How to identify good and bad powder coating coatings

With the development and growth of powder coating coatings, the market demand increases, and the quality of powder coating coatings has also begun to be uneven. So how should we distinguish between good and bad powder coating coatings?

1. Appearance identification method:

1. Hand feel

Good powder hand feels silky smooth, loose, and floating. Bad powder feels rough, heavy and heavy. Grab a handful of powder in your hand, the smoother and looser the powder, the better the quality, on the contrary, the powder is rough and heavy to the touch, and the quality is poor. Poor quality powder is not easy to spray, and there is a lot of secondary powder drop, which is very wasteful.

2. Volume

The larger the volume, the less filler the powder coating coating inside, the higher the cost, and the better the powder quality. The smaller the volume, the higher the filler inside the powder coating coating, the lower the cost, and the worse the powder quality. For the same weight, the large volume is good powder, and the small volume is bad powder. Poor powder is not easy to spray, there are many secondary powder drops, large waste, small paint area, and high use cost.

3. Storage time

Good powder can be stored for a long time, and the powder leveling and other effects remain unchanged. Poor powder cannot be stored for a long time, poor powder after 3 months of poor leveling and other effects deteriorate. Normal powder has a shelf life of 12 months at room temperature, and the quality of low-end raw materials is unstable and easy to deteriorate. Using poor raw materials to produce powder, the sprayed surface accelerates powdering and aging after half a year. In addition, poor powder is not easy to store, resulting in large powder waste and high costs.

2. Spraying area identification method: spraying area

The resin content of normal powder should be about 55-65%, the resin price is about 20 yuan/KG, and the filler is about 2 yuan. Some defective powder factories use less than 45% resin content to inferior, increase fillers to reduce costs, and reduce spraying area.

Comparison method: Two companies of the same kind of powder spraying the same product, see which one has more powder spraying products, which one has fewer spraying products, and the less sprayed products are poor, and the cost of use is high. According to the calculation of 6 square meters per kilogram of powder spraying, each less spraying square is equivalent to the manufacturer paying 3-6 yuan more per kilogram of powder, it is recommended to use the manufacturer's genuine powder, carefully calculate your actual use cost. The theoretical spraying area is 8-10 square meters, 6-8 square meters, and the actual spraying area is 4-6 square meters, 3-5 square meters, and the use cost per square meter is 3-6 yuan and 4-8 yuan.

3. Spraying personnel operation identification method: powder loading rate

The powder with good powder feeding rate is very easy to spray, and the substrate can be covered by spraying 1-3 shots, and the secondary recovery powder is less and the efficiency is high. Poor powder is not easy to powder, spray 3-5 shots to cover the substrate, there is a lot of secondary recovery powder, low efficiency. The operator can determine the amount of powder that falls by spraying the powder rate. There are few products produced at the same time, and there are many secondary recycling powders, which increases the burden on operators and has low efficiency.

4. Baking identification method: whether there is smoke produced

Good powder does not produce a lot of smoke during baking. Poor powder has a lot of smoke production during baking.

5. Appearance and gloss identification method of finished products after baking: appearance after baking

Good powder after baking the product has a delicate appearance, fullness, transparency, strong three-dimensional sense, and can maintain a relative luster for a long time. After poor powder baking, the appearance of the product is dull, dull, the surface is foggy, not transparent, the three-dimensional sense is poor, and the gloss is good when it is just baked, but it cannot maintain long-term luster stability, and after a period of time, there will be luster, powdering, paint peeling and other phenomena.

6. Adhesion and aging identification method: adhesion and aging

Good powder has strong adhesion, strong toughness, and can maintain non-powdering and aging for several years. Poor powder adhesion is poor, very brittle, and begins to age and powder three to half a year after spraying. Compare adhesion and flexure, and observe whether the product has aged or powdered after a few months. Poor adhesion and aging, the product is easy to age, powder, rust, shorten the service life of the product.

7. High temperature identification method: high temperature

Adjust the temperature to between 220-230 degrees and keep warm for 10-15 minutes, good powder, better temperature and weather resistance, after high temperature baking, the color change is small, and the luster does not change much. Poor powder, poor temperature and weather resistance, after high temperature baking, serious discoloration, dull luster. This method is particularly effective in detecting outdoor light-colored powders. Poor powder uses poor resin, titanium dioxide, poor pigments and fillers, poor temperature and weather resistance. Low cost, shoddy good.

8. Environmental protection identification method: SGS environmental protection testing

Good powder materials are produced by large factories, and environmental protection is guaranteed. Poor materials and recycled powder cannot ensure that environmental protection does not exceed the standard for a long time. Environmental protection SGS detection of environmental protection exceeds the standard, which will give some export companies more trouble to build cars.

Powder coating coatings often fake (cut corners):

1. Selection of resin and raw materials: epoxy, polyester is an accessory of petroleum, genuine oil and accessories are bulk products, materials all over the country, from south to north, from west to east, there is not much difference, the way of falsifying materials is nothing more than shoddy good, with poor raw materials black epoxy and black polyester instead of good materials, all walks of life are the same.

2. The ratio of resin and filler: the resin content of normal powder should be about 55-65%, the resin is about 20 yuan/KG, and the filler is about 2 yuan/KG. The content of poor powder resin is less than 45% to be inferior, and the filler is increased by 2 yuan/KG to reduce the cost.

3. The addition ratio of recycling powder: recycling powder is divided into floor powder, sweeping powder, miscellaneous powder recovered from the air duct, miscellaneous powder in the recycling box, problem powder and expired powder. The normal market price of recycling powder is 1-3 yuan/KG. The price of recycled powder on the market varies from 8 yuan/KG, 12-13 yuan to 16-17 yuan/KG according to the addition ratio of recycled powder. Adding recycled powder is the main way to counterfeit powder coating coatings.

Analysis of the current situation of powder coating coatings:

Powder coating coatings are processing consumables products, the investment threshold is relatively low, the market competition is fierce, but also caused the powder coating coating market to be chaotic, cutting corners is serious, to some genuine enterprises has caused a relatively large impact, coupled with powder coating coatings are powdery substances, not easy to identify, to some powder enterprises to cause greater economic losses. Originally, the actual amount of the product was 3 tons, through material adulteration, cheap, the amount of powder increased to 4-5 tons, but increased the cost of powder enterprises, most powder enterprises only care about powder, do not care about the actual cost of use, causing greater losses to enterprises.