Safety requirements and conditions for the packagi

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Safety requirements and conditions for frozen food packaging

in recent years, with the rapid development of supermarkets and chain stores and the formation of the cold chain, frozen food has become more and more popular. According to the statistics of relevant departments, at present, the annual output of frozen food in China has reached about 6.5 million tons, and is increasing at an annual rate of 25%. The per capita annual consumption has been close to 10 kg. With the continuous popularization of frozen food packaging, higher requirements are put forward for the performance of packaging materials

current situation and problems of frozen food packaging

the basic requirements of frozen food packaging are to maintain the quality characteristics of its products from production, transportation to sales, prevent bacterial pollution and facilitate consumption. For this purpose, the current conditions for packaging materials are: certain mechanical strength (high and low temperature resistance); It is barrier

at present, there are two types of packaging for frozen food: soft type and hard type. The soft type is based on plastic film, with thick and hard packaging, such as slightly thicker paper packaging boxes, composite aluminum foil stamping containers, etc. the former accounts for a large proportion. At present, the following structures are commonly used in frozen food packaging in the market: opp/lldpe products with this structure can achieve moisture-proof, cold resistance, strong low-temperature heat sealing tension, etc., and the cost is relatively low; Ny/lldpe the packaging performance of this structure can be resistant to freezing, impact and puncture, and the cost is relatively high; There is also a simple PE bag. For example, the sealing ring or combination pad should be replaced in time for vegetable packaging;. The above product structures are the structures that are used intensively in the packaging of low-temperature frozen products in the domestic market

problems prone to occur in the packaging of frozen food

can make the control more flexible (1) the impact resistance of the bag is poor, and it is easy to be damaged by external forces during transportation, loading and unloading, and shelf placement. It is very easy to break and open the bag, which not only affects the appearance of the packaged products, but also cannot play the role of the packaging itself. (2) The smoothness of the packaging bag itself is not good. In the production process, the opening is poor and the production efficiency is low. At the same time, the utilization rate of the packaging bag will be reduced and the cost will be wasted. (3) Insufficient heat sealing strength and high heat sealing temperature of the packaging bag cause damage to the heat sealing layer, which reduces the protective performance of the packaging bag, greatly shortens the shelf life of the contents, and makes the contents fail to reach the corresponding shelf life. (4) The peeling strength between the layers of the packaging bag is small, the tensile strength is not enough, and the mechanical properties of the packaging bag are poor, resulting in the layering of the packaging bag, the packaging bag can not achieve its due load-bearing effect, and can not play an effective role in protecting the contents. (5) The cold resistance of frozen food can not meet the requirements. Under the condition of low temperature, the original performance of the material can not be maintained. The packaging material is brittle, which reduces the mechanical strength of the packaging material, resulting in the rupture and cracking of the packaging bag, and can not meet the protection of the contents

several aspects that should be paid attention to in the packaging of frozen food

1 Characteristics of frozen food and its required protection conditions. Study the sensitive factors that affect the main components of frozen food, especially the nutrients such as fat, protein and vitamins, including light, oxygen, temperature, microorganism, physics, mechanics and so on. Only by mastering the biological, chemical and physical characteristics and sensitive factors of the packaged frozen food, and determining the required protection conditions, can we determine what kind of packaging materials and packaging technology should be selected for packaging operation, so as to achieve its protection function and appropriately extend its storage life

2. Packaging performance, scope of application and conditions of packaging materials. There are many kinds of packaging materials with different performances. Therefore, only by understanding the packaging performance of various packaging materials and containers can we choose packaging materials that can not only protect the flavor and quality of frozen food, but also reflect its commodity value and make the comprehensive packaging cost reasonable according to the protection requirements of packaged frozen food

3. Market positioning and circulation regional conditions of commodities. The market positioning, transportation mode and flow of commodities, and the plastic gap in China is very large every year. The regional climate and geographical conditions are the factors that must be considered in the packaging design of frozen food. The packaging and decoration requirements of commodities sold domestically and exported to different countries are different, and the protective requirements of packaging for different modes of transportation are also different

4. The influence of packaging structure and packaging materials on frozen food. Understand the migration of additives and other components in packaging materials to frozen food, and the impact of the penetration and adsorption of some components in frozen food into packaging containers on the quality of frozen food in the circulation process

5. Carry out reasonable packaging structure design and decoration design. According to the protective requirements of frozen food, the packaging cost, packaging quantity and other conditions are estimated to carry out reasonable packaging design

6. Conduct packaging inspection. Qualified commodities must have qualified packaging. In addition to testing the product itself, the packaging must also be tested. Only after passing the test can they enter the circulation field. There are many package inspection items, but not every package needs comprehensive inspection. What tests should be carried out on specific packages should depend on the characteristics and sensitive factors of the frozen food inside, the types of packaging materials and the requirements of national standards and regulations

7. Packaging standards and regulations. The packaging operation shall strictly comply with the national standards and regulations, and the export products shall also comply with the relevant standards and regulations of the importing country. Only in this way can we ensure the smooth progress of raw material supply, packaging operation, commodity circulation and international trade. With the development of market economy and international trade, the standardization of packaging is becoming more and more important. Only in this way can our goods go further

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