IP Library › Granted Patent US 9,271,622
Granted Patent B2
US 9,271,622 · App. 14/596,271 · Granted Mar 1, 2016

High efficiency disposable cellulosic wiper

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Quick Facts
Patent No.
US 9,271,622
App. No.
14/596,271
Filed
Jan 14, 2015
Granted
Mar 1, 2016
Kind
B2
Art Unit
1741
USPC
162/146
Abstract

A disposable cellulosic wiper includes a percentage by weight of pulp-derived papermaking fibers, and a percentage by weight of 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. The microfibers are selected and present in amounts such that the wiper exhibits a relative water residue removal efficiency of at least 150% as compared with a like sheet without regenerated independent cellulosic microfibers.

Claims (13)

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,

the microfibers being selected and present in amounts such that the wiper exhibits a relative water residue removal efficiency of at least 150% as compared with a like sheet without fibrillated regenerated independent cellulosic microfibers.

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 30% by weight of the fibrillated regenerated independent cellulosic microfibers.

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

5. The disposable cellulosic wiper according to claim 1 , wherein the wiper exhibits a relative water residue removal efficiency of at least 200% as compared with a like sheet without fibrillated regenerated independent cellulosic microfibers.

6. The disposable cellulosic wiper according to claim 1 , wherein the wiper exhibits a relative water residue removal efficiency of at least 300% as compared with a like sheet without fibrillated regenerated independent cellulosic microfibers.

7. The disposable cellulosic wiper according to claim 1 , wherein the wiper exhibits a relative water residue removal efficiency of at least 400% as compared with a like sheet without fibrillated regenerated independent cellulosic microfibers.

8. The disposable cellulosic wiper according to claim 1 , wherein the wiper exhibits a relative water residue removal efficiency of from 150% to about 1,000% as compared with a like sheet without fibrillated regenerated independent cellulosic microfibers.

9. The disposable cellulosic wiper according to claim 1 , wherein the wiper comprises from less than 30% by weight to about 65% by weight of the pulp-derived papermaking fibers and from about 15% by weight to more than 35% by weight of the fibrillated regenerated independent cellulosic microfibers.

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