METHOD FOR APPLYING SHAPE TO REGENERATED COLLAGEN FIBER

摘要

PROBLEM TO BE SOLVED: To obtain a wig, etc., having improved shape-memory effect while suppressing the generation of crimp and shrinkage by subjecting a regenerated collagen fiber to a wet treatment with a specific aqueous solution and heating the product to apply a fixed shape to the regenerated collagen fiber. SOLUTION: A regenerated collagen fiber is subjected to wet-treatment with an aqueous solution containing a sulfate of a univalent cation such as Li2 SO4 or a bivalent cation such as MgSO4 (the pH of the solution is preferably 5-10) at the time of applying the desired shape and the treated fiber is heated while keeping wet state to impart the regenerated collagen fiber with fixed shape. The concentration of the sulfate is preferably from 5% to the saturated concentration.