I. Appearance identification method
1. Hand feeling: hand feeling is silky smooth, peng loose, floating. Feel rough, sinking hands, feel heavy. Grab a handful of powder in the hands, the smoother the powder pescado, good quality, and vice versa powder rough feel heavy, poor quality, not easy to spray, the second fall powder, waste.
2. Volume: the larger the volume, the less filler within the powder coating, the higher the cost, the better the quality of the powder. The smaller the volume, the higher the filling material within the powder coating, the lower the cost, the worse the quality of powder. The same carton, see which one's powder volume is big, is good powder. Which is the volume of small, is poor powder. Not easy to spray, the second fall powder more, waste, spraying area less, the use of high cost.
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 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 powder, aging, affecting the reputation of customers. In addition, the powder is not easy to store, causing a large waste of powder to the customer, reporting more costs.
Second, the spraying area identification method
Spraying area: normal powder resin content should be about 55-65%, resin is about 20 yuan / KG or so, filling material is about 2 yuan. Some bad powder factory using less than 45% of the resin content to the second best, increase the filler material to reduce costs and reduce the spraying area.
Contrast method: two of the same powder spray the same product, see which one of the powder spraying products, which one of the spraying products less, spraying products are poor, the use of high costs. To use manufacturers, 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 that manufacturers use genuine powder, carefully account for their actual cost of use.
Third, spraying personnel operation identification method
On the powder rate, work efficiency of good powder is extremely easy to spray, spray 1-3 guns can 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 secondary recovery of powder, low efficiency. Operators can be identified by spraying on the powder rate, how much powder falls off. The same time output products less, more secondary recovery powder, increase the burden of operators, low efficiency.
Fourth, baking identification method
There is no smoke, good powder in the baking process without a large amount of smoke, poor powder in the baking process with a large amount of smoke generated. Good powder raw materials without 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, the appearance of finished products after baking and gloss identification method
After baking the appearance of good powder products, the appearance of 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, the appearance of poor, affecting the reputation of customers and the appearance of the product. Glossy good powder glossy good, can maintain a long time relative gloss. Poor powder gloss just baked out when the effect is good, after a few months began to lose light. Glossy appearance detection of poor materials to make the powder can not maintain long-term luster stability, appear vector light, chalking, off paint, etc..
Sixth, adhesion and aging identification method
Adhesion and aging, good powder adhesion, toughness, and can maintain several years of non-chalking, aging. Poor adhesion of the powder is poor, very brittle, 3 months to 6 months after spraying began to age, chalking. Contrast test adhesion and bending, as well as observe a few months after the product has no aging, chalking. Poor adhesion and aging, the product is easy to aging, chalking, rust, shorten the product life, affecting the reputation of customers.
Seven, high temperature identification method
High temperature, adjust the temperature to between 220-230 degrees, insulation 10-15 minutes, good powder temperature and weather resistance is relatively good, by high temperature baking color change is small, gloss change is not large. Poor powder, temperature and weather resistance is poor, by high temperature baking after serious discoloration, luster becomes dull. This method, 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 weather resistance, low cost, second best.
Eight, environmental identification method
SGS environmental testing, good powder materials are produced by 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.
Nine, the current situation analysis of powder coating
Powder coating for processing consumables products, the investment barrier is relatively low, the market competition is fierce, also caused the powder coating market chaos, jerry-built phenomenon is serious, the pursuit of short-term interests, to some genuine enterprises caused a relatively large impact, coupled with powder coating for powder substances, bad identification, to some with powder enterprises caused by the larger economic losses. 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 the enterprise with powder, 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 the enterprise.