Layered tissue comprising long, high-coarseness wood pulp fibers

Patent metadata

Field	Value
Publication number	US-11746473-B2
Application number	US-202217829812-A
Country	US
Kind code	B2
Filing date	Jun 1, 2022
Priority date	Jan 18, 2019
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

The present invention provides mufti-layered tissue webs, and tissue product comprising the same, comprising long, high-coarseness wood pulp fibers selectively deposited in one or more outer layers of the multi-layered web. Surprisingly disposing long, high-coarseness wood pulp fibers in one or more outer layers, even in relatively modest amounts, may improve certain product properties, such as durability, without negatively affecting softness. In certain instances, both the softness and durability may be improved by selectively incorporating long, high-coarseness wood pulp fibers in one or more of the outer layers.

First claim

What is claimed is:

1. A tissue product comprising at least one multi-layered tissue web having a first and a second outer layer and a middle layer disposed there between, wherein the first and the second outer layers comprise from about 5 to about 20 weight percent (wt %) long, high-coarseness wood pulp fiber having an average fiber length greater than about 2.0 mm and a coarseness of 20 mg/100 m or greater, the tissue product having a geometric mean tensile (GMT) from about 700 to about 1,200 g/3″ and a TS7 value less than about 12.0 dB V 2 rms.

2. The tissue product of claim 1 wherein the middle layer is substantially free from long, high-coarseness wood pulp fiber having an average fiber length greater than about 2.0 mm and a coarseness of 20 mg/100 m or greater.

3. The tissue product of claim 1 wherein the long, high-coarseness wood pulp fiber is derived from P. taeda, P. elliotti, P. palustris, P. pungens, P. rigida, P. serotina, P. muricata or P. radiata, and combinations thereof.

4. The tissue product of claim 1 wherein the long, high-coarseness wood pulp fiber has an average fiber length from about 2.0 to about 3.0 mm.

5. The tissue product of claim 1 having a GMT from about 700 to about 1,000 g/3″ and a stiffness index from about 5.0 to about 8.0.

6. The tissue product of claim 1 having a GMT from about 700 to about 1,000 g/3″ and a durability index greater than about 3.75.

7. The tissue product of claim 1 having a GM Tear from about 10.0 to about 15.0 gf.

8. The tissue product of claim 1 having a GM TEA from about 9.0 to about 13.0 g*cm/cm 2 .

9. The tissue product of claim 1 having Wet Burst of about 100 gf or greater.

10. The tissue product of claim 1 wherein the tissue product comprises from about 50 to about 70 wt % short, low-coarseness wood pulp fiber having an average fiber length less than 1.2 mm and a coarseness less than 20 mg/100 m.

11. The tissue product of claim 10 wherein the short, low-coarseness wood pulp fiber is a hardwood kraft pulp fiber derived from Acacia, Eucalyptus, Maple, Oak, Aspen, Birch, Cottonwood, Alder, Ash, Cherry, Elm, Hickory, Poplar, Gum, Walnut, Locust, Sycamore or Beech.

12. The tissue product of claim 1 wherein the long, high-coarseness wood pulp fiber has a ratio of average fiber length, having units of mm, to coarseness, having units of mg/100 m, of about 0.12 or less.

13. The tissue product of claim 12 having a TS7 value from about 10.0 to about 12.0 dB V 2 rms.

Assignees

• Kimberly Clark Co

Inventors

• Shannon Thomas Gerard
• Lindsay Stephen Michael
• Thompson Brent Merrik
• Underhill Richard Louis

Classifications

• D21H27/38 Primary

  at least one of the sheets having a fibrous composition differing from that of other sheets · CPC title

• D21F11/14

  Making cellulose wadding, filter or blotting paper · CPC title

• D21H11/04

  Kraft or sulfate pulp · CPC title

• D21H27/002 Primary

  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

• D21H27/30

  Multi-ply (for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00) · CPC title