1. Background

Viscosity is an important physical and chemical property of liquids and colloidal systems, involving intermolecular interactions and flow resistance. In coatings, adhesives and other fields, viscosity directly affects the performance of products, processing and construction processes. In order to determine the viscosity accurately, the falling ball 

2. Principle and instrument

The falling ball viscometer method is a conditional viscosity test method suitable for transparent liquid products with high viscosity. It is based on the specified temperature, a certain diameter of the steel ball in the glass tube containing the sample moving up and down, to determine the time required to pass the scale line.

Falling ball viscometer method: an effective tool for the determination of liquid viscosity

3. Procedure

Pour the transparent sample into the glass tube so that it is 40 mm above the scale line.

Put in a steel ball of the specified diameter and insert a cork with an iron nail.

Use a permanent magnet to hold the steel ball, turn the tube upside down and then reverse, so that the steel ball falls freely.

The stopwatch is used to measure the time when the steel ball passes through the upper and lower scale lines, and record the result.

Multiple measurements were made and the average was taken as the final result.

4. Advantages and applications

High viscosity application: The falling ball viscometer method is suitable for high viscosity liquids, especially transparent liquids, such as certain coatings and resins.

Accurate measurement: This method is simple to operate, and accurate viscosity data can be obtained by multiple measurements and averaging.

Quality control: In the manufacture of coatings and adhesives, controlling viscosity is essential to ensure product consistency and performance.

Construction performance: For the coating, the control of viscosity is closely related to the construction performance, and the appropriate viscosity helps to uniform construction and coating film formation.

Industry standard: The falling ball viscometer method is widely used as a standard test method for coatings and adhesives, and is specified in the relevant standards.

Falling ball viscometer method: an effective tool for the determination of liquid viscosity

5. Conclusion

As a reliable and simple test method, the falling ball viscometer method is of great significance in the fields of coatings and adhesives. By measuring viscosity, manufacturers can optimize product formulations and ensure quality consistency. In addition, proper viscosity control can also improve construction performance and the performance of the final product. Therefore, the falling ball viscometer method plays an important role in industrial production and quality control.