Method for the production of polyester granulates from highly viscous polyester melts and also device for the production of the polyester granulates
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United States of America Patent
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May 24, 2016
Grant Date -
May 23, 2013
app pub date -
Dec 28, 2012
filing date -
Aug 24, 2007
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Abstract
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 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.
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