DIFFERENT SHRINKAGE FLAME RETARDANT COMPOSITE YARN USING HIGH SHRINKAGE FLAME RETARDANT POLYMER AND MANUFACTURING METHOD THEREOF

摘要

The present invention relates to different shrinkage flame retardant composite yarn using a high shrinkage flame retardant polymer. The present invention is composite yarn manufactured by overfeed and heat treatment by using: core yarn which is produced by using a high shrinkage polyester to which 5-10 mol% of isophthalic acid compared to terephthalic acid and 1-5 mol% of diethylene glycol compared to ethylene glycol are added during polymerization; and effective yarn which is produced by using general polyester. In the core yarn, added isophthalic acid reduces the volume of the crystalline region of polyester; a contraction ratio is improved by 10-20% than the effect yarn since the diethylene glycol increases the volume of the amorphous region of the polyester and reduces the volume of the crystalline region; 5000-7000 ppm of phosphorus-based flame retardant is included respectively in the core yarn and the composite yarn; and a limit oxygen index is 30 or more.;COPYRIGHT KIPO 2017