High-modulus polyacrylonitrile filaments and fibers and a...

Details High-modulus polyacrylonitrile filaments and fibers and a... High-modulus polyacrylonitrile filaments and fibers and a...

D - Textiles, Paper

01

F

18/580, 18/634

D01F 6/18 (2006.01) D01D 5/16 (2006.01)

Patent

CA 1170011

-1- Abstract of the disclosure: The invention relates to filaments and fibers which comprises polyacrylinitrile or acrylinitrile co- polymers with a content of acrylonitrile units of at least 70% by weight preferably 90 or 99 % by weight, and which have an initial modulus of more than 1,300 cN/tex. The initial modulus is preferably 1,400 to 2,200 cN/tex and the tensile strength is at least 50 cN/tex at elongations at break of at most 15 %. Such filaments and fibers can be obtained by customary spinning, wet stretching, drying of -the filaments on hot drums and subsequent con-tact stretching of at least 1:1.5, the overall stretching being at least 1:9, prefer- ably 1:10 to 1:25. The resulting products distinguish themselves, in particular, when used in industrial fields, such as, for example, for the production of filaments intended for conversion -to carbon fibers, as reinforcing fibers for organic and inorganic materials and for the production of awnings, filters and the like.

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