Problems and Countermeasures of the hottest frozen

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Problems and Countermeasures of frozen food packaging

according to the statistics of relevant departments, the annual output of frozen food in China has reached about 6.5 million tons, and is increasing at a rate of 25% per year, and 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 food packaging machines. Frozen food packaging is constantly changing, and gradually requires frozen food packaging machine to have more functions

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 be convenient to eat. At present, there are two kinds of packaging forms of frozen food: soft type and hard type. The soft type is based on plastic film. Draw experimental characteristic curves for hard packaging, such as slightly thicker paper packaging boxes, composite aluminum foil stamping containers, etc. the former accounts for a large proportion. Therefore, the food industry has high technical requirements for food packaging machines, which are multifunctional. Now, the packaging machinery and equipment that have been put into market application in frozen food packaging mainly include: vacuum packaging machine, plastic sealing machine, heat shrinking machine

in actual production, frozen food packaging is prone to the following problems:

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, it will also reduce the utilization rate of the packaging bag and waste the cost

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 and greatly shortens the shelf life of the contents, so that the contents cannot 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 the due load-bearing effect, and can not play an effective role in protecting the contents

5. The cold resistance of frozen food cannot meet the requirements. Under the condition of low temperature, the original performance of the material cannot 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. The more metal is also very strong, which cannot meet the protection of the contents

6. The function of the easy tear opening of the packaging bag cannot be effectively played. The tear strength is too large, which makes the packaging bag difficult to open, and the tear strength is too small, which reduces the mechanical properties of the packaging bag. Therefore, it is necessary to not only meet the humanized design of the easy tear opening of the packaging bag, but also complete the protection of the product

7. The puncture performance of the packaging bag, frozen food is generally hard after freezing, especially fish and meat products, which contain bones and hard objects. The extrusion of products during transportation and stacking is easy to puncture the packaging bag and damage the sealing of the packaging bag. Therefore, frozen food has high requirements for the puncture of the packaging bag

at present, frozen food packaging as an important means to ensure the safety and health of frozen food has been paid more attention. In actual production, frozen food packaging should pay attention to the following aspects:

1 The characteristics of frozen food and its required protection conditions

research is now a sensitive factor for the director of our factory to affect the main components of frozen food, especially the nutritional components such as fat, protein and vitamins, including light, oxygen, temperature, microorganisms, physics, mechanics and other factors

only by mastering the biological, chemical and physical characteristics and sensitive factors of packaged frozen food and determining its required protection conditions, can we determine what kind of packaging materials and packaging technology to use for packaging operations, 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, climate and geographical conditions of the circulation area are the factors that must be considered in the packaging design of frozen food. The packaging and decoration requirements of goods sold domestically and exported to different countries are different, and the protective requirements of packaging by different modes of transportation are also different. For the packaging of frozen food, the change of climatic conditions in the commodity circulation area is very important, because the temperature has a great impact on the chemical changes of the internal components of frozen food and the barrier of microorganisms and their packaging materials

4. The influence of the overall structure of packaging and packaging materials on frozen food. Understand the migration of additives and other components in packaging materials to frozen food, and the impact of some components in frozen food 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 volume and other conditions are estimated to carry out reasonable packaging design, including the design of container shape, pressure resistance strength, structural form, size, sealing method and other aspects. We should try to achieve reasonable packaging structure, save materials, save transportation space and conform to the trend of the times, and avoid excessive packaging and deceptive packaging

6. Conduct packaging inspection. Qualified goods 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. Frozen food packaging bags can be tested as follows: the strength and strength of packaging bags; Heat sealing strength test of packaging bag; Bag opening performance test; Impact performance test of packaging bag; Tightness test of packaging bag; Tear performance test of packaging bag; Heat resistance; Oil resistance test

7. Packaging standards and regulations. The packaging operation shall strictly comply with 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 operations, commodity circulation and international trade. With the development of market economy and international trade, the standardization and standardization of packaging are becoming more and more important in adjusting the investment field and investment structure. Only in this way can our goods go further

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