Analysis of the impact of the hottest packaging ma

2022-09-28
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Analysis of the impact of packaging materials on food safety

release date: Source: healthy food 123 editor: Yu Jia browse times: 10035 copyright and disclaimer

core tip: food packaging is an important part of food processing. With the continuous progress and development of science and technology today, the types of food packaging materials are increasingly rich and diverse. At the same time, food safety accidents caused by packaging materials are also emerging one after another, forcing people to pay attention to the safety of food packaging materials. This paper mainly discusses the impact of packaging materials on food safety, and puts forward some countermeasures

[China Packaging News] "food is the most important thing for the people, and food safety is the first". Food safety has always been closely related to people's lives. With the continuous improvement of people's living standards, consumers' attention to food safety has gradually increased. Food packaging is an important part of food processing. With the continuous progress and development of science and technology, the types of food packaging materials are increasingly rich and diverse. At the same time, food safety accidents caused by packaging materials are also emerging one after another, forcing people to pay attention to the safety of food packaging materials. This paper mainly discusses the impact of packaging materials on food safety, and puts forward some countermeasures

current situation of food packaging safety

food packaging is the last process for modern enterprises to process food. It uses appropriate packaging materials, containers and packaging technology to wrap food to ensure food quality and safety. Food packaging can prevent food from being damaged by biological, chemical, physical and other external factors in the circulation process from leaving the factory to consumers, so as to maintain the original ingredients and nutrition

food packaging mainly includes two aspects, one is the selection of food packaging materials, the other is the use of packaging technology, and the selection of food packaging materials is particularly important for food safety

due to the early start of the foreign food industry, the research on the safety of food packaging materials is also relatively perfect. Foreign scholars have mainly conducted in-depth research on the migration and toxicity of small molecular pollutants in paper, plastic and metal can food packaging materials. China's food industry started late, people have less understanding of the safety of food packaging, and there are many deficiencies in the relevant standards of food packaging. In recent years, a series of food safety problems caused by packaging materials have emerged in China, such as "excessive fluorescent substances" in instant noodles bowls, "excessive manganese" in kitchenware, and explosion of coke cans, making the safety of food packaging materials a hot topic of concern

sources of harmful substances in food packaging materials and their impact on food safety

at present, China allows the use of more food packaging materials, mainly paper, plastic, metal, glass and ceramics

1) the impact of paper packaging materials on food safety

paper, as the most traditional packaging materials, has low packaging price, good production flexibility, easy modeling and decoration, convenient storage and transportation, and is widely used in people's daily life. People often make paper into paper bags, cartons, paper cans, paper cups, paper tubes and other containers to package food. However, paper packaging materials also have certain potential safety hazards

some of the paper packaging materials are produced by waste paper. There will be some moldy paper in the process of collecting raw materials. After production, a large number of molds and pathogenic bacteria will be produced, which will cause food corruption and deterioration when used in food packaging. At the same time, the recycled waste paper may contain harmful substances such as lead, cadmium and polychlorinated biphenyls, which can cause dizziness, insomnia, forgetfulness and even cancer

some food factories do not use special inks for food packaging when using paper food packaging materials. If the viscosity is too high, most of these non special inks contain organic solvents such as toluene, which may cause benzene solvents in food to exceed the standard. Benzene solvents are highly toxic. If they penetrate into skin or blood vessels, they will endanger human hematopoietic function, damage human nervous system, and even lead to leukemia

usually, some additives, such as sizing agent, bleach, dye, etc., need to be added to the pulp in the papermaking process. For example, paper treated with fluorescent brighteners contains fluorescent chemical pollutants, which are highly soluble in water and easily migrate into the human body. When fluorescent bleach enters the human body, it is difficult to decompose after being absorbed by the human body, which will increase the burden on the liver. At the same time, medical experiments have confirmed that fluorescent substances can make cells mutate. If exposed to excessive amounts, they may cause cancer

2) the impact of plastic packaging materials on food safety

Plastic packaging materials are widely used in the food industry, and about 60% of food packaging uses plastic as packaging materials. Plastic is a kind of high molecular polymer, which is composed of high molecular resin and a variety of additives. It has the advantages of convenient transportation, light weight, easy processing, good food protection and so on. The impact of plastic packaging materials on food safety mainly includes resin itself, additives, etc

the resin itself is non-toxic, but its monomer, degraded products and toxic substances produced by aging have a great impact on food safety. For example, if the vinyl chloride monomer used to produce fresh-keeping film is not completely polymerized into polyvinyl chloride in the production process, the residual vinyl chloride monomer will become a pollution source. Vinyl chloride monomer has anesthetic effect, which can cause pain caused by the absorption of blood vessels in human limbs, and also cause cancer and teratogenesis

before, bisphenol a milk bottles were everywhere in shopping malls. Bisphenol A is the raw material of polycarbonate, epoxy resin and other polymer materials, and it is widespread in plastic packaging. When heated, bisphenol A can be incorporated into food, which may disturb the metabolic process of human body, affect the development and immunity of infants, and even cause cancer. Therefore, according to national regulations, the production of polycarbonate and other bottles containing bisphenol A is prohibited from June 1, 2011

additives, such as adhesives, are often used in the production of plastics. Adhesive is mainly composed of aromatic isocyanate. Plastic bags made of this material can form aromatic amines after high temperature cooking, which is a carcinogen. Plastic is often used repeatedly because it is easy to recycle. If the recycled plastic materials are directly used in food packaging, it will have a great impact on food safety

the recycling channels of plastic packaging are complex, and the residual harmful substances on the recycling containers are difficult to ensure cleaning. Some manufacturers add a large amount of paint to the recycled plastic, resulting in a large amount of paint pigment residue and food pollution. At the same time, due to lax supervision, some medical waste plastics are recycled, which will also become a considerable food safety hazard

in addition, the stabilizers, plasticizers and colorants added in the production and processing process are easy to migrate out of plastics and cause secondary pollution due to their poor quality, which is also a factor endangering food safety

3) the impact of metal packaging materials on food safety

metal materials have the advantages of high barrier, high temperature resistance, easy recycling and so on. It is also one of the traditional packaging materials. Its shortcomings are mainly poor chemical stability and acid and alkali resistance

metal packaging containers can be divided into two categories, one is non coated metal, and the other is coated metal

the safety problem of non coated metal packaging containers is mainly the dissolution of toxic and harmful heavy metals; The safety problem of coated metal packaging containers is mainly the dissolution of free phenol, free formaldehyde and toxic monomers in the coating on its surface. Iron and aluminum are two kinds of metal packaging materials mainly used in the market at present, among which tinplate, Wuxi steel plate, aluminum and aluminum foil are the most commonly used. After the zinc coating in iron products contacts with food, the zinc in it will migrate to food, causing food poisoning; The main problem of aluminum products is that aluminum materials contain elements such as lead and zinc, and excessive intake will cause chronic cumulative poisoning

4) the impact of glass packaging materials on food safety

glass as a food packaging material has been widely known. According to its chemical composition, glass can be divided into sodium calcium glass, lead glass, borosilicate glass, etc. Its advantages are non-toxic and tasteless, good chemical stability, sanitary and clean, and good weather resistance. However, the high transparency of glass is detrimental to some content foods, and it is easy to produce chemical reactions, thereby producing toxic substances. However, relatively speaking, the toxic substances in glass packaging containers are relatively single, mainly lead, arsenic and antimony. Generally, under the current situation of weak economic growth and difficulties in structural adjustment in China, their migration to food is very low, and the harm to human beings is relatively small

5) the impact of ceramic packaging materials on food safety

China is the country with the longest use of ceramic products, and its research is in the forefront of the world. The main problems of ceramic packaging materials are the glaze on the ceramic surface and the content of lead and cadmium. Long term research shows that the heavy metals lead and cadmium contained in various colored glazes will dissolve into food and cause harm to human health

solutions to the safety problems of food packaging

1) establish and improve relevant regulations on the safety of food packaging materials

at present, many regulations implemented in China's food packaging industry were formulated in the early 1990s, and these regulations basically do not involve benzene residue Migration volume and some indicators corresponding to the content of heavy metals. Therefore, relevant departments should update and improve the relevant safety regulations and standards of food packaging materials in combination with the development of food packaging in China, such as the composition standards of additives, adhesives and inks of food packaging materials, food labeling system, market access system of food packaging materials and appliances, and establish and improve the safety assurance system of food packaging materials

2) developing new packaging materials and packaging technology

traditional packaging materials have high cost and poor safety factor. Therefore, functional packaging materials have become a hot topic in western countries until the samples are damaged. The United States, Japan and the European Union have invested a lot of money and manpower in this area. Experts predict that in the future, the packaging bags produced by intelligent packaging technology will account for 20% to 40% of the total number of food packaging. It is the general trend for food packaging materials to become functional, intelligent and environmental friendly. The research and development of new packaging materials must be the focus of future development, such as modified atmosphere packaging, antibacterial packaging, nano composite packaging materials, etc. through new packaging materials and technologies to improve the safety of food packaging

3) improve the food packaging detection system

due to the different molecular structure of packaging materials, various additives and molding processes, food packaging materials show great differences, so the detection of food packaging materials is more complex. We can establish a perfect food packaging testing center to test the performance characteristics of various packaging materials according to national standards. At the same time, improve the detection technology, find fast and efficient detection methods, and improve the detection level of toxic and harmful substances such as residual monomers and heavy metals in food packaging

conclusion: food packaging materials are closely related to food safety, such as ink problems of paper packaging materials, monomer residues and additives of plastic packaging materials, heavy metal residues of metal packaging materials, etc

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