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Recyclability of Metal Powder Coatings
For powders produced by dry blending, due to separation during spraying and recycling, there will be differences in metallic pigment content between recycled powder and virgin powder, which may result in inconsistent appearance of the coating film and color cast.
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Advantages of Metal Powder Coating Finishes
Spraying a cover layer on a metal powder coating has the following advantages:
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Coating method of metal powder coating
Friction spray guns are generally not suitable for spraying metal powder coatings. In most cases, electrostatic spray guns are recommended for application. Since this type of product contains metallic pigments, when using an electrostatic gun for construction, ensure that the system is well grounded, and at the same time set a lower electrostatic voltage and powder output to prevent ignition during spraying. The effect of forming a coating film has a great relationship with the setting, quality or brand of the spray gun. After spraying for a long time, a large amount of metal powder may accumulate at the discharge needle of the spray gun, and the applicator needs to clean the discharge needle regularly.
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The characteristics of polyurethane powder coating
Compared with other types of powder coatings, polyurethane powder coatings have the following characteristics: (1) When melted and leveled, the melt viscosity is low, especially the sealing agent does not have any chemical reaction before unsealing, so that the powder coatings have enough leveling time, coating Membrane leveling is good.
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