Continental uses super fast PBT resin for contactless position sensor housing

  • 30% more resin flow compared to standard PBT
  • Energy savings due reduced melt temperatures and injection pressures
  • Applications: electrical and electronic

In order to enhance material flow and shorten cycle times, tyre and auto components supplier Continental Automotive is using a particularly fast and easy-flowing PBT grade to manufacture a series of thermal covers. The housing is used to protect a delicate sensor module controlling the engine thermal management system.

sensor housing from PBT

The contactless automotive position sensor housing is made from DuPont Crastin SF PBT (source: DuPont)

30% more resin flow compared to standard PBT

Crastin Super Fast PBT of DuPont can be used as a direct drop-in replacement for standard PBT on existing injection-moulding machines. It also enables moulders to switch to reduced machine size due to its efficiency at lower filling pressures, offering as much as 30 percent more resin flow compared to standard PBT. This enhanced processing performance enables reduced part thickness, lighter weight and greater complexity in many electrical and electronic applications including connector systems, automotive sensors, relays, control units, coil formers, switches and solenoids. In addition, the very low moisture pick up of Crastin versus polyamide traditionally used for such parts significantly reduces the problem of moisture degradation of encapsulated electrical devices.

“Crastin SK615SF PBT polymer is used by Continental as the material of choice to manufacture thermal cover applications effectively, thanks to easier mould filling and shorter cycle times versus standard PBT GF30,” said Régis Sarrahy, senior technical expert – injection moulding technology, Continental Automotive France SAS.

Energy savings due reduced melt temperatures and injection pressures

Injection moulders can also save on energy consumption because the resin can be injected at reduced melt temperatures and injection pressures than standard PBT grades. Crastin SF is available in a non-reinforced grade and also two 15 percent and 30 percent glass reinforced grades in natural and black. The black grades are laser markable, enabling permanent marking of product, brand and specification details, and reduced risk of counterfeiting.


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