袁春凤 (Tiffany)

3.ECO is a series of heat resistant and oil resistant rubber, which can be used at various -40~150 temperatures. The main features are weathering resistance and air tightness, and low compression deformation. It is especially suitable for processing various kinds of membranes in automobile lemon glue products, and also for 0 rings, gaskets and hose products. At present, there are more than 10,000 tons of global strictness, mainly produced by Ruiweng and Cao Da Osaka, China's organic shopping in Wuhan, Hebei Province, etc. are also producing, more complete types of cities. ECO is the most commonly used chlorinated ether crop glue, which is prepared by copolymerization of propylene oxide with ethylene oxide. The representative brands are ECO2 421 (content 24%) and Hydrin 200. The unsaturated ternary polymer can be obtained by adding allyl glycidyl glycidyl monomer 3. The representative brands are ECO 1131 (hydrogen content 11%) and Hydrin 400. A binary copolymer of deuterated propylene oxide and allyl glycidyl ether without cycloethylene is called GCO, which represents GC 00621 (6% chlorine content). 1100, the trimer is GCo0631 (6% of the uterine chloride), Gechron2100, and the four polymer GCO0641 (chlorine content 6%) with epoxy propane, and the properties of Gechron3100 are similar, but the vulcanization system is different. A monomer-homopolymer rubber called CO, also known as cyclohexane rubber, represents CO3611 (36% chlorine), Hydrin 100. Because of insufficient strength and poor processability of the acer, it is mostly used in blending wells with NBR, CR, ACM and FKM to improve the performance. Homopolymer of propylene oxide called PO, also known as propylene oxide rubber, allyl glycidyl glycidyl is introduced into the unsaturated GPO, the representative product is Parel. In addition to their oil resistance and higher heat resistance near NBR, they also have good elasticity and better aging resistance in stinky steamer, especially at -65 C, which is most suitable for use in dynamic low humidity. Thanks for the help of the Chongqing Feilong Jiangli Auto Parts’ Technical dept. And welcome to share the idea with us ([email protected]). Thanks https://s1.ax1x.com/2018/07/21/P8cDzV.jpg

2.ACM is a copolymer of ethyl lactone with 2-chloroethyl ethyl or butylene propionate with acrylonitrile. The former is called ACM and the latter is called ANM. At present, the global production and sales are about more than 100 thousand tons, more than 80% are used in automobile rubber products, so it is also called automobile rubber. The 3%~5%ACM of automobile rubber is a saturated type rubber. In order to make it cross linking, it usually adds third monomers of monomer which can provide vulcanization points during polymerization, forming active chlorine, epoxy, basic type and diene. Type (ENB) and other types. The earliest production of ACM was the ancient total Lich chemistry, which was later extended to Japanese oil seals, Rui, JSR and so on. There were 10 kinds of cars sold in Japan and more than 30 kinds of commodity brands with standard type (AR31, 51), heat resistant (AR100, 110), cold type (AR210, 200), and super cold and easy additive (4052EP, 4053EP) and so on, to choose A according to specific use. The pre oil property of CM is equivalent to NBR, and the heat resistance is better than NBR. The long-term use is 170 C, and the short term can reach 210 "C. the automobile seal can drive 15~20 million km, about 1.5~2.0 times of NBR, especially in the automobile oil seal. Now, the use of 2/3 is to eliminate the oil seal. Therefore, we often call it the car oil seal. The biggest drawback of automobile oil seal rubber ACM is poor cold resistance, far less than NBR. The heat resistance of ACM is only -15 C, and the standard type is only -20 C. However, in recent years, after continuous improvement, it has been able to reach -30 C and super cold resistance type can even reach -40 C. Another disadvantage is poor workability, mixing, calendering and extrusion. Besides the alkene type ACM, it can not be vulcanized vulcanized like ordinary rubber, and some even undergo two times of vulcanization. However, due to the low price of FKM, which is far more than heat resistant oil, it is still being ignored as the above disadvantages of improving ACM. In recent years, there has been a AEM called ethylene methyl acrylate rubber, with DuPont's Vamac. It is a three - copolymer of ethylene, methyl acrylate and organic carboxylic acid. It is not only good in oil resistance, but also high in elongation of rubber after oil immersion. It is also used to produce power steering gum, high hysteresis plug protection sleeve and automatic bellows. In addition, there are also acrylic rubber, 1F4[(1,1 two hydrogen containing butyl acrylic acid) 2F4[poly (3- Perfluoromethoxy -1,1- two hydrogen fluoride acrylate)) and other products, and is developed by the 3M company. Because of their 50% fluorine content, they are also regarded as the first rubber, the low heat resistance is higher than ACM, the oil resistance is better than the NBR, the low temperature resistance and flexion resistance of 2F4 are better than 1F4. In recent years, it has been expanded to the vehicle in the military fields such as rockets and aircraft.China's production of ACM, the standard level of Jilin oil chemical Super AR-01, AR-03, Suining Qinglong AR-100, AR-200; cold class SuperAR-02, AR-04, AR-300, AR-400. Thanks for the help of the Chongqing Feilong Jiangli Auto Parts’ Technical dept. And welcome to share the idea with us ([email protected]). Thanks https://s1.ax1x.com/2018/07/21/P8cDzV.jpg

Oil resistant rubber, including NBR, ACM, ECO and other synthetic rubber, is an important raw material for automobile rubber flexion, accounting for about 15%~20%. In recent years, the oil like stocks are not new and the application range is expanding rapidly. 1.NBR is the most widely used and widely used type in the field of rubber and rubber, which accounts for more than 80% of the rain oil rubbers used in automobiles. It has very good ketone oil properties, and in the environment of four categories of gasoline and Chai run, the use of Shou 6 can reach 10-20 km. Generally working at -20~+120 C, the same energy is up to 5~10 years, the lowest humidity is -30~-40 C, and the maximum can reach 130~140 C. However, oil and cold resistance, oil resistance and oxygen aging often have the contradiction between the two laws, and the global NBR enterprises have reached more than 20, the annual output is more than 300 thousand T, and the strict species as many as 30 species totalling 300 Above production brand, main enterprise Lansheng and Rui lie occupied about 2/3, he has Jin, Xi Bo Er, JSR and so on. In order to make up for the difference in performance between NBR and meet the requirements of different aspects, the NBR produced nowadays is based on oil level.(the size of acrylonitrile) is divided into five types: low, medium, middle, high, high and high. The majority of the vehicles are middle and high, that is, NBR26 and 3 account for more than 4/5, which are mainly made of automobile hose, each and seal, especially oil seal and O ring. NBR is a copolymer of butadiene and propene, and acrylonitrile is from 18-41. In addition to the standard type of NBR17042707 (N41), 3408 (DN214), 3804, and 5007, a variety of easy to be soluble, easy to wear, corrosion resistant, low humidity, aging resistant, and a series of other chemical physics are also developed. Their ratio of stars to stars is expanding in NBR. In addition, there are other forms of NBR, such as liquid NBR, shape NBR, powder NBR, as well as NBR in common viewing form, NBR/PVC blends and so on. (1) Partially cross-linked NBR can be prepared by introducing divinylbenzene into NBR, which can improve the processing performance, easily press out the jade, increase the speed and reduce the deformation. For example, Hycar1042JSRN210S, Krynac810 and so on (2) NBR add carboxylic acid as three of third components.The polymer one to one carboxyl NBR can improve the adhesion of NBR and metal, and further improve the oil resistance, aging resistance, tearing resistance and resistance to damage of the gum. For example, Hycar1072, N34, JSRN632S and so on (3) NBR added a polymerized antioxidant to the polymer to become a part of the main key of the polymer to prevent the loss of the antiaging agent during the use of the product, thus greatly improving the aging resistance and service life of NBR. Such as SRNS351, N541. With special formula, the heat resistance and oil resistance of the NBR are even comparable to (4) NBR D two, acrylonitrile and acrylonitrile mononitrile ester, which can greatly improve the heat resistance and oil resistance of NBR, and use the level of 5 at the working environment of 50 C, which is basically close to the level of ACM). The unsaturated double bond is saturated by hydrogen saturation in the polymerization. Hydrogenated or hydrogenated NBR, also known as high saturation NBR tube, is called HNBR. It completely modifies the traditional NBR and improves it by one grade. It combines oil resistance, heat resistance, cold resistance, aging resistance and high mechanical strength and elongation. Its price is doubled. The work strength can reach -40~150 C, resistance to oil, except the most suitable for engine O ring, tree pad, automobile fuel and run trickle system rubber tube, it has become the main stream of main raw materials of automobile drive belt and brush strip, HNBR has been unique in the field of NBR, and the world's NBR production manufacturers are developing and producing, such as the Zetpol HSN of Japanese reion. Their saturation degree is Therban (HNBR) and A (99.5%), B (98%) and C(95%),CNs were divided into 17% (34% acrylonitrile), 19% (38% acrylonitrile) and 22% (44% acrylonitrile) for different uses. (6) NBR blends with other materials have greatly improved the properties of NBR. In recent years, NBR has been developed into a commercial production brand. NBR/PVC blends can significantly improve the ozone resistance and weathering resistance. Well, the oil resistance, acid and alkali resistance, wear resistance and processing technology have been improved. It has been widely used in the outer coating of automobile tube and the rubber parts of automobile. The blending ratio of NBR/PVC can be from 70/30 to 50/50, and the commercialization grades include NipolDN820, Krynac Nv850 and so on.Two is NBR/EPDM blends (20/30 or 60/40) can improve the heat resistance and aging resistance of NBR, use the temperature to reach -50~150 C, commonly used to manufacture car protection sleeves, tubes, production grades of JSRNE and so on. The three is NBR/DOP blend (100/50), that is, filling the oil by filling the DOP plasticizer at the time of rubber polymerization. It can not only keep the strength of the maple, but also reduce the mixing difficulty, shorten the mixing time and save energy, which is mainly used as the automobile fuel tube. Production brands include Nipol DN224, Hycar1082, krynac843, etc. China's NBR production enterprises include Lanzhou petrochemical, Jilin petrochemical and Zhenjiang South Emperor (Taiwan capital) 3, a total of more than 40 brands. Thanks for the help of the Chongqing Feilong Jiangli Auto Parts’ Technical dept. And welcome to share the idea with us ([email protected]). Thanks https://s1.ax1x.com/2018/07/21/P8cDzV.jpg

Measures to improve the anti cavitation performance of centrifugal pumps First, improving the geometry of the inlet of the impeller 1. use double suction impeller 2. the lower inlet velocity of the impeller 3. enlarging the width of the entrance edge of the blade B 4. the proper selection of the number of blades and the angle of the punching Second, the use of anti cavitation material Generally speaking, the higher the material surface temperature and toughness, the higher the hardness and chemical stability, the better the cavitation resistance of the parts. Third, improve the anti cavitation performance of the pump with the induction wheel The inducer can improve the cavitation performance of the pump before the impeller of the centrifugal pump, and the effect is remarkable. Chongqing Feilong Jiangli Auto Parts welcome you to discuss this topic with us.