发明名称 |
POLYIMIDE FILM AND PREPARATION PROCESS OF THE FILM |
摘要 |
<p>A polyimide film essentially consisting of polyimide having recurring units of the formula ( I ): ( I ) which has a density of 1.335 to 1.390 g/cm at 23 .degree.C and/or a refractive index of 1.605 to 1.650 at 23 .degree.C in the direction of thickness and is transparent; and a preparation process of the polyimide film by extruding the polylmide 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 heattreatment; are disclosed.</p> |
申请公布号 |
CA2021293(A1) |
申请公布日期 |
1991.01.18 |
申请号 |
CA19902021293 |
申请日期 |
1990.07.16 |
申请人 |
MITSUI TOATSU CHEMICALS, INC. |
发明人 |
SARUWATARI, MASUMI;OHTA, YASUHIKO;FUJII, YASUHIRO;HONJI, YASUKO;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;(IPC1-7):B29C55/12 |
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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