MULTILAYER SURFACING FILM
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United States of America Patent
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Issued Date -
Apr 13, 2023
app pub date -
Oct 13, 2022
filing date -
Oct 13, 2021
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Abstract
Provided is a multilayer film that includes a top layer and a barrier layer. The top layer includes a polyurethane network and having an exposed major surface. The barrier layer includes a fluoropolymer and having opposed first and second major surfaces, where the first major surface is modified by a surface treatment and wherein the top layer is disposed on the first major surface. When bonding to a curable substrate, the barrier layer can prevent migration of low molecular weight species from the curable substrate into the polyurethane network, thereby avoiding discoloration resulting from exposure of these species to ultraviolet light and other weathering factors.
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