POLYESTER FILM AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A polyester film and its manufacturing method are provided for the proper use of films for wrapping foods and for adhering the inner face of a metal can, having an excellent lamination processing characteristic and a good shock resistance. CONSTITUTION: The polyester film is comprised of: more than 95 wt % ethyleneterephthalate of repetition unit; a first polyester resin having a limited viscosity of o.55 to 0.75dl/g and a melting temperature of 240 to 260°C; a first layer having a surface roughness under 10nm; a second polyester resin having a melting temperature of 190 to 215°C; a second layer having a surface roughness under 40nm.