Full-Dimensional Aging Failure Analysis and Long-Term Protection Scheme for Plastic Fasteners
Full-Dimensional Aging Failure Analysis and Long-Term Protection Scheme for Plastic Fasteners
Plastic fasteners are widely used in electrical, new energy and electronic equipment due to insulation, non-magnetic and lightweight advantages. However, plastic materials are prone to aging, embrittlement and deformation under UV, high temperature and humid conditions. Scientific protection management ensures long-term structural stability and insulation performance.
1. Aging Characteristics of Different Plastic Materials
Nylon has good toughness but is sensitive to humidity and UV. PC features stable size and high temperature resistance but may hydrolyze in humid heat environment. PP has excellent acid and alkali resistance but poor weather resistance. Glass fiber reinforced nylon improves strength but reduces toughness.
2. Four Major Environmental Aging Mechanisms
UV radiation breaks molecular chains and causes brittleness. High temperature accelerates thermal oxidation and hardening. Humid environment leads to hydrolysis and dimensional change. Long-term vibration causes preload attenuation and loosening failure.
3. Full-Process Long-Term Protection Strategy
Select modified materials according to working environment. Adopt sealed and constant-temperature storage. Standardize low-torque assembly operation. Implement periodic inspection and replacement for outdoor and high-temperature equipment to avoid aging failure risks.