Day-spinning polyacrylonitrile containing carboxyl groups...

Details Day-spinning polyacrylonitrile containing carboxyl groups... Day-spinning polyacrylonitrile containing carboxyl groups...

D - Textiles, Paper

01

D

18/612

D01D 5/04 (2006.01) D01F 6/18 (2006.01) D01F 6/54 (2006.01)

Patent

CA 1097865

ABSTRACT OF THE DISCLOSURE The invention relates to a process for the production of filaments and fibres having a moisture absorption of at least 7 % and a water retention capacity of at least 25 % by dry-spinning an acrylonitrile copolymer, con- taining more than 50 mval of carboxyl groups from a solvent, which contains 5 to 50 % by weight, based on the total weight of solution, of a compound has been added, which compound has a boiling point higher than that of the spinning solvent and which is miscible with water and the spinning solvent and which is non-solvent for the copolymer, washing the compound added to the solvent out of the freshly spun filaments and fibres and partly or completely converting the carboxyl groups into the salt form. The invention further relates to dry-spun filaments and fibres having a core and sheath structure, comprising a fibre-forming acrylonitrile copolymer having more than 50 mval of carboxyl and carboxylate groups and having a moisture absorption capacity of at least 7 % and a water retention capacity of at least 25 %.

272055

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