Tire core made from an improved polyester filament yarn

Details Tire core made from an improved polyester filament yarn Tire core made from an improved polyester filament yarn

1996-03-01

1996-11-19

Edwards, Newton

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428364, 428357, 52902, 152451, D02G 300

Patent

active

055761054

ABSTRACT:
The method of making a pre-adherized polyester filament yarn with adhesion properties for rubber includes applying a pre-adherizing agent to a polyester filament yarn having a boiling water shrinkage value of <20% while spinning it at not less than 3200 m/min, heat treating the pre-adherized polyester filament yarn with hot air on a bobbin for several days at from 50.degree. to 90.degree. C., and then subjecting the conditioned POY to a single drawing step in which the take-off speed is 1.7 to 2.2 times faster than the inlet speed. Impregnated tire cord made from the polyester filament yarn so treated has a tensile strength of 60 to 70 cN/tex and a tempered shrinkage test value at 190.degree. C. of less than 3.5%, an adhesive power of 18 to 25 daN to rubber, an appearance grade of 2.5-4.0 and a dimensional stability value of greater than 24,000 cN/tex.sup.2.

REFERENCES:
patent: 3526607 (1970-09-01), Brown et al.
patent: 4121901 (1978-10-01), Bourrain et al.
patent: 5045260 (1991-09-01), Humbrecht

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