INTERLAYER FILM FOR LAMINATED GLASS AND LAMINATED GLASS

摘要

An intermediate film for laminated glass and laminated glass having excellent sound insulation properties and particularly suitably used for a head-up display etc. where the driver can view both a forward field and instrument display at the same time without dropping their line of vision. The intermediate film for laminated glass is constructed from at least a pair of protective layers and a sound insulation layer sandwiched between the pair of protective layers. The intermediate film has a wedge shape cross-section, a cross-section wedge angle .theta. of 0.1 - 0.7 mrad, a maximum thickness of not more than 2000 µm, and a minimum thickness of not less than 400 µm. The minimum thickness of the sound insulation layer is not less than 20 µm.