Features And Applications Of Rubbers In Common Use
Category of Rubber ( ASTM D1418 ) | Chlorine Butadiene Rubber ( CR ) | Nitrile Butadiene ( NBR ) | Ethylene Propylene (EPM‧EPDM) | Acrylic rubber (ACM‧ANM) | Silicone Rubber (SIR/VMQ) | Fluoro Silicone Rubber (FVMQ) | Fluorine rubber (FPM / Viton) | |
Main Features | Good weatherability. Good resistance to aging, ozone, pharmaceutical. | Good resistance to oil, abrasion and aging. | Excellent resistance to heat, water and steam, alkali, mild acidic and oxygenated solvents, ozone, and sunlight. Good resistance to brake fluid. | Excellent oil resistance against high temperature. Excellent ozone and weathering resistance. | Excellent heat, ozone and corona resistance, very well dielectric stability, and resistance to many oils, chemicals, and solvents. | Good resistance to corrosion, fuel and hydraulic oil and chemical reagents. Drawback : Too expensive | Excellent resistance to pharmaceutical, high- and low-temperature, oil, solvent, flame, chemical and good weatherability. Drawback : Too expensive | |
Property Of Natural Rubber | Specific Gravity | 1.15~1.25 | 1.00~1.20 | 0.86~0.87 | 1.09~1.10 | 0.95~0.98 | 1.4 | 1.80~1.82 |
ML Viscosity 1+4 ( 100℃ ) | 45~120 | 30~100 | 50~150 | 45~60 | Liquid State | 65~180 | ||
Physical Properties Of Synthetic Rubber | JIS Hardness Range | 10~90 | 15~100 | 30~90 | 40~90 | 30~90 | 50~80 | 50~90 |
Tensile Strength (Kg/cm²) | 50~250 | 50~250 | 50~200 | 70~120 | 40~100 | 70~200 | ||
Elongation (%) | 1000~100 | 800~100 | 800~100 | 600~100 | 500~50 | 50~200 | 500~100 | |
Resilience | ◎ | ○ | ○ | △ | ◎ | △ | △ | |
Crack | ○ | ○ | △ | △ | ╳~△ | ○ | ||
Abrasion Resistance | ○~◎ | ◎ | ○ | ○ | ╳~△ | ◎ | ||
Bending Crack Resistance | ○ | ○ | ○ | ○ | ╳~○ | ○ | ||
Heat resistance (Maximum Operating Temperature ℃) | 100 | 100 | 150 | 150 | 250 | 200 | 250 | |
Cold Resistance (Embrittlement Temperature ℃) | -40 ~ -35 | -20 ~ -10 | -60 ~ -40 | -30 ~ 0 | -70 ~ -50 | -70 ~ -40 | -26 | |
Aging Resistance | ◎ | ◎ | ◎ | ◎ | ◎ | ╳~△ | ◎ | |
Light Resistance | ○ | ○ | ◎ | ◎ | ◎ | ◎ | ◎ | |
Ozone Resistance | ◎ | ╳ | ◎ | ◎ | ◎ | ◎ | ◎ | |
Flame Resistance | ○ | ~△ | ╳ | ╳~△ | ╳~○ | ◎ | ◎ | |
Electrical Insulating Resistance (Ωcm) (Volume Resistivity) | 10 10~10 12 | 10 2~10 10 | 10 12~10 15 | 10 8~10 10 | 10 11~10 15 | 10 15~10 18 | ||
Gas Permeability Resistance | ○ | ○ | ○ | ○ | △ | ◎ | ||
Radiation Resistance | △~○ | △~○ | ╳ | ╳~○ | △~◎ | △~○ | ||
Oil And Solvent Resistance Of Synthetic Rubber | Gasoline/Naphtha | ○ | ◎ | ╳ | ◎ | ╳~△ | ◎ | ◎ |
Benzene / Toluene | ╳ | ╳-○ | △ | ╳ | ╳~△ | ◎ | ◎ | |
Liquid Aliphatic | ╳ | ╳ | ╳ | ╳ | ╳~○ | ○ | ||
Alcohol | ◎ | ◎ | ◎ | ╳ | ◎ | ◎ | ||
Ether | ╳~△ | ╳~△ | ○ | ╳ | ╳~△ | ╳~△ | ||
Ketone (M E K) | △~○ | ╳ | ◎ | ╳ | ○ | ╳ | ||
Acetic Acid/Ethyl Ester | ╳ | ╳~△ | ◎ | ╳ | △ | ╳ | ||
Acid And Alkali Resistance Of Synthetic Rubber | Water | ◎ | ◎ | ◎ | △ | ○ | ◎ | ◎ |
Organic Acid | ╳~△ | ╳~△ | ╳ | ╳ | ○ | ╳ | ||
High Concentration of Inorganic Acids | ○ | △ | ○ | △ | △ | ◎ | ||
Low Concentration of Inorganic Acids | ◎ | ○ | ◎ | ○ | ○ | ◎ | ||
High Concentration of Alkali | ◎ | ○ | ◎ | △ | ◎ | ╳ | ||
Low Concentration of Alkali | ◎ | ○ | ◎ | ○ | ◎ | △ |
◎Excellence | ○Good | △Fair | ╳Inferior |