Aromatic Polyethers function very well in applications requiring direct contact with human skin. Offering a high resistance to skin oils, Polyethers have high Moisture Vapor Transmission Rates (MVTR), maintain their flexibility in low-temperature environments, and can withstand prolonged exposure to high-humidity environments without degradation. Polyethers weld easily has a softer non-plastic feel, and will not support fungal growth. Very often Polyether Films are used in multi-layer laminations as an adhesive layer or a barrier layer.
Polyether-based TPU has following characteristics:
1. Fungus Resistance
2. Low-temperature flexibility
3. Excellent hydrolytic stability
4. Resistance to Weak Acids/Bases
5. Recommended for applications undergoing medium to high stress
6. Burst Pressure Resistance: About the same as Ester based tubing
7. Polyether-based polyurethanes remain stable in water as warm as 50℃ (122℉) for long periods. Not recommended for running water over 70℃ (158℉). Water absorption is a very low 0.3% to 1% by weight, and volume swell is negligible.
8. Demonstrate better durability than Ester material based products (around 5 years, versus the 3 years shelf life of Polyester based products, i.e. tubing)
9. Generally more expensive than Polyester based material
10. Moisture resistance for pneumatic application