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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, AND POLYESTER GRANULES LOW IN HYDROLYSIS
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, AND POLYESTER GRANULES LOW IN HYDROLYSIS
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机译:高粘度聚酯熔融制得的水解度低的聚酯颗粒的制备方法,以及水解程度低的聚酯颗粒的生产装置
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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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