Rubber material selection guide hnbr or highly saturated. Plasticizer, dibutylphthalate was of laboratory reagent grade. Properties of rubber styrene butadiene sbr o riginally developed as a low cost substi tute for natural rubber but not necessarily always the case good water resistance and a brasion resistance maximum continuous operating temperature about 225 f p oor weathering, but can overcome with specific raw materials. Pdf investigation of physical, mechanical and biodegradation. Grades with high acrylonitrile content have better oil resistance whereas low acrylonitrile content gives better low temperature flexibility and resilience. Petroleum, solvents, coal tar solvents, aromatic hydrocarbons. An elastomer is a solid, hence, the eventual progression to thermodynamic stability is the procession from a solid, to a liquid, ultimately a gas. White nitrile rubber sheet also has excellent tensile strength 6 mpa, minimum which allows it to be used to make gaskets. Its a synthetic rubber polymer known for its superior resistance to fuels such as kerosene, diesel, lubricating oils, grease and petroleum based transmission fluids. Nitrile rubber, also called nitrile butadiene rubber nbr, bunan, is a synthetic rubber that provides excellent resistance to petroleumbased oils as well as mineral and vegetable oil. Rubber material selection guide nbr nitrile or buna n. Nitrile 70, nitrile rubber properties, nitrile specifications. The polymer is made in the form of a latex or emulsion and can be used or processed very much like natural rubber latex. Although its physical and chemical properties vary depending on the polymers composition of nitrile, this form of synthetic rubber is unusual in being generally resistant to oil, fuel, and other chemicals the more nitrile within the.
Nitrile rubber, also known as nbr, bunan, and acrylonitrile butadiene rubber, is a synthetic rubber copolymer of acrylonitrile acn and butadiene. Animal and vegetable fats, oils, greases, ozone, strong and oxidizing chemicals. Rubber material selection guide hnbr or highly saturated nitrile. Resistance to alkalis and acids increases as the nitrile content of the compound increases. Pdf chemical degradation of nitrile rubber in biodiesel. As wells began producing increasing amounts of hydrogen sulfide h2s through stimulation or reservoir conditions coupled with higher production temperatures, sporadic seal and packer failures have been. Dmr nbr is a black nitrile butadiene rubber, commonly referred to as nbr, nitrile or buna. Nitrile rubber of medium acrylonitrile content, chemaprene n339, a product from synthetics and chemicals, bereilly, india was used for the study. Nitrile is a synthetic latex, a rubber product resulting from research undertaken between the two world wars.
Nitrile has excellent resistance to oil, gasoline, solvents, mineral and vegetable oils, hydraulic fluid, and fuels. The prefix cyano is used interchangeably with the term nitrile in industrial literature. Matl style code metro industries material specification. It is commonly used to make hoses, seals, gloves, and many other industrial products. Like nbr, this type of elastomer has excellent resistance to oils and fuels but. Hnbr can be used with a wide range of temperatures 40c to 165c with minimal degradation of the compound. A flex class 1 nitrile sheet thickness mm 6 9 16 19 25 32 packing details length roll 40 mtrs. Preparation of ldpeevapema, nano clay blend composite in the stage. Nitrile gloves are made from a synthetic polymer that exhibits rubber like characteristics when vulcanised. Preparation and properties of nitrile rubbermontmorillonite nanocomposites via latex blending article pdf available in journal of materials science 4122. Good physical properties and chemical resistance to the most common hydraulic fluids makes nbr an excellent sealing material.
The properties of hydrogenated nitrile rubber hnbr depend upon the acrylonitrile content and the degree of hydrogenation of the butadiene copolymer. Nitrile bunan nbr rubber is an economical material that provides high resistance to oils and hydrocarbon based fluids. The most stable thermodynamic state highest entropy is a gas. Mechanical and biodegradation properties of nitrile butadiene rubber by. Timco rubber can work with your business to design and provide nitrile parts customized for the specific needs of your applications. Nr, and styrenebutadiene rubber, which is the most important sort of synthetic. Nitrile rubber can generally be used down to about 30c but special grades of nbr can work at lower temperatures too. Following is the list of nitrile rubber properties. The effect of different nitrile butadiene rubber nbr, hydrogenated nitrile butadiene rubber hnbr, and carboxylated nitrile butadiene xnbr, were evaluated in a down hole packer application.
Nbr or the nitrile synthetic rubber is considered the workhorse of the rubber products of the automotive and other industrial units. Nitrile should not be used in highly polar solvents such as acetone and mek ozone. Nitrilepvc resin blends minnesota rubber and plastics. Nitrile rubber nbr, an oilresistant synthetic rubber produced from a copolymer of acrylonitrile and butadiene. Nitrile often referred to as bunan rubber or perbunan is the most commonly used elastomer in the seal industry.
This type of rubber has a high tensile strength ranging from 21 to 31 mpa. The properties of these rubber compounds are determined by its acn content, which is broken down into three classifications. Nitrile rubber properties depends on the acrylonitrile content and with the increase in the can content, its tg glass transition temperature is also increased which will also increase the brittleness temperature of the nitrile rubber. The mechanical response of nitrile rubber can be tested in many different ways. Identification of the substancemixture and of the companyundertaking. Technical information epdm rubber gaskets kastrade. Pdf nitrile butadiene rubber nbr as a high consumption of plastic is widely utilized. Commercial nitrile bunan style 35 jump to navigation a smooth finish blended nitrile sheet, which is offered in a range of five durometers. Bulletin of the transilvania university of bra sov vol. Its main applications are in fuel hoses, gaskets, rollers, and other products in which oil resistance is required. Nitrile butadiene rubber nbr is a family of unsaturated copolymers of 2propenenitrile and various butadiene monomers 1,2butadiene.
Pdf effect of nitrile butadiene rubber nbr on mechanical and. The nitrile rubber properties that are listed below are for our most popular nitrile 70 durometer 70a rubber material compound. Nitrile orings are used with gasoline, crude oil, power steenngflllid, hexane, toluene, watel. Complex, vulcanized acrylonitrile butadiene elastomer. Nbr is actually a complex family of unsaturated copolymers of acrylonitrile and butadiene. Nitrile rubber nbr, bunan provides excellent oil resistance. Nitrile acrylonitrilebutadiene nitrile acrylonitrilebutadiene has very goodoil, gasoline and abrasion resistance.
Hnbr is widely known for its physical strength and retention of properties after longterm exposure to heat, oils and chemicals. It is the most widely used and economical elastomer. The general properties of common polymers used in sheet rubber shown in the chart below are not intended to be used to make final choices for a. Nbr materials are one of the most commonly used elastomers in sealing applications.
Our rubber products are a proprietary blend of various polymers formulated to meet stated physicals and specifications. Rubber material selection guide xnbr or carboxylated nitrile abbreviation xnbr astm d2000 classification bf, bg. Rubber and elastomers overview professional plastics. Nitrile rubber, also called nitrilebutadiene rubber nbr, bunan, is a synthetic rubber that provides excellent resistance to petroleumbased oils as well as mineral and vegetable oil. Timco rubber can work with your business to design and provide nitrile parts customized for the. Our rubber products are a proprietary blend of various polymers formulated to. The synthetic rubber manual, 9th edn, international institute of synthetic. General features nitrile rubber is a copolymer of acrylonitrile acn and butadiene that is generally resistant to oil, fuel, aliphatic hydrocarbons, and other chemicals, but can be attacked by ozone, aromatic hydrocarbons, ketones, esters and aldehydes. Nitrile has excellent resistance to oil, gasoline, solvents.
Rubber material selection guide xnbr or carboxylated nitrile. Nitrile white rubber food grade discount rubber direct. Nbr offers excellent resistance to petroleumbased oils and fuels, silicone greases, hydraulic fluids, water and alcohols. Its temperature range dry heat is approximately 40c 120c. Nitrilepvc resin blends nbrpvc pvc resins are blended with nitrile polymers to provide increased resistance to ozone and abrasion. Nitrile rubber sheet page 1 of 2 white, fda compliant.
Fluorosilicones combine most of the attributes of silicone with resistance to. Matl style code metro industries material specification rsbne60. These materials offer a versatile range of properties and are used in numerous applications. Nitrile butadiene rubber nbr is a family of unsaturated copolymers of 2propenenitrile and various butadiene monomers 1,2butadiene and 1,3butadiene. Please note that information presented here is general to nitrile polymer. Its high resistance to oils and chemicals make it a useful manufacturing material for the automotive seals and disposable glove industries.
Nitrile rubber nbr is the general term for acrylonitrile butadiene copolymer. The pvc also provides a significant improvement in solvent resistance yet maintains similar chemical and physical properties, commonly noted among nitrile elastomers. Effect of nitrile butadiene rubber nbr on mechanical and tribological properties of composite friction brakes. By selecting an elastomer with the appropriate acrylonitrile content in balance with other properties, industrial nitrile rubber nbr is used in. The other chemicals used were of industrial purity. In the production of nbr, acrylonitrile ch2chcn and butadiene. Blending of nitrile rubber with plasticised pvc produces vinylbased thermoplastic elastomers. Acrylonitrilebutadiene rubber nbr properties and applications nitrile rubber nbr is commonly considered the workhorse of the industrial and automotive rubber products industries.
Excellent physical properties including abrasion and low temperature resistance. There are some differences, which make this polymer unique. The properties and characteristics of manufactured rubber products may vary based on polymer type and formulation. Trade names include perbunan, nipol, krynac and europrene nitrile butadiene rubber nbr is a family of unsaturated copolymers of 2propenenitrile and various butadiene monomers 1,2butadiene and 1,3butadiene.
Epdm enhance the ozone resistance of nbr without reduction in physical. Parcos most popular matelialfor orings is nitrile compound 420070. Trade names include perbunan, nipol, krynac and europrene. An important factor in the properties of nbr is the ratio of acrylonitrile groups to. Background information on the actual rubber products and their expected environment and service conditions is also presented.
Nitrile rubber, also known as nbr, bunan, and acrylonitrile butadiene rubber, is a synthetic. Several studies have been carried out to reuse scraptires in a variety of rubber and plastic products, incineration for production of electricity. Nitrile rubber is a copolymer of butadiene and acrylonitrile that possesses unique physical and chemical properties that make it one of the most widely used synthetic elastomers in the world. Several studies have been carried out to reuse scraptires in a variety of rubber and plastic products, incineration for production of electricity, or as fuel for cement kilns, as well as in asphalt concrete. Here you will find our nitrile specifications chart which can also be downloaded in pdf. Nitrile rubber belongs to the family of unsaturated copolymers of acrylonitrile and butadiene.
General properties of elastomers elbex corporation. Nitrile rubber is resistant to oil, caustics, aliphatic hydrocarbons, and hydraulic fluids and chemicals. Nitriles are found in many useful compounds, including methyl cyanoacrylate, used in super glue, and nitrile rubber, a nitrilecontaining polymer used in latexfree laboratory and medical gloves. Engineering sciences mechanical properties of rubber an overview al. Hnbrs have better oil and chemical resistance than nitrile rubbers and can also withstand much higher temperatures. Nitrile must be specially compounded for resistance to ozone, sunlight and natural aging. The example shown here used uniaxial compression at different strain rates and strain cycles.
Acrylonitrile butadiene rubber nbr, usually shortened to nitrile, was developed in 1941 as the first oil resistant rubber. Nitrile, or bunan, is a copolymer of butadiene and acrylonitrile. Contact timco for more information about custom nitrile parts for your business. Its a synthetic rubber polymer known for its superior resistance to fuels such as kerosene, diesel, lubricating oils, grease and petroleum based transmission fluids nitrile bunan nbr is available in sheet, cloth inserted, extruded, or molded forms. Material safety data sheet nitrile rubber section 1. A wide variety of nitrile rubber properties options are available to you, there are 111 suppliers who sells nitrile rubber properties on, mainly located in asia. Nbr rubber,nitrile rubber properties,applications of nbr.
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