| 摘要 |
A method of manufacturing a surface protection film for protecting an exposed surfaces from harsh environments weathering may comprise coating a carrier film with a topcoat layer, extruding a polyurethane layer directly onto an exposed surface of the topcoat layer such that the polyurethane film and the topcoat layer bond together without the need to perform a separate lamination step, and applying an adhesive layer to a surface of the polyurethane layer generally opposite a side bonded to the topcoat layer. According to one embodiment, the polyurethane layer may be extruded directly onto the topcoat layer at a temperature between approximately 250-450° F. the present disclose may eliminate the need to separately laminate the topcoat and the polyurethane, thereby making the process more cost effective.
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