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NBR Rubber Products The Main Purpose

Edit:Rizhao Tongrui Rubber Products Co.,Ltd  Date:Oct 09, 2017

Nitrile rubber is made of butadiene and acrylonitrile by emulsion polymerization method, nitrile rubber is mainly produced by low temperature emulsion polymerization, excellent oil resistance, high wear resistance, good heat resistance, strong bonding The The disadvantage is poor resistance to low temperature, poor ozone resistance, poor insulation performance, slightly lower elasticity. Nitrile rubber is mainly used in the manufacture of oil-resistant rubber products. Referred to as NBR, butadiene and acrylonitrile copolymerization made by a synthetic rubber. Is oil (especially alkane oil), anti-aging properties of synthetic rubber. Nitrile rubber in acrylonitrile content (%) are 42 ~ 46,36 ~ 41,31 ~ 35,25 ~ 30,18 ~ 24 five. The more acrylonitrile content, the better the oil resistance, but the corresponding decline in cold resistance. It can be used in air at 120 ° C or in oil at 150 ° C for a long period of time. In addition, it also has good water resistance, air tightness and excellent bonding properties. Widely used in a variety of oil-resistant rubber products, a variety of oil washers, gaskets, casing, flexible packaging, soft hose, printing and dyeing roller, cable plastic materials, in the automotive, aviation, oil, copying and other industries become essential Of elastic material.

performance

NBR has excellent oil resistance. The dibenzene monomer can be copolymerized into three different chain structures of cis, trans and 1,2-tentyl. The typical NBR structure is about 78%. As the NBR molecular chain structure contains cyano, oil resistance (such as resistance to mineral oil, liquid fuels, animal and vegetable oils and solvents) is better than natural rubber, chloroprene rubber and styrene butadiene rubber. Compared with other rubber NBR has a wider range of the use of temperature, its long-term use temperature of 120oC, while NBR has good resistance to low temperature performance, the minimum glass transition temperature of up to -55oC.

NBR has good chemical stability and good processing performance. With the increase of the relative density of the nitrile content in the structure, the vulcanization speed is accelerated and the tensile strength is improved, but the springback performance is decreased and the cold resistance is deteriorated. Since the cyanide in the NBR is susceptible to the polarization of the electric field, the dielectric properties are reduced, which is a semiconductor rubber. NBR can be divided according to the level of ACN, divided into high, high, high, medium and low acrylic nitrile 5 categories. Production methods are divided into two kinds of continuous and intermittent polymerization. Continuous polymerization is usually used for small varieties and large production production, low consumption. Intermittent polymerization method for multi-species and small batch production, the use of a small number of polymerization, the construction of high consumption. So far, do not see the trend of mutual substitution.

Nitrile rubber has excellent physical and mechanical properties and processing performance, but long-term use in acidic gasoline and high temperature (150oC) environment, such as fluorine-like plastic and acrylic soft plastic, for which the German companies, Canadian companies and Japanese companies Developed with excellent hydrogenated nitrile rubber (HNBR). In addition, also developed a very cold and high-purity nitrile rubber and shuttle nitrile rubber (XNBR), etc.

The main purpose

NBR because of its excellent oil resistance and physical and mechanical properties, widely used in the manufacture of a variety of oil-like plastic products, such as 0-ring, circle, hose and fuel tank lined rubber, printing roller, tank lining, Oil-resistant soles, hard rubber parts, fabric coating, pipe thread protection layer, pump impeller and wire foreskin, adhesive, food packaging film, rubber gloves and other fields. In 2014, there were more than 30 NBR countries in the world, and the largest consumption area was the production of oil-resistant hose products and flame-retardant conveyor belts, consuming about 53% of the total consumption of NBR. The use of nylon interlayer and chlorinated butyl rubber (am) to do the inner and outer structure, can produce fluoride can prevent the gas leakage of the new hose; using HNBR for the inner layer of plastic, nylon 66 for the reinforcement layer, using CSM as abduction Made in the car. Power steering, in 12 (rC can withstand the number of pulses 4 million times. In addition, nitrile rubber or car Asahi variable speed tape, loyalty belt, car and aircraft fuel like the ideal material. Rubber is mainly used in military, automotive, aviation industry, oil tank and bamboo film and other oil-based parts, but also for the seals, belts, hoses and plastic modified materials, etc. The amount increased in the year. Of the hose factory and sundries are more or less the use of NBR. Nitrile rubber is the second largest application of rubber products, widely used in aerospace devices, transformers, liquefied petroleum gas Shou gas pipeline, gas fcl cover, car 0 Type and other aspects of which automotive seals accounted for about 50% of the total amount of sealed plastic products. China's annual use of wire and cable products, nitrile rubber paste about lOOOt. Using dynamic curing technology and capacity technology can be made NBR / PP, NBR / PS, NBR / PV NBR / PAR, NBR / ACR, NBR / CSM, NBR / EPDM, NBR / BR and other new alloy materials, with good market before .NBR also used in the system Shantou plate, printing sticks, coal resistance Fuel hydraulic hose, oil tank, Shantou, Sheng Shanju, oil and other shoes.

Foreign mainly for aviation, automotive, printing, textile and machinery manufacturing and so on. Due to the development of NBR modified varieties, the application prospect of nitrile rubber has been expanded. To sum up the main play: the manufacture of Rao Shan Shan, fuel tubing, oil limbs, oil seals, fuel pipes, oil-resistant rubber with the contact with the Shan and other products. Nitrile rubber and PVC, cool acid resin has a good compatibility, it is often blended with resin for material modification. Often use PVC to improve the processing performance and impact resistance; the use of desalted resin to obtain the miscellaneous material, the manufacture of asphalt mixed with the flow of materials.

Nitrile rubber is mainly used in the production of oil-resistant products, such as oil pipe, tape, rubber diaphragm and large oil bag, etc., commonly used in the production of various types of oil-resistant molded products, such as O-ring, oil seal, cup, diaphragm, , Hoses, seals, foam, etc., but also for the production of plastic and wear parts.