Products

Carbon Chopped Fiber & Milled Fiber (Short fiber)

Carbon Chopped Fiber & Milled Fiber (Short fiber)

Carbon Chopped Fiber is a product made by chopping carbon fiber tow.
Carbon Milled Fiber is a product made by grinding milling chopped fiber into a powder (milled) form. Chopped fiber is typically around 3 to 6 mm long, while milled fiber is typically less than 200 µm long. Both of these materials are used to enhance the physical properties of thermoplastic resins and rubbers, and to increase electrical and thermal conductivity.

Features

Mitsubishi Chemical’s lineup of short carbon materials can be broadly divided into two types.
One is chopped fiber, made from PAN-based carbon fiber; the other is chopped and milled fiber, made from
pitch-based carbon fiber.

The short-filament (chopped fiber) material made from PAN-based carbon fiber tow is used mainly to improve strength and elasticity, and to enhance electrical conductivity, electromagnetic shielding, fatigue resistance, and wear resistance for improved functionality. It also improves dimensional stability under environmental temperature changes due to its low coefficient of linear thermal expansion.

The short fiber (chopped and milled fiber) material made from pitch-based carbon fiber tow, is used mainly to provide high thermal conductivity, slidability, and to enhance antistatic performance and electrical conductivity.

Mitsubishi Chemical’s short carbon materials combine our own carbon fiber tow and original sizing technology (both of which deliver excellent performance), to provide both process passability and dispersibility during processing, as well as high added value to the matrix that serves as a base material.

Image of the features of Carbon Fiber Chopped Fiber and Milled Fiber (short fiber)

Applications

It can be added to various base materials (matrices) such as various thermoplastic and thermosetting resins, cement, concrete, graphite, coal tar, metals, and rubber to provide a variety of enhanced functionality.

Image of the Applications of Carbon Fiber Chopped Fiber and Milled Fiber (Short Fiber)

Product Lineup

Chopped fiber

Product name Carbon fiber type Sizing agent Sizing content
(%)
Fiber length
(mm)
Yarn properties (reference)
Tensile strength
(GPa)
Tensile modulus (GPa) Elongation (%) Thermal conductivity
(W/mK)
Electrical resistivity
(μΩm)
Density (g/cm3) Fiber diameter (μm)
TR06U PAN 24 ton
(regular tow)
Urethane-based 4.2 6 3.73 224 2.1 7 16 1.81 7
TR066A PAN 24 ton
(regular tow)
Epoxy-based 3.0 6 3.73 224 2.1 7 16 1.81 7
TR03CM PAN 24 ton
(regular tow)
Water 12.0 3 3.73 224 2.1 7 16 1.81 7
TR03M PAN 24 ton
(regular tow)
Water-soluble polyamide-based 1.5 3 3.73 224 2.1 7 16 1.81 7
TR06UL PAN 24 ton
(large tow)
Urethane-based 2.5 6 3.30 225 1.7 7 16 1.82 7
TR06NL PAN 24 ton
(large tow)
Polyamide-based 3.0 6 3.30 225 1.7 7 16 1.82 7
TR06YL PAN 24 ton
(large tow)
Special epoxy-based 4.2 6 3.30 225 1.7 7 16 1.82 7
TR03ML PAN 24 ton
(large tow)
Water-soluble polyamide-based 2.5 3 3.30 225 1.7 7 16 1.82 7
TR03CL PAN 24 ton
(large tow)
Water 1.2 3 3.30 225 1.7 7 16 1.82 7
MR03NE PAN 30 tons Polyamide-based 3.0 3 4.40 265 2.0 16 13 1.82 5
Product name Carbon fiber type Sizing agent Sizing
content
(%)
Fiber length
(mm)
Yarn properties (reference)
Tensile strength
(GPa)
Tensile modulus (GPa) Elongation (%) Thermal conductivity
(W/mK)
Electrical resistivity
(μΩm)
Density (g/cm3) Fiber diameter (μm)
K223SE PITCH 20 tons Polyamide-based 3.0-5.0 6 2.40 185 1.1 20 15.0 2.0 11
K237SE PITCH 65 tons Polyamide-based 1.0-3.0 6 2.60 640 0.4 140 6.6 2.1 11
K223HE PITCH 90 tons nil nil 6 3.80 900 0.3 550 2.3 2.2 11
K6371T PITCH 65 tons Epoxy-based 1.0-3.0 6 2.60 640 0.4 140 6.6 2.1 11

Milled fiber

Product name Carbon fiber type Sizing agent Sizing
content
(%)
Fiber length
(mm)
Yarn properties (reference)
Tensile strength
(GPa)
Tensile modulus (GPa) Elongation (%) Thermal conductivity
(W/mK)
Electrical resistivity
(μΩm)
Density (g/cm3) Fiber diameter (μm)
K223HM PITCH 90 tons nil nil 0.05/0.2 3.80 900 0.3 550 2.3 2.2 11
Product name Carbon fiber type Sizing agent Sizing content
(%)
Cut length
(mm)
Surface Resistivity *
[Ω/sq]
K223EM PITCH nil nil 0.2 10 7.5

* Surface resistivity: Measurement of milled product aggregate.
The figures in this table are typical values and not imply any kind of guarantee.

Customer Support

For detailed product specifications, pricing,
and usage information, please contact us.