Composite coating of variable thickness having a gradient coloration in the cross-web direction
AssigneeE. I. Du Pont de Nemours and Company
InventorsDebra C. Francis, Siva V. Vallabhaneni, Bert C. Wong
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Abstract
Composite coatings are provided having a variable thickness and a gradient coloration in the cross-web direction using a premetered extrusion coating process wherein a pigmented coating composition and a non-pigmented coating composition are simultaneously extruded onto a carrier film. The composite coatings are useful in preparing laminated structures such as automobile windshields with a colored gradient band.
Claims11
A process for preparing a composite coating of variable thickness and a gradient coloration in the cross-web direction comprising depositing onto a carrier film,
- (a) a layer of polymeric binder resin solution having a uniform thickness across the width of the film and a layer of colored polymeric binder resin of variable thickness in the cross-web direction and having a gradient coloration in the cross-web direction when measured either from the center or the edge of the web, said variable thickness tapering from a minimum to a maximum from each edge to the center of said film or from a maximum to a minimum from each edge to the center of said film, and
- (b) drying the coatings to provide a dry composite coating,
- (c) said individual layers having a maximum dried coating thickness of about 100 microns.
A carrier film having a composite coating thereon comprised of a layer of polymeric binder resin having a uniform thickness and a colored polymeric binder resin layer having a variable thickness and a gradient coloration in the cross-web direction when measured either from the center or an edge of the web, said variable thickness tapering from a minimum to a maximum from each edge to the center of said web, said individual layers having a maximum dried coating thickness of about 100 microns.
Dependencies are inferred from the claim text.