| 摘要 |
PURPOSE: To provide polyester film with improved mechanical and physical properties and to improve a processing method of the polyester film. CONSTITUTION: Disclosed are semi crystalline polyester oriented films having the properties of .MD F5>=18 d a N/mm<2> ,-TD F5>=10 da N/mm<2> ,-MDE >=800 da N/mm2.TDE>=400 d a N/mm2,-MDE+TDE>=1200 d a N/mm<2> ,-MDS105 <=1.5%,-MDS150<=5. 2%,-TD St/TD F5<=2.2. Also disclosed is an improved process for preparing semi crystalline polyester oriented films. |
