China is a large manufacturing industry. In the industrial production process, the coating process involves many industries, including all industries involved in the coating process, such as automobile manufacturing and maintenance, furniture, household appliances, metal products processing, color steel plate, container , Shipbuilding, electrical equipment, pipe industry and so on.

   The coatings industry is in the field of new materials. Environmental coatings include: water-based paint, powder coatings, radiation curing coatings and high solids coatings. As environmental coatings are still in the early stages of research and development, some key technical issues are still far from being resolved. So the amount of solvent coating used in the total coating of 50-60%. China's industrial paint production in 2009 was 9,114,000 tons, of which solvent-based paint accounted for 60%. 2010 production of paint production (China Coating Industry Yearbook, 2011), 9.7 million tons, of which solvent-based paint accounted for 52.1%. Each year about 3.5 million tons (including the use of thinner paint) VOCs in the use of paint during the process of evaporation to the atmosphere (only a few hundred thousand tons of xylene alone), pollution is very serious waste. As the development in recent years is very fast, the average growth rate of 15% in 2012, the output reached 12 million tons in 2012 (import and export volume can be ignored), of which about 70% of industrial coatings, or about 8.4 million tons, Calculated VOCs emissions of about 600 million tons or more. Has become the largest source of industrial VOCs emissions in China, the impact of China's largest industrial VOCs emissions.

   Production and application process will cause environmental hazards: such as VOC emissions, formaldehyde and heavy metal residues, free TDI volatilization. China has developed a series of mandatory paint GB, which only in 2009 on the system revised to "GB24408-2009 building exterior paint in the limited material limit" as the representative of the five mandatory coating standards. At the same time, foreign more stringent environmental regulations (such as HAPs regulations, VOCs regulations, REACH regulations RoHS directive, etc.) on China's coatings products, raw materials and even downstream appliances, toys, furniture and other end products are set a higher threshold (green Barriers and technical barriers). To this end in this increasingly stringent regulatory situation, to strengthen the paint technology innovation, development and upgrading of environmental protection coatings is the general trend of development. While the use of conventional solvent coatings users need to strengthen the VOCs processing technology innovation

   1, painting process, equipment status quo

   China's coating technology and equipment developed rapidly. In the environmental protection, energy saving and resource utilization rate gap between the larger. A lot of coating line VOC emissions are not up to the unit coating area of energy consumption, water consumption and coating materials consumption are high, there is no corresponding mandatory policy. If China is a big car production, but not a strong country, car painting is no exception.

   1) Conventional automotive technology (complete process)

   (VOCs) → PVC Seat Spray (VOCs Emissions) → Medium Coating (VOCs Emissions) → Electrophoretic Smelting (Emulsions) (VOCs) → Smoothing (VOCs) → Smoothing (VOCs) → Smoothing (VOCs) → Smoothing (VOCs) (VOCs emissions) → inspection → point filling (VOCs emissions) → finishing → warranty → cavity spray wax (VOCs emissions) → assembly shop

   2) conventional auto parts process (complete process)

   Pretreatment → (electrophoresis → electrophoresis drying) or (dehydration drying) → in the coating spraying → in the leveling level → in the coating drying → topcoat spray → finish leveling * topcoat drying

   3) Conventional container process (complete process)

   Sandblasting → Spraying Zinc → Middle Coating Spraying → Middle Smoothing → Medium Coating Drying → Facial Spraying → Facial Smoothing → Topcoat Drying

   4) Conventional household appliances (complete process)

   Pretreatment → (electrophoresis → electrophoresis drying) or (dehydration drying) → in the coating spraying → in the leveling level → in the coating drying → topcoat spray → finish leveling * topcoat drying

   Pre-treatment → dehydration drying → powder coating → powder drying (no VOCs emissions)