The invention provides an interlayer film for a laminated glass and a laminated glass,
which are protected against a slump in TL value through attenuation of said
coincidence effect and adapted to display an outstanding sound insulation performance
over a broad temperature range.
An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin,
which is a blend of a polyacetal resin having an average polymerization degree
of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree
of 3,000 to 5,000, and
which has an acetalization degree of 60 to 85 mol % and an acetyl group content
of 8 to 30 mol %.
An interlayer film for a laminated glass
which shows a temperature dependence of loss tangent
in which the lowest-temperature side maximum of loss tangent appears at 30
C. or lower when examined for dynamic viscoelasticity.
