1. Low density and high filling
The density of ethylene propylene rubber is a kind of lower rubber, and its density is 0.87. In addition, a large amount of oil can be filled and fillers can be added, so the cost of rubber products can be reduced, and the disadvantage of high price of ethylene-propylene rubber raw rubber can be made up for. For ethylene-propylene rubber with high Mooney value, the physical and mechanical energy can be reduced after high filling. not big.
2. Aging resistance
Ethylene-propylene rubber has excellent weather resistance, ozone resistance, heat resistance, acid and alkali resistance, water vapor resistance, color stability, electrical properties, oil filling and room temperature fluidity. Ethylene-propylene rubber products can be used for a long time at 120°C, and can be used temporarily or intermittently at 150-200°C. Adding suitable anti-aging agent can increase its service temperature. EPDM rubber crosslinked with peroxide can be used under harsh conditions. Under the conditions of ozone concentration of 50pphm and stretching of 30%, EPDM rubber can reach more than 150h without cracking.
3. Corrosion resistance
Due to the lack of polarity and low degree of unsaturation of ethylene-propylene rubber, it has good resistance to various polar chemicals such as alcohols, acids, alkalis, oxidants, refrigerants, detergents, animal and vegetable oils, ketones and fats, etc. ; But in aliphatic and aromatic solvents (such as gasoline, benzene, etc.) and poor stability in mineral oil. The performance will also decline under the long-term action of concentrated acid.
4. Water vapor resistance
Ethylene-propylene rubber has excellent water vapor resistance and is estimated to be superior to its heat resistance. In superheated steam at 230°C, there is no change in appearance after nearly 100 hours. Under the same conditions, fluororubber, silicone rubber, fluorosilicone rubber, butyl rubber, nitrile rubber, and natural rubber will experience obvious deterioration in appearance after a relatively short period of time.
5. Resistance to superheated water
Ethylene-propylene rubber also has better resistance to superheated water, but is closely related to all vulcanization systems. The ethylene-propylene rubber with dimorpholine disulfide and TMTD as the vulcanization system has little change in mechanical properties after being soaked in superheated water at 125°C for 15 months, and the volume expansion rate is only 0.3%.
6. Electrical properties
Ethylene-propylene rubber has excellent electrical insulation properties and corona resistance, and its electrical properties are superior to or close to those of styrene-butadiene rubber, chlorosulfonated polyethylene, polyethylene and cross-linked polyethylene.
7. Elasticity
Since there are no polar substituents in the molecular structure of ethylene-propylene rubber, the cohesive energy of the molecule is low, and the molecular chain can maintain flexibility in a wide range, second only to natural rubber and butadiene rubber, and can still maintain at low temperature.
8. Adhesiveness
Due to the lack of active groups in the molecular structure of ethylene-propylene rubber, the cohesive energy is low, and the rubber is easy to bloom, and the self-adhesiveness and mutual adhesion are very poor.
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-17-2023