PA66-LCF60: Ultra-High Reinforcement Long Carbon Fiber Polyamide 66 for Extreme Structural and Thermal Performance

PA66-LCF60 is an elite grade polyamide 66 (PA66) composite fortified with 60% long carbon fiber (LCF), engineered for applications requiring peak mechanical strength, rigidity, and thermal endurance. With its exceptionally high fiber content, PA66-LCF60 provides structural performance rivaling lightweight metals, while retaining the moldability, corrosion resistance, and weight saving advantages of thermoplastics.

The dense network of long carbon fibers dramatically enhances stiffness, tensile strength, and fatigue resistance—enabling reliable, long-life performance in the harshest mechanical and environmental conditions. PA66-LCF60 is tailored for critical load bearing components in automotive, industrial, and aerospace sectors where performance cannot be compromised.

Key Mechanical Properties

Tensile Strength: ≥ 190 MPa

Flexural Strength: ≥ 250 MPa

Notched Impact Strength: ≥ 15 kJ/m²

The 60% LCF reinforcement forms a rigid internal skeleton that maximizes load transfer, resists deformation, and ensures stability under bending, torsion, and shock loads. PA66-LCF60 delivers mechanical properties well beyond traditional engineering plastics—making it a top tier alternative to metal alloys for structural applications.

Thermal and Chemical Resistance

Heat Deflection Temperature (HDT): Approx. 155°C

Long-Term Service Temperature: Up to 145°C

Chemical Resistance: Excellent resistance to oils, greases, fuels, and dilute acids/alkalis; not recommended for strong acids or oxidizers

PA66-LCF60 excels in thermally aggressive environments, maintaining mechanical integrity under continuous heat exposure. This makes it ideal for engine bay parts, thermal enclosures, and industrial machines operating near heat sources.

Wear Resistance and Processability

Wear Resistance: Outstanding—ideal for sliding, rotating, or load cycling parts

Processing Methods: Injection molding (using LCF capable equipment), compression molding

Processing Notes: Low shear molding conditions and hardened tool steel are essential to retain fiber length and ensure uniform dispersion

Despite its high fiber content, PA66-LCF60 remains processable with appropriate equipment. Its long fiber structure provides exceptional wear resistance and reduced creep, extending service life even under harsh mechanical cycles.

Environmental Stability

Water Absorption: Significantly lower than unreinforced PA66

Dimensional Stability: Excellent in high humidity and thermal cycling environments

The densely packed LCF network minimizes moisture uptake and thermal distortion, allowing PA66-LCF60 to maintain critical tolerances and stability in demanding outdoor or fluctuating environments.

Typical Applications

PA66-LCF60 is ideal for ultra high performance structural components in sectors that demand strength, light weight, and precision:

Automotive:

Engine cradles, crossmembers, and subframe elements

High stress brackets and mountings

Plastic metal hybrid load structures

Industrial:

Structural machine frames and supports

Robotic joints, arms, and fatigue resistant mechanisms

Impact and vibration resistant enclosures

Electronics & Aerospace:

Heat resistant structural frames

High load casings for ruggedized equipment

Precision mechanical parts under thermal and vibrational stress

PA66-LCF60 Performance Summary