D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
18/9
D01F 9/22 (2006.01) D01F 11/12 (2006.01)
Patent
CA 1109616
ABSTRACT OF THE DISCLOSURE An improved acrylic carbon fiber and a process for producing the same are disclosed, which acrylic carbon fiber has high strength and an improved resistance to thermal oxidation. The acrylic carbon fiber contains at least about 50 ppm of a phosphorus compound, a boron compound or a mixture thereof, and at least about 100 ppm as zinc compound, a calcium compound or a mixture thereof. The process for producing the acrylic carbon fiber comprises producing an acrylonitrile polymer from a monomer solution containing at least acrylonitrile, spinning the acrylo- nitrile polymer to produce an acrylonitrile fiber, preoxidizing the acrylonitrile fiber to produce a preoxidized fiber and carbon- izing the fiber to produce a carbon fiber, and wherein at least one of a phosphorus compound and a boron compound, and, at least one of a zinc compound and a calcium compound are incorporated into or deposited on to at least one of the monomer solution, the acrylonitrile polymer solution, the acrylonitrile fiber, the preoxidized fiber and the carbon fiber, in at least one step, such that the carbon fiber ultimately contains at least about 50 ppm of a phosphorus component, a boron component or a mixture thereof and at least about 100 ppm of a zinc compound, a calcium component or a mixture thereof.
309358
Kogo Yasuo
Saito Kazuhisa
George H. Riches And Associates
Toho Beslon Co. Ltd.
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