| 摘要 |
<p>A biaxially oriented multi-layer laminated film which is prepared by laminating a first layer and a second layer alternately so as to have eleven or more layers and subjecting the resultant laminate to biaxial orientation, characterized in that each layer has a thickness of 0.05 to 0.5 μm, the first layer comprises a crystalline thermoplastic resin, the second layer comprises a crystalline thermoplastic resin having a composition different from that of the first layer, and it exhibits a maximum light reflectance in the wave length range of 350 to 2000 nm which is higher by 20 % or more than that of a base line obtained from the light reflectance curve in the same wave length range. The above laminated film exhibits characteristic optical properties due to optical interference which are same as those of a conventional multi-layer film prepared through laminating a plurality of layers having different refractive indices alternately, and also is free from the problems of low adhesion between layers and low tear strength, which have been associated with such a conventional layer.</p> |
