Polyurethane Sheeting, Polyurethane Rod & Casting


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 & 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.

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 & polyurethane custom cast component materials. The four basic types are;

  • POLYETHER / TDI
  • POLYETHER / MDI
  • POLYESTER / TDI
  • POLYESTER / MDI

As a general guide:

  • 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.

Properties of Polyurethane Sheet, Rod & Castings: Polyurethane can be adapted to comprise a wide range of unique properties, which is a key factor of its versatility.

  • 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 (when long service life of PU parts are taken into account)
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