| 摘要 |
PROBLEM TO BE SOLVED: To provide an expandable polystyrene resin particles having a heat resistance within±0.5% of the dimensional change rate when heating at 90°C for 168 hours, having excellent thermal insulation property, and having excellent filling property into a cavity upon molding. SOLUTION: A polystyrene expansion molded product is obtained by: dispersing polystyrene resin particles having 5-15% of a coefficient of variation (CV value) of the particle diameter of the polystyrene resin particles; supplying a flame-retardant solution obtained by dissolving 33-1,000 pts.wt. of a tetrabromocyclooctane, which is a powdery flame retardant, and 20-200 pts.wt. of a flame retardant aid, which has a 1-hour half-life temperature of 100-250°C with respect to 100 pts.wt. of a plasticizer, to the aqueous suspension before or during the infiltration of a blowing agent; prefoaming using the expandable polystyrene resin particles, wherein the flame retardant and flame retardant aid are impregnated in the polystyrene resin particles; and filling and foaming the prefoamed particles into a mold. Further, its mean bowstring length is 30-380μm. COPYRIGHT: (C)2011,JPO&INPIT
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