Carbon fiber

Kynol carbon fiber has an amorphous structure and has different properties from other commercially available carbon fibers. These carbon fibers have low strength, softness, flexibility, and low thermal conductivity.

Typical Properties

Typical Properties of Kynol Carbon Fiber

Fiber diameter 10〜40um
Specific gravity 1.5〜1.6
Carbon content >95wt%
Tensile Strength 500〜700 N・mm¯²
Elongation 2〜3%
Modulus 20,000〜30,000 N・mm¯²
Heat resistance 350℃×3h … ０wt.Loss,% 400℃×4h … 2.8wt.Loss,%
Specific resistance 30〜50 μΩ・m

Typical Properties of Carbon Fibers

Kynol

(GCI)

Polyacrylonitrile

(Standard type)

Pitch

(Isotropic type)
Specific gravity 1.5〜1.6 1.7〜1.8 1.6〜1.7
Fiber diameter（um） 10〜40 7〜10 10〜20
Tensile strength（N・mm¯²） 500〜700 2,500～5,000 500～800
Modulus（N・mm¯²） 20,000〜30,000 200,000〜350,000 20,000〜40,000
Carbon content（wt%） 95 92.6 95.3
Initial wt. – loss temp.（TGA, air, ℃) 430 486 416
Heat resistance in air （wt.loss ％) 350℃×3hr 0 0 0
400℃×4hr 2.8 2.4 3.1
Specific Resistivity（μΩ・m） 30～50 10～20 30～50

Specific Resistivity(CF)

Kynol Carbon Fiber(TG)

Due to its amorphous structure, Kynol carbon fiber has high electrical resistivity and low thermal conductivity. This makes it suitable for heat insulation material.
Characteristics of Kynol carbon fiber are completely different from the high-strength carbon fibers that are widely available in the world. When Kynol is carbonized, it does not have a crystalline structure like acrylic carbon fiber, but instead has a non-crystalline (amorphous) structure, so it has low strength and flexibility.