Polyester Polyurethane Tubing: Choose the right one for performance, from tools to automation
In industrial applications, polyurethane (PU) tubing is highly valued for its exceptional abrasion resistance, flexibility, and chemical resistance. However, not all polyurethane materials are the same—polyester-based and polyether-based are two common types, each suited for different scenarios. This article provides a detailed comparison to help you make an informed decision based on your specific requirements.
Chemical Structure
- Polyester PU Tubing: Made from polyester polyols and isocyanate, featuring ester groups (-COO-) in its molecular chain.
- Polyether PU Tubing: Produced from polyether polyols and isocyanate, containing ether linkages (-O-) in its molecular structure.
Mechanical Properties
- Polyester PolyurethaneTubing: Offers higher mechanical strength, superior wear resistance, and better pressure/tensile resistance, making it ideal for high-abrasion environments.
- Polyether Polyurethane Tubing: Slightly lower in mechanical strength but provides greater flexibility, maintaining excellent elasticity even in low-temperature conditions.
Hydrolysis Resistance
- Polyester PU Tubing: Poor hydrolysis resistance; prolonged exposure to moisture or high humidity can cause degradation, leading to cracking and failure.
- Polyether PU Tubing: Excellent hydrolysis resistance and microbial resistance, making it suitable for damp or high-humidity environments with a longer service life.
Working Temperature Range
- Polyester PolyurethaneTubing: -20°C to 70°C (-4°F to 158°F)
- Polyether Polyurethane Tubing: -40°C to 70°C (-40°F to 158°F)
Water Absorption Rate
- Polyester PU Tubing: Higher water absorption (typically 1%–2%).
- Polyether PU Tubing: Lower water absorption (typically 0.3%–1%).
Service Life
- Polyester PU Tubing: Performs well in dry conditions but degrades faster in humid or high-temperature environments, lasting about 1–3 years.
Polyether PU Tubing: Outstanding hydrolysis resistance ensures a longer lifespan, typically 5+ years.
Applications
- Polyester PU Tubing: Commonly used in pneumatic systems, industrial automation, and other high-durability applications requiring strength.
- Polyether PU Tubing: Ideal for medical devices, food & beverage processing, automotive interiors, robotics, pneumatic equipment, and automation where flexibility and moisture resistance are critical.
Conclusion
Both polyether and polyester polyurethane tubing have distinct advantages. Your choice should depend on your specific needs:
Choose polyester PU tubing if your application requires high abrasion resistance, cost-effectiveness, and operates in dry conditions.
Choose polyether PU tubing for superior hydrolysis resistance, low-temperature flexibility, and long-term durability.
Regardless of the material chosen, proper use and maintenance can extend its service life, bringing you greater economic benefits. If you need further guidance, contact our expert team for personalized solutions!
