Method for the Production of Polyester Granulates From Highly Viscous Polyester Melts and Also Device for the Production of the Polyester Granulates

摘要

The invention relates to a method and device for the direct production of polyester granulate from a highly viscous polyester melt with a polymerisation degree of 132 to 165, as well as the granulates formed thereform. In the method, the highly viscous polyester melt is subjected to a pre-drying and drying/degassing after a hot cutting method. Hot cutting is implemented at water temperatures of 70° C. to 95° C. and with a liquid to solid ratio of 8 to 12:1.

主权项

1. Method for the direct production of polyester granulate from a highly viscous polyester melt (hiV) with a polymerisation degree (PG) of 132 to 165, in which the hiV melt is subjected to a pre-drying and drying/degassing after a hot cutting method, characterised in that the cutting phase in the hot cutting method is effected at water temperatures of 70 to 95° C. and a liquid to solid ratio of 8 to 12:1 is maintained.