There are several ways to identify the authenticity of powder coatings.
I. Appearance identification method
1. Hand feeling
Hand feeling is silky smooth, loose, floating. Feel rough, sinking hands, feel heavy. Grab a handful of powder in the hand, the more smooth powder pent loose, good quality, and vice versa, the powder rough feel sinking, poor quality. Not easy to spray, the second fall powder more, waste big.
2. Volume
The larger the volume, the less filling material in the powder coating, the higher the cost. The better the quality of the powder. The smaller the volume, the higher the filler in the powder coating, the lower the cost. The lower the quality of the powder. The same carton, see which powder volume is good powder, which volume is small, is poor powder. Not easy to spray, the second fall powder, waste, spraying area less, the use of high cost.
3. Storage time
Good powder can be stored for a long time, the powder leveling and other effects remain unchanged. Poor powder can not be stored for a long time, poor powder 3 months after the leveling becomes worse and other effects become worse. Normal powder at room temperature shelf life of 12 months, the use of low-end raw materials, product quality is unstable, easy to deteriorate. The use of poor raw materials to produce powder, spraying surface after six months will accelerate the chalking, aging. Affect the customer's reputation. In addition, the powder is not easy to store, to the customer caused by the powder waste, the cost of more
II. Spraying area identification method
Spraying area Normal powder resin content should be about 55-65%, resin is about 20 yuan / KG, filler material is about 2 yuan. Some bad powder factory using less than 45% of the resin content to the second best, increase the filler to reduce costs, reduce the spraying area. Contrast method: two of the same powder spray the same product, see that one of the powder spraying products, that one of the spraying products less, spraying products are poor, the use of high cost. The use of manufacturers will be, spraying area less, the use of high costs. According to each kilogram of powder spraying 6 square to calculate, each less spraying a square, the equivalent of manufacturers pay 3-6 yuan per kilogram of powder, it is recommended to use manufacturers with genuine powder, carefully account for their actual cost of use
Three. Spraying personnel operation identification method
On the powder rate, work efficiency good powder is very easy to spray, spray 1-3 guns will be able to cover the substrate, the second recycling powder less, high efficiency. Poor powder is not good on the powder, spray 3-5 shots to cover the substrate, the second recovery of powder, low work efficiency. Operators can be identified by the rate of spraying on the powder, how much powder falls off. The same time output products less, more secondary recovery powder, increasing the burden of operators, low efficiency.
IV. Baking identification method
There is no smoke generated good powder in the baking process without a lot of smoke generated. Poor powder in the baking process there is a lot of smoke generated. Good powder raw materials do not have a lot of smoke, some manufacturers take the second raw materials to fill the good materials. The amount of powder will increase, the square number of spraying does not come out, increasing the cost of use, the same amount of powder output products less.
Five. After baking the appearance of finished products and gloss identification method
After baking the appearance of good powder product appearance fine, full, transparent, three-dimensional sense of strong. Poor appearance of powder products dull, dull, foggy surface, impermeable, poor three-dimensional sense. Two board surface comparison observation poor appearance, affecting the reputation of customers, affecting the appearance of products. Glossy good glossy powder, can maintain a long time relative gloss. Poor powder gloss is good when it is first baked, but it starts to sag after a few months. Glossy appearance detection of poor materials to make the powder can not maintain long-term gloss stability, appearing vector light, chalking, off paint, etc..
VI. Adhesion and aging identification method
Adhesion and aging good powder adhesion, toughness, and can maintain a few years of non-chalking, aging. Poor adhesion of the powder, very brittle, after spraying 3 months to half a year will begin to age, chalking. Contrast test adhesion and bending, and observe a few months after the product has aging, chalking. Poor adhesion and aging, the product is easy to aging, chalking, rusting, shorten the product life, affecting the reputation of customers
VII. High temperature identification method
High temperature, adjust the temperature to between 220-230 degrees, insulation 10-15 minutes good powder, temperature and weathering resistance is relatively good, by high temperature baking color change is small, the luster does not change. Poor powder, temperature and weather resistance is poor, the high temperature baking after serious discoloration, luster becomes dull. This method, the detection of outdoor light-colored powder is particularly effective. Poor powder, the use of poor resin, titanium dioxide, poor pigments and fillers, poor temperature and weathering. The cost is low, the second best.
Eight. Environmental protection identification method
SGS environmental testing of good powder materials are large factories, environmental protection is guaranteed. Poor materials and add recycled powder, there is no way to ensure long-term environmental protection does not exceed the standard. Environmental protection SGS test environmental protection exceeds the standard to some export enterprises caused greater economic losses.
IX. Analysis of the current situation of powder coating
Powder coating for processing consumables products, the investment threshold is relatively low, the market competition is fierce, but also caused the powder coating market chaos, jerry-building phenomenon is serious, the pursuit of short-term interests, to some genuine enterprises caused a relatively large impact, coupled with powder coating for the powder material, not easy to identify, to some of the larger economic losses caused by the powder enterprises. Originally the actual amount of products for the 3 tons, through the material to participate in the false, cheap price, the amount of powder increased to 4-5 tons, but increased the cost of powder enterprises, most of the enterprises with powder only care about the price of powder, do not care about the actual cost of use, causing greater losses to enterprises.
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