High efficiency disposable cellulosic wiper for cleaning residue from a surface

Patent metadata

Field	Value
Publication number	US-9655490-B2
Application number	US-201615097394-A
Country	US
Kind code	B2
Filing date	Apr 13, 2016
Priority date	Mar 21, 2006
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

A disposable cellulosic wiper includes a percentage by weight of pulp-derived papermaking fibers, and from about 10% to about 75% by weight of fibrillated regenerated independent cellulosic microfibers having a number average diameter of less than about 2 microns and a characteristic Canadian Standard Freeness (CSF) value of less than 175 ml.

First claim

We claim:

1. A disposable cellulosic wiper comprising:
(a) a percentage by weight of pulp-derived papermaking fibers; and
(b) from about 10% to about 75% by weight of fibrillated regenerated independent cellulosic microfibers having a number average diameter of less than about 2 microns and a characteristic Canadian Standard Freeness (CSF) value of less than 175 ml.

2. The disposable cellulosic wiper according to claim 1 , wherein the percentage by weight of the pulp-derived papermaking fibers is 25% or more.

3. The disposable cellulosic wiper according to claim 1 , wherein the wiper includes more than 25% by weight of the fibrillated regenerated independent cellulosic microfibers.

4. The disposable cellulosic wiper according to claim 1 , wherein the wiper includes more than 30% by weight of the fibrillated regenerated independent cellulosic microfibers.

5. The disposable cellulosic wiper according to claim 1 , wherein the wiper includes more than 35% by weight of the fibrillated regenerated independent cellulosic microfibers.

6. The disposable cellulosic wiper according to claim 1 , wherein the wiper includes more than 40% by weight of the fibrillated regenerated independent cellulosic microfibers.

7. The disposable cellulosic wiper according to claim 1 , wherein the fibrillated regenerated independent cellulosic microfibers have a CSF value of less than 150 ml.

8. The disposable cellulosic wiper according to claim 1 , wherein the fibrillated regenerated independent cellulosic microfibers have a CSF value of less than 100 ml.

9. The disposable cellulosic wiper according to claim 1 , wherein the fibrillated regenerated independent cellulosic microfibers have a CSF value of less than 50 ml.

10. The disposable cellulosic wiper according to claim 1 , wherein the fibrillated regenerated independent cellulosic microfibers have a CSF value of less than 25 ml.

11. The disposable cellulosic wiper according to claim 1 , wherein the fibrillated regenerated independent cellulosic microfibers have a CSF value of less than 0 ml.

12. The disposable cellulosic wiper according to claim 1 , wherein the wiper has a basis weight of from about 5 lbs per 3,000 square foot ream to about 60 lbs per 3,000 square foot ream, and the fibrillated regenerated independent cellulosic microfibers have a weight average diameter of less than 2 microns and a weight average length of less than 500 microns.

13. The disposable cellulosic wiper according to claim 1 , wherein the wiper has a basis weight of from about 15 lbs per 3,000 square foot ream to about 35 lbs per 3,000 square foot ream, and the fibrillated regenerated independent cellulosic microfibers have a weight average diameter of less than 1 micron and a weight average length of less than 400 microns.

14. The disposable cellulosic wiper according to claim 1 , wherein the wiper has an absorbency of at least about 4 g/g.

15. The disposable cellulosic wiper according to claim 1 , wherein the wiper has an absorbency of at least about 4.5 g/g.

16. The disposable cellulosic wiper according to claim 1 , wherein the wiper has an absorbency of at least about 5 g/g.

17. The disposable cellulosic wiper according to claim 1 , wherein the wiper has an absorbency of at least about 7.5 g/g.

18. The disposable cellulosic wiper according to claim 1 , wherein the wiper has an absorbency of from about 6 g/g to about 9.5 g/g.

19. The disposable cellulosic wiper according to claim 1 , wherein the fibrillated regenerated independent cellulosic microfibers are prepared from fiber spun from a cellulosic dope comprising cellulose dissolved in a tertiary amine N-oxide, and have a weight average diameter of less than 2 microns and a weight average length of less than 500 microns.

20. The disposable cellulosic wiper according to claim 1 , wherein the fibrillated regenerated independent cellulosic microfibers are prepared from fiber spun from a cellulosic dope comprising cellulose dissolved in an ionic liquid, and have a weight average diameter of less than 1 micron and a weight average length of less than 400 microns.

21. The disposable cellulosic wiper according to claim 1 , wherein the wiper has a dry machine direction (MD) breaking length of from about 2 km to about 9 km, and the fibrillated regenerated independent cellulosic microfibers have a weight average diameter of less than 2 microns and a weight average length of less than 500 microns.

22. The disposable cellulosic wiper according to claim 1 , wherein the wiper has a cross machine direction (CD) wet breaking length of from about 400 m to about 3000 m, and the fibrillated regenerated independent cellulosic microfibers have a weight average diameter of less than 1 micron and a weight average length of less than 400 microns.

23. The disposable cellulosic wiper according to claim 1 , wherein the wiper has a wet/dry cross machine direction (CD) tensile ratio of between about 35% and about 60%.

24. The disposable cellulosic wiper according to claim 1 , wherein the wiper has a wet/dry cross machine direction (CD) tensile ratio of at least about 40%.

25. The disposable cellulosic wiper according to claim 1 , wherein the wiper has a wet/dry cross machine direction (CD) tensile ratio of at least about 45%.

26. The disposable cellulosic wiper according to claim 1 , wherein the wiper further comprises a dry strength resin.

27. The disposable cellulosic wiper according to claim 26 , wherein the dry strength resin is carboxylmethyl cellulose.

28. The disposable cellulosic wiper according to claim 1 , wherein the wiper further comprises a wet strength resin.

29. The disposable cellulosic wiper according to claim 28 , wherein the wet strength resin is a polyamidamine-epihalohydrin resin.

30. The disposable cellulosic wiper according to claim 1 , wherein the wiper has a machine direction (MD) break modulus of from about 50 g/3 in./% to about 400 g/3 in./%.

31. The disposable cellulosic wiper according to claim 1 , wherein the wiper has a machine direction (MD) break modulus of from about 20 g/3 in./% to about 100 g/3 in./%.

32. The disposable cellulosic wiper according to claim 1 , wherein the wiper comprises from about 30% by weight to about 75% by weight of the pulp-derived papermaking fibers and up to 70% by weight of the fibrillated regenerated independent cellulosic microfibers.

33. The disposable cellulosic wiper according to claim 1 , wherein the wiper comprises from about 35 by weight to about 70% by weight of the pulp-derived papermaking fibers and from about 30% by weight to about 65% by weight of the fibrillated regenerated independent cellulosic microfibers.

34. The disposable cellulosic wiper according to claim 1 , wherein the wiper comprises from about 40% by weight to about 60% by weight of the pulp-derived papermaking fibers and from about 40% by weight to about 60% by weight of the fibrillated regenerated independent cellulosic microfibers.

35. The disposable cellulosic wiper according to claim 1 , wherein the wiper contains kraft softwood fibers and the fibrillated regenerated independent cellulosic microfibers.

36. The disposable cellulosic wiper according to claim 1 , wherein the fibrillated regenerated independent cellulosic microfibers are prepar

Assignees

• Georgia Pacific Consumer Products Lp

Inventors

• Sumnicht Daniel W
• Miller Joseph H

Classifications

• Y10T428/2904

  Staple length fiber · CPC title

• D21H11/20

  Chemically or biochemically modified fibres · CPC title

• B08B1/006

  Operations & Transport · mapped topic

• D21H13/08

  from regenerated cellulose · CPC title

• D21H21/18 Primary

  Reinforcing agents · CPC title