| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a multilayer film which is colorless and transparent, reflects only the P polarization component of incident light such that it is visually recognized at a specified visual field angle, does not reflect the S polarization component such that it is not visually recognized to be seen colorless and transparent, and indicates the selective reflexivity of light depending on a visual field angle and polarization. <P>SOLUTION: In the multilayer film, first layers 0.05-0.5μm in thickness made of a crystalline thermoplastic resin having negative specific birefringence properties and second layers 0.05-0.5μm in thickness made of a thermoplastic resin, are laminated alternately to form at least 100 layers. In a biaxially oriented multilayer film, the height of a reflectance peak in relation to incident light from a plane vertical to the surface of the film is 5% or below, the height of a reflectance peak in relation to the S polarization of light incident at 60°to the film is 5% or below, and the height of a reflectance peak in relation to the P polarization of light incident at 60°to the film is at least 20%. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
