| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropyrene light reflection film which has high light reflectance, has little unevenness of light reflection, hardly causes yellowing accompanying the elapsed time, is light in weight and can be used for a backlight of liquid crystal panel or the like. SOLUTION: The polypropyrene light reflection film consists of a resin composition (A) made by compounding dicyclo-pentadiene petroleum resin of softening point (ring and ball method) 160 to 200°C, 4 to 56 wt.% and inorganic filler powder 4 to 56 wt.% so that the total of the dicyclo-pentadiene petroleum resin and the inorganic filler powder amounts to 10 to 60 wt.%, with respect to crystalline polypropyrene resin referred to the composition (A), and contains voids. The void-containing polypropyrene light reflection film is obtained by stretching a film consisting of the resin composition (A) with areal magnification of four times or more at least in the uniaxial direction. COPYRIGHT: (C)2006,JPO&NCIPI
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