Manufacture of composite material for lightweight goods e.g. sports equipment, comprises a particulate thermoplastic plastic foam and another layer in which foam particles are hot pressed with another layer and tempered during cooling

摘要

A particulate foam of polyalkyleneterephthalate, or a blend of this with a low crystalline content in a chiefly amorphous phase, is heated and pressed to form a component. During the pressing stage the foam is joined with another layer (3) and/or is tempered at a temperature which converts more of the amorphous phase into a crystalline phase. Independent claims are also included for: a) a composite material comprising particulate foam (2) and another layer produced by the claimed process; b) a component (5a) molded from the composite material; c) use of the component in vehicles, garden furniture, surf boards, boat bodies, packaging, insulating containers or housings; d) various process for producing the component in which: i) prefoamed polyalkyleneterephthalate particles are heated and pressed into a component, tempered during a cooling stage and a cover layer (3) is laminated on; ii) densely packed foamed particles are heated in a mold and foamed onto the rear of a cover layer in a mold and then cooled during which time the foam is tempered; iii) prefoamed polyalkyleneterephthalate particles are placed in a mold cavity with an intermediate layer (4) comprising PET (polyethyleneterephthalate) fibers and further reinforcing fibers, heated to fuse with the PET fibers, a fluid, solidifiable or curable polymer applied and during a cooling stage the molding is tempered.