PROCESS AND APPARATUS FOR THE CRYSTALLISATION OF POLYTRIMETHYLENE TEREPHTHALATE.

摘要

A PROCESS FOR REDUCING THE SELF-ADHESIVENESS OF POLYTRIMETHYLENE TEREPHTHALATE PELLETS COMPRISING THE STEPS OF : CONTACTING MELT-PHASE-POLYMERISED POLYTRIMETHYLENE TEREPHTHALATE PELLETS (21) HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.4 dl/g WITH AN AQUEOUS LIQUID (29) AT A TEMPERATURE WITHIN THE RANGE OF 65 TO 100°C FOR A TIME SUFFICIENT TO INDUCE A DEGREE OF CRYSTALLINITY OF AT LEAST 35% IN THE POLYTRIMETHYLENE TEREPHTHALATE PELLETS; AND A CRYSTALLISATION APPARATUS (11) FOR USE THEREIN.