Method for producing a directly printed panel
AssigneeLignum Technologies AG
InventorDieter Doehring
Life of this patent
Estimating the term…
Abstract
The present invention relates to a panel as well as a method for producing a panel, in particular a wall- ceiling- or floor panel. The method according to the invention provides that a layer of liquid radiation curing acrylate with a low Martens hardness is applied on a support layer in a first step. This is followed by an application of an intermediate layer in a second step and thereafter the application of a further layer wet-on-wet, which as a Martens hardness after curing which is larger than the Martens hardness of the first applied layer. The resulting panel has an intermediate layer with an inhomogeneous hardness profile due to the wet-on-wet application which leads to particularly advantageous properties.
Claims29
A method for producing a panel, in particular a wall, ceilingor floor panel, comprising the following steps in the indicated order:
- (a) providing a support plate having a front side;
- (a1) applying a primer layer on the front side of the support plate and printing with a printing ink a decorative layer on the primer layer;
- (b) applying a layer of liquid radiation-curing acrylate on the decorative layer, which has a Martens hardness MS1 0.5 to 120 N/mm2 after curing;
- (c) at least partially curing of the applied layer of liquid radiation-curing acrylate by radiation in step (b);
- (d) repeating the steps (b) and (c) until a first elastic layer S1 with a thickness of 10 to 600 μm is available;
- (e) applying an intermediate layer of liquid radiation-curing acrylate on the at least partially cured layer;
- (f) applying a second layer S2 of liquid radiation-curing acrylate by means of a film on the previously applied uncured intermediate layer, so that a partial mixing of the layers takes place, wherein
- the second layer is an acrylate, which comprises a Martens hardness MS2 after curing, wherein MS2>MS1;
- (g) curing together of at least the applied layers of steps (e) and (f) by means of radiation;
- and
- wherein a third elastic layer S3 having a thickness of 30 to 150 μm is provided between the front side of the support plate and the decorative layer, which third elastic layer after curing has a Martens hardness Ms3 with MS3≤MS1;
- and
- wherein, after curing, the hardness of the elastic layer S1 is essentially constant over the entire thickness and the hardness differences within the layer is less than 20 N/mm2.
A panel, in particular a wall, ceiling, or floor panel, comprising:
- a support plate with a front side and a back side, and
- a layer system at least on the front side of the support plate, wherein the layer system starting from the front side comprises:
- a first elastic layer S1 of an aliphatic polymer, which has a thickness from 40 to 600 μm and a Martens hardness MS1 of 0.5 to 120 N/mm2;
- a second layer made of a polymer, which has a thickness of 10 to 180 μm and a Martens hardness MS2, wherein
- MS2 is >MS1;
- an intermediate area between the first elastic layer and the second layer, the intermediate area having a Martens hardness MZB, wherein
- MS2 is >MZB≥MS1;
- and wherein the first elastic layer S1 is at least partially cured by UV radiation before the intermediate area ZB and the second layer S2 are formed on the first elastic layer S1, and
- a decorative layer between the front side of the support plate and the first elastic layer, the decorative layer consisting of printing ink,
- wherein a third elastic layer S3 is provided between the front side and the decorative layer, which has a Martens hardness MS3 with MS3≤MS1;
- wherein the third elastic layer S3 has a thickness of 30 to 150 μm;
- and
- wherein the hardness of the first elastic layer S1 is essentially constant over the entire thickness and the hardness differences within the layer is less than 20 N/mm2.
Dependencies are inferred from the claim text.