[China Aluminum Network] With the development of powder coating coatings, the market demand has increased and the quality of powder coating coatings has begun to vary. So how do we distinguish the quality of powder coating? First, appearance identification method: 1, feel Good powder hand-sensing is silky smooth, loose and floating. Bad powder feels rough, sinks, and feels heavy. Grasping a handful of powder in the hand, the smoother and looser the powder, the better the quality. On the contrary, the powder has a rough feel and is of poor quality. Poor quality powder is not easy to spray, more powder is dropped twice, and waste is great. 2, the volume The larger the volume, the smaller the amount of filler in the powder spray coating, the higher the cost, and the better the powder quality. The smaller the volume, the higher the filler content in the powder spray coating, the lower the cost, and the poorer the powder quality. The same weight, large volume is a good powder, small volume is poor powder. Poor powder is not easy to spray, more powder is dropped twice, waste is large, paint area is small, and the cost of use is high. 3, storage time Good powders can be stored for long periods of time, with the powder leveling and other effects unchanged. Poor powders cannot be stored for a long period of time. Poor powder levels deteriorate after 3 months and other effects deteriorate. The shelf life of normal powders at room temperature is 12 months, and the use of low-end raw material products is unstable and susceptible to deterioration. Using poor raw materials to produce powder, the sprayed surface accelerates chalking and aging after six months. In addition, the poor powder is not easy to store, resulting in a large waste of powder, which costs more. Second, 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 filling material is about 2 yuan. Some poor powder plants use less than 45% of the resin content to shoddy, increase the filler to reduce costs and reduce the spray area. Contrast method: Two identical powders sprayed the same product. To see which one has more powder spray products, there is less spraying product and less spraying product, and the cost is high. According to the calculation of 6 squares per kilogram of powder spray, one square for each spray, equivalent to more than 3-6 yuan per kilogram of powder, it is recommended to use genuine powder from the manufacturer, and carefully calculate the actual cost of use. Theoretical spraying area 8-10 square 6-8 square actual spraying area 4-6 square 3-5 square per square used cost 3-6 yuan 4-8 yuan. Third, spraying personnel job identification method: powder rate Powder with good powder rate can be easily sprayed, spray 1-3 guns can cover the substrate, the secondary recovery powder less, and high efficiency. Poor powder is not good on powder, spray 3-5 guns can cover the substrate, the secondary recovery of powder, low efficiency. Operators can determine the amount of powder that falls out by powder coating. At the same time, there are fewer products to be produced, more secondary recycling powders, more burden on operators, and low efficiency. Fourth, baking identification method: there is no smoke A good powder does not produce a lot of smoke during the baking process. Poor powder produces a lot of smoke during the baking process. Fifth, the appearance of the finished product after baking and the gloss identification method: the appearance after baking After a good powder baking product appearance is delicate, full, transparent, strong three-dimensional, can maintain a relatively long-term gloss. After the poor powder baking, the appearance of the product is dull and dull, the surface is hazy, impenetrable, and the three-dimensional feel is poor. The glossiness is good when it is baked out, but it cannot maintain the long-term stability of gloss, and it will lose light after a while. , Pulverization, paint stripping and other phenomena. Six, adhesion and aging identification method: adhesion and aging Good powder adhesion, toughness, and can maintain a few years of no chalking, aging. Poor powder adhesion is poor and very brittle. It starts aging and powdering three months to six months after spraying. Contrast tests for adhesion and bending, as well as observation of aging and chalking of the product after several months. Adhesion and poor aging, the product is easy to aging, powdering, rust, shorten product life. Seven, high temperature identification method: high temperature The temperature is adjusted to 220-230 degrees, and the temperature is kept for 10-15 minutes. The good powder has better temperature resistance and weather resistance, and the color change after baking at high temperature is small, and the gloss change is not large. Poor powder, poor temperature and weather resistance, after high-temperature baking, severe discoloration, dull gloss. This method is especially effective for detecting light-colored powder outdoors. Poor powder uses poor resin, titanium dioxide, poor pigments and fillers, and is resistant to temperature and weather. Low cost, shoddy. VIII. Environmental Recognition Method: SGS Environmental Testing Good powder materials are produced by big manufacturers and environmental protection is guaranteed. Poor materials and recycled powder cannot guarantee long-term environmental protection. The environmental protection SGS testing environmental protection standards will give some export companies a lot of trouble making vehicles. Powder spraying paints often do fake (stealing work) methods: 1. Selection of resins and raw materials: Epoxy and polyester are petroleum accessories. Genuine petroleum and accessories are bulk products. There are not many differences between materials from all over the country, from south to north and from west to east. The way is nothing more than shoddy, with black epoxy and black polyester material with poor raw materials 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. Poor powder resin is less than 45% of the content to shoddy, increase filler 2 yuan / KG to reduce costs. 3, the proportion of recycled powder: recycled powder is divided into floor powder, sweeping powder, powder recovered from the air duct, recycling bins of miscellaneous powder, problem powder and expired powder. Recycling powder is specially recycled, and the normal market price of recycled powder is 1-3 yuan/KG. The powder is different according to the proportion of recycled powder (100% recycled powder, 10%-80% added recycled powder), and the price is also different. On the market, the recycled powder is recycled at a price of 8 yuan/KG, 12-13 yuan. To 16-17 yuan / KG varies. The addition of recycled powder is currently the main method of counterfeiting powder coating paint. The status quo of powder spray coating: Powder spray coating is a kind of processing consumables. The investment threshold is relatively low, and the market competition is fierce. It also caused the powder spray coating market to be in disorder. The phenomenon of cutting corners is serious, and it has caused a relatively large impact on some genuine enterprises, coupled with powder spray coating. For the powdered material, it is not easy to identify and give some powdered enterprises greater economic losses. Originally, the actual usage of the product was 3 tons. By adding adulterated materials, the amount of powder was increased to 4-5 tons, which increased the cost of the powder company. Most powder companies only care about the powder and do not care about the actual use cost. , causing great losses to the company.