INTERLAYER FILM FOR LAMINATED GLASS AND LAMINATED GLASS Russian patent published in 2020 - IPC C03C27/12 

FIELD: glass.

SUBSTANCE: invention relates to laminated glass and interlayer film. Interlayer film for laminated glass contains a thermoplastic resin and has a portion in which the thickness increase value increases in the direction from one end to the other end in the region of increasing thickness, has a portion in which the thickness increase value decreases in the direction from one end to the other end in the region of increasing thickness, has a portion in which the wedge angle increases in the direction from one end to the other end in a region with a wedge-shaped cross-section in the thickness direction, or has a part in which the wedge angle decreases in the direction from one end to the other end in a region with a wedge-shaped cross-section in the thickness direction. Average roughness Rz by ten points of surface microrelief in central position of part, in which value of thickness increase increases, part, in which value of thickness increase decreases, part, in which wedge angle increases, or part, in which wedge angle decreases, is 20 mcm or more than.

EFFECT: technical result is reduced probability of presence of residual air bubble between laminated glass element and interlayer film during production of laminated glass.

8 cl, 14 dwg, 1 tbl