| 摘要 |
PROBLEM TO BE SOLVED: To provide a styrene resin foam having low thermal conductivity and excellent thermal insulating properties, and a method for manufacturing the foam. SOLUTION: This styrene resin foam comprises a graphite powder, and has a density of 10-100 Kg/m<SP>3</SP>, a closed cell ratio of not less than 60%, and an average cell diameter of 20-1,000μm. The aspect ratio of the graphite powder is not less than 5. In the manufacturing method of the styrene resin foam, a styrene resin, the graphite powder and a dispersant are blended by means of an extruder, the mixture is then extruded, cooled, and pelletized. The graphite powder-containing styrene resin particles thus obtained are suspended in water into which a foaming agent is supplied, so as to obtain foamable styrene resin particles impregnated with the foaming agent. The particles are then subjected to foaming with heating followed by molding. A liquid paraffin is used as the dispersant. COPYRIGHT: (C)2005,JPO&NCIPI
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