Sabic Expands Portfolio of Film for High-Temperature Dielectric Capacitors
New 7- and 10-Micron Gauges
Sabic’s Ultem UTF120 film technology offers advantages for capacitor applications, such as high dielectric constant and insulation resistance and low dielectric loss. The two new grades address the need for higher-voltage applications that require thicker film with greater storage capacity.
The new film products will enable the design of lightweight, compact, high energy density capacitors that can store large amounts of electrical energy for long periods without significant current leakage or loss of charge at high temperatures. This technology can benefit capacitor applications by delivering key properties including high dielectric constant and insulation resistance and low dielectric loss, which are stable at temperatures up to 150°C and at high frequencies
With a temperature range of -40°C to 150°C, Ultem UTF120 film exceeds the temperature performance of commodity capacitor materials such as polypropylene (PP) and polyethylene terephthalate (PET) film. As such, the film may support demanding applications such as DC-DC converters and electric compressors for electric vehicles. Because it can handle higher temperatures, it can reduce or potentially eliminate the need to actively cool converter capacitors by way of a secondary source. For instance, the film can minimize the need for cooling loops used to reduce temperatures for PP and PET film capacitors, which have traditionally taken up precious under-bonnet space and can constrain design flexibility.
Capacitors using Ultem UTF120 film are capable of withstanding industry-standard 260°C reflow soldering processes. The film also provides handling through metallization, capacitor winding and flattening (squashing). It can be processed on existing equipment and has been validated with both film-foil and metalized electrodes, including flat, tapered and patterned metalized electrode designs.
SABIC Saudi Basic Industries Corporation
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