Dissolved air de-bonding of a tissue sheet

Patent metadata

Field	Value
Publication number	US-11248345-B2
Application number	US-201916674336-A
Country	US
Kind code	B2
Filing date	Nov 5, 2019
Priority date	May 23, 2016
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

Tissue papers and methods of making are disclosed herein. In one aspect, a tissue paper is substantially free of a chemical debonder and has a geometric mean tensile (GMT) in a range between about 500 and about 5,000 g/3 inches (g/3 in.) and a caliper in a range between about 50 and about 350 mils/8 sheets.

First claim

What is claimed is:

1. A tissue paper having less than 4 pounds per ton of a chemical debonder and having a geometric mean tensile (GMT) in a range between about 500 and about 5,000 g/3 inches (g/3 in.) and a caliper in a range between about 50 and about 350 mils/8 sheets;
wherein the tissue paper is formed by impregnating a fiber slurry comprising cellulosic fibers with a compressed water-soluble gas under a super-atmospheric pressure in a contained environment, and wherein the tissue paper is formed by a conventional wet press (CWP).

2. The tissue paper of claim 1 , wherein the chemical debonder is present in an amount of less than 2 lb/ton chemical debonder.

3. The tissue paper of claim 1 , wherein the tissue paper has a basis weight in a range between about 5 lb/3,000 ft 2 and about 45 lb/3,000 ft 2 .

4. A tissue paper void of a chemical debonder and having a GMT in a range between about 500 and about 5,000 g/3 in. and a caliper in a range between about 50 and about 350 mils/8 sheets;
wherein the tissue paper is formed by impregnating a fiber slurry comprising cellulosic fibers with a compressed water-soluble gas under a super-atmospheric pressure in a contained environment, and wherein the tissue paper is formed by a conventional wet press (CWP).

5. The tissue paper of claim 4 , wherein the tissue paper has a basis weight in a range between about 5 lb./3,000 ft 2 and about 45 lb./3,000 ft 2 .

6. The tissue paper of claim 5 , wherein the tissue paper has a basis weight in a range between about 8 lb./3,000 ft 2 to about 30 lb./3,000 ft 2 .

Assignees

• Gpcp Ip Holdings Llc

Inventors

• Lee Jeffrey A

Classifications

• D21H27/005 Primary

  relating to physical or mechanical properties, e.g. tensile strength, stretch, softness · CPC title

• D21H27/002

  Tissue paper; Absorbent paper (D21H21/22, D21H27/02, D21H27/20 take precedence; toilet paper A47K10/00; absorbent pads for physiological fluids A61L15/16; making on paper-making machines D21F11/00) · CPC title

• D21H25/04

  Physical treatment, e.g. heating, irradiating (D21H25/18 takes precedence; dryer section of machines for making continuous webs of paper D21F5/00) · CPC title

• D21H21/56

  Foam · CPC title

• D21H11/14

  Secondary fibres (working-up waste paper D21C5/02) · CPC title