| 摘要 |
PURPOSE:To obtain a porous body of uniform fine pores, free from residual substance, by molding a mixture of a crystalline resin and a depolymerizable polymer under shearing conditions to fiberize a part of the crystalline polymer, then removing the depolymerizable polymer by heating at a specific temperature. CONSTITUTION:A mixture of (A) a crystalline polymer such as polytetrafluoroe thylene with a liquid or waxy depolymerizable polymer such as polymethyl methacrylate is molded under shearing conditions to fiberize a part of the crys talline polymer. Then, the molded product is heated over the ceiling temperature of component B to remove it whereby the subject porous body is obtained. The starting mixture is preferably composed of 20-80vol.% of component A and 80-20vol.% of component B. |
