Recently, a domestic new material company announced the successful development of a new generation of expanded polytetrafluoroethylene (ePTFE) sealing material, with its temperature resistance exceeding 320 ℃ for the first time, setting a new industry record. This material utilizes nanoscale microporous structure control technology to significantly improve sealing stability in high-temperature scenarios while maintaining excellent chemical inertness. It can be widely used in extreme working conditions such as petrochemicals and heat exchangers.
According to the head of the R&D team, this technological breakthrough is due to the optimization of the directional stretching process for ePTFE node fibers, which enables the material to maintain a rebound performance of over 85% at high temperatures of 400 ℃. Compared with traditional rubber or metal seals, the new generation of ePTFE products have significant advantages in corrosion resistance, creep resistance, and service life, and have been tested and certified by multiple international chemical giants.