. 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 shows a plan view of a urine pad as an absorbent article as viewed from the top sheet side. FIG. 6 shows an AA cross section of the absorbent article of FIG. In FIG. 5, the upper side of the figure corresponds to the front side of the absorbent article, and the lower side of the figure corresponds to the rear side of the absorbent article.

  The absorbent article 1 has a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorbent laminate 4 provided therebetween. The top sheet 2 is disposed to face the skin of the wearer, and transmits excrement such as urine. The excrement passing through the top sheet 2 is accommodated by the absorbent laminate 4. The back sheet 3 prevents the excrement from leaking to the 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 extending in the front-rear direction y, and the lower absorbent layer 7 has a lower opening 8 overlapping the upper opening 6 and extending in the front-rear direction y. The lower opening 8 extends forward of the front end of the upper opening 6 and / or rearward of the rear end of the upper opening 6. Urine or the like contained 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 in the front end 8F and / or the rear end 8B of the lower opening 8 Is housed in the pocket 9 which is Therefore, in the absorbent article 1 of the present invention, the diffusion of the urine etc. contained in the absorbent laminate 4 in the front-rear direction y is enhanced, and the urine etc. is rapidly absorbed by the absorbent laminate 4. Become.

  The back sheet 3 preferably has a color different from that of the absorbent laminate 4. If the backsheet 3 has a color different from that of the absorbent laminate 4, when the absorbent article 1 is viewed from the topsheet 2 side, the backsheet 2 is made through the 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 wearing the absorbent article 1 while confirming the position of the overlapping portion of the upper opening 6 and the lower opening 8, it becomes easy to install the absorbent laminate 4 at a suitable position between the crotch of the wearer . As a color of the back sheet 2, since the absorptive laminated body 4 is generally white, blue etc. are mentioned, for example.

  As shown in FIG. 6, the upper backing 15 is provided between the top sheet 2 and the absorbent laminate 4, and the lower backing 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 less likely to be deformed. When the upper absorbent layer 5 and the lower absorbent layer 7 of the absorbent laminate 4 contain a water absorbing resin, the upper mount 15 and the lower mount 16 form a water absorbent resin on the surface of the top sheet 2 and the back sheet 3. Is prevented, and the touch of the top sheet 2 or the back sheet 3 is easily maintained well. Tissue paper, thin paper, crepe paper or the like can be used as the upper backing 15 and the lower backing 16.

  The upper backing 15 is preferably joined to the upper absorbent layer 5 by a bonding means such as an adhesive. The lower backing 16 is preferably bonded to the lower absorbent layer 7 by a bonding means such as an adhesive. If the upper backing 15 is joined to the upper absorbent layer 5, the shape retention of the upper absorbent layer 5 is enhanced, and the shape of the upper opening 6 formed in the upper absorbent layer 5 is easily maintained. Similarly, when the lower backing 16 is joined 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. It will be easier to maintain. As described above, it is preferable that the upper absorption layer 5 and the lower absorption layer 7 are not joined to each other.

In the absorbent article 1, the longitudinal direction y of the absorbent laminate 4 is provided on both sides in the width direction x of the absorbent laminate 4.
A rising flap 12 may be provided extending to the In FIG. 5 and FIG. 6, the side sheet 13 extending in the front-rear direction y is joined to both sides in the width direction x of the top sheet 2, and the elastic for standing up provided at the inward end in the width direction x of the side sheet 13. The contraction force of the member 14 causes the inward end of the side sheet 13 to rise toward the wearer's skin, thereby forming the rising flap 12. The rising flaps 12 prevent lateral leakage of urine or the like in the width direction x. The side sheet 13 is made of a liquid impermeable plastic film, a liquid impermeable nonwoven, or the like. In addition, the inner surface of the edge part of the front-back direction y may be joined on the top sheet 2 for the standup flap 12, and standup of the standup flap 12 becomes easy by this.

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 (8)

An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent laminate provided therebetween.
The absorbent laminate has an anteroposterior 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 extending in the front-rear direction, overlapping the upper opening.
The lower opening extends forward from the front end of the upper opening, a portion forward of the front end of the upper opening is covered with the upper absorbent layer, and extends rearward from the rear end of the upper opening, An absorbent article characterized in that a portion behind the rear end of the upper opening is covered with the upper absorbent layer.   The absorbent article according to claim 1, wherein each of the upper opening and the lower opening has a rounded rectangular shape which is long in the front-rear direction.   The absorbent article according to claim 1 or 2, wherein the length in the front-rear direction of a portion where the upper opening and the lower opening overlap is 20% or more of the length in the front-rear direction of the absorbent laminate.   The lower opening extends 10 mm or more forward of the front end of the upper opening, and extends 10 mm or more backward than the rear end of the upper opening. The absorbent article as described in. The upper absorbent layer and the lower absorbent layer are respectively formed of a molded body containing hydrophilic fibers and a water absorbing resin,
The absorbent article according to any one of claims 1 to 4, wherein the shaped body of the upper absorbent layer is in direct contact with the shaped body of the lower absorbent layer. The upper absorbent layer and the lower absorbent layer are respectively formed of a molded body containing hydrophilic fibers and a water absorbing resin,
The absorbent article according to any one of claims 1 to 5, wherein the molded product of the upper absorbent layer has a water-absorbent resin content higher than that of the molded product of the lower absorbent layer.   The absorbent article according to any one of claims 1 to 6, wherein the upper absorbent layer is formed longer in the front-rear direction and the width direction than the lower absorbent layer.   The absorbent article according to any one of claims 1 to 7, wherein the back sheet has a color different from that of the absorbent laminate.

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