Cannabis fiber, absorbent cellulosic structures containing cannabis fiber and methods of making the same

Patent metadata

Field	Value
Publication number	US-9988763-B2
Application number	US-201514939675-A
Country	US
Kind code	B2
Filing date	Nov 12, 2015
Priority date	Nov 12, 2014
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A method to prepare, pulp, and bleach cannabis bast and hurd fibers to allow for the fiber to be incorporated into absorbent cellulosic structures on a wet-laid paper machine while keeping the pectin within the fibers. The wet laid paper machine can use the ATMOS, NTT, ETAD, TAD, or UCTAD method to produce the absorbent cellulosic structure. Absorbent cellulosic structures are produced with the cannabis bast and hurd fibers or with the bast fibers alone with the hurd fibers being combined with paper mill sludge or dust to form a fuel pellet.

First claim

The invention claimed is:

1. A base sheet that forms a single ply of a bath tissue, facial tissue or towel product, the base sheet comprising at least three layers, at least one of the layers comprising northern bleached softwood kraft pulp fiber and cannabis fiber that contains at least 50% by weight of original amount of pectin contained in the cannabis fiber prior to processing.

2. The base sheet of claim 1 , wherein two base sheets are plied together to form a two ply bath or facial tissue product.

3. The base sheet of claim 2 , wherein the bath or facial tissue product has a basis weight between 20 to 45 g/m 2 .

4. The base sheet of claim 3 , wherein the bath or facial tissue product has a basis weight of 32 to 38 g/m 2 .

5. The base sheet of claim 2 , wherein the bath or facial tissue product has a caliper of 0.200 mm to 0.700 mm.

6. The base sheet of claim 5 , wherein the bath or facial tissue product has a caliper of 0.525 to 0.650 mm.

7. The base sheet of claim 5 , wherein the bath or facial tissue product has a caliper of 0.575 mm to 0.625 mm.

8. The base sheet of claim 2 , wherein the bath or facial tissue product has a machine direction tensile strength of 100 N/m to 190 N/m.

9. The base sheet of claim 8 , wherein the bath or facial tissue product has a machine direction tensile strength of 120 N/m to 170 N/m.

10. The base sheet of claim 2 , wherein the bath or facial tissue product has a cross direction tensile strength of 25 N/m to 125 N/m.

11. The base sheet of claim 10 , wherein the bath or facial tissue product has a cross direction tensile strength of 50 N/m to 100 N/m.

12. The base sheet of claim 2 , wherein the bath or facial tissue product has a ball burst of 100 to 300 grams force.

13. The base sheet of claim 12 , wherein the bath or facial tissue product has a ball burst of 175 to 275 grams force.

14. The base sheet of claim 2 , wherein the bath or facial tissue product has a lint value of 2 to 10.

15. The base sheet of claim 2 , wherein the bath or facial tissue product has a lint value of 3 to 6.

16. The base sheet of claim 2 , wherein the bath or facial tissue product has a machine direction stretch of 10% to 30%.

17. The base sheet of claim 16 , wherein the bath or facial tissue product has a machine direction stretch of 20% to 30%.

18. The base sheet of claim 2 , wherein the bath or facial tissue product has a TSA value of 80 to 120.

19. The base sheet of claim 18 , wherein the bath or facial tissue product has a TSA value of 90 to 110.

20. The base sheet of claim 2 , wherein the bath or facial tissue product has a TS7 value of 5 to 15.

21. The base sheet of claim 20 , wherein the bath or facial tissue product has a TS7 value of 7 to 10.

22. The base sheet of claim 2 , wherein the bath or facial tissue product has a TS750 value of 10 to 20.

23. The base sheet of claim 22 , wherein the bath or facial tissue product has a TS750 value of 10 to 15.

24. The base sheet of claim 1 , wherein two base sheets are plied together to form a two ply towel product.

25. The base sheet of claim 24 , wherein the towel product has a basis weight of 20 g/m 2 to 70 g/m 2 .

26. The base sheet of claim 25 , wherein the towel product has a basis weight of 30 g/m 2 to 40 g/m 2 .

27. The base sheet of claim 25 , wherein the towel product has a basis weight of 32 g/m 2 to 38 g/m 2 .

28. The base sheet of claim 24 , wherein the towel product has a caliper of 0.500 mm to 1.200 mm.

29. The base sheet of claim 28 , wherein the towel product has a caliper of 0.700 mm to 1.000 mm.

30. The base sheet of claim 28 , wherein the towel product has a caliper of 0.850 mm to 1.000 mm.

31. The base sheet of claim 24 , wherein the towel product has a machine direction tensile strength of 300 N/m to 700 N/m.

32. The base sheet of claim 31 , wherein the towel product has a machine direction tensile strength of 300 N/m to 500 N/m.

33. The base sheet of claim 24 , wherein the towel product has a cross direction tensile strength of 300 N/m to 700 N/m.

34. The base sheet of claim 33 , wherein the towel product has a cross direction tensile strength of 300 N/m to 500 N/m.

35. The base sheet of claim 24 , wherein the towel product has a ball burst value of 500 grams force to 1500 grams force.

36. The base sheet of claim 35 , wherein the towel product has a ball bust value of 800 grams force to 1500 grams force.

37. The base sheet of claim 24 , wherein the towel product has a machine direction stretch of 10% to 30%.

38. The base sheet of claim 37 , wherein the towel product has a machine direction stretch of 10% to 20%.

39. The base sheet of claim 24 , wherein the towel product has an absorbency of 500 gsm to 1000 gsm.

40. The base sheet of claim 39 , wherein the towel product has an absorbency of 600 gsm to 800 gsm.

41. The base sheet of claim 24 , wherein the towel product has a TSA value of 40 to 80.

42. The base sheet of claim 41 , wherein the towel product has a TSA value of 50 to 70.

43. The base sheet of claim 1 , wherein two or more base sheets are plied together to form a multi-ply tissue or towel product.

Assignees

• First Quality Tissue Llc

Inventors

• Ramaratnam Karthik
• Sealey Ii James E
• Miller Iv Byrd Tyler
• Andrukh Taras Z
• Elgin Randy H

Classifications

• D21H27/30 Primary

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

• D21C5/00

  Other processes for obtaining cellulose, e.g. cooking cotton linters (obtaining fibres for spinning D01C); {Processes characterised by the choice of cellulose-containing starting materials} · CPC title

• D21F11/14

  Making cellulose wadding, filter or blotting paper · CPC title

• D21C9/10

  Bleaching {; Apparatus therefor} · CPC title

• D21H11/12 Primary

  Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse · CPC title