China Scratch Mat

At present, most foreign oil seal lip pieces adopt moulded threaded type, while domestically, the tued threaded type is basically adopted.. However, due to its complex structure, large pressing force and low life span, it is rarely used. By tuing the thread on the end surface, the follow-up type of the shaft is improved, so that the sealing performance, especially the static sealing, can be greatly improved.    This kind of oil seal was developed in the 1980s and is called the first Five-generation products. The second generation is Japan's Arai company invented a paste type seal, which is to paste a layer of PTFE film on the side of the original rubber sealing lip to improve the rubber sealing performance. However, due to the complex bonding process and high cost, the performance is improved. Not many and cannot be widely adopted. Until 1975, the American Mather company first proposed a wide lip structure of PTFE seal, called the fourth generation product, that is, the PTFE material is first pressed into a circular sheet, then pulled into a ho shape, and then clamped in the metal.      In the shell, there is a layer of rubber elastic sheet in the middle. Because PTFE has high self-lubricating properties, the lips are not easy to bu out. It uses the function of the thread groove to make a layer of oil film on the shaft surface receive the thrust of the thread groove, thereby preventing the oil film from leaking outward.PTFE was first used in the military industry and was not used for static sealing elements until the 1950s.    The seal of this new structure is obviously different from the previous Gas Top Protectorsrubber seals, not only the structure is simple, no coil spring is needed, and the contact area with the shaft is wide, generally 3~4mm. However, the inner wall of the lip of this type of seal is smooth and the oil sealing effect is not good. Therefore, a dynamic seal with a 'reverse-r,Gas Top Protectors ...ادامه مطلب

PTFE anti-corrosion products can replace a large number of alloy material products, increase the working capacity of equipment, and reduce downtime and maintenance. In the wave of adopting new technologies and new materials to develop new anti-corrosion products, PTFE anti-corrosion products stand out and develop rapidly. Plastics were first used in our country as polytetrafluoroethylene, followed by fluoroplastics such as polytetrafluoroethylene, polytrifluoroethylene, and polyperfluoroethylene, as well as thermoplastics such as polyethylene, polypropylene, and ABS. It can withstand almost all commonly used strong corrosive and oxidizing chemicals. Through the research of processing and molding technology, the application of PTFE anti-corrosion products in industry has become more and more extensive. With the advancement of science and technology, the development of traditional anti-corrosion equipment made of non-metallic materials has become more and more perfect, and new types of anti-corrosion non-metal materials are constantly emerging. It also has the characteristics of high temperature resistance, so it is an ideal anti-corrosion material. Polytetrafluoroethylene (PTFE for short) has a high degree of chemical stability. The raw materials involved include various gases, liquids, and solids. The physical properties are vastly different and require various types of production equipment. After that, people began to explore the use of non-metal resources to replace metals. In the case of underdeveloped technology, people always look for anti-corrosion agents in metals. However, these devices are often expensive and cannot solve a large number of corrosion problems.Chemicalproduction plants are carried out under certain temperature and pressure conditions, and the process requirements are strict. It is a corrosion-resistant product with ptfe coated fiberglass adhesive tape Manufacturers great development potential. However, the equipment in contact with ,ptfe coated fiberglass adhesive tape Manufacturers ...ادامه مطلب