Hastings, UK – Electronics manufacturer Wilson Process Systems (WPS) has added a new red polyurethane casting material to its range of products used for resin encapsulation.
The company processes eighteen variants of printed circuit board (PCB) using black polyurethane, clear PU and grey silicone, using some 30 tonnes of resin per year. WPS says it has more than 20 000 units a month going through its resin encapsulation process.
The company noted that customers have requested a more cost effective resin. The process engineering team at WPS has tested and accepted a Stobicast £780 polyurethane material from Stockmeier Urethanes.
Stobicast £780 carries a “prestigious” rating from independent testing group Underwriters Laboratories (UL), Tim Wilson, joint MD of WPS, said. It meets UL’s 94 V-0 ‘self-extinguishing’ rating together with an approved relative temperature index, RTI, for both mechanical and electrical of 130°C.
The material also fulfils the requirements of the Household Appliances Standard IEC 60 335. “We’re very happy with the material and will be using £780 for specific encapsulation work from now on,” Wilson said.
The new material is a distinctive red in colour, making it easy to identify the old from the new, WPS said. As a result of increasing customer demand for encapsulation, WPS’s production team is planning to use even greater volumes of the new material through 2012. “We expect to get through 3 tonnes this year,” Wilson claims.
WPS has also invested in a new static-mix, gear-pump mixing system from specialists Liquid Control Ltd to mix and dispense the red UL-approved resin.