公开(公告)号：US20230383123A1

公开(公告)日：2023-11-30

申请号：US18247221

申请日：2021-09-29

申请人： TORAY OPELONTEX CO., LTD

发明人： Kazutake MORITA ,  Toshihiro TANAKA

IPC分类号： C08L75/08 ,  C08G18/76 ,  C08G18/48

CPC分类号： C08L75/08 ,  C08G18/7671 ,  C08G18/4854 ,  C08L2205/025 ,  C08L2203/12

摘要： Problem To provide a polyurethane elastic yarn having good heat setting properties in a wide temperature range and high thermal adhesive strength in a wide temperature range while also maintaining its elastic properties (permanent deformation and elongation). Solution A polyurethane elastic yarn comprising polyurethane polymer [A] and polyurethane polymer [B] below, wherein the ratio of polyurethane polymer [A] to polyurethane polymer [B] in terms of parts by mass is from 1:99 to 30:70 or from 70:30 to 99:1, the exothermic peak (crystallization peak) of the polyurethane elastic yarn as measured by a differential scanning calorimeter (DSC) is in the range from 110° C. to 210° C., and the heat capacity at the exothermic peak is 3.0 J/g or more and 100 J/g or less. Polyurethane polymer [A]: a polyurethane polymer using as starting materials polymer diol A whose main chain repeating unit is an ether or an ester, diisocyanate A whose main skeleton is aromatic or aliphatic, and a single low molecular weight diol A having from 2 to 4 carbon atoms CA serving as a chain extender. Polyurethane polymer [B]: a polyurethane polymer using as starting materials polymer diol A, diisocyanate A, and a single low molecular weight diol B having from 1 to 4 carbon atoms CB more than CA serving as a chain extender.