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Comparison between Polyether- and Polyester-based PU Products

Polyether based material 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


Polyester based material has following characteristics:


1.      Excellent Oil resistance

2.      Excellent Abrasion resistance

3.      Burst Pressure Resistance: About the same as Ether based tubing

4.      Polyester-based polyurethane tubing is generally stronger and enjoys cost advantage over Polyether based PU tubing.

5.      Not recommended for use in high humidity or exposure to water, as volume swell and reduction of properties may result