Process for melt spinning aromatic polyester

Details Process for melt spinning aromatic polyester Process for melt spinning aromatic polyester

1987-07-13

1989-10-03

Lorin, Hubert

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264349, D01D 110, D01F 662

Patent

active

048715018

ABSTRACT:
Aromatic polyester fibers having high strength and high modulus of elasticity can be obtained stably for a long period of time by melt spinning by using a screw type extruder having a screw which has a compression ratio of 2.5 to 4.0 and thereby inhibiting entrapment in the resultant molten polyester of gases present in or on prowders, granules or pellets being melted, and by back pressure of the molten polyester sending gas generated by decomposition of the molten polyester to a back portion of the extruder, and then extruding and melt spinning the molten polyester at a temperature of 280.degree. C. to 420.degree. C.

REFERENCES:
patent: Re23948 (1955-02-01), Filler
patent: 3068514 (1962-12-01), Street
patent: 3596320 (1971-08-01), Manning et al.
patent: 4183895 (1980-01-01), Luise
patent: 4280802 (1981-07-01), Lang et al.
patent: 4325903 (1982-04-01), Wissbrun et al.

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