1.What are the limits for hazardous substances?Heavy metal content
The content of heavy metal elements such as lead, cadmium, chromium, and mercury is restricted. If these heavy metals are exposed or released for a long time, they will cause harm to human health and the environment.
Volatile organic compound content
Color-coated coil coatings may release VOCs during production or use. These substances not only pollute the air, but may also irritate the human respiratory tract or be carcinogenic.
Other harmful chemicals, such as polycyclic aromatic hydrocarbons and phthalates, may have potential impacts on human health through contact or volatilization, and some regions or industries will set limits on them.
2.What are the environmental protection indicators of the production process?
Wastewater and waste gas emissions: whether the wastewater and waste gas generated during the production process have been treated, and whether the emissions meet national or local environmental protection standards.
Solid waste treatment: whether solid wastes such as waste paint and waste coils generated during production are classified and treated or recycled according to regulations to avoid secondary pollution.
3.What are the recycling and environmental certifications?
Recyclability: After the service life of the color-coated coil ends, whether it is easy to disassemble, recycle and reuse to reduce the pressure of solid waste on the environment. For example, the steel substrate is recyclable, and whether the coating is an environmentally friendly material (such as lead-free and chrome-free coating) will also affect the recycling efficiency.
Environmental certification: Products that have passed third-party environmental certification are usually more environmentally friendly. Common certifications include:
China's "Environmental Labeling Product Certification" (Ten-Ring Certification);
The European Union's "CE Certification" (involving environmental protection and health requirements) and "ECOCERT Certification" (organic environmental certification);
The international "ISO 14001 Environmental Management System Certification" (for the environmental management process of production enterprises).
4.What are the environmental benefits after use and disposal?
Recyclability
After the color-coated coil is discarded, the substrate (metal) and the coating are separable and recyclable to avoid becoming a hard-to-degrade solid waste. For example, for products with easily peelable coatings, the metal substrate can be efficiently recycled and reused.
No odor and safety
During use, whether the coating releases irritating odors or harmful gases (such as volatiles at high temperatures) needs to be verified for safety through odor testing and gas release testing (such as gas chromatography-mass spectrometry).
Weather resistance and durability
Color-coated coils with strong weather resistance (such as UV resistance and corrosion resistance) can extend their service life, reduce resource waste and waste generation caused by frequent replacement, and indirectly improve environmental protection.
5.What factors should be considered in the environmental assessment of color coated coils?
The environmental protection assessment of color-coated coils needs to comprehensively consider multiple indicators such as the limit of harmful substances (heavy metals, VOCs, etc.), pollution control in the production process, recyclability and environmental certification. The environmental protection requirements of different application scenarios (such as food contact, building exterior walls, and home appliance interiors) may vary. The actual selection needs to be combined with specific industry standards and usage environment requirements.