The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 2018
Filed:
Jan. 13, 2015
Hyosung Corporation, Seoul, KR;
Si-Hwan Joo, Sejong, KR;
Hong-Un Kim, Guri-si, KR;
Jin-Kyeong Park, Youngin-si, KR;
Su-Yeon Hwang, Incheon, KR;
Cheol Kim, Geumcheon-gu, KR;
HYOSUNG CORPORATION, Seoul, KR;
Abstract
A polyester tire cord having improved dimensional stability and methods of manufacturing the polyester tire cord are provided. The method includes forming a discharge yarn, extruded while a polyester containing 85 mol % or more of ethylene terephthalate units is melted and passes through a nozzle; forming an undrawn yarn by spinning the discharged yarn; manufacturing a yarn by multistep drawing the undrawn yarn; plying the yarn by twisting; and dipping the plied yard in a dipping solution, and then drying, drawing, and heat-setting the plied yarn before dipping the plied yarn in resorcinol-formaldehyde latex and again drying an heat-setting the plied yarn. An intermediate elongation of the formed polyester tire cord after vulcanization for 20 minutes at 170° C. is E, an intermediate elongation of the polyester tire cord before vulcanization is E, and a difference between Eand Eis ΔE. ΔE divided by Eis 0.5 or less.