作者: Masakazu Okahashi , Akimitsu Tsukuda , Tsuneyoshi Miwa , Charles M. Paulson , James R. Edman
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摘要: An isotropic, biaxially stretched polyimide film prepared by casting a solution of polyamic acid precursor in an organic solvent containing cyclization catalyst and dehydrating agent onto the surface support, imidizing to give continuous self-supporting gel 5-50% weight solids, stretching machine direction (MD) at ratio 1.1-1.9, transverse (TD) with respect so as maintain TD/MD stretch from 0.9 1.3.