| 摘要 |
PROBLEM TO BE SOLVED: To provide a half mirror film for on-vehicle picture display mirror that has excellent surface quality and low chroma, and attains both of excellent mirror image visibility and picture visibility.SOLUTION: A half mirror film for on-vehicle picture display mirror satisfies all of (1) to (5) described below: (1) a lamination layer film includes a layer (thereafter referred to as an A layer) composed of a resin A in a range from 10 nm to 400 nm in thickness, and a layer (thereafter referred to as a B layer) composed of a resin B having a property different from the resin constituting the A layer in the range from 10 nm to 400 nm in thickness, and has 250 or more layers in total alternately laminated in a thickness direction, in which at least three or more thick film layers each having a thickness equal to or more than 1 μm and equal to or less than 20 μm are included, and the thick film layers are located on most outer surface layers on both sides and located at a change point of a monotone increase curve and/or monotone reduction curve of a layer thickness in a layer configuration composed of the A layer and B layer, that is, an intermediate layer; (2) the mirror face reflectance is equal to or more than 40% and equal to or less than 60%, and a sum of the mirror face reflectance and the total light ray transmittance is equal to or more than 90%; (3) the chroma in a range of 100 cm×100 cm of a film surface is equal to or more than 0 and equal to or less than 7; (4) there is no unevenness with an average height equal to or more than ±5 nm on the film surface, and a major axis equal to or more than 50 mm; and (5) the strain rate of the mirror face is equal to or less than 2.0%.SELECTED DRAWING: None |
