PA66 CF40 (LCF 40%) Composite

What is PA66 CF40?

LFT-G^® BC04B PA66 CF40 is a 40% long carbon fiber (china's) reinforced polyamide66(nylon66) Compound, that a fiber reinforced Long Fiber Thermoplastic (LFT) produced through a pultrusion process, which ensures that each pellet contains long, continuous strands of high-strength carbon fiber, fully impregnated within a tough Polyamide 66 (PA66) matrix. The "LCF40" designation signifies a 40% by weight content of Long Carbon Fiber. During the injection molding process, these fibers form a robust, three-dimensional skeletal network within the finished part. This internal structure is the source of its extraordinary mechanical properties, distinguishing it significantly from short carbon fiber (SCF) alternatives.

The PA66 matrix provides excellent thermal resistance, good chemical compatibility, and inherent toughness, while the long carbon fibers contribute properties that rival metals. This synergy results in a material that is not just a plastic, but a true engineering composite solution.

Core Benefits Of PA66 CF40:

• Extreme Stiffness-to-Weight Ratio: Delivers stiffness comparable to or exceeding some metals, at a fraction of the density. This is critical for applications where deflection under load is not an option.
• Superior Tensile Strength: The long fiber network efficiently distributes stress across the part, providing exceptional strength for load-bearing structural components.
• Inherent EMI/RFI Shielding: The conductive nature of the carbon fiber network provides effective electromagnetic and radio-frequency interference shielding for sensitive electronic components without secondary processing.
• High-Temperature Performance: The high-performance PA66 matrix ensures the material retains its mechanical properties at elevated operating temperatures, far exceeding standard polymers.
• Excellent Dimensional Stability: Exhibits a very low Coefficient of Thermal Expansion (CTE), ensuring parts maintain their precise dimensions and tolerances even with significant temperature fluctuations.

Technical Specifications Of PA66 LCF40 Datasheet

We believe in data-driven decisions. The following data, based on industry standards, illustrates the clear performance advantages of LFT-G^® PA66 CF40. All tests are performed on injection-molded specimens under controlled conditions according to ISO standards.

Typical Material Properties (Model: LFT PA66 CF40-BC04B)

Download Complete LFT PA66 CF40 (BC04B) Data Sheet PDF

Performance Comparison: LFT vs. Metals

Proven Applications & Case Studies

From the skies to the factory floor, LFT-G^® PA66 CF40 is enabling innovation where performance cannot be compromised. This material is ideal for complex, load-bearing parts that require a combination of low weight, high stiffness, and reliability.

 Image 2: Lightweighting industrial robot arms with LFT-G^® composites enables faster, more precise movements.

Key Advantages of Long Carbon Fiber (LCF) Technology

Beyond the primary specs, the "long fiber" aspect of our LCF technology provides distinct advantages over materials with short or chopped fibers.

• Ultimate Lightweighting Potential: Carbon fiber has one of the highest strength-to-density ratios of any commercially available material. By using long, continuous fibers, we maximize the translation of this inherent property into the molded part. This allows for the design of components that are not only lighter than aluminum but can even replace magnesium alloys, pushing the boundaries of what is possible in weight-sensitive designs.
• Integrated EMI/RFI Shielding: In an increasingly connected world, protecting sensitive electronics from electromagnetic interference (EMI) is critical. The interconnected network of long carbon fibers within our composite creates a natural Faraday cage effect. This provides effective shielding without the need for secondary processes like conductive coatings, vacuum metallization, or separate metal enclosures, thereby saving cost, time, and weight.
• Exceptional Dimensional Stability: Precision is paramount. LFT-G^® PA66 CF40 exhibits a very low, metal-like Coefficient of Thermal Expansion (CTE). This means that as temperatures fluctuate in the operating environment, the part will expand and contract minimally. This is crucial for applications with tight tolerances, such as optical mounts, precision measurement devices, and components that interface directly with metal parts, ensuring consistent performance and reliability.

Design & Processing Guidelines

To unlock the full potential of LFT-G^® PA66 CF40, proper design and processing are essential. As your technical partner, we provide these initial guidelines:

• Material Handling: Polyamide 66 is hygroscopic and must be properly dried before molding to prevent hydrolysis and property degradation. We recommend drying for 2-4 hours at 120°C (250°F).
• Tooling: Carbon fiber is abrasive. We strongly recommend using high-quality, hardened tool steel (e.g., P20, H13) for molds to ensure a long production life.
• Gate Design: To preserve fiber length, which is critical for performance, use large(>3mm), full-round, or tab-style sprue gates of injection molding for LFT material. Avoid pin-point or submarine gates that can break the fibers during injection.

 Advice the Sprue gate size Sheet of Injection molding made LFT material for large part.

• Part Design: Maintain generous radii in corners and uniform wall thicknesses wherever possible to promote smooth melt flow and prevent stress concentrations.

Frequently Asked Questions (FAQ)