Interlayer film for laminated glass, method for producing same, and laminated glass using same

Abstract

Provided is an interlayer film for laminated glass comprising: a layer x which contains polyvinyl acetal (A1) having a content of vinyl alcohol units of 22 mol % or less, a plasticizer (B), heat ray shielding microparticles (C), phosphoric acid ester (D), and alkali metal salt and/or alkali earth metal salt (F), and has an acid number in accordance with JIS K2501 of 1.5 KOH mg/g or less; and a layer y containing polyvinyl acetal (A2) having a content of vinyl alcohol units of from 25 to 34 mol %, the plasticizer (B), and an ultraviolet absorber (E), wherein the layers y are located on both sides of the layer x. This enables to provide an interlayer film for laminated glass that is excellent in transparency, adhesion, durability, sound insulation, and a heat ray shielding property.

Dependencies are inferred from the claim text.