High strength and low stiffness hesperaloe tissue

Patent metadata

Field	Value
Publication number	US-11773539-B2
Application number	US-202218085828-A
Country	US
Kind code	B2
Filing date	Dec 21, 2022
Priority date	Nov 23, 2016
Publication date	Oct 3, 2023
Grant date	Oct 3, 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 at least one multi-layered through-air dried tissue web, the tissue web comprising a first and a second layer, the second layer comprising high yield hesperaloe pulp fibers and the first layer being substantially free from high yield hesperaloe pulp fibers, the tissue product comprising from about 5 to about 50 percent, by weight of the product, high yield hesperaloe fibers and having a geometric mean tensile (GMT) from 1,000 to 1,500 g/3″ and a cross-machine tensile energy absorption (CD TEA) from about 6.0 to about 8.0 g·cm/cm 2 .

2. The tissue product of claim 1 wherein the tissue product has a geometric mean tensile energy absorption (GM TEA) greater than about 9.0 g·cm/cm 2 .

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

4. The tissue product of claim 1 wherein the tissue product has a Stiffness Index from 4.0 to 8.0.

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

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 geometric mean slope (GM Slope) of less than about 6.0 kg.

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

9. The tissue product of claim 8 having a sheet bulk greater than about 10 cc/g.

10. The tissue product of claim 1 having a dry burst strength of about 800 gf or greater.

11. The tissue product of claim 1 having a geometric mean tear (GM Tear) of about 15.0 gf or greater.

12. The tissue product of claim 1 having a Burst Index from 8.0 to 12.0 and a TEA Index from 10.0 to 14.0.

13. The tissue product of claim 1 wherein the at least one multi-layered through-air dried tissue web is substantially free from softwood kraft pulp fibers.

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

• D21F11/04

  paper or board consisting on two or more layers · CPC title

• D21F11/14

  Making cellulose wadding, filter or blotting paper · CPC title

• D21G1/00

  Calenders (if restricted to the treatment of particular materials see the relevant class, e.g. B29C43/24, D06); Smoothing apparatus · CPC title

• D21H11/12

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