Expanding/contracting structure of absorbent article and manufacturing method therefor

Abstract

The present invention prevents the worsening of an appearance of folding caused by unintended adhesion. An expanding / contracting structure of an absorbent article, said expanding / contracting structure comprising: a first sheet layer (12S) that comprises a nonwoven fabric; a second sheet layer (12H) that comprises a nonwoven fabric and faces one surface of the first sheet layer (12S); and a plurality of long, narrow elastic expanding / contracting members (19) that are provided between the first sheet layer (12S) and the second sheet layer (12H), along an expanding / contracting direction and with gaps between one another, wherein the first sheet layer (12S) and the second sheet layer (12H) have sheet bonding sections (70) that are bonded via a hot melt adhesive that is arranged intermittently in a lengthwise direction of the elastic expanding / contracting members (19), in a pattern of long, narrow stripes extending in a direction that intersects the elastic expanding / contracting members (19), one of the first sheet layer (12S) and the second sheet layer (12H) comprises a spunbond nonwoven fabric and the other comprises an air-through nonwoven fabric, and the air-through nonwoven fabric has a raised nap on a surface that is on the spunbond nonwoven fabric side thereof.

Description

technical field [0001] The present invention relates to a stretchable structure of an absorbent article and a manufacturing method thereof. Background technique [0002] In absorbent articles, stretchable structures are generally provided in order to improve the fit of each part. For example, in shorts-type or belt-type disposable diapers, it is widely adopted that the waist portion is provided with a stretchable structure in the waist direction, and the leg portion is provided with stretchable structures in the direction of the leg circumference. Furthermore, stretchable structures in the front and back directions called three-dimensional barriers or plane barriers are widely provided in pants-type or belt-type disposable diapers, and of course in all absorbent articles including sanitary napkins. [0003] The present applicant proposes the structures described in Patent Documents 1 and 2 as such an expandable and contractible structure of the absorbent article. That is, ...

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Problems solved by technology

[0004] However, if Figure 22 As shown, it is very difficult to stably apply the hot-melt adhesive 72 in a striped pattern that is intermittent in the longitudinal direction of the elastic elastic member 19 and is elongated and continuous in the direction intersecting the elastic elastic member 19. Therefore, there is a problem that the first sheet layer 12S and The second sheet 12H is bonded at the wrinkle-forming portion (the portion between the hot-melt adhesives 72 ) that should not be bonded, so that the wrinkle is crushed or irregularly deformed, resulting in deterioration of aesthetics.

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