| 摘要 |
PROBLEM TO BE SOLVED: To provide a polystyrenic resin foam sheet having excellent properties in lightness and fabricability as compared to the conventional ones, and to provide a foamed container having light-weight and high quality.SOLUTION: A polystyrenic resin foam sheet is a polystyrenic resin foam sheet produced by extrusion-foaming the resin composition comprising polystyrenic resin, and the polystyrenic resin is characterized in that the melt flow rate is 1.0 g/10 minutes or more and 3.0 g/10 minutes or less, the Z average molecular weight (Mz) is 300,000 or more and less than 600,000, and the value (Mz/Mw) obtained by dividing the Z average molecular weight by weight average molecular weight (Mw) is more than 1 and less than 1.9. |
