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Datwyler strengthens R&D capabilities of Electrically and Thermally Conductive and Electromagnetic Interference (EMI) Shielding Materials (ETEMI™)

Datwyler is expanding its in-house capabilities through a focus on Electrically and Thermally Conductive and Electromagnetic Interference (EMI) Shielding Materials (ETEMI™). Project ETEMI™ was launched in 2020 to address challenges in applications related to new mobility and beyond, with a material development scope covering conventional elastomers, liquid silicon rubber (LSR) and thermoplastics. The aim is to ensure that customers diversifying towards hybrid and battery electric vehicles are able to realize the full potential of system critical sealing components with enhanced functionality – such as sensing seal integrity or keeping electrical charge locally in a battery gasket, for example.


Ultimately, ETEMI™ will be the catalyst for the creation of a material matrix whereby electrical and thermal conductivity and EMI shielding can be coupled and decoupled to suit a wide variety of applications. The thermal management of an electric vehicle battery could be managed in part by its sealing material, for example, while EMI shielding could likewise be introduced via sealing technology to safeguard components such as sensors and critical control units from environmental effects as well as electromagnetic interference.


Electrical conductivity for discharging and antistatic materials is also possible via sealing technology, and there are many examples of this combined functionality enabling certain components to be removed – such as metal conductors – thus delivering weight reduction benefits. Overall, the key objective is to balance the ability to provide a high-performance seal with the need to meet the many additional requirements arising from electrification.

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