Powder coatings go through the days with coating

Foreword
powder coating is a coating with a solid content of 100%, which is applied in powder form to form a coating film. Unlike general solvent-based coatings and water-based coatings, it uses instead of solvents or water as a dispersion medium, but with air as a dispersion medium.
Foundation
With the rapid development of the petrochemical industry in the 1940s, the production of thermoplastic resins such as polyethylene, PVC and polyamide grew rapidly, and people began to study the application of resin melting to metal surfaces, so process methods such as roller coating, spray drying and flame spraying have emerged
China
).
In 1952 Dr. Gemmer of the Federal Republic of Germany invented the fluidized bed coating method, where the powder can flow and float in a special container with aerodynamics, with liquid properties, thus continuously and automatically applying a dense and smooth coating to the surface of the preheated work surface. At that time, the resins used were mainly thermoplastic resins. With the advent of thermo-solid epoxy resin, fluidized bed coating process began to enter the rapid development of substantial, in the field of electrical insulation and chemical anti-corrosion has obtained industrial applications.
while fluidized bed coatings are used throughout Europe and the United States, other powder coating processes are being developed to meet a wider range of commercial needs. Traditional liquid paints contain solvents that pollute the environment, and paint contains a particularly high amount of solvents.
people began to study non-polluting environmentally friendly industrial paint. People study the original route of environmentally friendly coatings are: First, to reduce the solvent content of 50 to 60% of the paint to 20 to 30%; The coatings obtained by the first two methods still contain solvents that pollute the environment, while the third method guides the development of powder coatings that do not contain any organic solvents.
Breakthrough
In 1953, Div EG issued a patent for applying plastic with fluidized bed resin, and in 1957 officially disclosed its principle, known as
plastic powder coating
(later commonly known as plastic powder)
. The invention of fluidized bed coating methods and equipment has entered the commercial coating industry for thermoplastic resin powders such as polyethylene.
the early 1960s, Shell and Van Cauwenberghe developed epoxy resins and thermosoated epoxy powder coatings for thermostyl-solid powder coatings.
1962, the French company Sames invented the
electrostitive powder spraying device
, powder coatings into the decorative use of coatings. Its excellent coating performance and simple construction methods for paint manufacturers and construction applications to pay attention to.
"Teodur DM" is the world's first sprayable decorative thermosolysting powder coating, using Z-type scraper mixer hot melt mixture made, Teodur DM epoxy / double cyanide powder coating was first used for hospital furniture coating, its curing conditions of 350 degrees F/30min.
Shell pioneered the
melt extrusion method widely used in today's powder coatings industry
1964. So that the production of powder coatings to achieve continuity, embarked on the road of industrial production.
1966, Los Angeles issued the
66 Regulations
", other regions and countries have strictly restricted paint solvent pollution of the environment. This promotes the rapid development of powder coatings. Powder coatings are regarded as one of the development directions to solve pollution.
the early 1970s, the world appeared research and development of powder coatings and their promotion and application of "powder coating heat."
the earliest research powder coating technology in China was the
of Guangzhou Electrical Science
. In 1965, the Institute first developed a successful epoxy insulation powder and fluidized bed coating motor core process and equipment, and in Changzhou insulation plant to establish an annual output of
10t
epoxy insulation powder production line.
auto parts factory in Shanghai, etc. in the fluidized bed production line with epoxy insulation powder coating envesulation motor. Shanghai Radio 24 factory with ball grinding production and manufacture of decorative polyethylene powder coating, the use of electrostectrectrecturic spray communication equipment shell. The Coatings Research Institute of the Ministry of Chemical Industry has developed decorative epoxy powder coatings and closed isocyanate cross-linked polyester tree powder coatings, and attempted electrostectric spray toys, optical instruments and automotive wheels.
the 1970s and 1980s was the peak period of powder coating technology research and development in China. All the enterprises and institutions affiliated with various ministries have made fruitful scientific and technological achievements, in order to meet the climax of China's first powder coating technology application. The Coating Industry Research Institute of the Ministry of Chemical Industry has developed powder coating leveling agents and decorative epoxy powder coatings, and the 738 factory of the Ministry of Electronic Industry and the 345 factory of the Ministry of Aviation Industry have taken the lead in establishing a powder electrostitectronic spraying line in China to carry out the scale production of powder electrostectronic coating on the housings of electronic products and washing machines. Guiyang Electric Factory of the Ministry of Aviation Industry and international synchronization developed a successful static current bed for the motor iron core of static powder insulation coating and put into mass production. Reform and opening-up has accelerated the development of China's powder coating industry, powder coating production has risen in a straight line, quickly occupied
washing machines, refrigerators, air conditioners, microwave ovens, electric fans and other markets.
2000, the European Union has issued the Rosh Directive, REACH regulations, many countries issued VOCs emission reduction plans, domestic environmental pressure is becoming more and more serious, powder coatings have been rapid development.
Devestment
domestic powder coating market development, initially to household appliances products as the main object, this century gradually popularized the application of mechanical engineering, instrumentation, medical equipment, electronic components, construction industry, automotive parts, post and telecommunications, aerospace, ships, light industry, bicycles, motorcycles, metal furniture, office supplies, road construction and other fields. At present, powder coating in petroleum, natural gas and ship pipeline inside and outside the wall of the coating has also been widely used, metal products coating technology has become mature, and developed the corresponding coating standards.
the austrian tiger coating (Tiger) took the lead in the introduction of Henhill Bonding machine in China, completed the domestic metal powder coating Bonding process upgrade. AKZO has released the D-Series, taking powder coatings into the field of ultra-weather resistant. Wood transfer gradually shifted from the original anti-theft door to the aluminum profile market. MDF and plastic non-metallic fields have also made great progress in the application technology of low temperature cured powder coatings and UV radiation curing powder coatings.
nearly two years, cars, cars, mud mixers and other powder coating also mentioned the schedule and got a breakthrough.
Innovating
With the development of application areas, the development of powder coating varieties are: heavy anti-corrosion powder coating, low temperature curing coating coating, fast-fixing energy-saving powder coating, UV photo-cured powder coating, polyurethane powder coating, acrylic powder coating, high temperature powder coating, thin powder coating,
fluorocarbon
ultra-weather-resistant powder coating, thermal transfer powder coating, high hardness powder coating.
more application development needs the industry upstream and downstream, resin synthesis, manufacturing equipment, coating process breakthrough.