Building panel

Abstract

A building panel has a deep drawn transparent film having an inner face and a structure having solar cells on the inner face of the deep-drawn film. The structure has an inner face turned away from the film and an outer face on or closely juxtaposed with the inner face of the film. A reinforcement layer constituted as a mass of foamed granular particles is spread over the inner face of the structure in direct contact with the inner face of the structure without the interposition of an adhesive and is heat cured to the film.

1 . A building panel comprising:
 a deep drawn transparent film having an inner face;   a structure having solar cells on the inner face of the deep-drawn film, the structure having an inner face turned away from the film and an outer face on or closely juxtaposed with the inner face of the film; and   a reinforcement layer constituted as a mass of foamed granular particles spread over the inner face of the structure in direct contact with the inner face of the structure without the interposition of an adhesive and heat cured to the film.   
     
     
         2 . The panel according to  claim 1 , wherein the film consists of polycarbonate or PMMA. 
     
     
         3 . The panel according to  claim 1 , further comprising:
 a glue layer between the outer face of the structure and the inner face of the deep drawn film.   
     
     
         4 . The panel according to  claim 1 , further comprising:
 a liquid barrier layer casting compound of polyurethane spread over the inner face of the structure or over the inner face of the film, the mass of foamed granular particles being spread over the liquid barrier layer.   
     
     
         5 . The panel according to  claim 1 , further comprising:
 an in-mold-paint casting compound spread over the inner face of the structure or over the inner face of the film, the mass of foamed granular particles spread over the casting compound.   
     
     
         6 . The panel according to  claim 6 , further comprising:
 a liquid barrier layer casting compound of polyurethane spread over an inner face of the structure or over an inner face of the film.   
     
     
         7 . The panel according to  claim 1 , further comprising:
 electrical lines connected to the structure.   
     
     
         8 . The panel according to  claim 7 , wherein at least a section of the lines passes through the reinforcement layer. 
     
     
         9 . The panel according to  claim 11 , wherein the reinforcement layer has a passage for the electrical lines. 
     
     
         10 . The panel according to  claim 1 , wherein the panel is usable as an exterior panel for cars, commercial vehicles, trailers, or agricultural machines, or as a roof element, a side wall element, an engine hood, a trunk lid, a fender or a trim part for a vehicle. 
     
     
         11 . The panel according to  claim 1 , wherein the panel is usable as an exterior panel for vehicles such as cars, commercial vehicles, trailers, agricultural machines, or the like, and a roof element, a side wall element, an engine hood, a trunk lid, a fender or a trim part for this vehicle. 
     
     
         12 . The panel according to  claim 1 , wherein the panel is usable as a vehicle exterior body part. 
     
     
         13 . A building panel made by the steps of:
 a) providing a deep-drawable film of a transparent plastic;   b) deep-drawing the film;   c) mounting a structure having solar cells on an inner face of the deep-drawn film with an inner face of the structure turned away from the film and an outer face of the structure on or closely juxtaposed with the inner face of the film;   d) placing the deep-drawn film with the mounted structure in a cavity of a mold having at least two mold halves;   e) introducing foamable granular particles into the cavity of the mold and spreading the granular particles over the inner face of the structure in direct contact with the inner face of the structure without the interposition of an adhesive;   f) heating the mold and thereby conductively heating and foaming the granular particles in the cavity into a foam mass;   g) curing the foam mass with the mold closed to form a reinforced panel; and   h) removing the reinforced panel from the mold.