Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1985-04-29
1987-05-05
Kendell, Lorraine T.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
2641771, 428401, D02G 300
Patent
active
046632328
ABSTRACT:
Disclosed is an acrylic fiber composed of an acrylonitrile homopolymer or copolymer whose surface consists of particulate and/or microfibrillar structures having a width of 0.01 to 0.5 .mu.m and a length of 0.05 to 10 .mu.m and fibrillar structures formed by aggregation of the particulate and/or microfibrillar structures and having a width of 0.1 to 10 .mu.m and a length of at least 50 .mu.m. The fiber is prepared by spinning a dope of an acrylonitrile homopolymer or copolymer in a solvent at a draft ratio of at least 5 into a coagulating bath comprising a solvent and a coagulant and having a composition such that a skin layer is not formed on the coagulated fiber; taking up the coagulated fiber from the coagulating bath so that the retention time in the coagulating bath is within 60 seconds; and then drawing the fiber in a drawing bath comprising a solvent and a coagulant and having a coagulating property to the dope and a composition such that a skin layer is not formed on the fiber.
REFERENCES:
patent: 4448740 (1984-05-01), Sawanishi et al.
M. Takahashi: "Seni Gakkai Shi", vol. 17, pp. 243-252 (1961).
Honda Yutaka
Kajita Shuji
Kamide Kenji
Asahi Kasei Kogyo Kabushiki Kaisha
Kendell Lorraine T.
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