| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve problems on the physical properties of a film (quality degradation and the like such as degradations of transparency and surface nature and the like) due to foam formation in the film in accompany with an intramolecular cyclization reaction at molding when the film is produced by using a composition containing an acrylic resin having a glutarimide structure or an anhydrous glutaric structure.SOLUTION: A production method of an acrylic resin pellet includes: a step (A) where an acrylic resin composition containing a resin component having the constitutional units of an unsaturated carboxylic acid alkyl ester and an unsaturated carboxylic acid is charged into a melt extruder, melted, mixed and kneaded and a molten resin is obtained; and a step (B) to retain the molten resin after the step (A). In the step (B), the molten resin is retained at a temperature condition (1): 240≤T≤300 (1) and the total time t(min) of the step (A) and the step (B) satisfies a condition (2): 10≤t≤40 (2).</p> |
