The Optimal Flow-Stiffness Balance for Complex Geometries
LFT-G® PA66 LCF40 is engineered to solve the most demanding injection molding challenges where both extreme rigidity and complex part architectures intersect. While 50% fiber loadings can struggle to fill intricate ribs and bosses, this 40% long carbon fiber compound provides the perfect rheological sweet spot. It ensures complete mold filling and fiber length retention across variable wall thicknesses, delivering an exceptional 21,000+ MPa modulus alongside inherent anti-static and conductive properties.
Typical values shown above are for quick engineering reference. Actual molded-part performance is highly dependent on gate sizing, which prevents fiber degradation during complex cavity filling.
PA66 LCF40 Material Identification & Specifications
This section defines the commercial grade, polymer system, and key material characteristics of LFT-G® PA66 LCF40.
| Property | Specification |
|---|---|
| Product Grade | LFT-G® PA66 LCF40 |
| Material Type | 40% Long Carbon Fiber Reinforced Polyamide 66 |
| Polymer Matrix | Polyamide 66 (PA66 / Nylon 66) |
| Glass / Carbon Content | 40% Carbon Fiber |
| Available Color | Black |
| Form / Pellet Length | Pellets (Length: 10mm - 12mm) |
| Processing Method | Injection Molding |
| Typical Positioning | Complex Geometry Structural Replacement |
Typical Material Properties of PA66 LCF40
| Property | Standard | Value |
|---|---|---|
| Density | ISO 1183 | 1.31 g/cm³ |
| Molding Shrinkage | ISO 294-4 | 0.10–0.20% |
| Tensile Strength | ISO 527 | 267 MPa |
| Tensile Modulus | ISO 527 | 30,255 MPa |
| Elongation at Break | ISO 527 | 0.7–1.5% |
| Property | Standard | Value |
|---|---|---|
| Flexural Strength | ISO 178 | 379 MPa |
| Flexural Modulus | ISO 178 | 20,558 MPa |
| Notched Charpy Impact | ISO 179 | 28 kJ/m² |
| HDT (1.8 MPa) | ISO 75-2 | 255 °C |
| Surface Resistivity | IEC 60093 | 10³ – 105Ω (Conductive) |
Typical values are provided for engineering reference. They are not intended as specification limits. Actual molded-part performance depends on processing temperatures and mold design.
Injection Processing Guidelines for PA66 LCF40
Dehumidifying
85–110°C / 4–6h
Strictly dry to < 0.1% moisture
Melt Temp
280–300°C
Optimize for complex variable walls
Mold Temp
80–120°C
Improves surface aesthetics
Gate Sizing
Generous Gates
Crucial for preserving fiber length
Engineering Advisory: While PA66 LCF40 flows better than LCF50, it is a long-fiber thermoplastic (pellet length ~10mm). It is NOT recommended for ultra-thin micro-components (e.g., <1mm wall thickness) as narrow cavities will aggressively shear and break the carbon fibers, neutralizing the mechanical advantages of the LFT compound.
Engineered for Complex Structural Geometries
PA66 LCF40 bridges the gap between maximum structural reinforcement and injection moldability, making it the supreme choice for advanced components featuring intricate ribs, mounting bosses, and variable wall thicknesses.
Industrial Fluid Impellers & Rotors
Engineering challenge: Centrifugal pump impellers possess highly complex, curved blade geometries. Under intense fluid pressure and cavitation, standard plastics deform, destroying pump efficiency.
Why PA66 LCF40: The 40% loading provides the exceptional flow needed to perfectly mold the intricate blade curves, while the resulting 21,000 MPa modulus ensures absolutely zero blade deflection during high-RPM operation.
Professional Optical & Camera Chassis
Engineering challenge: High-end optical instruments feature complex internal mounting grids with widely varying wall thicknesses. They require absolute dimensional stability; even microscopic thermal expansion ruins optical alignment.
Why PA66 LCF40: The internal carbon fiber skeleton reduces the Coefficient of Linear Thermal Expansion (CLTE) to near-zero levels, mimicking magnesium alloys while slashing the total weight of the equipment.
Advanced Sporting Goods (Bicycle Components)
Engineering challenge: Components like professional bicycle derailleur cages and cleat pedals endure explosive, asymmetric torque loads. They feature highly complex 3D aerodynamic shapes and thick bearing mounts.
Why PA66 LCF40: It empowers engineers to injection-mold highly complex, torque-resistant sporting architectures in a single shot-achieving the elite rigidity of hand-laid carbon fiber without the exorbitant manufacturing costs.
Explore Related Long Carbon Fiber Grades
LFT-G provides a complete spectrum of long carbon fiber formulations. Select the exact grade based on your specific flowability, shielding, and structural requirements.
PA66 LCF30
30% carbon fiber offering superior injection moldability, excellent surface finish, and potent anti-static properties.
View Grade →PA66 LCF40
40% carbon fiber providing an optimized balance of immense structural rigidity and complex-geometry flowability.
Current GradePA66 LCF50
The absolute pinnacle of reinforcement, engineered exclusively for maximum load-bearing and robust EMI shielding.
View Grade →
Request PA66 LCF40 Technical Trial Sample & Quotation 
Facing injection molding issues with 50% fiber? Contact the LFT-G engineering team to discuss how PA66 LCF40 can resolve your complex geometry challenges, and request a 25KG technical trial sample today.
Request 20KG LCF40 Trial Sample
Email Inquiry: Candyhu@lfrtplastic.com
WhatsApp Directly: +86 13950095707
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