| abstract |
The present invention discloses a biodegradable polyester composition, wherein based on a total weight of the biodegradable polyester composition, a weight content of tetrahydrofuran is 3ppm-200ppm; and based on the total weight of the biodegradable polyester composition, a weight content of cyclopentanone is 0.5ppm-85ppm. In the present invention, by adding tetrahydrofuran and cyclopentanone into the composition and controlling the content of tetrahydrofuran and the content of cyclopentanone in a certain range in the composition, poor printing of the biodegradable polyester composition during the printing process can be hugely improved, neither the ink stripping off the film material, nor excessive ink adhering to the film material, so that the film shows excellent printing performance. Moreover, a lubrication degree of a film of biodegradable polyester during a blow molding process can be improved. When a velocity of film blowing is 176 Kg/h, a range of a film thickness is less than 0.2µm and a relative deviation of the film thickness is less than 1%. Bubble stability and continuity of film blowing are guaranteed. |