| 摘要 |
PROBLEM TO BE SOLVED: To obtain the above sheet capable of uniformly applying a silicone oil, maintaining a transparency, reducing a blocking property between the oriented sheets each other, also good in peeling property of piled formed materials by biaxially stretching a resin composition consisting of a polystyrene resin and a styrene-based cross-linked fine particles having a refractive index resembling thereto. SOLUTION: This biaxially oriented polystyrene-based resin sheet is obtained by stretching a resin composition containing (A) 60-600ppm styrene graft diene rubber having 0.1-3μm mean particle diameter based on a rubber concentration, (B) 100-1000ppm styrene-based cross-linked diene particles having 1-10μm mean particle diameter and (C) 100-30000ppm inorganic filler having 0.001-0.5μm mean particle diameter in a transparent polystyrene resin. Further, it is preferable that the component (C) is at least one kind selected from calcium carbonate, barium sulfate and zinc oxide. |
