JPH0767475B2 - Method of manufacturing worn article - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a disposable diaper, a disposable diaper cover, a method for manufacturing a wearing article similar to these, and more specifically,
The present invention relates to a method for forming side flaps which should be provided on the opposite sides of the side flaps and for attaching elastic members for leg enclosing thereto.

[Conventional technology]

Conventionally, for example, in a disposable diaper, a side flap having high flexibility is formed on the opposite side of the disposable diaper, and an elastic member for leg enclosing is attached to the side flap. And this is the mainstream in practice.

Generally, such known diaper side flaps are formed of portions of the topsheet and backsheet that cover the front and back surfaces of the absorbent core and extend outwardly from opposite side edges of the core, i.e., continuous. It is formed by each one of the sheets.

[Problems to be solved by the invention]

However, in the case of articles such as disposable diapers to be mass-produced at high speed, when the side flaps are formed of the top sheet and the back sheet, for example, the following problems cannot be solved.

a) A side flap made of a material different from that of the top sheet and / or the back sheet, for example, a side flap made of a material having better air permeability than the back sheet cannot be formed to enhance the effect of preventing stuffiness inside the article.

b) In order to ensure that the side flaps fit and adhere to the leg circumference when the article is worn and that the side flaps completely receive the discharged matter, for example, when the side flaps are provided with a special structure, these It is practically difficult to simultaneously form work on the product manufacturing line at the same time as the product main body,
Even if it could be done, it would be unsuitable for disposable articles that require high speed production.

c) When the width of the side flaps, the facing distance of the elastic members, etc. are changed to desired states in the front side portion and the rear side portion of the article, the same as in the above item b) can be said.

Therefore, the present invention is a method for manufacturing a worn article such as a disposable diaper that can solve the above problems by forming a part of the side flap separately from the article main body and joining the two on the production line. To provide.

[Means for solving problems]

The present invention relates to an absorbent core, a water-permeable topsheet that covers at least the upper surface and the opposite side surface of the core, and a water-impermeable backsheet that covers the lower surface of the core and extends outward from the opposite side edge of the core. A second side flap having an elastic member for surrounding the leg attached to the outer edge of the article main body is formed separately from the main body, and the second side flap has the second side flap on which the elastic member is located. By joining the inner portion of the second side flap and the longitudinally opposed end portion to the upper surface of the first side flap in a state in which the outer edges of the side flaps face each other outward, the second side flap of the second side flap is joined. The longitudinally opposite ends are fixed by falling outward, and the second side flap portions between the longitudinally opposite ends are made to stand up by the contraction action of the elastic member. Some to the formed cut to the concave portion of the outer portion to the method of manufacturing a wearing article according to claim.

〔Example〕

Taking a disposable diaper as an example and referring to the drawings, an example of the present invention will be described as follows.

As shown in FIGS. 1 to 3, an elastic member 2 for waist enclosing is provided on the upper surface of the central portion of the longitudinally opposite ends of the water-impermeable back sheet 1.
Is preferably attached via an adhesive, and the absorbent core 3 is superposed on the upper surface of the backsheet 1 between the opposing elastic members 2 preferably via an adhesive, and the water-permeable topsheet 4 is attached.
Then, the elastic member 2 and the core 3 are covered, preferably with an adhesive. Thus, the diaper main body 6 having the first side flap 5 extending outward from the opposite side edge of the core 3 is formed.

On the other hand, as shown in FIG. 4, the second side flap 7 is formed separately from the main body 6 from an impermeable sheet having a width considerably smaller than that of the back sheet 1. The second side flap 7 is attached to one side of the flap (sheet) 7 with an elastic member 8 for leg enclosing preferably via an adhesive, and a side edge 9 of the second side flap 7 is folded back to be wrapped. Thus, the formation of the second side flap 7 is completed.

As shown in FIGS. 5 and 6, with the outer edge of the second side iflap 7 on which the elastic member 8 is positioned facing outward, the inner portion and the longitudinally opposed end portion 10 of the first side of the main body 6 are It is joined to the upper surface of the side flap 5 preferably with an adhesive (see FIGS. 7 to 9). After this joining, the outer portion 12 is cut along the line 11 at a position outside the outer edge of the first side flap 5 to form a recessed portion that fits and fits the shape of the first side flap 5 to the body. .

Further, the tape fastener 13 is attached to the side of the first side flap 5 opposite to the one longitudinal end thereof. However, if the opposite side edges of the first side flap 5 and the second side flap 7 are aligned, they are attached to both.

The back sheet 1 is a breathable plastic film, a laminated sheet of the film and a non-woven fabric, the elastic members 2 and 8 are polyurethane foam, rubber, a plastic film which is shrinkable by heat treatment, and the top sheet 4 is For the second side flap 7, such as a nonwoven fabric or a porous plastic film, a breathable plastic film, a laminated sheet of the film and the nonwoven fabric, a water-repellent treated nonwoven fabric, or the like is used.

As the second side flap 7, a laminated sheet of a plastic film and a non-woven fabric is used, and when the front and back surfaces of the flap have good or bad texture, the one having good texture, for example, the non-woven fabric is used as a skin contact surface. Located in.

In the illustrated example, both second side flaps 7 located on the opposite side
Are joined at equal intervals through the front, crotch, and rear parts of the diaper, but may be joined, for example, so that the interval becomes wider from the front part to the rear part. In this case, the elastic member 8 located on the opposite side of the diaper
Since the interval of becomes wider from the front side portion to the rear side portion,
The elastic member 8 can be pressed against the wearer's wide buttocks at wide intervals.

In addition, although the elastic member 2 for waist envelopment is not required to be attached in the present invention, as in the illustrated example, it is aligned with the longitudinally opposite end edges of the backsheet 1 and the topsheet 4. It is better to attach it. In the production of diapers, backsheet 1 and topsheet 4
Is continuously supplied in the direction of the production line and cut into individual diapers at the completion of the diaper. Therefore, if this is attached so that the center line of the double-width elastic member 2 is located on the cutting line. This is because the width of the elastic member is divided into two parts, one of which is distributed to one diaper and the other of which is distributed to the other diaper, which improves the mounting efficiency of the elastic member.

In addition, the opposite side of the top sheet 4 may be wound around the lower surface of the opposite side of the core 3 in some cases.

The diaper formed as described above, when the elastic member 8 is contracted, as shown in FIGS. 7 to 9,
The second side flap 7 stands up except for its longitudinally opposed ends 10. However, as shown in FIG. 6, since the diaper is pulled in the vertical direction, when the elastic member 8 is sufficiently extended, the outer central portion 7a falls down to the outside. Therefore, also when the elastic member 8 is stretched to some extent,
The outside central portion 7a is inclined at an angle to the outside without completely lying down. The outer central portion 7a thus rises, falls, or inclines depending on the degree of extension of the elastic member 8 in that the outer edge where the elastic member 8 is located is directed outward, and the longitudinally opposed end portion 11 thereof is Is fixed. The function of the second side flap 7 is such that the second side flap 7 fits tightly to the wearer's leg circumference and is not released from the wearer's leg circumference even if the wearer freely moves, and leaks from the waste leg circumference. It is extremely effective in preventing

(Effect of the invention) According to the present invention, as described above, the article main body and the second side flap that is a part of the side flap to be provided on the opposite side thereof and to which the elastic member is attached are separately formed,
Since the latter is joined to the former, the problems a), b), and c) described in the section [Problems to be solved by the invention] can be solved. That is, when the side flaps are formed in the extended portion of the article-based topsheet and / or backsheet, the former and the latter are naturally the same in performance such as breathability, but are more breathable than the former. By using a sheet made of an excellent material for the second side flap, the effect of preventing stuffiness inside the article can be enhanced. Also, by attaching an elastic member to the outer edge of the second side flap and fixing the longitudinally opposed end portion where the elastic member is located, the outer central portion can be undulated and tilted. Can be formed relatively easily. Further, it is preferable that the facing distance between the elastic members for enclosing the legs of the article is wider at the rear portion than at the front portion in order to improve the conforming adhesion to the body, and this is for the first side flap mainly of the article. It is possible to form such a side flap relatively easily, although it can be obtained depending on the bonding distance and angle of the second side flap. Therefore, according to the present invention, the high speed productivity is not deteriorated even though the article having the side flap having such a relatively special structure is manufactured.

[Brief description of drawings]

1 to 5 are plan views of a process for forming a disposable diaper showing an embodiment of the present invention, FIG. 6 is a plan view of a completed diaper, FIG. 7 is a perspective view of the completed diaper, and FIG. FIG. 9 is a cross-sectional view of the completed diaper, and FIG. 9 is a partial perspective view of the side flap portion of the completed diaper. 1 ... Top sheet, 3 ... Core 4 ... Top sheet, 5 ... First side flap, 6 ...
… Mainly article, 7 …… Second side flap, 8 …… Elastic member, 10 …… Vertical end 13… Tape fastener

Claims (1)

[Claims] 1. An absorbent core, a water-permeable topsheet that covers at least the upper surface and the opposite side surface of the core, and a water-impermeable bag that covers the lower surface of the core and extends outward from the opposite side edge of the core. The article main body having a sheet is formed, and a second side flap having an elastic member for enclosing legs attached to an outer edge is formed separately from the main body, and the second side flap is formed on the elastic member. The second side flap is joined to the upper surface of the first side flap so that the outer edge of the second side flap faces outward, and the inner side portion of the second side flap is joined to the upper surface of the first side flap. The longitudinally opposite ends of the flaps are tilted outward and fixed, and the second side flaps between the longitudinally opposite ends are erected by the contracting action of the elastic member.
A method for manufacturing a worn article, comprising cutting an outer portion of the first side flap to form a recessed portion.