Method of producing polyester sheet, polyester film and method of producing polyester film

摘要

The present invention provides a method for producing a polyester sheet, including melt-extruding a polyester having a half-value width of a crystallization temperature on cooling of 25°C to 50°C; and cooling the melt-extruded polyester such that a surface temperature of the polyester is lowered at a rate of 350°C/min to 590°C/min, wherein the polyester sheet has a thickness of 3mm to 5mm.