Abstract: A multilayered safety glass laminate comprising a plurality of alternate plies of glass and thermoplastic transparent interlayers of plasticized polyvinyl butyral resin arranged to provide an impact striking section, a transition section and an impact absorption section. The plasticizer content of the resin in the impact striking section is relatively low to impair projectile penetration and that of the plasticized polyvinyl butyral in the transition section and, if present, in the impact absorption section, relatively high to reduce the severity of spall.

Abstract: Disclosed are laminated windshields, preferably having an outer protective sheet of glass or plastic, at least two relatively thin structural sheet members of polycarbonate resin and interlayers of elastomeric resin interposed between and adhering said sheet and sheet members together. The thickness and material composition of the structural sheet members and interlayers are selectively correlated so that they function as an efficient energy absorber over a wide range of temperatures, such that forces emanating from a predesigned or preestablished impact on the outer sheet member are dissipated without penetration of the windshields.