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Materials
NR - Natural Rubber
EPDM - Ethylene Propylene Diene Monomer
CR Neoprene - Polychloroprene Rubber
NBR Nitrile - Acrylonitrilebutadiene Rubber
PVC
TPR - Thermoplastic Rubber
SI - Silicone
SBR - Styrene Butadiene Rubber
FPM - Viton
PU - Polyurethane
NR - Natural Rubber
A material with excellent physical properties, natural rubber has good abrasion and low temperature resistance, however it is not resistant to oils, fuels or UV exposure.

Temperature range: -60°C to +75°C
Hardness Shore A: 50°C to 80°C

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EPDM - Ethylene Propylene Diene Monomer
This is a material with good physical properties that include excellent resistance to UV, many chemicals, steam and ageing. It is not, however, compatible with oils or fuels.

Temperature range: -50°C to +130°C
Hardness Shore A: 50°C to 80°C

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CR Neoprene - Polychloroprene Rubber
Chloroprene rubber is fairly resilient when in contact with oils and chemicals, but has exceptional resistance to UV. This material also has excellent flame retardation qualities.

Temperature range: -40°C to +95°C
Hardness Shore A: 50°C to 80°C

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NBR Nitrile - Acrylonitrilebutadiene Rubber
A material with exceptional resistance to oils and good resistance to fuels, but is not suitable for applications with prolonged exposure to UV.

Temperature range: -20°C to +100°C
Hardness Shore A: 50°C to 80°C

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PVC
PVC is an excellent material for use when chemical and UV resilience is required, It also has good physical characteristics including resistance to corrosion.

Temperature range: -20°C to +40°C

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TPR - Thermoplastic Rubber
This material has excellent UV and temperature properties, and has reasonable resistance to oils and fuels.

Temperature range: -20°C to +60°C

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SI - Silicone
This material has little resistance to fuels, however has excellent physical properties including temperature, UV, oils and chemical resistance.

Temperature range: -60°C to +200°C
Hardness Shore A: 30°C to 70°C

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SBR - Styrene Butadiene Rubber
SBR has good physical characteristics including resistance to wear and abrasion, but is not recommended where contact with oils, fuel or high levels of UV are likely.

Temperature range: -55°C to +85°C
Hardness Shore A: 60°C to 70°C

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FPM - Viton
FPM has excellent all round properties including resistance to high temperature, chemicals, oils and fuels.

Temperature range: -20°C to +200°C
Hardness Shore A: 70°C to 80°C

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PU - Polyurethane
Polyurethane is a material with high levels of flexibility and elasticity. With good resistance to abrasion, it is also effective when in contact with high temperature and oils.

Temperature range: -30°C to +85°C

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Unit 19, The Cam Centre, Wilbury Way
Hitchin, Hertfordshire, SG4 0TW
Tel: 01462 452487 Fax: 01462 452249
Email: sales@kopak-walker.co.uk
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