Patent ID: 6890551
Filing Date: 2005-05-10
Classification: A61F

Abstract:
1. Process for producing the improved elastic light occlusive eye patch having an upper side and a lower side which is provided on the lower side with a skin compatible self-adhesive layer, consisting essentially of a top layer, an inner layer and a black colored interlayer, all layers being made of a foamed material, wherein the foamed material comprises aqueous aliphatic dispersions of polyesterurethanes, wherein the process for producing the improved elastic light occlusive eye patch comprises the following process steps: a) preparing the top foam layer, the inner foam layer and a foamed interlayer, for each foam layer, a mixture of aqueous aliphatic dispersions of polyesterurethanes is combined with a foaming agent and a dye; b) foaming the respective mixture to the desired degree by blowing air into it; c) coating the foam for the top layer onto a release paper, with subsequent drying; d) coating out the foam for the interlayer onto the dried top layer, with subsequent drying; and e) coating out the inner layer on the top layer or interlayer, with subsequent drying, to provide an assembly of foam layers having a thickness of 2 mm or less.