流動性, 一貫性, 建築における塗料の刷毛塗り性と塗装性能は粘度に大きく依存します。. Accurate measurement of the viscosity of coatings is very important for the production, development and construction of coatings. コーティング -4 cup viscometer is one of the commonly used instruments to determine the viscosity of coatings.

1. コート -4 cups viscometer introduction

コーティング -4 cup viscometer is based on the measurement principle of kinematic viscometer, あれは, at a specific temperature, the viscosity of the coating is determined by measuring the time that a certain amount of sample flows out of a specified diameter of the hole. It is especially suitable for paint samples with an outflow time between 10-150s.

2. Steps to determine the viscosity of the coating

(1) 準備:

① Preparation of test liquid: in a beaker of about 150mL, use a tray balance to accurately weigh 100g of the paint to be tested. If dilution is required, ある 50% solution should first be mixed with the corresponding solvent (例えば, キシレン), and then stirred with a glass rod until completely dissolved.

② Inspection of the viscometer: Ensure that there is no residual material in the coating -4 cup viscometer, and adjust its levelness so that the circular blister on the viscometer is located in the center.

Maintain a constant temperature: the test temperature should be maintained at 25±1°C, while ensuring that the temperature of the test liquid is also within this range.

(2) テストプロセス:

① Slowly inject the test liquid into the coated -4 cup viscometer, at the same time close the outflow hole with your finger, so that the test liquid reaches the top, and then scrape with a flat plate, and let the excess test liquid flow into the edge groove of the viscometer.

② Let go of the finger, let the test liquid flow freely, and use the beaker to carry on the outflow of liquid. 同時に, turn on the stopwatch until the test liquid is completely drained.

③ Record the outflow time, the time is the viscosity of the paint, the unit is second.

コーティングの決定方法 -4 カップ粘度計とその塗料への応用

3. Expression and precautions of viscosity results

• The results of the test are expressed as the arithmetic mean of the measurements of two parallel samples, and the difference between the results of the two measurements cannot exceed 3% of the mean.

• Before using the coated -4 cup viscometer, it is necessary to check and ensure that there is no residual test liquid inside.

• The operator should pay special attention to self-protection, such as skin contact with liquid, should be washed immediately.

• The viscosity of the paint is greatly affected by temperature, so ensure that samples and tests are carried out at a constant temperature of 25°C.

4. Comparison between the flow rate of coating -4 cups and the standard viscosity

In order to more accurately interpret and understand the reading of the Tu-4 cup viscometer, you can refer to the comparison table of the Tu-4 cup flow rate and the standard viscosity. This comparison table can help the user convert the measured flow rate into a specific viscosity value.

コーティングの決定方法 -4 カップ粘度計とその塗料への応用

5. Conclusion and reference

コーティング -4 cup viscometer is a relatively simple but very practical tool that is of great value in both paint production and application fields. Accurate viscosity measurement not only helps in the development and quality control of coatings, but also ensures that coatings can achieve better performance during construction. 実際の応用例では, the relevant standard operating procedures should always be referred to and followed, such as the national standard GB/T 1723-93 “Coating viscosity determination Method” and relevant enterprise standards.