PUR

PUR – Polyurethane

PUR

Polyurethanes comprise a large number of plastics, with diverse properties. The material presented here is an ester-based plastic with qualities similar to those of rubber. It is flexible and stretchy. The group of elastic PUR plastics contains materials with a wide range of hardness values. The standard range is Shore 65A–95A.

Physical properties
  Value Unit Test method
Specific gravity 1.24 g/cm3 DIN EN ISO 1183
Average molecular mass N/A
Water absorption, 24/96 h (23 °C) N/A
Weather-resistance moderate
Combustibility HB UL 94 DIN EN ISO 527-2
Food safety yes
Mechanical properties
  Value Unit Test method
Modulus of elasticity N/A
Tensile strength 40 MPa DIN EN ISO 527-2
Elongation at break N/A
Tensile strength at break 500 % DIN EN ISO 527-2
Flexural modulus N/A
Flexural strength N/A
Compressive modulus N/A
Compressive strength, 1%/2% N/A
Impact strength (Charpy) N/A
Notch impact strength (Charpy) N/A
Notch impact strength (Izod) kJ/m2 DIN EN ISO 180/2A
Toughness (ball pressure) N/A
Toughness (Shore D) 90 ShA +/- 5 Sh D DIN EN ISO 868
Wear-resistance N/A
Coefficient of friction (against steel) N/A
Thermal properties
  Value Unit Test method
Glass-transition temperature N/A
Melting point N/A
Operating temperature (instantaneous) +100 °C
Operating temperature (continuous) 70 °C
Operating temperature (minimum) -40 °C
Thermal expansion coefficient, 23–60 °C N/A
Thermal expansion coefficient, 23–100 °C N/A
Specific heat capacity N/A
Thermal conductivity N/A
Electrical properties
  Value Unit Test method
Surface resistivity N/A
Resistivity N/A
Dielectric strength N/A
CTI value N/A
Optical properties
  Value Unit Test method
Light transmittance N/A
Refractive index N/A
Optical errors N/A
Abrasion-resistance, 100 rotations with 500 g N/A

Additional downloads

Delivery selection sheets, bars
Specific gravity 1.24 g/cm3
Service temperature -40 … 70 °C
Price category €€ (€8–25/kg)

Special properties

  • good resistance to wear
  • elasticity
  • high tensile strength and elongation at break
  • high coefficient of friction
  • good shock- and impact-resistance
  • good resistance to many oils, greases, and fuels

Applications

bushings, silo linings, doctor blades, snowploughs, clutch components, skateboard wheels and applications in which absorbing shocks is required

Standard colours

natural

Special colours

brown

Premade pieces

enquire

Commonly known brands

Elastopal, Etrane N, Vulkollan