METHOD FOR MODIFYING SYNTHETIC FIBER AND SYNTHETIC RESIN WITH SULFUR TRIOXDE IN VAPOR-PHASE

摘要

PROBLEM TO BE SOLVED: To provide a method for imparting various functions to synthetic fibers or synthetic resins. SOLUTION: The synthetic fibers or synthetic resin in brought into contact with sulfur trioxide gas and then washed with a wash liquid comprising water or an aqueous solution of an alkali metal salt.