The abrasive qualities of man-made fibers, particularly nylon and polyester, and the corrosive characteristics of additives, such as fiber finishes and lubricants, combine to deteriorate yarn contact surfaces. High rotation speed of grooved rollers results in considerable abrasion wear.
Due to the very high rotational speed, the roller has to be made from aluminum, and therefore, the reduction in wear can only be achieved by the deposition of a coating that also must be as light as possible.
