Food packaging materials refer to the products used for packaging or storing food or food additives and coatings that come in direct contact with food or food additives. It can be seen that the quality of food packaging materials directly affects food safety. Now from the main use of several packaging materials on the impact of food safety.
Plastic is the most widely used food packaging material. The unsafe hidden danger lies in the resin monomer, formaldehyde, toluene, and other compounds migration. In addition, additives added in the production process, such as stabilizer, colorant, plasticizer, etc., migrate some compounds into food, affecting food safety.
Paper is the oldest and most traditional packaging material. In the process of paper making, chemicals such as impermeable, bleach and dye are added to the pulp, and some chemicals will migrate into the food. From the paper products can also be dissolved in mildew agent or processing used formaldehyde.
Aluminum foil, iron foil, and tin cans are used for metal packaging. When using aluminum foil, rarely used alone, and plastic film adhesive together. Most of the surface of the can is covered with plastic. Therefore, heavy metals and some compounds in additives migrate into food, affecting food safety.
Glass is also a kind of inorganic melt, mainly composed of SiO2-Na2O. Because of the different types of glass, there are leaches from the raw materials.
Besides, the coloring of food packaging materials requires the use of metal salts. If heavy metals migrate into the food, it will also affect food safety and pose unsafe risks