Acetal Polyoxymethylene Homopolymer - POM UV Stabilised

Produced in both copolymer and homopolymer forms which do not  differ greatly, both polymers are hard, tough, and stiff with good appearance (can provide high surface gloss) and excellent abrasion resistance.

Generally highly opaque and crystalline, their natural color is white but they are frequently used colored. They have poor resistance to UV. and generally to alkalis and acids.

Compared to copolymer, the homopolymer has slightly better mechanical properties, but somewhat worse thermo-oxidative stability. The copolymer alone is appropriate for continuous use with hot water.

Polymer Type



The excellent mechanical properties of a homopolymer with improved weather ability and longer lifetime for external components.


In the case of carbon black modification best results are obtained with 1.5% of well-dispersed fine particles. However the finer the particle, the poorer the heat stability. Also prone to high mould shrinkage and attack by acids and bases, as with unmodified homopolymer.


Sporting equipment, eg. Ski boot bindings, tennis racquet handles, mast supports and frame connectors for windsurfing boards. Toys.

Other applications include snap fittings, bearings, gears and many other engineering components, jug kettles, appliance casings, and plumbing fittings.

Homopolymer can be used in ssport equipment such as tennis racquet handles Image Credit: Africa Studio/ShutterStock

Homopolymer can be used in ssport equipment such as tennis racquet handles Image Credit: Africa Studio/ShutterStock

Typical Properties

Property Value
Density (g/cm3) 1.42
Surface Hardness RM94
Tensile Strength (MPa) 64
Flexural Modulus (GPa) 2.78
Notched Izod (kJ/m) 0.072
Linear Expansion (/°C x 10-5) 12
Elongation at Break (%) 35
Strain at Yield (%) 10
Max. Operating Temp. (°C) 85
Water Absorption (%) 0.25
Oxygen Index (%) 15
Flammability UL94 HB
Volume Resistivity (log 14
Dielectric Strength (MV/m) 18
Dissipation Factor 1 kHz 0.003
Dielectric Constant 1 kHz 3.8
HDT @ 0.45 MPa (°C) 165
HDT @ 1.80 MPa (°C) 130
Material. Drying hrs @ (°C) 2 @ 90
Melting Temp. Range (°C) 200 - 220
Mould Shrinkage (%) 2
Mould Temp. Range (°C) 80 - 100

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

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