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Polyimide (PI) is an organic polymer material with excellent comprehensive properties. It has high temperature resistance of more than 400 ℃, long-term use temperature range - 200-300 ℃, no obvious melting point, high insulation performance, dielectric constant of 4.0 at 103 Hz, dielectric loss of 0.004-0.007, belonging to class F to H insulation material.
