Multi-ply fibrous structures

Patent metadata

Field	Value
Publication number	US-11708668-B2
Application number	US-202117541532-A
Country	US
Kind code	B2
Filing date	Dec 3, 2021
Priority date	Jan 20, 2017
Publication date	Jul 25, 2023
Grant date	Jul 25, 2023

Abstract

Multi-ply fibrous structures and more particularly multi-ply fibrous structures containing three or more different fibrous structure plies, and methods for making same are provided.

First claim

What is claimed is:

1. A multi-ply fibrous structure comprising:
a. a first ply comprising a layered fibrous structure comprising:
i. a first layer comprising a first wet laid fibrous structure comprising a plurality of first fibers; and
ii. a second layer comprising a plurality of hydroxyl polymer filaments deposited directly onto at least one surface of the first wet laid fibrous structure; and

b. a second ply comprising a second wet laid fibrous structure comprising a plurality of second fibers, wherein the first wet laid fibrous structure of the first ply is bonded to the second wet laid fibrous structure of the second ply.

2. The multi-ply fibrous structure according to claim 1 wherein the second ply is positioned between at least two of the first plies.

3. The multi-ply fibrous structure according to claim 1 wherein the second wet laid fibrous structure exhibits a greater bulk density than the first wet laid fibrous structure.

4. The multi-ply fibrous structure according to claim 1 wherein the second wet laid fibrous structure is more textured than the first wet laid fibrous structure.

5. The multi-ply fibrous structure according to claim 1 wherein the second wet laid fibrous structure exhibits a different basis weight than the first wet laid fibrous structure.

6. The multi-ply fibrous structure according to claim 1 wherein the multi-ply fibrous structure further comprises a third ply comprising a plurality of third fibers.

7. The multi-ply fibrous structure according to claim 1 wherein the plurality of hydroxyl polymer filaments exhibits an average diameter of less than 10 μm as measured according to the Average Diameter Test Method.

8. The multi-ply fibrous structure according to claim 1 wherein at least one of the plurality of hydroxyl polymer filaments comprises starch and/or starch derivative.

9. The multi-ply fibrous structure according to claim 1 wherein at least one of the plurality of hydroxyl polymer filaments comprises polyvinyl alcohol.

10. The multi-ply fibrous structure according to claim 1 wherein at least one of the plurality of polymer filaments comprises a crosslinked polymer.

11. The multi-ply fibrous structure according to claim 1 wherein the plurality of first fibers comprise pulp fibers.

12. The multi-ply fibrous structure according to claim 1 wherein the plurality of second fibers comprise pulp fibers.

13. The multi-ply fibrous structure according to claim 1 wherein the multi-ply fibrous structure comprises an exterior surface that is void of surface chemistry agents.

14. The multi-ply fibrous structure according to claim 1 wherein the plurality of hydroxyl polymer filaments exhibit greater surface smoothness relative to the surface of the plurality of first fibers.

15. The multi-ply fibrous structure according to claim 1 wherein the first ply is associated with the second ply through one or more bond sites.

16. The multi-ply fibrous structure according to claim 15 wherein at least one of the bond sites comprises an adhesive bond.

17. The multi-ply fibrous structure according to claim 1 wherein the first wet laid fibrous structure exhibits a basis weight that is different from the basis weight of the plurality of hydroxyl polymer filaments.

18. A method for making a multi-ply fibrous structure according to claim 1 wherein the method comprises the steps of:
a. providing a first wet laid fibrous structure comprising a plurality of first fibers;
b. laying a plurality of hydroxyl polymer filaments on top of at least one surface of the first wet laid fibrous structure to form a first ply; and
c. bonding a second wet laid fibrous structure comprising a plurality of second fibers to the first wet laid fibrous structure of the first ply to form the multi-ply fibrous structure.

Assignees

• Procter & Gamble

Inventors

• Cabell David William
• Mckee Matthew Gary
• Kraus Christopher Scott
• Trokhan Paul Dennis
• Popham Benjamin J

Classifications

• D21H27/38 Primary

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

• D21F11/16

  Making paper strips for spinning or twisting · CPC title

• D21H13/16

  Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters · CPC title

• D21H13/30

  Non-cellulose polysaccharides · CPC title

• D21H27/30

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