VERTICALLY ADJUSTABLE SIDE GLAZING FOR MOTOR VEHICLES

摘要

A vertically adjustable composite motor vehicle side glazing, particularly a door window glazing, is made from composite glass including two 1.5 to 3.5 mm thick thermally tempered individual glazings with a thermoplastic intermediate layer. Each individual glazing has in the marginal area tensile stresses in the core, which in the case of a glazing thickness of 2 mm amount to 54 to 76 MN/m2 and for a glazing thickness of 3 mm amount to 46.7 to 71.2 MN/m2. In the central zone within the marginal area the individual glazings have tensile stresses in the core, which in the case of a glazing thickness of 2 mm amount to 38 to 67 MN/m2, while for a glazing thickness of 3 mm amount to 33 to 60 MN/m2. Such composite glazings have high strength in the marginal area and a low strength in the central zone. Therefore they have excellent characteristics both from the static standpoint and from that of accident safety.