Method for the thermal treatment of polyester pellets

Details Method for the thermal treatment of polyester pellets Method for the thermal treatment of polyester pellets

C - Chemistry, Metallurgy

08

J

C08J 3/12 (2006.01) B29B 9/06 (2006.01) B29B 9/16 (2006.01) C08G 63/88 (2006.01)

Patent

CA 2515692

The invention relates to a method for the thermal treatment of PET pellets, in order to achieve a partial crystallisation, whereby the polyester melt is supplied to an underwater granulator and granulated, the granulate produced thus is introduced into a water/solid separator and the dried granulate is introduced into a conveyor device, with a granulate temperature of above 100~ C, which the granulate leaves with a temperature above 100~ C. The invention further relates to a device for carrying out said method.

L'invention concerne un procédé de traitement thermique de granulés de PET visant à obtenir une cristallisation partielle. Selon ledit procédé, la masse fondue de polyester est acheminée à un granulateur immergé et transformée en granulés ; les granulés obtenus sont amenés à un dispositif de séparation eau/solide et les granulés séchés sont amenés à un dispositif de mise en mouvement à une température de granulés supérieure à 100 ·C, dispositif duquel ces granulés sont évacués à une température supérieure à 100 ·C. Cette invention concerne également un dispositif permettant la mise en oeuvre dudit procédé.

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