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Polytec TC 437 boron-nitride-filled thermally conductive epoxy from Intertronics is being used by Variohm in a production project for the in-house potting of temperature probes. 

Variohm’s engineers were looking for a potting compound that would give them the best thermal conductivity combined with an extended pot life at room temperature. It also needed to be as free flowing as possible to fill the very small cavities in the Variohm M4- to M10-sized thermistor and thermocouple probes.

The probes can typically work at more than 100°C and can be used in temperatures of 200°C to 300°C, and so high-temperature capability was also a key factor.

Polytec TC 437 cures at room temperature with a two-hour pot life and low viscosity.

Key benefits of product application

  • Ben Moffat, project engineer at Variohm, said that with Polytec the company has about three times the pot life it had before and the bubbles rise to the top, meaning it can essentially do what it wants with it.
  • Intertronics provided a selection of dispensing tips and was helpful in guiding Variohm through the trials process.
  • Polytec TC 437 is now Variohm’s preferred material, particularly for high-performance assemblies.
  • Intertronics supplied bulk quantities of the Polytec TC 437 adhesive in a Variohm green to match the company’s corporate style.
  • The process is manual at present, so providing a material with user-friendly pot life and viscosity has reduced mess and clean-up.

Intertronics

INTERTRONICS supplies a comprehensive range of bonding and protective materials – together with the associated consumables and equipment – to customers in high technology, high performance assembly industries – including electronics, medical device, plastics, optical, automotive, energy, defence and aerospace.

INTERTRONICS supplies a comprehensive range of bonding and protective materials – together with the associated consumables and equipment – to customers in high technology, high performance assembly industries – including electronics, medical device, plastics, optical, automotive, energy, defence and aerospace. The company supplies over 3,000 regular customers, including multinational manufacturing giants, production facilities, specialist design and development businesses, universities, training organisations and government establishments.

adhere is INTERTRONICS’ brand which encompasses its bonding, coating, sealing, encapsulating, potting, masking and gasketing materials, together with the most appropriate equipment and accessories for dispensing and curing them.

Because adhere brings together this proven range of integrated products from selected and trusted partners, INTERTRONICS’ customers have the confidence that everything will work together efficiently and cost-effectively, underpinned by the company’s experience and expert advice.

This advice is an essential element of the programme, and it ensures that customers benefit from the optimal material and process choice for the manufacture, assembly or repair of their products … safeguarding and enhancing performance and integrity and in turn, profitability and reputation.

Also key to customer success and satisfaction are the provision of process implementation and training, ongoing expert technical support and the assurance of highly competent supply chain management.

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