Patent ID: 10350858

Abstract:
The present invention aims to provide an interlayer film for laminated glass having small optical distortion while having a multilayer structure of two or more layers, and a laminated glass including the interlayer film for laminated glass. The present invention relates to an interlayer film for laminated glass including at least two resin layers laminated together, the interlayer film having a large number of minute recesses and a large number of minute projections on at least one surface, the at least two resin layers including a first surface layer and a second surface layer and each containing a thermoplastic resin and a plasticizer, wherein, provided that the interlayer film is allowed to stand at 23° C. and a humidity of 30% RH for three hours, and cut with a microtome at 23° C. and a humidity of 30% RH in the horizontal direction of the interlayer film at a portion of 80 to 90 μm distant on the first surface layer side from the interface between the first surface layer and a resin layer contacting the interior side of the first surface layer and then at a portion of 50 μm distant from the cut face on the second surface layer side to prepare a resin film 1 having a thickness of 50 μm, the resin film 1 after standing at a temperature of 23° C. and a humidity of 30% RH for three hours has a surface roughness (Rz) measured by a method in conformity with JIS B-0601 (1994) of less than 2.5 μm.