METHOD TO REDUCE DEPOSITS OF TEREPHTHALIC ACID ON COOLING ROLLS DURING SHEET EXTRUSION OF AMORPHOUS POLYETHYLENE TEREPHTHALATE

摘要

ABSTRACT OF THE DISCLOSUREPhysically blending small amounts of polycarbonateresin into polyethylene terephthalate resin which is to beextruded and cooled to form an unoriented amorphous sheetreduces deposits of terephthalic acid on the cooling rollsduring sheet extrusion.