Method for the Application of a Structured Coating Upon a Smooth Surface
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United States of America Patent
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Issued Date -
Sep 25, 2008
app pub date -
Sep 12, 2005
filing date -
Sep 12, 2005
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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 .tau..sub.0>10 dyn cm.sup.-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.
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