Method of making an improved pre-adherized polyester filament ya

Details Method of making an improved pre-adherized polyester filament ya Method of making an improved pre-adherized polyester filament ya

1996-08-01

1997-12-02

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

2642107, 2642108, 26421112, 26421114, 26421117, D01D 512, D01F 662, D06M 13325, D06M 1555

Patent

active

056932758

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 et al.
patent: 5352483 (1994-10-01), Humbrecht et al.
patent: 5403661 (1995-04-01), Humbrecht et al.

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