Title: Conjugate polycarbonate fibers and fibrous sheets made thereof

Abstract: A conjugate polycarbonate fiber comprising 95% to 50% by weight of a polycarbonate component and 5 to 50% by weight of a polypropylene component wherein ultrafine fibers composed of the polypropylene component are dispersed and arranged in a bundle-like form in the polycarbonate component as the fiber matrix, whereby the crazing resistance and oil resistance are improved. The conjugate polycarbonate fiber can be made into fibrous sheets and non-woven fabrics. The non-woven fabrics are adapted to be used as insulating layers in electric power cables.

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Inventors: Matsumoto, Kounosuke (Moriyama, JA)
Tamura, Tadashi (Moriyama, JA)
Morita, Akira (Moriyama, JA)
Imayasu, Sigeru (Moriyama, JA)
Nomura, Toshio (Shiga, JA)

Application Number: 599327
Filing Date: 1975-07-28
Publication_date: 1976-12-07
Assignee: Japan Vilene Company Ltd. (Toyko, JA)
Primary Class(es): 442/363 156/181, 156/296, 156/305, 174/25R, 174/110SR, 428/373, 428/374, 428/412
Other Classes:
US Patent Ref:

3063454	Nov, 1962	Coates et al.	156/305.
3429983	Feb, 1969	Hofmeier	156/53.
3516239	Jan, 1970	Fukuda et al.	428/412.
3562374	Feb, 1971	Okamoto et al.	264/174.
3567548	Mar, 1971	Miller	156/72.
3645819	Feb, 1972	Fujii et al.	156/296.
3706613	Dec, 1972	Masamichitoki et al.	156/296.
3716614	Feb, 1973	Okamoto et al.	156/296.
3775549	Nov, 1973	Matsuda et al.	174/120.
3830683	Aug, 1974	Bohrn	8/130.
3914501	Oct, 1975	Miller et al.	428/297.

Other Refs:
Primary Examiner: Powell, William A.
Assistant Examiner: Ball, Michael W.
Attorney: Woodhams, Blanchard and Flynn