Acetal Polyoxymethylene – POM

Polymer Type

Thermoplastic

Advantages

Highly crystalline, more creep resistant than Nylon.  Excellent abrasion resistance. Good resistance to solvents (except phenols).Low smoke emission.  High gloss surfaces.  Lower moisture absorption than Nylons.

Disadvantages

Poor resistance to acids/alkalies (particularly homoploymer).  Burns easily, (not available with flame retardants).Limited processing temperature range.  Poor UV resistance.  High mould shrinkage.

Applications

Gears, bearings, conveyor belt tracks, plumbing fittings, fan blades, pen cases, lock mechanisms, aerosol valves.  Spring levers, nuts, screws, video/audio cassette components, disposable lighters, switches.

Acetal Polyoxymethylen Copolymer – POM 2% silicone lubricated

Polymer Type

Thermoplastic

Advantages

Extremely low coefficient of friction. Good rigidity, creep resistance and toughness. Excellent resistance to most solvents.

Disadvantages

Those normally associated with unmodified copolymer, i.e. high mould shrinkage, poor resistance to UV radiation, acids and bases.

Typical Properties

Applications

Gears, bearings, sprockets, conveyor belt components, drive chains, bearing bushes, snap fit components, pulley wheels and spring studs.