Method for forming air permeable film
AssigneeKokushin Sangyo K.K.
InventorsKunio Sudo, Yoshitaka Matsuki, Eiji Inaba
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Abstract
PROBLEM TO BE SOLVED: To provide a method for forming a nonwoven fabric-like continuous film having elasticity and sufficiently air permeability on the surface of a substrate consisting of natural materials or plastic materials made of synthetic resins by solving the problem of single fibers and the problem of vapor of an organic solvent. SOLUTION: This method for forming the air permeable film consists in forming the air permeable film on the substrate surface by simultaneously spraying a hydrophilic organic solvent solution of linear polyurethane and water to the substrate surface and depositing and solidifying the polyurethane resin on the substrate surface.
Claims2
A method for forming an air permeable film on a surface of a substrate, which comprises concurrently spraying water and a solution of a linear polyurethane in a hydrophilic organic solvent against said surface of said substrate such that said polyurethane resin is caused to separate and solidify on said surface of said substrate.
Dependencies are inferred from the claim text.