| 摘要 |
PROBLEM TO BE SOLVED: To provide a sliced article of expanded polystyrene resin free from margin of melt cutting with Nichrome wire in the particle and between the particles, imparting an even and flat cut face, and to provide a suitable material for producing the same. SOLUTION: The invention relates to the sliced article of expanded polystyrene resin obtained by pre-expansion and in-mold expansion of the expandable polystyrene particle and then cutting the expansion molded article by Nichrome wire, wherein the total polystyrene resin particle has 33-50×10<SP>4</SP>of weight average molecular weight, and the expandable polystyrene resin particle has 0.5-5% of molecular weight degradation rate (%) calculated according to the following formula (1), in the formula (X) is a weight average molecular weight of the surface layer of the polystyrene particle, (Y) is a weight average molecular weight of the whole of particle. Formula (1); molecular weight degradation rate (%)=(Y-X)/Y×100. COPYRIGHT: (C)2007,JPO&INPIT
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