Chopped Carbon Fiber
Chopped carbon fiber adds strength, stiffness, and electrical conductivity to composites with minimal added weight, making it one of the most effective reinforcement materials in modern composite engineering.
Rocket-Fibers’ chopped carbon fibers are precision cut for consistent length and a compact bundle structure that distributes evenly throughout the resin. A 1% epoxy-compatible sizing promotes strong fiber-to-resin bonding in thermoset systems, making them well suited for compression-molded “forged” carbon parts and as reinforcement in thermoset molding compounds, construction materials, and plastics.
Available in standard and intermediate modulus grades in 1/4" and 1/2" lengths, our chopped carbon fiber is in stock and ready to ship. Purchase directly through our website, or contact us for competitive pricing on larger volume requirements. Custom cut lengths are available upon request.
For thermoplastic compounding, oversized chopped carbon fiber is also available with sizings matched to polyamide (nylon), polypropylene, polyethylene, polycarbonate, PPS, PEEK, and PEI. Contact us to select the right grade for your process.
About This Item
Physical Properties & Performance
Carbon fiber combines very high tensile strength and modulus with low elongation and minimal creep, so composites hold their shape under load and over time.
Break Strength
Very high tensile strength
Modulus
Exceptional stiffness
Elongation
Very low stretch under load
Strength : Weight
High strength at low density
Creep
Minimal deformation over time
Product Performance
- High tensile strength and stiffness-to-weight ratio
- Excellent dimensional stability and low thermal expansion
- Adds electrical and thermal conductivity
- Strong chemical and corrosion resistance
- Improves composite fatigue resistance and durability
Carbon Fiber Resistance Guide
Carbon fiber holds its strength across extreme hot and cold, resists UV and most chemicals, and absorbs almost no moisture. Its main limitation is flame: it should not be used where an open flame is present.
Ultraviolet
Maintains strength under prolonged sunlight
High Heat
Stable well above most resin limits
Sub-Zero
Retains properties in freezing conditions
Cryogenic
Functional at extreme low temperatures
Chemical
Resists most acids, alkalis and solvents
Moisture Regain
Absorbs virtually no moisture
Abrasion
Protect from rubbing contact
Flame
Not for use near open flame
Operating Temperatures
Fiber values. The sizing and your resin system will typically set the upper service limit of the finished part.
Chemical Compatibility
Chopped Carbon Technical Specifications
| Property | Standard Modulus | Intermediate Modulus |
|---|---|---|
| Cut Length | 1/4" (6 mm) · 1/2" (12 mm) | 1/4" (6 mm) · 1/2" (12 mm) |
| Filament Diameter | 7 µm | 5 µm |
| Sizing | Epoxy-compatible | Epoxy-compatible |
| Sizing Level | 1.0% | 0.5% |
| Tensile Strength | ≥ 4,900 MPa (≥ 710 ksi) | Contact us |
| Density | 1.80 g/cm³ (0.065 lb/in³) | Contact us |
| Custom Lengths | Available upon request | |
Typical values. A batch-specific Certificate of Analysis (COA) is available with your order.
Product Details
- Manufactured in the USA
- Standard and intermediate modulus grades
- Precision cut to 1/4" (6 mm) or 1/2" (12 mm) standard lengths
- 1% epoxy-compatible sizing for thermoset resin systems
- Compact bundle structure for even distribution in resin
- Natural black color
- Custom cut lengths available upon request
Suggested Applications
Need Something Custom?
Rocket-Fibers works with engineers, manufacturers, and R&D teams on custom fiber solutions, sourcing requests, and technical guidance.
- Custom cut lengths
- Alternative & oversized sizings
- Low minimum order quantities
- Batch COA with lot traceability