Study On Preparation And Properties Of COPEET/HSPET Bicomponent Elastic Fiber

In the paper,the COPEET/HSPET side-by-side biconstituent fiber was prepared with the copolyether ester(COPEET)and high shrinkage polyster(HSPET)as raw materials to prepare in different heat setting temperature,and the spun fibers had been experimented on heat treatment,the effects of heat-set temperature and heat' treatment on structure and properties of COPEET/HSPET side-by-side compound fiber were discussed.The results show that the cross-section of COPEET/HSPET side-by-side compound fiber,which is symmetric dumbbell-shape,are composed of two components with good compatibility.Compound fiber is helical crimp,the HESPET component is inside of the crimp,COPEET component is outside.DSC and XRD results show that the crystallinity of fiber is rise up along with the increase of heat-set temperature,and the difference in supramolecular structures of the two components become more obvious so as to make fiber having better thermal shrinkage potential.In heat treatment at 90?,the COPEET/HSPET side-by-side bicomponent fiber of heat-set temperature at 180? has bigger shrinkage,higher crimp amplitude,more number of crimps.Also the degree of crystallinity increased after boiling treatment test.The elastic recovery of the elastic COPEET/HSPET composite fibers is about 99%in 50%elongation tensile text,and the elastic recovery of sample fiber is about 97%when the elongation is 100%furthermore the ultimate elongation of fiber is 150%.The COPEET/HSPET compound fiber could be deep dyed in boiling dyeing.The rate of dying PTT/PET fiber is lower than it in the same dyeing condition.The COPEET/HSPET compound fiber with large heat shrinkage has the excellent rate of dyeing and crimp properties.