Food packaging materials need to be alert to colorant migration
Recently, the State Key Laboratory of Food Contact Materials of Changzhou Inspection and Quarantine Bureau of Jiangsu Province found that some samples had the phenomenon of colorant migration (decolorization) when testing food packaging racks such as colored plastic lunch boxes and plastic cups. The so-called colorant migration refers to the phenomenon that the colorant in the food contact material or product migrates to the contacted food or food simulant, thereby causing the dyeing of the food or food simulant. Pigment migration is due on the one hand to the use of inferior or excessive colorants in the production process of food contact materials or articles, and on the other hand, due to the poor compatibility of the materials with the colorants themselves. Colorants are mainly divided into organic colorants and inorganic colorants. Some inorganic colorants contain toxic heavy metals, especially mercury, cadmium, lead, and chromium. Organic colorants often decompose some organic toxic substances such as carcinogenic and mutagenic. For example, some azo dyes will crack to release carcinogenic aromatic amines such as aniline and benzidine. Therefore, national regulations limit the migration of pigments in food contact materials. my country's GB 9687-1988 'Hygienic Standard for Polyethylene Molded Products for Food PackagingEU Framework Regulation (EC) No. 1935/2004 stipulates that food contact materials shall not cause unacceptable changes in food composition or deterioration of organoleptic properties. Japan's 'Standards for Food, Food Additives, etc.' and South Korea's 'Specifications and Standards for Food Containers, Utensils, and Packaging Materials' both require that colorants that are not listed in the regulations shall not be used, unless the product to be tested has been processed in a certain way. Prevent colorants from dissolving or leaching into food. Therefore, Changzhou Inspection and Quarantine Bureau reminds relevant manufacturers of food packaging containers exported to Europe to pay close attention to the migration of colorants in their products: First, control the quality of raw materials, effectively control raw materials and colorants, and prevent the use of expressly prohibited or 'non-existent' products. The second is to improve the production process and formula to avoid the migration of colorants due to immaturity of the process. At the same time, if consumers find that food contact materials have discolored during daily use, they should stop using them immediately to prevent colorants from entering the human body with food, thereby causing harm to health. Food packaging machines are also the key to quality, and it is our responsibility to grasp the quality.
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