초록 ▼

The use is described of rigid foam cores in panels, especially doors, of the kind comprising a foam core (22) between two molded skins (8,10). The weather-resistance, especially the resistance to thermally-induced bowing, of such panels is improved by forming the panel of at least one vacuum-formed

The use is described of rigid foam cores in panels, especially doors, of the kind comprising a foam core (22) between two molded skins (8,10). The weather-resistance, especially the resistance to thermally-induced bowing, of such panels is improved by forming the panel of at least one vacuum-formed thermoplastics skin (8,10) adhesively bonded to a substantially open-cell, rigid foam core (22). If the foam has frangible cell walls, it can be conformed to accommodate the depressed zones of a molded overlying door skin (8,10) by crumbling under compression, with fracture of the cell walls to accommodate the zones. A preferred open-cell rigid foam is a phenolic foam reinforced with finely divided particulate filler.

대표청구항

1. A panel comprising a substantially open-cell, rigid foam core and at least one vacuum formed thermoplastic skin adhesively bonded to said foam core, the panel is in the form of a door.

1. A panel comprising a substantially open-cell, rigid foam core and at least one vacuum formed thermoplastic skin adhesively bonded to said foam core, the panel is in the form of a door.