Process for producing aromatic polyester fiber

Details Process for producing aromatic polyester fiber Process for producing aromatic polyester fiber

1989-01-31

1989-09-12

Lorin, Hubert

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating with particulate material

26421117, 264234, 264345, 427180, 4273722, D01D 1002

Patent

active

048657905

ABSTRACT:
In a process for producing an aromatic polyester fiber by heat-treating a fiber obtained by melt-spinning an aromatic polyester exhibiting anisotropy in its molten state, an aromatic polyester fiber having high strength and high modulus of elasticity can be produced with suppressed fusion between single filaments during the heat treatment by (a) subjecting the fiber obtained by melt spinning to heat treatment in an organic liquid heating medium or (b) adhering to the fiber obtained by melt spinning at least one member selected from the group consisting of suspensions having a concentration of 0.05 to 20% by weight of organic polymer powders having a melting point or a softening temperature higher than the heat treatment temperature, and suspensions having a concentration of 0.1 to 20% by weight of barium sulfate powder or barium titanate powder, and then subjecting the resulting fiber to heat treatment.

REFERENCES:
patent: 2318679 (1943-05-01), Dreyfus
patent: 3366721 (1968-01-01), Burdge et al.
patent: 3770861 (1973-11-01), Hirano et al.
patent: 3778410 (1973-12-01), Kuhfuss et al.
patent: 3803284 (1974-04-01), Burghardt et al.
patent: 4058581 (1977-11-01), Park
patent: 4525384 (1985-06-01), Aoki et al.

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