Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Reexamination Certificate
2005-11-22
2005-11-22
Edwards, N. (Department: 1774)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
C428S395000
Reexamination Certificate
active
06967058
ABSTRACT:
Disclosed is a method of producing a polyethylene terephthalate-based polyester fiber, including spinning polyethylene terephthalate based polyester to produce an undrawn yarn with an intrinsic viscosity of 0.83 or more and a density of 1.338 g/cm3or more, multi-stage drawing the undrawn yarn, heat-setting the drawn yarn, relaxing the heat-set yarn, and winding the relaxed yarn to produce the resulting drawn yarn with an intrinsic viscosity of 0.83 or more and a density of 1.38 to 1.3865 g/cm3. Compared to a prior polyester yarn with high modulus and low shrinkage, produced according to conventional melt-spinning and drawing processes, an industrial polyester yarn with high modulus and low shrinkage according to the present invention contributes to significantly improving strength retention (tenacity of a dip cord/tenacity of a grey yarn) of the dip cord, produced by treating the polyester yarn of the present invention with an adhesive (RFL) and subsequently heat-treating the RFL-treated polyester yarn. Therefore, the polyester multifilament yarn according to the present invention is useful as a tire cord.
REFERENCES:
patent: 4751143 (1988-06-01), Gibbon et al.
patent: 4867936 (1989-09-01), Buyalos et al.
patent: 5518813 (1996-05-01), Leumer
patent: 5891567 (1999-04-01), Kim et al.
patent: 6511624 (2003-01-01), Cho et al.
patent: 6511747 (2003-01-01), Cho et al.
patent: 6641756 (2003-11-01), Lee et al.
Cho Eun-lai
Park Chan
Park Chan-min
Edwards N.
Hyosung Corporation
Striker Michael J.
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