METHOD AND DEVICE FOR THE PRODUCTION OF POLYAMIDE 6 PELLETS
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United States of America Patent
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Issued Date -
Apr 25, 2024
app pub date -
Feb 15, 2021
filing date -
Feb 15, 2021
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Abstract
A method and a device for the production of polyamide 6 pellets wherein an intermediate drying is not necessary and a combined pelletizing and extraction take place. Depending on the intended use, the pellets may directly be used or subjected to further treatment steps. A device for the production of polyamide 6 pellets includes a melt device for providing a melt of polyamide 6, an underwater pelletizing system which is operable under increased pressure, and a vertical vessel having a cylindrical section and a tapered bottom section. The tapered bottom section is provided with a cooling device and is connected to a pipe comprising a screw and/or a rotary gate valve for conveying pellets. The device includes a circuit for circulating an aqueous solution of ε caprolactam through the underwater pelletizing system and the vertical vessel.
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