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 ,rpolyurethane od & polyurethane custom cast componet 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)