| 摘要 |
PROBLEM TO BE SOLVED: To provide an expandable polystyrene-based resin particle that gives an expanded molded article having both strength and flexibility, and has a long beads-life because the expandable resin particle loses the used foaming agent moderately. SOLUTION: The expandable polystyrene-based resin particle is produced by mixing a first expandable polystyrene-based resin particle with a second expandable polystyrene-based resin particle in a range of 20:80 to 90:10, wherein, the first expandable polystyrene-based resin particle is obtained by impregnating a polystyrene-based resin particle with a first foaming agent consisting mainly of a 4C hydrocarbon, and the second expandable polystyrene-based resin particle is obtained by mixing and kneading a polystyren-based resin with a second foaming agent consisting mainly of a 5C hydrocarbon in a resin-feeding device, extruding the foaming agent-containing molten resin through a small hole of a die attached at a pointed head of the resin feeding device into a cooling liquid directly, and cutting the extruded material simultaneously with the extrusion, thereby being cooled and solidified due to contact of the extruded material with the laiquid. COPYRIGHT: (C)2011,JPO&INPIT
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