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METHOD FOR PREPARING POLYETHER FILAMENT YARN, AND POLYESTER FILAMENT YARN PREPARED THEREFROM, AND POLYESTER TIRE CORD THE COMPRISING THE SAME
METHOD FOR PREPARING POLYETHER FILAMENT YARN, AND POLYESTER FILAMENT YARN PREPARED THEREFROM, AND POLYESTER TIRE CORD THE COMPRISING THE SAME
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机译:制备涤纶长丝的方法,以及制备涤纶长丝的方法,以及包含该涤纶长丝的涤纶线
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摘要
A manufacturing method of a polyester multifilament yarn, the polyester multifilament yarn produced thereby, and polyester tire cord including the same are provided to supply the polyester tire cord having high modulus and a low shrinkage rate. A manufacturing method of a polyester multifilament yarn for industrial use comprises the following steps of: producing a released yarn by melting and spinning a polyester chip having inherent viscosity of 0.85 ~ 1.3 and an ethyleneterephthalate unit of 90 mole % at least at temperature of 290 °C or less; manufacturing a polyester partially oriented yarn by cooling and solidifying the released yarn; and drawing the polyester partially oriented yarn having a drawing ratio of 2.5 times or less comparing to the total drawing ratio.
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