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METHOD FOR PREPARING POLYURETHANEUREA ELASTIC FIBER WITH IMPROVED HEAT SETTABILITY AND POLYURETHANEUREA ELASTIC FIBER PREPARED BY THE SAME
METHOD FOR PREPARING POLYURETHANEUREA ELASTIC FIBER WITH IMPROVED HEAT SETTABILITY AND POLYURETHANEUREA ELASTIC FIBER PREPARED BY THE SAME
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机译:具有改善的热定型性的聚四氟乙烯弹性纤维的制备方法和用该方法制备的聚四氟乙烯弹性纤维
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摘要
The present invention relates to a method for preparing polyurethaneurea elastic fiber, the method comprising reacting a mixture of at least one diisocyanate comprising 4,4'-diphenylmethanediisocyanate and 7 to 25 mole % of 2,4'-diphenylmethanediisocyanate with polyol to produce a prepolymer, and polyurethaneurea elastic fiber prepared by the same. The polyurethaneurea elastic fiber of the present invention has superior spinning workability, improved yarn evenness, and high heat-set efficiency even at low temperature.
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