Water-based, heat sealable adhesive for laminating...

B - Operations – Transporting – 32 – B

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B32B 21/08 (2006.01) B32B 7/12 (2006.01)

Patent

CA 2358539

A water-based, heat sealable adhesive for laminating a decorative top layer such as vinyl, paper, or veneer to a substrate formed of a wood or agricultural product such as particleboard, fiberboard, plywood, strawboard and the like. The adhesive includes, as a primary ingredient thereof, a polymer containing one or more monomers which would when polymerized, or copolymerized yields a Shore D harness greater than the Shore D harness of the wood substrate. Monomers of this type include styrene, methyl methacrylate, vinyl acetate, vinyl chloride and diphenylmethane diisocyanate. The adhesive may also contain a coalescing agent, a filler, up to 10% by weight water, and other conditioning additives.

L'invention concerne un adhésif thermoscellable aqueux permettant de stratifier une couche supérieure décorative fabriquée par exemple à base de vinyle, de papier ou de placage, sur un substrat formé à partir d'un article en bois ou d'origine naturelle, par exemple un panneau aggloméré, du carton, du contre-plaqué, ou du carton paille. Cet adhésif renferme, comme ingrédient principal, un polymère qui contient un ou plusieurs monomères qui une fois polymérisés ou copolymérisés, présentent une dureté Shore D supérieure à celle dudit substrat en bois. Les monomères de ce type sont notamment le styrène, le méthacrylate de méthyle, l'acétate de vinyle, le chlorure de vinyle, et le diisocyanate de diphénylméthane. L'adhésif de cette invention peut également renfermer un agent de coalescence, une matière de charge, jusqu'à 10 % d'eau, et d'autres additifs de traitement.

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