Process for producing strong and soft tissue and towel products

Patent metadata

Field	Value
Publication number	US-11047090-B2
Application number	US-201916502057-A
Country	US
Kind code	B2
Filing date	Jul 3, 2019
Priority date	Mar 24, 2016
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

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 in said pulp material to form a slurry having at least about 7 percent less vessels per meter than said pulp material; and c. processing said slurry to form said web material.

First claim

What is claimed is:

1. A process for manufacturing a multi-ply web material comprising a layered first ply and a layered second ply, the process 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) processing the accepts stream to form at least a portion of an outer layer of the first ply and/or at least a portion of an outer layer of the second ply; and
d) separating fibers having an average width of at less than 50 μM from said pulp material.

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 layered web material, the process 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) processing the accepts stream to form at least a portion of an outer layer of the layered web material; and
d) separating fibers having an average width of at less than 50 μM from said pulp material.

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 14 , further comprising the step of adding the second accepts stream to the accepts stream.

17. A process for manufacturing a multi-ply web material comprising a first ply having at least an inner layer and an outer layer, and a second ply having at least an inner layer and an outer layer, the process 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) processing the accepts stream to form at least a portion of an outer layer of the first ply and/or at least a portion of an outer layer of the second ply;
d) processing the rejects stream to form at least a portion of an inner layer of the first ply and/or at least a portion of the inner layer of the second ply; and
e) separating fibers having an average width of at less than 50 μM from said pulp material.

18. The process of claim 17 , further comprising the step of separating the vessels from the fibers with a hydrocyclone.

19. The process of claim 17 , 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.

20. The process of claim 19 , further comprising the step of adding the second accepts stream to the accepts stream.

Assignees

• Procter & Gamble

Inventors

• Polat Osman
• Kavalew Dale Gary

Classifications

• D21B1/026

  Separating fibrous materials from waste · CPC title

• D21D5/24 Primary

  in cyclones · 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