How to ensure the safety of food packaging after t

2022-08-05
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The relevant standards lag behind, and how to ensure the safety of food packaging

recently, the safety of food packaging has frequently sounded the alarm bell, and there are many relevant reports, such as the odor in the puffed food packaging bag, the benzene content in the milk powder packaging bag exceeds the standard, the phenol content in the milk bottle seriously exceeds the standard, the plasticizer in the plastic barrel of edible oil endangers the human body, and so on. In order to ensure food safety, the relevant departments around the country have continuously strengthened the safety inspection in the process of food production, processing and sales, but to some extent, they have neglected the supervision of food packaging safety. In fact, with the increase of convenience food, the problem of packaging is becoming more and more prominent. For example, in order to increase the viscosity and transparency of products, some plastic packaging bag manufacturers have added plasticizers and stabilizers that are easy to penetrate into food and toxic in the production process, resulting in serious excessive hazardous substances in plastic packaging; In some places, a large number of waste plastics are recycled to make buckets for drinking fountains. However, no one cares about the source of waste plastics, resulting in a large number of medical waste plastics being recycled. Once these plastics are made into food packaging, they are no different from "toxic packaging". Consumers who eat the food in "toxic packaging" for a long time are not only prone to gallstones, heavy metal poisoning and other diseases, but also may lead to the spread of some infectious diseases

it can be seen that food "toxic packaging" has threatened food safety and seriously affected human health. The frequent occurrence of these problems exposes a problem: the relative lag of China's current food packaging standards, the lack of effective control over the quality of food packaging, and ultimately lead to the lack of the most effective guarantee for food safety

at present, in order to save costs, most plastic products manufacturers for food packaging use industrial grade raw materials to replace food packaging grade raw materials to manufacture food containers. Some industrial grade raw materials contain a kind of lead stearate harmful to human body, which may cause cancer and affect intelligence. Although not all industrial grade raw materials contain lead stearate, as long as industrial grade raw materials are used to manufacture food containers, there are potential dangers. In addition, unstable monomers in waste plastics or plasticizers decompose and enter food. Although there is no immediate harm, long-term use will have a serious impact on human health

it is understood that the raw materials for producing plastic products for food packaging mainly include polyethylene, polypropylene, polystyrene, etc. Some small and medium-sized enterprises use a kind of plastic called PVC as the raw material of plastic packaging for food. The cost of this raw material is very low, and plasticizers are only used in PVC plastic products. In food plastics, PVC is only used for the production of fresh-keeping film, and other food packaging plastics are rarely used. Many food manufacturers say that the plastic products they use are in line with the current relevant standards. The hygiene management measures for plastic products and raw materials for food promulgated by the Ministry of health in 1990 clearly prohibits the use of waste plastics and industrial raw materials to manufacture plastic food containers. Since then, the Ministry of health has promulgated hygiene standards, which clearly stipulate the type, scope of use and maximum amount of plasticizers. In addition, the relevant state departments also have specific standards for plastic products, including oil soluble indicators. However, the index limit of the current standard is too loose, which leads to the fact that industrial products can often reach the food grade index, so the quality inspection department can not find out whether industrial grade raw materials are added to the precautions and operation process of the steel bar bending tester for plastic food containers

the United States, Japan and other developed countries have long paid attention to the safe use of food packaging, and the relevant laws and regulations are relatively perfect. For example, the federal food, drug and Cosmetic Act (CFR) of the United States and its amendments, the EU food packaging migration series standard (EU 1186), and so on. In contrast, there is still a big gap between China and developed countries in terms of the breadth and depth of the work done in the food packaging standard system

although there are many food packaging standards in China, most of the project settings are relatively simple. There are no detailed provisions on the safety control of food packaging, especially the control of food pollution by additives used in food packaging materials. We only control more than 40 kinds of additives for plastic products, while there are thousands in the United States! In addition, China's food packaging laws and regulations are mostly formulated according to the type of food packaging raw materials, such as the hygienic standard for polyethylene molded products for food packaging, the hygienic standard for polypropylene molded products for food packaging, the hygienic standard for PVC molded products for food packaging, and so on. Although these standards have certain control over the food packaging quality of a certain material, they have no binding force on new materials and products. This leads to the passive situation that our standards always lag behind the products

to change this situation, we should learn more from the experience of some developed countries. In Europe, food packaging is not divided by material, but by use. For example, the European Union stipulates that food packaging can be divided into 10 categories according to the type of packaged food: packaged water-soluble food, acidic food, alcohol food, oily food, water-soluble acid food, acidic alcohol food, oil-water mixed food, oily acid food, alcohol water-soluble food, oily alcohol acid mixed food and so on. In terms of detecting the total migration of food packaging, similar food molds are selected according to the type of use, unlike plastic products, which are difficult to be naturally degraded by pseudo solvents. For example, 3% acetic acid is used to replace water-soluble acidic food, 10% ethanol is used to replace alcohol food, and olive oil is used to replace oily food; The test time and temperature shall be selected according to the worst conditions that can be predicted during the use of food packaging. For example, the test time such as 0.5h, 2h, 4h, 24h and 10d can be selected according to the contact time between packaging and food, and the test temperature above 5 ℃, 20 ℃, 40 ℃, 70 ℃ and 100 ℃ can be selected according to the contact temperature between packaging and food; Then, by measuring the content of food packaging residues in simulated solvents, the absorption of food packaging components was evaluated by using chromium oxide grinding paste. This approach is obviously very targeted, more practical and more scientific for the safety control of food packaging

while controlling the total migration of food packaging, developed countries also have strict control over each specific plastic monomer and additive. For example, chapter 175 to 179 of the federal food, drug and Cosmetic Act (CFR) of the United States and 90/128/eec and its amended regulations of the European Union have detailed provisions on various additives. There are so many kinds of monomers and additives, some of which we can detect, some of which are still unable to detect or can not meet their sensitivity requirements although we can detect them for technical reasons because the experimental machines of Jinan experimental machine factory are being upgraded. This has led to such a phenomenon: many of the packaging materials tested in China are qualified, and once they arrive abroad, they become substandard products and are returned. Recently, the EU has issued several yellow warnings on food packaging to China, many of which are for this reason

with the increasing trade between China and developed countries, the export of food packaging is also increasing. A very practical problem is that if we want to export, we must meet each other's requirements and meet their standards. Therefore, in order to ensure the safety and quality of food packaging more effectively, speed up the construction of China's food packaging standard system and improve the testing and analysis ability of packaging materials, both from the perspective of international integration and from the standpoint of ensuring the food safety of the common people

we also see that the state is also stepping up the formulation of relevant standards to effectively ensure the safety of food packaging. On August 1, the provisions on the administration of inspection and supervision of imported and exported food packaging containers and packaging materials formulated by the General Administration of quality supervision, inspection and Quarantine of the people's Republic of China will be formally implemented. At that time, China will implement filing management for export food packaging manufacturers and food packaging importers, and implement periodic testing. The regulations clearly stipulate that the production raw materials (including additives) and products of export food packaging must comply with the mandatory requirements of the corresponding safety and health technical regulations, and shall not use non-conforming safety and health or toxic and harmful materials to process and produce packaging in direct contact with food. Raw and auxiliary materials used for processing export packaging for the first time, including printing oil and additives, shall pass the test and be filed with the inspection and quarantine authority. Food packaging containers that have not been put on record or fail to pass the inspection shall not be used for packaging and containing export food, and imported food packaging (including the packaging of packaged food) shall not be sold and used without inspection or fail to pass the inspection

the implementation of the new regulations will further improve the quality of food packaging and ensure the safety and hygiene of food; Filing management has enhanced the traceability and operability of the source management of food packaging and packaging materials; The implementation of inspection and quarantine in accordance with the requirements of international standards puts forward higher requirements for the purchase of production raw materials, production process control and product quality inspection of relevant enterprises, which is also beneficial to the improvement of the overall level of China's imported and exported food

information source: Wangbin, Zhonghua printing & Packaging

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