INTERLAYER FILM FOR MULTILAYER GLASS, METHOD OF PRODUCING INTERLAYER FILM FOR MULTILAYER GLASS AND MULTILAYER GLASS Russian patent published in 2020 - IPC C03C27/12 B32B17/10 B29C48/00 

FIELD: laminated products or materials.

SUBSTANCE: invention relates to interlayer film for multilayer glass, as well as method of producing interlayer film for multilayer glass and multilayer glass produced using interlayer film for multilayer glass. Interlayer film for multilayer glass, obtained by extrusion head die embossing method, using extrusion stream rupture, has a layer structure comprising two or more layers of resin, and has a large number of protrusions and recesses on at least one surface, wherein the maximum height Ry (mcm) and the average interval Sm (mcm) between the projections and recesses, measured in accordance with JIS B 0601 (1994) on the surface with protrusions and recesses, satisfies formula (1): (Ry·Sm)/2 ≤ 3,500 (1).

EFFECT: reduced frequency of optical distortion of multilayer glass.

6 cl, 6 dwg, 2 tbl