Rubber products classification
Time：2014-10-30 14:11:34 Views：8296
Natural Rubber
Made of rubber tree latex is collected, isoprene polymer. With wear resistance, high elasticity, tensile strength and elongation as well. Aging in air, the heat variable viscosity, easy expansion in mineral oil or gasoline and dissolved, but not resistant to strong acid and alkali. Advantages: good elasticity, acid and alkali resistance. Disadvantages: not weather, not oil resistant (resistant to vegetable oil) is the production of adhesive tape, rubber hose, rubber overshoes of raw materials, and is suitable for the production of shock absorber parts, brake products using oil, ethanol with hydroxide liquid in the automobile.
Styrene Butadiene Copolymer
Ding two cyclohexene and styrene copolymer, comparison, and natural rubber of uniform quality, foreign matter less, has better wear resistance and aging resistance, but the mechanical strength is weak, can use synthetic and natural rubber mixing. Advantages: low cost non oil resistant material, good water resistance, hardness below 70 with good elasticity, high hardness with poor compressibility,: do not recommend the use of strong acid, ozone, oil, oil esters and fatty and most of the hydrocarbon compounds. Widely used in the tire industry, shoes, cloth and conveyor belt industry etc..
Butyl Rubber
Isobutylene isoprene is polymerized with a small amount, due to steric hindrance of molecular motion of the polymer methyl than other less, so the gas permeability is less, resistance to heat, sunlight, ozone, electrical insulation good; for polar fluxing agent resistance, generally the use temperature range of -54-110 DEG C advantages: most of the general. Gas with impermeability, resistance to sunlight and smell good to be exposed to animal or vegetable oil or chemical gasifiable materials. Disadvantages: not recommended and oil soluble agent, adhesive of kerosene and aromatic hydrogen also used for automobile tire inner tubes, leather, rubber paste paper, window frame, steam hose, rubber heat resistant conveyor belt etc.
Hydrogenate Nitrile
Hydrogenated nitrile rubber as part of double chain removal via the hydrogenated NBR rubber, the hydrogenated and its temperature resistance, weatherability than general NBR improved a lot, oil resistance and similar general NBR rubber. The general use of the temperature range of -25~150 DEG C. Advantages: abrasion resistance better than NBR rubber has excellent corrosion resistance, and tensile, anti tear and compression properties.
Good resistance to ozone and other atmospheric conditions, cleaning agent is generally applicable to washing or washing dishes. Disadvantages: not recommended for use in alcohols, esters or solution aromatic in refrigeration and air conditioning industry, widely used for the seal of refrigerant R134a in the system. The car engine system seals.
Ethylene propylene Rubber
From ethylene and propylene is polymerized, therefore the heat resistance, aging resistance, ozone resistance, stability are very good, but not sulfur and sulfur. In order to solve this problem, in the main chain of EP into a small amount of third components of double chain and can add sulfur namely into EPDM, the general use of temperature for -50~ 150 C in a polar solvent such as alcohol and ketone resistance excellent advantages: good resistance and ozone resistance, water resistance and anti chemical material with excellent, can use the alcohols and ketones, high-temperature steam, impermeability to gases with good. Disadvantages: not recommended for food use or be exposed to aromatic hydrogen. High temperature water vapor environment seal seal or parts of bathroom. Brake (brake) system of rubber parts. Radiator (automobile water tank) in the seal.
Nitrile Rubber
By acrylonitrile and butadiene copolymerization, acrylonitrile content by 18%~50%, acrylonitrile content higher, better resistance to petrochemical oil hydrocarbon fuel oil, but the low temperature performance variation, generally the use temperature range of -25~100 DEG C. Ding Qingjiao is currently the rubber O - ring seal and the most commonly used one of the advantages of: oil resistant, good resistance to water, characteristics of anti solvent and anti high pressure oil. With good compression, abrasion resistance and elongation stress.
Disadvantages: not suitable for polar solvents, such as ketones, nitro hydrocarbons, ozone, MEK and chloroform.? for the production of the fuel tank, lubricating oil tank and oil system used in the hydraulic oil, gasoline, water, silicon oil, two ester lubricants and other fluid medium rubber parts, especially the parts can be said to be sealed. At present, the most widely uses, the lowest cost of rubber seals
Neoprene 、 Polychloroprene
By chlorine butene monomer polymerized rubber elasticity after curing. The wear resistance of the good, not afraid of sunlight directly irradiating, weather particularly good performance, not afraid of intense distortion, not afraid of refrigerant, resistance, resistance to dilute acid, silicon ester lubricants, but not resistant to phosphoric acid ester type hydraulic oil. Yi Jiejing, at low temperature hardening, poor storage stability in low aniline point of mineral oil in large expansion quantity. The general use of the temperature range of -50~150 DEG C. Advantages: good elasticity and good compression deformation formula not containing sulphur is therefore very easy to make. The properties of anti animal and vegetable oil, not because the neutral compound, fat and oil and oil, solvent and the impact of property, anti combustion properties.
Disadvantages： Does not recommend the use of strong acid, chemical nitro hydrocarbons, esters, ketones compounds in chloroform and R12 the seal resistance to refrigerant, appliances or seal on the rubber parts. Suitable for making various kinds of direct contact with the atmosphere, sunlight, ozone parts. Applicable to all kinds of fire resistance, chemical corrosion resistant rubber products.