IP Library › Granted Patent US 10,640,927

Granted Patent B2

US 10,640,927 · App. 15/708,241 · Granted May 5, 2020

Absorbent paper products having unique physical strength properties

Inventor: Tobias Ziegenbein (Vancouver, CA)

D21H27/30 B32B29/005 D21F11/14 D21H11/02 D21H11/08 D21H11/18 D21H15/02 D21H17/44 D21H21/20 D21H27/002 D21H27/005 B32B2250/02 B32B2307/54 B32B2317/12 B32B2554/00

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Quick Facts

Patent No.: US 10,640,927
App. No.: 15/708,241
Granted: May 5, 2020
Kind: B2

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Abstract

An absorbent towel paper web is disclosed. The absorbent towel paper web has from 20% to 90% of a soft wood pulp fiber mixture having from 18.5% to 88.5% of soft wood pulp fiber, wherein the soft wood pulp fiber is optionally refined; from 0.25% to 5.0% of cationic strengthening polymer, from 10% to 60% of a hard wood pulp fiber mixture; and not more than 10% moisture. The absorbent towel paper web has a Mean Square Dry Tensile Strength index ranging from 6 N·m/g to 12 N·m/g and a Wet Tensile Strength to Dry Tensile Strength Ratio value ranging from 0.295 to 0.35.

Claims (51)

1. An absorbent towel paper web having a differential density, a machine direction, and a cross-machine direction orthogonal to the machine direction, the absorbent towel paper web comprising a fibrous web comprising:

(a) from about 20% to about 90% by weight of the dry fiber basis of the absorbent towel paper web of a refined soft wood pulp fiber mixture comprising:

i) from about 18.5% to about 88.5% by weight of the dry fiber basis of the absorbent towel paper web of long fiber soft wood pulp fiber;

wherein the long fiber soft wood pulp fiber is refined at a delivered energy of less than 50.3 kWh/t before being added to the mixture;

ii) from about 0.25% to about 5.0% by weight of the dry fiber basis of the absorbent towel paper web of cationic strengthening polymer; and,

iii) from about 0.05% to about 20% by weight of the dry fiber basis of the absorbent towel paper web of cellulose nano-filaments;

(b) from about 10% to about 55% by weight of the dry fiber basis of the absorbent towel paper web of a hard wood pulp fiber mixture; and,

wherein the absorbent towel paper web has a Mean Square Dry Tensile Strength index ranging from about 6 N·m/g to about 12 N·m/g; and,

wherein the absorbent towel paper web has a Cross-directional Wet Tensile Strength to Cross-directional Dry Tensile Strength Ratio value ranging from about 0.295 to about 0.35.

2. The absorbent towel paper web according to claim 1 wherein the soft wood pulp fiber is refined at a delivered energy of less than about 25 kWh/bdt.

3. The absorbent towel paper web according to claim 1 wherein the soft wood pulp fiber is refined at a delivered energy of less than about 10 kWh/bdt.

4. The absorbent towel paper web according to claim 1 wherein the absorbent towel paper web is produced by a paper making process that introduces differential density within the fibrous web.

5. The absorbent towel paper web according to claim 1 wherein the absorbent towel paper web is produced via a through-air dried paper-making process.

6. The absorbent towel paper web according to claim 1 wherein the absorbent towel paper web is produced via a New Tissue Technology (NTT) paper-making process.

7. The absorbent towel paper web according to claim 1 wherein the absorbent towel paper web is produced via an Advanced Tissue Molding System (ATMOS) paper-making process.

8. The absorbent towel paper web according to claim 1 wherein the absorbent towel paper web is produced via an Uncreped Through Air Dried (UCTAD) paper-making process.

9. An absorbent towel paper web having a differential density, a machine direction, and a cross-machine direction orthogonal to the machine direction, the absorbent towel paper web comprising a fibrous web comprising:

(a) from about 20% to about 90% by weight of the dry fiber basis of the absorbent towel paper web of a refined soft wood pulp fiber mixture comprising:

i) from about 18.5% to about 88.5% by weight of the dry fiber basis of the absorbent towel paper web of soft wood pulp fiber;

wherein the soft wood pulp fiber is refined at a delivered energy of less than 50.3 kWh/t before being added to the mixture;

ii) from about 0.25% to about 5.0% by weight of the dry fiber basis of the absorbent towel paper web of cationic strengthening polymer; and,

iii) from about 0.05% to about 20% by weight of the dry fiber basis of the absorbent towel paper web of cellulose nano-filaments;

(b) from about 10% to about 60% by weight of the dry fiber basis of the absorbent towel paper web of a hard wood pulp fiber mixture; and,

wherein the absorbent towel paper web has a Dry Tensile Strength value ranging from about 300 N/m to about 600 N/m; and,

wherein the absorbent towel paper web has a Cross-directional Wet Tensile Strength to Cross-directional Dry Tensile Strength Ratio value ranging from about 0.295 to about 0.35.

10. The absorbent towel paper web according to claim 9 wherein the soft wood pulp fiber is refined at a delivered energy of less than about 20 kWh/bdt.

11. The absorbent towel paper web according to claim 9 wherein the soft wood pulp fiber is refined at a delivered energy of less than about 10 kWh/bdt.

12. The absorbent towel paper web according to claim 9 wherein the absorbent towel paper web is produced by a paper making process that introduces differential density within the fibrous web.

13. The absorbent towel paper web according to claim 9 wherein the absorbent towel paper web is produced via a through-air dried paper-making process.

14. The absorbent towel paper web according to claim 9 wherein the absorbent towel paper web is produced via a New Tissue Technology (NTT) paper-making process.

15. The absorbent towel paper web according to claim 9 wherein the absorbent towel paper web is produced via an Advanced Tissue Molding System (ATMOS) paper-making process.

16. The absorbent towel paper web according to claim 9 wherein the absorbent towel paper web is produced by an Uncreped Through Air Dried (UCTAD) paper-making process.

17. An absorbent towel paper web having a machine direction and a cross-machine direction orthogonal to the machine direction, the absorbent towel paper web comprising a fibrous web comprising:

(a) from about 20% to about 90% by weight of the dry fiber basis of the absorbent towel paper web of a refined soft wood pulp fiber mixture comprising:

i) from about 18.5% to about 88.5% by weight of the dry fiber basis of the absorbent towel paper web of long fiber soft wood pulp fiber;

wherein the long fiber soft wood pulp fiber is refined at a delivered energy of less than 50.3 kWh/t refined before being added to the mixture;

ii) from about 0.25% to about 5.0% by weight of the dry fiber basis of the absorbent towel paper web of cationic strengthening polymer; and,

iii) from about 0.05% to about 20% by weight of the dry fiber basis of the absorbent towel paper web of cellulose nanofilaments;

(b) from about 10% to about 55% by weight of the dry fiber basis of the absorbent towel paper web of a hard wood pulp fiber mixture; and,

wherein the absorbent towel paper web has a Mean Square Dry Tensile Strength index ranging from about 6 N·m/g to about 12 N·m/g; and,

wherein the absorbent towel paper web has a Cross-directional Wet Tensile Strength to Cross-directional Dry Tensile Strength Ratio value ranging from about 0.20 to about 0.50.

18. The absorbent towel paper web according to claim 17 wherein the soft wood pulp fiber is refined at a delivered energy of less than about 25 kWh/bdt.

19. The absorbent towel paper web according to claim 17 wherein the soft wood pulp fiber is refined at a delivered energy of less than about 10 kWh/bdt.

20. The absorbent towel paper web according to claim 17 wherein the absorbent towel paper web is produced by a paper making process that introduces differential density within the fibrous web.

21. The absorbent towel paper web according to claim 17 wherein the absorbent towel paper web is produced via a through-air dried paper-making process.

22. The absorbent towel paper web according to claim 17 wherein the absorbent towel paper web is produced via a New Tissue Technology (NTT) paper-making process.

23. The absorbent towel paper web according to claim 17 wherein the absorbent towel paper web is produced via an Advanced Tissue Molding System (ATMOS) paper-making process.

24. The absorbent towel paper web according to claim 17 wherein the absorbent towel paper web is produced via an Uncreped Through Air Dried (UCTAD) paper-making process.

Continuity (2)

Provisional Application 62396812 · Sep 19, 2016

Related Publication 20180187377A1 · Jul 5, 2018