News

Traditional Chinese colors are not only an accurate interpretation of the beauty of nature, but also a bond with all things in the world. In the eyes of the ancients, the beauty of traditional Chinese colors is deeply rooted in the natural time sequence, and the four seasons, the solar terms, and the withering of plants and trees can all depict their vividness and agility through color.     In WANAN's color universe, with the turn of time, the rise and fall of color is also in the ever-changing. WANAN uses powder paint as a pen to paint the colorful five-color moments, each color embodies our awe and love for nature.     When the morning light is slightly dewed, a red glow spreads at the end of the earth. The morning glow is full of red, and it is the first good morning greeting from the sky to the awakening city.     Red is the color of the morning glow, a color with strong vitality, and a representative color of a sense of strength. Wan'an red series of powder coatings freeze the color of the red like the morning glow of the fire, the natural sincerity and enthusiasm into life, is an excellent interpretation of the force and beauty in the field of construction machinery, widely used in bulldozers, excavators, rollers and other parts of the coating, to give construction machinery an endless sense of strength.     In the quiet of the morning, the mist covered the land like a light veil. The green mountains loom in the misty clouds, painting a fairyland-like ink painting of the earth.     The hustle and bustle of daily life always disturbs the soul, and only when you return home can you feel a relaxed and comfortable atmosphere. The appropriate white space of the indoor furniture carries a sense of relaxation after being busy. Wan'an white series powder coating freezes the lightness and elegance of clouds and mist with color, so that the poetry and painting of nature shine into reality, bringing more relaxation space to life.     The sun is rising, and the first rays of golden light in the morning pierce the sky, quietly waking up the sleeping world. Every sunrise is a new beginning, a symbol of hope, and the most beautiful gift that nature has given us.     The energetic WANAN yellow series powder coatings convey a positive attitude towards life and are widely used in household appliances and cabinets. Each touch of intense yellow is full of WANAN's expectations for a better life, inspiring us to go to the future with an optimistic and positive attitude.     The first breeze of the morning blows across the earth, waking up the sleeping plants and trees, and a beautiful day is quietly "sprouting".     The WANAN green series powder coating freezes the color of vibrant plants and trees on the substrates such as profiles, glass, and plastic steel, and paints a beautiful and fresh natural background color for the field of building materials. With fresh colors rooted in nature, it conveys the healing energy of nature.     There are 24 solar terms in a year, 12 hours a day, every season, every day, every hour, there are moving colors everywhere. WANAN powder coats the beauty of time with color, and reproduces the gorgeous colors of the time in the form of products, showing the infinite charm of time; With the color aesthetic concept of "color without boundaries", every moment of life is full of unique and charming brilliance.  

Powder coating is widely used in various hardware and software in our lives, such as: aluminum profiles, small household appliances, mobile phones and computers, dining seats, children's toys, kitchen utensils, sports equipment, Wujinjiaodian, indoor and outdoor buildings, photovoltaic equipment, large, medium and small cars, high-speed rail, aircraft, military materials and new energy fields, etc., which are widely used in all workpieces needed in our lives. The performance requirements in low-temperature powder coating are mainly reflected in the high-temperature curing of 180 °C-220 °C (low temperature understanding: 110 °C-150 °C) that no longer requires traditional powder coatings, and the specific performance of low-temperature powder coating is reflected in: food-grade non-toxic and tasteless, with special surface effect, scratch resistance, high hardness, aging resistance, yellowing resistance, no VOC, no formaldehyde, no heavy metals, no BPA, waterproof, moisture-proof, mildew-proof, stain-resistant, easy to clean, colorful and multi-colored, How to improve the quality of low-temperature powder coating again in the later stage, using advanced coating equipment and technology, and how to adapt to the development of low-temperature powder coating still need a long way to go for the industry. The requirements for coating in the furniture industry are also getting higher and higher, and the current consumers' requirements for indoor furniture are also odorless furniture and furniture products with zero VOC volatilization. So we have also seen this development phenomenon, and in recent years, many large enterprises have fully used low-temperature powder coating products.   The "low-carbon economy" is an economic model based on low energy consumption, low pollution and low emissions, and is another major progress of human society after agricultural civilization and industrial civilization. The essence of the "low-carbon economy" is the efficient use of energy, the development of clean energy, and the pursuit of green GDP, and the core is the fundamental transformation of energy technology and emission reduction technology innovation, industrial structure and institutional innovation, and the concept of human survival and development. The concept was first introduced in government documents in 2003 in the UK's Energy White Paper, Our Energy Future: Creating a Low-Carbon Economy. However, it was not until the 2009 Copenhagen climate conference that the "low-carbon economy" jumped back into people's attention and gained attention. In 2011, "low-carbon and energy-saving" will become a new concept of environmental protection for powder coating enterprises. The traditional powder coating industry is considered to be a large consumer of energy and carbon emissions, and has great potential for energy saving and carbon emission reduction. "Low carbon" means that not only the coatings produced are green and environmentally friendly, but also the principle of low energy consumption must be adhered to in the selection of raw materials and the production process. The low-temperature powder coating industry will transform from the traditional high-temperature powder coating industry to a modern industrial branch with high technology and low energy consumption.   10 years of low-temperature powder coating industry is almost over, low-temperature powder coating enterprises will go how far and how high, in fact, it depends on the enterprise itself in research and development, production and manufacturing more persistence, the application of low-temperature powder coating may be far more exciting than the author predicted, everything depends on the research and development progress of our coating chemical industry doctoral elites, the author will be with the elites of the coating industry looking forward to another better year for the low-temperature powder coating industry.

The Dragon Boat Festival is a traditional Chinese festival that is usually celebrated on the fifth day of the fifth lunar month. There are many traditional sayings about why you should eat zongzi, and here are a few of the common explanations:   Commemoration of Qu Yuan: The most widely accepted theory is that zongzi was eaten in honor of Qu Yuan, a patriotic poet in ancient China. It is rumored that Qu Yuan was a minister and poet of Chu during the Warring States Period, who was treated unfairly because of his loyalty to the country, and eventually committed suicide by throwing himself into the river to express his anxiety and helplessness for the country. In order to prevent fish and shrimp from eating Qu Yuan's corpse, people threw various foods into the river, including glutinous rice wrapped in dumpling leaves. Later, this custom gradually evolved into the tradition of eating zongzi.     Ward off evil spirits and avoid epidemics: Another theory is that the fifth day of the fifth month of May is the time when yang energy is at its peak, and this time coincides with the most rampant viruses and evil spirits. Folks believe that eating zongzi can drive away evil spirits and avoid epidemics and protect the body from diseases. Because of the special aroma of the outer layer of zongzi leaves, zongzi is believed to have the effect of warding off evil spirits.   Avoid spoilage: The fifth day of May is also the time when the weather gets hotter, which can easily lead to food spoilage. Traditional zongzi is made by wrapping glutinous rice and various fillings in zongzi leaves and then boiling or steaming them. This wrapping and cooking method ensures that the rice dumplings stay fresh for a longer time in the outdoor environment and avoid food spoilage.     In general, eating zongzi has become one of the important customs of the Chinese Dragon Boat Festival. Whether it's to commemorate Qu Yuan, ward off evil spirits or avoid corruption, eating zongzi is a way for people to reunite, celebrate, and pray for blessings during this festival. Zongzi has a variety of different tastes and practices in different regions and families, and is an indispensable part of traditional Chinese culture.

In the era of environmental protection storm, the development of environment-friendly coatings is the inevitable choice of enterprises, but environmentally friendly coatings are not only water-based coatings, if enterprises swarm to develop water-based coatings, it is inevitable that there will be product homogenization. In addition to water-based coatings, high-solids coatings, solvent-free coatings, and powder coatings are also environmentally friendly coatings, which should become the key development direction of the coatings industry. The general situation of powder coating 1. Introduction to powder coating Powder coating began in the 50s of the last century, is a solid content of 100%, and no organic volatile compounds (VOCs) produced by environmentally friendly coatings, with energy saving, pollution reduction, simple process, easy to achieve industrial automation, excellent coating performance and other characteristics. Powder coatings are powdered coatings composed of polymers, pigments, fillers, and additives. Because there is no volatilization of liquid medium, it has good ecological and environmental protection; Powder coating can form a thicker coating in one pass, which has extremely high production efficiency; The mechanical properties and chemical resistance of powder coatings are excellent, and they have excellent coating properties; The use of powder coating can save energy and resources, and the utilization rate can reach 99%, which is safe to use and has outstanding economy; Therefore, as a solvent-free coating, powder coating conforms to the internationally popular "four E" principles of economy, environmental protection, high efficiency and excellent performance. 2. Overview of the powder coating market With the growing demand for electrical appliances and light vehicles, the demand for powder coatings has increased. The growing demand from the end-use industry in developed and emerging countries is also triggering the growth of the powder coating market.   Thanks to the joint promotion of a number of factors, especially the rapid development of urbanization and the joint growth of housing, construction and automobiles, the growth rate of China's powder coating market demand ranks first in the world, and the rapid development of powder coating will inevitably drive the growth of powder filler demand. Analysis of the application of different powder materials in powder coatings Fillers in coatings can not only reduce their costs, but also play a great role in improving the performance of coating products. For example, improve the wear resistance and scratch resistance of the coating film, reduce the sagging of the coating when it melts and runs, improve the anti-corrosion performance, and improve the moisture resistance. Factors such as density, dispersion performance, particle size distribution, and purity need to be considered when selecting fillers for powder coatings. In general, the higher the density, the lower the powder coating coverage; The dispersion of large particles is better than that of small particles; The filler is chemically inert and avoids reacting with certain components of the powder formulation, such as pigments; The color of the filler should be as white as possible. The powder materials commonly used in powder coating mainly include calcium carbonate, barium sulfate, talc, mica powder, kaolin, silica, wollastonite, etc. 1. Application of calcium carbonate in powder coatings Calcium carbonate is divided into light calcium carbonate (precipitated calcium carbonate) and heavy calcium carbonate. Regardless of the type of calcium carbonate and the method used to produce it, different particle sizes strongly affect the gloss of the coating. In addition to being used for increment, heavy calcium is mainly used to partially replace titanium dioxide and color pigments, replace light calcium and precipitate barium sulfate, anti-corrosion and partially replace anti-rust pigments. When heavy calcium is used in interior architectural paints, it can be used alone or in combination with talcum powder. Compared to talc, calcium carbonate reduces the rate of chalking, improves color retention and increases mold resistance in light-colored paints. However, due to poor acid resistance, it hinders its application in topical coatings. Compared with heavy calcium, light calcium has a small particle size and narrow particle size distribution range, high oil absorption and brightness, and light calcium can be used where the maximum matting effect is required. 2. Application of barium sulfate in powder coatings There are two kinds of barium sulfate used as pigments for paint bodies: natural and synthetic, the natural product weighs spar powder, and the synthetic product is called precipitated barium sulfate. In powder coatings, precipitated barium sulfate can enhance the leveling and gloss retention of powder coatings, and has good compatibility with all pigments. It can achieve the ideal coating thickness in the spraying process and the powder application rate is high.   Barite powder fillers are mainly used in industrial primers and automotive intermediate coatings that require high film strength, high filling force and high chemical inertness, as well as in topcoats that require high gloss. In latex paints, due to the high refractive index of barite (1.637), fine barite powder can have the function of translucent white pigment, which can replace part of titanium dioxide in the coating. 3. Application of mica powder in powder coatings Mica powder is a complex silicate composition, the particles are flake-like, with excellent heat resistance, acid and alkali resistance, which has an impact on the melt fluidity of powder coatings, and is generally used in temperature-resistant and insulating powder coatings, and can be used as fillers for texture powders. Among the many mica-like minerals, the chemical structure of sericite is similar to that of kaolin, and it has a variety of characteristics of mica minerals and clay minerals. When applied in coatings, it can greatly improve the weather resistance and water permeability of the coating film, enhance the adhesion and strength of the coating film, and improve the appearance of the coating film. At the same time, the dye particles are easy to enter the lattice layer of sericite powder, so as to maintain the color for a long time. In addition, sericite powder also has the function of anti-algae and mildew. Therefore, sericite powder is a multifunctional filler with excellent price-performance ratio for coatings. 4. Application of talcum powder in powder coatings Talc, also known as aqueous magnesium silicate, is made by direct crushing of talc. The particles are needle-like crystals, have a slippery feeling, soft texture and low abrasiveness, have good suspension and dispersion and a certain thixotropy, which has a great impact on the melt fluidity of powder coatings, and are often used in texture powders. At present, it is used in various primers, intermediate coatings, road sign paints, industrial coatings and architectural coatings for interior and exterior use.   Talcum powder is inexpensive, but it has drawbacks and is therefore used in limited quantities. First of all, the oil absorption is larger. In the case of low oil absorption, it must be combined with fillers and barite powder with low oil absorption; Secondly, the wear resistance is not high, and other fillers should be added to make up for the occasion that high wear resistance is required; In addition, talcum powder containing other non-metallic minerals is not suitable for external coatings requiring high weather resistance because impurity minerals are easy to react with acids (such as acid rain); In addition, talc has matting properties, so it is generally not used in high-gloss coatings. 5. Application of silica in powder coatings Porous powder quartz is a kind of silica system, which is recognized as safe to use, and has been widely used in powder coatings, fire retardant coatings, waterproof coatings, anti-corrosion coatings, etc. Cheap porous powder quartz can reduce the cost of powder coatings, and at the same time replace barium sulfate to reduce the content of soluble barium in the product, which meets environmental protection requirements. In addition, fumed silica is often used as a loose and anti-caking additive for powder coatings. Fumed silica is a multifunctional pigment and a rheology control agent for coatings with excellent performance. In liquid coatings, its rheological control functions include: thickening, thixotropy, anti-sagging, covering edges; In solid powder coating systems, the free flow of powders is enhanced, and caking and fluidization are prevented. 6. Application of kaolin in powder coatings Kaolin can improve thixotropy and sedimentation resistance. Calcined clay has no effect on rheological properties, but can have the same matting effect, increased coverage and increased whiteness as untreated clay, which is similar to talc. Kaolin generally has high water absorption, which is not suitable for improving the thixotropy of coatings and is not suitable for the preparation of hydrophobic coating films. The particle size of kaolin products is between 0.2 and 1 μm. Kaolin with large particle size has low water absorption; Kaolin (less than 1 μm) with good matting effect and small particle size can be used for semi-gloss coatings and internal coatings.   Kaolin can be divided into calcined kaolin and washed kaolin. Generally speaking, the oil absorption, opacity, porosity, and hardness of calcined kaolin are higher than those of washed kaolin. 7. Application of hollow glass beads in powder coatings Hollow glass beads are a tiny, hollow spherical powder, which has the advantages of light weight, large volume, low thermal conductivity, high compressive strength, insulation, corrosion resistance, non-toxicity, dispersion, fluidity and stability. When used in powder coatings, hollow glass beads can do the following: (1) Low heat insulation, insulation, and water absorption. The inside of the hollow glass beads is a vacuum or thin gas, and there is a difference in density and thermal conductivity between the epoxy resin and the epoxy resin, so it has the characteristics of heat insulation, and is an excellent filler for high-temperature resistant powder coatings. (2) It can improve the physical and mechanical properties of powder coating. Hollow glass bead fillers increase the hardness and stiffness of powder coatings. However, the impact resistance decreases, and the decline is related to the surface treatment of insulating glass beads. Pretreatment with the right coupling agent can reduce the impact impact of the material. (3) Low oil absorption. The oil absorption rate of different types of hollow glass beads per 100g is between 7mg~50mg, and this low oil absorption rate filler material increases the filling amount in disguise during the production process and reduces the comprehensive cost. 8. Application of wollastonite in powder coatings The main component of wollastonite is calcium silicate, with a density of 2.9g/cm3, a refractive index of 1.63, and an oil absorption of 30~50%, which has a needle-like structure and good brightness.   Powder coatings are generally made of natural wollastonite powder, which is processed from natural wollastonite. Wollastonite can be used as a physical pigment and replace some white pigments in coatings, playing a role in covering and incrementing, and reducing the cost of paint. Because of its good electrical conductivity, it is often used in epoxy insulation powder coatings. Wollastonite has a white needle-like structure that improves the flexural and tensile properties of powder coatings. The development trend of powder fillers for powder coatings 1. Surface treatment of powder filler Powder coating fillers are polar, while powder coating resins are extremely polar, which will cause poor compatibility between the two, which will have a negative impact on powder coating processing and coating performance. Therefore, it is usually necessary to treat the powder filler by physical methods (surface coating and surface adsorption) or chemical methods (surface substitution, hydrolysis, polymerization and grafting, etc.), so that the particle diameter of the aggregate can be significantly reduced or the fluidity of the system can be improved, and the processing performance, apparent quality (such as gloss, color brightness, etc.) and mechanical strength of the coating can be improved. 2. Powder filler is fine When the ratio of powder coating resin to filler is constant, theoretically, the smaller the particle size of the filler, the better the surface properties and mechanical properties of the coating film. If the particle size of the filler is reduced to a level similar to the particle size of titanium dioxide (0.2~0.5μm), the polycarbonated titanium produced in the formula can be isolated, more effective dispersion centers can be formed, and the hiding power of titanium dioxide can be improved, which is the spatial separation principle of the fine filler. Similarly, micro-refinement fillers can also reduce the amount of pigment used. 3. Nanotechnology of powder filler The most commonly used nanomaterials are nano-silica, nano-titanium dioxide, and nano-calcium carbonate. It is reported that nano titanium dioxide has transparency, can improve the mechanical properties and ultraviolet absorption of coatings, and can be used in automotive overlay varnishes, which can significantly improve the weather resistance of powder coatings. Because nanomaterials are very fine particles, the surface activity is quite high, and it is easy to agglomerate and flocculate, so the surface treatment of nano fillers, the selection of adding methods and dispersion equipment, the amount of nanomaterials added in powder coatings, and how to disperse into the base resin are the key to the application of nanomaterials in powder coatings. In the design of powder coating formulation, different fillers can be selected according to the product performance requirements to achieve the best results. 4. Functionalization of powder coating filler The development direction of functionalized powder coating is to improve the physical, chemical and mechanical properties of some aspects of powder coating, or to give powder coating a new function. For example, kaolin and wollastonite powder powder are used in the production of electrically insulating powder coatings, which can not only reduce the cost of powder coatings, but also improve electrical insulation. Aluminum hydroxide and magnesium hydroxide have flame retardant effects, which can be made into flame retardant powder coatings, and can also control rheology, improve adhesion, control gloss, improve hiding power, etc. Therefore, the fillers for powder coating should shift from simple cost reduction to other functional research, and develop more new fillers with excellent performance and low price to meet the needs of the continuous development of powder coatings.   Powder coating is an energy-saving, resource-saving, low-pollution environmentally friendly coating. Due to the increasing demand for energy in countries around the world, reducing energy consumption and protecting the environment have become the main development directions. Therefore, the development of powder coatings that can be cured at low temperatures, have high weather resistance, are highly decorative and can be applied thinly will be the main development direction in the future. Driven by the demand for powder coatings, the demand for powder fillers such as calcium carbonate, quartz, mica powder, talc, and kaolin will inevitably increase. And the requirements for the fineness, functionalization, and surface modification of powder fillers are getting higher and higher.

The super equipment of the "infrastructure madness", There must be wanton power, but also anti-manufacturing paint.     Behind the reputation of "infrastructure madness", there is an indispensable main force - construction machinery. As the super equipment of the "infrastructure madness", construction machinery is facing the challenges of extreme working environment while bearing a huge workload, and in the face of various unfavorable factors, it is necessary to have wanton power and anti-manufacturing coating.     In practical application, due to the differences in local climate, construction machinery has been exposed to different temperatures and humidity in the outdoor environment for a long time, wind and sun, rain and snow, and various chemical corrosion that may be faced in the construction process, which will cause wear and tear on the coating of construction machinery, shorten its service life, and even cause safety accidents.       The weathering resistance and anti-corrosion of ordinary construction machinery coatings are difficult to meet the needs for a long time, so the market has put forward higher expectations for the coating protection of construction machinery.     WANAN Group has a testing center that has obtained CNAS authoritative certification, and its product testing capabilities have reached the national leading level. After testing, the impact resistance, damp heat resistance, salt spray resistance, acid and alkali resistance and aging resistance of WANAN construction machinery powder coating performance is stable, and the coating is not foaming, not pulverizing, wrinkling and not falling off in the face of sediment erosion, acid and alkali corrosion and other working environments for a long time, providing long-term protection for construction machinery and effectively extending the service life of the product.     Due to the complex shape, size and sharp corners of construction machinery components, the requirements for coating performance and coating process are higher and more complex.       Compared with traditional coatings, WANAN Construction Machinery powder coatings can achieve one-time spraying molding, with a high degree of automation, fast curing speed, saving the amount of paint and spraying coatings to achieve a recycling rate of more than 99%. Improve the coating efficiency, make the construction machinery products achieve better corner coverage, and continue to provide environmental protection coating solutions for the construction machinery industry to reduce costs and increase efficiency.       According to the different needs of customers for the painted surface, WANAN Group can tailor construction machinery powder coatings with rich colors, gloss and texture, which are widely used in cabs, hoods, ladders, benches and other construction machinery parts; Excellent yellowing resistance, gloss retention and color retention performance can ensure the durability and beauty of construction machinery coating products.       While realizing the high performance of the coating, it restores and cures the beauty of color, meets the diversified aesthetic needs of the market with excellent visual expression, and provides more possibilities for the appearance design of construction machinery and equipment.

Powder coating is a solid powder coating composed of solid resin, pigment, filler and additives, etc., which is mostly used for anti-corrosion construction. Compared with ordinary solvent-based coatings and water-based coatings, the dispersion medium of solvent-based coatings is different, the dispersion medium of solvent-based coatings is organic solvent, the dispersion medium of water-based coatings is water, and the dispersion medium of powder coatings is air. Since powder coatings basically do not contain organic solvents, they are environmentally friendly coatings, and they have been vigorously promoted in the field of environmental protection. In addition to the characteristics of environmental protection, powder coatings also have the advantages of reusability and high comprehensive utilization. The principle of electrostatic spraying is to use the high-voltage electrostatic corona electric field to connect the high-voltage negative electrode on the metal deflector mark at the head of the spray gun, and the sprayed workpiece is grounded to form a positive electrode, so that a strong electrostatic electric field is formed between the spray gun and the workpiece. When the powder coating is sent from the powder supply barrel to the deflector rod of the spray gun through the powder pipe as the compressed air used as the carrying gas, due to the corona discharge generated by the high-voltage negative electrode connected to the deflector rod, a dense negative charge is generated near it, so that the powder is negatively charged and enters the electrostatic field with high electric field strength. Under the dual action of electrostatic force and carrier gas, the powder evenly flies to the surface of the grounded workpiece to form a uniform powder layer, which is then heated and solidified into a durable coating film. Good powder coating is very easy to spray, spraying 1-3 guns can cover the substrate, less secondary recovery powder, high work efficiency. Poor powder coating is not easy to powder, spray 3-5 guns to cover the substrate, secondary recovery powder is more, and the work efficiency is low. By recycling and then constructing, the comprehensive utilization rate of good powder coating can reach 99%. For powder coating, we must not ignore the importance of the first-time powder rate. The powder coating rate generally refers to the powder coating coverage, under the premise of ensuring the appearance and mechanical properties of the powder coating film, the amount of powder coating consumed per unit profile, that is, the production cost. Therefore, the powder loading rate of powder coating is a very important factor, and it is a technical index determined by a variety of factors. So how can you improve the powder coating rate?   1. Control the particle size distribution of powder coating, the narrower the better   Because the particle size of the powder coating is related to the charge charge, the larger the particle size, the greater the charge charge, if the particle size distribution of the powder coating is uneven, there will be a large particle size to reach the surface of the sprayed object first, and the small particle size will arrive or can not arrive, so that the powder rate is reduced at one time, and it is easy to appear the appearance quality problem of the paint film. Therefore, it is necessary to control the particle size of the powder coating within a certain range, not too big nor too small, each enterprise will formulate its own standards according to the needs of downstream customers, and the general particle size is about 40-50μm.   2. Increase the resin content   Among the components of powder coatings, resin, as a polymer compound, has the highest dielectric constant, and pigments, fillers and other dielectric constants are low. If there are more substances in the powder coating with a higher dielectric constant, the powder rate will be increased when spraying, but it will also increase the cost, and the coating company needs to configure the resin content according to customer needs.   3. Reasonable choice Pigment and filler fineness and dispersion have a lot to do with powder loading. Pigments and fillers with uniform fineness and good dispersion can improve the primary powder rate.   4. Indispensable conductive additives   Conductive additives can make powder particles carry more charge, so it is necessary to pay attention to the addition of conductive additives in the formulation design. Especially for parts such as groove dead corners, due to the weak power line of the Faraday effect, the powder particles with more charge can reach the surface of the workpiece by their own force, thus improving the powder loading rate of these parts.   5. Spraying process conditions   Due to the difference between the climate between the north and the south, and the different temperature and humidity characteristics in winter and summer, it will affect the powder rate to some extent, so it is necessary to design a relatively stable temperature and humidity, a relatively clean spraying environment, a relatively stable voltage, a more appropriate spraying spacing, a suitable air pressure, and a good grounding of the workpiece.   6. Suitable spray gun   The primary powder rate is related to the type of spray gun, the process parameters, the shape of the workpiece, and the spraying method. Many companies only pay attention to the maximum powder output of the spray gun, in fact, the compressed air output and air pressure increase, the powder output can be increased. However, it is a question whether the high-voltage electrostatic generator can charge so much powder. In the case of spray guns, dense powders block each other's path to charging, leaving the powder behind uncharged, or charged, with very little charge. From the point of view of the spraying process, when the coating surface reaches electrostatic equilibrium, the powder particles that come behind and the particles on the coating surface will repel each other, and even fall against the opposite movement of ionization, and be recovered by the recovery equipment. Therefore, the amount of powder output should be measured according to the charged capacity of the spray gun, and whether the powder is fully charged should be considered, and according to the shape of the sprayed workpiece, according to repeated experiments. In addition, if the workpiece has grooves, grooves, sharp corners, small holes and other shapes, it will produce Faraday shielding phenomenon, and the sprayed coating will be very thin and leak the bottom.

What is a green coating?     Environmental protection coating It refers to the coating products whose performance indicators and safety indicators meet the respective product standards and meet the technical requirements of national environmental labeling products.     The so-called green environmental protection coating refers to the human body and the living environment with non-toxic, harmless, heat insulation, flame retardant, anti-ultraviolet, anti-radiation, insect-proof, anti-poison and other special functions, its hardness, finish, moisture-proof, breathable, frost-resistant, rub-resistant, moisture-resistant, corrosion-resistant and strong adhesion and other properties are very obvious, and its service life is more than five years longer than traditional coatings. It is especially harmless to human health, and is especially suitable for a high-performance coating for the exterior walls of buildings that are picky about climate, moderation and sunshine. Green paint is not absolutely free of harmful substances, but to minimize the harm to human health, just to say that it is low pollution rather than no pollution. The harmful substances in the coating basically come from additives, generally speaking, the raw materials of the coating are not toxic, but the product must add some volatile agents, solvents, etc. These additives contain volatile harmful substances. Eco-friendly coatings can also reduce exhaust emissions and radioactive pollution, reduce energy consumption, and improve the reuse rate of resources.     Harmful organic volatiles and heavy metal salts and other components must not be added to green paints, and must be odorless, non-toxic and pollution-free through professional demonstration. When the construction is painted, it is simple, time-saving, trouble-free, the plane is smooth and smooth, and the decorative effect is beautiful and generous. Green coatings are in short supply in China's market and have been vigorously promoted.     People's awareness of environmental protection is increasing, and the quality of paint products is getting higher and higher, therefore, unenvironmentally friendly, unsafe coating products will be spurned by consumers, and the coatings that meet the needs of people will be green, environmentally friendly, and can replace the traditional solvent-based coatings with serious pollution, which is conducive to enhancing people's health and improving people's living environment. It is also important for the home environment to be safe, environmentally friendly and promote the sustainable development of society.   Market Overview According to data from market research institutions, the global green paint market will reach 546.109 billion yuan (RMB) in 2022, and the global green paint market is expected to reach 809.934 billion yuan by 2028, with a compound annual growth rate of 6.74% during the forecast period. According to the research of internationally renowned institutions, in the past two decades, environmentally friendly coatings have achieved a very stable growth rate in Asian countries. As a major coatings country in the Asia-Pacific region, the Indian paints and coatings market has great potential, with turnover likely to increase from $8 billion to $12 billion per annum in the coming years, with India's eco-friendly coatings market being one of the fastest-growing segments of the entire paints and coatings industry. In China, the market size of environmentally friendly coatings has reached 26.663 billion yuan in 2019, a year-on-year increase of 20.3%. It is estimated that by 2025, the market size will reach 37.943 billion yuan, with a compound annual growth rate of 5.3%. Among them, architectural coatings and automotive coatings are the two main areas of the market, and architectural coatings have the largest demand for environmental protection, accounting for about 40% of the total market. In recent years, the competition in China's environmental protection coating industry has been fierce, mainly by international brands to occupy the vast majority of the market share, but local companies are also trying to challenge. Although the entry threshold of the environmental protection coating industry is not high, small enterprises can also enter the market competition, but due to the small scale and limited technical level, it is difficult to break through the monopoly position of foreign brands at this stage.   Categories and properties of green paints Experts at home and abroad mainly focus on the following aspects in the research and development of green products: water-based coatings, powder coatings, high-solid powder coatings, and have achieved good results. Powder coating Powder coating is 100% solid powder coating, which is a coating in powder form. The biggest difference between it and general solvent-based and water-based coatings is that they use different raw material components, which are absolutely combined with green and environmentally friendly water as dispersion medium or solvent. During the coating process, the part of the paint that spills out is not wasted, it can be recycled and reused, and there is no solvent volatilization, so production and construction are safe. It is easy to realize automatic paint canning, and the efficient productivity has been further improved, which is in line with the internationally popular "four E" principles of environmental protection, economy, high efficiency and excellent performance, and the varieties of such coatings have developed rapidly.  Thermoplastic and thermoset belong to the two types of powder coatings. The first is thermoplastic powder coatings, which are more expensive because they contain thermoplastic resins with high molecular weight as film-forming substances, most of which are used for functional coatings, which are chemically resistant and tough. The second is thermosetting powder coatings, and the synthesis of thermosetting resins and curing agents is the main component of film-forming substances. Because the molecular weight of thermosetting resin and curing agent is lower than that of thermoplastic resin, the fluidity of low molecular weight is relatively stable when curing, the wettability of its surface is also relatively good, the adhesion to the substrate is very strong, and the appearance of the coating film is also relatively beautiful. We usually see powder coatings such as epoxy, polyester, polyurethane, etc., which are thermosetting resins. At present, in the chemical industry, the production and application of thermosetting powder coatings are large-scale and the market share is relatively high. Water-based paints Water-based coatings with water as thinners are non-toxic and non-irritating, water-based coatings will not be easy to turn yellow, and green environmental protection coatings are harmless to human health and do not pollute the environment. In addition, water-based paints are non-flammable, unlike oil-based paints, which need to be stored separately, and it is convenient to store. At present, there are three main categories of water-based coatings on the market: First, water-soluble paints, also known as "water-based paints". The main components of this type of water-based paint include water-soluble resins and other resin-based raw materials. It is super soluble, and the resin material forms a strong coating to protect the wall immediately after being applied to the surface. The water-based paint that has come out has strong environmental performance, so it can be called the "third paint revolution" by the chemical industry. Second, water-dilution coatings. It mainly adds emulsion emulsion to the paint to dissolve the resin, and directly adds water to dilute the paint and then paint the wall during construction to achieve satisfactory results. According to the analysis of the current situation of the change process of the global coating industry, it can be seen that the mandatory use of water-based paint in Europe and the United States has entered the agenda, and China's pace towards water-based paint will also be fully developed, and the development direction of paint in the future will be water-based paint to occupy a dominant position. Third, it is the latex paint used by most families at present, also called "water-dispersible paint". The main principle is to form emulsions mainly from synthetic resins. High solids coatings Solvent-based coatings commonly referred to as VOCs in the chemical market actually refer to solvent-based coatings with high solids content. Compared with the volume of traditional solvent-based thermosetting coatings, the solid content is usually about 75%~85% higher, and it is even higher than that of thermoplastic coatings. So far, many countries in the world have not made a unified definition of high-solids coatings, which in China refers to their solids content greater than or equal to 75%. Internationally, the base color paint of automobile topcoat or flash metallic paint refers to the high solids of high-solids coatings must be about 45NVV, and for high-pigment primers, the high solids of its primer must reach more than 50NVV. How can such a requirement be met? First of all, it is required to reduce the molecular weight of the synthetic resin of the coating and the average functionality of each molecule; Second, the molecular weight distribution must be narrowed. In this case, there are some difficulties in maintaining the function of the coating film at the same time. In addition, this kind of coating also reduces a certain amount of organic solvents, to a large extent, saves the solvent in the production and use of the coating, reduces pollution, but does not reduce the construction and film-forming performance of the coating. The first generation of high-solids coatings failed to meet the requirements of high solids in terms of hardness and color retention, while the latest generation of high-solids coatings developed with low solvent content and high quality standards have been widely used in many industries to escort green environmental protection. With the increasing awareness of environmental protection and the continuous promotion of environmental protection policies, the prospects of the environmentally friendly coating market will become more and more broad. While it is growing rapidly, this field is also facing unknown challenges. Enterprises need to continuously improve their technical level and enhance their comprehensive strength in order to be invincible in the ever-changing market environment and better cope with future challenges and opportunities.

Overview   The baking temperature of powder coating has a significant effect on the color difference of the coating film. The curing temperature and curing time of the powder coating curing process are tested with a furnace temperature tracker.   It is important to carry out regular temperature tests to ensure that all products meet the required curing temperature and curing time to ensure the quality of the coating. When there is a problem with product quality, the cause of the problem in the coating and baking process can be quickly identified and solved in time.   Control temperature and baking temperature management The temperature and speed of the baking line are generally displayed on the on-site control cabinet of the baking line, and some also have the temperature of the hot air outlet of the combustion chamber. This temperature is measured by a thermocouple (or RTD) mounted on the baking line.   This control temperature is the temperature at a fixed position on the baking line. In fact, the baked product is not in the same space as this test temperature point.   Controlling thermocouples (RTDs) requires monthly accuracy testing. Replace the control thermocouple (RTD) with a new one every two years.   The baking temperature and baking time refer to the actual temperature of the workpiece and the cumulative time to maintain it not lower than this temperature, not the set temperature of the curing oven and the walking time of the workpiece in the furnace.   Quality control requires that all products meet the required curing temperature and curing time, with the maximum temperature not exceeding the maximum allowable temperature of the powder.   The temperature of the coating line must be tracked and tested regularly with a furnace temperature tracker. Generally, at least the upper, middle and lower product temperature and a little furnace gas temperature are tested.   In the case of the acceptance of the coating line, the re-use of the coating line after maintenance, the replacement of heating equipment, the replacement of temperature-controlled thermocouples (thermal resistance), etc., the furnace temperature curve must be tested before the production can be rescheduled. Daily testing is done at least once a month.  SMT furnace temperature tracker 1.Furnace temperature tracker The furnace temperature tracker can be divided into a four-channel (model SMT-4) simple furnace temperature tracker, a seven-channel (SMT-X7-4M-300-K) wireless furnace temperature tracker, etc., and the most suitable furnace temperature tracker can be selected according to the number of measurement points to be tested and the requirements of process temperature and time . 2.Test principle The furnace temperature tracker is equipped with an incubator for thermal insulation, and the temperature data is recorded in the furnace temperature tracker with the product into and through the oven.   Sensors used to test temperature are generally K-type thermocouples. There are paste thermocouples, clamp thermocouples, magnet thermocouples, etc., and the thermocouple fixing method is selected according to the process requirements.   The test temperature sensor can measure the temperature of the atmosphere in the baking oven at one point, and the surface temperature at different positions of the product at multiple points. The temperature data in the entire oven is recorded in the furnace temperature tracker.   After the furnace is released, through communication with the computer, the data of the whole process is read out, and the test results are analyzed with special software to obtain the curing time and the maximum temperature of the baking process that are higher than the two curing temperatures (selected according to customer requirements).   The wireless furnace temperature tracker adopts WIFI wireless communication and USB communication, which can embed real-time temperature data into the control system. Test Methods and Procedures 1.Set the sampling period Set the sampling period on the setting software or the furnace temperature tracker display, there are 1s, 2s, 5s, 10s, 20s, etc., usually set to 1s. 2.The thermocouple is fixed on the workpiece The hot end of the thermocouple is fixed on the surface of the workpiece to be measured, and the furnace gas temperature is measured with a furnace gas thermocouple.   Paste thermocouple: use high-temperature tape to paste the thermocouple on the surface of the workpiece, especially suitable for metal parts, plastics, special-shaped workpieces with a thickness of less than 2mm, etc. It is characterized by a short response time.   Clamp thermocouple: easy to fix, suitable for all kinds of aluminum alloy workpieces.   Magnet thermocouple: only suitable for all kinds of iron workpieces, not suitable for stainless steel, aluminum, plastic and other workpieces; The downside is the long response time. Test at least a little of the furnace atmosphere temperature. 3.Furnace test Before entering the furnace, turn on the furnace temperature tracker switch and start recording. The furnace temperature tracker is fed into the furnace together with the workpiece to record and save the temperature change of the powder coating of the workpiece throughout the curing process. Stop recording after baking and then unplug the thermocouple. 4.Download the data for analysis After the furnace temperature tracker is baked, the recorded temperature data is downloaded to the computer through the data cable, and the data is analyzed through the special analysis software. 5.Save the test temperature data At the same time, the actual set temperature of the oven and the speed of the assembly line are recorded, and the test results are analyzed. Actual test examples  1.Aluminum alloy wheel coating temperature test Automotive aluminum alloy wheels are increasingly coated with powder coatings, and at present, China's aluminum wheel industry mainly uses transparent powder for surface coating.   Painting is the final process of aluminum alloy wheel production, the main function of the process is to increase the corrosion resistance of the wheel hub in various environments during driving and the appearance of the appearance, and can be sprayed in different colors according to the needs of users.   After each layer of spraying is completed, such as wheel base coating, color paint spraying, transparent layer spraying, etc., it needs to be cured into a film, so each set of spraying equipment is connected to a set of curing oven and the corresponding cooling furnace, and the actual temperature curve of the furnace temperature can be tested and adjusted with SMT furnace temperature tracker to ensure that the temperature curve meets the process requirements.   Figure 1 shows the temperature curve of the hub coating furnace. The maximum air temperature reaches 231.7°C, which is a bit on the high side and cannot be higher than the maximum allowable temperature for powder coatings. Due to the thickness of the workpiece, if the curing time at high temperature cannot meet the requirements, the speed of the assembly line can be reduced. Fig.1. Coating temperature curve of aluminum alloy wheels 2.Appliance coating temperature test The powder curing process used for home appliance coating is 180±10 °C, and the baking time is 15±5min, which is normal curing.   However, the two are interrelated, and the initial commissioning of the equipment requires the use of an SMT furnace temperature tracker to measure the surface temperature and accumulation time of the upper, middle and lower parts of the largest workpiece, and adjust the curing oven set temperature and conveyor speed (which determines the travel time of the workpiece in the furnace) according to the measurement results until the above curing process requirements are met.   In this way, the correspondence between the two can be derived. Figure 2 shows the coating temperature curve of the refrigerator shell. This temperature profile is reasonable. Fig.2. Temperature curve of household appliance coating 3.Color-coated sheet coating temperature test Color-coated sheet refers to the product of baking organic paint applied to the surface of the substrate in a continuous production process.   As a composite material, color-coated sheet not only has high strength, easy molding, but also has good corrosion resistance, and organic coatings can be formulated in a variety of different colors.   And with the help of printing, embossing and other technologies to make imitation wood grain, leather grain and other patterns, so that the color-coated board has good decorative properties, so it has been more and more widely used in construction, home appliances and transportation.   In the production process of color-coated board, curing is the key process, after the coating is applied to the substrate, it needs to be heated to volatilize the solvent in the wet coating, and at the same time, the organic matter is polymerized or cross-linked under the action of a catalyst.   Curing not only makes the coating firmly bonded to the substrate, but also makes it have certain mechanical and physical properties, so the control of curing process parameters directly affects the product performance of the color-coated board. Figure 3 shows the temperature curve of aluminum plate color coating. Fig.3. Aluminum plate roller coating temperature curve 4.Aluminum profile coating temperature test There are two main types of aluminum profile coating lines: vertical and horizontal. It is recommended to use a 4-channel furnace temperature tracker for horizontal type and a 7-channel furnace temperature tracker for vertical type. When curing, it must be baked at the specified temperature and time.   If the temperature is too low and the time is too short, the powder will not form a pattern, and at the same time, the mechanical properties will be greatly reduced due to incomplete melting. The powder curing process is 180±10 °C, and the baking process is 15±3min, which is normal curing. Fig. 4 shows the actual test curve of a horizontal spraying line for aluminum profiles. Fig.4. Coating temperature curve of aluminum profile The maximum temperature of the upper, middle and lower aluminum surface was 251.0°C, 242.9°C and 242.9°C, respectively, and the baking time above 220°C was 13min, 12min and 12min respectively. The furnace gas temperature has a local high temperature, the temperature reaches 291.3 °C, which will not affect the quality of the product when the assembly line is operating normally, if the assembly line stops moving.   At this high temperature, the quality of the aluminium profile baking can be problematic and this local high temperature zone must be eliminated by adjusting the heat distribution of the baking line or by reducing the temperature at the outlet of the high-temperature burner.  conclusion This article introduces some application examples of temperature management of baking lines and SMT furnace temperature trackers, and it is recommended that the control thermocouples (or RTDs) of the coating line be tested regularly, and the control thermocouples (or RTDs) should be replaced every two years.   The temperature profile of the coating line is tested once a month. After the overhaul of the baking line, when the furnace is shut down and the furnace is reopened, the furnace temperature tracker should be used to check whether the furnace temperature curve is qualified before starting production.  

Gemstones, stars, metals...... These glittering things have a natural attraction to humans. Diamonds represent eternal promises, lighthouses symbolize the guidance of hope, the sun heralds a bright future, and the shining public figures in various fields are called "stars" by us, and we call them "shining points" by superiority...... Every moment of encounter with WANAN Metal Powder Coatings is sparkling. The content of metal pigments such as aluminum powder powder and pearlescent powder powder in the formulation of WANAN metal powder coating is up to 20%. The brilliance of the coating surface of WANAN metal powder coating is due to the innovative full bonding process, and the cyclone separation test shows that the WANAN bonding metal powder has less loss during the spraying process, and it is easy to obtain a uniform metallic luster on the surface. The glittering texture luster and the vast sea of color inspiration collide warmly, bringing infinite possibilities to life, lighting up every moment of ordinary life, and making us feel endless surprises and vitality in the colorful world. Beauty is not a momentary glamorousness, but a lasting beauty that can stand the test of time. WANAN Group has been deeply involved in the field of powder coating for more than 20 years, attaches great importance to R&D investment, and also attaches great importance to the safety, reliability and quality stability of WANAN powder coating products. With the full support of the group, the WANAN Group testing center was successfully established to continue to carry out rigorous product performance testing. In 2021, the WANAN Group Testing Center obtained the CNAS Laboratory Accreditation Certificate, which indicates that the WANAN Group Testing Center has a nationally and internationally recognized management level and testing capabilities, and also provides strong technical support for the quality assurance of WANAN metal powder coating products.   The test center has conducted repeated tests on the WANAN metal powder coating coating sample, and the test shows that the WANAN metal powder coating has superior impact resistance, no falling off and no cracks under 4 times magnification, the flexibility of the coating is good, and the color card bending 180° (crankshaft radius 3mm) does not fall off and no cracks. The color difference between batches is small, and the color difference of the standard color plate is ≤ 0.3, and it has excellent water resistance, acid and alkali resistance, neutral salt spray resistance, and damp heat resistance. Powder coating hides "little stars", and life will be "shiny". Wan'an metal powder coating makes ordinary days "bright" and makes every day a shining day.  

  May Day is approaching, in order to let everyone spend a pleasant holiday, the notice is as follows: Holiday time: May 1 (Wednesday) to May 3 (Friday), 2024, a total of 3 days. Order arrangement and customer service During the holiday season, we still pay attention to the processing and service guarantee of customer orders. In order not to affect the normal needs and cooperative relations of customers, we will take the following measures: 1. Arrange staff shifts in advance to ensure the smooth production and delivery of orders. 2. Set up a holiday service hotline, maintain close contact with customers, and respond to customer inquiries and requirements in a timely manner. 3. Equipped with customer specialists, responsible for customer communication and coordination during the holiday. Exclusive cooperation opportunities during the festival During the Labor Day period, we will launch special discount holiday exclusive cooperation opportunities to provide more benefits for old and new customers. Holiday Wishes: May Day is a holiday for our laborers, let us relax and enjoy the holiday. Thank you for your efforts and dedication to the company, and wish you all a happy holiday, relax and enjoy life. Please arrange the holiday in advance, prepare for holiday safety and production safety, and wish everyone a happy and safe holiday! Finally, I wish you all a happy May Day! Thank you for your understanding and support! Sincerely Salute! Fujian Wanan Industrial Group Co., Ltd

Hello everyone,happy 2024,Fujian Wanan Industry Group wish everyone enjoy the family fun,sweet life,good luck,step by step promotion,peace and health,successful career,everything goes well. We already come back from China New Year holiday,welcome to us for business.