Process for high stress spinning of polyester industrial yarn

Details Process for high stress spinning of polyester industrial yarn Process for high stress spinning of polyester industrial yarn

1992-07-31

1993-11-30

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642108, 26421114, 425464, D01D 402, D01D 512, D01F 662, D02J 122

Patent

active

052662551

ABSTRACT:
A process for high stress spinning of polyethylene terephthalate yarns to produce a yarn of improved mechanical properties is disclosed. The process of the invention is conducted by spinning polyethylene terephthalate polymer through a spinneret having a plurality of rows of orifices wherein at least one row of orifices is larger than adjacent row of orifices. The yarn is quenched by contacting filaments issuing from the larger orifice with a quench medium prior to contacting of the yarn issuing from the orifices of smaller size. Thereafter, the yarn is drawn at a draw ratio which is at least about 85% of the maximum draw ratio of the yarn. A yarn having improved strength and/or a reduced fray levels is produced.

REFERENCES:
patent: 4101525 (1978-07-01), Davis et al.
patent: 4195052 (1980-03-01), Davis et al.
patent: 4248581 (1981-02-01), Harrison
patent: 4414169 (1983-11-01), McClary
patent: 4514350 (1985-04-01), Roth et al.
patent: 4605364 (1986-08-01), Roth et al.

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