Polyurethane

Polyurethane Elastomers are extremely versatile materials and this has been the key to their widespread applications. Polyurethane has a unique design and construction combining many of the advantages of rigid plastics, metals and ceramics with the extensibility of rubber.

Polyurethane Elastomers are extremely versatile materials and this has been the key to their widespread applications. This flexible engineering material is available in Polyurethane Sheet, Rod and Custom Cast Products. Polyurethane has a unique design and construction combining many of the advantages of rigid plastics, metals and ceramics with the extensibility of rubber. This material is utilized in various industries including forestry and defence.

Dotmar has a modern Polyurethane Sheet casting facility with the ability to cast polyurethane parts to a near net shape and then post machine according to your requirements.
There are many different types of Polyurethanes Sheet, Polyurethane Rod and Polyurethane Custom Cast Component Materials. The four basic types are;
  • POLYETHER / TDI
  • POLYETHER / MDI
  • POLYESTER / TDI
  • POLYESTER / MDI
As a general guide to Polyurethane:
Polyethers are recommended for applications were parts undergo dynamic stress. ie. They incur lower heat build-up. They also have advantages in resilience, low temperature performance and resistance to water attack (hydrolysis). Polyethers also have lower viscosity and specific gravity. Polyester based urethanes have superior cut, tear, abrasion, oil and solvent resistance. MDI based products have lower isocyanate odour than similar TDI types and have superior hydrolysis resistance and higher resilience. TDI based products are less sensitive to moisture, have shorter demould times and lower cure temperature requirements compared to MDI types.

Key Benefits:
  • Abrasion resistance
  • Toughness – Tensile strength
  • High load bearing ability
  • High tear resistance
  • Mechanical properties
  • Resistance to water, oil, grease
  • Electrical properties
  • Corrosion resistance
  • Colour range
  • Cost effectiveness

Colours: Dependent on hardness

Rod Length: 300mm

 

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