| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-layer laminated stretched film which reflects a light of arbitrary wavelength band selectively and widely. SOLUTION: A multi-layer laminated stretched film is composed of at least eleven layers. The layers are laminated in turn by two kinds of layers of which thicknesses are 0.05-0.3μm. One kind of layer (layer A) is made of a polyethylene-2,6-naphthalate, and another kind of layer (layer B) is made of a thermoplastic resin of which refractive index is smaller than that of the polyethylene-2,6-naphthalate constituting the layer A. At least one of the layer A and the layer B is different in thickness each by each, and a value being divided a thickness of a most thick layer by that of a most thin layer is equal to or larger than 1.3. The layer A and the layer B are stretched in at least one direction as being laminated.
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