DEFECT RESISTING ACOUSTIC POLYMER INTERLAYERS

摘要

This disclosure is related to the field of polymer interlayers for multiple layer glass panels and multiple layer glass panels having at least one polymer interlayer sheet. Specifically, this disclosure is related to the field of polymer interlayers comprising multiple thermoplastic layers which resist the formation of optical defects.

主权项

1. A polymer interlayer comprising:
a first polymer layer comprising at least one polymer selected from the group consisting of poly(vinyl butyral), polyurethane, and poly(ethylene-co-vinyl acetate); a second polymer layer comprising at least one polymer selected from the group consisting of poly(vinyl butyral), polyurethane, and poly(ethylene-co-vinyl acetate); wherein said second polymer layer is in contact with said first polymer layer; and a third polymer layer comprising at least one polymer selected from the group consisting of poly(vinyl butyral), polyurethane, and poly(ethylene-co-vinyl acetate); wherein said third polymer layer is in contact with said second polymer layer; and wherein said second polymer layer is disposed between said first polymer layer and said third polymer layer, thereby resulting in a polymer interlayer comprising two skin layers and a core layer; and wherein each of said skin layers has a flow of about 0.19 mm to about 0.37 mm as measured by DF135.