Rubber Mouldings Materials

Rubber Mouldings Materials used by Techmould

Typical Material Chemical Compatability

Natural Rubber E.P.D.M. Neoprene Nitrile HNBR Flurucarbon E.G. Viton ® Silicone Flurosilicone
Air or Oxygen Fair Very Good Good Good Very Good

Excellent

Very Good Very Good
Dilute Acids or Alkalis Very Good Very Good Very Good Good Good Very Good Fair Fair
Commercial Petrols NR NR Fair Good Very Good Very Good NR Fair
Fuel and Diesel Oils NR NR Fair Good Very Good Very Good NR Fair
Mineral Lubricating Oil NR NR Very Good Very Good Very Good Very Good Fair Very Good
Synthetic Lubricating Oil NR NR NR Fair Very Good Fair Good Fair
Mineral Hydraulic Oil NR NR NR Very Good Good Very Good NR Good
Water/Glycol Fair Very Good Fair Very Good Very Good Very Good Good Good
Water in Oil Emulsions NR NR NR Fair Very Good Very Good NR Good
Oil in Water Emulsions NR NR NR Fair Very Good Very Good Fair Good
Phosphate Ester NR Good NR NR NR Good Good Fair
Water above 80c NR Excellent Fair Fair Very Good Fair Excellent Very Good

N.R : NOT RECOMMENDED
The above information is provided as a guide only and suitability may be infuenced by other factors eg. Temp, Pressure etc. Specific recommendations will be given in response to full information

Typical Material Properties

Natural
Rubber
E.P.D.M. Neoprene Nitrile HNBR Flurucarbon E.G. Viton ® Silicone Flurosilicone
Max Continuous degrees C 70 120 100 120 150 200 200 180
Max Intermittent Temp degrees C 100 150 120 150 170 250 250 200
Low Temperature Flexibility -50 -45 -40 -20 -15 -15 -60 -60
Hardness Range 30-95 40-95 30-95 40-95 50-95 50-98 20-80 40-80
Tensile Strength Excellent Good Good Good Very Good Very Good Poor Poor
Compression Set Good Good Fair to Good Good Good Good Good Good
Tear & Abrasion Resistance Excellent Good Good Good Very Good Good Poor Poor
Permeability to Gases Poor Fairly Low Low Low Low Very Low Fairly Low Fairly Low
Flame Resistance Poor Poor Self Extinguishing Poor Poor Self Extinguishing Excellent Excellent
Water Resistance below 80 degrees C Very Good Excellent Good Good Good Good Good Good
Ozone & Weathering Poor Outstanding Good Fair Good Outstanding Outstanding Outstanding
Cost Factor 1 1 2 2 6 15 4 40

The above information is provided as a guide only and suitability may be infuenced by other factors eg. Temp, Pressure etc. Specific recommendations will be given in response to full information. Viton® is a registered trademark of DuPont Dow Elastomers