This article focuses on the problem of the limit of harmful heavy metals in packaging inks, analyzes the analysis technology of the detection results of harmful heavy metals in packaging products, points out the main reasons for unqualified packaging products, proposes to develop environmentally friendly packaging inks as soon as possible, and strengthens the packaging of harmful heavy metals. Recommendations for testing azo dyes, formaldehyde, ozone depleting substances and other environmental protection projects. I. Introduction Since the European Union 94/62 / EC "Packaging and Packaging Waste Decree" (referred to as the Packaging Decree) was promulgated and implemented at the end of 1994, it has attracted the attention of the world ’s packaging industry, including China ’s packaging industry, and will have an impact on the development of the packaging industry. profound influence. The domestic industry concerned called the decree the “green barrier†set by the European Union. Many scholars commented on the decree. These comments focused on the reduction, recycling and recycling of packaging waste. Regarding the impact of the limit of harmful heavy metals (lead Pb, cadmium Cd, mercury Hg, chromium Cr6 +) in packaging and packaging inks on China's packaging products, especially export packaging, there are very few detection and analysis. The reason is that the environmental impact of harmful heavy metals in packaging products and inks has not been paid enough attention, and there is no relevant data to evaluate the level of harmful heavy metals in domestic packaging products. At present, foreign importers are requesting more and more hazardous heavy metal testing data for packaging products, which makes exporting companies feel tricky and causes unnecessary losses. Combined with the analysis of the detection results of harmful heavy metals in packaging products and inks, the packaging production enterprises, testing institutions and relevant departments have an understanding of the current status of the detection of harmful heavy metals in our ink products. The company's various detection technologies are based on international standards. The detection of heavy metals in ink products is generally performed by atomic absorption spectrometry. Second, the packaging regulations on the harmful heavy metals in ink The EU Packaging Directive came into effect on June 30, 1996. Regarding the limits of harmful heavy metals (Pb, Cd, Hg, Cr6 +) in packaging and inks, the Packaging Decree provides: Two years after the implementation of the packaging decree, the total amount of Pb, Cd, Hg, Cr6 + does not exceed 600mg / kg, three years after the implementation of the packaging decree, the total amount of Pb, Cd, Hg, Cr6 + does not exceed 250mg / kg, five years after the implementation of the packaging decree , The total amount of Pb, Cd, Hg, Cr6 + does not exceed 100mg / kg. The 94/62 / EC Packaging Directive is further developed on the basis of the relevant packaging regulations of the European Community Packaging and Environmental Regulations. Its main purpose is to promote the recycling and utilization of packaging, control the quantity of packaging, and improve the quality of packaging. In addition to limiting the content of the above four harmful heavy metals, it is also required to limit the amount of packaging auxiliary materials such as inks, dyes, coatings, adhesives, stabilizers, and laminations to reduce or completely make the packaging materials free of heavy metals. Encourage the use of water-based materials and transfer from solvents to water-based materials, such as the use of water-based inks, to limit halogens and other dangerous substances, and to restrict the use of chlorine-bleached packaging materials for food packaging. 3. Harm of heavy metal inks to the environment and human body Among metal elements, heavy metals and their compounds are more toxic, while Pb, Cd, Hg, and Cr are harmful heavy metals that are often encountered in production and living environments. Harmful heavy metal pollution is extremely harmful to the environment and human beings. The human body cannot excrete harmful heavy metals accumulated in the food chain or other ways through its own metabolism. The basic chemical processes of harmful heavy metals in the food chain of the environment and the accumulation and accumulation of organisms, from low-level microorganisms to small aquatic animals, and finally transferred and enriched to the top of the biological chain-carnivores, causing harmful heavy metals in the human body Enrichment. During the recycling or natural degradation process of packaging products and their wastes, harmful heavy metals and certain other chemical substances infiltrate into the environment, which will accumulate and accumulate in the nature, especially water and soil, which will affect the ecosystem and cause disturbances, which will become Human health barriers will ultimately directly threaten human safety and survival. At the same time, when the harmful heavy metals in the packaging products exceed a certain limit, it may have an adverse effect on the recycling of the packaging products, may complicate the recycling process, and even hinder the recycling of the recycled packaging products. These are packaging laws that restrict harmful heavy metals Pb, The main reason for Cd, Hg, Cr. 4. Atomic absorption spectroscopy Atomic absorption spectroscopy is a new type of instrumental analysis method created in the 1950s. It complements atomic emission spectroscopy, which is mainly used for qualitative analysis of inorganic elements, and has become the main method for quantitative analysis of inorganic compounds. Atomic absorption spectroscopy is based on the resonance absorption of the characteristic radiant light of the measured element emitted by the light source based on the ground state atoms of the measured element in the vapor phase of the sample to be measured. The content of the tested element. Its main function is to determine the content of metal and non-metal elements in various inorganic and organic samples. Due to its high sensitivity, fast analysis speed, simple instrument composition, and convenient operation, this method has been widely used, and is particularly suitable for trace analysis and trace analysis. 3 Side Seal Bag Making Machine Bagging Machine,Bag Machine,Side Seal Bag Making Machine,3 Side Seal Bag Making Machine Wuxi Zhengyu Technology Development Co.,Ltd. , https://www.zhengyumachine.com
Discussion on the Limitation of Harmful Heavy Metals in Packaging Inks