Application of Particle Size Analyzer in Powder Coating Industry

1. How to choose the appropriate granularity detection method.

The particle size detection and control of powder coatings are crucial for production and application enterprises. So, how to choose suitable detection equipment?

1.1 Spraying in the field of white goods and other industries requires high powder particle size, and wet laser particle size analyzer is suitable.

1.2 For spraying in fields such as steel windows and iron cabinets, the relative requirements are not high, and screening can be chosen as the detection method.

1.3 It is essential for manufacturers of powder coatings for export to equip themselves with laser particle size analyzers.

2. How to read the test report of laser particle size analyzer.

2.1 Content included in routine test reports. Test parameters, characteristic particle size, distribution curve, distribution table.

2.2 Based on the data reflected in the specific report, the production process can be adjusted to meet the customer's particle size requirements for powder coatings.

3. What kind of particle size distribution is better for powder coatings

Usually, the particle size distribution of powder coatings is between 10-70 microns, and an average particle size of around 35 microns is more suitable for most applications, as mentioned above.

4. Analysis of Differences in Dry and Wet Testing Results

Due to various reasons, some customers (especially foreign or foreign-owned) are accustomed to using dry laser particle size analyzers, while most domestic customers currently use wet laser particle size analyzers. Therefore, some customers have proposed a comparison of dry and wet test results. Generally speaking, due to different injection methods, the dry method results are greater than the wet method results, but the difference between the two is generally relatively stable and can only be qualitatively analyzed, and conclusions cannot be quantitatively given. There is no question of who is more accurate between the two results, as both objectively reflect the particle size distribution of the powder. For test results, emphasis should be placed on their repeatability and stability. Only when these two requirements are met can they provide guidance for production and application. The difference between dry and wet testing results should not be a barrier in the application process of laser particle size analyzer.

5. Dispersion methods and testing techniques for powder coatings

The hydrophilicity of powder coatings in water is poor. During the testing process, a dispersant is added and sonicated in an ultrasonic cleaner for 3-5 minutes with a refractive index of 2.6. It is important to control the amount of sample added. Only by fully preparing for the above can accurate test results be obtained.