| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polystyrene resin based laminate foamed sheet that has high heat resistance and is excellent in impact resistance, productivity, and economical efficiency, and further to provide a container that is excellent in heat resistance, impact resistance, productivity, and economical efficiency obtained by using the laminate foamed sheet. <P>SOLUTION: The polystyrene based resin laminate foamed sheet is a laminate foamed sheet having a thickness of 0.5-3 mm obtained by laminating a first foam layer that makes a polystyrene based resin having a vicat softening temperature of at least 110°C a base material resin, and having an apparent density of 0.05-0.5 g/cm<SP POS="POST">3</SP>, and a second foam layer that makes a polystyrene based resin having a vicat softening temperature of less than 110°C a base material resin, and having an apparent density of 0.05-0.5 g/cm<SP POS="POST">3</SP>by coextrusion, wherein the polystyrene based resin having a vicat softening temperature of at least 110°C includes 10-50% by weight of a polyphenylene ether resin in the resin, and a closed cell ratio of the entire laminate foamed sheet is at least 80%. <P>COPYRIGHT: (C)2012,JPO&INPIT |
