From living houses, driving cars, to the usual use of tableware, to toys that children come into contact with, there are traces of paint everywhere in people's lives. However, in recent years, the toxic paint incidents that have been reported frequently have made many consumers Invisible paint pollution is overwhelming, and instead chooses new environmentally friendly coatings. As the country pays more and more attention to environmental protection, the “most strict” new “Environmental Protection Law” and a series of environmental protection directives are put on the traditional coatings industry. 'Holding spell'.
The growth rate of coating production slows down and the environmental protection policy frequently applies pressure
Since the reform and opening up, China's paint production has continued to grow. Especially since the beginning of the 21st century, with the rapid economic development and improved living standards, the demand for coatings has increased significantly, and the growth rate of production has also increased significantly. However, in recent years, due to various fields of demand The growth rate of demand for coatings in the market is limited, and the growth rate of coatings production has dropped significantly. The factors affecting the growth rate mainly include: real estate is under pressure from policies, and demand for building coatings is limited; automobile production and sales growth slows down significantly; shipbuilding The industry continues to be sluggish; wooden furniture production declines and so on.
What makes many coating companies 'heartbreaking' is the above-mentioned environmental protection policy, especially the relevant policies of China's coating industry since 2017, most of which involve environmental protection. "The 13th Five-Year Plan for the Prevention and Control of Volatile Organic Pollutants According to the report, in 2020, the national industrial coating VOCs emissions will be reduced by more than 20%, and the key areas will be reduced by more than 30%. The "Environmental Protection Comprehensive List (2017 Edition) (Draft for Comment)" lists high pollution, high List of risk products, including wood furniture spray paint, toy paint, automotive paint, marine paint, steel structure paint and other manufacturing paints, and a number of high VOCs paints are listed as 'double high'. 4. The levy, the coatings industry is even more stressful, and the environmental transformation is imminent.
Environmentally friendly coatings are popular for testing instruments
As one of the major emitters of air pollutants, the coatings industry, which has suffered from rising raw materials, seems to be overwhelmed in the face of a series of environmental protection policies. However, the impact and pressure of over-emphasizing environmental protection policies is too much. If you are uneasy about this, it is better to improve the production process as soon as possible, develop environmentally friendly products, and establish the development direction of environmental protection.
In general, paints are composed of film-forming substances, pigments, auxiliaries, and solvents. Inferior paints contain a wide variety of toxic substances, and may contain formaldehyde in addition to the most volatile VOCs. , benzene, heavy metals, preservatives and other chemical hazards. In order to better cope with increasingly strict environmental protection policies and meet the environmental protection needs of consumers, non-toxic and harmless environmentally friendly coatings are the trend. The existing environmentally friendly coating products are mainly Divided into low VOC or zero VOC coating, activated carbon wall and other healthy functional environmentally friendly coatings, wood-based environmentally friendly coatings, zero-pollution coatings (strictly control formaldehyde content, do not use lead, chromium, cadmium and related materials as pigments or desiccants) and Environmentally friendly paint with energy saving effect.
Of course, no matter what kind of environmentally friendly coatings, we must strictly control the content of VOC, formaldehyde, heavy metals and other harmful substances, and do not use toxic solvents. The national standard GB/T 35602-2017 "Green products" just implemented on July 1, 2018 Evaluation Coatings not only specifies the green product evaluation standards for waterborne coatings, powder coatings, radiation-curing coatings, high-solids coatings, solvent-free coatings, etc., but also proposes corresponding evaluation methods. For example, for the determination of VOC content, Generally, the difference method is used, gas chromatography. Gas chromatography can be said to be one of the widely used instruments in coating detection. It can separate various volatile organic compounds in coating samples and accurately measure their content. The most important form of formaldehyde can be determined by a variety of quantitative methods, including titration analysis, spectrophotometry, gas chromatography, high performance liquid chromatography, electrochemical analysis, etc. The heavy metals contained in the coating can be Determination of trace metals by spectrophotometry, atomic spectroscopy, and electrochemical methods. Because the metal elements contained in the coating contain Is low, the first two methods commonly used. Further, GC-MS, HPLC techniques and the like may be used for the determination of other harmful substances.
Undoubtedly, with the increase of environmental protection policies, consumers pay more attention to environmental protection and health. In the future, the development technology of the coating industry will develop towards environmental protection. Although many small-name coating companies in inferior position may be eliminated, but for the entire coating. In the industry, this shuffling is inevitable and benign. 2018 will be a hard fight, and it is hoped that major paint companies will be able to successfully transform and contribute to environmental protection and consumer health.
