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Food packaging materials need to be alert to the migration of colorants

recently, the State Key Laboratory of food contact materials of Jiangsu Changzhou inspection and Quarantine Bureau found that some samples had the phenomenon of colorant migration (decolorization of 120 ° diamond cone) when testing food contact materials such as colored plastic lunch boxes and plastic cups. The so-called colorant migration refers to the migration of colorants in food contact materials or products to the contacted food or food simulant, resulting in the dyeing of food or food simulant

on the one hand, the migration of pigment is due to the use of poor quality or excessive coloring in the production process of food contact materials or products. It is planned to acquire 100% equity agent of water new material at a consideration of 780 million yuan to 820 million yuan. On the other hand, it is due to the poor compatibility between the material and the colorant itself. Colorants are mainly divided into organic colorants and inorganic colorants. Some inorganic colorants contain toxic heavy metals, especially mercury, cadmium, lead, chromium, etc. Organic colorants often decompose some carcinogenic, mutagenic and other organic toxic substances. For example, some azo dyes will crack and release carcinogenic aromatic amines such as aniline and benzidine. Therefore, the regulations of various countries restrict the migration of pigments in food contact materials. GB hygienic standard for polyethylene molded products for food packaging GB "Hygienic standard for polypropylene molded products for food packaging, such as Matt Film, highlight film, heat sealing film, heat shrinkable film, high barrier film, UV radiation resistant film, antistatic film, flame retardant film, etc. in the industrial field, the demand for plastic food packaging is growing rapidly." this kind of 3D printing technology developed by Erb and his team uses a composite material (mixed with plastic and ceramics) container standard, which clearly requires decolorization test, Avoid the migration of colorants and affect food safety. EU framework regulation (EC) no.1935/2004 stipulates that food contact materials shall not cause unacceptable changes in food ingredients or deterioration of sensory properties. The Japanese "specifications and standards for food, food additives, etc." and the Korean "specifications and standards for food containers, utensils, packaging materials" require that colorants not listed in the regulatory requirements should not be used, unless the product to be tested is treated by some method to prevent the colorants from dissolving or leaching into the food

therefore, Changzhou inspection and Quarantine Bureau reminded relevant food packaging container manufacturers to pay close attention to the migration of colorants: first, the quality of raw materials should be controlled effectively, and the use of colorants and additives that are explicitly prohibited by laws and regulations or non food grade should be avoided; Second, improve the production process and formula to avoid the migration of colorants due to immature process. At the same time, if consumers find that food contact materials have discoloration in the process of daily use, they should immediately stop using them, so as to prevent colorants from entering the human body with food and causing harm to health

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