MANUFACTURING METHOD OF OPEN CELL POLYMER FOAM

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of an open cell polymer foam. SOLUTION: The manufacturing method of the polymer foam of an open cell structure having a diameter of 1-500μm comprises impregnating a polymer having a storage elastic modulus of 1.0-2.5 MPa and a loss elastic modulus of 250-400 kPa at the impregnation temperature with a substance, which is gaseous at ordinary temperature, in a supercritical state and at a pressure of at least 7.0 MPa and a temperature of not more than 30°C lower than the melting point and lower than the melting point and subsequently decreasing the pressure at a pressure-reducing rate of 0.1-1.0 MPa/s. COPYRIGHT: (C)2005,JPO&NCIPI