Tribological performance of natural resin urushi containing PTFE

The “Urushi lacquer” is a natural resin material and, it has been used since ancient times as a hard coating material of Japanese tableware and Japanese armour. In this paper, friction and wear performance of the urushi lacquer and urushi lacquer with the addition of PTFE has been experimentally investigated. Experiments have been carried out under the dry conditions using a ring-on-plate testing apparatus. It was consequently found that the urushi lacquer containing PTFE has comparable friction properties and superior wear properties compared with the pure PTFE.