METHOD OF PRODUCING VULCANIZED FIBER

摘要

PROBLEM TO BE SOLVED: To provide a vulcanized fiber improved in flexibility.SOLUTION: A method of producing a vulcanized fiber includes a step of immersing base paper based on natural fiber in an aqueous solution of a reaction chemical having properties of swelling and gelatinizing pulp to swell and gelatinize the surface of the base paper, a deliquoring step of removing the aqueous solution swelling and gelatinizing pulp from the base paper with a cleaning solution to obtain a base material and a drying and finishing step of drying and finishing the base material, and the base material after the deliquoring step is impregnated or applied with a nitrogen-containing sulfur-containing water-soluble compound.