| 摘要 |
A process for preparing a shaped article by melt-extruding a polyester containing tetramethylene naphthalene-2,6-dicarboxylate or hexamethylene naphthalene-2,6-dicarboxylate as a main recurring unit, wherein the extrudate is exposed to a temperature of 75 DEG to 450 DEG C. for 1 to 180 seconds immediately after extrusion. |
