What are the identification methods for the pros and cons of powder spray coatings

Appearance identification method:
1. 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. The larger the volume, the less filler in the powder coating, the higher the cost, and the better the quality; the smaller the volume, the higher the filler in the powder coating, and the lower the cost. The worse the quality.
3. The powder with good storage time can be stored for a long time, and the power leveling and other effects remain unchanged. The 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, poor raw materials are used to produce powder, and the sprayed surface will accelerate pulverization and aging after half a year.

Spraying area identification method:
The resin content of the normal powder in the spray area should be about 55-65%, and the resin is about 20 yuan/KG.
Comparison method: Two products of the same powder spraying the same product, depending on the area of ​​the powder sprayed product, the less sprayed area are poor, and the use cost is high. For the manufacturer, the smaller the spraying area, the higher the cost of use. It is recommended to use genuine powder from the manufacturer.

Job identification method of sprayer:
High powder rate, the high-efficiency powder is very easy to spray, spray 1-3 guns can cover the substrate, less secondary powder recovery, high efficiency. The poor powder is not easy to be powdered, and the substrate can be covered by spraying 3-5 guns. The secondary recovery powder is too much and the efficiency is low. The operator can determine the amount of powder falling by spraying the powder rate. At the same time, fewer products are produced, and more secondary powder is recovered, which increases the burden on operators and is low inefficiency.

Baking identification method:
A good powder does not produce a lot of smoke during the roasting process. Poor powders produce a lot of smoke during baking.

Appearance and gloss identification of finished products after baking:
A good powder product has a fine, plump, transparent appearance, strong three-dimensional effect, and can maintain a relative luster for a long time. Poor powder products have a dull, rigid appearance, foggy surface, opaque, and poor three-dimensional sense.

Adhesion and aging identification method:
The good powder has strong adhesion, and strong toughness, and can keep for several years without chalking and aging. Poor powder coating starts to have poor adhesion and aging in a short period of time, and the product is easy to age, chalk, rust, etc.

High-temperature identification method:
Adjust the temperature to 220-230 degrees and keep it warm for 10-15 minutes. The good powder has better temperature resistance and weather resistance. After baking at a high temperature, the color change is small, and the gloss changes little. Poor powder, poor temperature and weather resistance, serious discoloration after high-temperature baking, dull luster.