Soft, absorbent sheets having high absorbency and high caliper, and methods of making soft, absorbent sheets

Patent metadata

Field	Value
Publication number	US-9574306-B2
Application number	US-201514970812-A
Country	US
Kind code	B2
Filing date	Dec 16, 2015
Priority date	Nov 14, 2013
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A method of making a paper product includes forming an aqueous cellulosic web on a structuring fabric in a papermaking machine, non-compactively dewatering the cellulosic web on the structuring fabric, and drying the cellulosic web to form the paper product. The portion of the structuring fabric on which the cellulosic web is formed has a planar volumetric index of at least about 26.

First claim

We claim:

1. A method of making a paper product, the method comprising:
forming an aqueous cellulosic web on a portion of a structuring fabric in a papermaking machine;
non-compactively dewatering the cellulosic web on the structuring fabric; and
drying the cellulosic web to form the paper product,
wherein the portion of the structuring fabric on which the cellulosic web is formed has a planar volumetric index of at least about 26.

2. The method according to claim 1 , wherein the planar volumetric index is about 26 to about 30.5.

3. The method according to claim 1 , wherein a contact area of the portion of the structuring fabric is formed entirely by knuckles on warp yarns of the structuring fabric.

4. The method according to claim 1 , further comprising using a furnish to form the cellulosic web, the furnish including cellulosic long fiber having a coarseness of at least about 15.5 mg/100 mm.

5. A method of making a paper product, the method comprising:
forming an aqueous cellulosic web on a portion of a structuring fabric in a papermaking machine;
non-compactively dewatering the cellulosic web on the structuring fabric; and
drying the cellulosic web to form the paper product,
wherein the portion of the structuring fabric on which the cellulosic web is formed has a planar volumetric index of least about 26 (i) during an initial period in which the cellulosic web is formed on the portion of the structuring fabric on the papermaking machine and (ii) after the structuring fabric is run for about 950,000 cycles of operation of the papermaking machine.

6. The method according to claim 5 , wherein a contact area of the portion of the structuring fabric is entirely formed by knuckles on warp yarns of the structuring fabric.

7. The method according to claim 5 , wherein the planar volumetric index is about 26 to about 30.5 (i) during the initial period in which the cellulosic web is formed on the portion of the structuring fabric and (ii) after the structuring fabric is run for about 950,000 cycles of operation of the papermaking machine.

8. The method according to claim 5 , further comprising using a furnish used to form the cellulosic web, the furnish including cellulosic long fiber having a coarseness of at least about 15.5 mg/100 mm.

9. A papermaking machine for making a paper product using a through air drying process, the papermaking machine comprising:
a headbox for supplying an aqueous furnish;
a structuring fabric having a surface with a contact area, the structuring fabric being configured (i) to receive the furnish from the headbox on a portion of the surface to thereby form a cellulosic web from the furnish and (ii) to non-compactively dewater the cellulosic web; and
at least one through air drier for drying the cellulosic web on the structuring fabric,
wherein the portion of the structuring fabric on which the cellulosic web is formed has a planar volumetric index of at least about 26.

10. The papermaking machine according to claim 9 , wherein the planar volumetric index is about 26 to about 30.5.

11. The papermaking machine according to claim 9 , wherein the contact area of the structuring fabric is entirely formed by knuckles on warp yarns of the structuring fabric.

Assignees

• Georgia Pacific Consumer Products Lp

Inventors

• Chou Hung Liang
• Sze Daniel H
• Fan Xiaolin
• Harper Frank D
• Olson Steven R

Classifications

• D04H1/425

  Cellulose series · CPC title

• D21H27/007

  relating to absorbency, e.g. amount or rate of water absorption, optionally in combination with other parameters relating to physical or mechanical properties · CPC title

• D21F7/12

  Drying · CPC title

• D21F1/10

  Wire-cloths · CPC title

• D21H27/005

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