UV irradiation apparatus with an additional monochromatic radiation source

Patent metadata

Field	Value
Publication number	US-9994952-B2
Application number	US-201414785602-A
Country	US
Kind code	B2
Filing date	Apr 14, 2014
Priority date	Apr 18, 2013
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A component, the surface of which is at least partially covered with a coating, wherein the coating comprises a PVD coating arranged between a first paint layer and a second paint layer and the first paint layer forms a base coat layer on the surface and the second paint layer forms a top coat layer having a top coat thickness on the PVD coating, wherein at least the top coat layer was produced with UV-curable paint. Proceeding from the interface of the PVD coating in a region smaller than the top coat thickness, the top coat layer has a lower degree of cross-linking induced by UV light than in the part of the top coat layer connected to said region. The invention relates in particular to a method for producing such a component.

First claim

The invention claimed is:

1. A component having a surface at least partially covered by a coating, wherein the coating comprises:
a PVD coating arranged between a first paint layer and a second paint layer, and the first paint layer forms a basecoat layer on the surface, and the second paint layer forms a topcoat layer with a topcoat thickness on the PVD coating, wherein at least the topcoat layer is made using a UV-curable paint, and wherein, proceeding from an interface of the PVD coating, in a region smaller than a topcoat thickness, the region has a smaller degree of cross-linking induced by UV light than in a part of the topcoat layer adjacent to this region.

2. The component according to claim 1 , wherein the degree of cross-linking of the topcoat layer is highest at an interface to the environment.

3. The component accosting to claim 2 , wherein the basecoat layer is also made of a UV-curable paint.

4. The component according to claim 3 , wherein the PVD coating comprises at least two layers and is made of a plurality of PVD layers.

5. A method of manufacturing a component having a metallic finish, comprising the steps of:
providing a plastic substrate having a surface to be coated;
painting the surface with a basecoat layer;
applying a PVD coating on the surface painted with the basecoat layer;
painting the PVD coating with a UV-curable topcoat layer;
applying UV light to the topcoat layer, wherein at first a mercury-vapor lamp and subsequently a narrow-band, monochromatic UV radiation source is used as a radiation source, resulting in the component having a coating wherein, proceeding from an interface of the PVD coating, in a region smaller than a topcoat thickness, the region has a smaller degree of cross-linking induced by the UV light than in a part of the topcoat layer adjacent to this region.

6. The method according to claim 5 , comprising filtering the light of the mercury-vapor lamp using a cold light mirror before the light impinges on the topcoat layer.

Assignees

• Oerlikon Surface Solutions Ag Truebbach
• Oerlikon Surface Solutions Ag Pfaeffikon

Inventors

• Schaefer Ruediger
• Kaspar Martin

Classifications

• B05D2490/50

  compositions varying with a gradient perpendicular to the surface · CPC title

• B05D7/53

  Base coat plus clear coat type · CPC title

• B05D3/0209

  Multistage baking · CPC title

• B05D3/06 Primary

  by exposure to radiation (B05D3/02 takes precedence {; plasma treatment B05D3/141}) · CPC title

• B05D7/57

  the last layer being a clear coat · CPC title