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This post was last edited by Xin Ruifang Xiao on 2025-6-10 13:09. I believe that through sharing in previous issues, everyone should be familiar with polytetrafluoroethylene (English name Polytetrafluoroethylene, English abbreviation PTFE). It has the characteristics of corrosion resistance, high temperature resistance, almost insoluble in all solvents, and extremely low friction coefficient, so it can be used as a sealing material. However, to maintain a good sealing effect, the sealing material also needs to have good filling performance to fill all the gaps in the sealing interface, and it needs to be strong enough to withstand the pressure of the medium. As a high molecular polymer, PTFE has a relative molecular mass of approximately 100,000 to 500,000 grams/mol. Under certain temperatures and pressures, traditional PTFE gaskets will creep and relax and lose their original thickness, easily causing media leakage and rapid sealing failure. Stress conditions of flange gaskets In order to minimize the creep cold flow problem of traditional PTFE gaskets, rPTFE (Restructured Filled PTFE) was born. The material undergoes a lamination process before sintering to form a highly fibrous structure. At the same time, in order to meet the needs of chemical services, mineral or artificial fillers are added for modification, such as barite, mineral and silica, barium sulfate or hollow glass microspheres. This makes the creep of rPTFE sealing materials both at room temperature and high temperature. * * Reduced, which means better dimensional stability. Just like the XRFLON series sealing materials developed and produced by Chengdu Xinrui Fangxiao Technology Co., Ltd. Because of its excellent sealing performance, rPTFE is widely used in chemical, petroleum, pharmaceutical, food processing and other fields. Since PTFE and inorganic fillers are easy to purchase on the market, and the color of rPTFE modified materials is easy to imitate, many peers claim that their products are rPTFE. So how to distinguish rPTFE on the market? The answer will be revealed to you in the next issue. See you next time!