| 摘要 |
An improved process for the pelletization of polymers is disclosed, using a die in which the die holes incorporate a reverse taper along at least a portion of the length thereof. Conditions for operation of an under melt cutter incorporating this die are also disclosed. The die plate (1) has an exit face (2), where the polymer (not shown) exists the die (hole), and an entrance face (3) where the (molten) polymer enters the die hole (4). In this particular instance, (4) is straight over part of its length, zone 5, and has a reverse taper over part of its length, zone 6. The tapered portion has a"taper angle" (8).
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