Laminated glazings
AssigneePilkington plc
InventorsPhilip Harold Corkhill, Malcolm Francis Green, Neil Winstanley, Paul Arthur Holmes
Life of this patent
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Abstract
An intrusion resistant laminated glazing, suitable for automotive use, comprises an impact resistant ply of rigid thermoplastic polyurethane sensitive to ultra-violet radiation and, outside said ply, an ultra-violet absorbing or reflecting ply. The ultra-violet absorbing ply may be of thermoplastic polyurethane interlayer material which serves to bond the rigid thermoplastic polyurethane ply to outer glass plies. By using interlayer materials of low modulus to bond the rigid thermoplastic ply to outer glass plies, a product with good impact resistance and intrusion resistance is achieved.
Claims20
A laminated glazing comprising an impact resistant ply of rigid thermoplastic polyurethane sensitive to ultra-violet radiation and having a tensile modulus greater than 500 MPa, bonded to an outer glass ply by a low modulus interlayer having a tensile modulus of less than 100 MPa, and bonded on the opposing face to a second outer glass ply by a second low modulus interlayer having a tensile modulus of less than 100 MPa, wherein a ply or plies other than the rigid thermoplastic polyurethane ply absorbs or reflects ultra-violet radiation.
Dependencies are inferred from the claim text.