Filaments comprising microfibrillar cellulose, fibrous nonwoven webs and process for making the same

摘要

Disclosed herein is a cellulosic textile filament made from microfibrillar cellulose fibers and a thickening agent as well as the precursor dope for forming such filaments, nonwoven webs made from such cellulosic textile filaments and the process for forming such filaments and nonwoven webs including such filaments. One of the advantages of these filaments is the eco-sensitive way in which they are made as they utilize a water-based dope that does not require any chemical solvents unlike other processes such as those used to make Lyocell fibers. In addition, the process does not involve any washing or extraction steps and it employs a cellulosic fiber source that is broadly based and renewable.

主权项

1. A cellulosic filament precursor dope comprising, based upon the total weight of said precursor dope, from about 7 to about 20 weight percent of microfibrillar cellulose fibers, about 0.2 to about 3 weight percent of a thickening agent and about 75 to about 95 weight percent of a water-based solvent, said microfibrillar cellulose fibers being dispersed in said solvent and said thickening agent being dissolved in said solvent, said precursor dope having a dynamic viscosity ranging from about 400 to about 3000 Pascal seconds at a shear rate of 100 reciprocal seconds.