Shaped sheet manufacturing method

Patent metadata

Field	Value
Publication number	US-2021339521-A1
Application number	US-201917281151-A
Country	US
Kind code	A1
Filing date	Oct 24, 2019
Priority date	Oct 24, 2018
Publication date	Nov 4, 2021
Grant date	—

Abstract

In a shaped sheet manufacturing method, it is possible to reliably shape a first sheet even if the tension of the first sheet is reduced at the time of manufacturing the shaped sheet. In a first step, a first sheet is conveyed along an outer peripheral surface of a first roll having a plurality of recessed parts. In a second step, a second sheet is overlapped with the first sheet and conveyed together with the first sheet so that the first and second sheets are held between the recessed parts of the first roll and projection parts of a second roll. In a third step, the first and second sheets having passed between the first roll and the second roll are bonded to each other. In the second step, the tension of the first sheet is made smaller than the tension of the second sheet.

First claim

1 . A shaped sheet manufacturing method using a shaped sheet manufacturing device comprising: a first roll having a plurality of recessed parts on an outer peripheral surface thereof; and a second roll having a plurality of projection parts on an outer peripheral surface thereof, and in which the first and second rolls are disposed adjacent to each other and rotate in synchronism and the recessed parts and the projection parts engage with each other with space therebetween, the method comprising:
a first step of conveying a first sheet which is a continuous body along the outer peripheral surface of the first roll which is rotating; a second step of overlapping a second sheet which is a continuous body with the first sheet and conveying the second sheet together with the first sheet so that the first sheet and the second sheet pass between the first roll and the second roll and are held between the recessed parts and the projection parts; and a third step of bonding to each other the first and second sheets having passed between the first roll and the second roll, wherein in the second step, a tension of the first sheet is made smaller than a tension of the second sheet.

2 . The shaped sheet manufacturing method according to claim 1 , wherein in the third step, the first and second sheets are bonded to each other by using a bonder disposed adjacent to the first roll under a condition where parts of the first sheet pressed into the recessed parts by the projection parts remain in the recessed parts.

3 . The shaped sheet manufacturing method according to claim 1 , wherein in the second step, the second sheet is overlapped with the first sheet so that the second sheet starts to overlap with the first sheet in an area where the recessed parts and the projection parts engage with each other with space therebetween.

4 . The shaped sheet manufacturing method according to claim 1 , wherein the first and second sheets are non-stretchable non-woven sheets.

5 . The shaped sheet manufacturing method according to claim 2 , wherein in the second step, the second sheet is overlapped with the first sheet so that the second sheet starts to overlap with the first sheet in an area where the recessed parts and the projection parts engage with each other with space therebetween.

6 . The shaped sheet manufacturing method according to claim 2 , wherein the first and second sheets are non-stretchable non-woven sheets.

7 . The shaped sheet manufacturing method according to claim 3 , wherein the first and second sheets are non-stretchable non-woven sheets.

Assignees

• Zuiko Corp

Inventors

• YAMATO Shigeaki

Classifications

• Y10T156/1023

  Surface deformation only [e.g., embossing] · CPC title

• A61F13/15731

  Treating webs, e.g. for giving them a fibrelike appearance, e.g. by embossing · CPC title

• B32B2555/02

  Diapers or napkins · CPC title

• A61F13/15707

  Mechanical treatment, e.g. notching, twisting, compressing, shaping · CPC title

• B32B38/06 Primary

  Embossing · CPC title