Laminated glazing with improved resistance to relatively punctual types of impact

摘要

Laminated glazing with improved resistance to relatively punctual types of impact. The invention concerns a laminated glazing comprising a structural transparent substrate (1) bonded to a glass sheet (2) of 0.5 to 4 mm, intended to constitute an outer surface of the laminated glazing, by means of an intermediate adhesive layer (3 ) from 4 to 10 mm, which successively comprises 0.25 to 2.5 mm of a first flexible polymer material (4a) having a relaxation modulus at most equal to 2 GPa for relaxation times at least equal to 10 min , at temperatures at least equal to -40 ° C, in contact with the glass sheet (2), then a second stiff polymer material (5) having a relaxation modulus at least equal to 4 GPa, for time constants at most equal to 0.1 milliseconds and temperatures at most equal to 40 ° C. its application as glazing for an aerial, land or water vehicle, or for buildings. Figure for the abstract: Fig. 1