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Technical Specification

Natural

Common Name: Natural
Chemical Name: Isoprene Rubber, Natural
Abbreviation: NR
Temperature Range: Min -50°C Max +70°C [+100°C intermittently]
Strengths: High tensile strength with good resistance to abrasion, tear and fatigue. Electrical properties and low temperature behaviour are excellent.
Weaknesses: Susceptible to attack by ozone. Poor resistance to mineral and petroleum based oils.

Neoprene

Common Name: Neoprene
Chemical Name: Chloroprene Rubber
Abbreviation: CR
Temperature Range: Min -40°C Max +100°C [+125°C intermittently]
Strengths: Good ageing, abrasion and weathering resistance with medium resistance to petroleum based oils. Lend themselves to low flammability applications.
Weaknesses: Poor electrical properties though adequate for sheathing. Not resistant to ester lubricants.

Silicone

Common Name: Silicone
Chemical Name: Silicone Rubber
Abbreviation: Q
Temperature Range: Min -45°C Max +200°C [+250°C intermittently]
Strengths: Outstanding ozone and good weathering resistance. Good electrical properties. All Properties are fairly constant over the temperature range.
Weaknesses: Poor resistance to petroleum-based fluids.

PVC

Common Name: PVC
Chemical Name: Polyvinyl Chloride
Abbreviation: PVC
Temperature Range: Min -20°C Max +100°C
Strengths: Low permeability and high tensile strength. Good all weathering properties.
Weaknesses: Only fair mechanical properties.

EPDM

Common Name: EPDM
Chemical Name: Ethylene Propylene
Abbreviation: EPDM
Temperature Range: Min -50°C Max +125°C
Strengths: Outstanding resistance to ozone, light ageing, oxidative and heat ageing and many inorganic and organic chemicals. Good low temperature behaviour.
Weaknesses: Poor resistance to petroleum·based fluids.

Nitrile

Common Name: Nitrile
Chemical Name: Acrylonitrile-Butadiene Rubber
Abbreviation: NBR
Temperature Range: Min -40°C Max +100°C [+150°C intermittently]
Strengths: Excellent fuel and oil resistance.
Weaknesses: Poor ozone, and low temperature performance but these can be both amended by the addition of plasticizers.

Viton®

Common Name: Viton®
Chemical Name: Fluorocarbon
Abbreviation: FPM
Temperature Range: Min -30°C Max +200°C [+275°C intermittently]
Strengths: Excellent resistance to heat, oil, ozone, weather and chemical attack with very good mechanical properties retained after long term ageing and at high temperatures.
Weaknesses: Only fair low temperature performance.