Processing Machinery
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Narrow Processing Temperature Window of acrylonitrile-butadiene-styrene copolymer MSAN Products
Problembeschreibung
The MSAN processing temperature range is narrow (220-260°C); if the temperature is slightly low, the plasticization is poor, and if slightly high, degradation occurs.
Ursachenanalyse
（1）MSAN has good heat resistance but a narrow thermal stability window
（2）The barrel temperature control accuracy is insufficient, and the fluctuation is large
（3）The screw rotation speed is too fast, and the shear heat raises the temperature
（4）The material residence time is too long, causing local overheating
（5）The regrind ratio is high, and the thermal stability of the material decreases
Lösung
（1）Precisely control the barrel temperature, with fluctuation ≤±2°C
（2）Appropriately reduce the screw rotation speed to reduce shear heat
（3）Shorten the material residence time
（4）Control the regrind ratio to no more than 10%
（5）Use precision temperature control equipment
Wichtigste Erkenntnis
The narrow MSAN processing temperature window requires precise temperature control.
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