LOW DISTORTION INTERLAYER

摘要

The present invention is in the field of multiple layer glass panels comprising a polymer sheet having desirable surface properties, and more specifically, the present invention is in the field of multiple layer glass panels comprising poly(vinyl butyral) having a finished surface of relatively low waviness and high roughness disposed in contact with poly(ethylene terephthalate) and/or other poly(vinyl butyral) type layers.

主权项

1. A method of producing a multiple layer interlayer, comprising the steps of:
forming a first polymer sheet comprising poly(vinyl butyral) and a plasticizer, wherein said first polymer sheet has a first surface and a second surface and wherein said first surface has a waviness index of less than 20,000 square micrometers, an Rz value of at least 20 micrometers, and a permanence of between 10 and 95; disposing a layer of polymer film in contact with said first surface of said first polymer sheet to form a stack; and, laminating said stack.