Simplified process for obtaining polyester yarns at high speed

Details Simplified process for obtaining polyester yarns at high speed Simplified process for obtaining polyester yarns at high speed

1987-08-20

1989-04-04

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

26421114, 2642102, 2642108, 2642905, 2642907, 264130, D01F 662, D01D 5088, D01D 512

Patent

active

048184560

ABSTRACT:
The invention provides a process for simplified spinning of yarns on polyethylene terephthalate, at high speed and with direct take-up on the winder. After leaving the spinning die, the filaments are cooled by a gaseous fluid, simultaneously brought together and oiled at a convergence point situated at a distance L.sub.1 from the die such that L.sub.o .ltoreq.L.sub.1 .ltoreq.(L.sub.o +30)cm, the value of L.sub.o corresponding to the first point at which the derivative of the curve expressing the birefringence of the filaments as a function of the distance (in cm) from the die passes through a maximum, and wound at a speed greater than 4,500 m/min, preferably equal to or greater than 5,000 m/min, the maximum distance between the die and the point of deposition of the yarn on the bobbin being between 100 and 200 cm. The yarns obtained may be used as such or may be textured.

REFERENCES:
patent: 2604667 (1952-07-01), Hebeler
patent: 3996324 (1976-12-01), Landenbager et al.
patent: 4049763 (1977-09-01), Mineo et al.
patent: 4237187 (1980-12-01), Razbon, Jr. et al.

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