What is the detailed process of the paint production process?

2024-03-26

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Paint production process:

1. Ingredients

The ingredients are done in two batches. First, the grinding color paste is prepared according to a certain ratio of pigment/base material/solvent to make it have the best grinding efficiency; after dispersion and grinding, the remaining components are supplemented according to the color paint formula, and then dispersed and mixed. The ingredients should be weighed accurately.

2. Scatter

The effect of pigment dispersion in paint on the performance of paint:

First, the color paint first requires uniform color. If the pigment is not uniformly dispersed in the paint, the color of the paint film will be different, which will affect the decorative purpose.

Second, the pigment is a solid, and its specific gravity is generally greater than that of the paint. If it is mixed and dispersed unevenly in the paint, it will precipitate and agglomerate during storage.

Third, the color paint is applied to form a film, and the general film thickness can reach below 20 μm. If the pigment agglomerates are too large, if they are not dispersed to a suitable size, the paint film will be rough and uneven and affect the gloss. Therefore, the uniform dispersion of the pigment is very important.

Dispersion is to mix the prepared pigment and paint to make the pigment initially wet and disperse, and also prepare for the next grinding.

3. Grinding

The grinding process is under the action of shearing force, the pigment agglomerates and the pigment itself coagulate and the air bubbles contained in it are shredded and discharged, and the larger powder particles are ground into the specified fineness. Obtain a pigment in the paint dispersed evenly fine color paste.

Grinding equipment mainly includes sand mill, ball mill, three-roller and so on.

Different grinding equipment has different grinding process parameters.

Grinding viscosity: three-roller>ball mill>sand mill Grinding fineness: three-roller>sand mill>ball mill Grinding efficiency: sand mill>ball mill>three-roller Easy to clean: three-roller>ball mill>sand mill 4. Paint mixing Paint mixing is the process of mixing color paste with resin solution, solvent, auxiliary and other components required for coating with stirring equipment to prepare color paint. The paint mixing equipment can use a container with stirring.

4. Filtration The purpose of the filtration process is to remove unground pigment particles and impurities, patent leather, etc. mixed in the production process. Filtration equipment mainly consists of plate and frame filters, centrifugal filters, bag filters, etc.

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