| 摘要 |
<p>The inventive process forms a thermoformable preform by pressure laminating a layer of cloth fabric to one face of the thermoplastic substrate, preferably as the substrate is extruded and while still hot from the extrusion process. This fabric/thermoplastic laminated preform can be easily processed in a matched mold press. The fabric should be of a non-stretch type. This non-stretch characteristic, together with its intimate bonding to the thermoplastic substrate, prevents the substrate from thinning in the corner regions. Indeed, because the intimately bonded fabric drags or pulls the substrate from a number of directions as the corner regions are formed, the thermoplastic substrate accumulates and actually thickens in the corner regions, leading to a shell which is remarkably durable and aesthetically pleasing.</p> |
