The friction coefficient of PPA-CF is typically lower than that of standard PPA, as its carbon fiber reinforcement provides better lubrication, reducing friction and wear, and enhancing performance under high friction conditions.
Dimensionally Stable PPA-LCF40
PPA-LCF40 is a high performance polyphthalamide reinforced with 40% long carbon fibers, offering near metal strength (~180–195 MPa), exceptional stiffness (~15–17 GPa), and excellent thermal stability (HDT ~290 °C). Ideal for structural parts in automotive, electronics, and industrial systems where high load, heat, and chemical resistance are required.
- Model number: PPA-LCF-BCA4
- Matrix Resin: Personal Package Archive (PPA)
- Reinforcing Filler: Carbon fiber
- Appearance: Granules
- Grade: Injection/extrusion grade
- Packaging: 25kgs/bag
PPA-LCF40 | 40% Long Carbon Fiber Reinforced Polyphthalamide
PPA-LCF40 is an ultra high performance, semi crystalline engineering thermoplastic reinforced with 40% long carbon fibers, designed to deliver metal like mechanical strength, extreme stiffness, and long term dimensional stability. The high loading of long carbon fibers provides optimal load transfer across the polymer matrix, giving the material outstanding fatigue resistance, impact performance, and creep control.
Compared to lower fiber grades such as PPA-LCF30 or short fiber compounds like PPA-CF50, PPA-LCF40 significantly enhances structural capability, enabling it to replace metal in highly loaded, weight sensitive, and chemically aggressive environments. It is ideal for demanding applications in automotive, industrial, and electrification sectors, where both mechanical performance and environmental resistance are critical.
Core Performance Highlights
Mechanical Properties
Carbon Fiber Content: 40% (long carbon fibers for maximum structural reinforcement)
Tensile Strength: ~180–195 MPa — very high load bearing capability
Flexural Modulus: ~15–17 GPa — exceptional stiffness under stress
Elongation at Break: ~0.6–1.0% — maintains toughness despite high stiffness
Notched Izod Impact: ~55–70 J/m — strong resistance to impact and fatigue
PPA-LCF40 provides outstanding strength and dimensional precision, making it suitable for components subjected to continuous stress, vibration, and dynamic mechanical loads.
Thermal Resistance
Heat Deflection Temperature (HDT): ~280–290 °C
Continuous Use Temperature: Up to 250 °C
Excellent thermal endurance, capable of maintaining structural integrity and stiffness in elevated temperature conditions such as powertrains, battery enclosures, and electric drive systems.
Environmental & Chemical Durability
Moisture Absorption: ~0.04–0.07% — extremely low, ensuring high dimensional accuracy
Chemical Resistance: Excellent — resistant to fuels, oils, acids, bases, coolants, and industrial chemicals
PPA-LCF40 performs reliably in corrosive, humid, and thermally cycling environments with minimal mechanical degradation over time.
Processing & Manufacturing
Molding Method: Injection molding (long fiber feedstock or direct LFT)
Surface Finish: Matte to coarse, fiber visibility common
Tooling Requirements: Requires hardened, wear resistant steel molds to handle fiber abrasion
Processing Notes: Flowability decreases with higher fiber content — advanced mold design and process optimization are essential to ensure fiber alignment and part strength.
Despite higher molding complexity, PPA-LCF40 delivers unmatched performance when processed correctly.
Target Applications
Automotive & Mobility
Applications: Structural crossbeams, engine cradles, battery enclosures, drive system mounts
Metal replacement in weight sensitive and high load structural parts exposed to vibration, temperature, and chemical stress.
Electronics & Electrical
Applications: High voltage housings, inverter covers, structural EMI/RFI shields
Maintains rigidity and electrical stability under thermal cycling and mechanical shock.
Industrial Equipment
Applications: Structural frames, robotic joints, load bearing pump components
Combines fatigue resistance and stiffness in environments with aggressive mechanical and chemical exposure.
Performance Summary Table
| Property | Value / Description |
|---|---|
| Carbon Fiber Content | 40% (Long Carbon Fiber Reinforced) |
| Tensile Strength | ~180–195 MPa |
| Flexural Modulus | ~15–17 GPa |
| Elongation at Break | ~0.6–1.0% |
| Notched Izod Impact | ~55–70 J/m |
| Heat Deflection Temp. | ~280–290 °C |
| Continuous Use Temp. | Up to 250 °C |
| Moisture Absorption | ~0.04–0.07% — ultra low, for tight dimensional control |
| Chemical Resistance | Excellent — fuels, oils, acids, bases, solvents |
| Wear Resistance | Very high — suitable for friction and structural loads |
| Processing Method | Injection molding with long fiber compatibility |
| Surface Finish | Matte/textured — visible fibers typical |
| Dimensional Stability | Outstanding — low creep, minimal thermal expansion |
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Strength between PPA and PPA-CF
PPA-CF (carbon fiber reinforced) offers significantly higher mechanical strength and rigidity compared to standard PPA. The addition of carbon fiber enhances tensile strength, flexural strength, and wear resistance, making PPA-CF more suitable for heavy loads and extreme environments. While standard PPA is suitable for medium-load and conventional applications, PPA-CF provides superior performance for more demanding industrial conditions.
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Frequently Asked Questions
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What are CF Reinforced Thermoplastic Composites?
CF Reinforced Thermoplastic Composites are materials where carbon fibers are incorporated into a thermoplastic matrix. They combine the strength and stiffness of carbon fibers with the processability and recyclability of thermoplastics. For instance, they are used in automotive parts like bumper beams.
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What are the benefits of CF Reinforced Thermoplastic Composites over traditional composites?
The key benefits include faster production cycles, easier recyclability, and better impact resistance. They also offer design flexibility. An example is in the manufacturing of consumer electronics casings where complex shapes can be achieved more easily.
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How are CF Reinforced Thermoplastic Composites processed?
Common processing methods include injection molding, extrusion, and compression molding. Injection molding is widely used for mass production. For example, in the production of small components for the medical industry.
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What industries use CF Reinforced Thermoplastic Composites?
They are utilized in aerospace, automotive, medical, and sports equipment industries. In aerospace, they can be found in interior components. In the medical field, they might be used in prosthetics.
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How does the carbon fiber content affect the properties of the composites?
Higher carbon fiber content generally leads to increased strength and stiffness but may reduce ductility. A moderate content is often balanced for specific applications. For example, a higher content might be preferred in structural parts of a race car.
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What are the challenges in using CF Reinforced Thermoplastic Composites?
Challenges include higher material costs, complex processing equipment requirements, and ensuring uniform fiber dispersion. Issues with adhesion between the fibers and the matrix can also arise. An example is in achieving consistent quality in large-scale production.
