The characteristics of plastic bearings encompass a wide spectrum. Materials like POM and PA offer excellent mechanical strength and wear resistance, suitable for high-temperature environments (approximately -55°C to 100°C). PP, HDPE, and UPE are suitable for most acidic and alkaline environments, providing self-lubricating effects without oil. PTFE and PVDF exhibit optimal resistance to chemicals. PEEK and PI represent new-age engineering plastics; PEEK sustains long-term usage temperatures up to 260°C, while PI goes even higher to 300°C. Both possess outstanding corrosion resistance, allowing operation in more complex acidic and alkaline environments.
Additionally, PEEK boasts extremely high temperature stability, along with high rigidity and hardness. PTFE similarly offers chemical corrosion resistance, low friction coefficients, and excellent electrical insulation properties. HDPE has good electrical insulation and is easy to weld. The working temperature of HDPE ranges from -50°C to +90°C. PVDF can function within temperatures ranging from -60°C to +150°C.
Plastic bearings have diverse applications:
Polymer | Chemical Name | Polymer | Chemical Name |
PTFE | Polytetrafluoroethylene | PVDF | Polyvinylidene difluoride |
PEEK | Polyetheretherketone | PI | Polyimide |
POM | Polyoxymethylene | PE | Polyethylene |
HDPE | High-density polyethylene | HMW-PE | High-molecular-weight polyethylene |
UHMW-PE | Ultra-high-molecular-weight polyethylene | PPS | Polyphenylene sulfide |
PA66 | Nylon 66 | PA6 | Nylon 6 |
PA46 | Nylon 46 | PP | Polypropylene |
PBT | Polybutylene terephthalate | ABS | Acrylonitrile Butadiene Styrene |