Patent ID: 7718036

Claim:
An absorbent paper sheet for tissue or towel comprising from about 99 percent to about 70 percent by weight of pulp-derived papermaking fiber and from about 1 to about 30 percent by weight of fibrillated regenerated cellulose microfiber prepared from a cellulosic dope of dissolved cellulose comprising a solvent selected from: tertiary amine N-oxides; cellulose dissolving imidazolium salts; cellulose dissolving pyridinium salts; cellulose dissolving pyridazinium salts; cellulose dissolving pyrimidinium salts; cellulose dissolving pyrazinium salts; cellulose dissolving pyrazolium salts; cellulose dissolving oxazolium salts; cellulose dissolving 1,2,3-triazolium salts; cellulose dissolving 1,2,4-triazolium salts; cellulose dissolving thiazolium salts; cellulose dissolving piperidinium salts; cellulose dissolving pyrrolidinium salts; cellulose dissolving quinolinium salts; and cellulose dissolving isoquinolinium, salts, the microfiber having a CSF value of less than 100 ml, wherein the fibrillated regenerated cellulose has a weight average diameter of less than 1 micron, a weight average length of less than 400 microns and a fiber count of greater than 2 billion fibers/gram.