JP3241330U - absorbent article - Google Patents

Abstract

An object of the present invention is to provide an absorbent article that can effectively utilize the absorption capacity of an absorbent core and is excellent in absorbing urine and the like. An absorbent article having a top sheet, a back sheet, and an absorbent core 4 disposed therebetween, wherein the absorbent core 4 has a front side portion 4F and a rear side portion 4R which are more inclined than a central portion 4C. The width of the front intermediate portion 4FM and the rear intermediate portion 4RM are each formed so as to gradually decrease from the front portion 4F or the rear portion 4R toward the central portion 4C. An opening or recess 5 extending in the front-rear direction is provided on the central line CX of the direction, and the center CY of the absorbent core 4 in the front-rear direction is located in the rear intermediate portion 4RM of the absorbent core 4. has an inclined line portion extending from the outside to the inside in the width direction from the rear side to the front side, and the virtual line 11 extending the inclined line portion is the center line in the width direction of the absorbent core 4 It intersects with CX on the front side of the front end 5FE of the opening or recess 5 . [Selection drawing] Fig. 3

Description

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

2. Description of the Related Art Conventionally, there has been known an absorbent article having a top sheet, a back sheet, and an absorbent core disposed therebetween, in which the absorbent core is provided with openings or recesses (for example, , Patent Documents 1 to 5). By providing openings and recesses in the absorbent core, the diffusibility of urine and the like in the absorbent core is enhanced, and the absorption capacity of the absorbent core can be easily utilized over a wide range.

JP 2007-202576 A JP 2008-284190 A Japanese Patent Application Laid-Open No. 2017-047100 JP 2019-041875 A Japanese Patent Application Laid-Open No. 2021-013676

In absorbent articles, it is desirable that the absorption capacity of the absorbent core is utilized as effectively as possible so that more urine and the like can be absorbed, and further improvements are required. The present invention has been made in view of the above circumstances, and its object is to provide an absorbent article that can effectively utilize the absorption capacity of the absorbent core and has excellent absorption of urine and the like. .

The absorbent article of the present invention that can solve the above problems is an absorbent article that has a front-rear direction and a width direction, and has a top sheet, a back sheet, and an absorbent core disposed therebetween. The absorbent core has, from the front side in the front-rear direction, a front side portion, a front intermediate portion, a central portion, a rear intermediate portion, and a rear side portion, and the front side portion and the rear side portion are wider than the central portion. The front intermediate portion and the rear intermediate portion are formed such that the width gradually decreases from the front side portion or the rear side portion toward the center portion; An opening or recess is provided; when the relative position of the absorbent core in the front-back direction is 0% at the front end and 100% at the rear end, the front end of the opening or recess is in the range of 15% to 30%. The rear end of the opening or recess is located in the range of 60% to 85%; the center of the absorbent core in the front-rear direction is located in the middle rear part; The outer edge has an inclined line portion extending from the outer side to the inner side in the width direction from the rear side to the front side, and the virtual line extending the inclined line portion is the center line in the width direction of the absorbent core and the opening. Alternatively, it is characterized in that it intersects on the front side of the front end of the recess.

In the absorbent article of the present invention, when urine or the like is excreted from the wearer, the urine or the like is diffused in the front-rear direction through the openings or recesses of the absorbent core, and the urine or the like spreads in the front-rear direction of the absorbent core. Efficient and easy to absorb over a range. At this time, the center of the absorbent core in the front-rear direction is positioned at the rear-side intermediate portion of the absorbent core, so that the rear-side portion of the absorbent core is formed long in the front-rear direction, thereby ensuring the absorption capacity of the absorbent core. be able to. In addition, the absorbent core is formed so that the imaginary line extending from the inclined line portion of the outer edge of the rear intermediate portion intersects the center line in the width direction of the absorbent core and the front side of the front end of the opening or recess. Therefore, when urine, etc. spreads from the urinating part toward the rear in the width direction, the urine, etc. tends to migrate to the vicinity of the outer edge of the absorbent core near the boundary between the rear intermediate part and the rear side part. Absorption capacity of the portion can be effectively utilized. Therefore, according to the absorbent article of the present invention, the absorption capacity of the absorbent core is effectively utilized over a wide range, resulting in excellent absorption of urine and the like.

In the absorbent core, the front end of the opening or recess is preferably located in the front intermediate portion. If the opening or recess is formed in this way, when the wearer is in the prone position, urine or the like moves to the front end of the opening or recess and spreads outward in the width direction from there. Or, when it spreads outward in the width direction toward the front, the wide front side portion facilitates absorption of urine and the like.

The outer edge of the front intermediate portion of the absorbent core has a slanted line portion extending from the outer side to the inner side in the width direction from the front side to the rear side, and the virtual line extending the slanted line portion is the absorptive core. It is preferable that the center line in the width direction and the center line in the front-rear direction of the absorbent core intersect on the rear side. If the absorbent core is formed in this way, when the wearer is standing or sitting, urine or the like passes through the opening or recess to near the center of the absorbent core in the front-rear direction, and then, The vicinity of the outer edge of the absorbent core near the boundary between the front side portion and the front side middle portion when urine, etc. spreads outward in the width direction from there, such as when the wearer is in a prone position. The absorption capacity of is likely to be favorably utilized.

The outer edge of the back side portion of the absorbent core has a straight portion extending in the front-rear direction, and the straight portion has a length of 20% or more and 45% or less of the length in the front-rear direction of the absorbent core, and the opening Alternatively, it is preferable that the rear end of the concave portion overlaps the straight portion in the front-rear direction. If the absorbent core is formed in this way, the absorption capacity of the rear side of the absorbent core can be easily ensured, and urine and the like migrate to the rear side end of the opening or recess, and from there, the absorbent core When urine or the like is absorbed, the wide rear side portion facilitates efficient absorption of urine or the like.

Preferably, the absorbent core is provided with recesses rather than openings. That is, it is preferable that a recess is provided as the opening or recess. As a result, it becomes easier to ensure the diffusibility of urine and the like in the width direction in the absorbent core, and the absorption capacity of the absorbent core can be utilized more effectively.

Preferably, the absorbent core has approximately the same width at the front and back sides. As a result, the rear portion is formed slim in the width direction, and when the absorbent article is worn, the absorbent core does not become bulky on the buttocks of the wearer.

The width of the front side portion and the width of the rear side portion of the absorbent core are preferably 1.2 times or more and 1.4 times or less of the width of the central portion. By setting the width of the front side portion and the width of the rear side portion to be 1.2 times or more of the width of the central portion, the central portion can be formed to have a narrow width. Easier to move your legs. On the other hand, by setting the width of the front side portion and the width of the rear side portion to 1.4 times or less of the width of the central portion, the front side portion and the rear side portion are formed slim in the width direction, and the feeling of wearing the absorbent article is improved. can be improved.

In the absorbent article of the present invention, when urine or the like is excreted from the wearer, the urine or the like is diffused in the front-rear direction through the openings or recesses of the absorbent core, and the urine or the like spreads in the front-rear direction of the absorbent core. Efficient and easy to absorb over a range. At this time, the center of the absorbent core in the front-rear direction is positioned at the rear-side intermediate portion of the absorbent core, so that the rear-side portion of the absorbent core is formed long in the front-rear direction, thereby ensuring the absorption capacity of the absorbent core. be able to. In addition, the absorbent core is formed so that the imaginary line extending from the inclined line portion of the outer edge of the rear intermediate portion intersects the center line in the width direction of the absorbent core and the front side of the front end of the opening or recess. Therefore, when urine, etc. spreads from the urinating part toward the rear in the width direction, the urine, etc. tends to migrate to the vicinity of the outer edge of the absorbent core near the boundary between the rear intermediate part and the rear side part. Absorption capacity of the portion can be effectively utilized. Therefore, according to the absorbent article of the present invention, the absorption capacity of the absorbent core is effectively utilized over a wide range, resulting in excellent absorption of urine and the like.

An example of the absorbent article of this invention is represented, and the top view which looked at the absorbent article from the skin surface side is represented. 2 shows a II-II cross-sectional view of the absorbent article shown in FIG. 1; FIG. The top view of the absorbent core with which the absorbent article shown in FIG. 1 was equipped is represented. Fig. 4(a) represents a plan view of an absorbent core, Fig. 4(a) represents an absorbent core according to the present invention, and Fig. 4(b) represents a comparative absorbent core.

The absorbent article of the present invention will be described with reference to the drawings. The invention is not limited to the embodiments shown in the drawings. 1 to 3 show configuration examples of a urine pad as an example of the absorbent article of the present invention. FIG. 1 shows a plan view of the absorbent article (urinary pad) viewed from the skin side, FIG. 2 shows a II-II cross-sectional view of the absorbent article shown in FIG. 1, and FIG. 2 shows a plan view of an absorbent core provided in the absorbent article shown in FIG. 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 and y represents the thickness direction z. 1 and 3, the upper side of the drawing corresponds to the front side of the absorbent article, and the lower side of the drawing corresponds to the rear side of the absorbent article.

The absorbent article 1 has a topsheet 2, a backsheet 3, and an absorbent core 4 provided therebetween. The top sheet 2 is arranged on the skin surface side of the absorbent core 4 and is a sheet positioned on the wearer's side when the absorbent article 1 is worn. The back sheet 3 is a sheet arranged on the outer surface side of the absorbent core 4 and located on the side opposite to the wearer when the absorbent article 1 is worn. Urine and the like excreted by the wearer pass through the top sheet 2 and are accommodated by the absorbent core 4 . The back sheet 3 prevents excrement from leaking to the outside.

The absorbent article 1 has a front-rear direction y and a width direction x. The front-rear direction y corresponds to the direction extending in the front-rear direction between the wearer's crotch when the absorbent article 1 is worn. The width direction x means a direction on the same plane as the absorbent article 1 and perpendicular to the front-rear direction y, and corresponds to the lateral direction of the wearer when wearing the absorbent article 1 . Further, the skin surface side of the absorbent article 1 means the side facing the skin of the wearer when the absorbent article 1 is worn, and the outer surface side of the absorbent article 1 means that the absorbent article 1 is worn. means the side facing away from the actual wearer.

The topsheet 2 is preferably liquid permeable. The top sheet 2 may be, for example, a nonwoven fabric made of hydrophilic fibers such as cellulose, rayon, or cotton, or a hydrophobic material such as polyolefin (eg, polypropylene, polyethylene), polyester (eg, PET), polyamide (eg, nylon). A nonwoven fabric formed from hydrophobic fibers in which the surface of hydrophobic fibers is hydrophilized with a surfactant can be used. Moreover, as the top sheet 2, a woven fabric, a knitted fabric, a perforated plastic film, or the like may be used.

The backsheet 3 is preferably liquid-impermeable. As the back sheet 3, a nonwoven fabric formed from hydrophobic fibers such as polyolefin (eg, polypropylene, polyethylene), polyester (eg, PET), polyamide (eg, nylon), plastic film, or the like can be used. A laminate of a nonwoven fabric and a plastic film can also be used as the back sheet 3 .

The absorbent article 1 is preferably provided with rising flaps 6 on both sides in the width direction x on the skin surface side. By providing the rising flap 6, lateral leakage of urine or the like is prevented. The rising flaps 6 are formed by, for example, joining side sheets 7 extending in the front-rear direction y to both sides of the top sheet 2 in the width direction x, and attaching elastic members 8 for rising to the inner portions of the side sheets 7 in the width direction x. It can be formed by providing By providing the side sheets 7 and the standing elastic members 8 in this manner, the contractile force of the standing elastic members 8 causes the inner portions of the side sheets 7 in the width direction x to rise toward the wearer's skin, and the standing flaps. 6 is formed. The rising flap 6 or the side sheet 7 is preferably made of liquid-impermeable plastic film, liquid-impermeable non-woven fabric, or the like.

As the nonwoven fabric constituting each sheet described above, a spunbond nonwoven fabric, a point-bond nonwoven fabric, an air-through nonwoven fabric, a meltblown nonwoven fabric, an air-laid nonwoven fabric, a spunlaced nonwoven fabric, a tow-spread nonwoven fabric, an SMS nonwoven fabric, or the like can be used. The mass per unit area of each of these sheets is preferably 8 g/m ² or more, more preferably 10 g/m ² or more, and preferably 40 g/m ² or less, more preferably 30 g/m ² or less.

The absorbent core 4 is not particularly limited as long as it contains an absorbent material capable of absorbing excrement such as urine. As the absorbent core 4, for example, a molded body obtained by molding an absorbent material into a predetermined shape can be used. The absorbent core 4 may be covered with a cover sheet such as a paper sheet (for example, tissue paper or thin paper) or liquid-permeable nonwoven fabric. Examples of absorbent materials include hydrophilic fibers such as pulp fibers, and water absorbent resins such as polyacrylic acid-based, polyaspartic acid-based, cellulose-based, and starch-acrylonitrile-based materials. The absorbent material may also 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 are preferably made hydrophilic by being hydrophilized with a surfactant or the like in order to increase affinity with urine or the like.

The absorbent material preferably contains at least hydrophilic fibers in order to increase the rate of absorption of urine and the like. Moreover, from the viewpoint of increasing the absorption capacity, the absorbent material preferably contains a water absorbent resin. Therefore, the absorbent core preferably contains hydrophilic fibers (especially pulp fibers) and water absorbent resin. In this case, it is preferable to use, for example, an aggregate of hydrophilic fibers mixed with or sprinkled with a water absorbent resin.

The absorbent core 4 may be composed of a single layer or multiple layers. For example, the absorbent core 4 may have an upper absorbent layer and a lower absorbent layer.

The mass per unit area of the absorbent core 4 is, for example, preferably 60 g/m ² or more, more preferably 75 g/m ² or more, still more preferably 80 g/m ² or more, and preferably 1000 g/m ² or less. /m ² or less is more preferable, and 900 g/m ² or less is even more preferable. The weight per unit area of the hydrophilic fibers contained in the absorbent core 4 is preferably 60 g/m ² or more, more preferably 75 g/m ² or more, still more preferably 80 g/m ² or more, and 600 g/m ² or less. is preferred, 550 g/m ² or less is more preferred, and 500 g/m ² or less is even more preferred. When the absorbent core 4 is composed of multiple layers, it is preferable that the total mass per unit area of the multiple layers of absorbent cores or the hydrophilic fibers contained therein falls within this range. As described later, the absorbent core 4 is provided with openings or recesses, but the mass per unit area of the absorbent core 4 or the hydrophilic fibers contained in the absorbent core 4 described above is Alternatively, it means the average value of the mass per unit area of the absorbent core 4 or the hydrophilic fibers contained in the absorbent core 4 in the portion other than the concave portion.

The absorbent core 4 has a substantially hourglass shape. Specifically, as shown in FIG. 3 , the absorbent core 4 includes, from the front side in the front-rear direction y, a front side portion 4F, a front intermediate portion 4FM, a central portion 4C, a rear intermediate portion 4RM, and a rear portion 4R. The front side portion 4F and the rear side portion 4R are formed wider than the central portion 4C, and the front side intermediate portion 4FM and the rear side intermediate portion 4RM are respectively widened from the front side portion 4F or the rear side portion 4R toward the central portion 4C. is formed so as to gradually decrease. By forming the absorbent core 4 in this way, the central portion 4C of the absorbent core 4 is less likely to be pressed by the wearer's legs, and the absorbent core 4 is less likely to be distorted when the absorbent article 1 is worn. .

The absorbent core 4 is formed such that the front side portion 4F and the rear side portion 4R are longer in the width direction x than the central portion 4C. The absorbent core 4 is formed widest at the front side portion 4F and/or the rear side portion 4R. The length in the width direction x of the front side portion 4F and the length in the width direction x of the rear side portion 4R may be the same or different. The outer edge of the absorbent core 4 extends from the outer side to the inner side in the width direction x from the front side to the rear side at the front side middle section 4FM, and extends from the outside in the width direction x from the rear side to the front side at the rear side middle section 4RM. It is formed so as to extend inward from the side. The absorbent core 4 is formed such that the entire front intermediate portion 4FM and the entire rear intermediate portion 4RM are wider than the entire central portion 4C.

The absorptive core 4 preferably has portions with a constant length in the width direction x in the front side portion 4F, the central portion 4C and the rear side portion 4R. Therefore, the outer edge of the absorbent core 4 preferably has straight portions extending in the front-rear direction y in the front side portion 4F, the central portion 4C and the rear side portion 4R. The absorbent core 4 may be formed so that the front portion of the front portion 4F is narrower than the rear portion of the front portion 4F, and the rear portion of the rear portion 4R is wider than the rear portion 4R. It may be formed narrower than the portion on the front side thereof. On the other hand, the central portion 4C may be formed to have a uniform length in the width direction x over the entire length in the front-rear direction y. That is, the central portion 4C may be formed to have a uniform length in the width direction x between the front intermediate portion 4FM and the rear intermediate portion 4RM.

The center CY of the absorbent core 4 in the front-rear direction y is positioned at the rear intermediate portion 4RM. By forming the absorbent core 4 in this manner, the wide rear side portion 4R can be formed long in the front-rear direction y, and the absorbent core 4 can ensure an absorbent capacity. In addition, the central portion 4C formed narrow in the width direction x can be positioned near the center CY in the front-rear direction y of the absorbent core 4, and when the absorbent article 1 is worn, the wearer moves his/her legs. easier. It is more preferable that the center CY of the absorbent core 4 in the front-rear direction y be located in the center 3/5 area when the rear intermediate portion 4RM is equally divided into 5 in the front-rear direction y.

The absorbent core 4 is preferably formed long in the front-rear direction y. Specifically, the length in the front-rear direction y is preferably at least 1.5 times the length in the width direction x. 0 times or more is more preferable, 3.5 times or less is preferable, and 3.0 times or less is more preferable.

1 to 3, the absorbent core 4 is provided with a recess 5 extending in the front-rear direction y. The recess 5 is provided on the center line CX of the absorbent core 4 in the width direction x. By providing the absorbent core 4 with the concave portion 5 , the concave portion 5 functions as a diffusion path for urine and the like, and urine and the like can easily diffuse along the concave portion 5 . As a result, urine or the like is quickly absorbed by the absorbent core 4, and the absorbent core 4 easily contributes to the absorption of urine or the like over a wide range. Although not shown in the drawings, the absorbent core 4 may be provided with openings instead of the recesses 5 .

The opening is provided through the absorbent core 4 in the thickness direction z. On the other hand, the recesses 5 are formed by partially reducing the basis weight (mass per unit area) of the absorbent core 4 . In this case, it is preferable that the concave portion 5 is formed so that the basis weight is 70% by mass or less, more preferably 60% by mass or less, of the portion other than the concave portion 5 . When the recessed portions 5 are formed in the absorbent core 4 , the recessed portions 5 are preferably formed on the surface of the absorbent core 4 on the side of the top sheet 2 . On the other hand, it is preferable that no concave portion is formed on the surface of the absorbent core 4 on the back sheet 3 side. When the absorbent core 4 is composed of an upper absorbent layer on the top sheet 2 side and a lower absorbent layer on the back sheet 3 side, an opening is formed in the upper absorbent layer, and the lower absorbent layer covers the opening. By being provided, the recesses 5 can be formed on the surface of the absorbent core 4 on the side of the top sheet 2 .

A preferred embodiment of the recess 5 provided in the absorbent core 4 will be described below, but the following description of the recess 5 also applies to openings provided in the absorbent core 4 . In order to increase the absorption capacity of the absorbent core 4, it is preferable that the absorbent core 4 is provided with recesses 5 rather than openings. Further, by providing the absorbent core 4 with the concave portion 5 , it becomes easier to ensure the diffusibility of urine or the like in the width direction of the absorbent core 4 .

The recess 5 is provided on the center line CX of the absorbent core 4 in the width direction x so as to extend in the front-rear direction y. That is, the recess 5 is provided so as to overlap with the center line CX of the absorbent core 4 in the width direction x and extend in the front-rear direction y along the center line CX. The concave portion 5 is formed such that the length in the front-rear direction y is longer than the length in the width direction x. Preferably, the absorbent core 4 is provided with only one recess 5 .

Assuming that the front end 4FE is 0% and the rear end 4RE is 100% as the relative position of the absorbent core 4 in the front-rear direction y, the front end 5FE of the recess 5 is located in the range of 15% to 30%, and the recess 5 The rear end 5RE of is located in the range of 60% to 85%. By positioning the front end 5FE of the recess 5 in the range of 15% to 30% in the front-rear direction y of the absorbent core 4, when the absorbent article 1 is worn, the recess 5 faces the urination part of the wearer. It becomes easy to position, and the urine etc. excreted from the wearer become easy to spread|diffuse in the front-back direction y in the recessed part 5. As shown in FIG. In addition, since the concave portion 5 does not extend to the front end 4FE of the absorbent core 4, even if urine or the like spreads to the front end 5FE of the concave portion 5, the absorbent core 4 present on the front side of the urine or the like favors urine or the like. , and urine or the like is less likely to leak from the front end 4FE of the absorbent core 4 . The front end 5FE of the concave portion 5 is preferably located in the range of 18% to 25% of the absorbent core 4 in the front-rear direction y. On the other hand, since the rear end 5RE of the recessed portion 5 is located in the range of 60% to 85% in the front-rear direction y of the absorbent core 4, urine or the like passes through the recessed portion 5 to reach the rear portion of the absorbent core 4. It becomes easy to diffuse, and it becomes easy to effectively utilize the absorption capacity of the absorptive core 4. - 特許庁In addition, since the concave portion 5 does not extend to the rear end 4RE of the absorbent core 4, even if urine or the like spreads to the rear end 5RE of the concave portion 5, the absorbent core 4 existing behind it absorbs the urine. etc. are preferably absorbed, and leakage of urine etc. from the rear end 4RE of the absorbent core 4 is less likely to occur. The rear end 5RE of the recessed portion 5 is preferably located in the range of 65% to 80% of the absorbent core 4 in the front-rear direction y.

The length in the width direction x of the concave portion 5 is preferably 5% or more, more preferably 8% or more, of the length in the width direction x of the narrowest portion of the central portion 4C of the absorbent core 4. Moreover, it is preferably 25% or less, more preferably 20% or less, and even more preferably 18% or less. The width of the recess 5 is preferably 5 mm or more, more preferably 10 mm or more, and preferably 25 mm or less, more preferably 20 mm or less.

In addition, the shape, length, and relative position of the absorbent core 4 described above, when the absorbent core 4 is composed of multiple layers, the overall shape and length of the absorbent core 4 composed of multiple layers , means relative position. The same applies to the following.

In the absorbent core 4, the outer edge of the rear intermediate portion 4RM has an inclined line portion extending from the outside to the inside in the width direction x from the rear side to the front side. The slanted line portion of the outer edge of the rear intermediate portion 4RM means a linear portion that extends obliquely with respect to the front-rear direction y. extends at an angle to the In the absorbent core 4, the imaginary line 11 obtained by extending the inclined line portion of the outer edge of the rear intermediate portion 4RM intersects the center line CX of the absorbent core 4 in the width direction x on the front side of the front end 5FE of the recess 5. is formed as In FIG. 3, the imaginary line 11 extending the inclined line portion of the outer edge of the rear intermediate portion 4RM intersects the center line CX of the absorbent core 4 in the width direction x at a point P1. By forming the absorbent core 4 in this way, the absorbent capacity near the outer edge of the absorbent core 4 in the vicinity of the boundary between the rear intermediate portion 4RM and the rear portion 4R can be preferably utilized.

This will be described in detail with reference to FIG. In FIG. 4( a ), a virtual line 11 extending the inclined line portion of the outer edge of the rear intermediate portion 4RM is located forward of the centerline CX of the absorbent core 4 in the width direction x and the front end 5FE of the recessed portion 5 . The absorbent core 4 (4A) formed so as to intersect with is shown, and in FIG. The absorbent core 4 (4B) formed to intersect the center line CX in the width direction x of the core 4 behind the front end 5FE of the recess 5 is shown.

Urine or the like excreted in the absorbent article normally spreads rearward from the urination part 13 in the width direction x when the wearer is standing or sitting. At this time, in the absorbent core 4A shown in FIG. 4(a), when the absorbent core 4A spreads rearward from the urinating portion 13 in the width direction x, the absorption near the boundary between the rear intermediate portion 4RM and the rear portion 4R Urine and the like also easily migrate to the vicinity of the outer edge of the core 4, that is, the portion circled by the dotted line in FIG. Further, in the concave portion 5, even if urine or the like moves from the urinating portion 13 to the front end 5FE of the concave portion 5 and spreads rearward in the width direction x from there, the rear intermediate portion 4RM and the rear side portion Urine or the like is likely to migrate to the vicinity of the outer edge of the absorbent core 4 in the vicinity of the boundary of 4R. On the other hand, in the absorbent core 4B shown in FIG. 4(b), when the urinating portion 13 and the front end 5FE of the recess 5 are diffused rearward in the width direction x, the rear intermediate portion 4RM and the rear portion In the vicinity of the outer edge of the absorbent core 4 near the boundary of 4R, that is, in the portion surrounded by the dotted line in FIG.

The virtual line 11 extending the inclined line portion of the outer edge of the rear intermediate portion 4RM preferably intersects the center line CX of the absorbent core 4 in the width direction x at the front portion 4F. On the other hand, the virtual line 11 extending the inclined line portion of the outer edge of the rear intermediate portion 4RM intersects the center line CX of the absorbent core 4 in the width direction x on the rear side of the front end 4FE of the absorbent core 4. is preferred. By forming the outer edge of the rear intermediate portion 4RM in this way, it is easy to form the central portion 4C near the center CY in the front-rear direction y of the absorbent core 4 or to form the central portion 4C narrow. This makes it easier for the wearer to move their legs when wearing the absorbent article 1 . The phantom line 11 divides the front end 5FE of the recess 5 and the front end 4FE of the absorbent core 4 into three equal parts in the front-rear direction y. It is more preferable to intersect the center line CX of the absorbent core 4 in the width direction x in the 2/3 area on the front side edge 4FE side of the absorbent core 4 between the edges 4FE. The inclined line portion of the outer edge of the rear intermediate portion 4RM, that is, the virtual line 11 forms an angle with the front-rear direction y of preferably 18° or more, more preferably 20° or more, and preferably 30° or less. ° or less is more preferable.

The front end 5FE of the recess 5 is preferably located in the front intermediate portion 4FM. If the concave portion 5 is formed in this way, when the wearer is in the prone position, urine or the like moves to the front end 5FE of the concave portion 5 and spreads outward in the width direction x from there. Alternatively, when the urine spreads outward in the width direction x toward the front, the wide front side portion 4F facilitates absorption of urine and the like.

The outer edge of the front intermediate portion 4FM of the absorbent core 4 has an inclined line portion extending from the outside to the inside in the width direction x from the front side to the rear side, and the virtual line 12 extending the inclined line portion is It is preferable that the center line CX in the width direction x of the absorbent core 4 intersects behind the center CY in the front-rear direction y of the absorbent core 4 . If the absorbent core 4 is formed in this way, when the wearer stands up or sits down, urine or the like passes through the concave portion 5 and moves to the vicinity of the center CY of the absorbent core 4 in the front-rear direction y. After that, when the wearer is in a prone position or the like and urine or the like spreads forward from there so as to spread outward in the width direction x, the absorption near the boundary between the front side portion 4F and the front side intermediate portion 4FM The absorption capacity near the outer edge of the elastic core 4 is likely to be preferably utilized.

On the other hand, the virtual line 12 extending from the inclined line portion of the front intermediate portion 4FM preferably intersects the center line CX of the absorbent core 4 in the width direction x on the front side of the rear end 5RE of the recess 5. By forming the outer edge of the front intermediate portion 4FM in this way, it becomes easy to secure the length of the center portion 4C in the front-rear direction y and to form the center portion 4C narrowly, thereby improving the absorbent article 1. When worn, it makes it easier for the wearer to move their legs. The inclined line portion of the outer edge of the front intermediate portion 4FM, that is, the virtual line 12 forms an angle with the front-rear direction y of preferably 20° or more, more preferably 22° or more, and preferably 35° or less, such as 32°. The following are more preferred.

The rear end 5RE of the recessed portion 5 is preferably positioned in the rear portion 4R, and more preferably in the front 2/3 region of the rear portion 4R. If the concave portion 5 is formed in this way, when urine or the like migrates to the rear end 5RE of the concave portion 5 and spreads outward in the width direction x from there, the rear side formed wide The portion 4R facilitates absorption of urine and the like.

In order to secure the wide rear portion 4R of the absorbent core 4 in the front-rear direction y, the outer edge of the rear portion 4R of the absorbent core 4 has a straight portion extending in the front-rear direction y. The portion preferably has a length of 20% or more and 45% or less, more preferably 22% or more and 40% or less of the length of the absorbent core 4 in the front-rear direction y. By forming the rear portion 4R in this way, it becomes easier to secure the absorption capacity in the rear portion 4R of the absorbent core 4. FIG. In this case, the rear portion 4R of the absorbent core 4 is preferably formed to be the widest in the straight portion.

It is preferable that the rear end 5RE of the recessed portion 5 overlaps the straight portion of the outer edge of the rear portion 4R of the absorbent core 4 in the front-rear direction y. If the concave portion 5 is formed in this way, urine or the like moves to the rear end 5RE of the concave portion 5, and when urine or the like is absorbed by the absorbent core 4 from there, the wide rear portion is formed. 4R facilitates efficient absorption of urine and the like.

The absorbent core 4 has a straight portion extending in the front-rear direction y from the outer edge of the front side portion 4F, and the length of the straight portion is 2% or more and 15% or less of the length of the absorbent core 4 in the front-rear direction y. It is preferable to have a length of 3% or more and 12% or less. By forming the front side portion 4F in this way, it becomes easier to ensure the absorption capacity of the front side portion 4F of the absorbent core 4 . In this case, the front portion 4F of the absorbent core 4 is preferably formed to be the widest in the straight portion.

The absorbent core 4 has a straight portion extending in the front-rear direction y at the outer edge of the central portion 4C. It is preferable to have a length of 15% or more and 25% or less. By forming the central portion 4C in this way, the length of the central portion 4C in the front-rear direction y is ensured, and when the absorbent article 1 is worn by the wearer, the wearer's legs can be easily moved.

In the absorbent core 4, the length of the front intermediate portion 4FM in the front-rear direction y is preferably 4% or more, more preferably 6% or more, or 15% of the length of the absorbent core 4 in the front-rear direction y. The following is preferable, and 10% or less is more preferable. By forming the front intermediate portion 4FM in this manner, the length of the central portion 4C in the front-rear direction y can be easily ensured, and when the absorbent article 1 is worn by the wearer, the wearer's legs can be easily moved. Moreover, it becomes easy to ensure the absorption capacity in the front part 4F of an absorptive core.

In the absorbent core 4, the length of the back intermediate portion 4RM in the front-rear direction y is preferably 6% or more, more preferably 8% or more, of the length of the absorbent core 4 in the front-rear direction y. % or less is preferable, and 18% or less is more preferable. By forming the rear intermediate portion 4RM in this manner, the length of the central portion 4C in the front-rear direction y can be easily ensured, and when the absorbent article 1 is worn by the wearer, the wearer's legs can be easily moved. In addition, it becomes easier to secure the absorption capacity in the rear portion 4R of the absorbent core.

The absorbent core 4 preferably has substantially the same width at the front side portion 4F and the rear side portion 4R. That is, in the absorbent core 4, the maximum length in the width direction x of the front portion 4F and the maximum length in the width direction x of the rear portion 4R are preferably substantially the same. As a result, the rear portion 4R is formed slim in the width direction x, and when the absorbent article 1 is worn, the absorbent core 4 is less bulky on the buttocks of the wearer. The fact that the front side portion 4F and the rear side portion 4R have approximately the same width means that the difference between the width of the front side portion 4F and the width of the rear side portion 4R is within 15 mm (preferably within 10 mm).

The width of the front portion 4F and the width of the rear portion 4R of the absorbent core 4 are preferably 1.2 times or more and 1.4 times or less of the width of the central portion 4C. By setting the width of the front side portion 4F and the width of the rear side portion 4R to be 1.2 times or more the width of the central portion 4C, the central portion 4C can be formed to be narrow, and when the absorbent article 1 is worn, In addition, it makes it easier for the wearer to move the legs. On the other hand, by setting the width of the front side portion 4F and the width of the rear side portion 4R to 1.4 times or less of the width of the central portion 4C, the front side portion 4F and the rear side portion 4R are formed slim in the width direction x, and absorb It is possible to improve the wearing feeling of the sexual article 1 .

As described above, the absorbent article of the present invention has been described with reference to the drawings, but the absorbent article of the present invention is not limited to urine pads as shown in the drawings, and may be disposable diapers, light incontinence pads, sanitary napkins, and the like. There may be. In addition, the absorbent article of the present invention can be particularly suitably applied to a urine pad.

When the absorbent article is a disposable diaper, the disposable diaper is composed of, for example, a front abdomen portion, a back portion, and a crotch portion positioned therebetween and provided with an absorbent core. The front abdomen corresponds to the part that is brought into contact with the abdomen of the wearer when wearing the disposable diaper, and the back part corresponds to the part of the wearer that is brought into contact with the back of the wearer when wearing the disposable diaper. The crotch portion is positioned between the front abdomen and the rear portion and corresponds to the part that is applied to the wearer's crotch.

The disposable diaper may be a tape-type disposable diaper or a pants-type disposable diaper. Tape-type disposable diapers are configured, for example, by providing fastening members at both ends in the width direction of the back portion, and by fastening the fastening members to the front abdomen, the diaper is formed into a pants shape when worn. can be done. A pants-type disposable diaper has a pants-like shape with a waist opening and a pair of leg openings, and is formed in a pants-like shape before being worn.

When the absorbent article is a disposable diaper, the disposable diaper comprises, for example, a laminate having an absorbent core disposed between a topsheet and a backsheet, and having a front abdomen portion, a back portion, and a crotch portion positioned therebetween. and The disposable diaper also includes an absorbent body having an absorbent core disposed between the topsheet and the backsheet at the crotch portion of an exterior member having a front abdomen, a back portion, and a crotch portion located therebetween. Can also be configured. In the latter case, a pants-type disposable diaper can be obtained by forming the exterior member in the shape of pants.

1: Absorbent article 2: Top sheet 3: Back sheet 4: Absorbent core 4F: Front part 4FM: Front middle part 4C: Central part 4RM: Rear middle part 4R: Rear part 5: Recess , 5FE: front end, 5RE: rear end 11, 12: virtual line

Claims (7)

An absorbent article having a front-rear direction and a width direction and having a top sheet, a back sheet, and an absorbent core disposed therebetween,
The absorbent core has, from the front side in the front-rear direction, a front side portion, a front intermediate portion, a central portion, a rear intermediate portion, and a rear side portion, and the front side portion and the rear side portion are formed wider than the central portion. , the front intermediate portion and the rear intermediate portion are formed so that the width gradually decreases from the front side portion or the rear side portion toward the center portion,
The absorbent core is provided with an opening or recess extending in the front-rear direction on the center line in the width direction,
When the relative position of the absorbent core in the front-rear direction is 0% at the front end and 100% at the rear end, the front end of the opening or recess is located in the range of 15% to 30%, and the opening or the rear end of the recess is located in the range of 60% to 85%,
The center of the absorbent core in the front-rear direction is located at the rear intermediate portion,
The outer edge of the back intermediate portion of the absorbent core has an inclined line portion extending from the outer side to the inner side in the width direction from the rear side to the front side, and a virtual line extending from the inclined line portion corresponds to the absorbent core. an absorbent article that intersects the center line in the width direction of the elastic core on the front side of the front end of the opening or recess. 2. The absorbent article according to claim 1, wherein a front end of said opening or recess is located in said front intermediate portion. The outer edge of the front intermediate portion of the absorbent core has an inclined line portion extending from the outer side to the inner side in the width direction from the front side to the rear side. 3. The absorbent article according to claim 1, wherein the center line of the core in the width direction intersects on the rear side of the center of the absorbent core in the front-rear direction. The outer edge of the back side portion of the absorbent core has a straight portion extending in the front-rear direction, and the straight portion has a length of 20% or more and 45% or less of the length of the absorbent core in the front-rear direction,
4. The absorbent article according to any one of claims 1 to 3, wherein the rear end of the opening or recess overlaps the linear portion in the front-rear direction. The absorbent article according to any one of claims 1 to 4, wherein the absorbent core is provided with a recess as the opening or recess. The absorbent article according to any one of claims 1 to 5, wherein the absorbent core has substantially the same width in the front side portion and the rear side portion. 7. The absorbent core according to any one of claims 1 to 6, wherein the width of the front side portion and the width of the back side portion are 1.2 times or more and 1.4 times or less of the width of the central portion. absorbent article.

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