Patent ID: 11433650

Abstract:
Provided is an interlayer film for laminated glass with which double images in laminated glass can be significantly suppressed. An interlayer film for laminated glass according to the present invention has one end, and the other end having a larger thickness than the one end, the interlayer film has a region for display corresponding to a display region of a head-up display, and when first partial wedge angles θ1 are calculated in respective first partial regions of 80 mm in the direction connecting the one end and the other end centered at respective selected points, second partial wedge angles θ2 are calculated in respective second partial regions of 40 mm in the direction connecting the one end and the other end centered at respective selected points, and |θ1−θ2| is calculated from θ1 and θ2 in the first partial region and the second partial region centered at the same point in the direction connecting the one end and the other end, a maximum value among all values of |θ1−θ2| is 0.2 mrad or less, and the interlayer film as a whole has a wedge angle of 0.1 mrad or more.