Title: Synthetic filaments and fibres with high moisture absorption and water retention capacity

Abstract: 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, containing more than 50 mval of carboxyl groups from a solvent, which contains 5 to 50% by weight of a compound with properties defined herein, 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%.

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Inventors: Radlmann, Eduard (Dormagen, DE, US)
Reinehr, Ulrich (Dormagen, DE, US)
Nischk, Gunther (Dormagen, DE, US)

Application Number: 769724
Filing Date: 1977-02-17
Publication_date: 1979-03-06
Assignee: Bayer Aktiengesellschaft (Leverkusen, DE)
Primary Class(es): 428/373 264/206, 428/374, 428/398
Other Classes:
US Patent Ref:

3038238	Jun, 1962	Wu	428/374.
3957936	May, 1976	Lauchenauer	428/398.
3984515	Oct, 1976	Mommaerts	428/398.
3984601	Oct, 1976	Blickenstaff	428/376.

Other Refs:
Primary Examiner: Kendell, Lorraine T.
Assistant Examiner:
Attorney: Plumley and Tyner