Processing cellulose acetate formed articles using supercritical fluid

摘要

A process for preparing cellulose acetate articles such as fibers, is claimed herein. The process comprises the following steps: Cellulose acetate is dissolved in a solvent to form a solution, the solvent made up of from 5% to 50% by weight of carbon dioxide and from 95% to 50% of a compatible solvent such as acetone. The solvent is above the supercritical conditions of CO₂. The solution is filtrated of insoluble matter and extended to form a fiber or similar article.