Use of an antimony-free polyester film for the production of foil bags and film tubes with high temperature resistance

摘要

Use of biaxially oriented film comprising 10 ppm antimony, 50-15000 ppm radical scavenger and 90 wt.% polyester, and exhibiting e.g. a turbidity of less than 10%, a tensile strength of greater than 100 N/mm 2>in each film direction, an elongation at break of greater than 50% in each film direction, a yellow value of less than 2.5, a lightness of greater than 85, measured according to the oven test, an elongation at break of greater than 5% in each film direction, measured according to the oven test, and a film thickness of 6-26 mu m, for producing film bags or film tubes. Use of biaxially oriented film comprising 10 ppm antimony, 50-15000 ppm radical scavenger, and 90 wt.% polyester, and exhibiting a turbidity of less than 10%, a tensile strength of greater than 100 N/mm 2>in each film direction, a difference in the tensile strength in the machine direction and width direction of less than 180 N/mm 2>, an elongation at break of greater than 50% in each film direction, an elongation at break of greater than 260% in any film direction, a yellow value of less than 2.5, a lightness of greater than 85, a standard viscosity value of the film of at least 600, measured according to the oven test, an elongation at break of greater than 5% in each film direction, measured according to the oven test, and a film thickness of 6-26 mu m, for producing film bags or film tubes. An independent claim is also included for biaxially oriented polyester film, comprising less than 2 ppm antimony and 50-15000 ppm radical scavengers, and exhibiting turbidity of less than 5%, tensile strength of greater than 100 N/mm 2>in each film direction, a difference in the tensile strength in the machine direction and width direction of less than 180 N/mm 2>, an elongation at break of greater than 50% in each film direction, an elongation at break of greater than 260% in any film direction, a yellow value of less than 2.5, a lightness of greater than 90, a shrinkage in the machine direction and width direction of less than 2.5%, at 150[deg] C, a roughness of 40-110 nm, a film thickness of 6-26 mu m, standard viscosity value of the film of at least 600, measured according to the oven test, an elongation at break of greater than 5% in each film direction, measured according to the oven test, and yellow value of less than 4, measured according to the oven test.