In recent years, powder coatings have always been very popular. They have many advantages: they are solvent-free, non-polluting, recyclable, save energy and resources, reduce labor intensity and high mechanical strength of coating films, and are therefore very popular with consumers. Then, the next small series for everyone to introduce good or bad powder coating identification.
What is powder coating
Powder coating is different from ordinary coating and it exists in the form of fine powder. Because it does not require a solvent, it is called a powder coating. Powder coatings are naturally harmless, efficient, resource-efficient and environmentally friendly.
Powder coating is good or bad
1, appearance identification method
(1) Feel: The hand feels silky smooth, loose, and floating. The hand feels rough, hands are heavy, and the hand feels heavy. Grasping a powder in the hand, the powder is smoother and looser, and the quality is good. On the contrary, the powder is rough and feels heavy. , Poor quality. It is not easy to spray.
(2) Volume: The larger the volume, the less filler in the powder coating and the higher the cost. The better the powder quality is. The smaller the volume, the higher the filler content in the powder coating and the lower the cost. The poorer the powder quality is. The same carton , Look at that one's powder bulky, is a good powder, that home's volume is small, is the poor powder. It is not easy to spray, the secondary drop powder many, the waste is big, the spraying area is small, the use cost is high.
(3) Storage time: Good powder can be stored for a long time, powder leveling and other effects are unchanged. Poor powder can not be stored for a long time, bad powder leveling deterioration and other effects become worse after 3 months. The shelf life of the powder at room temperature is 12 months, and the use of low-end raw material products is unstable and perishable. Using poor raw materials to produce powder, the sprayed surface will accelerate powdering after six months, and aging will affect customer reputation. In addition, the powder is not easy to store, causing a large waste of powder to the customer, which costs a lot of money.
2, spraying area identification method
The normal powder resin content should be about 55-65%, the resin is about 20 yuan/KG, and the filler is about 2 yuan. Some bad powder plants use less than 45% of the resin content to shoddy, increase Filler to reduce costs, reduce the spraying area. Comparison method: the same two kinds of powder sprayed the same product, look at that one of the powder coating products, that one spray product is less, spraying products is less, the use of high cost. For the use of manufacturers to spray, spraying area is small, the use of high cost. According to the calculation of per kilogram of powder spray 6 square, each less one square, equivalent to manufacturers pay more than 3-6 yuan per kilogram of powder, it is recommended to use manufacturers with genuine Powder, carefully calculate your actual use costs.
3, spraying staff work efficiency
Good powder can be easily sprayed, spraying 1-3 guns can cover the substrate, less secondary recycling powder, high work efficiency. Poor powder is not good on the powder, spraying 3-5 guns can cover the substrate , The secondary recovery of powder and more, the work efficiency is low. Operators can spray through the powder rate, the powder falling more than a few to determine. At the same time less output products, more secondary recovery of powder, increase the burden on operators, low efficiency .
4, baking identification method
A good powder does not produce a lot of smoke during the baking process. Poor powder has a lot of smoke during the baking process. Good powder raw materials do not have a lot of smoke, some manufacturers take the raw materials to fill the material. The dosage will increase, the square number will not be sprayed, increase the use cost, and the same amount of powder will produce less product.
5, finished appearance and gloss identification after baking
Good powder products have delicate appearance, fullness, transparency, and strong three-dimensional effect. Poor powder products have a dull appearance, are dull, have a hazy surface, are impenetrable, and have a poor three-dimensional appearance. The appearance of two plates is worse than observing and affects customers. Reputation, affect the appearance of the product. Good luster gloss gloss, can maintain relative luster for a long time. Poor powder gloss just baked out when the effect is good, a few months began to light. Gloss appearance detection is poor The powder made of the material can not maintain the long-term stability of the gloss, appear light, powder, paint stripping and so on.
6, adhesion and aging identification method
Good powder adhesion, strong toughness, and can maintain a few years of non-powdering, aging. Poor adhesion of the powder is poor, very brittle, 3 months to six months after spraying began aging, chalking. Contrast test adhesion And bending, and observation of the product after several months aging, chalking. Adhesion and poor aging, the product is easy to aging, chalking, rust, shorten product life, affect customer reputation.
7, high temperature identification
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 resistance and weather resistance, after the high-temperature baking, severe discoloration, dull gloss, this method is particularly effective for the detection of outdoor light-colored powder.
8, environmental identification method
Good powder materials are produced by big plants, and environmental protection is guaranteed. Poor materials and recycled powder cannot guarantee long-term environmental protection. The environmental SGS test helps to identify the environmental quality of powder coatings.
The advantages of powder coating
1. This product is non-toxic, solvent-free and contains no volatile and toxic substances;
2. The utilization rate of raw materials is high, and the highest utilization rate can reach over 99%;
3. After the pre-treatment of the object to be coated, one-time construction, without primer, can get a sufficient thickness of the coating film, easy to achieve automation, high production efficiency, can reduce costs;
4, coating density, adhesion, impact strength and toughness are good, high corner coverage, with excellent resistance to chemical corrosion and electrical insulation properties;
5, powder coating storage, transportation safety and convenience.
Editor's summary: The quality of powder coatings was introduced here. I hope to help everyone. If you want to know more related information, you can pay attention to this website information.
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