Successfully Help Our Customers to Solve the Problem of Powder Coating Agglomeration

The treatment of powder coating agglomeration mainly includes adjusting the formula ratio, adding additives, controlling the production process and improving storage conditions.

Adjust the proportion of formula: by adjusting the amount of resin curing agent and the proportion of pigment filler, choose the base material with higher glass transition temperature, such as the use of polyester resin, choose terephthalic acid in the monomer rather than phthalic acid, because the former has a better anti-agglomeration and weathering effect. Because the former has better anti-agglomeration and weathering effect. In addition, increasing the proportion of fillers can also reduce the possibility of agglomeration12.

Addition of additives: Anti-blocking organics such as silica, alumina, sodium silicate and other inorganic micronized powders, as well as oleic acid amides, EBS, are added to powder coatings, Polyethylene waxes and other organics, these additives can be involved in the extrusion process and help reduce agglomeration12.

Control the production process: Ensure that the extruded sheet is sufficiently cooled, control the temperature and humidity of the milling environment, adjust the powder particle size appropriately, and reserve a certain amount of space when packing after cooling. In addition, for powders with a lot of ultrafine powder, care should be taken to avoid using them in environments with high humidity and temperature to minimize agglomeration when spraying12.

Improve storage conditions: Powder coatings should be stored in a dry and ventilated place to avoid waterlogged humidity and agglomeration caused by accumulation of pressure. Attention to detail is required during storage and transportation, such as turning the bottom layer of accumulated powder upside down during long-distance transportation loading and unloading to prevent long-time extrusion agglomeration1.

By the above method, the problem of powder coating agglomeration can be effectively solved to ensure the quality of the coating and the spraying effect.