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Victrex Polymer Solutions announces the addition of a thermoplastic compound to its range of Victrex WG premium wear grade polymers for the automotive and processing equipment industries.

The Paek-based compound, Victrex WG102, was developed in response to requests from engineers and OEMs for improved reliability, reduced failure rates and increased energy efficiency.

Phil Pritchard, product manager at Victrex Polymer Solutions, said: ‘Our aim in developing Victrex WG premium wear grades was to allow customers to produce lower cost, lighter weight parts with increased service life compared to parts made from metals, polyimide [PI] and polyamide-imide [PAI].

‘Victrex WG polymers have improved wear resistance and reduced coefficient of friction when compared to PI and PAI.

‘The new Victrex WG102 polymer is designed for higher-temperature tribological applications for high strength and stiffness.

‘It offers 25 to 75 per cent lower wear rates and a reduced, stable, coefficient of friction to meet customer requirements for wear at higher speed and load application performance in challenging thermal and chemical environments,’ he added.

Victrex WG102 offers dimensional and thermal stability up to and beyond 300C (572F).

It is chemically resistant to aggressive environments including service fluids and contains no polytetrafluoroethylene (PTFE).

‘In terms of wear resistance, with a 50 per cent lower coefficient of friction, Victrex WG polymers produce less drag and frictional heating, so parts run cooler and last longer over a wider range of pressure and velocity conditions than PI and PAI wear grades,’ said Pritchard.

Another area where Victrex WG polymers can outperform PI and PAI is compressive load, which can lead to polymer creep resulting in dimensional changes.

‘Victrex WG polymers have higher retention of mechanical properties at elevated temperatures and consistent performance over a wide temperature range,’ said Pritchard.

‘Engineers can design a component in Victrex WG102 for significantly higher loads compared to the same component in other polymers,’ he added.

Victrex WG polymers extend the fit of Victrex Peek polymer to new application areas ranging from full plastic wear bushings to composite bushings and vane tips in vacuum pumps.

‘One advantage of Victrex WG polymer-based thrust washers, wear bushings and seals is the polymer’s excellent melt flow that allows thin-walled intricate component design and the ability to consolidate complex parts, to reduce part costs,’ said Pritchard.

‘Smaller components result in more efficient heat transfer through the plastic component into the metal counterface or to the lubricant,’ he added.

Victrex WG grades are also melt processable with standard injection moulding equipment and require no post processing and machining, meeting the need for economical processing and lighter weight components.

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