Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1980-09-09
1982-11-02
Kendell, Lorraine T.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428364, 428372, D02G 300
Patent
active
043573894
ABSTRACT:
There is provided a shaping composite dope composition comprising a cellulose derivative, an acrylonitrile polymer and a solvent capable of substantially dissolving these polymeric materials simultaneously therein, and exhibiting flow birefringence or optical anisotropy. A composite fiber made from the dope has a strucute such that the cellulose derivative is present in the form of a dispersed phase of fine fibers in a matrix of the acrylonitrile polymer, the crystalline orientation angle of the acrylonitrile polymer phase is 18.degree. to 63.degree. as measured by wide angle X-ray diffractiometry, and the ratio of the crystalline orientation angle of the cellulose derivative phase to the crystalline orientation angle of the acrylonitrile polymer phase satisfies a specified requirement. The composite fiber is excellent in the thermal dimensional stability and mechanical properties, such as tensile strength and tensile elongation and loop strength and loop elongation.
REFERENCES:
patent: 2901813 (1959-09-01), Schappel
patent: 3575898 (1971-04-01), McClure
Cates et al., "Preparation and Properties of Fibers Containing Mixed Polymers, I. Polyacrylonitrile-Cellulose Acetate Fibers," Journal of Polymer Science, vol. XX, pp 155-180, (1956).
Ishida Atsushi
Ishitobi Tamio
Matsushita Tetsuo
Muraoka Shigemitsu
Satoh Eiji
Asahi Kasei Kogyo Kabushiki Kaisha
Kendell Lorraine T.
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