Comparison of performance and characteristics of various rubber raw materials
1 Natural rubber (NR)
Natural rubber (NR) is a polymer of isoprene. It has excellent resilience, tensile strength, elongation, wear resistance, tear and compression permanent deformation performance superior to most synthetic rubbers. Suitable for making tires, shock absorbing parts, buffer ropes, and sealing parts. Not resistant to oil, poor weather, ozone, and oxygen resistance. The operating temperature range is -60~100 ℃.
2 styrene butadiene rubber (SBR)
Styrene butadiene rubber (SBR) is a copolymer of butadiene and styrene. The butadiene styrene 10 containing 10% styrene has good cold resistance, while the butadiene styrene 30 containing 30% styrene has excellent wear resistance. Suitable for making tires and sealing parts, but the product has poor oil resistance and aging resistance. The temperature range for use is -60~120 ℃.
3 Neoprene rubber (CR)
Chloroprene rubber (CR) is a chloroprene polymer that is weather resistant, ozone resistant, self extinguishing, and has oil resistance, second only to nitrile rubber. It has excellent tensile strength, elongation, and resilience, and has good adhesion to metals and fabrics. Suitable for making sealing rings and sealing profiles, rubber hoses, coatings, wire insulation layers, adhesive tapes, and preparing adhesives. The product is not resistant to synthetic diester lubricating oil and phosphate ester hydraulic oil. The operating temperature range is -35~130 ℃.
4 Nitrile rubber (NBR)
Nitrile rubber (NBR) is a copolymer of butadiene acrylonitrile. Generally, it contains 18%, 26%, or 40% acrylonitrile. The higher the content, the better the oil resistance, heat resistance, and wear resistance, but the opposite is true for cold resistance. Nitrile rubber containing carboxyl groups has better wear resistance, high temperature resistance, and oil resistance than nitrile rubber. Nitrile rubber is suitable for making various oil resistant sealing parts, membranes, rubber hoses, and soft oil tanks. The product is not resistant to weather, ozone aging, and phosphate ester hydraulic oil. The operating temperature range is -55~130 ℃.
5 Ethylene propylene rubber (EPM, EPDM)
Ethylene propylene rubber is a binary copolymer (EPM) of ethylene and propylene or a ternary copolymer (EPDM) of ethylene, propylene, and diene olefins. Weather resistant, ozone resistant, resistant to steam, phosphate hydraulic oil, acid, alkali, rocket fuel and oxidant, with excellent electrical insulation performance. Suitable for producing sealing parts, rubber hoses, aircraft, automotive door and window sealing profiles, adhesive tapes, and wire insulation layers for phosphate ester hydraulic oil systems. The product is not resistant to petroleum based oils. The operating temperature range is -60~150 ℃.
6 Butyl rubber (IIR)
Butyl rubber (IIR) is a copolymer of isobutylene and isoprene. Resistant to weather and ozone aging, phosphate ester hydraulic oil, acid, alkali, rocket fuel, and oxidants, with excellent dielectric and insulation properties, and minimal breathability. Suitable for making tire inner tubes, door and window sealing strips, sealing parts for phosphate ester hydraulic oil systems, rubber hoses, insulation layers for wires, adhesive tapes, and shock absorbers. The product is not resistant to petroleum based oils. The operating temperature range is -60~150 ℃.
7 Chlorosulfonated polyethylene rubber (CSM)
Chlorosulfonated polyethylene rubber (CSM) is resistant to weather and ozone aging, and its oil resistance increases with its chlorine content. It is acid and alkali resistant, suitable for making adhesive tapes, connecting sleeves for automotive air filters, radiator drainage pipes, sealing pads, cable sleeves, anti-corrosion coatings, and outer walls of soft oil tanks. The operating temperature range is -50~150 ℃.
8 polyurethane rubber
Polyurethane rubber is polyurethane. There are usually two types: polyester (AU) and polyether (EU). It has excellent tensile strength, tear strength, and wear resistance, excellent oil and ozone resistance, as well as resistance to atomic radiation. Suitable for producing various shapes of sealing energy absorption devices, punching templates, vibration damping devices, mechanical support gaskets, flexible connections, anti wear coatings, friction power transmission devices, rubber rollers, etc. The operating temperature range is -60~80 ℃. It should not come into contact with esters, ketones, phosphate ester hydraulic oils, concentrated acids, alkalis, vapors, etc.
9 Polysulfide rubber (T)
Polysulfide rubber (T) is a polysulfide alkane polymer, which can be divided into two types: solid polysulfide rubber and liquid polysulfide rubber. Good oil resistance, weather aging resistance, low breathability, and excellent electrical insulation. Solid rubber is usually used in conjunction with nitrile rubber to manufacture sealing parts, hoses, and membranes for fuel systems. The usage temperature range is -50~100 ℃, and can reach 130 ℃ in a short period of time. Liquid adhesive is usually used to prepare sealing agents.
10 Chlorohydrin rubber
Chlorohydrin rubber is a polymer of epichlorohydrin hydrocarbons (CO), a binary copolymer of epichlorohydrin and ethylene oxide (ECO), or a ternary copolymer with a third monomer (epichlorohydrin) added. It has oil and ozone resistance, better heat resistance than adhesive, and less breathability. Suitable for making sealing gaskets and diaphragms.
11 Acrylate rubber (ACM)
Acrylate rubber (ACM) is a new type of special rubber developed internationally, with excellent properties such as heat resistance, oil resistance, cold resistance, and ozone resistance. According to needs, it can be used in combination with fluororubber, nitrile rubber, chlorosulfonated polyethylene, ethylene propylene diene rubber, etc. to achieve high temperature and oil resistance. Widely used in high-temperature oil seal materials for automobiles and military equipment, adhesives for container and pipeline lining, and building sealants, as well as outer sheaths for special wire and cable insulation and shock absorption products.
12 silicone rubber
Silicone rubber is polysiloxane. Usually there are dimethyl silicone rubber (MQ), methyl vinyl silicone rubber (MVQ), methyl phenyl silicone rubber (MPQ), methyl phenyl vinyl silicone rubber (MPVQ), etc. Silicone rubber has excellent heat resistance, cold resistance, and aging resistance, excellent insulation resistance and dielectric properties, good thermal conductivity, but poor strength and tear resistance, oil resistance, and high price. Generally suitable for making sealing rings, sealing profiles, oxygen corrugated pipes, diaphragms, shock absorbers, insulation materials, and insulation sponge rubber plates. The operating temperature range is -70~280 ℃.
13 Fluoroelastomer (FPM)
The commonly used fluororubber (FPM) are fluororubber 26 and fluororubber 246. The former is a copolymer of vinylidene fluoride and hexafluoropropene, while the latter is a copolymer of vinylidene fluoride, tetrafluoroethylene, and hexafluoropropene. Fluorine rubber has outstanding heat, oil, acid, and alkali resistance, excellent aging and electrical insulation properties, flame retardant, and low breathability. But the low-temperature performance is poor. The general usage temperature range is -40~250 ℃, and can reach 300 ℃ in a short period of time. Suitable for producing various sealing parts, rubber hoses, tapes, and fuel tanks that require heat and oil resistance, but the price is relatively expensive.
14 Fluorosilicone rubber (MFQ)
Fluorosilicone rubber (MFQ) is a polysiloxane containing fluoroalkyl groups. Excellent oil resistance, chemical resistance, heat resistance, cold resistance, and aging resistance, but low strength and tear resistance, making it expensive. Suitable for making sealing rings and diaphragms for fuel, diester lubricants, and hydraulic oil systems. The operating temperature range is -65~250 ℃.
Equipment related to rubber products:
75L dual hydraulic mixer