JP7352380B2 - disposable diapers - Google Patents

Description

The present invention relates to a disposable diaper, and particularly to a disposable diaper that can be suitably used in combination with a urine pad.

Conventionally, a method is known in which a disposable diaper is used by arranging an auxiliary urine pad on the skin side. According to this method of use, the urine pad first receives the urine etc. excreted by the wearer, so it is necessary to replace only the urine pad as appropriate and continue using the disposable diaper attached to the outside. This makes it possible to reduce the total usage cost of the absorbent article. Moreover, by replacing only the urine pad, a caregiver or the like can perform the replacement work more easily than when replacing a disposable diaper that is attached to the outside of the urine pad.

As an absorbent article suitable for use in conjunction with an auxiliary urine pad, for example, Patent Document 1 discloses a first flap provided on the skin side of an absorbent body so as to extend in the front-rear direction, and a first flap in the width direction of the first flap. Patent Document 2 discloses an absorbent article having a second flap provided so as to extend outward in the front-rear direction, and Patent Document 2 discloses an absorbent article main body having a sheet-like leak preventer and an absorbent body, and an absorbent article body having a sheet-like leak preventer and an absorbent body. An absorbent article having an article body and a connecting structure coupled at a front end and a rear end, the connecting structure comprising a pair of left and right band-shaped supports, and a pair of left and right band-shaped supports having left and right edges, respectively. An absorbent article is disclosed that has a connecting sheet that connects the absorbent articles.

Japanese Patent Application Publication No. 2014-124509 International Publication No. 2014/057571

As explained above, various absorbent articles suitable for use with supplementary urinary pads have been known, but some urinary pads are known to have wing parts on both sides in the width direction. It is being However, the absorbent articles disclosed in Patent Documents 1 and 2 cannot be said to be suitable for use together with urine pads having such wing portions.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a disposable diaper suitable for supplementary use with a urine pad having wing portions.

The disposable diaper of the present invention that can solve the above problems includes an exterior member having a front torso, a rear torso, and a crotch portion located between these, and provided on the skin side of the exterior member, A disposable diaper comprising an absorbent body and an absorbent body having a leak-proof sheet; the absorbent body comprises an absorbent core and a covering sheet provided to cover the skin side and the non-skin side of the absorbent core. The leak-proof sheet has a central portion in the width direction provided on the non-skin side of the absorbent body, and both side portions in the width direction are formed so as to be able to stand up along the side edges in the width direction of the absorbent body; The front end and the rear end of the body are joined to the leak-proof sheet, and the middle part between the front end and the rear end is not joined to the leak-proof sheet, or the center part in the width direction is A front presser sheet that covers the front edge of the absorbent core and is joined to the absorbent body and exterior member, and the absorbent core It is characterized in that it is provided with a rear pressing sheet that covers the rear edge of the absorbent body and is joined to the absorbent body and the exterior member.

The disposable diaper of the present invention, configured as described above, can be suitably used by attaching a urine pad having wing portions to an absorbent body. In other words, on the non-skin side of the absorbent body, both sides in the width direction of the middle part in the front-rear direction are not joined to the leak-proof sheet. When the urine pad is placed on the absorbent body, the wing portions of the urine pad are sandwiched between the both sides of the intermediate portion of the absorbent body and the leak-proof sheet, so that the urine pad can be stably attached to the absorbent body. In addition, by providing a front presser sheet and a rear presser sheet to cover the front and rear ends of the absorbent body, the front and rear ends of the absorbent core are pressed from the skin side, absorbing the urine pad with wing parts. When attached to the body, the absorbent body can be prevented from lifting off from the leak-proof sheet or exterior member. Therefore, when a urine pad having wing portions is used in combination, the urine pad can be stably set in the wearer's crotch region.

The covering sheet is preferably provided so as to cover the absorbent core from the skin side to the non-skin side, and is folded back toward the non-skin side of the absorbent core along both side edges of the absorbent core. If the absorbent body is formed in this way, the side edges of the absorbent body in the width direction will almost match the side edges of the absorbent core in the width direction, and when attaching the urine pad to the absorbent body, the wing part of the urine pad will be attached to the absorbent core. The absorbent core can be easily folded along the side edges in the width direction.

It is preferable that the upright base, which is the starting point from which both sides of the leakproof sheet stand up, is located outward in the width direction from the side edges of the absorber in the width direction by 5 mm or more. If both sides of the leak-proof sheet are formed in this way, when attaching a urine pad with wing parts to an absorbent body, the wing parts of the urine pad are passed between the absorbent body and both sides of the leak-proof sheet, and then the urine pad is attached to the absorbent body. This makes it easy to attach it to the non-skin side of the body.

It is preferable that both sides of the leak-proof sheet are formed to be able to stand up while tilting inward in the width direction, and that the both sides of the leak-proof sheet are provided so as not to overlap with the absorbent body in a laid down state. If both sides of the leak-proof sheet are formed in this way, the both sides of the leak-proof sheet will not get in the way when attaching a urine pad with wing parts to the absorbent body, and the wing parts can be attached to the non-skin surface of the absorbent body. Easy to attach to the side.

A core back adhesive part is provided on the non-skin side of the absorbent core, the core back adhesive part joins the absorbent core and the covering sheet, and the core back adhesive part is provided from the front end to the rear end. It is preferable that the By providing the adhesive on the back of the core in this way, rigidity is imparted from the front end to the rear end of the absorbent body, making it difficult for the absorbent body to buckle when attaching a urine pad with wings to the absorbent body. This makes it easier to attach the absorber of the wing portion to the non-skin side.

It is also preferable that the core back adhesive portions are provided on one side and the other side in the width direction of the absorbent core, at least in the middle portion. By providing the core back surface adhesive portion in this manner, the rigidity of the portion of the absorbent body that is contacted by the wing portion on the non-skin surface side is increased, and the work of attaching the wing portion to the non-skin surface side of the absorbent body is facilitated.

It is preferable that both side edges of the absorbent core in the width direction are formed in a straight line. If the absorbent core is formed in this way, when attaching a urine pad having wing portions to an absorbent body, it becomes easy to bend the wing portions straight along both side edges of the absorbent core. Therefore, the urine pad can be stably attached to the absorbent body, and the urine pad attached to the absorbent body is less likely to be twisted or distorted.

The front presser sheet and the rear presser sheet are bonded to the absorbent main body and the exterior member with an adhesive, and the amount of adhesive applied per unit area of the front side rearward edge of the absorbent main body is determined by the absorbent property. The amount of adhesive applied per unit area of the front part of the absorbent body is larger than the amount of adhesive applied per unit area of the front part of the absorbent body than the front edge of the absorbent body. It is preferable that the amount of adhesive applied per unit area of the rear portion is greater than that of the rear edge. Thereby, the front end and the rear end of the absorbent main body are firmly joined by the front pressing sheet and the rear pressing sheet, and the absorbent main body can be stably attached to the exterior member. Furthermore, the flexibility and breathability of the absorbent main body of the exterior member can be improved in a portion in front of the front edge and in a portion behind the rear edge.

The length of the front part of the front presser sheet from the front edge of the absorbent body in the front-rear direction is longer than the length of the rear part of the absorbent body from the front edge of the absorbent body in the front-rear direction. It is preferable that the length in the front-rear direction of the portion behind the rear edge is longer than the length in the front-rear direction of the portion in front of the rear edge of the absorbent main body. By providing the front presser sheet and the rear presser sheet in this way, the area of the exposed part of the absorbent body on the skin side is secured, while the front presser sheet and rear presser sheet can stably cover the absorbent body. Can be attached to a member.

The disposable diaper of the present invention can be suitably applied to a so-called pants-type disposable diaper. In this case, the exterior member is formed in the shape of a pant having a waist opening and a pair of leg openings, and the exterior member includes a pair of leg openings extending along the front edge of the leg openings and extending widthwise across the absorbent body. A front leg elastic member and a rear leg elastic member extending along the rear edge of the leg opening and across the absorbent body in the width direction are provided, and the front leg elastic member and the rear leg It is preferable that the elastic member is provided intermittently at a portion overlapping with the absorber. If the exterior member is configured in this way, the absorbent body will be less likely to be distorted by the contractile force of the leg elastic members, and the fit of the absorbent body between the wearer's crotches will be improved. Moreover, it becomes easier to stably attach the urine pad having the wing portion to the absorbent body.

When using the disposable diaper of the present invention with a urine pad having wing parts, the urine pad is placed on the skin side of the absorbent body, and the wing parts are placed between both sides of the middle part of the absorbent body and the leak-proof sheet. By sandwiching the urine pad, the urine pad can be stably attached to the absorbent body. In addition, by providing a front presser sheet and a rear presser sheet to cover the front and rear ends of the absorbent body, the front and rear ends of the absorbent core are pressed from the skin side, absorbing the urine pad with wing parts. When attached to the body, the absorbent body can be prevented from lifting off from the leak-proof sheet or exterior member. Therefore, when a urine pad having wing portions is used in combination, the urine pad can be stably set in the wearer's crotch region.

1 represents an example of the disposable diaper of the present invention, and represents a perspective view of a disposable pants-type diaper. FIG. 2 is a plan view of the disposable diaper shown in FIG. 1 in a state where the front body part and the rear body part are unjoined and unfolded, as seen from the skin side. An example of a sectional view taken along line III-III of the disposable diaper shown in FIG. 2 is shown. 3 is a cross-sectional view taken along line IV-IV of the disposable diaper shown in FIG. 2. FIG. 3 is a plan view of the absorbent body included in the disposable diaper shown in FIG. 2, viewed from the skin side. FIG. Another example of a plan view of the absorbent body viewed from the skin side is shown. 1 represents a configuration example of a urine pad having a wing portion used in combination with the disposable diaper of the present invention, and represents a plan view of the urine pad seen from the skin side. FIG.

The disposable diaper of the present invention can be suitably used in combination with a urine pad as an auxiliary. Specifically, a urine pad having wing portions on both sides in the width direction is placed on the skin side of the disposable diaper. It can be suitably used by placing the A urine pad having a wing portion is configured to have a main body portion on which an absorbent body is arranged, and a wing portion extending outward in the width direction from the main body portion, and the non-skin side of the wing portion usually includes: A fastening means such as an adhesive part or a hook-and-loop fastener is provided. The disposable diaper of the present invention is configured such that when a urine pad having such wing portions is placed on the skin side, the wing portions can be wrapped around and attached to the absorbent body of the disposable diaper. Therefore, according to the disposable diaper of the present invention, the auxiliary urine pad can be stably placed on the skin side, making it difficult for the urine pad to shift relative to the disposable diaper. Hereinafter, the disposable diaper of the present invention will be explained with reference to the drawings. Note that the present invention is not limited to the embodiments shown in the drawings.

1 to 4 show a pants-type disposable diaper as an example of the disposable diaper of the present invention. FIG. 1 is a perspective view of the disposable diaper, and FIG. 2 is a view from the skin side of the disposable diaper shown in FIG. 1 in a state where the front trunk and rear trunk are disjointed and unfolded into a flat surface. FIG. 3 shows an example of a III-III cross-sectional view of the disposable diaper shown in FIG. 2, and FIG. 4 shows an IV-IV cross-sectional view of the disposable diaper shown in FIG. In the drawings, 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.

The disposable diaper 1 has an exterior member 2 composed of a front trunk P, a rear trunk Q, and a crotch R located between them. In the disposable diaper 1 shown in FIG. 1, the exterior member 2 has a waist opening 3 and a pair of leg openings 4, and is formed in the shape of pants. The waist opening 3 is an opening for passing the wearer's torso, and the leg opening 4 is an opening for passing the wearer's legs.

In the exterior member 2, the front torso P corresponds to the part that touches the wearer's ventral side when wearing the diaper, and the rear torso Q corresponds to the part that touches the wearer's back when wearing the diaper. corresponds to The crotch portion R is located between the front torso P and the rear torso Q, and corresponds to the portion that touches the wearer's crotch. The crotch portion R is a portion located in the middle of dividing the exterior member 2 into three in the front-rear direction, and is not joined to each other on both sides in the width direction x when formed into a pants shape. When the disposable diaper is a pants-type diaper, the exterior member 2 is formed into a pants shape by, for example, joining the front trunk P and the rear trunk Q at side joints 14 at both ends in the width direction x. .

In the disposable diaper 1, the front-back direction y means the direction from the front trunk P to the rear trunk Q, and corresponds to the front-back direction of the wearer's crotch when wearing the diaper. The width direction x corresponds to the left-right direction of the wearer when wearing the diaper. The skin side of a disposable diaper refers to the side facing the wearer's skin when the diaper is worn. The non-skin side of a disposable diaper refers to the side facing away from the wearer when the diaper is worn.

The exterior member 2 may be composed of only one layer, or may be composed of multiple layers. Preferably, the exterior member 2 has an inner sheet 5 disposed on the skin side and an outer sheet 6 disposed on the non-skin side. The inner sheet 5 and the outer sheet 6 may be liquid permeable or liquid impermeable. It is preferable that the inner sheet 5 and the outer sheet 6 are moisture permeable, so that the feeling of wearing the exterior member 2 can be improved.

An absorbent main body 7 is provided on the skin side of the exterior member 2. The absorbent main body 7 may be provided at least at the crotch portion R of the exterior member 2, and may further extend to the front trunk P and/or the rear trunk Q. The absorbent main body 7 may be joined to the skin side of the exterior member 2 by a known joining means such as an adhesive, thermal welding, or ultrasonic welding.

The absorbent main body 7 has an absorbent body 8 and a leak-proof sheet 12. The leak-proof sheet 12 is provided on the non-skin side of the absorbent body 8 , extends outward in the width direction x from the side edge of the absorbent body 8 in the width direction x, and extends outward in the width direction x from the side edge of the absorbent body 8 in the width direction x. It is provided so that it can stand up along the edge. That is, when the leak-proof sheet 12 is divided into both side parts 12L in the width direction x and a central part 12C between them as shown in FIGS. 5 and 6, the central part 12C is provided on the non-skin side of the absorbent body 8. , both side portions 12L are formed so as to be able to stand up along the side edges of the absorbent body 8 in the width direction x. The absorbent body 8 absorbs urine etc. excreted by the wearer, and the leak-proof sheet 12 prevents the urine etc. absorbed by the absorbent body 8 from leaking to the outside. Specifically, the leak-proof sheet 12 can prevent urine and the like from migrating from the absorbent body 8 to the exterior member 2 by the central portion 12C, and can prevent urine and the like from leaking sideways by the side portions 12L.

In order for both sides 12L of the leak-proof sheet 12 to be formed to be able to stand up, elastic members extending in the front-rear direction y are attached to both sides 12L of the leak-proof sheet 12, or a stand-up device is attached to both sides 12L of the leak-proof sheet 12. What is necessary is to attach a seat and attach an elastic member extending in the front-rear direction y to the stand-up seat. In the drawing, elastic members 13 for standing up are attached to both sides 12L of the leak-proof sheet 12.

It is preferable that both sides 12L of the leak-proof sheet 12 are tilted inward in the width direction x so that they can stand up; therefore, the both sides 12L of the leak-proof sheet 12 are folded inward in the width direction x. It is preferable that both ends in the front-rear direction y be joined to the skin side of the absorber 8 or to the leak-proof sheet 12 itself. In addition, it is preferable that the intermediate part between both ends of both side parts 12L of the leak-proof sheet 12 in the front-rear direction y is not joined to the skin side of the absorber 8 or to the leak-proof sheet 12 itself.

The leak-proof sheet 12 may be a nonwoven fabric made of hydrophobic fibers such as polyolefin (e.g., polypropylene, polyethylene), polyester (e.g., PET), polyamide (e.g., nylon), woven fabric, knitted fabric, plastic film, or the like. can be used. The leak-proof sheet 12 may be composed of a laminate of two or more sheets, and for example, a laminate of a nonwoven fabric and a plastic film may be used.

The absorbent body 8 has an absorbent core 9 and a covering sheet 10. The absorbent core 9 is made of an absorbent material and stores urine etc. excreted by the wearer. As the absorbent material, hydrophilic fibers and water absorbent resins can be used. Hydrophilic fibers include natural fibers such as pulp fibers; recycled fibers such as rayon fibers; semi-synthetic fibers such as acetate fibers; synthetic fibers such as polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as PET, and polyamide fibers such as nylon. Examples include fibers that have been treated to be hydrophilic with a surfactant or the like. Examples of the water-absorbing resin include polyacrylic acid-based, polyaspartic acid-based, cellulose-based, starch/acrylonitrile-based, and other water-absorbing resins.

From the viewpoint of improving shape retention, the absorbent core 9 preferably contains at least hydrophilic fibers, and more preferably contains pulp fibers. As the absorbent core 9, it is preferable to use an aggregate of hydrophilic fibers. The absorbent core 9 also preferably contains hydrophilic fibers and a water-absorbing resin in order to increase absorption capacity. In this case, as the absorbent core 9, it is preferable to use, for example, an aggregate of hydrophilic fibers mixed with or sprinkled with a water absorbent resin.

The shape (planar shape) of the absorbent core 9 is not particularly limited. Examples of the shape of the absorbent core 9 include a substantially rectangular shape, an hourglass shape, a gourd shape, and a battledore shape. The absorbent core 9 may be formed by laminating a plurality of layers. The absorbent core 9 is provided at least at the crotch portion R of the exterior member 2, and may be further provided extending to the front trunk P and/or the rear trunk Q.

The covering sheet 10 is provided to cover the skin side and the non-skin side of the absorbent core 9. The covering sheet 10 can maintain the absorbent core 9 in a predetermined shape, prevent the absorbent material forming the absorbent core 9 from falling off, and prevent the absorbent material from coming into direct contact with the wearer's skin. . It is preferable that the covering sheet 10 is provided so as to cover the entire skin side and non-skin side of the absorbent core 9.

The covering sheet 10 may be composed of one sheet member, or may be composed of two or more sheet members. FIG. 3 shows two examples of different configurations of the covering sheet 10 as cross-sectional views taken along III-III of the disposable diaper shown in FIG. 2. In FIG. 3A, the covering sheet 10 is composed of one sheet member, and is provided so as to cover the absorbent core 9 from the skin side to the non-skin side. Specifically, the covering sheet 10 extends over the entire width direction x of the absorbent core 9 on the skin side of the absorbent core 9, and also extends along both side edges of the absorbent core 9 in the width direction x. The cover sheet 10 is folded back toward the non-skin side of the core 9, and both ends of the covering sheet 10 in the width direction x are located on the non-skin side of the absorbent core 9. In this case, it is preferable that both ends of the covering sheet 10 in the width direction x are overlapped with each other on the non-skin surface side of the absorbent core 9. Although not shown in the drawings, the covering sheet 10 may be provided to cover the absorbent core 9 from the non-skin side to the skin side. In this case, the covering sheet 10 extends over the entire width direction x of the absorbent core 9 on the non-skin side of the absorbent core 9, and also extends along both side edges of the absorbent core 9 in the width direction x. The cover sheet 10 is folded back toward the skin side of the core 9 and provided so that both ends of the covering sheet 10 in the width direction x are located on the skin side of the absorbent core 9 . In this case, it is preferable that both ends of the covering sheet 10 in the width direction x are overlapped with each other on the skin side of the absorbent core 9.

When the covering sheet 10 is composed of two or more sheet members, the covering sheet 10 includes an upper covering sheet 10A disposed on the skin side of the absorbent core 9, as shown in FIG. 3(b), It may also be composed of a lower covering sheet 10B disposed on the non-skin surface side of the absorbent core 9. In this case, the upper covering sheet 10A is folded back toward the non-skin side of the absorbent core 9 along both side edges of the absorbent core 9 in the width direction x, and both ends of the upper covering sheet 10A in the width direction It is preferable to provide it so that it may be located on the non-skin surface side of 9. Alternatively, the lower covering sheet 10B is folded back toward the skin side of the absorbent core 9 along both side edges of the absorbent core 9 in the width direction x, and both ends of the lower covering sheet 10B in the width direction It may be provided so as to be located on the skin surface side of 9.

It is preferable that at least a part of the covering sheet 10 located on the skin side of the absorbent core 9 is liquid permeable, and it is more preferable that the entire covering sheet 10 is liquid permeable. Thereby, urine etc. excreted by the wearer can pass through the covering sheet 10, and the urine etc. can be suitably absorbed by the absorbent core 9. The covering sheet 10 located on the non-skin surface side of the absorbent core 9 may be liquid-permeable or liquid-impermeable, but it is preferable that at least a portion thereof is liquid-permeable, and all of the covering sheet 10 is liquid-permeable. More preferably, it is liquid permeable. As will be described later, since a part of the non-skin side of the absorbent body 8 is not bonded to the leak-proof sheet 12, at least a part of the covering sheet 10 constituting the non-skin side of the absorbent body 8 is If it is liquid permeable, urine etc. can be absorbed even from the non-skin side of the absorbent body 8.

The covering sheet 10 may be a paper sheet such as tissue paper or thin paper; a nonwoven fabric made of hydrophilic fibers such as cellulose, rayon, or cotton; polyolefin (e.g., polypropylene, polyethylene), polyester (e.g., PET), polyamide (e.g. A nonwoven fabric made of hydrophobic fibers such as , nylon), the surface of which has been made hydrophilic with a surfactant, etc. can be used. Further, as the covering sheet 10, a woven fabric, a knitted fabric, a perforated plastic film, etc. may be used. A part of the covering sheet 10 may be made of a sheet member that can be used as the leak-proof sheet 12, or may be subjected to water-repellent treatment.

The non-skin surface side of the absorbent body 8 is partially joined to the leak-proof sheet 12. In FIG. 3, the joints between the absorber 8 and the leak-proof sheet 12 and the joints between the leak-proof sheet 12 and the exterior member 2 are indicated by cross marks. Further, FIGS. 5 and 6 show plan views of the absorbent body 7 viewed from the skin side, and the joint area between the absorbent body 8 and the leak-proof sheet 12 is shown by cross hatching. .

As shown in FIG. 5, when the absorber 8 is divided in the front-rear direction y into a front end 8F, a rear end 8B, and an intermediate part 8M between them, the front end 8F and the rear end 8B is joined to the leak-proof sheet 12, and the intermediate portion 8M is configured such that the central part in the width direction x is joined to the leak-proof sheet 12, and both side parts in the width direction x are not joined to the leak-proof sheet 12. Alternatively, as shown in FIG. 6, the intermediate portion 8M may not be joined to the leak-proof sheet 12. In other words, both sides of the intermediate portion 8M on the non-skin surface side of the absorber 8 in the width direction x are not joined to the leak-proof sheet 12. By joining the absorbent body 8 to the leak-proof sheet 12 in this way, when a urine pad having wing portions is used together, the wing portions of the urine pad can be connected to both sides of the intermediate portion 8M of the absorbent body 8 and the leak-proof sheet 12. It becomes possible to stably attach the urine pad to the absorbent body 8 by sandwiching it between the two.

FIG. 7 shows an example of the configuration of a urine pad having wing portions. The urine pad 51 has a main body portion 52 on which an absorbent body 56 is disposed, and wing portions 53 extending outward from the main body portion 52 in the width direction x. In the main body portion 52, an absorbent body 56 is disposed between the top sheet 54 and the back sheet 55, and a mount 57 may be further disposed between the absorbent body 56 and the back sheet 53. The mount 57 enhances the shape retention of the main body portion 52. The wing portion 53 can be formed, for example, by the top sheet 54 and the back sheet 55 extending outward in the width direction x from the main body portion 52. It is preferable that a fastening means 58 such as an adhesive part or a hook-and-loop fastener is provided on the non-skin side of the wing part 53.

In the absorbent body 8, the lengths in the front-rear direction y of the front end 8F, the rear end 8B, and the middle part 8M are not particularly limited, but the middle part 8M makes it easy to attach a urine pad having a wing part. The length in the front-back direction y is preferably 30% or more of the length of the absorber 8 in the front-back direction y, more preferably 40% or more, and even more preferably 50% or more. On the other hand, from the point of view of securing a joint area between the front end 8F and the rear end 8B of the absorbent body 8 to the leak proof sheet 12, the length of the intermediate portion 8M in the front-back direction y is The length is preferably 90% or less, more preferably 80% or less. In addition, it is preferable that an absorbent core 9 is present at the front end 8F and rear end 8B of the absorbent core 8 that are joined to the leak-proof sheet 12, so that the front and rear ends of the absorbent core 9 are prevented. It is fixed to the leakage sheet 12, and the absorber 8 is stably attached to the leakage prevention sheet 12.

Of the intermediate portion 8M of the absorbent body 8, the length in the width direction x of the central portion in the width direction x that can be joined to the leak-proof sheet 12 is preferably 50% or less of the length in the width direction It is more preferably 33% or less, and even more preferably 25% or less. In other words, the middle portion 8M of the absorbent body 8 has a length in the width direction x of both sides of the width direction The length in the width direction x) is preferably 50% or more of the length in the width direction x of the absorbent body 8, more preferably 67% or more, and even more preferably 75% or more. Thereby, in the intermediate portion 8M of the absorber 8, both side portions in the width direction x that are not joined to the leak-proof sheet 12 can be formed with sufficient width. Note that the central portion of the absorbent body 8 in the width direction x is defined as a portion that includes the center line of the absorbent body 8 in the width direction x. The lower limit of the length in the width direction x of the central portion of the absorbent body 8 in the width direction x is not particularly limited, and may be 1% or more, 3% or more, or 5% or more of the length in the width direction x of the absorbent body 8. It's okay. When the central part in the width direction x of the middle part 8M of the absorber 8 is joined to the leak-proof sheet 12, the central part may be joined to the leak-proof sheet 12 continuously in the front-rear direction y, or intermittently. It may be joined to the leak-proof sheet 12.

As shown in FIG. 6, the intermediate portion 8M of the absorber 8 is preferably not joined to the leak-proof sheet 12. That is, it is preferable that the absorber 8 is joined to the leak-proof sheet 12 only at the front end 8F and the rear end 8B. Thereby, even if the wing portion of the urine pad used in combination is formed to have a long length in the width direction x, it becomes easy to wrap the wing portion around the absorbent body 8 without bending the tip end of the wing portion. Note that the wing portion of the urine pad used in combination may be wrapped around the entire width direction x of the non-skin side of the absorbent body 8, or may be wrapped around only a part of the width direction x. good.

It is preferable that the front end 8F and the rear end 8B of the absorbent body 8 are joined to the leak-proof sheet 12 over a wide range in the width direction x, so that the absorbent body 8 can be stably installed on the leak-proof sheet 12. can do. Specifically, the joining width of the front end 8F and rear end 8B of the absorber 8 to the leak-proof sheet 12, that is, the joint width of the front end 8F or the rear end 8B to the leak-proof sheet 12. The length from one end to the other end in the width direction x is preferably 50% or more, more preferably 67% or more, and even more preferably 75% or more of the length of the absorber 8 in the width direction x.

The absorber 8 may be joined to the leak-proof sheet 12 by a known joining means such as an adhesive, thermal welding, or ultrasonic welding. In addition, it is preferable that the absorbent body 8 is joined to the leak-proof sheet 12 with an adhesive, so that the absorbent body 8 and the leak-proof sheet 12 can be easily joined together. The adhesive may be applied all over the predetermined area, or may be applied in the form of a net, lines, or scattered dots. As a method for applying the adhesive, for example, a coater method, a bead method, a curtain spray method, an omega coating method, a spiral coating method, a pattern coating method, etc. can be used.

In order to facilitate attachment of the urine pad having wing portions, the covering sheet 10 is provided so as to cover the absorbent core 9 from the skin side to the non-skin side, as shown in FIG. It is preferable that the absorbent core 9 is folded back along both side edges of the absorbent core 9 toward the non-skin side. For example, when the covering sheet 10 is composed of one sheet, as shown in FIG. 3(a), the covering sheet 10 is provided so as to cover the absorbent core 9 from the skin side to the non-skin side. It is preferable that the cover sheet 10 is folded back toward the non-skin side of the absorbent core 9 along both side edges of the absorbent core 9, and both ends of the covering sheet 10 in the width direction x are overlapped with each other on the non-skin side of the absorbent core 9. When the covering sheet 10 is composed of an upper covering sheet 10A and a lower covering sheet 10B as shown in FIG. 3(b), the upper covering sheet 10A covers the absorbent core 9 from the skin side to the non-skin side. In the width direction It is preferable that both ends are joined to the lower covering sheet 10B. If the absorbent body 8 is formed in this way, the side edges of the absorbent body 8 in the width direction x will substantially match the side edges of the absorbent core 9 in the width direction x, and when attaching the urine pad to the absorbent body 8, The wing portion of the urine pad can be easily bent along the side edge of the absorbent core 9 in the width direction x. Moreover, the feel of the skin side of the absorber 8 is also good.

The covering sheet 10 is composed of an upper covering sheet 10A and a lower covering sheet 10B, and it is also preferable that the basis weight of the lower covering sheet 10B is larger than the basis weight of the upper covering sheet 10A. In urine pads having wing portions, fixing means such as adhesive portions or hook-and-loop fasteners are usually provided on the non-skin side of the wing portions, but when attaching such a urine pad having wing portions to the absorbent body 8, The fastening means of the wing portion can be easily fastened to the lower covering sheet 10B. Therefore, by making the basis weight of the lower covering sheet 10B larger than the basis weight of the upper covering sheet 10A, damage to the covering sheet 10 due to attachment and detachment of the attachment means of the wing portions can be easily suppressed.

It is preferable that both side edges of the absorbent core 9 in the width direction x are formed in a straight line. For example, the absorbent core 9 is preferably formed into a rectangular shape, a rectangular shape with rounded corners, an oval shape, or the like. If the absorbent core 9 is formed in this way, when attaching the urine pad having the wing portions to the absorbent body 8, it becomes easy to bend the wing portions straight along both side edges of the absorbent core 9. Therefore, the urine pad can be stably attached to the absorbent body 8, and the urine pad attached to the absorbent body 8 is less likely to be twisted or distorted.

As shown in FIGS. 2 and 4, it is preferable that a front pressing sheet 15 is provided at the front end of the absorbent main body 7, and a rear pressing sheet 16 is provided at the rear end of the absorbent main body 7. . Specifically, the front pressing sheet 15 is provided to cover the front edge of the absorbent core 9 and is joined to the absorbent main body 7 and the exterior member 2, and the rear pressing sheet 16 is provided to cover the front edge of the absorbent core 9. It is preferable to cover the edges and to be connected to the absorbent main body 7 and the exterior member 2. As a result, the front and rear ends of the absorbent core 9 are pressed from the skin side by the front pressing sheet 15 and the rear pressing sheet 16, and when the urine pad having the wing portion is attached to the absorbent body 8, the absorbent body 8 is Lifting up from the leak-proof sheet 12 and the exterior member 2 can be suppressed. Furthermore, even if the front and rear ends of the absorbent body 8 come into contact with the wearer's skin and a shearing force is applied to the front and rear ends of the absorbent body 8, the front and rear pressing sheets 15 and 16 keep the absorbent body It is possible to prevent the front and rear ends of the leak proof sheet 12 from peeling off. Therefore, when a urine pad having wing portions is used in combination, the urine pad can be stably set in the wearer's crotch region.

It is preferable that the front pressing sheet 15 is provided so as to cover the front edge of the absorbent core 9 and the front edge of the leak-proof sheet 12. Similarly, the rear pressing sheet 16 is preferably provided so as to cover the rear edge of the absorbent core 9 and the rear edge of the leak-proof sheet 12. As a result, the front and rear ends of the leak-proof sheet 12 are pressed from the skin side by the front-side presser sheet 15 and the rear-side presser sheet 16, making it possible to prevent leakage of urine, etc. from the front and rear ends of the leak-proof sheet 12. .

It is preferable that the front pressing sheet 15 covers the front edge of the absorbent core 9, extends forward from the front edge of the absorbent core 9, and is provided astride the absorbent main body 7 and the exterior member 2. The rear pressing sheet 16 covers the rear edge of the absorbent core 9, extends rearward from the rear edge of the absorbent core 9, and is provided astride the absorbent main body 7 and the exterior member 2. is preferred. Thereby, the absorbent main body 7 can be stably attached to the exterior member 2 by the front pressing sheet 15 and the rear pressing sheet 16. Furthermore, the front and rear ends of the absorbent body 7 do not turn over, making it possible to improve the feeling of wearing the disposable diaper.

The front pressing sheet 15 and the rear pressing sheet 16 are preferably provided across the absorbent body 8 in the width direction x, and more preferably are provided across the absorbent body 7 in the width direction x. In particular, the front pressing sheet 15 is provided over the entire front trunk portion P of the exterior member 2 in the width direction x, and the rear pressing sheet 16 is provided over the entire rear trunk portion Q of the exterior member 2 in the width direction x. is preferable, and thereby the absorbent main body 7 can be stably attached to the exterior member 2 by the front pressing sheet 15 and the rear pressing sheet 16.

The front pressing sheet 15 is preferably provided on the front trunk P and/or the crotch R, and more preferably only on the front trunk P. In this case, the absorbent core 9 extends from the crotch R to the front trunk P of the exterior member 2. The rear pressing sheet 16 is preferably provided on the rear trunk Q and/or the crotch R, and preferably only on the rear trunk Q. In this case, the absorbent core 9 extends from the crotch portion R of the exterior member 2 to the rear trunk portion Q. Thereby, the area of the portion of the absorber 8 exposed to the skin side can be increased, and the absorbent performance of the disposable diaper 1 can be improved. In addition, in order to secure the bonding area of the front presser sheet 15 and the rear presser sheet 16 to the exterior member 2, the front edge of the absorbent body 7 is located closer to the center line of the front trunk P of the exterior member 2 in the longitudinal direction y. It is preferable to locate it on the rear side, and it is preferable that the rear side edge of the absorbent main body 7 is located on the front side of the median line of the rear body part Q of the exterior member 2 in the front-rear direction y.

It is preferable that the length of the front pressing sheet 15 in the front-rear direction y of the portion in front of the front edge of the absorbent body 7 is longer than the length in the front-rear direction y of the portion behind the front edge of the absorbent body 7; It is preferable that the length of the side pressing sheet 16 in the front-rear direction y of a portion rearward from the rear edge of the absorbent body 7 is longer than the length in the front-rear direction y of a portion in front of the rear edge of the absorbent body 7 . By providing the front presser sheet 15 and the rear presser sheet 16 in this way, the area of the exposed portion of the absorbent body 8 on the skin side is ensured, and the front presser sheet 15 and the rear presser sheet 16 are used to secure the area of the absorbent body 8. 7 can be stably attached to the exterior member 2.

The front presser sheet 15 and the rear presser sheet 16 can be made of a sheet material that can be used for the cover sheet 10 and the leak-proof sheet 12, and are preferably made of nonwoven fabric. Thereby, the feel of the disposable diaper 1 can be improved at the locations where the front pressing sheet 15 and the rear pressing sheet 16 are provided.

It is preferable that the front pressing sheet 15 and the rear pressing sheet 16 are joined to the absorbent main body 7 and the exterior member 2 with an adhesive. It is preferable to use a hot melt adhesive as the adhesive. The front pressing sheet 15 and the rear pressing sheet 16 are preferably joined to the absorbent main body 7 and the exterior member 2 by a linear adhesive pattern. Thereby, the flexibility and breathability of the portion of the exterior member 2 where the front pressing sheet 15 and the rear pressing sheet 16 are provided are increased, and the feeling of wearing the disposable diaper 1 can be improved. In the linear adhesive pattern, the adhesive may be applied in a straight line, curved, or a combination thereof. When the adhesive is applied in a curved shape, it may be applied in a meandering shape or a spiral shape, for example. The meandering pattern includes, for example, a sinusoidal waveform, an Ω-like repeating pattern, and the like. A linear adhesive pattern can be formed by applying an adhesive by a coater method, a bead method, an omega coating method, a spiral coating method, a pattern coating method, or the like.

In the front pressing sheet 15, the amount of adhesive applied per unit area on the rear side of the front edge of the absorbent body 7 is larger than the amount of adhesive applied per unit area on the front side of the front edge of the absorbent body 7. Preferably, the rear presser sheet 16 has an adhesive coating amount per unit area of the portion in front of the rear edge of the absorbent body 7, such that the amount of adhesive applied per unit area of the portion behind the rear edge of the absorbent body 7 is It is preferable that the amount is greater than the amount of adhesive applied. Thereby, the front end and the rear end of the absorbent main body 7 are firmly joined by the front pressing sheet 15 and the rear pressing sheet 16, and the absorbent main body 7 can be stably attached to the exterior member 2. Furthermore, the flexibility and breathability of the absorbent main body 7 of the exterior member 2 can be improved in a portion in front of the front edge and in a portion behind the rear edge.

Preferably, the front end and the rear end of the exterior member 2 are folded back toward the skin surface. In particular, the exterior member 2 is composed of an inner sheet 5 and an outer sheet 6, and as shown in FIGS. 2 and 4, the outer sheet 6 is folded back toward the skin side along the front edge or the rear edge of the exterior member 2. It is preferable that In the case of a pants-type disposable diaper, it is preferable that the outer sheet 6 of the exterior member 2 is folded back along the edge of the waist opening 3 toward the skin side. Thereby, the strength of the front end and the rear end of the exterior member 2 can be increased, and the end faces of the front and rear edges of the exterior member 2 can be formed neatly.

When the exterior member 2 is configured as described above, it is preferable that the front edge of the front presser sheet 15 is covered by the front end of the exterior member 2 that is folded back toward the skin side. It is preferable that the outer sheet 6 is covered with an outer sheet 6 that is folded back toward the skin side along the front edge. The rear edge of the rear presser sheet 16 is preferably covered by the rear edge of the exterior member 2 that is folded back toward the skin side. Preferably, it is covered by a folded outer sheet 6. As a result, when the disposable diaper 1 is worn, the front edge of the front presser sheet 15 and the rear edge of the rear presser sheet 16 are prevented from being turned up, and the front presser sheet 15 and the rear presser sheet 16 are stabilized. It can be attached to the exterior member 2.

It is preferable that the leak-proof sheet 12 provided on the non-skin side of the absorber 8 be joined to the exterior member 2 over a wider range in the front-rear direction y. The non-skin surface side of the leak-proof sheet 12 is preferably joined to the exterior member 2 over a range of 70% or more of the length in the front-rear direction y of the leak-proof sheet 12, more preferably 80% or more, and 90% or more of the length in the front-rear direction y. % or more is more preferable.

The leak-proof sheet 12 is preferably joined to the exterior member 2 at a portion that overlaps both sides in the width direction x of the intermediate portion 8M of the absorber 8 (see FIG. 3). As a result, when attaching a urine pad having wing portions to the absorbent body 8, the wing portions of the urine pad can be easily sandwiched between both sides in the width direction x of the intermediate portion 8M of the absorbent body 8 and the leakage prevention sheet 12. This makes it easier to attach the urine pad to the absorbent body 8.

The leak-proof sheet 12 is preferably joined to the exterior member 2 at a portion outward in the width direction x from the side edge of the absorber 8 in the width direction x. Specifically, the leak-proof sheet 12 is located outward in the width direction x from the side edges of the absorbent body 8 in the width direction It is preferable to join the exterior member 2 at some portions. By joining the leak-proof sheet 12 to the exterior member 2 in this way, the upright bases from which the both sides 12L of the leak-proof sheet 12 rise can be moved in the width direction x from the side edges of the absorber 8 in the width direction x. They will be located at a distance to the outside. Therefore, when attaching a urine pad having wing portions to the absorbent body 8, the wing portions of the urine pad can be passed between the absorbent body 8 and both sides 12L of the leak-proof sheet 12, and attached to the non-skin side of the absorbent body 8. becomes easier. The distance between the upright bases of both sides 12L of the leak-proof sheet 12 and the side edges of the absorbent body 8 in the width direction x is preferably 5 mm or more, more preferably 10 mm or more, and even more preferably 15 mm or more. It becomes easy to attach the section to the lower side of the absorbent body 8. On the other hand, the distance between the upright bases of both sides 12L of the leak-proof sheet 12 and the side edges of the absorbent body 8 in the width direction x is preferably 60 mm or less, more preferably 50 mm or less, and even more preferably 30 mm or less. The length of the absorber 8 in the width direction x is not too narrow, making it easier to ensure the absorption capacity of the absorber 8.

Both sides 12L of the leak-proof sheet 12 are formed to be able to stand up while tilting inward in the width direction x, and the both sides 12L of the leak-proof sheet 12 are provided so as not to overlap with the absorbent body 8 in the laid down state. It is preferable. If the both sides 12L of the leak-proof sheet 12 are formed in this way, the both sides 12L of the leak-proof sheet 12 will not get in the way when attaching the urine pad having wing parts to the absorbent body 8, and the wing parts will be absorbed. It becomes easy to attach it to the non-skin side of the body 8. Furthermore, since the both side portions 12L of the leak-proof sheet 12 stand up while tilting inward in the width direction x, the effect of preventing lateral leakage of urine or the like is enhanced. In this case, it is preferable that both ends of both sides 12L of the leak-proof sheet 12 in the front-back direction y be joined to the leak-proof sheet 12 itself.

It is preferable that a core back adhesive part 11 is provided on the non-skin side of the absorbent core 9, and that the absorbent core 9 and the covering sheet 10 are joined by the core back adhesive part 11 (see FIG. 3). The core back adhesive portion 11 can be formed by providing an adhesive layer on the non-skin side of the absorbent core 9, thereby increasing the rigidity of the absorbent core 9 at the core back adhesive portion 11. .

The core back adhesive portion 11 is preferably provided from the front end 8F to the rear end 8B of the absorbent body 8. By providing the core back adhesive portion 11 in this manner, rigidity is imparted from the front end 8F to the rear end 8B of the absorbent body 8, and when attaching the urine pad having the wing portion to the absorbent body 8, the absorbent body 8 becomes difficult to wear out, and the work of attaching the absorber 8 to the non-skin surface side of the wing portion becomes easier.

The core back adhesive portions 11 are preferably provided on one side and the other side of the absorbent core 9 in the width direction x, at least in the intermediate portion 8M of the absorbent core 8. By providing the core back adhesive portion 11 in this manner, the rigidity of the portion of the absorbent body 8 that is contacted by the wing portion on the non-skin side increases, and the work of attaching the wing portion to the non-skin side of the absorbent body 8 is facilitated. Become. In addition, the core back surface adhesive part 11 on one side and the core back surface adhesive part 11 on the other side in the width direction x of the absorbent core 9 may be spaced apart from each other, or may be provided continuously. The length (total length) of the core back adhesive part 11 in the width direction x is preferably 30% or more, more preferably 35% or more, and 40% or more of the length of the absorbent core 9 in the width direction x. is even more preferable. Further, it is preferable that the core back adhesive part 11 is provided at least in part of both sides in the width direction x when the absorbent core 9 is divided into three equal parts in the width direction x, and is preferably provided in the center part in the width direction x. It's okay.

In the core backside adhesive portion 11, the adhesive may be applied over the entire surface, or may be applied in a net shape, a linear shape, or a scattered dot shape. Note that the adhesive is preferably applied in a net shape or a curved shape (for example, a meandering shape or a spiral shape) because it is easy to appropriately increase the rigidity of the absorbent core 9 at the core back surface adhesive part 11. As a method for applying such an adhesive, it is preferable that the core back adhesive portion 11 is formed by a curtain spray method, an omega coating method, a spiral coating method, a pattern coating method, or the like.

Preferably, the exterior member 2 is provided with a leg elastic member 17 along the edge of the leg opening 4 (see FIGS. 1 and 2). Particularly in the case of a pants-type disposable diaper, it is preferable that the leg elastic members 17 be provided on the exterior member 2 in this manner. In the drawing, the leg elastic members 17 include a front leg elastic member 17F provided along the front edge of the leg opening 4 and a rear leg elastic member 17F provided along the rear edge of the leg opening 4. It is composed of a member 17B. The front leg elastic member 17F and the rear leg elastic member 17B provide an elastic member over almost the entire circumference of the edge of the leg opening 4. The leg elastic members 17 form leg gathers around the wearer's legs, thereby preventing leakage of urine or the like from the crotch R. In the drawing, the front leg elastic member 17F and the rear leg elastic member 17B are provided apart from each other, but the front leg elastic member 17F and the rear leg elastic member 17B are in contact with each other or intersect with each other. It's okay.

It is preferable that the front leg elastic members 17F and the rear leg elastic members 17B are provided intermittently in the portions overlapping with the absorbent body 8. In addition, in other parts, it is preferable that the front leg elastic member 17F and the rear leg elastic member 17B are provided continuously. If the front leg elastic member 17F and the rear leg elastic member 17B are provided in this manner, the absorbent body 8 will be less likely to be distorted, and the fit of the absorbent body 8 between the wearer's crotch will be improved. Further, it becomes easier to stably attach the urine pad having the wing portion to the absorbent body 8. When the leg elastic members 17 are provided intermittently, the leg elastic members 17 may be adhesively fixed to the exterior member 2 and then cut with a cutter or the like. By doing so, the leg elastic members 17 can be easily provided intermittently during manufacturing, and the contractile force of the elastic members can be substantially reduced in the portions where the leg elastic members 17 are intermittently provided. can be lost.

It is preferable that the front body part P and the rear body part Q of the exterior member 2 are provided with a plurality of body part elastic members 18 extending in the width direction x. The torso elastic member 18 is provided between the waist opening 3 and the leg opening 4. The torso elastic member 18 improves the fit around the wearer's torso. Of the torso elastic members 18, an elastic member provided along the edge of the waist opening 3 may be provided as the waist elastic member 19, thereby forming waist gathers around the waist of the wearer. This prevents leakage of urine and other excreta from the back and abdomen. In FIGS. 1 and 2, the waist elastic members 19 are provided at narrower intervals in the front-rear direction y than the torso elastic members 18.

When the exterior member 2 is composed of an inner sheet 5 and an outer sheet 6 as shown in the drawings, the leg elastic members 17, torso elastic members 18, and waist elastic members 19 provided on the exterior member 2 are Preferably, it is arranged between the sheet 5 and the outer sheet 6. The waist elastic member 19 may be sandwiched between the outer sheets 6 folded back toward the inner sheet 5 at the edge of the waist opening 3 and bonded to the outer sheets 6.

As each elastic member provided in the disposable diaper 1, elastic stretchable materials used in normal disposable diapers, such as polyurethane thread, polyurethane film, and natural rubber, can be used. Each elastic member is preferably fixed to the diaper in a stretched state, and preferably fixed with an adhesive such as a hot melt adhesive. For example, a polyurethane thread with a fineness of 40 to 1,240 dtex is stretched at a magnification of 1.1 to 5.0 times and fixed. As the adhesive, it is preferable to use a rubber-based hot melt adhesive. Note that the magnification is 1.0 times in the non-expanded state.

In addition, when nonwoven fabrics are used as sheet materials for the leak-proof sheet 12, covering sheet 10, inner sheet 5, outer sheet 6, etc. described above, examples of nonwoven fabrics include spunbond nonwoven fabrics, air-through nonwoven fabrics, point bond nonwoven fabrics, melt-blown nonwoven fabrics, and SMS. It is preferable to use a non-woven fabric or the like, which allows a thin and strong sheet to be easily obtained.

The case where the disposable diaper of the present invention is applied to a pants-type diaper has been described above, but the disposable diaper of the present invention is provided with fastening tapes on both sides of the rear trunk in the width direction. It may be an open type (tape type) disposable diaper that is formed into a pants shape when worn. Further, the disposable diaper of the present invention can be used in combination with a urine pad that does not have wing portions, or can be used alone without being used in combination with a urine pad.

1: Disposable diaper 2: Exterior member 3: Waist opening 4: Leg opening 5: Inner sheet 6: Outer sheet 7: Absorbent body 8: Absorbent body, 8F: Front end, 8B: Back end, 8M : Middle part 9: Absorbent core 10: Covering sheet, 10A: Upper covering sheet, 10B: Lower covering sheet 11: Core back adhesive part 12: Leak proof sheet, 12C: Center part, 12L: Both sides 13: For standing up Elastic member 14: Side joint 15: Front presser sheet 16: Rear presser sheet 17: Leg elastic member, 17F: Front leg elastic member, 17B: Rear leg elastic member 18: Torso elastic member 19: Waist region Elastic member P: Front torso Q: Back torso R: Crotch

Claims (10)

an exterior member having a front body part, a rear body part, and a crotch part located therebetween;
A disposable diaper that is provided on the skin side of the exterior member and has an absorbent body having an absorbent body and a leak-proof sheet,
The absorbent body has an absorbent core and a covering sheet provided to cover the skin side and the non-skin side of the absorbent core,
The leak-proof sheet has a central portion in the width direction provided on the non-skin side of the absorbent body, and both side portions in the width direction are formed so as to be able to stand up along side edges in the width direction of the absorbent body,
The absorber has a front end and a rear end joined to the leak proof sheet, and an intermediate part between the front end and the rear end not joined to the leak proof sheet, A central part in the width direction is joined to the leak-proof sheet, and both sides in the width direction are not joined to the leak-proof sheet,
The leak-proof sheet is joined to the exterior member at a portion outward in the width direction from the side edges in the width direction of each of the front end, rear end, and intermediate portion of the absorbent body,
a front presser sheet that covers the front edge of the absorbent core and is joined to the absorbent body and the exterior member; and a rear presser sheet that covers the rear edge of the absorbent core and is joined to the absorbent body and the exterior member. A disposable diaper characterized by being provided with. The covering sheet is provided to cover the absorbent core from the skin side to the non-skin side, and is folded back to the non-skin side of the absorbent core along both side edges of the absorbent core. The disposable diaper according to item 1. The disposable diaper according to claim 1 or 2, wherein the standing base, which is the starting point from which both sides of the leak-proof sheet stand, is located at a distance of 5 mm or more outward in the width direction from the side edges in the width direction of the absorbent body. . Both sides of the leak-proof sheet are formed to be able to stand up while tilting inward in the width direction,
The disposable diaper according to any one of claims 1 to 3, wherein both sides of the leak-proof sheet are provided so as not to overlap the absorbent body in a laid-down state. A core back adhesive part is provided on the non-skin side of the absorbent core, and the absorbent core and the covering sheet are joined at the core back adhesive part,
The disposable diaper according to any one of claims 1 to 4, wherein the core back adhesive portion is provided from the front end to the rear end. A core back adhesive part is provided on the non-skin side of the absorbent core, and the absorbent core and the covering sheet are joined at the core back adhesive part,
6. The disposable diaper according to claim 1, wherein the core back adhesive portion is provided on one side and the other side in the width direction of the absorbent core, at least in the intermediate portion. The disposable diaper according to any one of claims 1 to 6, wherein the absorbent core has both side edges in the width direction formed in a straight line. The front pressing sheet and the rear pressing sheet are joined to the absorbent main body and the exterior member with an adhesive,
The front presser sheet has a larger amount of adhesive applied per unit area in a portion behind the front edge of the absorbent body than the amount of adhesive applied per unit area in a portion in front of the front edge of the absorbent body. ,
The amount of adhesive applied per unit area of the rear side pressing sheet on the front side of the rear edge of the absorbent body is the same as the amount of adhesive applied per unit area of the area on the rear side of the back side edge of the absorbent body. The disposable diaper according to any one of claims 1 to 7. The front pressing sheet has a length in the front-rear direction of a portion in front of the front edge of the absorbent body that is longer than a length in the front-rear direction of a portion behind the front edge of the absorbent body,
9. The rear pressing sheet has a length in the front-rear direction of a portion rearward from the rear edge of the absorbent body that is longer than a length in the front-rear direction of a portion in front of the rear edge of the absorbent body. The disposable diaper according to any one of the above. The exterior member is formed in the shape of pants having a waist opening and a pair of leg openings,
The exterior member includes a front leg elastic member extending along the front edge of the leg opening and extending across the absorbent body in the width direction, and a front leg elastic member extending along the rear edge of the leg opening. , a rear leg elastic member extending across the absorbent main body in the width direction,
The disposable diaper according to any one of claims 1 to 9, wherein the front leg elastic member and the rear leg elastic member are provided intermittently in a portion overlapping with the absorbent body.

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