Capacitor films with a thickness of only 3.8 μm were prepared using industrial-largescale processing (biaxial stretching). The high-temperature breakdown strength and charge/discharge properties of the blended film are significantly improved compared with that of pure BOPP film.
A thinner film in a capacitor prepared by film winding allows for more parallel groups or lower volume, as possible to realize the miniaturization and light-weight of devices , . Therefore, there is an important need in commercial applications to minimize film thickness by industrial-scale processing.
The high-temperature breakdown strength and charge/discharge properties of the blended film are significantly improved compared with that of pure BOPP film. In recent decades, enhancing the high-temperature resistance of capacitor films was a research focus, but largescale-producing high-temperature resistant films remains a difficult issue.
It is evident that the capacitance loss in pure BOPP film capacitors at high temperatures is substantial. Specifically, a 24 % loss in capacitance was observed after operating at 105 ℃ for 1000 h, with the capacitor essentially failing after more than 500 h of operation at 700 V and 125 ℃.
Jianghai brand capacitor is one of the national brands with independent intellectual property rights and self-owned brands in China’s electronic components industry, which has truly entered the international high-end mainstream market through its own channels. Xiamen Faratronic Co., Ltd. is a world-leading professional film capacitor manufacturer.
The high-temperature breakdown resistance of BOPP is a critical factor that directly impacts the effectiveness of film capacitors. We evaluated the breakdown strength of various BOPP/COC thin film at varying temperatures and analyzed the data using the Weibull distribution.
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