Process for the manufacture of tire monofilaments

Details Process for the manufacture of tire monofilaments Process for the manufacture of tire monofilaments

1974-06-28

1976-12-21

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264235, 264290T, D01D 512

Patent

active

039989208

ABSTRACT:
Polyester monofilaments having very high strength and low elongation also at elevated temperature and being resistant against tire rubber are obtained from polyesters having an intrinsic viscosity of more than 0.67 and terminal carboxy groups of less than 25 milliequivalents/kg by spinning into a water bath, a first drawing in a water bath having a temperature of from 70.degree. to 100.degree. C in a ratio of from 1 : 4.0 to 1 : 6.0, a second drawing at a temperature being a maximum 15.degree. C below the melting point to attain a total drawing ratio of from 1 : 6.0 to 1 : 7.5, and subsequent setting at a temperature being a maximum 15.degree. C below the melting point without allowing a shrinkage.

REFERENCES:
patent: 2615784 (1952-10-01), McClellan
patent: 2768057 (1956-10-01), Friederich
patent: 3216187 (1965-11-01), Chantry et al.
patent: 3361859 (1968-01-01), Cenzato
patent: 3413797 (1968-12-01), Chapman

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