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...

The reactivity of these compounds is very high. The principle is: Na transfers the outermost electrons to the empty orbital of naphthalene to form anionic radicals; then forms an ion pair with Na+, releasing a large amount of resonance energy, and forming a mixed solution of dark green metal organic compounds.064nm) is greater than that of hydrogen atoms (0. The helical conformation just surrounds the PTFE's carbon chain skeleton, which is vulnerable to chemical attack, forming a tight and complete;fluorinated; protective layer, so that the PTFE main chain is not attacked by any exteal reagents, so that PTFE has other materials Unmatched solvent resistance, chemical stability, and low cohesi...