Plastic Fastener Material Selection Guide: PA66, PP, PEEK, PTFE Performance Comparison & Applications
Plastic Fastener Material Selection Guide: PA66, PP, PEEK, PTFE Performance Comparison & Applications
Plastic fastener material directly determines performance and suitability; this guide compares mainstream material properties to help engineers select accurately and avoid assembly failures.
1. Mainstream Material Performance Comparison
PA66 (Nylon): Best overall performance, high strength, toughness and wear resistance, temp range -40℃~120℃, top choice for general electronics and automotive;
PP (Polypropylene): Chemical and moisture resistant, temp range -20℃~100℃, ideal for humid and acidic environments;
PEEK: High temp resistance up to 260℃, high strength and low creep, suitable for automotive electronics, medical and PV high-temperature scenarios;
PTFE: Extremely low friction, strong corrosion resistance and insulation, perfect for sealing, lubrication and extreme chemical environments.
2. Selection by Application Scenario
Electronic PCB: PA66 insulation screws to prevent short circuits;
PV junction box: PP/PA66 weather-resistant nuts for UV protection;
Automotive engine bay: PEEK high-temperature screws;
Medical devices: PEEK/PTFE biocompatible and non-magnetic fasteners.
3. Key Selection Notes
1. Temperature resistance: Ensure material temp range exceeds working temperature;
2. Insulation: Prioritize PA66/PP for electronics to avoid conductivity;
3. Strength: Choose PA66/PEEK for load-bearing parts to prevent brittleness;
4. Corrosion: Select PP/PTFE for acidic/alkaline environments to extend lifespan.
4. Troubleshooting Common Issues
Brittleness: Insufficient temp resistance or overloading, switch to PEEK or glass-filled PA66;
Thread stripping: Excessive torque or mismatched hole size, adjust torque or optimize hole diameter;
Corrosion: Material mismatch, replace with PP/PTFE corrosion-resistant materials.