Characteristics and disadvantages of general rubber--SKY Rubber
- Butyl rubber (IIR)
Advantages: excellent air tightness, good ozone resistance, aging resistance, high heat resistance (long-term working ≤ 130℃); resistance to strong inorganic acids (sulfuric acid, nitric acid, etc.) and general organic solvents, good vibration absorption and damping, and electrical insulation.
Disadvantages: poor elasticity, poor processing performance, slow vulcanization rate, weak adhesion and oil resistance.
Operating temperature range: -40～120℃
- Neoprene (CR)
Advantages: Excellent oxygen and ozone resistance, non-flammable and self-extinguishing; oil resistance, solvent resistance, acid and alkali resistance, aging resistance, good air tightness, physical and mechanical properties better than natural rubber, can be used as general or special rubber.
Disadvantages: poor cold resistance, high density, high cost, poor electrical insulation; easy to stick to rollers, burn and stick to molds during processing, poor raw rubber stability and difficult to preserve.
Operating temperature range: -45～100℃
- Styrene-butadiene rubber (SBR)
Advantages: better wear resistance, aging resistance and heat resistance than natural rubber, and more uniform texture.
Disadvantages: low elasticity, poor flexure and tear resistance; poor processing performance, poor self-adhesion and low raw rubber strength.
Operating temperature range: -50～100℃
- Butadiene rubber (BR)
Advantages: Excellent elasticity and wear resistance, good aging resistance, excellent low temperature resistance (outstanding low temperature performance); low heat generation under dynamic load and easy adhesion to metal.
Disadvantages: low strength, poor tear resistance, weak processing performance and self-adhesion.
Operating temperature range: -60～100℃
- Isoprene rubber (IR)
Advantages: It has most of the advantages of natural rubber and its aging resistance is better than that of natural rubber.
Disadvantages: Elasticity and strength are slightly lower than natural rubber, processing performance is poor, and the cost is higher.
The operating temperature range is -50～100℃.
- Nitrile rubber (NBR)
Advantages: Outstanding resistance to gasoline and aliphatic hydrocarbon oils (second only to polysulfide rubber, acrylate, and fluororubber, and superior to other general-purpose rubbers); good heat resistance, excellent air tightness, wear resistance, water resistance, and strong adhesion.
Disadvantages: poor cold resistance and ozone resistance, low strength and elasticity; poor acid resistance, poor electrical insulation, and weak resistance to polar solvents.
The operating temperature range is -30 to 100°C.
- Hydrogenated nitrile rubber (HNBR)
Advantages: High mechanical strength and wear resistance; when cross-linked with peroxide, its heat resistance is better than that of nitrile rubber (NBR), and its other properties are consistent with NBR.
Disadvantages: higher price.
The operating temperature range is -30 to 150°C.
- Ethylene propylene rubber (EPM/EPDM)
Advantages: Ozone resistance, UV resistance, weather resistance, and aging resistance rank first among general-purpose rubbers; electrical insulation, chemical resistance, impact elasticity are good, acid and alkali resistance, low density, and high filling and matching are possible; heat resistance reaches 150°C, and it is resistant to polar solvents such as ketones and esters. The physical and mechanical properties are slightly inferior to natural rubber but better than styrene-butadiene rubber (SBR) .
Disadvantages: Poor self-adhesion and mutual adhesion, not easy to bond.
The operating temperature range is -50 to 150°C.