Process for preparing structural, heat-insulating shaped bodies,

Details Process for preparing structural, heat-insulating shaped bodies, Process for preparing structural, heat-insulating shaped bodies,

1991-11-21

1993-06-15

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264515, 264516, 15624414, 156245, 156285, B29C 4904, B29C 4920

Patent

active

052195139

ABSTRACT:
A process for preparing structural, heat-insulating shaped bodies which does not necessarily require the use of a foamed heat-insulating material obtained by the use of blowing agents belonging to the class of chlorofluorocarbons. The process includes inserting a heat-insulating pre-molded core inside a tubular element made from an extruded thermoplastic polymer; placing the extruded tubular element containing the pre-molded core into a blow-molding mold; and molding the tubular element into a shell by blow-molding. By subsequent mold closure, the shell adheres to the pre-molded core. An alternative process is disclosed for adhering the tubular element and pre-formed core by closing the mold and drawing a vacuum within the tubular element.

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