Witcom Engineering Plastics has developed a broad range of lubricated engineering plastic compounds for such applications with what it describes as outstanding wear and friction properties. “We see an increasing demand of low wear and friction compounds. In automobiles, buzzing, squeaks and rattles need to be kept to a minimum, as nowadays they are very noticeable, especially in electric vehicles,” says Bram Willemen, the company’s Business Development Manager for Lubricated Compounds.
Wear resistance has to be considered alongside other mechanical requirements, according to the company. A recent project for a metal/plastic bearing/shaft combination assembly incorporating a component in its Witcom PPS-2014/316 grade illustrates this. The compound contains a proprietary high-performance lubricant system in which the coefficient of linear thermal expansion is adjusted to be in the same range as the metal elements. As a result, the bearing/shaft combination remains within the required tight tolerance field over a temperature range from -40°C to over +200°C.
Read the full article from Compounding World here:
CW February 2021 – Careful selection is the key to defeating wear