Ether-based polyurethane flexible pneumatic tubing comprises both plastic and rubber-based materials, providing significant advantages in a wide range of applications. Compared to ester-based polyurethane products, polyurethane hose delivers high abrasion and tear resistance, high tensile and elongation values, low compression set, and uncompromised value.
As an exclusive ether-based polyurethane pneumatic tubing provider, UPC offers PUR flexible hose in various standard and metric sizes, colors, temperature ratings, and durometer levels, including 98, 95, 90, 85, and 70 shore A.
Flexible Polyurethane Tubing PropertiesPolyurethane is produced in a polymerisation reaction between diols or polyols and diisocyanates or polyisocyanates. The result is a molecule bonded by urethane (COONH) linkages. The following table provides a breakdown of some of the most common properties of polyurethane:
|Density||0.05 - 1.7 g/cm3|
|Elongation at Break||2-950%|
|Hardness||45-98 Shore A
51-85 Shore D
|Thermal Conductivity||0.14 - 0.5 W/m.K|
|Coefficient of Thermal Expansion||100-200 10-6 /ºC|
|Elastic Modulus||0.03 - 1.88 GPa|
|Flexural Modulus||0.029 - 18 GPa|
|Max. Service Temperature||80 - 90°C (120-135°C short-term)|
|Min. Service Temperature||~ -60°C|
|Dielectric Strength||17-25 kV/mm|
Ester- Versus Ether-Based Polyurethane Hose TubingPolyurethane hose is comprised of two separate classes, esther-based and ether-based tubing. Both types of tubing display their unique chemical properties that cause similar reactions of differing qualities. Ester-based polyurethane tubing is inclined to degradation in moisture-rich environments; conversely, ether-based PUR hose products do not degrade under heavy moisture.
PUR Flexible Tubing AdvantagesPolyurethane hose products are naturally clear and strongly resist chemicals, water, fuel, oil, and fungus. Flexible polyurethane pneumatic tubing provides a rubberlike feel without any plasticizers to leach or migrate, ensuring a long, stable service life. Additional PUR pneumatic tubing advantages include:
- Incredibly flexible with an excellent memory
- Low gas permeability, extractables, and compression set
- Resistant to chemicals, water, fuel, oil, and fungus
- Kink and abrasion-resistant
- Tensile strength twice that of vinyl tubing