Set polyacrylonitrile filaments and fibers, and a process...

Details Set polyacrylonitrile filaments and fibers, and a process... Set polyacrylonitrile filaments and fibers, and a process...

D - Textiles, Paper

01

F

18/624

D01F 6/18 (2006.01)

Patent

CA 1171214

- 1 - HOE 81/F 054 Abstract of the disclosure: Filaments and fibers spun from at least 98% by weight of polyacrylonitrile and relative viscosities between 2.5 and 6.0 have tensile strengths of more than 50 cN/tex with an elongation at break of at most 15% and a shrinkage at the boil of less than 5% and they are distinguished by an increased resistance to swelling and hydrolysis. The process for their production comprises at least 2 stretching steps with a minimum stretch ratio of 1 : 9 as well as a concluding setting stage in which the filaments are treated without shrinkage in dry heat at 170 to 280°C.

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