SIGRAFIL® Carbon Fibers

For high-tech applications requiring high strength and stiffness combined with light weight, SIGRAFIL continuous Carbon fiber tows are indispensable. They form the basis for high-performance textiles, pre-impregnated products, and components made from fiber-reinforced plastic (CFRP).

Fibers that transform ideas into reality

We manufacture SIGRAFIL continuous carbon fiber tows on the basis of polyacrylonitrile (PAN) fiber. To guarantee the very highest quality, we produce our SIGRAFIL continuous carbon fiber tows exclusively in our plants in Europe and North America. In addition, our customers benefit from our unique expertise in 50k fibers across all processing stages. By making application-tailored adjustments, we can provide individual solutions for different requirements and processes.

Best mechanical properties
Low density (light weight)
Good electrical conductivity
Excellent impregnation behavior
Good spreadability

Typical properties	Units	C T50-4.0/240	C T50-4.6/260	C T50-4.8/280
Number of filaments		50k	50k	50k
Fineness of yarn dry	tex (g/1000m)	3420	3420	3070
Density	g/cm³	1.80	1.80	1.78
Single filament diameter	µm	7.0	7.0	6.6
Tensile strength	GPa	4.0	4.6	4.8
Tensile modulus	GPa	240	260	280
Elongation at break	%	1.70	1.70	1.65
Single filament resistivity	µΩm	15	17	16

By applying different types of sizing, the carbon fibers can be optimally matched to different matrix systems. In this way, it is possible to produce application-tailored versions as well as the standard materials. So, together with our customers, we find optimized solutions for their challenges.

Matrix compatibility
Epoxy, polyurethane, phenolic
Vinyl ester (sand all radical-based curing systems), unsaturated polyester
Polyurethane, polycarbonate, polyester, polysulfone, cyanate ester, polyamide, BMI, PESU, PEEK, PEKK, PVC, polyimide
Polypropylene
Polyamide
PA-RIM process (in-situ polymerization of caprolactram, e.g. reactive PA processing)