Filled products containing glass fibers are suitable for sintering in nitrogen

Filled products containing glass fibers are suitable for sintering in nitrogen. . has developed rapidly in chemical anti-corrosion.. The sintering process of the filled product is the same as that of pure PTFE. Commonly used fillers according to these requirements are: glass fiber, carbon fiber, graphite, quartz sand, molybdenum disulfide, amorphous carbon, calcium fluoride, bronze powder, ceramics, polyimide, polyphenylene, polyparahydroxyformate, etc. Improve the pressure resistance, wear resistance, cold flow resistance, heat resistance, dimensional stability, etc.

Solvent mixing, the solvent is acetone or methanol, suitable for glass fiber filled PTFE. New application areas of PTFE. But for filled products containing MoS2, it is required to sinter in air at 360°C or in nitrogen at 380°C. Main applications It is used as oil-free lubrication bearings, bearing pads, piston rings, machine tool guides, etc. in the machinery industry. PTFE filled in foreign countries is generally completed by PTFE resin production plants, such as HosTaflonTF4000 series and HosTaflonTF3000 series of Hoechst in Germany And the HosTaflon2000 series.

In our country, because PTFE BBQ Mesh Mats PTFE resin production technology lags behind processing technology, PTFE filling technology is completed in product processing plants. of PTFE by adding different fillers such as inorganic, metal, and polymer to the PTFE resin. Compared with pure PTFE, the filled products have 5-10 times higher pressure resistance, 1000 times higher wear resistance, 80% lower linear expansion coefficient, 5 times higher thermal conductivity, and reduced volume resistance and surface resistance.

In recent years, the application of filled PTFE as the lining of pipes, valves, pumps, etc.Among polytetrafluoroethylene (PTFE) products, filled polytetrafluoroethylene (PTFE) products are the one with the largest output. There are currently three mixing methods used to fill PTFE: (1) The dry mixing process requires the mixing device to be fast, uniform and free of dead ends, and is suitable for products with general requirements.

The molding pressure of the filled PTFE product depends on the volume ratio of the filler in the PTFE, such as: 250 bar with 5% filler; 350 bar with 6%-10% filler; 500 bar with 12%-25% filler ; With more than 25% filler molding pressure 700 bar. Filled PTFE products generally adopt a compression molding process: the quality of filled PTFE products mainly depends on the choice of resin filler, the design of the formula, the uniformity of material mixing and other factors. (3) Wet mixing: The products formed by this process have high mechanical strength, low wear and good corrosion resistance