Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1977-02-22
1978-02-07
Phynes, Lucille M.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 75T, 264176F, C08G 6370
Patent
active
040726630
ABSTRACT:
In the production of polyester fibers in a melt-spinning process, the transfer system between the melt source and the spinning position has a special importance due to the thermal degradation of the polyester. The present invention provides an improved transfer process which ensures relatively low thermal degradation of the molten polymer. The process is characterized by employment of two or more indexes whereby transfer elements and polymer flows in the transfer system may be correlated for minimum degradation of the polymer. The invention is of particular importance in a continuous process involving continuous polyester polycondensation coupled with continuous melt-spinning.
REFERENCES:
patent: 3000053 (1961-09-01), Hart
patent: 3480706 (1969-11-01), Carpenter et al.
patent: 3553171 (1971-01-01), Ocker
patent: 3644294 (1972-02-01), Siclari et al.
patent: 3758658 (1973-09-01), Riggert
patent: 3822334 (1974-07-01), Patterson
Allied Chemical Corporation
Kelly Fred L.
Phynes Lucille M.
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