POLYESTER FILM

摘要

This invention relates to the polyester film provided to settle out problems like integration phenomenon resulted from the addition of inorganic compounds, especially to keep high transparency and a constant content of the feldspar in the polyester film is inevitable. The film is made by preparing the main repeating unit with ethylene terephthalode to have more than 60 wt% wherein the feldspar which has mean particle diameter of 0.5 to 7 Pm and is surface-treated with 0.05 to 1.5 wt. % of coupling agent, is coated with polyolefin resin and mixed to be 0.05 to 5 wt. % of total polyester.