Interlayers for laminated safety glass with superior de-airing and laminating properties and process for making the same
AssigneeE.I. du Pont de Nemours and Company
InventorCharles Anthony Smith
Life of this patent
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Abstract
This invention relates to thermoplastic interlayer sheets or films for laminated safety glass with superior vacuum de-airing at elevated temperatures and superior tacking and edge sealing properties. The sheeting has an embossed surface pattern on at least one of the surfaces, which provides relatively uninterrupted channels for de-airing in at least two non-parallel directions, wherein the channels are spaced about 0.1 to about 1 mm apart and have a depth of less than about 25 μm and a width of about 30 to about 300 μm.
Claims22
A thermoplastic interlayer sheet or film comprising an unplasticized polymer selected from the group consisting of ethylene acid copolymers and ionomers derived therefrom having at least one embossed surface having a surface pattern that provides relatively uninterrupted channels for de-airing in at least two non-parallel directions that are spaced about 0.1 to about 1 mm apart and have a depth of about 2 to less than 20 μm and a width of about 30 to about 300 μm.
Dependencies are inferred from the claim text.