Expandable styrene resin particles include 2.0 wt % to 8.0 wt % of graphite, and the graphite has a mean particle size of 2.5 μm to 9 μm. The expandable styrene resin particles satisfy (i) a laser scattering intensity per unit solution concentration of the graphite is not less than 5 %/(mg/ml)}/wt %, (ii) an area of the graphite per unit solution concentration of the graphite in 1 mm2 is not less than 55 (mm2/mm2}/g/g}), or (iii) when the expandable styrene resin particles are pre-expanded and are made into an expanded molded product having an expansion ratio of 40 times, a value (%/wt %) obtained by dividing, by the content of the graphite (wt %), a percentage of an area occupied by the graphite in a surface layer of the expanded molded product (%), a quotient of which is further multiplied by 100, is not less than 100.
可膨胀
苯乙烯树脂颗粒包括 2.0 wt % 至 8.0 wt % 的石墨,石墨的平均粒径为 2.5 μm 至 9 μm。可膨胀
苯乙烯树脂颗粒满足 (i) 每单位溶液浓度的石墨的激光散射强度不小于 5 %/(mg/ml)}/wt %,(ii) 每单位溶液浓度的石墨在 1 mm2 中的面积不小于 55 (mm2/mm2}/g/g})、或 (iii) 当可膨胀
苯乙烯树脂颗粒经过预膨胀并制成膨胀率为 40 倍的膨胀模塑产品时,用石墨含量(重量百分比)除以石墨在膨胀模塑产品表层所占面积的百分比(百分比),再乘以商 100 得出的值(%/重量百分比)不小于 100。