Coating knowledge: how to identify the quality of powder coating

Core tip: with the development and growth of powder coating, the market demand increases, and the quality of powder coating begins to vary So how should we distinguish the quality of powder coating? 1、 Appearance identification method: 1 Hand feeling: silky smooth, loose and floating Rough hand, heavy hand, heavy hand Grasp a handful of powder in hand, the smoother the powder is, the better the quality is On the contrary, the rough handle of the powder is heavy, and the quality is poor It is not easy to spray, and there is a lot of secondary powder falling, which is a waste 2 The larger the volume is, the powder coating will be filled in Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Home of coatings: with the development and growth of powder coatings, the market demand increases, and the quality of powder coatings begins to vary So how should we distinguish the quality of powder coating? 1、 Appearance recognition method: 1 The hand feel is silky, smooth, loose and floating Rough hand, heavy hand, heavy hand Grasp a handful of powder in hand, the smoother the powder is, the better the quality is On the contrary, the rough handle of the powder is heavy, and the quality is poor It is not easy to spray, and there is a lot of secondary powder falling, which is a waste 2 The larger the volume, the less the fillers and the higher the cost The better the powder quality The smaller the volume is, the higher the filler is and the lower the cost is The worse the powder quality For the same carton, look at the large size of the powder in that house, which is good powder, and the small size of that house, which is poor powder It is not easy to spray, more secondary powder falling, large waste, less spray area and high use cost 3 The powder with good storage time can be stored for a long time, and the powder leveling and other effects remain unchanged The poor powder can not be stored for a long time The leveling and other effects of the poor powder become worse after 3 months The normal powder has a shelf life of 12 months at room temperature The quality of products made of low-end raw materials is unstable and easy to deteriorate Using poor raw materials to produce powder, spraying surface will accelerate pulverization and aging after half a year Impact on customer reputation In addition, the powder is not easy to store, resulting in a large waste of powder to customers and a large amount of reimbursement 2、 Spray area identification method: the resin content of normal spray area powder should be about 55-65%, the resin is about 20 yuan / kg, and the filler is about 2 yuan Some poor powder factories use less than 45% resin content to replenish the inferior, increase the filler to reduce the cost and spray area Comparison method: two same powder spraying products, which one has more powder spraying products, which one has less spraying products, and which one has less spraying products is poor, with high use cost For the user, the spraying area is small, and the use cost is high According to the calculation of 6 square meters per kilogram of powder spraying, one square meter less spraying is equivalent to 3-6 yuan more per kilogram of powder paid by the manufacturer It is recommended that the manufacturer use genuine powder, and carefully check the actual use cost Theoretical spraying area 8-10 square meters, 6-8 square meters, actual spraying area 4-6 square meters, 3-5 square meters, using cost 3-6 yuan, 4-8 yuan per square meter, operation identification method of spraying personnel: powder loading rate, powder with good working efficiency is easy to spray, spraying 1-3 guns can cover the substrate, less secondary recovery powder, high working efficiency Poor powder is not good for powder application Only spray 3-5 guns can cover the base material There are many recycled powder and low working efficiency The operator can determine the powder rate by spraying, and the amount of powder dropped is not much At the same time, the output of products is less, the secondary recovery of powder is more, the burden of operators is increased, and the work efficiency is low 4、 Baking identification method: whether there is a good powder produced by smoke and not a lot of smoke produced in the baking process Poor powder has a lot of smoke during baking Good powder raw materials do not produce a lot of smoke, some manufacturers take the raw materials to fill the materials The amount of powder will increase, the square number can not be sprayed out, increasing the use cost, the same amount of powder will produce less products 5、 Identification method of finished product appearance and luster after baking: the powder product with good appearance after baking has fine appearance, full, transparent and strong three-dimensional feeling The appearance of poor powder products is dim, rigid, foggy and opaque, with poor stereoscopic sense The appearance of the two boards is poor, which affects customer reputation and product appearance The powder with good glossiness has good glossiness and can keep relative luster for a long time The poor powder glossiness is good when it is baked out, and it will start to shoot in a few months The powder made of materials with poor gloss appearance test can not maintain long-term gloss stability, such as sagittal light, pulverization, paint removal, etc 6、 Adhesion and aging identification method: the adhesion and aging powder have strong adhesion and toughness, and can keep non pulverization and aging for several years The poor powder has poor adhesion and is very brittle It will be aged and powdered from 3 months to half a year after spraying Contrast test adhesion and bending, and observe whether the product is aged and powdered after a few months Poor adhesion and aging, easy aging, powdering, rusting, shortening the service life of products, affecting customer reputation 7、 High temperature identification method: high temperature, adjust the temperature to 220-230 degrees, heat preservation for 10-15 minutes good powder, good temperature and weather resistance, small color change after high temperature baking, little change in gloss Poor powder, poor temperature and weather resistance, serious discoloration and dullness after high temperature baking This method is particularly effective for detecting light colored outdoor powder Poor powder, poor resin, titanium dioxide, poor pigment and filler, poor temperature and weather resistance Cost is low, inferior is better 8、 Environmental protection identification method: SGS environmental protection testing of good powder materials are large-scale production, environmental protection is guaranteed There is no way to ensure that the environmental protection does not exceed the standard for a long time for poor materials and recycled powder Environmental SGS detection of environmental protection exceeding the standard has caused great economic losses to some export enterprises 9、 The way of powder coating often making fake (Jerry built): 1 Selection of resin and raw materials: epoxy and polyester are accessories of petroleum, authentic petroleum and accessories are bulk products, and the price of materials is similar all over the country, from south to north, from west to East The way to make fake materials is to substitute inferior ones Black epoxy and black polyester with poor raw materials are used to replace good materials, which are the same in all walks of life 2 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 lower than 45% to make it better, and the cost and spraying area can be reduced by adding 2 yuan / kg of filler 3 Add proportion of recycled powder: the recycled powder is divided into floor powder, sweeping powder, recycled powder from the air duct, recycled powder in the recycling box, problem powder and expired powder The recycled powder is recycled by specially assigned person The normal market price of recycled powder is 1-3 yuan / kg The powder is added according to the proportion of recycled powder: 100% recycled powder, 80% - 10% added, and the prices are different The recycled powder in the market is added according to the proportion of powder The final price is 8 yuan / kg 12-13 yuan to 16-17 yuan / kg are different Adding recycled powder is the main way to make fake powder coating 10、 Analysis of the present situation of powder coating Powder coating is a kind of consumable product for processing The investment threshold is relatively low, and the market competition is fierce, which also causes the powder coating market to be disorderly, the phenomenon of stealing work and reducing materials is serious, the pursuit of short-term interests, which has a relatively big impact on some genuine enterprises In addition, the powder coating is a powder material, which is not easy to identify, causing a large economic loss to some powder using enterprises If the actual consumption of the original product is 3 tons, it is cheap to increase the consumption of powder to 4-5 tons through material reference, but it increases the cost of the powder using enterprises Most of the powder using enterprises only care about the price of powder, and do not care about the actual cost of use, causing great losses to the enterprises Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,