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|1. (WO2017061415) POLYESTER COMPOSITION FOR MASTER BATCHES, POLYESTER COMPOSITION FOR FILMS, AND POLYESTER FILM|
|Applicants:||TOYOBO CO., LTD.
|Title:||POLYESTER COMPOSITION FOR MASTER BATCHES, POLYESTER COMPOSITION FOR FILMS, AND POLYESTER FILM|
The present invention is a polyester composition for master batches, which contains prescribed amounts of: a polyester having a dicarboxylic acid component and a glycol component as constituents; a magnesium compound; an alkali metal compound; a specific phosphorous compound; and a lubricant, and which has a sufficiently low melt resistivity and is excellent in hue and thermal stability. Adding this polyester composition for master batches enables enhancing of electrostatic adhesion to a cooling drum so as to improve film formation properties, and imparting of optimum slippage, thereby providing a polyester film that also has excellent quality.