| 摘要 |
PROBLEM TO BE SOLVED: To provide a foamed molding having improved vessel strength, thermal insulating properties, lightweight property and dimensional stability. SOLUTION: Disclosed is a foamed molding obtained by heating and semi-melting a foamed laminated sheet having structure of three kinds-five layers where on both the sides of a foamed layer (C layer) obtained by being foamed so as to be the foaming magnification of 1.1 to 5 times and the volume percentage of open cells satisfying≤15%, composite material layers (B layers) each obtained by molding a resin composite material composed of a filler of 3 to 60 wt.% and a polyolefin based resin of 97 to 40 wt.% are laminated, and further, on both the sides thereof, non-foamed layers (A layers) obtained by molding a resin material essentially composed of a propylene based resin whose MFR (at the temperature of 230°C, and at the load of 21.18 N) is 1 to 50 g/10 min, are laminated, wherein, the ratio of the A layers occupying the cross-section of the foamed laminated sheet is 0.01 to 15%, the ratio of the B layers is 4.99 to 80%, the ratio of the C layer is 19.99 to 95%, and the specific gravity of the foamed laminated sheet is 0.1 to 1.0 g/cm3, and thereafter applying a shape thereto by a both side vacuum molding process. COPYRIGHT: (C)2009,JPO&INPIT |
