Method for making a colored multilayer composite, and colored multilayer composite produced by the method
AssigneeTrespa International B.V.
InventorsLaurens Petrus Vogels, Wilhelmus Josephus Alex Van De Wall
Life of this patent
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Abstract
The method for making a multilayer composite having one or more colors brings together a number of acrylic layers, which are partially cured in a first step and completely cured in a second step. The curing takes place with actinic radiation, such as accelerated electrons, UV radiation or X-ray radiation, the curing unit operating with different dosage rates during the two steps. The curable acrylic layers are applied to the respective supporting layers by screen printing or stencil printing, or else may be applied to the supporting layers by casting or with the aid of printing rollers.
Claims18
A method for forming a colored multilayer composite by applying at least two (or more) radiation-curable layers to flexible supporting layers made of film web or paper web and laminating the supporting layers to each other, whereby the radiation-curable layers contain color pigments, comprising the following steps:
- bringing together the two flexible supporting layers with the radiation-curable layers facing toward one another;
- pressing together the two flexible supporting layers with exposure to heat to form the colored multilayer composite;
- partially curing the radiation-curable layers within the multilayer composite in a first step applying not more than 30% of the maximum dose of actinic radiation required for complete curing of the radiation-curable layers;
- removing one of the supporting layers from the colored multilayer composite;
- and
- completely curing the radiation-curable layers in a second step using a dose of from 30% to 100% of the actinic radiation for full curing.
Dependencies are inferred from the claim text.