METHOD OF MANUFACTURING POLYURETHANEUREA ELASTIC YARN FOR HIGH-SPEED SPINNING KEEPING HEAT RESISTANCE OF YARN

摘要

PURPOSE: A method of manufacturing polyurethaneurea elastic yarn for high-speed spinning is provided to keep heat resistance of yarn without changes of material properties of elongation even in the high-speed spinning. ;CONSTITUTION: The method of manufacturing polyurethaneurea elastic yarn for high-speed spinning is as follows. A prepolymer is obtained by firstly polymerizing polyol and an excessive quantity of diisocyanate. The prepolymer carries out a second polymerization by adding a chain extender to a solution obtained by being dissolved in an organic solvent. The chain extender includes diamine including ethylenediamine, 1,2-diaminopropane, 1,3-diaminopropane, 1,4-diamino butane, 2,3-diamino butane, 1,5-diaminopentane, 1,6-hexamethylenediamine and 1,4-cyclohexane diamine, and the diamine includes at least 5 mole % of aromatic diamine.;COPYRIGHT KIPO 2011