Melt pump manufacturers share some parameters of melt viscosity

What is the viscosity of the material?

The melt pump is suitable for the extrusion process of PS, PP, PET, PVC, PC, PMMA, PA, ABS, PE-LLD and other materials. The viscosity of the conveyed material is also very different. The viscosity of the material will affect the speed of the melt pump. Generally, the viscosity of the material is large, which means that it is thicker, the fluidity is relatively poor, and the speed of the melt pump is relatively small; the viscosity of the material is small, which means that it is thinner, the fluidity is better, and the speed is relatively large.

What factors affect the viscosity of the material?

Generally, the following four factors affect the viscosity of the material: shear rate, temperature, pressure, and molecular weight. When the shear rate is large, the viscosity of the material will increase; when the temperature is high, the viscosity of the material will decrease; when the pressure increases, the viscosity of the material will increase; when the molecular weight increases, the viscosity of the material will also increase.

Some units of material viscosity?

The unit of melt viscosity: Pa second, centipoise, s, kinematic viscosity. 1Pa·s (Pa second)=1000cP (Centipoise)

1 s=1000Cst (kinematic viscosity) 1Pa·s=10P (poise)==1000cP

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