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Plastic viscosity

  • Mar 31, 2025

Plastic viscosity refers to the size of the mutual friction coefficient between macromolecules when the plastic melts and flows. It is a reflection of the fluidity of the plastic melt, that is, the greater the viscosity, the stronger the melt viscosity, the worse the fluidity, and the more difficult the processing. The size of the plastic viscosity is inversely proportional to the size of the plastic melt index. The plastic viscosity changes with the characteristics of the plastic itself, external temperature, pressure and other conditions.

Main text

Plastic viscosity refers to the size of the mutual friction coefficient between macromolecules when the plastic melts and flows. It is a reflection of the fluidity of the plastic melt, that is, the greater the viscosity, the stronger the melt viscosity, the worse the fluidity, and the more difficult the processing. The size of the plastic viscosity is inversely proportional to the size of the plastic melt index. The plastic viscosity changes with the characteristics of the plastic itself, external temperature, pressure and other conditions.

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