| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laminate white film for light reflector which prevents occurrence of crack in the stretching of the film and has practically sufficient reflection performance in a visible light region. <P>SOLUTION: The laminate white film for light reflector comprises a high void layer, a thin supporting layer provided on one surface of the high void layer and a thick supporting layer provided on the other surface of the high void layer. The thin supporting layer and the thick supporting layer are formed from a polyester composition containing 0.1-10 wt.% inert particle, and the high void layer is formed from the polyester composition having 52-60 wt.% void forming material. When total thickness of the thin supporting layer and thick supporting layer is defined as 100%, the thickness of the thin supporting layer is 5-30% and the thickness of the thick supporting layer is 95-70%. The total thickness of the thin supporting layer and the thick supporting layer occupies 5-20% of total thickness of the laminate white film. The thickness of the high void layer occupies 95-80% of total thickness of the laminate white film and the total thickness of the laminate white film is 175-300 μm. <P>COPYRIGHT: (C)2011,JPO&INPIT |
