INNER FILM LAYER FOR LAMINATED GLASS AND LAMINATED GLASS Russian patent published in 2011 - IPC C03C27/12 

FIELD: chemistry.

SUBSTANCE: invention relates to a film layer for laminated glass. The inner film layer for laminated glass contains at least a pair of protective layers (1) and a sound-insulating layer (2) between the pair of protective layers. The film layer has a wedge-like shape in the cross section with wedge angle θ ranging from 0.1 to 0.7 mrad, maximum thickness (4) of 2000 mcm or less and minimum thickness (5) of 400 mcm or more. The minimum thickness of the sound-insulating layer is equal to or greater than 20 mcm.

EFFECT: improved sound insulation properties of laminated glass.

5 cl, 7 ex, 4 tbl, 4 dwg