Patent ID: 6074732
Filing Date: 2000-06-13
Classification: B32B,Y10T

Abstract:
A laminated window comprising a glass sheet, and an intermediate film bonded to said glass sheet, wherein said film has a loss factor tan .delta. greater than 0.6 and a shear modulus G' smaller than 2.times.10.sup.7 N/cm.sup.2 in a temperature range between 10 and 60.degree. C. and in a frequency range between 50 and 10,000 Hz,wherein said intermediate film is associated with at least one film of normal acoustic performance, andwherein said intermediate film is a thermoplastic acrylic polymer film 0.05 to 1.0 mm thick, and wherein this film is joined to a glass sheet with interposition of a polyester film 0.01 to 0.1 mm thick, and a thermoplastic cement film 0.3 to 0.8 mm thick.