How to identify good or bad from the appearance of powder coating
How to identify good or bad from the appearance of powder coating
At present, powder coatings are widely used, and there are many powder coatings on the market, so how do we identify the quality of powder coatings from their appearance?
1. Hand feel:
The hand feel is silky smooth, loose and floating. The hand feels rough, heavy, and heavy. Grab a handful of powder in your hand, the smoother and looser the powder is, the better the quality. It is not easy to spray, and there is a lot of secondary powder falling, and the waste is large.
2. Volume:
The larger the volume, the less filler in the powder coating and the higher the cost. The better the powder quality. The smaller the volume, the higher the filler in the powder coating and the lower the cost. The worse the powder quality. In the same carton, a large volume of powder is a good powder, and a small volume is poor. It is not easy to spray, the secondary powder is more, the waste is large, the spraying area is small, and the use cost is high.
3. Storage time:
Good powder can be stored for a long time, powder leveling and other effects remain unchanged. Poor powder can not be stored for a long time, poor leveling and other effects become poor after 3 months. The shelf life of normal powder at room temperature is 12 months, and the quality of products using low-end raw materials is unstable and easy to deteriorate. Using poor raw materials to produce powder, the sprayed surface will accelerate pulverization and aging after half a year. Affect customer reputation. In addition, the powder is not easy to store, resulting in a large waste of powder for customers and a high cost of reporting.
