Multi-layer sheet having a weatherable surface layer
View Patent ↗A multi-layer sheet and a process for producing the sheet are disclosed. The sheet can comprise a first polymer layer comprising a weatherable film of polyvinyl fluoride (PVF) or polyvinylidene fluoride (PVDF) having an adhesive coating on one side; second pigmented polymer layer extruded onto the adhesive coating of the first polymer layer; and optionally a third extruded thermoformable polymer backing layer. The process can comprise combining a pigmented polymer onto the adhesive coating surface of the weatherable film of PVF or PVDF, passing the resulting structure into a nip of two rolls under pressure and subsequently an optional third thermoformable polymer backing layer is extruded or laminated onto the pigmented polymer layer.
1. A process comprising coating an acrylic polymer onto a polyvinyl fluoride (PVF) cast film or a polyvinylidene fluoride (PVDF) cast film to produce a coated film; extruding a metallocene catalyzed very low density polyethylene (m-VLDPE) polymer layer onto the surface of the coated film to produce a sheet; optionally attaching the PVF film or the PVDF film to a supporting film of a biaxially oriented polyester film to produce a structure; passing the sheet or the structure into a nip of two rolls under pressure; subsequently, optionally extruding or laminating a third polymer layer onto the m-VLDPE polymer layer; wherein the acrylic polymer comprises one or more UV absorbers, UV stabilizers, or mixtures thereof; the m-VLDPE polymer layer contains pigments, flakes, dyes, or flake pigment, and optionally other additives; and the sheet has a distinctness of image of at least 60.
2. The process of claim 1 wherein the m-VLDPE contains 0.5-10% by weight, based on the weight of the m-VLDPE, of flake pigments and the sheet has a distinctness of image of at least 60.
3. The process of claim 2 wherein the cast film is the PVF cast film.
4. The process of claim 2 wherein the cast film is the PDVF cast film.
5. The process of claim 3 further comprising the third polymer layer which is optionally back cladded with the biaxially oriented polyester film.
6. The process of claim 4 further comprising the third polymer layer which is back cladded with the biaxially oriented polyester film.
7. The process of claim 3 wherein the sheet is thermoformed into an auto part, auto panel, truck part or truck panel.
8. The process of claim 4 wherein the sheet is thermoformed into an auto part, auto panel, truck part or truck panel.