High efficiency disposable cellulosic wiper
View Patent ↗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 wicking ratio of at least 1.5.
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 wicking ratio of at least 1.5.
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 exhibits a relative wicking ratio of at least 2.
7. The disposable cellulosic wiper according to claim 1 , wherein the wiper exhibits a relative wicking ratio of at least 3.
8. The disposable cellulosic wiper according to claim 1 , wherein the wiper exhibits a relative wicking ratio of from 1.5 to about 5.
9. 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.
10. 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.
11. 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.
12. The disposable cellulosic wiper according to claim 1 , wherein the wiper contains kraft softwood fibers and the fibrillated regenerated independent cellulosic microfibers.
13. 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.
14. 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.