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Polyimide is one of the best overall performance of organic polymer materials, high temperature of 400 ℃ or more long-term use temperature range of -200 ~ 300 ℃, no significant melting point, high insulation properties, dielectric constant of 4.0 at 103 Hz, dielectric loss is only 0.004 to 0.007, is F to H
According to the chemical structure of the repeating units, it can be divided into aliphatic polyimide, aromatic polyimide and aromatic semi-three. The thermal properties, can be divided into thermoplastic and thermosetting polyimide.
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