Method of manufacturing yarn for high strength tire cord with polyethyleneterephthalate, method of manufacturing tire cord thereof and high strength polyethyleneterephthalate tire cord manufactured by the same method

摘要

polyethylene terephthalate tire cord yarn strength and the strength is reduced if the stand is not strong utilization shrinkage and excellent the present invention to provide a method of manufacturing a tire cord, as increasing both the spinning draft and stretch ratio, the spinning draft is more than 1,000, and 2,800 ~ 3,500 m / minute producing a non-drawn filament spinning speed of the take-up end and the non-drawn filament multi-stage drawing to a draw ratio of 1.5 to 2.0, a rate to 5,800 ~ 7,000 m / minute producing a polyethylene terephthalate yarn, and CS to the polyethylene terephthalate yarn made of the raw cord, and the raw cord was immersed in dried diethylene pingaek and to provide a manufacturing method of dipping-treated high-strength polyethylene terephthalate tire cord to thermal treatment. The tire cord is strong and not more than 24.5 Kgf intermediate elongation is less than 3.6% and is characterized by form stability index is less than 5.8%. ;