Pressing apparatus associated with an absorbent article, and pressing method

Patent metadata

Field	Value
Publication number	US-9314968-B2
Application number	US-201113819721-A
Country	US
Kind code	B2
Filing date	Aug 22, 2011
Priority date	Aug 31, 2010
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A pressing apparatus associated with an absorbent article, including: a pair of rollers that are driven and rotate with outer circumferential surfaces thereof facing each other, when a fibrous continuous sheet overlapped with an article to be overlapped with a thermoplastic adhesive therebetween is passed in a continuous direction of the fibrous continuous sheet through a roller gap between the pair of rollers, the pressing apparatus sandwiching and pressing the article to be overlapped and the fibrous continuous sheet between the outer circumferential surfaces, and a heating mechanism that heats at least a roller of the pair of rollers that is positioned on a side of the fibrous continuous sheet, the heating mechanism heating the roller so as to keep a temperature of the outer circumferential surface of the roller within a range from 70° C. to 120° C.

First claim

The invention claimed is:

1. A method of pressing an absorbent article which comprises:
providing an absorbent article comprising a fibrous continuous sheet, a fluid-impermeable continuous sheet and a plurality of absorbent bodies sandwiched between the fibrous continuous sheet and the fluid-impermeable continuous sheet with a thermoplastic adhesive;
passing the absorbent article in a continuous direction of the fibrous continuous sheet through a roller gap between a pair of rollers that are driven and rotate with outer circumferential surfaces thereof facing each other, so that the fibrous continuous sheet, the fluid-impermeable continuous sheet and the plurality of absorbent articles are sandwiched and pressed between the outer circumferential surfaces of the pair of rollers;
heating only one roller of the pair of rollers that is positioned on a side of the fibrous continuous sheet and contacts the fibrous continuous sheet so as to keep a temperature of the outer circumferential surface of the roller within a range from 70° C. to 120° C.; and
wherein
the thermoplastic adhesive is ejected from a nozzle of an adhesive application device between the fibrous continuous sheet and the article plurality of absorbent articles,
the thermoplastic adhesive is made to be substantially in a cohesive state just before reaching the roller gap by making a temperature of the thermoplastic adhesive fall to 40° C. to 60° C. just before reaching the roller gap,
the one roller of the pair of rollers that is positioned on a side of the fibrous continuous sheet is heated with a heating mechanism,
the heating mechanism includes a heating element inserted in a receiving hole of the one roller,
the receiving hole receives the heating element along a rotational shaft of the one roller and is formed so that a center of the receiving hole corresponds to the rotational shaft.

2. A method of pressing an absorbent article according to claim 1 , wherein,
the temperature of the outer circumferential surface of the only roller that contacts the fibrous continuous sheet is kept within a range from 80° C. to 110° C.

3. A method of pressing an absorbent article according to claim 1 , wherein,
the thermoplastic adhesive is a hot-melt adhesive, and
the fibrous continuous sheet is tissue paper.

Assignees

• Fujiwara Tomohiro
• Ishikawa Osamu
• Uni Charm Corp

Inventors

• Fujiwara Tomohiro
• Ishikawa Osamu

Classifications

• B29C43/28 Primary

  incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles · CPC title

• B29C66/433

  Casing-in, i.e. enclosing an element between two sheets by an outlined seam (for bookbinding B42C11/06; for packaging B65B; by laminating B32B37/00; enclosing tubular articles between substantially flat elements B29C66/53261) · CPC title

• B65H2301/43822

  involving heating · CPC title

• B29C66/91651

  by controlling or regulating the heat generated by Joule heating or induction heating · CPC title

• B29C66/91216

  enabling contactless temperature measurements, e.g. using a pyrometer · CPC title