Study on VOC release characteristics and environmental protection detection method of art coatings

The dryer method (such as GB/T 18582 related method system) places the specified area of samples in a sealed dryer, collects the releases at a certain temperature, and determines the content of VOCs and formaldehyde. It is easy to operate, has a short cycle, and is suitable to product delivery inspection. The climate box method simulates the indoor ecological stability in a test box with controllable temperature and humidity and atmosphere exchange rate, and collects the discharge material to calculate the area discharge rate, which is closer to the actual consumption scenario, however the equipment standards are high and the cycle is long. The data of the two methods cannot be immediately compared, and the limit standard corresponding to the detection method should be paid attention to during evaluation.

China implements CCC compulsory certification to aqueous interior wall coatings (Announcement No. 9 of the General Administration of Market Supervision, 2024, from July 1, 2025), and ecological preservation limits are implemented in accordance with national standards. France A, Germany E.L.F and other certifications set stringent classification limits to VOCs discharge, using climate box method to assess, A is the highest level. When purchasing, you can compare the measured values and limits in the inspection report, and pay attention to the verifiable environment of the report number. On the whole, the ecological preservation assessment of art coatings should be based on the detection method, the limit standard and the authenticity of the report, rather than a single publicity index.

In terms of extension, ecological preservation performance is also related to the construction process: inadequate sealing of the base layer and lack of primer might affect the integrity of the film, thus affecting the discharge characteristics; Full ventilation and maintenance after construction will help VOCs decay as soon as possible during the initial high discharge period. In engineering practice, practitioners should combine product testing data with construction specifications to form a complete environmental manage chain from material selection to delivery.

attention should also be paid to the timeliness and scenarios in the consumption of test data: the certification certificate has a validity period, and the purchase should be checked whether the certificate is within the validity period; to different batches of the same product, there might be reasonable fluctuations in test data, and the reference value is the highest when the report number corresponds to a specific batch. Environmental judgment is greater rigorous when data aging, batch correspondence and testing methods are included in the assessment.