MULTILAYERED GLASS AND SANDWICH FILM FOR MULTILAYERED GLASS Russian patent published in 2009 - IPC B60J1/00 

FIELD: machine building.

SUBSTANCE: present invention pertains to multilayered glass, where at least a sandwich film and a glass sheet are present in form of a layer structure and are combined into a single entity. The values of the head injury criterion, measured in accordance with regulations of the European Enhanced Vehicle-safety Committee EEVC/WG 17, are equal to 1000 or less. The sandwich film for the multilayered glass is characterised by dynamic modulus of elasticity in tests for linear dynamic viscous elasticity, measured at frequencies, varied at 20°C in the range from 5.0x10¹ to 1.0x10² Hz, equal to 3x10⁷ Pa or less. The sandwich film for multilayered glass contains cross-linked resin based on polyvinyl acetal, characterised by the degree of acetalation ranging from 60 to 85% (molar), and contains a plasticiser for sandwich films in quantity of 40 weight parts or more per 100 weight parts of the above mentioned polyvinyl acetal based resin.

EFFECT: obtaining high operating characteristics with regards to weakening impact, obtained from outside, or during collision of the head with the glass, as a result of an accident, when using the multilayered glass on vehicles.

4 cl, 15 dwg, 5 tbl, 24 ex