CN-121971240-A - Stretchable member and disposable wearing article having the same

Abstract

The invention provides a stretchable member and a disposable wearing article having the stretchable member. The elastic sheet (30) is interposed between a 1 st sheet (20A) and a 2 nd sheet (20B) of nonwoven fabric, the 1 st sheet (20A) and the 2 nd sheet (20B) are welded together at a plurality of sheet joint portions (40) arranged at intervals through joint holes (31) penetrating the elastic sheet (30), the regions having the elastic sheet elastic structure (20X) have sheet joint portions (40) having different shapes, and the reference diameter is joined to all the sheet joint portions (40) in the region having the elastic sheet elastic structure (20X) ) The joint reference diameter is more than 0.2mm ) Is 1 to 3 times the minimum value, and the circumference is 1 to 15 times the circumferential length of a circle having a diameter as the joining reference diameter.

Inventors

• SAKAI TOSHIHIRO

Assignees

• 大王制纸株式会社

Dates

Publication Date

20260505

Application Date

20180925

Priority Date

20170927

Claims (4)

1. 1. A telescopic component is characterized in that, The elastic sheet is interposed between a1 st sheet layer made of a nonwoven fabric and a 2 nd sheet layer made of a nonwoven fabric, the 1 st sheet layer and the 2 nd sheet layer are joined together by passing through a joint Kong Rongjie penetrating the elastic sheet at a plurality of sheet joining portions arranged at intervals, The region having the elastic sheet stretchable structure has a stretchable region which is contracted in a stretchable direction by contraction of the elastic sheet and is stretchable in the stretchable direction, In the expansion and contraction region, the elastic piece is continuous in the expansion and contraction direction, but does not have a portion that is continuous in a straight line along the expansion and contraction direction due to the presence of the engagement hole.
2. 2. A telescopic member according to claim 1, wherein, In the expansion and contraction region, a gap remains between the engagement hole and the sheet engagement portion in a natural length state.
3. 3. A telescopic member according to claim 1 or 2, wherein, The expansion and contraction region is a region formed by a partially continuous non-joined tape having no sheet joined portion in an expanded state in a slanted lattice shape, The oblique lattice-shaped non-joined tape is composed of a1 st non-joined tape that is linearly continuous in a1 st direction crossing the expansion and contraction direction at an acute angle and repeatedly exists at intervals in a direction perpendicular to the 1 st direction, and a 2 nd non-joined tape that is linearly continuous in a 2 nd direction crossing the expansion and contraction direction at an acute angle other than the 1 st direction and repeatedly exists at intervals in a direction perpendicular to the 2 nd direction, The sheet engaging portions are arranged between adjacent 1 st non-engaging strips at intervals in the 1 st direction, and the sheet engaging portions are arranged between adjacent 2 nd non-engaging strips at intervals in the 2 nd direction, The positive and negative of the inclination of the 1 st direction and the 2 nd direction with respect to the telescoping direction are opposite to each other, In the expanded state of the expansion/contraction region, the acute-angle-side intersection angles of the 1 st direction and the 2 nd direction with respect to the expansion/contraction direction are respectively greater than 0 degrees and 45 degrees or less.
4. 4. A disposable wearing article, characterized in that, The disposable wearing article is a pants-type disposable wearing article comprising an outer body integrally formed from a front body portion to a rear body portion or an outer body provided in the front body portion and the rear body portion, respectively, an inner body attached to a widthwise intermediate portion of the outer body and extending over front and rear sides of a crotch portion, side seal portions formed by joining together both side portions of the outer body in the front body portion and both side portions of the outer body in the rear body portion, respectively, and a waist opening and a pair of left and right leg openings, The outer body of the front body portion and the outer body of the rear body portion are stretchable members each having the elastic sheet stretchable structure of claim 1 extending between the side seals in the width direction, and the stretchable direction of the stretchable region of the elastic sheet stretchable structure is the width direction.

Description

Stretchable member and disposable wearing article having the same The present application is a divisional application of chinese application patent application having application date of 2018, 09/25, entitled "stretchable member, disposable wearing article having the stretchable member, and method of manufacturing the stretchable member", and application No. 201880045667.X (PCT/JP 2018/035311). Technical Field The present invention relates to a stretchable member having a stretchable structure in which an elastic sheet such as an elastic film is sandwiched between a1 st sheet and a 2 nd sheet, and a disposable wearing article having the stretchable member. Background In order to improve the fit to the body surface, a disposable wearing article such as a disposable diaper is generally provided with stretchability in an appropriate region such as a leg band or a waist band. As a method for imparting stretchability, a method of attaching an elongated elastic member such as a rubber string in a state of being elongated in the longitudinal direction thereof has been widely used, but when it is desired to impart stretchability with a certain width, a method of fixing the rubber string in a state of being arranged side by side with a gap therebetween in the width is adopted. In addition, as a means for further improving the fit of the surface, a method has been proposed in which an elastic sheet is attached in a state of being stretched in the direction of imparting stretchability. (for example, refer to patent document 1 and patent document 2). The stretchable member including the elastic sheet is formed by passing the 1 st sheet layer and the 2 nd sheet layer through a joint Kong Rongjie formed in the elastic film at a plurality of dot-shaped sheet joint portions arranged at intervals in the stretching direction and in a direction perpendicular to the stretching direction, respectively, in a state where the elastic film is laminated between the 1 st sheet layer and the 2 nd sheet layer and the elastic film is stretched in the stretching direction. In the expansion and contraction member, in a natural length state, as the elastic sheet contracts between the sheet joined portions, the interval between the sheet joined portions becomes narrower, and between the sheet joined portions on the 1 st sheet layer and the 2 nd sheet layer, folds extending in the direction intersecting the expansion and contraction direction are formed. When the elastic sheet is stretched in the opposite direction, the spacing of the sheet joints and the folds and folds in the 1 st and 2 nd sheets expand as the elastic sheet stretches between the sheet joints, and can elastically stretch to the fully expanded state of the 1 st and 2 nd sheets. The stretch region based on the elastic sheet has the advantages that the stretch region is excellent in fit in terms of surface, and the 1 st and 2 nd sheets are not joined to the elastic sheet, and the 1 st and 2 nd sheets are extremely soft because the joining is extremely small, and the joining hole of the elastic sheet contributes to improvement of air permeability. On the other hand, since the stretchability and the appearance of the stretchable member including the elastic sheet change according to the shape of the sheet-joined portion, it is desirable to provide a plurality of sheet-joined portions having different shapes according to the portion of the disposable wearing article. However, when a plurality of sheet joined portions having different shapes are provided, the 1 st sheet layer and the 2 nd sheet layer are not welded together at some of the sheet joined portions, or are in a state where they are welded together but are peeled off by a weak force (welding failure). Prior art literature Patent literature Japanese patent application laid-open No. 2016-189932 Patent document 2 Japanese patent application laid-open No. 2015-204982 Disclosure of Invention Problems to be solved by the invention Accordingly, a main object of the present invention is to prevent welding failure in the case of having sheet joined portions having different shapes. Means for solving the problems The stretchable member, the disposable wearing article having the stretchable member, and the method for manufacturing the stretchable member, which solve the above problems, are as follows. < Mode 1> A stretchable member comprising a stretchable structure of elastic sheets interposed between a 1 st sheet layer made of a nonwoven fabric and a2 nd sheet layer made of a nonwoven fabric, wherein the 1 st sheet layer and the 2 nd sheet layer pass through a joint Kong Rongjie penetrating the elastic sheets at a plurality of sheet joint portions arranged at a distance therebetween, and wherein a region having the stretchable structure comprises a stretchable region which is contracted in a stretchable direction by contraction of the elastic sheets and is stretchable in the stretchable direction, wherein the region having the s