INTERLAYER FOR LAMINATED GLASS AND LAMINATED GLASS

摘要

The present invention has it for its object to provide an interlayer film for laminated glass and a laminated glass which shows a much decreased extent of blushing of the peripheral region thereof even when placed in a high-humidity atmosphere, without compromise in those fundamental performance characteristics which are required of laminated glass, such as transparency, weather resistance, adhesion and penetration resistance. The present invention relates to an interlayer film for laminated glass comprising a plasticized poly(vinyl acetal) resin wherein the sodium salt in said interlayer film has a particle diameter of not greater than 10 mu m and the concentration of sodium is not greater than 50 ppm. Alternatively, the particle diameter of the potassium salt in the interlayer film is not greater than 5 mu m and the concentration of potassium is not greater than 100 ppm.