摘要
Cross-over method is established to predict necking point for PET high- speed fiber spinning. Even slowly crystallizing polymers such as PET can crystallize on the spinline at sufficiently high spinning speed. The development of rtmning velocity, temperature, crystallinity and theological force is investigated for the take-up velocity over a range of 6 000 - 10 000 m/min. The position of necking point, temperature rise and abrupt increase of crystallinity move closer to the spinneret with the increase of take-up velocity,
Cross-over method is established to predict necking point for PET high-speed fiber spuming. Even slowly crystallizing polymers such as PET can crystallize on the spinline at sufficiently high spinning speed. The devel-opment of running velocity, temperature, crystallinity and rheological force is investigated for the take-up velocity over a range of 6 000 -10 000 m/min. The pos-ition of necking point, temperature rise and abrupt increase of crystallinity move closer to the spinneret with the increase of take-up velocity.
基金
Sponsored by Fok Ying Tung Education Foundation
