| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light reflection film which is constituted of a polypropylene film and which has high reflectivity and further can be made thinner by making reflectivity equivalent to or more than that of a conventional white film in order to satisfy demand of miniaturization as a reflection film for a surface light source of a liquid crystal screen for a mobile information instrument. <P>SOLUTION: The light reflection film is constituted of a biaxial orientation polypropylene film (layer A) which is consisting of a composition containing a polypropylene resin with β crystal formation ability of 50 to 100% and inorganic particles of 5 to 20 mass% content and which has voids and in which the number of resin-void interfaces in a thickness direction is 500 to 2,000/100 μm. <P>COPYRIGHT: (C)2008,JPO&INPIT |
