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Solid waste produced in the production process of powder coatings belongs to China's prohibited imports of solid waste, imported powder coating materials are solid waste only by virtue of the common sense of port supervisors and the naked eye observation can not be determined, need to be determined by special solid waste identification, but so far there is no solid waste identification standards, norms or methods of powder coating materials, therefore, it is very necessary to establish a solid waste identification method of imported powder coating materials.
1. Determining the natural properties of the material, including the use of Fourier Transform infrared spectroscopy to analyze the main components: the approximate mass fraction of organics and inorganics using cryogenic furnaces and Maffer furnaces, and the X-ray fluorescence spectroscopy to analyze the main components of burned residues and their mass fractions.
2. Determine the source of the material, determine whether the material belongs to the powder coating product, refers specifically to the physical form and impurities observed through the naked eye, measure the particle size distribution of the powder part, analyze the state of the container in the powder part, particle size distribution, coating appearance and impact resistance, such as HGT2006-2006 "thermo-solid powder coating" requirements of the indicator
China
.
3. To determine the solid waste properties of the materials, the use of this method to the customs suspected of solid waste in the name of powder coating products declared imports of two materials solid waste identification, identification results show that both materials are produced in the powder coating products production process, respectively, non-conforming powder or expired powder and ultra-fine powder, are prohibited from imported solid waste in China, showing that the established solid waste identification method is feasible, can provide solid waste identification and supervision of materials produced in the production process of imported powder coatings.
