The pollution of the environment caused by the annual discharge of wastewater, sludge, exhaust gas, and waste residue in the paint industry cannot be underestimated. Especially in the production and use of coatings, the large amount of VOC (organic volatile compounds) emitted has attracted high attention from relevant national departments and the general public, and the advantages of environmentally friendly powder coatings are gradually emerging.

Recently, Liu Zexi, Secretary General of the Coatings and Coating Professional Committee of the Chinese Chemical Society, stated that in recent years, the environmental advantages and energy-saving and emission reduction advantages of powder coatings have become increasingly prominent, and the industry is facing rare development opportunities. Liu Zexi said that both the "Eleventh Five Year Plan" for the development of the paint industry and the "Medium - and Long Term Development Plan for the Technology of the Paint Industry" clearly state the need to vigorously develop environmentally friendly powder coatings. The "Eleventh Five Year Plan" for the development of the coatings industry proposes that by 2010, the production of environmentally friendly coatings such as water-based coatings, UV cured coatings, powder coatings, solvent-free coatings, and high solid powder coatings should account for 80% of the total coating production, and the VOC content in various coatings should be reduced by 50%. Prohibit the use of toxic and harmful substances specified in relevant international conventions (such as tributyltin, DDT, etc.), and scientifically limit harmful substances (such as heavy metals, benzene derivatives, formaldehyde, etc.) in coatings. At the same time, we will comprehensively promote clean production, safe production, and civilized production of coatings.

It is reported that the "Medium - and Long Term Development Plan for Coating Industry Technology" proposes that in the next 10 years, China will significantly reduce the proportion of traditional solvent coatings in industrial coatings, reducing their share from the current 50% to 5%. Implement new technology grafting and transformation of the traditional coating industry over a period of 10-15 years, ultimately reducing the market share of traditional solvent coatings to less than 1%.

&Ldquo; The environmental protection, energy saving, and economic performance of powder coatings will continue to be recognized and accepted by people, and eventually become the preferred coating variety in industrial, civil, and construction fields& rdquo; Liu Zexi said. It is reported that the production process of powder coating is basically non-existent; Three wastes” Emissions.

After nearly 30 years of development, the production technology of powder coatings in China has become very mature. The product yield of powder coating exceeds 95%, and the ultrafine waste powder with a content of less than 5% generated during the production process can be recycled through the recycling system and reused in production, achieving almost zero emissions. At the same time, the storage, transportation, and sales of powder coatings are free from the inherent fire and environmental hazards of solvent based coatings, ensuring safe transportation, storage, and use. More importantly, the coating (i.e. use) process of powder coating does not emit pollutants. The one-time powder coating rate of powder coating can reach over 70%. The overspray powder is recovered by the recycling system and returned to the powder supply bucket. It is mixed with new powder in a certain proportion and reused, with a comprehensive utilization rate of over 95%. Even the remaining 5% of waste powder can be recycled by coating companies and handed over to manufacturers for reprocessing before reuse, truly achieving the goal of“ Three wastes” Zero emissions.

Compared with liquid paint, the advantages of powder coating are more obvious. At present, the painting rate of liquid paint is only 30-50%. This means that 50% to 70% of the paint cannot be applied to the workpiece during the coating process, and becomes waste paint slurry or VOC discharged into the environment. Due to the difficulty in treating these waste slurries, VOCs are not only harmful to human health, but have also been proven to be one of the main greenhouse gases causing global climate change. Therefore, developed countries have been restricting the development of organic solvent based coatings, including paints, since around 2000, and have set strict limit standards for VOC emissions from furniture and interior decoration materials.