Polyester fibers for rubber reinforcement and dipped cords...

Details Polyester fibers for rubber reinforcement and dipped cords... Polyester fibers for rubber reinforcement and dipped cords...

2005-02-08

2005-02-08

Dye, Rena (Department: 1774)

Stock material or miscellaneous articles

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

Rod, strand, filament or fiber

C428S359000, C428S364000, C428S373000, C428S395000, C264S210300, C264S210700, C264S210800

Reexamination Certificate

active

06852411

ABSTRACT:
A polyester fiber containing polyethylene terephthalate at 90 mol % or higher of a whole repeating unit in a molecular chain thereof, the fiber having an intrinsic viscosity (IV) of 0.85 dl/g or higher and simultaneously meeting the following characteristics: (a) strength≧6.0 cN/dtex; (b) strength×(breaking elongation)0.5≦26.0 cN/dtex. %0.5;(c) monofilament linear density≦5.0 dtex; and (d) main dispersion peak temperature of loss tangent (tan δ) in the measurement of dynamic viscoelasticity at 110 Hz≦147.0° C., and a polyester dipped cord, which is obtainable by twisting one or more than one base yarn together into a pretwisted yarn, where the base yarn is made of a polyester fiber twisting two or more pretwisted yarns together into a greige cord; and subjecting the greige cord to dip treatment to give a dipped cord simultaneously meeting the following characteristics: (a) tenacity conversion efficiency in the dip treatment (dipped cord tenacity/greige cord tenacity)≧96%; and (b) elongation at a specific load+dry heat shrinkage≦7.5%.

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