Patent ID: 9636854
Date: 2017-05-02
CPC Classifications: B29C,B29K,B29L,B32B,C08J,C08L,Y10T

Claim:
1. A method for producing a skin-covered foamed molded article, the method comprising the steps of: (a) providing a parison that is in a molten or softened state, the parison being formed of a polystyrene resin composition; (b) blow molding the parison into a skin defining a hollow interior space; (c) filling expanded polystyrene beads in the hollow interior space; and (d) heating the expanded polystyrene beads filled in the hollow interior space to fuse-bond the expanded polystyrene beads to each other and to form a foam layer fuse-bonded to the skin, wherein step (a) comprises: wherein the polystyrene resin composition meets the following requirements (1) to (3): (1) the polystyrene resin composition has a Charpy impact strength at 23° C. according to ISO179/1eA of at least 5 kJ/m (2) the polystyrene resin composition has a melt mass flow rate at a temperature of 200° C. and a load of 5 kg of 1.5 to 3.0 g/10 min; (3) the polystyrene resin composition has a branching degree defined as Mw wherein the polystyrene resin (A) comprises a copolymer of a styrenic monomer with a multibranched macromonomer having a plurality of polymerizable double bonds.