Dosage control of protective wax
2022-04-13 15:04:41
The inner tube of the special high-temperature steam hose for steam engines has EPDM rubber, and inner tube silicone rubber, and the inner tube is made of PTFE. The PTFE and silicone rubber materials have good temperature resistance and poor pressure resistance. There is also a special high-temperature steam hose for railway steam engines, which has a high operating temperature and a diameter of 25 mm. With quick connector. Middle steel wire braid, outer skin red. The working pressure is 28 kg, and the bursting pressure is 280 kg. It is divided into steel cord winding and steel wire weaving structure. Litong products have obtained ABS certification from the American Bureau of Shipping. In shipbuilding, infrastructure, machining and manufacturing and other heavy industries, Litong products have developed Hercules series products, which have the characteristics of low bending, high temperature resistance, high pressure resistance, etc. Super Hercules, using hydrogenated butyl Nitrile rubber and Teflon material can withstand high pressure and maintain stability under high temperature, high pressure, acid and alkali conditions, solve the trouble of frequent replacement of wearing parts for customers, and improve work efficiency.
The sandblasting hose will not foam when conveying mud or some wet materials, but the flow rate is very fast when conveying granular materials, especially when the sandblasting hose conveys relatively dry iron powder, rust-removing quartz sand, and pebbles. , the sand generates heat by friction when it flows, but it is not easy to dissipate heat in the sandblasting hose, the inner rubber expands rapidly when heated, and the inner rubber of the sandblasting hose is a non-conductive conductor, the outer layer of glue will not expand, and some hot air inside quickly accumulates It can't be discharged to the middle layer, so the outer rubber is quickly bulged up into several large bags. LT301API 7K series - super wear-resistant acidizing and hydraulic fracturing hose, mainly used in oil drilling/cementing/workover and other operations to transport water-based, oil-based, foam, acid-based and other pressures in a high-pressure environment The internal material is made of ultra-high molecular weight polyethylene (UPE) imported from Germany, which has great chemical stability and wear resistance; the external material is made of wear-resistant and weather-resistant synthetic rubber, which conforms to the international API 7K standard.
Protective wax is a mixture of saturated straight-chain hydrocarbon refined wax and saturated isomerized hydrocarbon microcrystalline wax. When the amount in the rubber compound exceeds its solubility in rubber, it migrates to the surface of rubber products after vulcanization to form a physical protective film, which is effective. Prevent ozone cracking. Chemical antioxidants are often used in acid and alkali resistant hoses. Among them, the solubility of chemical antiozonants in wax is higher than that in rubber, and the migration speed of wax in rubber is faster than that of chemical antiozonants. Diffusion, improve the ozone crack resistance of acid and alkali resistant hoses under dynamic and static conditions. In addition to the FDA certification, the inner rubber of the wine conveying hose needs to have good acid and alkali corrosion resistance. Because the wine contains special substances after fermentation, it is necessary to avoid its reaction with the rubber. In this way, in the process of conveying wine, under the premise that the medium is in contact with the pipe wall, the two will not react. FDA certification makes it use the highest grade.
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