发明名称 |
Process for the preparation of a polyimide film. |
摘要 |
<p>A polyimide film essentially consisting of polyimide having recurring units of the formula ( I ): <CHEM> which has a density of 1.335 to 1.390 g/cm<3> at 23 DEG C and/or a refractive index of 1.605 to 1.680 at 23 DEG C in the direction of thickness and is transparent; and a preparation process of the polyimide film by extruding the polyimide having recurring units of the above formula ( I ) throught a common melt-extrusion process, casting an a chill-roller to obtain an unstratched film, uniaxially or biaxially stretching the unstretched film to cause molecular orientation, and successively setting the stretched film through heat-treatment; is disclosed.</p> |
申请公布号 |
EP0409466(A2) |
申请公布日期 |
1991.01.23 |
申请号 |
EP19900307507 |
申请日期 |
1990.07.10 |
申请人 |
MITSUI TOATSU CHEMICALS INC. |
发明人 |
SARUWATARI, MASUMI C/O MITSUI APARTMENT J-508;FUJII, YASUHIRO C/O MITSUI TOATSU TAKIHARU-RYO;OHTA, YASUHIKO C/O MITSUI TOATSU TAKIHARU-RYO;HONJI, YASUKO, HIGASHI DAIDO 84;TSUJI, SHOICHI;MORIYA, SHINOBU |
分类号 |
B29C55/00;B29C55/02;B29C67/24;B29K79/00;B29L7/00;C08G73/10;C08J5/18;H05K1/03;H05K3/00 |
主分类号 |
B29C55/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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