Overview
PET (Polyethylene Terephthalate) is a high-performance engineering thermoplastic known for its excellent dimensional stability, high mechanical strength and low moisture absorption. It offers a low coefficient of friction and outstanding wear resistance, making it ideal for precision parts that operate in wet or chemically aggressive environments. PET also maintains its physical properties over time, even under load and offers better acid resistance than many other plastics such as Nylon and Acetal. It is commonly used in applications where dimensional consistency; surface quality and clean operation are important.
Key Features
- High tensile and flexural strength
- Excellent dimensional stability
- Very low moisture absorption
- Low coefficient of friction
- Good wear and abrasion resistance
- High resistance to acids and chemicals
- Superior surface finish quality
- Good machinability
- Food contact approved (FDA & EU compliant)
Applications
- Precision gears and bearings
- Rollers and guides
- Food processing equipment components
- Valve components and pump housings
- Sliding and wear strips
- Electrical insulation parts
Weaknesses
- Brittle compared to Nylon in impact applications
- Limited resistance to strong alkalis
- Not suitable for high-temperature continuous use (above 110°C)
