Patterned silicone coating

摘要

A method of applying a patterned coating of a silicone adhesive to a substrate sheet, comprising the steps of pattern coating a silicone precursor composition onto the substrate, followed by thermally curing the precursor composition coated on the substrate. The precursor composition is a viscous fluid, and the pattern coating is performed by suitably modified block printing, intaglio printing or screen printing methods. Also provided are coated substrates obtainable by the methods of the invention, and wound dressings comprising such coated substrates.

主权项

1. A method of applying a patterned coating of a silicone adhesive to a substrate sheet, comprising the steps of pattern coating a silicone precursor composition onto at least a portion of the substrate sheet, followed by thermally curing the precursor composition coated on the portion of the substrate sheet, wherein the step of pattern coating comprises the steps of coating the silicone precursor composition onto an apertured support layer to provide a coated apertured support layer, followed by applying the coated apertured support layer to the substrate sheet, followed by thermally curing the silicone precursor composition, followed by removing the coated apertured support layer to leave a patterned layer of the cured silicone composition on the substrate sheet, whereby the pattern of the cured silicone on the substrate sheet substantially corresponds to a pattern of coating on the apertured support layer.