Selectively embossed surface coverings and processes of...

B - Operations – Transporting – 44 – C

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Details

B44C 1/20 (2006.01) B29C 59/04 (2006.01) B29C 59/16 (2006.01) B41M 1/24 (2006.01) B44C 1/24 (2006.01) B44F 7/00 (2006.01) B44F 11/00 (2006.01) B29C 35/08 (2006.01)

Patent

CA 2473028

Selectivity embossed surface coverings are prepared by mechanically embossing a wear layer which overlays at least one printing ink containing a photoinitiator which has been printed in a pattern or design. The embossed wear layer is subjected to ultraviolet radiation which causes curing of the wear layer in the surface areas disposed over the printing ink. The product then is fused whereby the mechanical embossing in surface areas which are not disposed over the printing ink relaxes and becomes smooth. In a variant of the invention, a thermoplastic wear layer is employed which can be mechanically embossed in the surface areas which are not disposed over the printing ink with a texture different from the first applied mechanical embossing. In another variant, two different spectral regions of UV curing radiation are used so that a urethane coating can be employed as a top coat with a selectively embossed surface.

L'invention concerne des revêtements de surface à gaufrage sélectif. On prépare ces revêtements par gaufrage mécanique d'une couche d'usure recouvrant au moins une encre d'impression contenant un photo-initiateur, imprimée de manière à former un motif ou un dessin. La couche d'usure gaufrée est exposée à une rayonnement ultraviolet qui provoque le durcissement de la couche d'usure dans les zones de surface situées au dessus de l'encre d'impression. Le produit est ensuite fondu, ce qui entraîne le relâchement des zones de surface qui ne sont pas situées au dessus de l'encre d'impression, ces zones devenant lisses. Dans un mode de mise en oeuvre différent, on utilise une couche d'usure thermoplastique qui peut être gaufrée mécaniquement dans les zones de surface qui ne sont pas placées au dessus de l'encre d'impression, de manière à leur donner une structure différente du premier gaufrage mécanique. Dans un mode de mise en oeuvre encore différent, on utilise deux régions spectrales différentes de rayonnement UV, de manière à permettre l'utilisation d'un revêtement uréthanne en tant que couche de surface présentant une surface gaufrée sélectivement.

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