JP7107750B2 - disposable pant diaper - Google Patents

Description

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

2. Description of the Related Art Conventionally, disposable pants-type diapers having a waist opening and a pair of leg openings are widely known (for example, Patent Documents 1 to 5).

JP-A-8-280739 JP-A-2004-049763 JP 2004-298395 A JP 2005-087622 A JP 2014-180346 A

Disposable pants-type diapers are often provided with leg elastic members along the edges of the leg openings, and the contractile force of the leg elastic members forms gathers along the edges of the leg openings of the diaper, It is possible to enhance the fit around the wearer's legs. On the other hand, when wearing a disposable pants-type diaper for a long period of time, some wearers may feel that the leg elastic members are tightly tightened. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a disposable pull-on diaper in which tightness around the legs is reduced.

The disposable pants-type diaper of the present invention, which has solved the above problems, has a front body portion, a rear body portion, and a crotch portion positioned therebetween, and has a front body portion and a rear body portion. A disposable pants-type diaper formed in a pants shape having a waist opening and a pair of leg openings by joining the diaper; a front leg elastic member extending along the front edge of the leg opening to the junction of the front torso and the rear torso; and a rear leg elastic member extending to the junction of the torso and the rear torso; the front leg elastic member extends along the edge of the leg opening on one side and does not overlap the absorbent body. 1 part, a front second part that overlaps the absorbent body, and a front third part that extends along the edge of the leg opening on the other side and does not overlap the absorbent body, wherein the front first part and the front third part The 3 parts are separated at a plurality of points and provided intermittently; the front first part and the front third part are each located within 50 mm from the joint (near the joint), and the front second part is closer to the joint. It is characterized in that it is provided at a longer pitch than the inclined extension portions arranged at an angle of 35° or more with respect to the width direction of the diaper.

In the disposable pants-type diaper of the present invention, since the front first portion and the front third portion of the front leg elastic member are intermittently provided at a plurality of points, the leg area of the wearer, particularly the groin area, is discontinuously provided. The tightness at the bottom is relaxed, and the feeling of wearing around the leg openings can be improved when wearing the diaper. In addition, since the portions where the front leg elastic members are intermittently provided are provided with a certain degree of rigidity, even if the elastic force of the portions is reduced, the pants shape of the diaper is preferably maintained. In addition, since the front first portion and the front third portion are provided at a pitch longer than that of the inclined extension portion in the vicinity of the joint portion, the disposable pants-type diaper can be worn at the edges of the leg openings. The vicinity of the groin portion is pulled toward the joint portion, and the tightness at the groin portion can be reduced, while the fit at the portion can be improved.

It is preferable that the front leg elastic members are provided at an average pitch of 3 mm to 20 mm in the inclined extension portion of the front first portion and the inclined extension portion of the front third portion. If the front leg elastic members are provided at such a pitch in the inclined extension portion, the tightness at the groin portion of the diaper can be reduced, and appropriate rigidity can be imparted to the portion, and the diaper can be made into a pants shape. It becomes easier to maintain.

Preferably, the front leg elastic member is intermittently provided by dividing the front second portion at a plurality of locations. This prevents the absorber from being distorted due to the contractile force of the front leg elastic member, and improves the fit of the absorber to the crotch area of the wearer.

It is preferable that the front leg elastic members are arranged at both ends of the second front portion at an angle of 30° or less with respect to the width direction of the diaper. If the front second portion is provided in this manner, the contractile force of the front leg elastic member facilitates forming the absorber to expand in the diaper width direction. In this case, the front first portion and the front third portion are preferably provided at a pitch longer than the inclined extension portion on the front second portion side than the inclined extension portion. The contractile force of the portion of the front third portion near the front second portion is likely to be exerted more strongly.

The rear leg elastic member extends along the edge of the leg opening on one side, and includes a first rear portion that does not overlap the absorbent body, a second rear portion that overlaps the absorbent body, and a leg opening on the other side. and a rear third portion that extends along the edge of the absorbent body and does not overlap with the absorbent body, and the rear first portion and the rear third portion are separated at a plurality of points and provided intermittently. is preferred. As a result, tightening of the diaper on the buttocks of the wearer of the diaper is relieved, and the feeling of wearing the diaper can be improved.

In the rear elastic member, in the rear first portion and the rear third portion, the portion within 50 mm from the joint portion is located on the rear second portion side and is at an angle of 35° or more with respect to the diaper width direction. Preferably, they are provided at a longer pitch than the oblique extensions arranged at an angle. By constructing the rear first portion and the rear third portion in this way, the inclined extension portion is pulled toward the joint portion, and while the tightening of the diaper wearer's buttocks is alleviated, The fit to the wearer's buttocks can be improved.

It is preferable that the rear leg elastic members are provided at an average pitch of 3 mm to 20 mm in the inclined extension portion of the rear first portion and the inclined extension portion of the rear third portion. If the rear leg elastic members are provided at such a pitch in the inclined extension portion, the tightening of the buttocks of the diaper can be reduced, and appropriate rigidity can be imparted to the relevant portion, making the diaper suitable for a pants shape. easier to maintain.

It is preferable that the rear leg elastic member is intermittently provided by dividing the rear second portion at a plurality of locations. As a result, the absorber is prevented from being distorted by the contractile force of the rear leg elastic member, and the fit of the absorber to the crotch area of the wearer can be improved.

In the disposable pants-type diaper of the present invention, the front leg elastic members are intermittently divided at a plurality of locations along the edge of the leg openings. The tightening is relaxed, and the feeling of wearing around the leg openings can be improved when wearing the diaper. In addition, since the vicinity of the joint between the front body and the rear body of the front leg elastic member is provided at a long pitch, the vicinity of the edge of the leg opening is pulled toward the joint. Thus, it is possible to improve fit to the wearer's skin by suppressing slackness in the groin region while relieving tightening in the groin region.

1 shows a perspective view of a disposable pant diaper. FIG. The top view which looked at the state which released|released the joining of the front side trunk|drum and the back side trunk|drum of the disposable pants-type diaper shown in FIG. 3 represents a III-III cross-sectional view of the disposable pants-type diaper shown in FIG. FIG. 3 is a diagram mainly showing the arrangement of leg elastic members and an absorbent body in the unfolded disposable pants-type diaper shown in FIG. 2 ;

The disposable pants-type diaper of the present invention will be described with reference to the drawings. The invention is not limited to the embodiments shown in the drawings. 1 to 3 show an example of the disposable pants-type diaper of the present invention. FIG. 1 shows a perspective view of a disposable pants-type diaper, and FIG. 2 shows a state in which the front body portion and the rear body portion of the disposable pants-type diaper shown in FIG. FIG. 3 represents a III-III cross-sectional view of the disposable pants-type diaper shown in FIG. In the drawings, the arrow x indicates the diaper width direction, the arrow y indicates the diaper front-back direction, and the direction perpendicular to the plane formed by the arrows x and y indicates the diaper thickness direction z. Moreover, in this invention, a diaper width direction, a diaper front-back direction, and a diaper thickness direction may only be called a width direction, a front-back direction, and a thickness direction.

The disposable pants-type diaper 1 has a front body portion P, a rear body portion Q, and a crotch portion R positioned therebetween, and is formed in a pants shape having a waist opening 3 and a pair of leg openings 4. It is a thing. The waist opening 3 is an opening for passing the torso of the wearer, and the leg opening 4 is an opening for passing the legs of the wearer. The front trunk portion P corresponds to the portion that is brought into contact with the abdomen of the wearer when the diaper is put on, and the rear trunk portion Q is the portion that is brought into contact with the back of the wearer when the diaper is worn. In the disposable pants-type diaper 1 , the front body portion P and the rear body portion Q correspond to portions positioned between the waist opening 3 and the leg openings 4 . The crotch part R is positioned between the front side body part P and the rear side side body part Q, and corresponds to the part that is applied to the wearer's crotch. The crotch portion R is positioned between a pair of leg openings 4 and is not joined to each other on both sides in the width direction x. In the disposable pants-type diaper 1, a waist opening 3 and a pair of leg openings 4 are formed by joining a front side body portion P and a rear side body portion Q at a joint portion 11. As shown in FIG. The joint portion 11 is formed, for example, by joining both sides of the front trunk portion P and the rear trunk portion Q in the width direction x by heat-sealing.

In the disposable pants-type diaper 1, the front-rear direction y corresponds to the direction extending in the front-rear direction between the wearer's crotch when the diaper is worn. The width direction x means a direction that is on the same plane as the disposable pants-type diaper 1 and perpendicular to the front-rear direction y, and corresponds to the lateral direction of the wearer when wearing the diaper. The disposable pants-type diaper 1 also has a skin side and an outer side. The skin side means the side facing the wearer's skin when the diaper is worn, and the outer side means the side facing away from the wearer when the diaper is worn.

An absorber 10 is provided in the crotch region R of the disposable pants-type diaper 1. - 特許庁The absorbent body 10 may be present at least in the crotch region R, and may extend to the front body region P and/or the rear body region Q. In the disposable pants-type diaper 1 shown in the drawings, an absorbent main body 7 having an absorbent body 10 arranged between a top sheet 8 and a back sheet 9 is provided on the skin surface side of an exterior member 2 formed in the shape of pants. ing. The top sheet 8 is arranged on the skin surface side of the absorbent body 10 , and the back sheet 9 is arranged on the outer surface side of the absorbent body 10 . Although not shown in the drawings, the absorbent body may be arranged between the layers of the layered body formed in the shape of underpants.

The absorbent main body 7 is arranged at least in the crotch region of the diaper 1 and may further extend to the front body portion P and/or the rear body portion Q. The exterior member 2 basically extends outward in the width direction x from the absorbent body 7 . The exterior member 2 preferably extends further outward in the front-rear direction y than the absorbent body 7 .

The top sheet 8 is preferably liquid-permeable, for example, a nonwoven fabric made of hydrophilic fibers such as cellulose, rayon, cotton, polyolefin (eg, polypropylene, polyethylene), polyester (eg, PET), polyamide (eg, For example, it is possible to use a nonwoven fabric formed from hydrophobic fibers such as nylon, the surface of which is hydrophilized with a surfactant. As the top sheet 8, a woven fabric, a knitted fabric, a perforated plastic film, or the like may be used.

The back sheet 9 is preferably liquid-impermeable, for example, a nonwoven fabric made of hydrophobic fibers such as polyolefin (e.g., polypropylene, polyethylene), polyester (e.g., PET), polyamide (e.g., nylon), A plastic film or the like can be used. A laminate of a nonwoven fabric and a plastic film may also be used.

When the top sheet 8 and the back sheet 9 are made of nonwoven fabric, it is preferable to use spunbonded nonwoven fabric, air-through nonwoven fabric, point-bonded nonwoven fabric, meltblown nonwoven fabric, air-laid nonwoven fabric, SMS nonwoven fabric, etc. as the nonwoven fabric.

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

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

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

The absorbent body 10 may use water absorbent fibers as the absorbent material. Also in this case, the absorber 10 can be formed thin. Absorbent fibers include fibers containing protonated or salted carboxyl groups. For example, water-absorbing fibers can be obtained by hydrolyzing acrylic fibers to convert nitrile groups contained in the acrylic fibers into carboxyl groups. At this time, the carboxyl groups contained in the water-absorbing fibers preferably form an alkali metal salt or an ammonium salt. Also, the water-absorbent fiber can be produced by immersing a hydrophilic fiber in acrylic acid to precipitate the acrylic acid on the fiber surface.

The shape (planar shape) of the absorber 10 is not particularly limited. Examples of the shape of the absorber 10 include a substantially rectangular shape, an hourglass shape, a gourd shape, a battledore shape, and the like. In FIG. 2, the absorbent body 10 is formed in an hourglass shape.

The absorbent main body 7 is preferably provided with rising flaps 12 on both sides in the width direction x. By providing the rising flap 12, side leakage of excrement such as urine can be prevented. The rise flap 12 is preferably liquid impermeable. A standing elastic member 13 is preferably provided at the upper end of the raised flap 12 (the end on the wearer's side). .

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 main 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 sheet materials that can be used for the top sheet 8 and the back sheet 9 can be used.

The diaper 1 is provided with leg elastic members 14 and 15 along the edges of the leg openings 4 . Specifically, a front leg elastic member 14 that traverses the crotch portion R and extends along the front edge of the leg opening 4 to the joint portion 11 between the front trunk portion P and the rear trunk portion Q; and extending along the rear edge of the leg opening 4 to the joint 11 of the front trunk P and the rear trunk Q. As shown in FIG. The front leg elastic member 14 and the rear leg elastic member 15 are preferably provided on the exterior member 2 and more preferably provided between the inner sheet 5 and the outer sheet 6 of the exterior member 2 . The front leg elastic members 14 and the rear leg elastic members 15 are preferably glued to the inner sheet 5 and/or the outer sheet 6 . In the drawings, the front leg elastic members 14 and the rear leg elastic members 15 are spaced apart from each other, but the front leg elastic members 14 and the rear leg elastic members 15 are in contact with or cross each other. may

The front leg elastic member 14 and the rear leg elastic member 15 will be described in detail below with reference to FIG. In FIG. 4, the absorbent main body 7 is removed from the disposable pants-type diaper 1 in the unfolded state shown in FIG. It is extracted and shown. A portion where the absorber 10 was originally arranged is indicated by a dotted line. In FIG. 4, the front leg elastic members 14 and the rear leg elastic members 15 are indicated by dotted lines because they cannot be directly seen when the exterior member 2 is viewed from the skin side. Therefore, the pitch of the dotted line does not represent the pitch of the front leg elastic members 14 and the rear leg elastic members 15 intermittently provided. The same applies to various elastic members in FIG.

The front leg elastic member 14 is divided into three parts as follows. That is, the front leg elastic member 14 extends along the edge of the leg opening 4 on one side, and includes a front first portion 14A that does not overlap with the absorbent body 10, a front second portion 14B that overlaps with the absorbent body 10, and a second front portion 14B that overlaps with the absorbent body 10. It has a front third portion 14C that extends along the edge of the side leg opening 4 and does not overlap the absorbent body 10. - 特許庁In the front leg elastic member 14, the front second portion 14B is located between the front first portion 14A and the front third portion 14C and is a portion that crosses the crotch portion R in the width direction x.

The rear leg elastic member 15 is divided into three parts as follows. That is, the rear leg elastic member 15 extends along the edge of the leg opening 4 on one side, and includes a rear first portion 15A that does not overlap the absorbent body 10 and a rear second portion 15B that overlaps the absorbent body 10. and a rear third portion 15C that extends along the edge of the leg opening 4 on the other side and does not overlap the absorbent body 10. - 特許庁In the rear leg elastic member 15, the rear second portion 15B is located between the rear first portion 15A and the rear third portion 15C and is a portion that crosses the crotch portion R in the width direction x. .

The front leg elastic member 14 is intermittently provided by dividing the front first portion 14A and the front third portion 14C at a plurality of locations. As a result, the diaper 1 is less tight around the wearer's legs, especially around the groin, and can improve the wearing comfort around the leg openings 4 when wearing the diaper. In addition, since the front first portion 14A and the front third portion 14C are separated at a plurality of locations and provided intermittently, a certain rigidity is imparted to the portions, and the shape of the pants is preferably maintained. become.

If the front leg elastic members 14 are intermittently provided in this manner, the edges of the leg openings 4 of the diaper 1 may hang down when the diaper is put on, which may interfere with the movement of the legs. Therefore, the front first portion 14A and the front third portion 14C are designed to be more strongly tensioned in the vicinity of the joint portion 11 . Specifically, each of the front first portion 14A and the front third portion 14C has a portion 16 within 50 mm from the joint portion 11 (hereinafter referred to as “joint portion vicinity portion 16”), and the front second portion They are provided at a longer pitch than the inclined extension portions 17 arranged at an angle of 35° or more with respect to the width direction x on the 14B side. By forming the front first portion 14A and the front third portion 14C in this way, the vicinity of the edge of the leg opening 4 is pulled toward the joint portion 11 when the diaper is put on, and the diaper 1 is pulled. It is possible to improve fit at the groin while reducing tightening at the groin.

The range of the joint portion neighboring portion 16 and the inclined extension portion 17 of the front first portion 14A and the front third portion 14C is obtained by releasing the joint portion 11 of the front body portion P and the rear body portion Q of the diaper 1. Deployed and defined in a fully extended state. That is, in the state in which the diaper 1 is unfolded in this way, the portion within 50 mm from the joint portion 11 of the front leg elastic member 14 is defined as the joint portion neighboring portion 16, and the front first portion 14A of the front leg elastic member 14 and the front side are attached. A portion of the third portion 14</b>C that is more than 50 mm apart from the joint portion 11 and forms an angle of 35° or more with respect to the width direction x is defined as an inclined extension portion 17 . The angle between the front leg elastic member 14 and the width direction x is determined within the range of 0° to 90°. In the present invention, other lengths and angles of the diaper 1 are also determined with the diaper 1 unfolded in this way.

The pitch of the front leg elastic members 14 is such that, in the existing portion of the front leg elastic member 14, that is, the remaining portion where the front leg elastic member 14 is divided, one side in the width direction x of the diaper 1 is the starting point side and the other side is is the end point side, the starting point side (or the end point side) of all the portions where the front leg elastic members 14 exist is marked, and the marking interval is measured. Each pitch in the joint portion vicinity portion 16 and the inclined extension portion 17 of the front leg elastic member 14 means an average value thereof. The pitch of the rear leg elastic members 15 can also be obtained in the same manner.

The front leg elastic members 14 may be provided continuously or intermittently in the joint vicinity portion 16 . In the former case, the pitch of the front leg elastic members 14 at the joint portion neighboring portions 16 is 50 mm. In order to reduce tightening around the leg openings 4 of the diaper 1, it is preferable that the front leg elastic members 14 are intermittently provided in the joint vicinity 16. As shown in FIG.

The front leg elastic members 14 are preferably intermittently provided at the inclined extension portions 17 . Specifically, the front leg elastic members 14 may be provided at an average pitch of 3 mm to 20 mm at the inclined extension portion 17 of the front first portion 14A and the inclined extension portion 17 of the front third portion 14C. preferable. If the front leg elastic members 14 are provided at such a pitch in the inclined extension portion 17, the groin portion of the diaper 1 is less likely to be tightened, and appropriate rigidity is imparted to the portion. It becomes easier to maintain the shape of the pants. The average pitch of the front leg elastic members 14 in the inclined extension portion 17 is more preferably 4 mm or more, more preferably 5 mm or more, preferably 16 mm or less, and more preferably 12 mm or less.

The front leg elastic members 14 are preferably provided at an average pitch of 4 mm to 30 mm over the entire front first portion 14A and front third portion 14C. The average pitch is more preferably 5 mm or more, more preferably 6 mm or more, more preferably 25 mm or less, still more preferably 20 mm or less, and even more preferably 16 mm or less.

The average pitch of the front first portion 14A and the front third portion 14C is preferably 1.2 times or more, more preferably 1.4 times or more, of the average pitch of the inclined extension portion 17 at the joint vicinity portion 16. Preferably, 1.6 times or more is more preferable.

It is preferable that the front leg elastic member 14 is also intermittently provided by dividing the front second portion 14B at a plurality of locations. This prevents the absorber 10 from being distorted due to the contractile force of the front leg elastic members 14, and improves the fit of the absorber 10 to the crotch area of the wearer. The pitch of the front second portions 14B of the front leg elastic members 14 is not particularly limited. For example, if the pitch of the front second portion 14B of the front leg elastic member 14 is shorter than the pitch of the slanted extensions 17 of the front first portion 14A and the pitch of the slanted extensions 17 of the front third portion 14C, Distortion of the absorber 10 due to the front leg elastic members 14 can be further suppressed. On the other hand, the pitch of the front second portion 14B of the front leg elastic member 14 may be longer than the pitch of the inclined extension portions 17 of the front first portion 14A and the pitch of the inclined extension portions 17 of the front third portion 14C. Well, in this case, the rigidity of the portion where the front leg elastic member 14 of the diaper 1 and the absorbent body 10 overlap can be increased. The front leg elastic members 14 are preferably provided at an average pitch of 3 mm to 30 mm in the front second portion 14B, and the pitch is preferably 4 mm or more, more preferably 5 mm or more, and preferably 25 mm or less, and 20 mm or less. is more preferable, and 16 mm or less is even more preferable.

As a method of providing the front leg elastic members 14 intermittently, for example, after fixing the front leg elastic members 14 to the diaper 1 (especially the exterior member 2) with an adhesive or the like, the front leg elastic members 14 are removed by a cutter blade. , a pressing projection, or the like. At this time, the front leg elastic members 14 are arranged in the joint vicinity portion 16 and the inclined extension portion 17 of the front first portion 14A, and the junction portion vicinity portion 16 and the inclined extension portion of the front second portion 14B and the front third portion 14C. The cutting pitch may be adjusted appropriately according to the portion 17 . For example, when the diaper 1 (especially the outer member 2) is continuously manufactured while being conveyed in the width direction x, the front leg elastic members 14 can be cut using a cutter roll or an embossing roll. The installation intervals of the blades of the roll and the pressing protrusions of the embossing roll are set to the joint portion neighboring portion 16 and the inclined extension portion 17 of the front first portion 14A, the joint portion neighboring portion 16 and the front third portion 14C of the front second portion 14B and the front third portion 14C. The cutting pitch of each portion of the front leg elastic member 14 can be adjusted by appropriately setting according to the inclined extension portion 17 . As will be described later, even when the rear leg elastic members 15 are provided intermittently, the cutting pitch of each portion of the rear leg elastic members 15 can be similarly adjusted.

The front leg elastic members 14 are preferably arranged at both ends of the second front portion 14B at an angle of 30° or less with respect to the width direction x. If the front second portion 14B is arranged in this way, the contractile force of the front leg elastic member 14 (specifically, the portion of the front first portion 14A and the front third portion 14C close to the front second portion 14B is reduced). contraction force), the absorbent body 10 is easily formed to expand in the width direction x. In this case, it is preferable that each of the front first portion 14A and the front third portion 14C is provided at a longer pitch than the inclined extension portion 17 on the front second portion 14B side than the inclined extension portion 17. As a result, the contractile force of the front first portion 14A and the portion of the front third portion 14C near the front second portion 14B is likely to be exerted more strongly.

A plurality of front leg elastic members 14 are preferably arranged side by side on the diaper 1 . In the drawing, two front leg elastic members 14 are arranged side by side, but three or more may be arranged side by side. By arranging a plurality of front leg elastic members 14 side by side and providing them intermittently in this way, the diaper 1 is imparted with appropriate rigidity over a wide range from the edges of the leg openings 4, and the shape of the pants is improved. It becomes easy to be maintained suitably.

In the diaper 1, it is preferable that the rear leg elastic members 15 are intermittently provided so as to be divided at a plurality of locations between the first rear portion 15A and the third rear portion 15C. As a result, tightening of the diaper 1 on the buttocks of the wearer is relieved, and the feeling of wearing the diaper can be improved. In addition, since the rear first portion 15A and the rear third portion 15C are separated at a plurality of locations and provided intermittently, a certain rigidity is imparted to the portions, and the pants shape is preferably maintained. Become so.

It is preferable that the rear first portion 15A and the rear third portion 15C are more strongly tensioned in the vicinity of the joint portion 11 . Specifically, each of the rear first portion 15A and the rear third portion 15C has a portion 18 within 50 mm from the joint portion 11 (hereinafter referred to as a “joint portion vicinity portion 18”). It is preferable that they are provided at a longer pitch than the inclined extension portions 19 arranged at an angle of 35° or more with respect to the width direction x on the second portion 15B side. By forming the rear first portion 15A and the rear third portion 15C in this manner, the inclined extension portion 19 is pulled toward the joint portion 11, thereby reducing tightening of the diaper 1 on the buttocks of the wearer. At the same time, it is possible to enhance the fit to the wearer's buttocks at that portion.

It is preferable that the rear leg elastic members 15 are provided at an average pitch of 3 mm to 20 mm in the inclined extension portion 19 of the rear first portion 15A and the inclined extension portion 19 of the rear third portion 15C. If the rear leg elastic members 15 are provided at such a pitch in the inclined extension portion 19, the tightening of the buttocks of the diaper 1 can be reduced, and appropriate rigidity can be imparted to the relevant portion, so that the diaper 1 can be easily lifted. The shape of the pants can be easily maintained, and the appearance of the diaper 1 when viewed from the rear side can be improved. The average pitch of the rear leg elastic members 15 in the inclined extension portion 19 is more preferably 4 mm or more, more preferably 5 mm or more, preferably 16 mm or less, and more preferably 12 mm or less.

The rear leg elastic members 15 are preferably provided at an average pitch of 4 mm to 30 mm over the entire rear first portion 15A and rear third portion 15C. The average pitch is more preferably 5 mm or more, more preferably 6 mm or more, more preferably 25 mm or less, still more preferably 20 mm or less, and even more preferably 16 mm or less.

In each of the rear first portion 15A and the rear third portion 15C, the average pitch in the joint vicinity portion 18 is preferably 1.2 times or more, more preferably 1.4 times or more, than the average pitch in the inclined extension portion 19. is more preferable, and 1.6 times or more is even more preferable.

The inclined extension portions 19 of the rear first portion 15A and the rear third portion 15C may have a shorter or longer average pitch than the inclined extension portions 17 of the front first portion 14A and the front third portion 14C. may be the same. For example, if the average pitch of the inclined extension portions 17 of the front first portion 14A and the front third portion 14C is longer than the average pitch of the inclination extension portions 19 of the rear first portion 15A and the rear third portion 15C, The fit of the diaper 1 at the groin portion is enhanced, and a gap between the diaper 1 and the wearer's skin is less likely to occur at this portion. On the other hand, if the average pitch of the inclined extensions 19 of the rear first portion 15A and the rear third portion 15C is longer than the average pitch of the inclination extensions 17 of the front first portion 14A and the front third portion 14C, The rigidity of the edges of the leg openings 4 of the diaper 1 at the buttocks is increased, and the edges of the leg openings 4 are less likely to be rolled up at this portion, and the appearance of the diaper 1 when viewed from the rear side can be improved. can.

It is preferable that the rear leg elastic member 15 is also intermittently provided by dividing the rear second portion 15B at a plurality of locations. As a result, the absorber 10 is prevented from being distorted by the contractile force of the rear leg elastic members 15, and the fit of the absorber 10 to the crotch area of the wearer can be improved. The pitch of the rear second portions 15B of the rear leg elastic members 15 is not particularly limited. For example, the pitch of the rear second portion 15B of the rear leg elastic member 15 is greater than the pitch of the inclined extension portion 19 of the rear first portion 15A and the pitch of the inclined extension portion 19 of the rear third portion 15C. If the length is also shorter, the distortion of the absorbent body 10 due to the rear leg elastic member 15 can be further suppressed. On the other hand, the pitch of the rear second portion 15B of the rear leg elastic member 15 is greater than the pitch of the inclined extension portion 19 of the rear first portion 15A and the pitch of the inclined extension portion 19 of the rear third portion 15C. In this case, the rigidity of the portion where the rear leg elastic member 15 of the diaper 1 and the absorbent body 10 overlap can be increased. The rear leg elastic members 15 are preferably provided at an average pitch of 3 mm to 30 mm in the rear second portion 15B, and the pitch is preferably 4 mm or more, more preferably 5 mm or more, and preferably 25 mm or less. 20 mm or less is more preferable, and 16 mm or less is even more preferable.

The rear leg elastic members 15 are preferably arranged at both ends of the rear second portion 15B at an angle of 30° or less with respect to the width direction x. If the rear second portion 15B is arranged in this manner, the contractile force of the rear leg elastic member 15 (specifically, the rear second portion 15A and the rear third portion 15C) is reduced. The contractile force of the portion near the portion 15B) makes it easier to form the absorbent body 10 so as to expand in the width direction x. In this case, the rear first portion 15A and the rear third portion 15C are provided at a longer pitch than the inclined extension portion 19 on the rear second portion 15B side of the inclined extension portion 19, respectively. Preferably, this makes it easier for the portions of the rear first portion 15A and the rear third portion 15C closer to the rear second portion 15B to exert a stronger contractile force.

A plurality of rear leg elastic members 15 are preferably arranged side by side on the diaper 1 . In the drawing, two rear leg elastic members 15 are arranged side by side, but three or more may be arranged side by side. By arranging a plurality of rear leg elastic members 15 side by side and providing them intermittently in this way, the diaper 1 is imparted with appropriate rigidity over a wide range from the edges of the leg openings 4, and is shaped like a pair of pants. It becomes easy to be maintained suitably.

As shown in FIGS. 1 and 2, the diaper 1 is preferably provided with a plurality of trunk elastic members 20 extending in the width direction x on the front trunk P and the rear trunk Q. As shown in FIG. A torso elastic member 20 is provided between the waist opening 3 and the leg openings 4 . The waist elastic member 20 enhances fit around the wearer's waist. Of the torso elastic members 20, elastic members provided at narrow intervals in the front-rear direction y along the edge of the waist opening 3 may be provided as waist elastic members 21, so that the waist elastic members 21 are arranged along the waist of the wearer. A waist gather is formed to prevent leakage of excrement such as urine from the back side or abdomen side. 1 and 2, the waist elastic members 21 are provided at narrower intervals in the front-rear direction y than the trunk elastic members 20 are.

The trunk elastic member 20 and the waist elastic member 21 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 waist elastic member 20 and the waist elastic member 21 are preferably adhered to the inner sheet 5 and/or the outer sheet 6 .

The diaper 1 (especially the outer 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 waist elastic member 21 may be sandwiched between the folded outer sheets 6 and adhered to the outer sheets 6 .

When the front leg elastic member 14 and the rear leg elastic member 15 are provided on the exterior member 2, only the front leg elastic member 14 and the rear leg elastic member 15 are provided in the crotch portion of the exterior member 2 as elastic members. is preferably provided. It is preferable that the trunk elastic member 20 is arranged only on the front trunk P and/or the rear trunk Q.

As each elastic member provided in the diaper 1, an elastic stretchable material such as polyurethane thread, polyurethane film, natural rubber, etc., used for ordinary disposable diapers 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, arranged, and fixed. As the adhesive, it is preferable to use a rubber-based hot-melt adhesive. Note that the magnification is 1.0 in the non-expanded state.

1: Disposable pants-type diaper 2: Exterior member 3: Waist opening 4: Leg opening 5: Inner sheet 6: Outer sheet 7: Absorbent body 8: Top sheet 9: Back sheet 10: Absorbent body 14: Front leg Elastic member 15: rear leg elastic member 16, 18: joint portion vicinity portion 17, 19: inclined extension portion

Claims (8)

Pants having a front body part, a rear body part, and a crotch part positioned between them, and having a waist opening and a pair of leg openings by joining the front side body part and the rear side body part. A shaped disposable pant diaper comprising:
The diaper includes an absorbent body provided in the crotch portion, and a front leg elastic member extending across the crotch portion and along the front edge of the leg opening to the junction of the front and rear torso portions. and a rear leg elastic member extending across the crotch and along the rear edge of the leg opening to the junction of the front body and the rear body; The leg elastic portions are spaced apart from each other in the crotch portion,
The front leg elastic member extends along the edge of the leg opening on one side, and includes a first front portion that does not overlap with the absorbent body, a second front portion that overlaps with the absorbent body, and a leg opening on the other side. a front third portion that extends along the edge and does not overlap with the absorbent body, wherein the front first portion, the front second portion, and the front third portion are divided and intermittently provided at a plurality of locations;
Each of the front first portion and the front third portion is intermittently provided in a portion within 50 mm from the joint portion, and is located on the front second portion side and is 35° or more with respect to the width direction of the diaper. A disposable pants-type diaper characterized by being provided at a longer pitch than the inclined extension portions arranged at an angle of . 2. The disposable pants-type diaper according to claim 1, wherein the front leg elastic members are provided at an average pitch of 3 mm to 20 mm in the inclined extension part of the front first part and the inclined extension part of the front third part. . 3. The disposable pull-on diaper according to claim 1, wherein the front leg elastic members are arranged at both ends of the second front portion at an angle of 30[deg.] or less with respect to the width direction of the diaper. 4. The disposable pants-type diaper according to claim 3 , wherein each of the front first portion and the front third portion is provided at a pitch longer than the inclined extension portion on the front second portion side than the inclined extension portion. The rear leg elastic member extends along the edge of the leg opening on one side, and includes a first rear portion that does not overlap with the absorbent body, a second rear portion that overlaps with the absorbent body, and a leg on the other side. a rear third portion extending along the edge of the opening and not overlapping the absorbent body; The disposable pants-type diaper according to any one of claims 1 to 4 . In the rear leg elastic member, in the rear first portion and the rear third portion, the portion within 50 mm from the joint portion is located on the rear second portion side and is 35 mm in width with respect to the width direction of the diaper. 6. The disposable pants-type diaper according to claim 5 , wherein the pitch is longer than that of the inclined extensions arranged at an angle of 10° or more. 7. The rear leg elastic member according to claim 5 or 6 , wherein the rear leg elastic members are provided at an average pitch of 3 mm to 20 mm in the inclined extension portion of the rear first portion and the inclined extension portion of the rear third portion. disposable pants-type diapers. The disposable pants-type diaper according to any one of claims 5 to 7 , wherein the rear leg elastic members are intermittently provided by dividing the rear second portion at a plurality of locations.

Images