PA66+GF15 Applications in Automotive Components

2026-03-26　

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PA66+GF15 (15% glass fiber reinforced polyamide 66) is a balanced-performance engineering plastic, widely used in automotive components that require moderate rigidity, good heat resistance, dimensional stability, and surface quality.

I. Core Performance Advantages

Heat resistance: HDT (1.8MPa) ≈ 200°C, stable in long-term 120–150°C environments
Rigidity & strength: Higher than unreinforced PA66, with good impact resistance
Dimensional stability: Low molding shrinkage (≈0.5–0.8%), ensuring assembly precision
Surface quality: Less fiber exposure than high-GF grades, suitable for visible exterior/interior parts
Chemical resistance: Resistant to oil, coolant, salt spray, and automotive fluids
Processability: Good flowability, easy to mold complex thin-walled structures

II. Typical Automotive Applications

1. Engine Compartment Components

Engine cover / cylinder head cover trim: Good heat resistance and surface finish
Oil pan gaskets / valve cover seals: Sealing performance and chemical resistance
Sensor housings (temperature/pressure sensors): Dimensional stability and insulation
Wiring harness connectors / terminal blocks: Electrical insulation and heat resistance

2. Interior Components

Door handle bases / lock mechanism housings: Rigidity and wear resistance
Instrument panel (IP) brackets / air vent frames: Dimensional stability and low warpage
Seat adjustment levers / gear shift knobs: Good surface appearance and impact resistance
Steering wheel core components: Heat resistance and fatigue resistance

3. Exterior & Body Components

Side mirror housings / mirror bases: Weather resistance and dimensional stability
Door module brackets / window regulator components: Moderate rigidity and vibration resistance
Fuel filler door hinges / latches: Corrosion resistance and fatigue resistance

4. Thermal & Fluid Management Systems

Coolant reservoir housings / expansion tank brackets: Heat resistance and chemical resistance
HVAC duct connectors / valve housings: Dimensional stability and heat aging resistance
Air intake system resonators / duct clamps: Good flowability and surface quality

5. Electrical & Electronic Components

Battery module housings / fuse box covers: Insulation and heat resistance
Charging port housings (low-voltage): Dimensional stability and impact resistance
ECU (Engine Control Unit) housings: Rigidity and electromagnetic shielding compatibility

III. Key Selection Considerations

Balance of rigidity and toughness: Better impact resistance than PA66+GF30, suitable for parts requiring both strength and toughness
Surface finish: Preferred for visible components due to minimal fiber exposure
Cost efficiency: Lower material cost than high-GF grades while meeting performance requirements
Moisture absorption: PA66 is hygroscopic; pre-drying is required before molding to avoid defects

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