JP7018475B2 - Disposable diapers - Google Patents

Description

The present invention relates to a pants-type disposable diaper.

Conventionally, disposable diapers formed in the shape of pants having a waist opening and a pair of leg openings are widely known (for example, Patent Documents 1 to 5).

Japanese Unexamined Patent Publication No. 8-280739 Japanese Unexamined Patent Publication No. 2004-049763 Japanese Unexamined Patent Publication No. 2004-298395 Japanese Unexamined Patent Publication No. 2014-180346 Japanese Unexamined Patent Publication No. 2017-063849

Disposable diapers formed in the shape of pants are often provided with leg elastic members along the edges of the leg openings, and the contractile force of the leg elastic members can improve the fit around the wearer's legs. can. On the other hand, disposable diapers are provided with an absorbent core for absorbing urine, etc., but when the contractile force of the leg elastic member reaches the absorbent core and the absorbent core is greatly distorted, the wearer of the absorbent core The fit to the crotch area may decrease, leading to leakage of urine and the like.

The present invention has been made in view of the above circumstances, and an object thereof is a disposable diaper in which a leg elastic member is provided along the edge of the leg opening, and the absorbent core is suppressed from being greatly distorted. The purpose is to provide a disposable diaper having an excellent fit to the crotch of the wearer.

The disposable diaper of the present invention that has been able to solve the above problems has an anterior torso, a posterior torso, and a crotch located between them, and the anterior torso and the posterior torso are joined. It is a disposable diaper formed in the shape of a pants having a waist opening and a pair of leg openings; at least on the crotch of the diaper, a top sheet and a back sheet and an absorption arranged between them. An absorptive body with a sex core is provided; the absorptive core has anterior, anterior middle, central, posterior intermediate and posterior portions from the anterior-posterior front, anterior and posterior. The sides are formed wider than the central part, and the anterior middle part and the posterior middle part are formed so as to gradually increase in width from the central part toward the front side or the rear side, respectively; on the outer surface side of the absorbent body. Is provided with an exterior member, which is located on the anterior torso, crotch and posterior torso; the exterior member is an anterior that crosses the crotch and extends along the anterior edge of the leg opening. A leg elastic member and a posterior leg elastic member that traverses the crotch and extends along the posterior edge of the leg opening are provided, and the anterior leg elastic member is the anterior and anterior side of the absorbent core. Overlapping the middle, the rear leg elastic member overlaps the posterior and posterior intermediate of the absorbent core; the exterior member has the width of the anterior, central and posterior intermediate of the absorbent core. It is characterized in that no elastic member is arranged outside in the direction.

In the disposable diaper of the present invention, since the absorbent core is formed as described above and the front leg elastic member and the posterior leg elastic member are provided, the front leg elastic member and the posterior leg elastic member are provided. It will be arranged so as to overlap the absorbent core along the outer edge in the width direction of the absorbent core. Therefore, the front leg elastic member and the rear leg elastic member tend to act so as to lift the entire absorbent core toward the crotch portion of the wearer. Further, since the front leg elastic member and the rear leg elastic member are not arranged outward in the width direction of the front middle portion, the center portion and the rear middle portion of the absorbent core, the outer edge in the width direction of the absorbent core is not arranged. And its vicinity are less likely to be distorted, and the flatness of the absorbent core is more likely to be maintained. Therefore, the absorbent core is lifted toward the wearer's crotch while maintaining flatness without being significantly distorted, and the fit of the absorbent core to the wearer's crotch can be improved.

In the front leg elastic member, at least a part of the portion overlapping the front side portion of the absorbent core and at least a part of the portion overlapping the front side intermediate portion of the absorbent core extend at an angle of 45 ° or more with respect to the width direction. However, in the rear leg elastic member, at least a part of the portion overlapping the rear side portion of the absorbent core and at least a part of the portion overlapping the rear intermediate portion of the absorbent core are 45 ° or more with respect to the width direction. It is preferable that it extends at the angle of. If the front leg elastic member and the posterior leg elastic member are arranged in this way, when the disposable diaper is worn, the absorbent core is formed by the contraction force of the front leg elastic member and the posterior leg elastic member. It is easier to lift it upwards, and the fit of the absorbent core to the wearer's crotch can be improved.

The front leg elastic member is a portion that overlaps with the front intermediate portion of the absorbent core, and is not provided in the region of 5% at one end and the region of 5% at the other end in the width direction of the front intermediate portion of the absorbent core. The elastic member of the rear leg is a portion overlapping the rear intermediate portion of the absorbent core, and is located in a region of 5% at one end and a region of 5% at the other end in the width direction of the rear intermediate portion of the absorbent core. Is preferably not provided. If the front leg elastic member and the rear leg elastic member are provided in this way, the outer edge in the width direction of the absorbent core and its vicinity thereof are less likely to be distorted, and the flatness of the absorbent core is easily maintained.

The length of the separation between the front leg elastic member and the rear leg elastic member in the front-rear direction is preferably 20% or more of the length in the front-back direction of the crotch part. If the front leg elastic member and the rear leg elastic member are arranged in this way, a region where the front leg elastic member and the posterior leg elastic member do not exist is widely formed in the crotch part of the disposable diaper and worn. In the crotch part of the person, the feeling of tightening and the feeling of stiffness due to the elastic member of the front leg and the elastic member of the rear leg are reduced. Therefore, the wearing feeling of the disposable diaper is improved.

The front leg elastic member is a continuous portion extending continuously from the lateral outer portion of the front side portion of the absorbent core to the portion overlapping the front side portion and the front side intermediate portion of the absorbent core, and a portion crossing the crotch portion. It has an intermittent extension, and the elastic member of the rear leg is continuous from the lateral outer portion of the posterior portion of the absorbent core to the portion overlapping the posterior portion and the posterior intermediate portion of the absorbent core. It is preferable to have a continuous portion extending intermittently and an intermittent portion extending intermittently at a portion crossing the crotch portion. If the front leg elastic member and the posterior leg elastic member are provided in this way, the flatness of the absorbent core can be easily ensured throughout, and the absorbent core is suitable toward the crotch portion of the wearer. It becomes easy to lift, and the fit of the absorbent core to the wearer's crotch can be improved.

The posterior end of the continuous portion of the front leg elastic member extends at an angle of 25 ° or more with respect to the width direction, and the front end of the continuous portion of the continuous portion of the rear leg elastic member extends at an angle of 25 ° or more with respect to the width direction. It is preferable that it extends at an angle. If the front leg elastic member and the rear leg elastic member are arranged in this way, the front side at the rear end of the continuous portion of the front leg elastic member and the front end of the continuous portion of the rear leg elastic member. The contraction force of the elastic member of the leg and the elastic member of the posterior leg tends to act in the direction of lifting the absorbent core upward, and the fit of the absorbent core to the wearer's crotch can be improved.

Even if a crotch elastic member that overlaps with the central portion of the absorbent core and extends in the front-rear direction on one side and the other side in the width direction is provided between the front leg elastic member and the rear leg elastic member. good. By providing the crotch elastic member in this way, the crotch elastic member acts in cooperation with the front leg elastic member and the posterior leg elastic member to lift the absorbent core toward the wearer's crotch. do. Therefore, it is possible to improve the fit of the absorbent core to the crotch portion of the wearer. In this case, the crotch elastic member is preferably provided on the back sheet of the absorbent body, whereby the crotch elastic member can be easily installed.

The front torso of the exterior member is provided with a front torso elastic member extending in the width direction in front of the front torso elastic member in the front-rear direction, and the posterior torso of the exterior member is provided with the posterior leg elasticity. It is preferable that a posterior body elastic member extending in the width direction is provided behind the member in the front-rear direction. The front torso elastic member and the posterior torso elastic member can improve the fit around the torso of the wearer of the disposable diaper. Further, by arranging each elastic member in this way, it becomes difficult for the front leg elastic member and the front body elastic member to hinder each other's contraction force, and the rear leg elastic member and the rear body elastic member become. Since it is difficult to inhibit each other's contraction force, the contraction force of each elastic member is likely to be suitably exerted.

In the disposable diaper of the present invention, the elastic member of the front leg and the elastic member of the rear leg are arranged along the outer edge in the width direction of the absorbent core so as to overlap with the absorbent core. Is easier to lift towards the wearer's crotch. Further, since the elastic member is not arranged on the outer side in the width direction of the front intermediate portion, the central portion and the rear intermediate portion of the absorbent core, the outer edge in the width direction of the absorbent core and its vicinity are less likely to be distorted, and the absorbent core is absorbent. It becomes easier to maintain the flatness of the core. Therefore, the absorbent core is lifted toward the wearer's crotch while maintaining flatness without being significantly distorted, and the fit of the absorbent core to the wearer's crotch can be improved.

An example of the disposable diaper of the present invention is shown, and a perspective view of the disposable diaper is shown. A plan view is shown from the skin surface side of the disposable diaper shown in FIG. 1 in which the front torso and the posterior torso are unbonded and unfolded. A plan view of the unfolded disposable diaper shown in FIG. 2 as viewed from the outer surface side is shown. FIG. 2 shows an IV-IV cross-sectional view of the disposable diaper shown in FIGS. 2 and 3. In the disposable diaper in the deployed state shown in FIGS. 2 and 3, a diagram showing mainly the arrangement of the front leg elastic member, the rear leg elastic member, and the absorbent core is shown. A modified example of the plan view of the disposable diaper in the unfolded state seen from the outer surface side shown in FIG. 3 is shown. In the disposable diaper in the deployed state shown in FIG. 6, a diagram showing mainly the arrangement of the front leg elastic member, the rear leg elastic member, the crotch elastic member, and the absorbent core is shown.

The disposable diaper of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments shown in the drawings. 1 to 5 show an example of the disposable diaper of the present invention. FIG. 1 is a perspective view of a disposable diaper, and FIG. 2 is a plan view of the front body and the rear body of the disposable diaper shown in FIG. FIG. 3 shows a plan view of the unfolded disposable diaper shown in FIG. 2 as viewed from the outer surface side, and FIG. 4 shows an IV-IV sectional view of the disposable diaper shown in FIGS. 2 and 3. FIG. 5 shows the arrangement of the front leg elastic member, the rear leg elastic member, and the absorbent core mainly in the unfolded disposable diapers shown in FIGS. 2 and 3. In the drawings, the arrow x represents the width direction, the arrow y represents the front-back direction, and the direction perpendicular to the surface formed by the arrows x and y represents the thickness direction z.

The disposable diaper 1 has a front torso P, a posterior torso Q, and a crotch R located between them, and is formed in a pants shape having a waist opening 3 and a pair of leg openings 4. Is. 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. The front torso P corresponds to the portion that is applied to the ventral side of the wearer when wearing the diaper, and the posterior torso Q corresponds to the portion that is applied to the back side of the wearer when wearing the diaper. In the disposable diaper 1, the front torso P and the posterior torso Q correspond to a portion located between the waist opening 3 and the leg opening 4. The crotch portion R is located between the front torso portion P and the posterior torso portion Q, and corresponds to a portion to be applied to the crotch of the wearer. The crotch R is located between the pair of leg openings 4 and is not joined to each other on both sides in the width direction x. In the disposable diaper 1, the waist opening 3 and the pair of leg openings 4 are formed by joining the front body P and the rear body Q at the side joint 11. The side joint portion 11 is formed, for example, by joining the front side body portion P and the rear side body portion Q on both sides in the width direction x by welding.

In the disposable diaper 1, the front-back direction y corresponds to the direction extending in the front-back direction of the wearer's crotch when the diaper is worn. The width direction x means a direction that is on the same surface as the disposable diaper 1 and orthogonal to the front-back direction y, and corresponds to the left-right direction of the wearer when wearing the diaper. The disposable diaper 1 also has a skin side and an outer side. The skin side means the side facing the skin of the wearer when wearing the diaper, and the outer surface side means the side facing away from the wearer when wearing the diaper.

The disposable diaper 1 is provided with an absorbent main body 7 having an absorbent core 10 arranged between the top sheet 8 and the back sheet 9 at the crotch portion R (see FIGS. 2 to 4). The absorbent body 7 may be present at least in the crotch R, and preferably extends to the anterior torso P and / or the posterior torso Q. In the disposable diaper 1 shown in the drawing, an absorbent main body 7 having an absorbent core 10 arranged between the top sheet 8 and the back seat 9 is provided on the skin surface side of the exterior member 2 formed in the shape of pants. There is. The top sheet 8 is arranged on the skin surface side of the absorbent core 10, and the back sheet 9 is arranged on the outer surface side of the absorbent core 10.

The top sheet 8 is preferably liquid permeable, and is preferably a non-woven fabric formed of hydrophilic fibers such as cellulose, rayon, and cotton, and a polyolefin (for example, polypropylene, polyethylene), polyester (for example, PET), and polyamide (for example). For example, a non-woven fabric formed of hydrophobic fibers such as nylon), in which the surface of the hydrophobic fibers is hydrophilized by a surfactant, or the like can be used. Further, as the top sheet 8, a woven cloth, a knitted cloth, a perforated plastic film or the like may be used.

The backsheet 9 is preferably liquid impermeable, and is, for example, a non-woven fabric formed of hydrophobic fibers such as polyolefin (for example, polypropylene, polyethylene), polyester (for example, PET), polyamide (for example, nylon), and the like. A plastic film or the like can be used. Further, a laminate of a non-woven fabric and a plastic film may be used.

When the top sheet 8 and the back sheet 9 are made of a non-woven fabric, it is preferable to use a spunbonded non-woven fabric, an air-through non-woven fabric, a point-bonded non-woven fabric, a melt blow non-woven fabric, an air-laid non-woven fabric, an SMS non-woven fabric, or the like.

The absorbent core 10 is not particularly limited as long as it contains an absorbent material capable of absorbing excrement such as urine. As the absorbent core 10, for example, a molded body obtained by molding an absorbent material into a predetermined shape can be used. The absorbent core 10 may be covered with a sheet member such as a paper sheet (for example, tissue paper or thin paper) or a liquid permeable non-woven fabric. Examples of the absorbent material contained in the absorbent core 10 include hydrophilic fibers such as cellulose fibers (for example, crushed pulp fibers), polyacrylic acid-based, polyaspartic acid-based, cellulose-based, starch / acrylonitrile-based, and the like. Water-absorbent resin and the like can be mentioned. Further, the absorbent material may include polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as PET, and heat-weldable fibers such as polyamide fibers such as nylon. These heat-weldable fibers may be hydrophilized with a surfactant or the like in order to enhance the affinity with body fluids such as urine.

The absorbent material preferably contains hydrophilic fibers from the viewpoint of increasing the absorption rate of urine and the like. Further, from the viewpoint of increasing the absorption capacity, the absorbent material preferably contains a water-absorbent resin. Therefore, it is preferable that the absorbent core 10 contains hydrophilic fibers (particularly pulp fibers) and a water-absorbent resin. In this case, for example, it is preferable to use an aggregate of hydrophilic fibers mixed or sprayed with a water-absorbent resin.

The absorbent core 10 may be a sheet-like absorber. Examples of the sheet-like absorber include those formed so as to have a water-absorbent resin between the nonwoven fabrics and not to have pulp fibers. Since the sheet-shaped absorber thus formed has a water-absorbent resin between the nonwoven fabrics, a high absorption capacity can be realized. Further, since the sheet-shaped absorber does not have pulp fibers between the non-woven fabrics, it can be formed thin without being bulky.

The absorbent core 10 may be present at least in the crotch R and preferably extends to the anterior torso P and / or the posterior torso Q. The absorbent core 10 is formed in a substantially hourglass shape. Specifically, as shown in FIG. 5, the absorbent core 10 has a front side portion 10A, a front side intermediate portion 10B, a central portion 10C, a rear side intermediate portion 10D, and a rear side portion 10E from the front side in the front-rear direction y. The front side portion 10A and the rear side portion 10E are formed wider than the central portion 10C, and the front side intermediate portion 10B and the rear side intermediate portion 10D are each widened from the central portion 10C toward the front side portion 10A or the rear side portion 10E. Is formed to gradually increase. By forming the absorbent core 10 in this way, the absorbent core 10 is less likely to be pressed from both legs of the wearer at the central portion 10C, and the absorbent core 10 is less likely to be distorted when the diaper is worn.

In the absorbent core 10, the central portion 10C corresponds to a substantially hourglass-shaped constriction, and the outer edge of the front intermediate portion 10B and the rear intermediate portion 10D in the width direction x corresponds to a substantially hourglass-shaped inclined edge portion. In the absorbent core 10, the front side portion 10A and / or the rear side portion 10E is formed most widely in the width direction x, and the central portion 10C is formed most narrowly in the width direction x. The front side portion 10A and the rear side portion 10E may have the same or different lengths in the width direction x, and in the drawing, the front side portion 10A and the rear side portion 10E are formed to have substantially the same width. The absorbent core 10 is formed so that the outer edge in the width direction x extends outward in the width direction x from the central portion 10C toward the front side portion 10A in the front intermediate portion 10B, and the central portion 10C in the rear intermediate portion 10D. It is formed so as to spread outward in the width direction x from the rear side portion 10E. The length of the front-rear intermediate portion 10B in the front-rear direction y and the length of the rear-side intermediate portion 10D in the front-rear direction y are preferably 3% or more, respectively, of 5% or more of the length of the absorbent core 10 in the front-rear direction y. Is more preferable, 7% or more is further preferable, 25% or less is preferable, 20% or less is more preferable, and 15% or less is further preferable. It is preferable that the front side portion 10A, the central portion 10C, and the rear side portion 10E are each formed so that the length in the width direction x does not substantially change.

In the absorbent core 10, it is preferable that the central portion 10C, the front intermediate portion 10B, and the posterior intermediate portion 10D are located only in the crotch portion R. The central portion 10C preferably extends in the front-rear direction y by longitudinally crossing the narrowest portion of the crotch portion R of the exterior member 2. The total length of the central portion 10C, the front intermediate portion 10B, and the posterior intermediate portion 10D in the anteroposterior direction y is preferably 40% or more, more preferably 50% or more, and more preferably 80% or more of the length in the anteroposterior direction y of the crotch portion R. % Or less is preferable, and 70% or less is more preferable. It is preferred that the anterior portion 10A and the posterior portion 10E are located at least in the crotch portion R and further extend to the anterior torso P and / or the posterior torso Q.

As shown in FIGS. 2 and 4, it is preferable that the absorbent main body 7 is provided with rising flaps 12 on both sides in the width direction x. By providing the rising flap 12, it is possible to prevent lateral leakage of excrement such as urine. The rising flap 12 is preferably liquid impermeable. It is preferable that the standing elastic member 13 is provided at the upper end portion (the end portion on the wearer side) of the rising flap 12 in a standing state, and the standing of the standing flap 12 is promoted by the contraction force of the standing elastic member 13. ..

An exterior member 2 is provided on the outer surface side of the absorbent main body 7, and the exterior member 2 is arranged on the front body portion P, the crotch portion R, and the rear side body portion Q. The exterior member 2 is formed so that, for example, the front body portion P, the rear side body portion Q, and the crotch portion R located between them are continuous. In this case, the exterior member 2 can be formed into a pants shape by joining the front body portion P and the rear body portion Q to each other on both sides in the width direction x, and the absorbent body 7 is formed into a pants shape. It is provided at least on the skin surface side of the crotch portion R of the exterior member 2. The exterior member 2 may also be arranged on the front body portion P and a part of the crotch portion R adjacent thereto, and the posterior side body portion Q and another part of the crotch portion R adjacent thereto. In this case, the exterior member 2 is divided into a portion including the front body portion P and a portion including the rear side body portion Q, and the absorbent main body 7 is provided connected to both of these portions, and the absorbent main body 7 is provided. A part of the crotch portion R is provided so as to be exposed on the outer surface side of the disposable diaper 1. In the disposable diaper 1 shown in the drawing, the exterior member 2 is formed in the shape of pants.

The exterior member 2 is provided on the front side body portion P and the rear side body portion Q so as to extend outward in the width direction x from the absorbent body 7. It is preferable that the exterior member 2 is provided so as to extend outward in the width direction x from the absorbent main body 7 even in the crotch portion R. The exterior member 2 is also preferably provided so as to extend forward and backward in the front-rear direction y from the absorbent body 7.

The exterior member 2 preferably has an inner sheet 5 and an outer sheet 6 arranged on the outer surface side of the inner sheet 5. The absorbent body 7 is preferably provided on the skin surface side of the inner sheet 5. The inner sheet 5 and the outer sheet 6 may be liquid-permeable or liquid-impermeable, and a sheet material that can be used for the top sheet 8 and the back sheet 9 can be used. In the drawing, the inner sheet 5 and the outer sheet 6 are formed so as to have a pants shape, respectively, but when the exterior member 2 is formed in a pants shape, at least one of the inner sheet 5 and the outer sheet 6 has a pants shape. It suffices if it is formed in. For example, one of the inner sheet 5 and the outer sheet 6 may be provided separately in the front-rear direction y at the crotch portion R.

The exterior member 2 is provided with leg elastic members 14 and 15 along the edge of the leg opening 4. When the exterior member 2 is composed of the inner sheet 5 and the outer sheet 6, the front leg elastic member 14 and the rear leg elastic member 15 are preferably arranged between the inner sheet 5 and the outer sheet 6. Further, it is preferable that the front leg elastic member 14 and the rear leg elastic member 15 are adhered to the inner sheet 5 and / or the outer sheet 6.

The front leg elastic member 14 is provided so as to cross the crotch portion R and extend along the front edge of the leg opening 4, and the posterior leg elastic member 15 crosses the crotch portion R and has a leg opening. It is provided so as to extend along the rear edge of the portion 4. The front leg elastic member 14 is provided so as to overlap the front side portion 10A and the front side intermediate portion 10B of the absorbent core 10, and the rear leg portion elastic member 15 is provided with the posterior side portion 10E and the rear side intermediate portion of the absorbent core 10. It is provided so as to overlap with 10D (see FIG. 5). Further, in the exterior member 2, no elastic member is arranged outside the front intermediate portion 10B, the central portion 10C, and the rear intermediate portion 10D of the absorbent core 10 in the width direction x. Therefore, the front leg elastic member 14 is not arranged outside the front intermediate portion 10B and the central portion 10C of the absorbent core 10 in the width direction x, and the posterior leg elastic member 15 is the absorbent core 10. It is not arranged outside the width direction x of the rear middle portion 10D and the central portion 10C.

In the disposable diaper 1, the absorbent core 10 is formed in a substantially hourglass shape, and the front leg elastic member 14 and the posterior leg elastic member 15 are arranged as described above, whereby the front leg elastic member 14 and the posterior leg elastic member 14 are arranged. The side leg elastic member 15 is arranged so as to overlap the absorbent core 10 along the outer edge of the absorbent core 10 in the width direction x. Therefore, the front leg elastic member 14 and the rear leg elastic member 15 tend to act so as to lift the entire absorbent core 10 toward the crotch portion of the wearer. Further, the front leg elastic member 14 and the rear leg elastic member 15 are not arranged outside the width direction x of the front intermediate portion 10B, the central portion 10C, and the rear intermediate portion 10D of the absorbent core 10, so that they can be absorbed. The outer edge of the sex core 10 in the width direction x and its vicinity are less likely to be distorted, and the flatness of the absorbent core 10 is easily maintained. Therefore, the absorbent core 10 is easily lifted toward the wearer's crotch portion while maintaining flatness without being significantly distorted, and the fit of the absorbent core 10 to the wearer's crotch portion is enhanced.

The front leg elastic member 14 may be arranged so as to overlap with the central portion 10C of the absorbent core 10. The rear leg elastic member 15 may be arranged so as to overlap with the central portion 10C of the absorbent core 10. The front leg elastic member 14 and the posterior leg elastic member 15 are preferably provided so as to be separated from each other in the front-rear direction y, whereby the front leg elastic member 14 and the posterior leg elastic member 15 contract each other. The contraction force of each elastic member is suitably exhibited without hindering. In this case, the separation length of the front leg elastic member 14 and the rear leg elastic member 15 in the front-rear direction y is preferably 20% or more of the length of the crotch portion R of the disposable diaper 1 in the front-rear direction y. , 25% or more is more preferable, and 30% or more is further preferable. If the front leg elastic member 14 and the rear leg elastic member 15 are provided in this way, a region in which the front leg elastic member 14 and the rear leg elastic member 15 do not exist is widely formed in the crotch portion R. In the crotch portion of the wearer, the feeling of tightening and the feeling of stiffness due to the elastic member 14 of the front leg and the elastic member 15 of the rear leg are reduced. Therefore, the wearing feeling of the disposable diaper 1 is improved. On the other hand, from the viewpoint of allowing the absorbent core 10 to be suitably lifted toward the crotch portion of the wearer by the contractile force of the front leg elastic member 14 and the posterior leg elastic member 15, the front leg elastic member 14 The separation length of the posterior leg elastic member 15 in the anterior-posterior direction y is preferably 70% or less, more preferably 60% or less, and more preferably 50% or less of the length of the crotch portion R of the disposable diaper 1 in the anterior-posterior direction. The following is more preferable.

The separation length of the front leg elastic member 14 and the posterior leg elastic member 15 in the front-rear direction y is developed by breaking the joint between the front body P of the disposable diaper 1 and the side joint 11 of the rear body Q. And specify it in a completely unfolded state. Specifically, in the state where the disposable diaper 1 is unfolded in this way, the elastic member provided in the disposable diaper 1 is completely stretched (for example, the elastic member is finely cut to reduce the contractile force of the elastic member. Measure in the state where it does not appear). Various other lengths, positions and angles herein are measured in the same manner.

In the disposable diaper 1, it is preferable that the front leg elastic member 14 and the rear leg elastic member 15 do not exist at the center of the crotch portion R in the front-rear direction y. Further, in the disposable diaper 1, it is preferable that the region where the front leg elastic member 14 and the posterior leg elastic member 15 do not exist in the crotch portion R is formed unevenly toward the front side in the front-rear direction y of the crotch portion R. Therefore, the length of the anterior-posterior direction y from the center of the crotch portion R in the anteroposterior direction y to the posterior end of the front leg elastic member 14 is the length of the posterior leg elastic member 15 from the center of the crotch portion R in the anteroposterior direction y. It is preferably longer than the length y in the front-rear direction to the front end. For example, the length of the anterior-posterior direction y from the center of the crotch portion R in the anteroposterior direction y to the posterior end of the front leg elastic member 14 is the length of the crotch portion R from the center of the anterior-posterior direction y to the posterior leg elastic member 15. It is preferably 1.2 times or more, more preferably 1.3 times or more, more preferably 3.0 times or less, and even more preferably 2.5 times or less the length of y in the anterior-posterior direction to the front end. By arranging the front leg elastic member 14 and the rear leg elastic member 15 in this way, it becomes easier for the wearer to move the leg back and forth while wearing the disposable diaper 1. For example, when the wearer moves the leg forward, the front leg elastic member 14 makes it difficult for the leg to be hindered, and the front leg elastic member 14 makes it difficult for the wearer to remember the feeling of stiffness.

It is preferable that the front leg elastic member 14 extends intermittently at a portion crossing the crotch portion R. The rear leg elastic member 15 preferably extends intermittently at a portion crossing the crotch portion R. That is, it is preferable that the front leg elastic member 14 and the rear leg elastic member 15 are provided with at least a part of a portion extending in parallel in the width direction x intermittently. If the front leg elastic member 14 and the posterior leg elastic member 15 are provided in this way, the absorbent core is formed at the portion where the front leg elastic member 14 and the posterior leg elastic member 15 cross the crotch portion R. The 10 is less likely to be distorted, and the flatness of the absorbent core 10 is easily maintained. Therefore, it is possible to improve the fit of the absorbent core 10 to the crotch portion of the wearer.

When the front leg elastic member 14 and / or the posterior leg elastic member 15 is provided intermittently, the front leg elastic member 14 and the posterior leg elastic member 15 are bonded to the inner sheet 5 and / or the outer sheet 6. After fixing, the front leg elastic member 14 and the posterior leg elastic member 15 may be cut with a cutter or the like. By doing so, the front leg elastic member 14 and the posterior leg elastic member 15 can be easily and intermittently provided in manufacturing, and the front leg elastic member 14 and the posterior leg elastic member 15 are intermittently provided. The contractile force of the elastic member can be substantially lost at the provided portion.

The front leg elastic member 14 is preferably a portion that overlaps the front side portion 10A and the front side intermediate portion 10B of the absorbent core 10 and extends rearward in the front-rear direction y and inward in the width direction x. The rear leg elastic member 15 is a portion that overlaps the rear side portion 10E and the rear side intermediate portion 10D of the absorbent core 10, and preferably extends forward in the front-rear direction y and inward in the width direction x. ..

In the front leg elastic member 14, at least a part of the portion overlapping the front side portion 10A of the absorbent core 10 and at least a part of the portion overlapping the front intermediate portion 10B of the absorbent core 10 are 45 ° with respect to the width direction x. It is preferably extended at the above angles, more preferably 50 ° or more, and even more preferably 55 ° or more. The upper limit of the angle is not particularly limited, but for example, an angle of 75 ° or less is preferable, an angle of 70 ° or less is more preferable, and an angle of 65 ° or less is further preferable. The front leg elastic member 14 also preferably extends at such an angle at the boundary between the front side portion 10A and the front side intermediate portion 10B of the absorbent core 10. In the rear leg elastic member 15, at least a part of the portion overlapping the rear side portion 10E of the absorbent core 10 and at least a part of the portion overlapping the rear intermediate portion 10D of the absorbent core 10 with respect to the width direction x. It is preferable that it extends at an angle of 45 ° or more, an angle of 50 ° or more is more preferable, and an angle of 55 ° or more is further preferable. The upper limit of the angle is not particularly limited, but for example, an angle of 75 ° or less is preferable, an angle of 70 ° or less is more preferable, and an angle of 65 ° or less is further preferable. The rear leg elastic member 15 also preferably extends at such an angle at the boundary between the rear side portion 10E and the rear side intermediate portion 10D of the absorbent core 10. If the front leg elastic member 14 and the posterior leg elastic member 15 are arranged in this way, the contraction force of the front leg elastic member 14 and the posterior leg elastic member 15 when the disposable diaper 1 is worn. This makes it easier for the absorbent core 10 to be suitably lifted upward, and the fit of the absorbent core 10 to the wearer's crotch portion can be improved. The angle in the extending direction of the front leg elastic member 14 with respect to the width direction x means the absolute value of the angle formed by the width direction x and the extending direction of the front leg elastic member 14, and is rearward with respect to the width direction x. The angle in the extending direction of the side leg elastic member 15 means the absolute value of the angle formed by the width direction x and the extending direction of the rear side leg elastic member 15. Other angles in the present specification also mean the absolute value of the angle formed by the width direction x.

The front leg elastic member 14 is a portion that overlaps with the front intermediate portion 10B of the absorbent core 10, and is a region of 5% at one end and 5% at the other end of the front intermediate portion 10B of the absorbent core 10 in the width direction. It is preferable that it is not provided in the region, and it is more preferable that it is not provided in the region of 10% of one end portion and the region of 10% of the other end portion of the width direction x of the front intermediate portion 10B of the absorbent core 10. The rear leg elastic member 15 is a portion that overlaps with the rear intermediate portion 10D of the absorbent core 10, and is a region of 5% of one end portion of the width direction x of the rear intermediate portion 10D of the absorbent core 10 and the other end portion. It is preferable not to provide it in the region of 5%, and it may not be provided in the region of 10% of one end portion and the region of 10% of the other end portion of the width direction x of the rear intermediate portion 10D of the absorbent core 10. More preferred. If the front leg elastic member 14 and the rear leg elastic member 15 are arranged in this way, the outer edge of the absorbent core 10 in the width direction x and its vicinity are less likely to be distorted, and the flatness of the absorbent core 10 is improved. It will be easier to keep. In the absorbent core 10 shown in the drawings, the region of one end or the other end 5% of the front middle portion 10B or the rear middle portion 10D is formed in a substantially parallelogram shape.

The front leg elastic member 14 is a portion of the front side portion 10A of the absorbent core 10 that overlaps with the outer edge in the width direction x, and preferably extends at an angle of 20 ° or more with respect to the width direction x, and is 25 °. The above angle is more preferable, the angle of 60 ° or less is preferable, and the angle of 50 ° or less is more preferable. The rear leg elastic member 15 is a portion that overlaps with the outer edge of the rear side portion 10E of the absorbent core 10 in the width direction x, and preferably extends at an angle of 20 ° or more with respect to the width direction x. An angle of 25 ° or more is more preferable, an angle of 60 ° or less is preferable, and an angle of 50 ° or less is more preferable. If the front leg elastic member 14 and the posterior leg elastic member 15 are arranged in this way, the contraction force of the front leg elastic member 14 and the posterior leg elastic member 15 when the disposable diaper 1 is worn. As the absorbent core 10 is lifted upward, the front side portion 10A and the rear side portion 10E of the absorbent core 10 expand in the width direction x, and the fit of the absorbent core 10 to the wearer's crotch is improved. be able to.

The front leg elastic member 14 preferably extends from the portion overlapping the front side portion 10A of the absorbent core 10 toward the outside of the front side portion 10A of the absorbent core 10 in the width direction x, and is preferably the side joint portion 11 or its vicinity. It is preferable that it extends to (for example, a region within 20 mm in the width direction x from the side joint portion 11). The rear leg elastic member 15 preferably extends from the portion overlapping the rear side portion 10E of the absorbent core 10 toward the outside of the rear side portion 10E of the absorbent core 10 in the width direction x, and the side joint portion 11 Alternatively, it preferably extends to the vicinity thereof (for example, a region within 20 mm in the width direction x from the side joint portion 11). As a result, the front side portion 10A and the rear side portion 10E of the absorbent core 10 tend to spread in the width direction x due to the contraction force of the front leg elastic member 14 and the rear leg elastic member 15, and the wearer of the absorbent core 10 wears the absorbent core 10. It is possible to improve the fit to the crotch part of the body.

It is preferable that the front leg elastic member 14 is provided only in the rear 1/3 region of the front body P in the front-rear direction y in the front body P of the exterior member 2. Further, in the exterior member 2, it is preferable that the front leg elastic member 14 does not intersect with other elastic members. The posterior leg elastic member 15 is preferably provided only in the front 1/3 region of the rear body Q in the front-rear direction y in the rear body Q of the exterior member 2. Further, in the exterior member 2, it is preferable that the rear leg elastic member 15 does not intersect with other elastic members. By arranging the front leg elastic member 14 and the rear leg elastic member 15 in this way, the front leg elastic member 14 and the rear leg elastic member 15 gather together along the edge of the leg opening 4. It is suitably formed and can improve the fit around the legs of the disposable diaper 1.

The front leg elastic member 14 extends continuously from the outer portion of the front side portion 10A of the absorbent core 10 in the width direction x to the portion overlapping the front side portion 10A and the front intermediate portion 10B of the absorbent core 10. Preferably, the rear leg elastic member 15 is continuous from the outer portion of the rear side portion 10E of the absorbent core 10 in the width direction x to the portion overlapping the rear side portion 10E and the rear side intermediate portion 10D of the absorbent core 10. It is preferable that it extends to. Further, as described above, it is preferable that the front leg elastic member 14 and the rear leg elastic member 15 extend intermittently at a portion crossing the crotch portion R. Therefore, the front leg elastic member 14 is a continuous portion that continuously extends from the outer portion of the front side portion 10A of the absorbent core 10 in the width direction x to the portion overlapping the front side portion 10A and the front intermediate portion 10B of the absorbent core 10. It is preferable to have an intermittent portion extending intermittently at a portion crossing the crotch portion R, and the rear leg elastic member 15 absorbs from the outer portion of the rear side portion 10E of the absorbent core 10 in the width direction x. It is preferable to have a continuous portion extending continuously over the portion overlapping the rear side portion 10E and the rear side intermediate portion 10D of the sex core 10, and an intermittent portion extending intermittently at a portion crossing the crotch portion R. If the front leg elastic member 14 and the posterior leg elastic member 15 are provided in this way, the flatness of the absorbent core 10 can be easily ensured as a whole, and the absorbent core 10 can be easily secured in the crotch portion of the wearer. It becomes easier to lift toward the center, and the fit of the absorbent core 10 to the crotch portion of the wearer can be improved.

The posterior end 14E of the continuous portion of the front leg elastic member 14 preferably extends at an angle of 25 ° or more with respect to the width direction x, more preferably an angle of 30 ° or more, and more preferably 35 ° or more. The angle is even more preferred. The upper limit of the angle is not particularly limited, but for example, an angle of 70 ° or less is preferable, an angle of 60 ° or less is more preferable, and an angle of 50 ° or less is further preferable. The front end 15E of the continuous portion of the continuous portion of the rear leg elastic member 15 preferably extends at an angle of 25 ° or more with respect to the width direction x, more preferably an angle of 30 ° or more, and more preferably 35 ° or more. The angle is even more preferred. The upper limit of the angle is not particularly limited, but for example, an angle of 70 ° or less is preferable, an angle of 60 ° or less is more preferable, and an angle of 50 ° or less is further preferable. If the front leg elastic member 14 and the rear leg elastic member 15 are arranged in this way, the continuous portion of the rear end 14E of the continuous portion of the front leg elastic member 14 and the continuous portion of the rear leg elastic member 15 At the front end 15E, a force is likely to act in the direction of lifting the absorbent core 10 upward, and the fit of the absorbent core 10 to the wearer's crotch portion can be improved.

The separation length of the width direction x of the front end elastic member 14 in the width direction x between the rear end 14E of the continuous portion on one side and the rear end 14E of the continuous portion on the other side is the central portion 10C of the absorbent core 10. It is preferably 30% or more, more preferably 40% or more, more preferably 90% or less, and even more preferably 80% or less of the length in the width direction x. The separation length of the width direction x of the front end 15E of the continuous portion on one side of the elastic member 15 of the rear leg portion 15 and the front end 15E of the continuous portion on the other side is the central portion 10C of the absorbent core 10. It is preferably 30% or more, more preferably 40% or more, more preferably 90% or less, and even more preferably 80% or less of the length in the width direction x. If the front leg elastic member 14 and the rear leg elastic member 15 are arranged in this way, the contractile force of the front leg elastic member 14 and the rear leg elastic member 15 causes the absorbent core 10 to be in the width direction. The whole of x tends to be lifted upward.

The separation length in the front-rear direction y between the rear end 14E of the continuous portion of the front leg elastic member 14 and the front end 15E of the continuous portion of the continuous portion of the rear leg elastic member 15 is the anteroposterior direction y of the crotch portion R of the disposable diaper 1. It is preferably 20% or more, more preferably 25% or more, still more preferably 30% or more. If the front leg elastic member 14 and the rear leg elastic member 15 are arranged in this way, there is a region in which the contractile force of the front leg elastic member 14 and the rear leg elastic member 15 does not act on the crotch portion R. It is widely formed, and the feeling of tightening and the feeling of stiffness due to the elastic member 14 of the front leg and the elastic member 15 of the rear leg are reduced in the crotch portion of the wearer. On the other hand, from the viewpoint of allowing the absorbent core 10 to be suitably lifted toward the crotch portion of the wearer by the contractile force of the front leg elastic member 14 and the posterior leg elastic member 15, the front leg elastic member 14 The separation length of the posterior end 14E of the continuous portion and the front end 15E of the continuous portion of the elastic member 15 of the rear leg in the anteroposterior direction is 70% or less of the length y in the anterior-posterior direction of the crotch portion R of the disposable diaper 1. It is preferably 60% or less, more preferably 50% or less, and even more preferably 50% or less.

The length of the anterior-posterior direction y from the center of the crotch portion R in the anterior-posterior direction to the posterior end 14E of the continuous portion of the front leg elastic member 14 is the length of the crotch portion R from the center of the anterior-posterior direction y to the posterior leg elastic member. It is preferably longer than the length y in the anteroposterior direction up to the front end 15E of the continuous portion of 15. For example, the length of the anterior-posterior direction y from the center of the crotch portion R in the anteroposterior direction y to the posterior end 14E of the continuous portion of the front leg elastic member 14 is the length of the crotch portion R from the center of the anterior-posterior direction y to the posterior leg portion. The length of the continuous portion of the elastic member 15 up to the front end 15E in the front-rear direction y is preferably 1.2 times or more, more preferably 1.3 times or more, and preferably 3.0 times or less, and 2.5 times or less. Is more preferable. By providing the front leg elastic member 14 and the rear leg elastic member 15 in this way, it becomes easier for the wearer to move the legs back and forth while wearing the disposable diaper 1. That is, when the wearer moves the leg forward, the movement of the leg is less likely to be hindered by the front leg elastic member 14.

It is preferable that a plurality of front leg elastic members 14 and rear leg elastic members 15 are arranged side by side on the exterior member 2. In the drawings, four front leg elastic members 14 and four rear leg elastic members 15 are arranged side by side, but two or three may be arranged side by side, and five or more are arranged side by side. You may. By arranging the front leg elastic member 14 and the rear leg elastic member 15 in this way, a band-shaped front leg elastic region is formed by the plurality of front leg elastic members 14, and a plurality of posterior sides are formed. The leg elastic member 15 forms a band-shaped posterior leg elastic region. Therefore, the absorbent core 10 can be supported more stably by the front leg elastic member 14 and the rear leg elastic member 15. The width in which the plurality of front leg elastic members 14 are arranged, that is, the width of the band-shaped front leg elastic region with respect to the extending direction, and the width in which the plurality of rear leg elastic members 15 are arranged, that is, the band-shaped The width of the elastic region of the rear leg with respect to the extending direction is preferably 5 mm or more, more preferably 8 mm or more, preferably 30 mm or less, and more preferably 25 mm or less.

Between the front leg elastic member 14 and the rear leg elastic member 15, the crotch elastic member that overlaps with the central portion 10C of the absorbent core 10 and extends in the front-rear direction y to one side and the other side in the width direction x. 16 may be provided. This will be described with reference to FIGS. 6 and 7. FIG. 6 shows a modified example of the plan view of the unfolded disposable diaper shown in FIG. 3, and FIG. 7 shows mainly the front leg elastic member and the rear leg in the unfolded disposable diaper shown in FIG. The figure which showed the arrangement of a part elastic member, a crotch elastic member, and an absorbent core is shown. The disposable diaper 1 shown in FIGS. 6 and 7 is further provided with a crotch elastic member 16 with respect to the disposable diaper 1 shown in FIGS. 1 to 5.

As shown in FIGS. 6 and 7, the disposable diaper 1 is provided between the front leg elastic member 14 and the rear leg elastic member 15 so as to overlap the central portion 10C of the absorbent core 10 in the width direction x. The crotch elastic member 16 extending in the front-rear direction y may be provided on one side and the other side. By providing the crotch elastic member 16 in this way, the crotch elastic member 16 cooperates with the front leg elastic member 14 and the rear leg elastic member 15 to direct the absorbent core 10 toward the wearer's crotch portion. Acts to lift. Therefore, it is possible to improve the fit of the absorbent core 10 to the crotch portion of the wearer. The crotch elastic member 16 may be provided so as to overlap the central portion 10C of the absorbent core 10 and / or overlap the front intermediate portion 10B and / or the posterior intermediate portion 10D. It is preferable that the crotch elastic member 16 does not overlap the front side portion 10A and the rear side portion 10E of the absorbent core 10.

The crotch elastic member 16 is preferably provided on the exterior member 2 or on the back sheet 9 of the absorbent body 7. For example, the crotch elastic member 16 is preferably adhered to the inner sheet 5 and / or the outer sheet 6 of the exterior member 2 or to the back sheet 9 of the absorbent body 7. It is preferable that the crotch elastic member 16 is provided on the back sheet 9 of the absorbent main body 7 from the viewpoint that the crotch elastic member 16 can be easily installed.

The front end of the crotch elastic member 16 may be at or near the posterior end of the front leg elastic member 14 (for example, within 15 mm in the front-rear direction y from the posterior end of the front leg elastic member 14). Preferably, the posterior end of the crotch elastic member 16 is located at or near the anterior end of the posterior leg elastic member 15 (for example, within 15 mm in the front-rear direction y from the front end of the posterior leg elastic member 15). It is preferable to have. More preferably, the front end of the crotch elastic member 16 is within a range of 15 mm rearward in the front-rear direction y from the rear end of the front leg elastic member 14, and the rear end of the crotch elastic member 16 is the posterior leg portion. It is within a range of 15 mm in front of the elastic member 15 in the front-rear direction y from the front end. If the crotch elastic member 16 is arranged in this way, the integralness of the crotch elastic member 16, the front leg elastic member 14, and the rear leg elastic member 15 can be enhanced.

The separation length of the crotch elastic member 16 arranged on one side of the width direction x and the crotch elastic member 16 arranged on the other side in the width direction x is the width direction x of the central portion 10C of the absorbent core 10. The length is preferably 40% or more, more preferably 50% or more, more preferably 80% or less, and even more preferably 70% or less. When the crotch elastic member 16 is arranged in this way, the entire width direction x of the absorbent core 10 is likely to be lifted upward by the contraction force of the crotch elastic member 16.

It is preferable that a plurality of crotch elastic members 16 on one side in the width direction x and a plurality of crotch elastic members 16 on the other side are arranged side by side. In the drawing, two crotch elastic members 16 on one side and the crotch elastic member 16 on the other side in the width direction x are arranged side by side, but three or more may be arranged side by side. By arranging the crotch elastic member 16 in this way, the absorbent core 10 can be more stably lifted toward the crotch portion of the wearer by the contraction force of the crotch elastic member 16.

As shown in FIGS. 1 to 3 and 6, the disposable diaper 1 is provided with a front body elastic member 17 extending in the width direction x on the front body P, and a front body elastic member 17 extending in the width direction x on the rear body Q. It is preferable that the extended rear body elastic member 18 is provided. The front torso elastic member 17 and the posterior torso elastic member 18 are provided between the waist opening 3 and the leg opening 4. The front torso elastic member 17 and the posterior torso elastic member 18 enhance the fit around the torso of the wearer of the disposable diaper 1. Of the front body elastic member 17 and the rear body elastic member 18, elastic members provided at narrow intervals in the front-rear direction y along the edge of the waist opening 3 may be provided as the waist elastic member 19. As a result, waist gathers are formed along the waist of the wearer, and leakage of excrement such as urine from the back side and the abdomen side is prevented. In FIGS. 1 to 3 and 6, the lumbar elastic member 19 is provided at a narrower distance in the front-rear direction y than the front body elastic member 17 and the rear body elastic member 18.

The front body elastic member 17, the rear body elastic member 18, and the lumbar elastic member 19 are preferably provided on the exterior member 2, and more preferably provided between the inner sheet 5 and the outer sheet 6. In this case, the front body elastic member 17, the rear body elastic member 18, and the lumbar elastic member 19 are preferably bonded to the inner sheet 5 and / or the outer sheet 6.

The exterior member 2 may be folded back along the edge of the waist opening 3. For example, the outer sheet 6 may be folded back toward the inner sheet 5 at the edge of the waist opening 3 (not shown). In this case, the lumbar elastic member 19 may be sandwiched between the folded outer sheets 6 and adhered to the outer sheet 6.

In the front torso P, the front torso elastic member 17 is preferably arranged in front of the front leg elastic member 14 in the front-rear direction y, and in the posterior torso Q, the posterior torso elastic member 18 is rear. It is preferably arranged behind the side leg elastic member 15 in the front-rear direction y. That is, it is preferable that the front body elastic member 17 does not intersect or contact the front leg elastic member 14, and the rear body elastic member 18 preferably does not intersect or contact the rear leg elastic member 15. By arranging each elastic member in this way, the contractile force of each elastic member is less likely to be hindered by each other. As a result, the fit around the legs of the disposable diaper 1 can be improved by the front leg elastic member 14 and the rear leg elastic member 15, and the disposable diaper 1 is disposable by the front body elastic member 17 and the rear body elastic member 18. The fit around the waist of the diaper 1 can be improved.

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

1: Disposable diaper 2: Exterior member 3: Waist opening 4: Leg opening 5: Inner sheet 6: Outer sheet 7: Absorbable body 8: Top sheet 9: Back sheet 10: Absorbent core 11: Side joint 14 : Front leg elastic member 15: Rear leg elastic member 16: Crotch elastic member 17: Front body elastic member 18: Rear body elastic member 19: Waist elastic member

Claims (8)

Pants having a front torso, a posterior torso, and a crotch located between them, and having a waist opening and a pair of leg openings by joining the anterior torso and the posterior torso. A disposable diaper formed into a shape,
At least the crotch of the diaper is provided with an absorbent body having a topsheet, a backseat and an absorbent core arranged between them.
The absorbent core has an anterior side, an anterior intermediate portion, a central portion, a posterior intermediate portion, and a posterior portion from the front side in the anterior-posterior direction, and the anterior side portion and the posterior portion are formed wider than the central portion. , The anterior middle part and the posterior middle part are formed so as to gradually increase in width from the central part to the front side part or the rear side part, respectively.
An exterior member is provided on the outer surface side of the absorbent body, and the exterior member is arranged on the front trunk portion, the crotch portion, and the rear trunk portion.
The exterior member includes an anterior leg elastic member that crosses the crotch and extends along the anterior edge of the leg opening, and a posterior member that traverses the crotch and extends along the posterior edge of the leg opening. A leg elastic member is provided, the front leg elastic member overlaps the anterior and anterior intermediate portions of the absorbent core, and the posterior leg elastic member overlaps the posterior and posterior intermediate portions of the absorbent core. Overlapping,
The front leg elastic member crosses the crotch portion and a continuous portion that continuously extends from the lateral outer portion of the front side portion of the absorbent core to the portion overlapping the front side portion and the front intermediate portion of the absorbent core. It has an intermittent part that extends intermittently in the part,
The rear leg elastic member has a continuous portion extending continuously from the lateral outer portion of the rear side portion of the absorbent core to a portion overlapping the rear side portion and the rear side intermediate portion of the absorbent core, and the crotch portion. It has an intermittent part that extends intermittently at the part that crosses the part,
The disposable diaper is characterized in that no elastic member is arranged on the outer side in the width direction of the front intermediate portion, the central portion and the rear intermediate portion of the absorbent core. In the front leg elastic member, at least a part of the portion overlapping the front side portion of the absorbent core and at least a part of the portion overlapping the front side intermediate portion of the absorbent core extend at an angle of 45 ° or more with respect to the width direction. Being there
In the rear leg elastic member, at least a part of the portion overlapping the rear side portion of the absorbent core and at least a part of the portion overlapping the rear intermediate portion of the absorbent core are 45 ° or more with respect to the width direction. The disposable diaper according to claim 1, which extends at an angle. The front leg elastic member is provided in a portion overlapping the front intermediate portion of the absorbent core, and is provided in a region of 5% at one end and a region of 5% at the other end in the width direction of the front intermediate portion of the absorbent core. figure,
The rear leg elastic member overlaps with the rear intermediate portion of the absorbent core, and is located in a region of 5% at one end and a region of 5% at the other end in the width direction of the rear intermediate portion of the absorbent core. The disposable diaper according to claim 1 or 2, which is not provided. 13. Disposable diapers. The posterior end of the continuous portion of the front leg elastic member extends at an angle of 25 ° or more with respect to the width direction.
The disposable diaper according to any one of claims 1 to 4, wherein the front end of the continuous portion of the continuous portion of the rear leg elastic member extends at an angle of 25 ° or more with respect to the width direction. Between the front leg elastic member and the rear leg elastic member, a crotch elastic member that overlaps with the central portion of the absorbent core and extends in the front-rear direction on one side and the other side in the width direction is provided. The disposable diaper according to any one of claims 1 to 5 . The disposable diaper according to claim 6 , wherein the crotch elastic member is provided on the back sheet of the absorbent body. The front body portion of the exterior member is provided with a front body portion elastic member extending in the width direction in front of the front leg elastic member in the front-rear direction.
Any one of claims 1 to 7 , wherein the rear body of the exterior member is provided with a rear body elastic member extending in the width direction behind the rear leg elastic member in the front-rear direction. Disposable diapers as described in the section.

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