JP2001029389A - Disposable pants and method of manufacturing the same - Google Patents

Abstract

(57) [Problem] Disposable pants that can surely prevent lateral leakage of urine and the like from both leg holes, reduce material loss, etc., achieve significant cost reduction, and significantly improve productivity. And a method for producing the same. SOLUTION: An X-shaped leg elastic member 5 is provided between a front waist elastic member 2 (A) and a rear waist elastic member 2 (B).
(A, B) is directly attached, and this leg elastic member 5
An absorption mat member 7 is attached to the inner surface of the intersection of (A, B).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to disposable pants and a method for producing the same.

[0002]

2. Description of the Related Art Conventional disposable pants or disposable diapers have leg holes formed on both sides of a crotch portion between a front abdomen and a back portion of an outer sheet made of a nonwoven fabric, and an absorber is attached to the crotch portion. ing.

[0003] This outer sheet is laminated and adhered to a back sheet and a top sheet. Between these sheets, a waist elastic yarn is attached to the front abdomen and the back, respectively. Elastic yarns for vertical legs are respectively attached to the holes.

[0004]

The leg elastic yarn has a function of preventing the lateral leakage of urine and the like from the leg holes by bringing the peripheral edges of the leg holes into close contact with the wearer. When a large amount of excrement accumulates in the absorber, the crotch of the outer sheet cannot support its weight and shifts downward, and the absorber moves away from the wearer's skin and the elastic yarn for the leg is stretched downward. As a result, there is a problem that the adhesiveness of the peripheral edges of the two leg holes is deteriorated, and the lateral leakage of urine or the like from the two leg holes cannot be effectively prevented.

[0005] In addition, the back sheet and the top sheet of the exterior sheet have to be cut with large holes in both legs, and the back sheet and the top sheet need to be bonded to each other. However, the amount of adhesive increases and the cost increases.

Further, when disposable pants are continuously manufactured side by side, the elastic yarn for the waist of the front abdomen and the back can be added in the horizontal (line) direction, but the elastic yarn for the legs of the leg holes is vertical. There is a problem that productivity must be poor because the speed of the production line must be reduced because it is necessary to add the components in the direction.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is possible to reliably prevent lateral leakage of urine and the like from both leg holes, and to reduce material loss and the like, thereby greatly reducing costs. It is an object of the present invention to provide a disposable pants and a method for manufacturing the same, which can achieve productivity while significantly improving productivity.

[0008]

According to a first aspect of the present invention, an X-shaped leg elastic member is mounted between a front waist elastic member and a rear waist elastic member. An object of the present invention is to provide a disposable pants in which an absorbent mat member is attached to an inner surface of a crossing portion of an elastic member.

According to the first aspect, the X-shaped leg elastic member is directly attached between the front waist elastic member and the rear waist elastic member, and the absorbing mat member is attached to the inner surface of the intersection of the leg elastic members. Since the absorption mat member is directly lifted at the intersection of the X-shaped leg elastic members, even if a large amount of excrement accumulates on the absorption mat member and becomes heavy, the weight of the X-shaped leg elastic member can be reduced. Can support enough.

According to a second aspect of the present invention, when the front waist elastic member and the rear waist elastic member are configured such that a waist elastic yarn is provided between two folded sheet materials, the two sheet materials are used. There is no need to overlap and bond.

According to a third aspect of the present invention, if the leg elastic member has a structure in which a leg elastic yarn is provided between both ends of the folded sheet material, the two sheet materials are overlapped and bonded. There is no need.

According to a fourth aspect of the present invention, when the leg elastic yarn of the leg elastic member is provided only in a portion corresponding to the leg hole, the absorbing mat member is contracted by the leg elastic yarn. Are less likely to be deformed.

According to a fifth aspect of the present invention, the front end and the rear end of the leg elastic member and the absorbing mat member are respectively sandwiched between the folded sheet materials of the front waist elastic member and the rear waist elastic member. With this configuration, each end of the leg elastic member and the absorption mat member is covered with each waist elastic member.

According to a sixth aspect of the present invention, there is provided a pants type in which both sides of the front waist elastic member and the rear waist elastic member are side-sealed, or a front waist elastic member and a rear waist elastic member. The diaper may be of a diaper type in which a fastening tape is attached to one side and the fastening tape is attached to and joined to the other side.

According to an eighth aspect of the present invention, an X-shaped leg elastic member is mounted between a front waist elastic member and a rear waist elastic member, and an absorbent mat member is mounted on an inner surface of the leg elastic member. A method for continuously manufacturing pants in a side-by-side manner, in which a sheet material for a waist elastic member in an unfolded state is cut in a width direction while being supplied in a length direction, and the cut front sheet material and rear sheet material are front-cut. A waist manufacturing process in which an elastic yarn for waist is attached to each inner surface and an adhesive is applied while being spread to the interval between the waist position and the rear waist position, and a sheet material for the leg elastic member in an unfolded state is supplied in a length direction. A leg bullet which has an adhesive applied only to the portions corresponding to the leg holes on the inner surfaces of both ends while expanding the cut first sheet material and the second sheet material at a predetermined interval while cutting in the width direction. A first leg elastic member and a second leg are cut by cutting a first sheet material and a second sheet material to a predetermined length after attaching both ends and bending each end portion to adhere to each leg elastic yarn. A leg manufacturing step of forming an elastic member, and both end portions of the first leg elastic member are adhered to respective inner surfaces of the front sheet material and the rear sheet material in a waist manufacturing step in an oblique state, and are attached to the first leg elastic member. After bonding both end portions of the second leg elastic member to the inner surfaces of the front sheet material and the rear sheet material in the waist manufacturing process so as to be X-shaped, the first leg elastic member and the second leg elastic member are bonded to each other. The crossing portions of the leg elastic members are joined, and the absorbing mat member is joined to the inner surfaces of the first leg elastic member and the second leg elastic member, and the front sheet material and the rear sheet material are joined to each other. Sandwich the front and rear ends A front waist elastic member and a rear waist elastic member are formed by folding and bonding each of them while watching, and a front waist elastic member is formed at an intersection of the first leg elastic member and the second leg elastic member. And a waist leg assembling step of superimposing a back waist elastic member, joining both sides thereof, and cutting an intermediate portion of the joined portion. .

According to the eighth aspect, the sheet material for the waist elastic member and the elastic yarn for the waist, and the sheet material for the leg elastic member and the elastic yarn for the leg are respectively sent out in the lateral direction, so that the front waist elastic member and the rear waist elastic member are sent. An X-shaped leg elastic member is attached between the leg elastic members, and disposable pants having an absorbent mat member attached to the inner surface of the leg elastic member can be manufactured side by side continuously.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 6 is a system diagram of a production facility line for disposable pants, and the production method will be described with reference to the production process diagrams of FIGS. 1 and 2. Steps S1 to S in FIG.
19 correspond to steps S1 to S19 in FIGS. 1 and 2, respectively.

(1) Waist Manufacturing Step In the first step S1, the unfolded waist elastic member sheet material 1 is wound into a roll and has a length (line).
It is supplied continuously while being pulled out in the direction L.
The width W1 of the waist elastic member sheet 1 is determined by a front waist elastic member 2 (A) and a rear waist elastic member 2 described later.
The width is set to four times the width W2 of (B) (see S19 in FIG. 1). The sheet material 1 for a waist elastic member is a synthetic resin fiber non-woven fabric or a synthetic resin film, and a water-repellent (waterproof) or liquid-permeable (moisture-permeable) material is appropriately selected and used.

In the second step S2, the waist elastic member sheet material 1 is cut in the width direction by a slitter 10 to be divided into a front sheet material 1 (A) and a rear sheet material 1 (B). The front sheet material 1 (A) and the rear sheet material 1 (B)
Is twice as large as each width W2 (see S19 in FIG. 1) of a front waist elastic member 2 (A) and a rear waist elastic member 2 (B) described later.

In a third step S3, the cut front sheet material 1 (A) and rear sheet material 1 (B) are separated by a separator 1
By 1, the distance is increased to the distance between the front waist position and the rear waist position.

In the fourth step S4, each sheet material 1
Elastic yarn 3 for waist provided corresponding to (A, B)
A plurality of waist elastic yarns 3 from the roll (A, B)
While pulling out (A, B) in the length direction L, the front sheet material 1
(A) and each inner surface of the rear sheet material 1 (B) are attached in an extended state.

In the fifth step S5, the spreader 12
Thereby, an adhesive (see dots in FIG. 1) is applied to each inner surface of the front sheet material 1 (A) and the rear sheet material 1 (B). With this adhesive, each waist elastic thread 3 (A, B) is adhered to the inner surface of each sheet material 1 (A, B) in an extended state.

(2) Leg Manufacturing Step In the sixth step S6, the sheet material 4 for the leg elastic member in the unfolded state is wound in a roll shape, and is continuously supplied while being pulled out in the length direction L. The width W4 of the leg elastic member sheet material 4 is two times the width W5 of each leg elastic member 5 (A, B) described later (see S19 in FIG. 1).
In addition to the fold, it is set wider by the amount of bending at both ends. The leg elastic member sheet material 4 is a synthetic resin fiber nonwoven fabric or a synthetic resin film, and a water-repellent (waterproof) or liquid-permeable (moisture-permeable) material is appropriately selected and used.

In a seventh step S7, the leg elastic member sheet material 4 is cut in the width direction by a slitter 13 to form a first sheet material 4 (A) and a second sheet material 4 (B).
To divide. The first sheet material 4 (A) and the second sheet material 4
The width W6 of (B) is the first leg elastic member 5 described later.
(A) and each width W5 of the second leg elastic member 5 (B) (FIG. 1)
(See step S19).

In an eighth step S8, the cut first sheet material 4 (A) and second sheet material 4 (B) are spread at a predetermined interval by the separator 14.

In the ninth step S9, each sheet material 4
The elastic yarns 6 for legs (A, B) corresponding to (A, B)
While the respective elastic yarns 6 (A to D) for the legs are pulled out in the length direction L from the rolls (D) to (D), the adhesive is applied only to the portions corresponding to the leg holes by the spreader 15.

Specifically, as shown in FIG. 2, the leg elastic yarn 6A attached to the outside of the first sheet material 4 (A) is
The first sheet material 4 is applied to the front side in the pull-out direction with a length of about の of the leg elastic member 5 (A) (see a chain line portion a).
The elastic yarn 6B for the leg attached to the inside of (A) is applied to the rear side in the pull-out direction with a length of about の of the leg elastic member 5 (A) (see a chain line portion b).

The leg elastic yarn 6 (C) attached to the outside of the second sheet material 4 (B) is connected to the leg elastic member 5.
The leg elastic yarn 6 (D) which is applied to the front side in the pull-out direction with a length of about （of that of (B) (see a chain line portion c) and attached inside the second sheet material 4 (B) is Leg elastic member 5
It is applied to the rear side in the pull-out direction with a length of about の of (B) (see a chain line portion d).

In a tenth step S10, as shown in FIG. 3, both ends 4a of the first sheet material 4 (A) and the second sheet material 4 (B) are bent upward, and the elastic yarn 6 for each leg is formed. (A to D). Thereby, each leg elastic thread 6 (A to D) is connected to both ends 4 of each sheet material 4 (A, B).
a is adhered in an extended state to the inner surface thereof.

In an eleventh step S11, the first sheet material 4 (A) and the second sheet material 4 (B) are cut obliquely at a predetermined length by a cutter 16 to form a first leg elastic member 5 ( A) and the second leg elastic member 5 (B) are formed.

By this cutting, each leg elastic yarn 6 (A
To D) are also cut at the same time, and the non-bonded part shrinks. As a result, as shown in FIG.
On the outside of the leg elastic member 5 (A), there is provided a leg elastic thread 6.
(A) is provided only on the front side in the pulling-out direction (see the chain line portion a), and the elastic yarn for leg 6 (B) is provided only on the rear side in the drawing-out direction outside the first leg elastic member 5 (A). (See the chain line portion b) and the second leg elastic member 5
A leg elastic thread 6 (C) is attached to the outside of (B) only on the front side in the drawing direction (see a chain line portion c), and a leg elastic thread 6 (C) is placed inside the second leg elastic member 5 (B). (D)
Is provided only on the rear side in the pull-out direction (see the chain line portion d).

(3) Waist leg assembling step In the twelfth step S12, the first leg elastic member 5
(A) is tilted at about 45 degrees by the reversing device 17, and both ends of the first leg elastic member 5 (A) are connected to the front sheet material 1 (A) and the rear sheet material 1 (B) in the fifth step S5. Is adhered diagonally to each inner surface of

In the thirteenth step S13, the second leg elastic member 5 (B) is inclined at about 45 degrees by the reversing device 17 so as to be X-shaped with respect to the first leg elastic member 5 (A). The both ends of the two-leg elastic member 5 (B) are subjected to a fifth step S
5 is adhered to each inner surface of the front sheet material 1 (A) and the rear sheet material 1 (B) in an oblique state (see FIG. 4 (c)).

In a fourteenth step S14, the intersection of the first leg elastic member 6 (A) and the second leg elastic member 6 (B) is joined by a heat seal 18 in a rhombic shape h (FIG. 4).
(See cross hatching in (c)). Thus, the intersection between the first leg elastic member 6 (A) and the second leg elastic member 6 (B) does not shift or separate.

In a fifteenth step S15, the absorbent mat member 7 with a waterproof film is joined to the inner surfaces of the first leg elastic member and the second leg elastic member. When joining,
First leg elastic member 6 (A) and second leg elastic member 6
It is preferable to apply an adhesive to an appropriate position on the inner surface of (B) or the back surface of the absorption mat member 7 (see FIG. 5A).

In the sixteenth step S16, the front sheet material 1
(A) and the rear sheet material 1 (B) are folded and bonded to each other while sandwiching the front end and the rear end of the absorbent mat member 7. At this time, the front end and the rear end of the leg elastic members 5 (A, B) are also sandwiched. This allows
Front waist elastic member 2 (A) and rear waist elastic member 2
(B) is formed.

In the seventeenth step S17, the front waist elastic member 2 (A) is folded by the two-folding device 19 at the intersection of the first leg elastic member 5 (A) and the second leg elastic member 5 (B). And the rear waist elastic member 2 (B).

In an eighteenth step S18, both sides 2a of the front waist elastic member 2 (A) and the rear waist elastic member 2 (B) are joined (side-sealed) by the heat seal 20.

In a nineteenth step S19, the cutter 21
Front waist elastic member 2 (A) and rear waist elastic member 2
(B) The middle of the joining portion of both side portions 2a is cut.

By these steps S1 to S19, the front waist elastic member 2 (A) and the rear waist elastic member 2 (B)
An X-shaped leg elastic member 5 (A, B) is attached between them, and disposable pants 8 having an absorbent mat member 7 attached to the inner surface of the leg elastic member 5 (A, B) are arranged side by side and continuously. (See FIG. 5C).

In the manufacturing process of the disposable pants 8 described above, a pants type in which both sides 2a of the front waist elastic member 2 (A) and the rear waist elastic member 2 (B) are joined (side-sealed), A diaper type in which a fastening tape is attached to both sides 2a of the rear waist elastic member 2 (B), and this fastening tape is attached to and joined to both sides of the front waist elastic member 2 (A) can also be used.

The disposable pants 8 manufactured as described above have an X-shaped leg elastic member 5 (A, B) between the front waist elastic member 2 (A) and the rear waist elastic member 2 (B).
Is directly attached, and the absorption mat member 7 is attached to the inner surface of the intersection of the leg elastic members 5 (A, B). Therefore, the absorption mat is formed at the intersection of the X-shaped leg elastic members 5 (A, B). Since the member 7 is directly lifted, even if a large amount of excrement accumulates in the absorption mat member 7 and becomes heavy, the X-shaped leg elastic members 5 (A, B) can sufficiently support the weight.

Therefore, since the absorbent mat member 7 does not separate from the wearer's skin, the adhesion is improved, and urine from both leg holes formed on both sides of the X-shaped leg elastic members 5 (A, B). , Etc., can be reliably prevented.
The triangular gap formed between each waist elastic member 2 (A, B) and the X-shaped leg elastic member 5 (A, B) has an absorbing mat member 7 for preventing leakage of urine and the like. It is preferable to completely close with. It should be noted that the X-shaped leg elastic members 5 (A, B) may be formed in an X-shape in which the intersecting portion is shifted to the front side. In this case, the front abdomen is shallow and the back is deep, so that the fit feeling is improved.

Further, since the X-shaped leg elastic members 5 (A, B) are directly mounted between the front waist elastic member 2 (A) and the rear waist elastic member 2 (B), as in the prior art. There is no need to cut large leg holes in the exterior sheet (back sheet and top sheet), and there is no need to bond the entire surface, so material loss and the amount of adhesive used are reduced, resulting in significant cost reduction. become.

Further, when the both sides 2a of the front waist elastic member 2 (A) and the rear waist elastic member 2 (B) are joined by heat sealing, the number of laminated sheets is small. The sheet material 1 (A, B only) can be easily heat-sealed, the number of laminated sheets is small, and the amount of adhesive used is small, so that the feeling of stiffness is reduced and disposable pants for incontinence (or disposable). In addition to the diaper 8, it can be used as a disposable pants for travel.

The front waist elastic member 2 (A) and the rear waist elastic member 2 (B) are formed by folding the sheet material 1 into two.
Since the waist elastic yarns 3 (A, B) are additionally provided between (A, B), there is no need to superimpose and bond two sheet materials, so that the production becomes easy and each waist is formed. Since the upper end of the elastic member 2 (A, B) is not left uncut, the feel is improved and the appearance is improved.

Further, each leg elastic member 5 (A, B)
Since the leg elastic yarns 6 (A, B) are respectively provided between both ends of the folded sheet material 4 (A, B), there is no need to overlap and bond two sheet materials. Therefore, manufacturing becomes easy. In addition, each leg elastic member 5 (A,
Since both ends of B) are not cut off, the feel is improved, and the frill-like villain feeling is eliminated, so that the appearance is improved by being close to cloth pants.

The leg elastic yarns 6 (A, B) of each of the leg elastic members 5 (A, B) are attached only to the portions corresponding to the leg holes, so that the leg elastic yarns 6 (A, B) are provided. Since the absorbing mat member 7 is less likely to be deformed by the contraction force of A and B), the adhesiveness to the wearer is maintained.

Further, the front end and the rear end of the leg elastic members 5 (A, B) and the absorbent mat member 7 are folded into two, a front waist elastic member 2 (A) and a rear waist elastic member 2 (B). Since each leg elastic member 5 (A, B) is sandwiched between the sheet materials 1 (A, B), each end of each leg elastic member 5 (A, B) and the absorption mat member 7 is covered with each waist elastic member 2 (A, B). So that the skin feels good.

[0051]

As is apparent from the above description, in the disposable pants according to the first aspect of the present invention, the X-shaped leg elastic member is directly attached between the front waist elastic member and the rear waist elastic member. Since the absorption mat member is attached to the inner surface of the intersection of the leg elastic members, the absorption mat member is directly lifted at the intersection of the X-shaped leg elastic members, so that a large amount of excrement accumulates in the absorption mat member. Even if it becomes heavy, the weight can be sufficiently supported by the X-shaped leg elastic member.

Therefore, since the absorbent mat member does not separate from the wearer's skin, the adhesiveness is improved and lateral leakage of urine and the like from both leg holes can be reliably prevented.

Further, since the X-shaped leg elastic member is directly attached between the front waist elastic member and the rear waist elastic member, the large leg holes are formed in the exterior sheet (back sheet and top sheet) as in the prior art. Since there is no need to cut the part and the necessity of full-surface bonding is eliminated, the loss of the material and the amount of the adhesive used are reduced, and the cost can be significantly reduced.

Further, when the both sides of the front waist elastic member and the rear waist elastic member are joined by heat sealing, heat sealing can be easily performed since the number of laminated sheets is small, and the number of laminated sheets is small. Since the amount of the adhesive used is small, the feeling of stiffness is reduced, so that the adhesive can be used not only as disposable incontinence pants (or disposable diapers) but also as travel disposable pants.

According to a second aspect of the present invention, the front waist elastic member and the rear waist elastic member have a structure in which a waist elastic yarn is provided between two folded sheet materials, and two sheet materials are used. Since there is no need to overlap and adhere, manufacture becomes easy. In addition, since the upper end of each waist elastic member is not left uncut, the feel is improved and the appearance is improved.

According to a third aspect of the present invention, if the leg elastic member has a configuration in which a leg elastic yarn is provided between both ends of the folded sheet material, the two sheet materials are overlapped and bonded. Since the necessity is eliminated, manufacturing becomes easy. In addition, since both ends of each leg elastic member are not left uncut, the feel is improved, and the frill-like villain feeling is eliminated.

According to a fourth aspect of the present invention, when the leg elastic yarn of the leg elastic member is provided only at a portion corresponding to the leg hole, the absorbing mat member is contracted by the leg elastic yarn. Is not easily deformed, so that the adhesion to the wearer is maintained.

As described in claim 5, the front end and the rear end of the leg elastic member and the absorbing mat member are respectively sandwiched between the folded two sheet materials of the front waist elastic member and the rear waist elastic member. With such a configuration, each end of the leg elastic member and the absorption mat member is covered with each waist elastic member, so that the feel becomes good.

The disposable pants may be of a pants type in which both sides are side-sealed as in claim 6, or a diaper type in which a fastening tape is attached as in claim 7.

In the method for manufacturing disposable pants according to claim 8 of the present invention, the sheet material for the waist elastic member and the elastic yarn for the waist, and the sheet material for the leg elastic member and the elastic yarn for the leg are each sent out in the lateral direction, so that An X-shaped leg elastic member is attached between the waist elastic member and the rear waist elastic member, and disposable pants in which an absorbing mat member is attached to the inner surface of the leg elastic member can be continuously manufactured side by side. Become.

Accordingly, the elastic yarn for the waist and the elastic yarn for the leg can be added in the horizontal direction, so that it is not necessary to reduce the speed of the production line, and the productivity is remarkably improved.

[Brief description of the drawings]

FIG. 1 is a view showing a process of manufacturing a waist and assembling a waist leg.

FIG. 2 is a view showing a leg manufacturing process.

FIG. 3A is a sectional view corresponding to AA in FIG. 3,
FIG. 4B is a cross-sectional view corresponding to BB in FIG. 3.

FIG. 4A is a plan view of a first leg elastic member,
(B) is a plan view of a second leg elastic member, and (c) is a plan view of both leg elastic members joined in an X-shape.

5A is a plan view of disposable pants corresponding to a fifteenth step, and FIG. 5B is a plan view of disposable pants corresponding to a nineteenth step.

FIG. 6 is a system diagram of a production facility line for disposable pants.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet material for waist elastic member 1 (A) front sheet material 1 (B) rear sheet material 2 (A) front waist elastic member 2 (B) rear waist elastic member 3 (A, B) waist elastic yarn 4 leg elastic member Sheet 4 (A) 1st sheet material 4 (B) 2nd sheet material 5 (A) 1st leg elastic member 5 (B) 2nd leg elastic member 6 (AD) Leg elastic yarn 7 Absorption mat member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A61F 13/54

Claims (8)

[Claims] 1. An X-shaped leg elastic member is mounted between a front waist elastic member and a rear waist elastic member, and an absorbing mat member is mounted on an inner surface of an intersection of the leg elastic members. Disposable pants. 2. The disposable pants according to claim 1, wherein the front waist elastic member and the rear waist elastic member have a waist elastic thread provided between two folded sheet materials. 3. The disposable pants according to claim 1, wherein the leg elastic member has a leg elastic thread provided between both ends of the folded sheet material. 4. The disposable pants according to claim 3, wherein the leg elastic yarn of the leg elastic member is provided only in a portion corresponding to the leg hole. 5. A front end portion and a rear end portion of the leg elastic member and the absorbent mat member are respectively sandwiched between each folded sheet material of the front waist elastic member and the rear waist elastic member. Item 5. Disposable pants according to any one of Items 4. 6. The disposable pants according to claim 1, wherein both sides of the front waist elastic member and the rear waist elastic member are side-sealed. 7. A diaper type wherein a fastening tape is attached to one of both sides of the front waist elastic member and the rear waist elastic member, and the fastening tape is attached to and joined to the other two sides. The disposable pants according to claim 5. 8. A disposable pants having an X-shaped leg elastic member attached between a front waist elastic member and a rear waist elastic member, and an absorbent mat member attached to an inner surface of the leg elastic member. A sheet material for a waist elastic member in an expanded state is cut in the width direction while being supplied in the length direction, and the cut front sheet material and rear sheet material are cut into a front waist position and a rear waist position. A waist manufacturing process in which an elastic yarn for waist is attached to each inner surface while spreading at an interval and an adhesive is applied, and a sheet material for a leg elastic member in an unfolded state is cut in a width direction while being supplied in a length direction. Then, while expanding the cut first sheet material and second sheet material at a predetermined interval, an elastic yarn for a leg in which an adhesive is applied only to a portion corresponding to a leg hole is added to the inner surface of each end portion. ,each A leg manufacturing method in which the first sheet material and the second sheet material are cut to a predetermined length to form a first leg elastic member and a second leg elastic member after bending an end portion to adhere to each leg elastic yarn. And bonding both end portions of the first leg elastic member to the inner surfaces of the front sheet material and the rear sheet material in the waist manufacturing process in an oblique state, and forming an X-shape with the first leg elastic member. After bonding both ends of the second leg elastic member to the respective inner surfaces of the front sheet material and the rear sheet material in the waist manufacturing process in an oblique state, the intersection of the first leg elastic member and the second leg elastic member is joined. Then, the absorption mat member is joined to the inner surfaces of the first leg elastic member and the second leg elastic member,
A front waist elastic member and a rear waist elastic member are formed by folding and bonding the front sheet material and the rear sheet material in two while sandwiching the front end portion and the rear end portion of each leg elastic member and the absorbing mat member. The front waist elastic member and the rear waist elastic member are overlapped with each other at the intersection of the first leg elastic member and the second leg elastic member,
And a waist leg assembling step of joining both sides thereof and cutting an intermediate portion of the joined portion.