| abstract |
The present invention relates to a biodegradable polyester composition in which the cyclic esterification product having the structure represented by formula (I) has a weight content of 100 ppm to 950 ppm and tetrahydrofuran has a weight content of 3 ppm to 200 ppm. A degradable polyester composition is disclosed. The present invention adds the cyclic esterification product and tetrahydrofuran to the composition, and controls the content of the cyclic esterification product and tetrahydrofuran in the composition within a predetermined range, thereby improving the heat oxidative aging resistance of the biodegradable polyester composition. Much improved and blow-molded films or injection-molded products are boiled at 40 ° C. for 240 h with 95% ethanol, have few surface deposits, have a good surface appearance, and are biodegradable. It significantly improves printing defects in the printing process of the polyester composition and imparts excellent printing performance to the film. |