النتائج (
الإنجليزية) 3:
[نسخ]نسخ!
The sum of the tensions provided by the hip rolls and the axial component of the bubble inflation force is called the machine tension. External a concentric outer ring cools the film. The resulting temperature reduction increases the viscosity of the rising film and eventually induces crystallization as the temperature drops below the melting point of the polymer. The crystallization, in turn, causes an additional increase in viscosity, and the polymer solidifies.
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