POLYETHYLENE TEREPHTHALATE FIBER FOR AIR-BAGS AND TEXTILES MADE FROM SAME

摘要

A polyethylene terephthalate multifilament prepared by spinning polyethylene terephthalate chips having an intrinsic viscosity of 0.8 to 1.3 is provided. In order to improve the energy absorption capability of a textile for polyethylene terephthalate air bags, a textile for air bag having an improved rupture property at a welt portion in an air bag cushion deployment test can be prepared using a polyethylene terephthalate fiber by adjusting a strength/deformation curve of the polyethylene terephthalate fiber. Here, the polyethylene terephthalate fiber has a strength/deformation curve in which the polyethylene terephthalate fiber extends by less than 4% when subjected to an initial stress of 1.0 g/d at room temperature, extends by less than 12% subjected to a medium stress of 4.5 g/d and extends by 3% or more until fibers are cut at a tensile strength of at least 7.0 g/d, and has an elongation at break of 15% or more, a carboxyl end group (CEG) content of 35 mmol/kg or less, and a single fiber thickness of 5 deniers or less.