What Is The Different Between Polyester TPU And Polyether TPU-3

Urethanes have excellent abrasion resistance. They have far greater wear resistance than metals, plastics, and other rubbers. Abrasion resistance comes in two forms: sliding and impingement. Impingement refers to particles or things striking the urethane surface at a high angle, whereas sliding refers to scraping and rubbing abrasion.
Polyester urethane has excellent resistance to sliding abrasion making it ideal for CIPP, dock seals, scraper blades.
Polyether urethanes offer outstanding impingement abrasion resistance making it an excellent choice for sandblast curtains, bumpers, and rafts.
Chemical, Grease, Fuel, Solvent, Water and Chemical Resistance
If the TPU is in a high-humidity environment or is submerged or constantly exposed to water, polyether urethane is an excellent choice because of the hydrolytic stability. Polyether TPU also has good microorganism resistance. Whereas if the product comes in contact with oils, or fuels solvents, polyester urethane provides excellent resistance from harsh chemicals making it ideal for CIPP liners and storage tanks.
High and Low Temperature Resistance
Polyesters withstand high temperatures longer and are more resistant to heat aging.
Polyethers are much less susceptible to dynamic heat build-up. That is why they are the choice for high-speed rollers where the rapid flexing creates heat.
Polyether urethanes are less affected by cold temperatures compared to Polyester TPUs.
Mechanical Properties
Polyester-based films will have higher tensile strength and higher cut and tear resistance when compared against polyether films.
Polyester is the choice for shock absorption and is used widely in vibration dampening applications.
Polyether provides much higher rebound and therefore is the choice for skate wheels and high-speed rollers.
From a price point, polyethers are more expensive than polyester as the polyol that form the soft segment of a polyether is generally priced higher on raw materials and is more complicated and difficult to produce, requiring advanced equipment. Also, being better in hydrolytic and low temperature resistance, the demand is much higher for polyether-based TPU.