Method for the Application of a Structured Coating Upon a Smooth Surface
First Claim
1. A roll coating method for preparing a coated substrate with structured surface of the coating comprising application of a polymer based coating fluid to a substrate surface by means of a coating fluid application roll and then curing the applied coating, wherein the polymer based coating fluid is a fluid showing Bingham or Herschel-Bulkley flow behavior with a yield stress τ
-
0>
10 dyn cm−
2.
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Accused Products
Abstract
A roll coating method for preparing a coated substrate with structured surface of the coating is described. Said method comprises application of a polymer based coating fluid to a substrate surface by means of a coating fluid application roll and then curing the applied coating, wherein the polymer based coating fluid is a fluid showing Bingham or Herschel-Bulkley flow behavior with a yield stress τ0>10 dyn cm−2, in particular a fluid having low viscosity at high shear rate, fast viscosity enhancement in the absence of shear stress and a high yield stress. Applications of such produced surfaces are release films, e.g. for pressure sensitive adhesives, controlled release adhesives and self-cleaning surfaces and friction coefficient reducing surfaces.
28 Citations
26 Claims
- 1. A roll coating method for preparing a coated substrate with structured surface of the coating comprising application of a polymer based coating fluid to a substrate surface by means of a coating fluid application roll and then curing the applied coating, wherein the polymer based coating fluid is a fluid showing Bingham or Herschel-Bulkley flow behavior with a yield stress τ
-
5. The method of claim wherein the viscosity behavior of the coating fluid comprises a relatively low viscosity of <
- 10 Pa s at high shear rates of >
50 rad sec−
1.
- 10 Pa s at high shear rates of >
- 9. A polymer based coating fluid, said coating fluid comprising rheology modifiers that are highly agglomerated particles.
Specification