The formation method of Chinese Communist fiber without skin collapse and the resulting cigarette filter

摘要

Skinless shaped articles having increased specific surface area and based on cellulose esters, including both solid and hollow fibers (1A), can be produced with at least one surface having a striated or fibrous appearance (1C) and a cellular interior structure (1B) by extruding a spinning solution comprising a cellulose ester and a solvent therefor directly into an aqueous bath, wherein the residual content of solvent in the bath is maintained at a concentration below a critical level, preferably less than about 10 weight percent.