| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene based reflection sheet which has excellent reflection characteristics by itself as a base material, even when no pigment or fine particle to heighten a light scattering property is added thereto. SOLUTION: The polypropylene based reflection sheet is composed of a polypropylene based resin composition including a mixture of a component (a) and a component (b) as a main component, wherein the mass ratio of respective components is (a)/(b)=70/30 to 90/10, and is a sheet perforated by using a compressed gas, and is characterized in that the sheet has≥97% reflectance at 550 nm wavelength. The component (a) is a crystalline polypropylene based resin of which the peak crystal melting temperature is≥150°C, and the component (b) is a copolymer of a vinyl aromatic compound and a conjugate diene, or a hydrogenated derivative thereof. COPYRIGHT: (C)2008,JPO&INPIT
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