High strength and low stiffness hesperaloe tissue

Patent metadata

Field	Value
Publication number	US-11566379-B2
Application number	US-202117168857-A
Country	US
Kind code	B2
Filing date	Feb 5, 2021
Priority date	Nov 23, 2016
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

Soft, durable and bulky tissue products comprising non-wood fibers and more particularly high yield hesperaloe pulp fibers are disclosed. The tissue products preferably comprise at least about 5 percent, by weight of the product, high yield hesperaloe pulp fiber and have relatively modest tensile strengths, such as a geometric mean tensile (GMT) greater than about 1,000 g/3″, and improved durability and cross-machine direction (CD) properties, such as a CD Stretch greater than about 10 percent. Additionally, at the foregoing tensile strengths the products are not overly stiff. For example the tissue products may have a Stiffness Index less than about 10.0.

First claim

What is claimed is:

1. A tissue product comprising wood pulp fibers and from about 5 to about 50 percent, by weight of the product, high yield hesperaloe fibers, the tissue product having a geometric mean tensile (GMT) from 1,000 to 1,500 g/3″ and a Stiffness Index from 4.0 to 8.0.

2. The tissue product of claim 1 having a TEA Index from 10.0 to 14.0.

3. The tissue product of claim 1 having a Geometric Mean Tensile Energy Absorption (GM TEA) greater than about 9.0 g·cm/cm 2 .

4. The tissue product of claim 1 having a cross-machine direction stretch (CD Stretch) from 10.0 to 14.0 percent.

5. The tissue product of claim 4 having a cross-machine direction tensile energy absorption (CD TEA) from 6.0 to 8.0 g·cm/cm 2 .

6. The tissue product of claim 1 having a Tensile Ratio from 1.5 to 2.5.

7. The tissue product of claim 1 having a Stiffness Index from 4.0 to 7.0 and a GM TEA greater than about 9.0 g·cm/cm 2 .

8. The tissue product of claim 1 having a GM Slope of less than about 6.0 kg.

9. The tissue product of claim 1 having a basis weight from about 30 to about 60 grams per square meter (gsm).

10. The tissue product of claim 9 having a sheet bulk greater than about 10 cc/g.

11. The tissue product of claim 1 comprising from about 20 to about 50 percent, by weight of the product, high yield hesperaloe fibers.

12. The tissue product of claim 1 comprising at least one multi-layered through-air dried tissue web comprising a first and a second layer, the first layer being substantially free from high yield hesperaloe pulp fibers and the second layer consisting essentially of high yield hesperaloe pulp fibers.

13. The tissue product of claim 12 wherein the at least one multi-layered through-air dried tissue web is substantially free from softwood kraft pulp fibers.

14. A tissue product comprising wood pulp fibers and from about 5 to about 50 percent, by weight of the product, high yield hesperaloe fibers, the tissue product having a basis weight from 30 to 60 gsm, a sheet bulk of 10 cc/g or greater, a GMT from 1,000 to 1,500 g/3″ and a GM Slope of about 6.0 kg or less.

15. The tissue product of claim 14 having a Stiffness Index from 4.0 to 8.0.

16. The tissue product of claim 14 having a dry burst strength of about 800 gf or greater.

17. The tissue product of claim 14 having a geometric mean tear (GM Tear) of about 15.0 gf or greater.

18. The tissue product of claim 14 having a Burt Index from 8.0 to 12.0 and a TEA Index from 10.0 to 14.0.

19. The tissue product of claim 14 having a CD Stretch of about 10 percent or greater.

20. The tissue product of claim 14 having a Stiffness Index from 4.0 to 7.0 and a GM TEA greater than about 9.0 g·cm/cm2.

Assignees

• Kimberly Clark Co

Inventors

• Rouse Kayla Elizabeth
• Underhill Richard Louis
• Paulson David John
• Sauer Felicia Marie
• Shannon Thomas Gerard

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

• D21H27/38

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

• D21H27/42

  comprising dry-laid paper · CPC title

• D21H11/12

  Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse · CPC title