Rheological testing instrument capillary rheometer

description

Overview

The working principle of capillary rheometer is the plasticization process of materials from granular (or powdery) to molten state under the influence of temperature, pressure and other factors, testing the dynamic rheological phenomenon of materials transitioning from glassy state to viscous state. In the experimental process, the operating parameters of the capillary rheometer are first set, and an appropriate amount of material is weighed according to the testing conditions. After the temperature reaches the set conditions, suitable mouth molds and pressure sensors are installed. After the temperature stabilizes, the material is added to start testing. Through the experiment, the viscosity and apparent shear stress of the material at a certain temperature can be obtained as a function of shear rate. At the same time, the computer screen will dynamically display the temperature, apparent shear rate, apparent shear stress, and apparent viscosity dynamic rheological curves of the material

Product performance

The use of capillary mouth molds can test the apparent viscosity curve of materials

Selecting capillary die with different aspect ratios to test the true viscosity curve of materials

Optional narrow slit die for testing the rheological curve of materials under special flow fields

An optional laser caliper can be used to record the diameter of the extruded material in real time and study its extrusion swelling behavior

Scope of application

Apparent/True Viscosity Curve Test

Measurement and analysis of extrusion swelling behavior

Research and development of new products and formulas

Optimization of production process parameters