Synthetic rubber comes in nearly a dozen major types with differing properties for various applications. Blücher sealing rings are available in three different rubber qualities epdm nbr and fpm.
Determination Of The Mechanical Properties Of Rubber By Ft Nir
Epdm and nbr difference. The lip sealing ring ensures quick and efficient jointing of the pipe system while providing a tight seal in case of both pressure and vacuum. A lip sealing ring constitutes the seal between socket an spigot end. One attraction to nbr is its stability in low temperatures with the ability to survive extreme cold of 30c 22f which epdm and silicone cant match. Epdm is known as m class rubber since it has saturated chains of polymethylene. Nbr is an unsaturated carbon rubber which is polymer made from acrylonitrile and butadiene. The biggest differences between these two rubber products lie in their resistance to petroleum based fuel and lubrication products and their resistance to weathering.
Excellent ozone chemical and aging resistance. Epdm has a lower compression set a higher tensile strength a better resistance to heat aging and high weathering resistance. Nitrile is king of elastomers when it comes to oil and fuel resistance. Two common synthetic rubber compounds are known as epdm and nitrile rubber. Nitrile butadiene rubber nbr stands alone as the most oil and fuel resistant elastomer. The strength of nbr lies in its moderate costs and good resistance to swelling caused by hydrocarbons or acids.
There are 10 material properties with values for both materials. What is the difference between neoprene and epdm. Animal and vegetable oils ozone strong and oxidizing chemicals. However an sbr product will have a much better resistance to abrasions than an epdm product would. It is a synthetic rubber copolymer of acrylonitrile and buta diene. Nitrile butadiene 30 f 250 f.
Both epdm rubber and sbr rubber are thermoset elastomers rubber. Epdm is usually made into water pipe. Nitrile butadiene rubber nbr. It is incompatible with petroleum oil and gasoline but it is compatible with alcohols ethanol methanol and nitromethane water coolants both ethylene and propylene glycol and glycol based brake fluid. Nbr epdm what is nbr and what are the applications. Epdm is a synthetically produced ethylenepropylene rubber and an elastomer which is most widely used in both general purpose and special purpose applications.
Mineral oils and solvents aromatic hydrocarbons. Moreover epdm shows excellent environmental and chemical resistant properties. The acrylonitrile amount from low to high and oil resistant will enhance and cold resistance will decline during the producing. Epdm beats sbr in tensile strength and resistance to heat aging and weathering. Nbr has a better oil resistant compared with epdm but epdm has a good wear resistance aging resistant and heat resisting. Properties with values for just one material 2 in this case are not shown.
Poor resistance to petroleum based fluids. For each property being compared the top bar is epdm rubber and the bottom bar is sbr rubber. Ethylene propylene 40 f 300 f. Nbr stands for nitrile butadiene rubber. Epdm while nbr and fkm have similar chemical resistance epdm is completely different.
Gallery of Epdm And Nbr Difference
