POLYESTER LATENT CRIMP YARN HAVING IMPROVED SPOT DYEING AND POLYESTER FABRICS WITH EXCELLENT SHRINKAGE

摘要

A polyester latent crimp yarn and the polyester fabrics with excellent shrinkage having the improved spot dyeing by using the same are provided to reduce the deviation at the weight reduction rate and speed between the PTT and PET. The polymers with first and second components are melted separately, spun by separate injection holes, attached at the spinnerets. The first component is PTT(Poly Trimethylene Terephthalate). The second component is a PET-co-PTT co-polymer by melted and mixed PET(Poly Ethylene Terephthalate) with PTT of 5- 15 wt %. The PTT as the first component of 5-3 wt % is contained in the latent crimp yarn compared to the PET-co-PTT co-polymer as the second component. The inherent viscosity of the PTT is 0.90-1.10 dl/g and the inherent viscosity of the PET is 0.50-0.65 dl/g.