Polyurethane Plastics Products from Dotmar EPP

• Polyether/ TDI 
• Polyether / MDI 
• Polyester / TDI 
• Polyester / MDI

Polyurethane 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
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)

• Automotive - Grommets, bearings, bushes, flexible couplings.
• Building and Constructions - Moulds for concrete, gate seals, concrete pump ports.
• Electrical - Encapsulation, insulation, potting, cable joining.
• Engineered - Gears, sprockets, wire guides, rail draft gear, stripper plates, press brake pads, textile yarn guides, cutting boards, business machine belts, couplings
• Food - Chute lining, grain buckets
• Mining - Bucket liners, conveyor rollers, scraper blades, flotation cell impellers, pump linings, grading screens, lined pipes, cross-over pads
• Oil, Chemical and Marine - Bushings, bearings, hydro clones, buoys, pipeline pigs and scrapers, fenders, valve seats
• Rollers - Board rollers, nip rollers, metal forming, printing, conveyor, can coating, paper mill
• Seals and Gaskets - Pneumatic and oil seals, diaphragms