Method for the spinning and winding of polyester filaments,...

D - Textiles – Paper – 01 – F

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D01F 6/62 (2006.01) D01F 6/92 (2006.01)

Patent

CA 2405495

The invention relates to a method for the production and winding of pre- oriented polyester filaments, comprising at least 90 wt. %, based on the total weight of polyester filament, polybutylene terephthalate (PBT) and/or polytrimethylene terephthalate (PTMT), preferably PTMT, characterised in that a) the spinning draft is set in the range 70 to 500, b) directly after exiting the spinning nozzle, the filaments run through a cooling delay zone of 30 mm to 200 mm in length, c) the filaments are cooled to below the solidification temperature, d) the filaments are bundled at a separation of between 500 mm and 2500 mm from the bottom face of the nozzle, e) the thread tension, before and between the drawing galettes is set to between 0.05 cN/dtex and 0.20 cN/dtex, f) the threads are wound with a thread tension of between 0.025 cN/dtex and 0.15 cN/dtex and g) the winding speed is set to between 2200 m/min and 3500 m/min.

La présente invention concerne un procédé pour produire et enrouler des filaments polyester préorientés, constitués d'au moins 90 % en poids de polybutylène téréphthalate (PBT) et/ou de polytriméthylène téréphthalate (PTMT), de préférence de PTMT, par rapport au poids total du filament polyester. Ce procédé est caractérisé en ce que a) l'étirage de filature est réglé entre 70 et 500, b) les filaments parcourent, directement après leur sortie de la filière, une zone de temporisation de refroidissement d'une longueur de 30 à 20 mm, c) les filaments sont refroidis à la température de solidification, d) les filaments sont empaquetés à une distance comprise entre 500 mm et 2 500 mm du côté inférieur de la filière, e) la tension de fil devant et entre les galettes est réglée entre 0,05 cN/dtex et 0,20 cN/dtex, f) le fil est enroulé à une tension de fil comprise entre 0,025 cN/dtex et 0,15 cN/dtex et g) la vitesse d'enroulage est réglée entre 2 200 m/min et 3 500 m/min.

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