Patent ID: 7883761

Claim:
A polymer interlayer comprising: a first polymer layer comprising a plasticized thermoplastic polymer; a second polymer layer comprising a plasticized thermoplastic polymer; and, a third polymer layer comprising a plasticized thermoplastic polymer; wherein said second polymer layer is disposed between said first polymer layer and said third polymer layer; wherein said first polymer layer has a tensile break stress that is at least 15 kilograms per square centimeter greater than the tensile break stress of said second polymer layer; wherein said third polymer layer has a tensile break stress that is at least 15 kilograms per square centimeter greater than the tensile break stress of said second polymer layer; wherein the surface of said first polymer layer opposite said second polymer layer has an embossed Rz value of 50 to 90 microns; and, wherein said first polymer layer has a thickness 0.05 to 0.71 millimeters.