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 mil. The microfibers are selected and present in amounts such that the wiper exhibits a capillary pressure at 10% saturation by extrusion porosimetry of at least twice that of a like sheet prepared without regenerated independent cellulose microfibers.
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 mil,
the microfibers being selected and present in amounts such that the wiper exhibits a capillary pressure at 10% saturation by extrusion porosimetry of at least twice that of a like sheet prepared without fibrillated regenerated independent cellulose 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 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 capillary pressure at 10% saturation by extrusion porosimetry from about 2 to about 10 times that of a like sheet prepared without fibrillated regenerated independent cellulosic microfibers.
7. The disposable cellulosic wiper according to claim 1 , wherein the wiper exhibits a capillary pressure at 10% saturation by extrusion porosimetry at least three times that of a like sheet prepared without fibrillated regenerated independent cellulosic microfibers.
8. The disposable cellulosic wiper according to claim 1 , wherein the wiper exhibits a capillary pressure at 10% saturation by extrusion porosimetry at least four times that of a like sheet prepared without fibrillated regenerated independent cellulosic microfibers.
9. The disposable cellulosic wiper according to claim 1 , wherein the wiper exhibits a capillary pressure at 10% saturation by extrusion porosimetry at least five times that of a like sheet prepared without fibrillated regenerated independent cellulosic microfibers.