PROCESS FOR PREPARING YARN DERIVED FROM ARAMID COPOLYMER FIBER HAVING LOW RESIDUAL SULFUR
摘要
The present invention concerns processes for producing a yarn comprising polymer comprising imidazole groups, the process having the following steps: (a) spinning a solution of polymer in sulfuric acid to give rise to a plurality of dope filaments; (b) coagulating the plurality of dope filaments into a multi-filament as-spun yarn; and (c) washing the as-spun multi-filament yarn with an aqueous acid comprising a halide or an aqueous salt comprising a halide or combination thereof.
申请公布号
EP2802689(B1)
申请公布日期
2016.11.23
申请号
EP20120701801
申请日期
2012.01.11
申请人
E. I. DU PONT DE NEMOURS AND COMPANY
发明人
ALLEN, STEVEN R.;GABARA, VLODEK;LOWERY, JOSEPH LENNING;LUSTIG, STEVEN, R.;NEWTON, CHRISTOPHER WILLIAM;RODINI, DAVID J.;SITTER, ANDREW J.