High Strength Acetate Fiber Spinning

강력 아세테이트 섬유 제조

Cellulose acetate dissolved in a combination of trifluoroacetic acid and methylene chloride solution is liquid crystalline above a certain concentration. The main objectives of the work reported here were; 1) to show the mesophase formation of CDA that occurs in solution state. 40% CDA solutions in TFA/CH2C12(6/4,v/v) were liquid crystalline and showed low enough viscosity for spinning. 2) to develop regenerated cellulosic fibers from the mesomorphic state. Solutions which were mesomorphic were spun into a methanol bath and relatively strong cellulosic filaments were successfully produced using air-gap spinning equipment. Analysis showed that the semirigid CDA polymer chains in liquid crystalline solution straighten away from the others and this high orientation renders relatively high strength to CDA fibers.