Polyurethane – elastomer
Austane®, Urethane®, Lurathane®
Typically colour determines the hardness however uncoloured PUR typically is creamy in colour. This is also highly dependent on the isocyonate makeup of the urethane; either TDI, MDI, NDI or PPDI.
Typical colours range from black, red, greens, yellows and blues to name a few. Colours will determine a hardness grade with most manufacturers.
Rod, Tube, Sheet and special purpose castings
Drive rollers. Drive and idler wheels. Sheave linings. Piston cups and seals. Gaskets. Vibration bushings. Vibration isolation. Wear pads. Scraper Blades. Pump liners. Impellors. Conveyor rollers.
Can be difficult to machine. Hardnesses above 80 Duro are more readily machined; below this hardness parts are usually cast to shape or rough machined. Closer tolerances are achieved by grinding.
Polyester base. Urethanes mostly for dynamic applications. Polyether base Urethanes for moist environments. Hardness range from 40 Duro’A’ to 75 Duro ‘D’. Cellular foam.
Can be cast with low cost moulds. Good abrasion resistance. Good tear resistance. High impact resistance. Polyurethane is resilient like rubber but the abrasion resistance and load-bearing capacity is better than rubber resulting in longer life.
Resists water, oils, chemicals and solvents
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