| 摘要 |
PURPOSE:To obtain the titled polymer film having high heat resistance, slip characteristics and strength, by adding thermoplastic resin mixable with a specific polyarylenethioetherketone having high heat stability and filler to the specific polyarylenethioetherketone, melt-molding the blend and then subjecting the moldings to multi-stage stretching in specific conditions. CONSTITUTION:(A) 100pts.wt. polyarylenethioetherketone having high heat stability and having repeating unit expressed by the formula, 310-380 deg.C melting point Tm, >=10J/g residual melting crystallization enthalpy DELTAHmc (420 deg.C/10min), >=210 deg.C melting crystallization temperature Tmc (420 deg.C/10min), 0.3-2dl/g reducing viscosity (in 98% sulfuric acid, 0.5g/dl, 25 deg.C) is blended with (B) <=100pts.wt. thermoplastic resin mixable with the component A and/or 15pts.wt. filler and the blend is melt-molded and stretched to 1.5-7 times in one direction at 100-180 deg.C as the first stage stretching to afford a film having 0.05-0.35 double refraction, which is then stretched in same conditions in the perpendicular direction to the first stage stretching as the second stage stretching and thermally set at 200 deg.C-less than melting point. |
