How to ensure that the plastic packaging materials are healthy and safe

July 14, 2023

        With the continuous growth of the economy, people have higher and higher requirements for the quality of life, especially food safety. As a result, more and more people have stricter requirements for food plastic packaging bags. After all, the safety of food packaging related to our health. But do you know what is related to food safety? Food safety is a concept covering a wide range, including the safety of the food itself (such as raw materials and auxiliary materials, additives, etc.), the safety of the food production field (such as the hygienic conditions in the production and processing fields), the health of operators, supporting The health and safety of production equipment, etc.), the safety of the distribution field (such as the storage and transportation of food), and the safety of food packaging materials which are important factors. However, one of the most important factors is packaging safety. In fact, if the packaging materials are not safe, the food will be not safe.

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        From the perspective of the safety of packaging materials, the hygiene of packaging materials cannot meet the standard. Migration of hazardous substances in materials will affect food and even cause food unsafety. With the development of conversion technology, new packaging technology also brings challenges to food safety, so the safety of food packaging materials should also be recognized. Specifically, the hygiene and safety of plastic packaging materials have several basic requirements:

Base resin for plastics materials

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      The plastic matrix resin used in food packaging is a polymer material. If used with a pure plastic polymer material, it will not be absorbed by the body and not produce toxic effects. However, if some toxic and harmful "impurities" are found in the plastic materials, the monomer or low molecular weight will remain in the plastic, and its relative molecular weight is relatively small with the toxic feature more or less. These small molecular monomers will migrate into food when used, deposit in the body and accumulate to a certain extent, which will cause adverse effects on the human body. That is always called toxic effects. Generally, if the monomer is impure and the catalyst harmful to the human body exceeds the standard, the resin will be converted into poisonous and harmful substances, which may lead to the loss of the safety of plastic packaging materials. Therefore, with the regulations in many countries, the residual amount of monomers in each material is stipulated to eliminate the risk of plastic packaging raw materials.

Plastic additives (additives)

        Typically, the plastic packaging materials we use often contain polymer resin-based composites. In addition to polymer resins, there are many additives. If the additives are some toxic and harmful substances and their contents exceed the allowable value of the hygiene standard for plastic products, the plastic material will be a "toxic and harmful" plastic product that is not suitable for contact directly with food.

        There are plasticizers, antioxidants, stabilizers, lubricants, antistatic agents, etc. These additives may migrate into food and may affect food safety.

        Such as: plasticizer: generally also known as plasticizer. Plasticizer is a kind of polymer material additive widely used in industry. Adding such materials in plastic processing can change the flexibility and enhance the flow of plastic during processing, and make it easier to process. There are more than 100 types of plasticizer products, but the most commonly used compounds are phthalates (or phthalates, also known as substituted esters). However, these plasticizers are considered toxic and unsuitable for use in food packaging materials. Plastic packaging materials for food can replace less toxic plasticizers.

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