The capillary rheometer is mainly used to test the rheological properties of polymer material melt; the working principle is that the material is heated and melted in the electric heating barrel, and the lower part of the barrel is equipped with a certain specification capillary die (with different 0.25～2mm in diameter and 0.25～40mm in different lengths). After the temperature is stabilized, the material rod on the upper part of the barrel is driven by the drive motor to extrude the material from the capillary die at a certain speed or at a certain regularly changing speed. During the extrusion process, the pressure at the inlet and outlet of the capillary die can be measured, and the known speed parameters, die and barrel parameters, and rheological models can be combined to calculate the melt at different shear rates. The shear viscosity.
The capillary type is suitable for the measurement of a wide range of apparent viscosity (especially suitable for high-speed, high-viscosity fluids), the shear rate and the streamline during flow, and the geometry is similar to the actual conditions of extrusion injection molding. It can accurately measure the viscosity, elasticity and rheological properties of the material.
