Patent ID: 9102123
Filing Date: 2015-08-11
Classification: B32B,Y10T

Abstract:
1. A laminated glazing comprising an inner ply of glass and an outer ply of glass and having an acoustic polyvinyl butyral (PVB) interlayer laminated there between, the interlayer being a trilayer construction of PVB layers including one layer constructed to possess acoustic damping properties that impart sound absorption characteristics to the laminated glazing, the trilayer construction of PVB layers including an inner PVB layer positioned between two outer PVB layers, the inner PVB layer possessing said acoustic damping properties, and at least one of the PVB layers of the trilayer construction is body tinted and another of the PVB layers of the trilayer construction trilayer is not body tinted, and when the interlayer, in a thickness of 0.76 mm, is laminated between two plies of glass, each 2.1 mm thick and having a visible light transmission (LT) greater than 88% (CIE Illuminant A), the resultant glazing has: an LT (CIE Illuminant A) of less than 40%; a transmitted energy (TE) (ISO9050:E(2003), air mass 1.5) of less than 45%; and an acoustic transmission loss of greater than 40 db in the range 3000 to 4000 Hz at 21° C.