| 摘要 |
PROBLEM TO BE SOLVED: To provide a void between porous cells which present an excellent strength without adding an inorganic filler. SOLUTION: As raw material beads for expansion, mixed beads of a synthetic resin expansion bead which forms the porous cell 2 (displayed by a white pattern) as shown in a copied torn surface of a porous molded body in the figure by expansion molding, and an organic expansion bead being a different kind from the synthetic resin expansion bead are used, and the mixed beads are heat-treated in a specified molding die. Thus, the synthetic resin expansion beads are expanded and fused, and the porous cells 2 which are fused with each other are mainly formed. At the same time, by melting and liquefying the organic expansion beads of the different kind, the volume of itself is contracted, and numerous voids 3 (displayed by a speckle pattern) are formed at a part between the porous cells 2. COPYRIGHT: (C)2004,JPO&NCIPI
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