METHOD FOR MANUFACTURING A POLYESTER YARN

摘要

The present invention relates to a polyester yarn usable in an air bag fabric, and more specifically, to a method for manufacturing a polyester yarn, an air bag yarn manufactured therefrom, and an air bag fabric including the same, wherein the method comprises the steps of: mixing a specific dicarboxylic acid composition and glycol in a predetermined range, and performing an ester reaction; performing a polycondensation reaction for an oligomer created by said ester reaction; performing solid state polymerization for a polymer created by said polycondensation reaction; and performing melt spinning for a polyester chip created by said solid state polymerization, and performing stretching. The polyester yarn manufactured by the present invention has low modulus, high strength, and further, high contraction. In addition, the polyester yarn of the present invention obtains an excellent mechanical property with remarkably low stiffness, thereby providing a superior storage effect, shape stabilization, and an air blocking effect when used for an air bag fabric.