| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a leather material using an aqueous polyurethane resin in consideration of the problems of environmental load or VOCs (volatile organic compounds) which is capable of efficiently and surely providing a leather material in which migration is prevented, the thickness of a fiber base material is maintained, and has excellent rubbing fastness at a suitable solidification temperature without generating odor, and to provide a leather material obtained by the production method.SOLUTION: The method for producing a leather material includes the steps of: impregnating a fiber base material with a mixed liquid of (A) an aqueous polyurethane resin having an anionic group, (B) at least one inorganic acid ammonium salt selected from the group consisting of ammonium sulfate, ammonium phosphate, and ammonium chloride, (D) a nonionic surfactant having a weight average molecular weight of 2,000 to 10,000,000 and contains 75 mass% or more of an oxyalkylene group in the molecule, and (E) water; and then drying the impregnated fiber based material to obtain a leather material. |
