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Electrical Insulation

Features of Crastin®

Crastin® for safe electrical applications

Aside from its impressive versatility as a polymer material, which is available in FDA and EU approved grades for food and cosmetics applications, Crastin® meets the most stringent electrical insulation standards.

Many of our polymer grades are used in electrical applications as most chemistries are naturally electrical insulators. Polymers provide safety to ensure the user of the product is not at risk of an electrical shock. So where do you start in terms of isolating a polymer grade that’s the best for your application? Many factors need to be taken into consideration when making a product selection, including:

  • The voltage of the application
  • Operating temperature of the product
  • Flame retardancy needs
  • Product colour
  • Mechanical loads on the product
  • Approvals needed (UL, IEC….)
  • Chemical resistance
  • Thermal ageing requirements

Even with these areas of focus, you could still be left with quite a few chemistries  for consideration, so here we’ll explain why Crastin® PBT may provide the competitive edge.

Crastin Electrical

Electrical relays – an electrical switch to either make or break circuits needs best-in-class electrical insulation properties.

Crastin electrical

Crastin® – electrical insulation at temperature

When looking at the electrical data on our polymer grade technical data sheets, test data like Current Tracking Index (CTI) or the dielectric strength data is taken into consideration.

The dielectric strength is an indication of the polymer's resistance to an electrical voltage where a plastic test piece is put between two electrodes and a voltage is applied. The voltage is increased until the natural insulation properties of the polymer are broken down and destroyed and that voltage is then recorded.

At room temperature, polyamide (nylon) chemistries can perform very well with recorded data up and around 30kV/mm with similar results for our Crastin® PBT. However, when products are operating at higher temperatures, it's very important to note that with polyamide based chemistries, the performance can rapidly decrease.

Electric strength vs temperature

Crastin electrical

Other features of Crastin®

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