With the improvement of people's environmental awareness, environmentally friendly coatings are increasingly favored by people. What kind of environmentally friendly coatings are better? First, let's understand how environmentally friendly coatings are defined. The first is the total organic volatile (VOC) content of the coating: organic volatiles pose a direct hazard to our humans, the environment and society. The VOC content of truly environmentally friendly coatings is very low, close to zero or even equal to zero. The second is the toxicity of solvents: those that cause disease after contact with or inhalation. Toxic solvents pose a direct hazard to production and paint unions. Environmentally friendly coatings, on the one hand, the solvent is environmentally friendly, the harmful substances are controlled in a harmless range; the second is the use of water-based paint. The third level is heavy metals, free formaldehyde and other harmful substances, such as environmentally friendly coatings, free formaldehyde, lead, chromium, mercury and other heavy metal ions are not, this is a higher level of environmentally friendly coatings. The fourth level is the user's safety problem: in general, after the paint is completely dry, its solvent is basically volatilized, but this requires a process, especially a room-temperature-cured coating, and some solvents evaporate very slowly. Although the amount of solvent is not large, due to the user's long-term contact, if the solvent is toxic, it will also cause harm to human health. Therefore, it is necessary to limit the use of toxic solvents during preparation. The basic requirements of national standards for environmentally friendly coatings are: TVOC value should not be higher than 100g/L, benzene and benzene series value should not be higher than 500mg/kg, free formaldehyde value should not be higher than 100mg/kg, mercury value should not be higher than 60mg/ Kg, the lead value shall not be higher than 90mg/kg, the cadmium value shall not be higher than 75mg/kg, and the chromium value shall not be higher than 60mg/kg. TVOC, benzene and benzene series, free formaldehyde, heavy metal mercury, lead, cadmium, chromium and other interior wall coatings that meet national standards are considered environmentally friendly coatings. However, the interior wall coatings that meet European and American standards are more environmentally friendly. In addition, environmentally friendly coatings also involve many indicators, such as: no or less irritating odor, scrub resistance more than 5000 times, waterproof and moisture-proof. How to choose environmentally friendly paint? 1, the choice of paint should focus on quality, not just pay attention to the price. 2. It is necessary to purchase products with product quality certificate and environmental protection mark, and require the production or sales unit to issue a quality inspection report for the product. 3, buy regular manufacturers to produce, quality assurance brand paint. 4. Pay attention to the production date when purchasing, and confirm the warranty period. [Follow the WeChat public number "Jiuzheng Paint Network"; pay attention to surprises, scan code to view "If your husband is selling paint..." Jiuzheng Coating Network Exchange Group] Welded Wire Mesh,Metal Wire Mesh,Welded Wire Fencing,Industrial Metal Welded Wire Shenzhou City Hongda Hardware Products Co.,Ltd , https://www.galvanziedwire.com
Definition and selection of environmentally friendly coatings
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