Manufacturing method for disposable worn article

Patent metadata

Field	Value
Publication number	US-10130522-B2
Application number	US-201515108863-A
Country	US
Kind code	B2
Filing date	Jan 28, 2015
Priority date	Feb 3, 2014
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A method for manufacturing a disposable worn article including the steps of: carrying a continuous sheet (W 1 ) continuous in a carrying direction (X 1 ); placing elastic members (F 3 ), continuous in the carrying direction of the continuous sheet, on the continuous sheet with the continuous elastic members stretched; placing discontinuous sheets (W 2 ), each of which has a predetermined length, on the continuous sheet intermittently and successively in the carrying direction so that the continuous elastic members are sandwiched between the discontinuous sheets and the continuous sheet; and carrying out a first joining step in which, in an area where each of the discontinuous sheets is placed, the continuous sheet, each of the discontinuous sheets, and the continuous elastic members are joined to one another, intermittently in the carrying direction, along first joining portions ( 32 A, 32 C) extending in a width direction (Y) crossing the carrying direction.

First claim

The invention claimed is:

1. A method for manufacturing a disposable worn article comprising the steps of:
carrying a continuous sheet that is continuous in a carrying direction;
placing a plurality of continuous elastic members, which are continuous in the carrying direction of the continuous sheet, on the continuous sheet with each of the continuous elastic members stretched;
placing a plurality of discontinuous sheets, each of which has a predetermined length, on the continuous sheet intermittently and successively in the carrying direction so that the continuous elastic members are sandwiched between the discontinuous sheets and the continuous sheet; and
carrying out a first joining step in which, in an area where each of the discontinuous sheets is placed, the continuous sheet, each of the discontinuous sheets, and the continuous elastic members are joined to one another, intermittently in the carrying direction, along a plurality of first joining portions extending in a width direction crossing the carrying direction the first joining portions extending across the continuous sheet, wherein
in the first joining step, the first joining portions are formed in opposite end portions of each of the discontinuous sheets in the carrying direction and in a central portion of each of the discontinuous sheets, the central portion being spaced apart from the opposite end portions and between the opposite end portions,
the first joining portions are formed only in the opposite end portions and the central portion of each of the discontinuous sheets, and
the continuous elastic members are joined to the continuous sheet and each of the discontinuous sheets only in the opposite end portions and the central portion of each of the discontinuous sheets,
the method further comprises the steps of:
cutting the continuous elastic members between two discontinuous sheets of the plurality of discontinuous sheets, the two discontinuous sheets being adjacent to each other in the carrying direction,
the continuous elastic members that are cut in the step of cutting shrinking and shortening toward the discontinuous sheets, thereby intermittently producing groups of discontinuous elastic members in the carrying direction;
carrying out a second joining step in which, between the plurality of first joining portions in the area where each of the discontinuous sheets is placed, the continuous sheet and each of the discontinuous sheets are intermittently joined to each other, along a stretching direction of the discontinuous elastic members, on a plurality of second joining portions,
the second joining step is carried out so that the plurality of second joining portions are formed only between two discontinuous elastic members of each of the groups of discontinuous elastic members, the two discontinuous elastic members being adjacent to each other in the width direction;
successively placing one end portion, in the carrying direction, of each of a plurality of absorbent bodies on the continuous sheet between two discontinuous sheets of the discontinuous sheets, adjacent to each other in the carrying direction, and between two groups of the groups of discontinuous elastic members, adjacent to each other in the carrying direction;
cutting the continuous sheet and each of the discontinuous sheets in the central portion along the width direction crossing the carrying direction in order to obtain individual worn articles.

2. The manufacturing method according to claim 1 , wherein
in the first joining step, the continuous sheet, each of the discontinuous sheets, and the continuous elastic members are joined to one another by an adhesive to intermittently form the first joining portions, and
in the second joining step, the continuous sheet and each of the discontinuous sheets are partially welded and joined with each other at the second joining portions.

Assignees

• Zuiko Corp

Inventors

• Umebayashi Toyoshi

Classifications

• A61F13/15699

  Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs · CPC title

• B29C65/74

  by welding and severing {, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area} · CPC title

• B29L2031/4878

  Diapers, napkins · CPC title

• A61F13/49012

  the elastic means being elastic panels · CPC title

• B29L2009/001

  the layers being loose · CPC title