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METHOD FOR THE PRODUCTION OF POLYESTER GRANULES LOW IN HYDROLYSIS MADE OF HIGH-VISCOSITY POLYESTER MELTS, AND DEVICE FOR THE PRODUCTION OF THE POLYESTER GRANULES
METHOD FOR THE PRODUCTION OF POLYESTER GRANULES LOW IN HYDROLYSIS MADE OF HIGH-VISCOSITY POLYESTER MELTS, AND DEVICE FOR THE PRODUCTION OF THE POLYESTER GRANULES
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机译:用高粘度聚酯熔体制成的水解较低的方法,以及用于生产聚酯颗粒的装置
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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 polymerization degree of 132 to 165, as well as the granulates formed therefrom. 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.
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