抄録
To obtain a polyacetal with high strength and rigidity, we should select a composite polyacetal filled with, for example, carbon fibers. However, this may not be true in the case when this kind of composite polyacetal is used in water. That is, it is considered that the sliding Characteristics might decrease because water enters into the bonding space between carbon fibers and polyacetal and between carbon fibers themselves. In this study, operating tests of a polyacetal gear filled with carbon fibers in water and with water drops were performed and the wear of the gear and the change of the tooth profile were determined. By comparing these results with those of an unfilled polyacetal gear, we investigated the usefulness of polyacetal gears filled with carbon fibers in water or humid environments.
