Patent ID: 7128797
Filing Date: 2006-10-31
Classification: B29C,B29K,B29L,B32B,B65D,C08J,Y10S,Y10T

Abstract:
1. A process for making a strengthened polystyrene load bearing structure, comprising the steps of: providing a forming mold adapted to hold an expanded polystyrene core; retaining said expanded polystyrene core within the mold with a first side of the core and at least half the thickness of the core extend therefrom; heating a first high impact polystyrene sheet; and chemically combining the first sheet with the first side of the core, wherein portions of said core that extend from said mold contact said sheet; removing the core from the mold and reinserting the core in the mold, wherein a second side of the core and at least half the thickness of the core extend therefrom; heating a second high impact polystyrene sheet; and substantially surrounding the core with the second sheet.