Process for coating extruded thermoplastic substrates and...

B - Operations – Transporting – 32 – B

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B32B 3/00 (2006.01) B32B 9/00 (2006.01)

Patent

CA 2581040

This invention relates to a process for forming a PVC article having a weatherable coating by the in-line spray, roll-coat, brush-coat, gravure print, flexographic print, thermal transfer coat or inkjet application of a polymeric solution onto extruded PVC as it is being extruded. The invention also relates to rigid PVC articles coated by the process. A polyvinylidene fluoride coating can be applied to PVC to form an article having improved gloss, good weatherability, good color retention and stain resistance.

La présente invention se rapporte à un procédé permettant de former un article en PVC doté d'un revêtement résistant aux intempéries, qui consiste à appliquer une solution polymère sur un PVC extrudé au fil de son extrusion, par pulvérisation en ligne, par couchage par rouleaux, par revêtement à la brosse, par héliogravure, par flexographie, ou par impression à thermotransfert ou à jet d'encre. L'invention a également trait à des articles en PVC rigides revêtus à l'aide dudit procédé. Un revêtement de fluorure de polyvinylidène peut être appliqué sur le PVC pour que l'on obtienne un article présentant un brillant amélioré, une bonne résistance aux intempéries, une stabilité de couleur et une résistance aux taches satisfaisantes.

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