耐油橡膠接頭的超能性能分析
耐油橡膠接頭是在一般橡膠接頭的基礎上研發(fā)的特殊材質橡膠接頭，這種橡膠接頭一般采用丁晴橡膠，丁腈橡膠接頭是由丁二烯和丙烯腈經乳液聚合法制得的，丁腈橡膠主要采用低溫乳液聚合法生產，耐油性極好，耐磨性較高，耐熱性較好，粘接力強。其缺點是耐低溫性差、耐臭氧性差，電性能低劣，彈性稍低。
丁腈膠最大的用途是生產耐油膠管及阻燃輸送帶，其消耗量約占總消費量的50%;其次是密封制品，其中約半數(shù)為汽車密封制品;在電線電纜、膠粘劑、印刷和箱包制品等方面也有應用。另外，丁腈膠與其他材料共混改性成為目前研究熱點。利用動態(tài)硫化技術等技術，可以制備丁腈膠/聚氯乙烯、丁腈膠/聚丙烯、丁腈膠/乙丙膠、丁腈膠/聚苯乙烯、丁腈膠/氯磺化聚乙烯、丁腈膠/聚酰胺、丁腈膠/丁基膠等共混產品，其中丁腈膠/聚氯乙烯共混膠用途最廣泛，主要應用于電線電纜行業(yè)。隨著通訊業(yè)快速發(fā)展，在海底電纜領域對乙丙膠/聚丙烯有較強競爭力。目前國內有近萬家電線電纜企業(yè)，每年丁腈膠/聚氯乙烯消耗量很大。另外，該共混膠還可以用于油管和燃油管外層膠、汽車防水密封件和模壓零件、發(fā)泡絕熱層、膠圈。
丁腈橡膠接頭由普林森自主開發(fā)的耐高溫耐油污橡膠接頭，經過長期的實驗測試才推向市場，所以我們的高溫橡膠接頭無論在任何環(huán)境下使用都不會發(fā)生脫膠，起翹的現(xiàn)象，目前廣泛用于蒸汽管道，熱水管道，高溫粉料管道。 各種耐油橡膠接頭用耐油橡膠的配合體系：
1.硫化體系：
總的來說，提高交聯(lián)密度可以改善硫化膠的耐油性。在氧化燃油中，用過氧化物或半有效硫化體系硫化的丁晴橡膠，比硫磺硫化的耐油性好。過氧化物硫化體系硫化的丁晴橡膠，在40度穩(wěn)定性最好，在125度的氧化燃油中則不理想。而用氧化鎘和給硫體系統(tǒng)硫化的丁晴橡膠，在125度的氧化燃油中耐長期熱老化性能較好。
2.填充體系和增塑劑：
增加碳黑和白碳黑可以提高耐油性。軟化劑應該選用不易被油類抽出的軟化劑。最好選用低分子聚合物，如低分子聚乙烯，氧化聚乙烯，聚酯類增塑劑和液體橡膠等。極性大，分子量大的軟化劑或增塑劑，對耐油性有利。
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The performance analysis of super oil resistant rubber joint
Oil resistant rubber joint is in general rubber joint based on the research and development of special material of rubber joints, the rubber joint is commonly used NBR rubber, nitrile rubber joint is from butadiene and acrylonitrile by emulsion polymerization method of, nitrile rubber mainly uses the low-temperature emulsion polymerization production, excellent oil resistance, high wear resistance, heat resistance is good, strong adhesion. The disadvantage is that low temperature tolerance, poor resistance to ozone, poor electrical performance, low elasticity.
The best use of nitrile rubber is producing high oil hose and flame retardant conveyor belt, consumption accounts for about 50% of the total consumption; the second is sealing products, about half of them for automotive sealing products; in the wire and cable, adhesive, printing and bag products is also applied. In addition, nitrile rubber and other materials have become a hot blending modification. The use of dynamic vulcanization technology, preparation of NBR / PVC, nitrile rubber / polypropylene, acrylonitrile butadiene rubber / EPDM rubber, nitrile rubber / polystyrene, NBR / chlorosulfonated polyethylene, butadiene nitrile rubber / polyamide, nitrile rubber / butyl rubber blends products, which NBR / poly vinyl chloride blends uses the most widely, mainly used in wire and cable industry. With the rapid development of the communications industry, in the field of submarine cable of EPDM / PP with strong competitiveness. At present, there are nearly 10000 wire and cable business, the annual consumption of NBR / pvc. In addition, the blends can tube outer glue, the car waterproof sealing parts and molding parts, foam insulation layer, aprons for hose and fuel.
Nitrile rubber joints by Pu Sen independently developed high temperature resistant oil resistant rubber joints, through the long-term test to push the market, so our high temperature rubber joint no matter in any environment is not going to happen, degumming, become warped phenomenon, is currently widely used in steam pipe, water pipe, powder at high temperature pipeline. Coordination system of oil resistant rubber for all kinds of oil resistant rubber joints:
1 curing system:
In general, increasing the crosslinking density can improve the oil resistance of vulcanized rubber. In the oxidation of fuel, with peroxide or semi efficient curing system of vulcanized rubber rubber, better than sulfur vulcanization of good oil resistance. Peroxide curing system curing rubber rubber, the best in 40 degrees, in the 125 degree of oxidation of fuel is not ideal. In the 125 degree of oxidation, the thermal aging property of the rubber, which is used in the oxidation of cadmium and sulfur system, is better.
2 filling system and plasticizer:
Increase of carbon black and white carbon black can improve oil resistance. Softener should be used is not easy to be out of the oil softener. It is best to use low molecular weight polymers, such as low molecular weight polyethylene, polyethylene oxide, polyester plasticizer and liquid rubber. Very large, large molecular weight softener or plasticizer, beneficial to oil resistance.
The picture and text provided by the Shanghai Songjiang group. Have questions, please contact 021-60547771
This picture, written by Shanghai Songjiang group of high temperature resistant rubber joints http://www.shnxxjjt.com/xjrxjt/
