Patent ID: 6391233
Filing Date: 2002-05-21
Classification: B29C

Abstract:
A method of producing a porous product, comprising the steps of:preparing a molded product by subjecting a molding material containing a polymer component and a pore-forming agent dispersed in the polymer component, the pore-forming agent assuming a solid state at a room temperature, to molding at a temperature which causes the molding material having the pore-forming agent to substantially completely melt; and soaking the molded product with a solvent which dissolves the pore-forming agent but fails to dissolve the polymer component, to form pores, wherein the pore-forming agent is a polyvalent alcohol having a melting point of 40Â° C. to 300Â° C. that melts at the molding temperature of the polymer component, and the molded product is prepared by injection molding or extrusion molding.