NBR has good oil resistance, EPDM is poor in oil resistance and not durable, but it can resist aging and heat. Generally, EPDM is mostly used for water pipes and over steam; EPDM is better in friction resistance.
1. Nitrile rubber NBR is a polar unsaturated carbon chain rubber, which is copolymerized from acrylonitrile and butadiene. Depending on the content of acrylonitrile from low to high, the oil resistance is enhanced, but the cold resistance is reduced.
Oil resistance is the biggest feature of NBR nitrile rubber, which has good resistance to petroleum-based oils and non-polar solvents, but poor resistance to polar oils and polar solvents.
1. Good antistatic property;
2. Poor ozone resistance;
3. It has good compatibility with polar materials, such as polyvinyl chloride (PVC), polyoxymethylene (POM), nylon, and can be made into rubber and plastic materials.
4. The operating temperature range of ordinary nitrile rubber: -20°C ~ 120°C, and the low temperature resistant varieties can be lower than -50°C;
2. Ethylene-propylene rubber uses ethylene and propylene as synthetic raw materials, and can be divided into binary ethylene-propylene rubber (EPM) and tertiary ethylene-propylene rubber (EPDM).
Properties of ethylene propylene rubber:
1. Ozone aging resistance
2. Weather resistance
3. Heat resistance
The above three properties are the best in general rubber. There are also the following properties
4. Excellent water resistance, superheat resistance and water vapor resistance;
5. Excellent chemical resistance;
(Because of the chemical stability and non-polarity of ethylene-propylene rubber itself, it does not chemically react with most chemicals, it is incompatible or has little compatibility with polar substances, and it is resistant to alcohol, acid, strong alkali, oxidizing agents, washing agents, animal and vegetable oils, ketones, etc.)
NBR is softer, EPDM is slightly harder and has a different taste
1. Rubber general points
(1) General rubber: such as NR/BR/SBR/EPDM
(2) Special rubber: such as SR/FPM/CIIR/HNBR/CSM 2.
Nitrile rubber NBR has good oil resistance, commonly known as oil-proof rubber, and is often used as an oil seal.
Natural rubber NR has good elasticity and good overall performance, but poor cold resistance and alkali resistance. Often used as car tires
Styrene Butadiene Rubber SBR The cheapest rubber in the world, used as a pad
EPDM has good corrosion resistance and good insulation, and can be used as wear-resistant materials or high-voltage electrical materials
Neoprene CR has good wear resistance and can be used as a cushion Chlorosulfonated polyethylene CSM has good cold resistance
Polytetrafluoroethylene PTFE
Plastic king, excellent acid and alkali resistance, can withstand hydrofluoric acid. It has a wide range of uses and can be used as a pipeline for corrosive liquids.
Hebei CONQI VEHICLE FITTINGS Co., Ltd. is a company dedicated to produce and distribute of auto rubber hose, EPDM hose, food grade hose and pvc hose etc with rich production experience, advanced production technology and a complete and scientific quality management system. In 2009, the company completed a total industrial output value of 10.01 million yuan and completed a warehouse tax of 250, 000 yuan. All of them are matched with more than 30 domestic OEMs such as Jinlong, Yutong, Ankai, and Zhongtong, and with international branches of Volvo and India, New Zealand, Thailand, Taiwan, Poland, Israel, Britain, Egypt, Spain, Turkey, Brazil, Singapore, Germany and more than 20 countries and regions have obtained supporting facilities. Adhering to the tenet of “continuous improvement , excellence, excellent quality, and customer satisfaction”, we keenly capture the latest international technology and product information, constantly design and develop new products, and provide customers .
Post time: Mar-24-2023