Method for coating uneven substrates with thin coating...

B - Operations – Transporting – 32 – B

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B32B 21/00 (2006.01) B29C 63/02 (2006.01) C09J 7/00 (2006.01) B29C 63/48 (2006.01)

Patent

CA 2485269

The invention relates to a method for coating uneven substrates, particularly timber product surfaces, with thin coating materials to form an even and uniformly smooth surface, whereby the support and the coating constituents are pressed against a smooth metal sheet, laminating rolls, structured strips or the like, and relates to layer supports comprised of a supporting material and of a coating material. The aim of the invention is to also be able to reliably and economically smooth materials that have uneven surfaces. To this end, a top layer film and an adhesive system serve as the coating material, whereby the adhesive system, during coating, gives the top layer film properties that fill and span flaws in the material to be coated by means of chemical/physical reactions. In a corresponding layer support, the coating materials comprise an adhesive system and a top layer film, whereby the adhesive system contains fillers that, during coating, fill and span flaws of the material to be coated by means of chemical/physical reactions.

L'invention concerne un procédé pour recouvrir des supports non plans, notamment des surfaces constituées de matériaux dérivés du bois, avec des matériaux de revêtement de faible épaisseur afin de former une surface plane et lisse. Selon l'invention, le support et les composants de revêtement sont plaqués contre une tôle lisse, des rouleaux de contrecollage, des bandes structurées ou similaires. L'invention concerne également des supports ainsi revêtus, constitués d'un matériau support et d'un matériau de revêtement. L'objectif de l'invention est de permettre de lisser, de manière fiable et économique, même des matériaux présentant des surfaces irrégulières. A cet effet, on utilise comme matériau de revêtement un film servant de couche de recouvrement et un système de colle qui, lors de l'application, confère à ce dernier des propriétés de colmatage et de recouvrement des défauts du matériau à recouvrir, sous l'effet de réactions chimico-physiques. Dans un support ainsi revêtu, les matériaux de revêtement présentent un système de colle et un film servant de couche de recouvrement. Ledit système de colle contient des charges qui, lors de l'application, colmatent et recouvrent les défauts du matériau à recouvrir, sous l'effet de réactions chimico-physiques.

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