Meaning of measurement
Measuring the viscosity of paper coatings plays an important role in ensuring coating quality, controlling production processes and ensuring product stability. For paper coating companies, regular viscosity measurement is an indispensable quality control step. It mainly includes the following aspects:
Guarantee the coating quality: The viscosity of paper coating is one of the important factors affecting the coating quality. If the viscosity is too high or too low, it will affect the thickness, uniformity and adhesion of the coating, and affect the quality of the paper. By measuring the viscosity of paper coatings, it is possible to ensure that the quality of the coating meets the specified standards and improve the quality and competitiveness of the product.
Control the production process: The viscosity of paper coating is related to the production process. If the viscosity is too high, it will affect the uniformity and coating efficiency of the coating. If the viscosity is too low, it will affect the thickness and adhesion of the coating. Measuring the viscosity of paper coating can adjust the process parameters in time, control the viscosity in the production process, and improve production efficiency and product quality.
Ensuring product stability: The viscosity of paper coatings also has an important influence on product stability and shelf life. Too high or too low viscosity may lead to problems such as delamination of the coating, slow or fast drying speed, etc., which will affect the use and storage of the product. By measuring the viscosity of paper coatings, problems can be found and adjusted in time to ensure product stability and shelf life.
Rotational viscometers are also widely used in the detection of paper coating viscosity. In the coating and ink industry, viscosity is a very important parameter that can be used to evaluate its performance and processability.
application
Evaluate the viscosity of coatings to determine coating thickness and coating performance.
Evaluate the rheological properties of coatings, such as shear stress, shear rate, and rheological index.
Evaluate the stability and dispersion properties of coatings to explore the properties and performance of coatings.
Detection steps
According to the type of sample and the required temperature range, select the appropriate Rotational Viscometer and calibrate it.
Prepare the sample and inject it into the Rotational Viscometer.
According to the characteristics of the sample and testing requirements, set the testing parameters of the Rotational Viscometer, such as temperature, rotational speed and time, etc.
Start the Rotational Viscometer and observe the movement of the sample within the Rotational Viscometer while recording the viscosity data.
Repeat the above steps over the desired temperature range to obtain more data and verify viscosity stability.
Calculate the viscosity value of the paint according to the obtained data, and analyze and compare the results.
After the test is complete, turn off the Rotational Viscometer and clean the device and sample.
Precautions
NBCHAO reminds you: when testing the viscosity of paper coatings, you need to pay attention to the following points:
The preparation and processing of samples should be operated strictly in accordance with the regulations to avoid the influence on the test results.
During the detection process, parameters such as temperature and rotational speed need to be well controlled to ensure the accuracy and reliability of the data.
According to different coating materials and testing purposes, it is necessary to select a suitable Rotational Viscometer and set appropriate test parameters.
When testing the viscosity of paper coatings, it is also necessary to pay attention to the safety of equipment and samples to prevent accidents.
