Several ways to solve the agglomeration of powder coatings by powder coating manufacturer

Several ways to solve the caking of powder coatings by powder coating manufacturer. Powder coatings tend to agglomerate at a certain temperature, which is mainly due to the softening of resins and leveling agents in powder coatings.

How to prevent the agglomeration of powder coatings?

First of all, we must establish an idea that powder coating is a natural rule at a certain temperature. To prevent agglomeration of powder coatings, powder coatings must be produced in the grinding, packaging, storage, transportation and other processes, powder coatings products in its glass temperature below.

Now let's analyze the solution.

1. In the production of polyester resin, the glass transition temperature of polyester resin can be increased by choosing some alcohols or acids which can increase the glass transition temperature, or by reducing the amount of alcohols which can reduce the glass transition temperature of the resin.

2. Reduce the use of polymers with low glass transition temperature, such as leveling agents and brighteners, in the formulation design of powder coatings to ensure that the glass transition temperature of powder coatings will not decrease.

3. In production, the crushed fragments from the steel strip should be fully cooled before entering the grinding process. When grinding, the feeding speed should be properly reduced, the air volume should be increased, and the air inlet should be equipped with air conditioning to control the grinding temperature. However, if the crushed debris does not cool down before grinding, the latter method will not play a very good role, can consider the crushed debris forced cooling method for low temperature treatment, which is more effective than adding air conditioning.

Additionally, anti-caking additives such as nano-silica (VK-SP15) or nano-aluminium trioxide (VK-L20M) powder can be added to prevent adhesion between powder particles. Anti-caking additives are generally the best grinding additives for both crushed materials and fragments.