Soft tissue produced using a structured fabric and energy efficient pressing

Patent metadata

Field	Value
Publication number	US-10273635-B2
Application number	US-201514951121-A
Country	US
Kind code	B2
Filing date	Nov 24, 2015
Priority date	Nov 24, 2014
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A structured tissue product produced using a structured or imprinting fabric and a press roll. The tissue product has at least two plies, and has a crumple resistance of less than 30 grams force and an average peak to valley depth of at least 65 microns.

First claim

The invention claimed is:

1. A structured tissue product comprising at least two plies, wherein the tissue has a crumple resistance of less than 30 grams force and an average peak to valley depth of at least 65 microns, and wherein:
a web that makes up one of the at least two plies comprises a first exterior layer, an interior layer and a second exterior layer;
the interior layer contains a first wet end additive comprising an ionic surfactant and a second wet end additive comprising a non-ionic surfactant; and
wherein the ratio of the ionic surfactant to the non-ionic surfactant added to a pulp mix for the interior layer of the tissue product is between one to eight and one to ninety by weight.

2. The structured tissue product according to claim 1 , wherein the tissue product has an average peak to valley depth of at least 100 microns.

3. The structured tissue product according to claim 1 , wherein the first exterior layer comprises at least 50% virgin hardwood fibers.

4. The structured tissue product according to claim 3 , wherein the first exterior layer comprises at least 75% virgin hardwood fibers.

5. The structured tissue product according to claim 3 , wherein the virgin hardwood fibers is virgin eucalyptus fibers.

6. The structured tissue product according to claim 1 , wherein the interior layer comprises cannabis fibers in an amount of 1% to 10%.

7. The structured tissue product according to claim 1 , wherein the second exterior layer comprises cannabis fibers in an amount of 1% to 10%.

8. The structured tissue product according to claim 1 , the first exterior layer comprises a wet end temporary wet strength additive.

9. The structured tissue product according to claim 8 , wherein wet end temporary wet strength additive comprises glyoxalated polyacrylamide.

10. The structured tissue product according to claim 1 , wherein the first exterior layer comprises a wet end dry strength additive.

11. The structured tissue product according to claim 10 , wherein the wet end dry strength additive comprises amphoteric starch.

12. The structured tissue product according to claim 1 , wherein the second exterior layer comprises a wet end dry strength additive.

13. The structured tissue product according to claim 12 , wherein the wet end dry strength additive comprises amphoteric starch.

14. The structured tissue product according to claim 1 , wherein the second wet end additive comprises an ethoxylated vegetable oil.

15. The structured tissue product according to claim 1 , wherein the second wet end additive comprises a combination of ethoxylated vegetable oils.

16. The structured tissue product according to claim 1 , wherein the ionic surfactant comprises a debonder.

17. The structured tissue product according to claim 1 , wherein the first and second exterior layers are substantially free of surface deposited softener agents or lotions.

18. The structured tissue product according to claim 1 , wherein the first exterior layer comprises a surface deposited softener agent or lotion.

19. The structured tissue product according to claim 1 , wherein the non-ionic surfactant has a hydrophilic-lipophilic balance of less than 10.

20. The structured tissue product of claim 1 , wherein the tissue product has a caliper of 400 microns/2 ply to 600 microns/2 ply and is un-calendered.

21. The structured tissue product of claim 1 , wherein the tissue product has a caliper of 250 microns/2 ply to 375 microns/2 ply and is calendered.

22. The structured tissue product of claim 1 , wherein the tissue product has a caliper of 600 microns/2 ply to 800 microns/2 ply and is calendered.

23. The structured tissue product of claim 1 , wherein the tissue product has a caliper of 500 microns/2 ply to 700 microns/2 ply and is calendered.

24. The structured tissue product of claim 1 , wherein the tissue product has a basis weight in g/m 2 per 2 ply of at least 28g/m 2 .

25. The structured tissue product of claim 1 , wherein the tissue product has a machine direction tensile strength per 2 ply of 110 N/m to 190 N/m.

26. The structured tissue product of claim 1 , wherein the tissue product has a cross machine direction tensile strength per 2 ply of 35 N/m to 90 N/m.

27. The structured tissue product of claim 1 , wherein the tissue product has a machine direction stretch of 4% to 30% per 2 ply.

28. The structured tissue product of claim 1 , wherein the tissue product has a cross direction stretch of 4% to 20% per 2 ply.

29. The structured tissue product of claim 1 , wherein the tissue product has a 2-ply cross direction wet tensile strength of 0 to 25 N/m.

30. The structured tissue product of claim 1 , wherein the tissue product has a ball burst strength of 150 gf to 300 gf per 2-ply.

31. The structured tissue product of claim 1 , wherein the tissue product has a lint value of 2.5 to 7.5 per 2 ply as measured using a Sutherland® 2000™ Rub Tester.

32. The structured tissue product of claim 1 , wherein the tissue product has a softness of 85 TSA to 100 TSA as measured using a Tissue Softness Analyzer.

33. The structured tissue product of claim 1 , wherein a web that makes up at least one of the two plies contains a glyoxylated polyacrylamide, an amphoteric starch and a debonder.

34. The structured tissue product of claim 1 , wherein the first exterior layer is comprised of 100% eucalyptus fibers.

35. The structured tissue product of claim 1 , wherein the interior layer contains 10% cannabis fibers, 30% northern bleached softwood kraft fibers and 60% eucalyptus fibers.

36. The structured tissue product of claim 1 , wherein the second exterior layer contains 10% cannabis fibers, 20% northern bleached softwood kraft fibers and 70% eucalyptus fibers.

37. The structured tissue product of claim 1 , wherein the tissue product has a caliper of at least 450 microns/2 ply.

38. The structured tissue product of claim 1 , wherein the bulk softness (TS7) of the tissue product is 10 or less as measured using a Tissue Softness Analyzer.

39. A method of forming a structured tissue product, comprising:
depositing a slurry into a nip formed by a forming roll and at least one forming wire so as to form a nascent multi-layer web;
conveying the nascent multi-layer web on a structured fabric to a belt press;
dewatering the nascent multi-layer web on the structured fabric at the belt press;
transferring the nascent multi-layer web from the structured fabric to a steam heated cylinder;
drying the nascent multi-layer web at the steam heated cylinder;
creping the nascent multi-layer web off the steam heated cylinder so as to form a multi-layer web; and
converting the multi-layer web to a tissue product having at least two plies, the tissue product having a crumple resistance of less than 30 grams force and an average peak to valley depth of at least 65 microns, wherein:
a web that makes up one of the at least two plies comprises a first exterior layer, an interior layer and a second exterior layer;
the interior layer contains a first wet end additive comprising an ionic surfactant and a second wet end additive comprising a non-ionic surfactant; and
wherein the ratio of the ionic surfactant to

Assignees

• First Quality Tissue Llc

Inventors

• Miller Iv Byrd Tyler
• Pence Justin S
• Sealey James E

Classifications

• D21H27/002

  Tissue paper; Absorbent paper (D21H21/22, D21H27/02, D21H27/20 take precedence; toilet paper A47K10/00; absorbent pads for physiological fluids A61L15/16; making on paper-making machines D21F11/00) · CPC title

• D21H21/22

  Agents rendering paper porous, absorbent or bulky · CPC title

• D21H21/18

  Reinforcing agents · CPC title

• D21H17/375

  Poly(meth)acrylamide · CPC title

• D21H21/24 Primary

  Surfactants · CPC title