IR-reflektierende Verbundglasscheibe und Verfahren zu ihrer Herstellung

摘要

Heat reflective laminated glazing, especially for automobiles, consists of one or more polymer foils which are sandwiched between glass sheets and which are provided with one or more IR reflective functional layers, especially of metallic silver type, extending at least along the glazing periphery up to its edge. The novelty is that the functional layer is interrupted over at least part of the glazing periphery by a preferably 0.05-1.0 mm wide separation line (16) extending parallel to and preferably spaced by 2-10 (especially 3-5) mm from the glazing edge. Also claimed are processes for producing the above glazing, in which either (a) a separation line (16) is formed in a prefabricated laminate (8), consisting of a coated polymer film (10) and two thermoplastic assembly foils (12, 13), by a moving laser beam passing through one of the assembly foils and then the laminated is assembled with glass sheets (2, 3) to form laminated glazing (1); or (b) a separation line (16) is forme d by a laser beam which passes through one of the glass sheets and an assembly foil of the fabricated laminated glazing (1) and which is focussed on the IR reflective layer (11).