| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polystyrenic resin laminated foamed sheet capable of being accurately molded into a desired shape under a stable molding condition without producing a drawdown phenomenon at the time of molding. <P>SOLUTION: This long polystyrenic resin laminated foamed sheet is constituted by integrally laminating a polystyrenic resin non-foamed sheet layer on one side of a polystyrenic resin foamed sheet layer, which is obtained by extrusion foaming, by a coextrusion method and, when it is heated at 125°C for 150 s, the surface of the polystyrenic resin non-foamed sheet layer is shrunk in a dimensional change ratio of -45 to -15°C in its lateral direction to deform the polystyrenic resin laminated foamed sheet into an arcuate shape in its lateral direction so that the polystyrenic resin non-foamed sheet layer becomes inside. <P>COPYRIGHT: (C)2007,JPO&INPIT |
