Patent ID: 7534380
Filing Date: 2009-05-19
Classification: D01F,D02G

Abstract:
1. A process for making a cellulose acetate tow comprising the steps of: spinning a dope comprising a solution of cellulose acetate and solvent, taking-up the as-spun cellulose acetate filaments, lubricating the cellulose acetate filaments, forming a tow from the cellulose acetate filaments, crimping the tow by means of a stuffer box crimper comprising a pair of nip rollers adapted to engage the tow, a pair of cheek plates juxtaposed to said pair of nip rollers adapted to keep the tow between said pair of nip rollers, a pair of doctor blades adjacent to an exit end of said pair of nip rollers adapted to prevent the tow from sticking to said pair of nip rollers, and a stuffer box having a stuffer channel adjacent said pair of doctor blades adapted to receive the tow into said channel from said pair of nip rollers, a flapper located at a distal end of said channel adapted to bearingly engage the tow, and a steam injector in communication with said channel and located between said pair of doctor blades and said flapper, drying the crimped tow, and baling the dried crimped tow.