Material Selection and Application Guide for Plastic Fasteners
Material Selection and Application Guide for Plastic Fasteners
There are various materials for plastic fasteners. Different engineering plastics differ greatly in temperature resistance, strength and corrosion resistance. Improper selection will cause fracture, deformation and accelerated aging. This article summarizes material performance and usage rules for reference.
1. Features and Application of Main Materials
1. Nylon PA66: The most common material with good toughness, wear resistance and chemical resistance. Working temperature: -20℃~100℃. Widely used in home appliances and electronic products. Glass fiber reinforced nylon has higher strength for automotive interior parts.
2. POM: High rigidity and dimensional stability, suitable for precision clips and small gears, working temperature below 100℃, commonly used in toys and office equipment.
3. PP: Excellent water and chemical resistance, lightweight, working temperature ≤80℃, ideal for bathroom facilities, swimming pool parts and disposable medical components.
4. PC: High transparency and impact resistance, suitable for transparent equipment shells, not recommended for strong corrosive environments.
5. PEEK: High-end high-temperature material, long-term working temperature up to 260℃, with top-level strength and anti-aging performance, applied in semiconductor, chemical and aerospace fields.
2. General Usage Rules and Taboos
The tensile strength of plastic fasteners is lower than metal parts. Do not use them for heavy-load or strong vibration scenarios. Avoid excessive mounting torque to prevent thread cracking. Ordinary plastics have poor UV resistance, so select anti-aging modified products for long-term outdoor use.
3. Environmental and Assembly Tips
Choose products that comply with RoHS, REACH and food contact standards for medical, food and export products. Do not use lubricating oil during assembly, as oil will cause expansion and deformation of most plastic materials.