COLLAGEN FIBER GOOD IN WATER RESISTANCE

摘要

PURPOSE:To provide a regenerated fiber completely free from a color and excellent in water resistance by adding a specific amount of an aluminum salt to a regenerated collagen fiber. CONSTITUTION:The split leather of an animal is treated by an alkali solubilizing method or by an enzymatic solubilizing method, and the produced solubilized collagen is dissolved in an acidic solution prepared from an inorganic acid, an organic acid, etc., and subsequently spun into water-swollen regenerated collagen fibers, which are immersed in an aqueous solution of a basic aluminum chloride to produce regenerated collagen fibers containing the aluminum chloride in an amount of 8-20wt.% expressed in terms of aluminum oxide. The produced regenerated collagen fibers never have such a color as produced by a conventional treatment using a chromium salt, and are excellent in water resistance. The aluminum salt is preferably basic aluminum chloride or basic aluminum sulfate.