General properties of materials
Material | Polyvinyl chloride | Polyurethane rubber | Nature rubber | Styreen butadieen rubber | Ethyleen propyleen rubber |
Short | P.V.C. | P.U.R. | N.R. | S.B.R. | E.P.D.M. |
Max. temp. dry air | +60°C | +80°C | +70°C | +70°C | +120°C |
Max. temp. hot oil | - - | +60°C | - - | - - | - - |
Max. temp. hot water | +60°C | +40°C | +70°C | +80°C | +140°C |
Min. temp. | -10°C | -20°C | -40°C | -30°C | -50°C |
General resistance: | |||||
Mineral oils and fats | Moderate | Good | Low | Low | Low |
Animal / vegetable oils and fats | Moderate | Good | Low | Low | Good |
Diluted acids | Good | Moderate | Moderate | Moderate | Excellent |
Concentrated acids | Low | Low | Moderate | Moderate | Good |
Aliphates; gasoline, etc. | Low | Moderate | Low | Low | Low |
Aromatics; toluene, benzene, etc. | Low | Low | Low | Low | Low |
Esters, ethers, alcohol | Low | Low | Good | Good | Excellent |
Chlorinated; tetra, tri, etc. | Low | Low | Low | Low | Moderate |
Water absorbation | Good | Excellent | Excellent | Good | Excellent |
Sunlight and Ozon | Moderate | Excellent | Low | Low | Excellent |
Elasticity | Good | Good | Excellent | Good | Moderate |
Permanent distortion | Low | Moderate | Good | Good | Good |
Wear resistance | Good | Excellent | Excellent | Excellent | Good |
Gas permeability | Low | Moderate | Moderate | Moderate | Moderate |
Electrical isolation | Good | Good | Good | Good | Excellent |
Hardness range | 60-85 | 50A-75D | 30-90 | 40-90 | 40-90 |
Flame resistance | None | None | Low | Low | Low |
Traction | 20-30 Mpa | 20-30 Mpa | 18-30 Mpa | 15-25 Mpa | 10-20 Mpa |
Properties | Chemical resistant, light in weight, colourfast, food resistant, non-toxic | Elastic, high mechanical strength, wear-resistant, ozone and weather-resistant, Oil and gasoline-resistant, gas-tight and notch-resistant, chemical-resistant | Elastic, cold-resistant, Hard-wearing, Resistant to low-concentration acids, resistant to water and low-temperature alcohol | Resistant to oil-containing air, water, industrial water, glycol | Heat resistant, current resistant, ozone and aging resistant, UV resistant and chemical resistant |
Thermal properties | -35°C / +70°C | -30°C / +90°C | -60°C / +80°C | -50°C / +100°C | -50°C / +160°C |
Material | Acrilnitril butadiene rubber (nitrile) | Chloropreen rubber (neoprene) | Silicone rubber | Cross-linked polyethyleen | |
Short | N.B.R. | C.R. | S.I. (Q) | U.P.E./X.L.P.E. | |
Max. temp. dry air | +90°C | +90°C | +180°C | +66°C | |
Max. temp. hot oil | +120°C | +60°C | - - | +60°C | |
Max. temp. hot water | +90°C | +70°C | +100°C | +66°C | |
Min. temp. | -20°C | -30°C | -60°C | -50°C | |
General resistance: | |||||
Mineral oils and fats | Excellent | Good | Moderate | Good up to 60°C | |
Animal / vegetable oils and fats | Excellent | Good | Moderate | Good | |
Diluted acids | Good | Excellent | Excellent | Excellent | |
Concentrated acids | Moderate | Good | Moderate | Excellent | |
Aliphates; gasoline, etc. | Excellent | Moderate | Low | Good | |
Aromatics; toluene, benzene, etc. | Good | Moderate | Low | Good | |
Esters, ethers, alcohol | None | Moderate | Moderate | Excellent | |
Chlorinated; tetra, tri, etc. | Moderate | Low | Low | Good | |
Water absorbation | Good | Good | Excellent | Excellent | |
Sunlight and Ozon | Moderate | Excellent | Excellent | Good | |
Elasticity | Moderate | Moderate | Good | Good | |
Permanent distortion | Good | Good | Moderate | Low | |
Wear resistance | Good | Excellent | Low | Moderate | |
Gas permeability | Low | Low | Moderate | Low | |
Electrical isolation | None | Moderate | Excellent | Good | |
Hardness range | 40-95 | 40-95 | 40-85 | - - | |
Flame resistance | Low | Good | Moderate | None | |
Traction | 15-20 Mpa | 15-20 Mpa | 10-20 Mpa | 30-35 Mpa | |
Properties | Resistant to mineral oil products, fats and fuels, inorganic acids with low concentration and temperature | Chemical resistant, aging ozone and weather resistant, flame resistant | Temperature resistant, cold and ozone resistant, odorless and tasteless | Chemical resistant, oxidation resistant, stable, gas-tight | |
Thermal properties | -30°C / +100°C | -45°C / +100°C | -60°C / +200°C | -50°C / +90°C |