Engineer lighter, stronger parts with our Long Carbon Fiber Reinforced Polypropylene (LCF PP) material. Featuring superior creep resistance, EMI shielding, and a skeletal fiber network for extreme durability.
LCF PP Composite Material: High-Strength Engineering Alternative
In the modern pursuit of extreme light weighting-driven by the New Energy Vehicle (NEV) revolution and advanced robotics-standard plastics often lack the necessary stiffness, while metals remain too heavy and costly to process.
Long Carbon Fiber Reinforced Polypropylene (LCF PP) compound resin represents a paradigm shift in thermoplastic composites. It is not just a material; it is a structural solution designed to bridge the gap between polymer agility and metallic strength.
Why "Long" Fiber Matters
The secret to our material's performance lies in its skeletal network structure. Unlike short carbon fiber (SCF) composites, where the fibers are randomly distributed, our unique impregnation technique ensures that the fibers run through the entire length of the particles (typically cut to 10 millimeters to 12 millimeters).
During the injection molding process, these long fibers interweave with each other, forming a strong three-dimensional internal framework. This structure effectively prevents crack propagation and disperses stress, thereby creating a material with the strength of cast aluminum but with a weight reduction of up to 40%.
Engineering Benefits
Engineers specify our LCF PP compounds to solve complex design challenges where performance cannot be compromised:
Extreme Specific Stiffness: Achieving an outstanding strength-to-weight ratio. LCF PP composite is lighter than steel and also lighter than glass fiber reinforced nylon in weight. This significantly enhances the range of electric vehicles and the payload capacity of drones.
Superior Creep & Fatigue Endurance: The continuous fiber network resists deformation under constant load, making it ideal for dynamic structural parts where standard plastics would fail over time.
Intrinsic EMI Shielding: Due to the high aspect ratio of the carbon fibers, a conductive network is formed even at lower loading levels, providing natural Electromagnetic Interference (EMI) shielding for sensitive electronics.
Thermal & Dimensional Stability: With a high Heat Distortion Temperature (HDT) and low Coefficient of Linear Thermal Expansion (CLTE), parts maintain precise tolerances even in harsh thermal environments.
LCF PP of Typical Data (Taking LCF30 PP as an example)
Mechanical PropertiesProperty |
Value |
Unit |
Test Standard |
|---|---|---|---|
| Tensile Strength | 90-110 | MPA | ISO 527 |
| Tensile Modulus | 14000-15000 | MPA | ISO 527 |
| Elongation at Break | 0.5-1.5 | % | ISO 527 |
| Flexural Strength | 120-140 | MPA | ASTM D-790 |
| Flexural Modulus | 10000-11000 | MPA | ASTM D-790 |
Strategic Applications
New Energy Vehicles (NEV)
Challenge: Offset heavy battery weight to increase range.
Solution: Battery tray carriers, center consoles, and front-end modules. LCF PP replaces steel brackets, reducing part weight while maintaining crash safety.
Industrial Robotics & Automation
Challenge: High inertia in robot arms slows down cycle times.
Solution: Lightweight robotic joint arms and end-effectors. Reducing the mass allows for faster acceleration and lower energy consumption.
Aerospace & UAVs
Challenge: Maximize flight time and payload.
Solution: High-stiffness drone arms, propellers, and landing gear. The material's damping properties also reduce vibration noise compared to metals.
FAQ
Q: Could we use a high back pressure to make the color mixing of LCF PP more uniform?
A: The strong shear force generated by high back pressure will directly cut the long fibers, causing the high-performance long-fiber material to instantly downgrade to ordinary short-fiber material, and the impact resistance will sharply decrease. Therefore, a low back pressure must be used.
Q: How to determine whether to choose LCF PP material
A: Observe the environment. In a high-temperature and high-humidity environment, the hydrophobic state of PP ensures that its properties remain unchanged.
Q: What should we do if there are ugly "floating fibers" on the surface?
A: Increase the mold temperature and injection speed to allow the resin to concentrate on the surface.
Processing Guide
To maximize the mechanical properties of LCF PP plastic pellet, it is crucial to maintain the fiber length during the injection molding process:
Screw design: Utilize screws with a low compression ratio and low shear force.
Molding gate system: Utilize open nozzles and large mold gates (avoid pinpoint molds) to facilitate the flow.
Die temperature: Keep the mold at the appropriate temperature to ensure the smoothness of the resin-coated surface.
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