| 摘要 |
A three-dimensionally shaped aromatic imide polymer sheet article is produced by a method comprising the steps of shaping an aromatic imide polymer sheet having a second order transition temperature of 250 DEG C. to 400 DEG C. and an ultimate elongation of 120% or more at 100 DEG C., by press-stretching at least a portion of the sheet at a temperature of 100 DEG C. or more, but not exceeding a temperature of 100 DEG C. higher than the second order transition temperature of the sheet, into a desired three-dimensional convex or concave form protruding from the sheet, heat-setting the resultant shaped sheet article in its shaped form at a temperature equal to or higher than the second order transition temperature of the sheet, and then cooling the heat-set sheet article to a desired low temperature.
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