UNDRAWN POLYETHYLENE TEREPHTHALATE (PET) FIBER, DRAWN PET FIBER, AND TIRE-CORD COMPRISING THE SAME

摘要

The present invention relates to an undrawn PET fiber and a drawn PET fiber those can provide a cap ply cord and the like showing more improved modulus and good dimensional stability, and a tire cord including the same. The undrawn PET fiber may be a fiber of which the crystallinity is 25 % or more, the birefringence index is 0.085 to 0.11, the amorphous orientation factor (AOF) is 0.15 or less, and the melting temperature (Tm) is 258 C0 or more.