MULTILAYERED POLYESTER SHEET

摘要

PURPOSE: To provide polyester sheets, a large number of which can be stack-cut. CONSTITUTION: The sheet is produced by forming surface layer made of resin composition by mixing 3-20wt.% of polycarbonate-based or polystyrene-based resin, the glass transition temperature of which is not lower than (Tg0 -10) deg.C and the refractive index of which lies within the range of nD0±0.015 by the thickness of not less than 5μm respectively on both the surfaces of transparent ethylene terephthalate-based polyester resin substrate layer having the glass temperature of Tg0 ( deg.C) and the refractive index of nD0 so as to obtain multilayered polyester sheet having the static frictional coefficient of not more than 0.7. Even when a large number of the above-mentioned sheets are stack-cut, no transparency of the sheet is impaired and neither fusion nor burr develops at the edge face of the sheet.