Process for producing strong and soft tissue and towel products

Patent metadata

Field	Value
Publication number	US-11834787-B2
Application number	US-202117325611-A
Country	US
Kind code	B2
Filing date	May 20, 2021
Priority date	Mar 24, 2016
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

A process for manufacturing a web material is disclosed. The process generally provides the steps of: a. providing a pulp material comprising fibers and vessels; b. separating said vessels from said fibers to form an accepts stream and a rejects stream; c. forming plies with the rejects and accepts streams; and d. joining the plies.

First claim

What is claimed is:

1. A process for manufacturing a multi-ply web material comprising the steps of:
a) providing a pulp material comprising fibers and vessels;
b) separating the vessels from the fibers in the pulp material to form an accepts stream having at least 7 percent less vessels per meter than the pulp material, and a rejects stream having 15% more vessels per meter than the pulp material;
c) using the accepts stream to form a first ply of the multi-ply web material;
d) using the rejects stream to form a second ply of the multi-ply web material; and
e) joining the first ply and the second ply.

2. The process of claim 1 , further comprising the step of separating the vessels from the fibers with a hydrocyclone.

3. The process of claim 1 , further comprising the step of processing the rejects stream to create a second accepts stream and a second rejects stream, the second accepts stream having less vessels than the second rejects stream.

4. The process of claim 3 , further comprising the step of adding the second accepts stream to the accepts stream.

5. The process of claim 1 , wherein the step c) further comprises the step of depositing the accepts stream on a foraminous forming wire.

6. The process of claim 5 , further comprising the step of dewatering the accepts stream disposed upon the foraminous forming wire.

7. The process of claim 6 , further comprising the step of transferring the dewatered accepts stream to a foraminous forming member.

8. The process of claim 7 , further comprising the step of dewatering the accepts stream disposed upon the foraminous forming member.

9. The process of claim 8 , further comprising the step of predrying the dewatered accepts stream through use of a blow-through pre-dryer.

10. The process of claim 9 , further comprising the step of transferring the predried accepts stream from the foraminous forming member to a surface of a Yankee dryer.

11. The process of claim 10 , further comprising the step of drying the pre-dried accepts stream on the surface of the Yankee dryer.

12. The process of claim 11 , further comprising the step of creping the dried accepts stream from the surface of the Yankee dryer to form at least a portion of the outer layer of the first ply and/or at least a portion of the outer layer of the second ply of the multi-ply web material.

13. A process for manufacturing a multi-ply web material comprising the steps of:
a) providing a pulp material comprising fibers and vessels;
b) separating the vessels from the fibers in the pulp material to form an accepts stream having at least 7 percent less vessels per meter than the pulp material, and a rejects stream having 15% more vessels per meter than the pulp material;
c) using the accepts stream to form a first layer of a first ply and a first layer of a second ply of the multi-ply web material;
d) using the rejects stream to form a second layer of the first ply and a second layer of the second ply of the multi-ply web material; and
e) joining each of the plies together.

14. The process of claim 13 , further comprising the step of separating the vessels from the fibers with a hydrocyclone.

15. The process of claim 13 , further comprising the step of processing the rejects stream to create a second accepts stream and a second rejects stream, the second accepts stream having less vessels than the second rejects stream.

16. The process of claim 15 , further comprising the step of adding the second accepts stream to the accepts stream.

17. The process of claim 13 , wherein each of the layers comprise Eucalyptus.

18. The process of claim 13 , wherein at least two of the layers comprise NSK.

19. The process of claim 13 , wherein the second layers of each of the first and second plies comprise NSK.

20. The process of claim 18 , wherein the at least two of the layers comprising NSK are at least the second layer of the first ply and the second layer of the second ply.

21. The process of claim 20 , wherein the at least two layers comprising NSK also comprise Eucalyptus.

22. A process for manufacturing a multi-ply web material comprising the steps of:
a) providing a pulp material comprising fibers and vessels;
b) separating the vessels from the fibers in the pulp material to form an accepts stream and a rejects stream;
c) using the accepts stream to form a first ply of the multi-ply web material;
d) using the rejects stream to form a second ply of the multi-ply web material; and
e) joining the first ply and the second ply, wherein the first ply comprises at least 8% more vessels per meter than the second ply.

23. The process of claim 22 , further comprising the step of separating the vessels from the fibers with a hydrocyclone.

24. The process of claim 22 , further comprising the step of processing the rejects stream to create a second accepts stream and a second rejects stream, the second accepts stream having less vessels than the second rejects stream.

Assignees

• Procter & Gamble

Inventors

• Polat Osman
• Kavalew Dale Gary

Classifications

• D21D5/24 Primary

  in cyclones · CPC title

• D21B1/026

  Separating fibrous materials from waste · CPC title

• D21D99/00

  Subject matter not provided for in other groups of this subclass · CPC title

• D21F11/14

  Making cellulose wadding, filter or blotting paper · CPC title