According to relevant department statistics, the current annual output of frozen food in China has reached around 6.5 million tons, and it is increasing at a rate of 25% per year, and the per capita annual consumption has approached 10 kilograms. With the increasing popularity of frozen food packaging, higher requirements have been placed on the performance of food packaging machines. Frozen food packaging is constantly changing, and there is a growing demand for more functionality in frozen food packaging machines.
The basic requirements for frozen food packaging are from production, transportation, and sales, maintaining the quality characteristics of its products, preventing bacterial contamination and facilitating food consumption. At present, there are two major types of frozen food packaging: soft type and hard type. The soft type is based on a plastic film. Hard-type packaging, such as slightly thicker paper boxes, composite aluminum foil stamping containers, the former accounted for a large proportion. Therefore, the food industry has high technical requirements for food packaging machines and is multifunctional. Packaging machinery equipment that has been put into the market today for frozen food packaging includes vacuum packaging machines, plastic sealing machines and heat shrinking machines.
In actual production, frozen food packaging is prone to the following problems:
1. The impact resistance of the bag is poor, and it is easily damaged by external forces in the process of transportation, loading and unloading, and shelf placement. It is prone to bag breakage and bag opening, which not only affects the appearance of the packaged product, but also does not affect the packaging itself. Some effect.
2. The smoothness of the packaging bag itself is not good, and the opening performance is poor in the production process, and the production efficiency is low. At the same time, the use rate of the packaging bag is also reduced and the cost is wasted.
3. The heat seal strength of the packaging bag is not enough, and the heat sealing layer is damaged due to the high heat sealing temperature, which results in a decrease in the protective performance of the packaging bag and a significant shortening of the shelf life of the content, so that the content does not reach the corresponding shelf life.
4. The peel strength between the layers of the packaging bag is small, the pull-off force is not enough, and the mechanical properties of the packaging bag are poor, resulting in layering of the packaging bag and the packaging bag cannot achieve the proper load-bearing function, and cannot effectively protect the contents. .
5. The cold resistance of frozen foods does not meet the requirements. In the case of low temperature, the original properties of the materials cannot be maintained. The packaging materials are relatively brittle, which reduces the mechanical strength of the packaging materials and causes the packaging bags to crack and crack. It is even more unsatisfactory. The protection of the contents.
6. The effect of the easy tearing of the packaging bag cannot be effectively exerted. The tearing strength is too large to make the packaging bag easy to open, and the tearing strength is too small to cause the mechanical properties of the packaging bag to be reduced. Therefore, it is necessary to satisfy the humanized design of the easy tearing of the packaging bag. At the same time, we must complete the protection of the product.
7. The puncture performance of packaging bags, frozen foods are generally hard after freezing, especially fish, meat products, containing bones and hard objects, transport and stacking product extrusion is easy to make bags worn out, so that the bag sealing As a result, the frozen food has high requirements for the puncture of the packaging bag.
At present, frozen food packaging has received more extensive attention as an important means to ensure the safety and health of frozen foods. In actual production, frozen food packaging should pay attention to the following aspects:
1. The characteristics of the frozen food itself and the required protection conditions.
To study the factors that affect the main components of frozen foods, especially those affecting nutrients such as fats, proteins, and vitamins, including factors such as light, oxygen, temperature, microbiology, and physical and mechanical mechanics.
Only by mastering the biological, chemical and physical characteristics and sensitive factors of frozen foods packaged, and determining the required protection conditions, can we determine what kind of packaging materials and packaging technology are used for packaging operations in order to achieve its protection function and appropriate The purpose of extending its shelf life.
2. Packaging performance and application scope and conditions of packaging materials. There are many kinds of packaging materials and their properties are different. Therefore, only by understanding the packaging performance of various packaging materials and containers, can we choose to protect the flavor and quality of frozen foods as well as the value of their products based on the protection requirements for frozen food packaging. The packaging material that makes the packaging cost reasonable.
3. Market positioning and circulation area conditions of commodities. The market orientation of commodities, the mode of transportation, and the climate and geographical conditions of the circulation area are factors that must be considered when designing frozen food packaging. The packaging and decoration requirements for goods sold domestically and for goods exported to different countries are different, and the protective requirements for different types of packaging are different. In the case of frozen food packaging, changes in the climatic conditions of the commodity circulation area are of crucial importance because the temperature has a great influence on the chemical changes of the internal components of the frozen food and on the barrier properties of the microorganisms and their packaging materials.
4. The effect of the overall packaging structure and packaging materials on frozen foods. Understand the effect of the migration of additives such as additives in packaging materials on frozen foods, and the infiltration and adsorption of certain components in frozen foods into packaging containers, and on the quality of frozen foods in circulation.
5. Make reasonable packaging structure design and decoration design. According to the protective requirements required for frozen foods, the packaging costs, packaging volume, and other aspects are expected to be properly packaged, including the design of the container shape, compressive strength, structural form, size, and sealing method, and should be designed as much as possible. Reasonable packaging structure, saving materials, saving transportation space and in line with the trend of the times, avoid excessive packaging and deceptive packaging.
6. Perform packaging testing. Qualified products must have qualified packaging. In addition to testing the product itself, product inspections must also be tested. Qualified products can only enter the circulation area. There are many packaging inspection items, but not every package needs to be fully tested. Which tests are to be carried out on a specific package depends on the characteristics and sensitive factors of the frozen foods contained therein, the type of packaging materials, and their national standards and regulatory requirements. Frozen food packaging bags can be tested as follows: test of bag strength and strength properties; heat sealing strength test of packaging bags; test of opening performance of packaging bags; test of impact performance of packaging bags; test of sealing performance of packaging bags; tearing of packaging bags Performance test; heat resistance; oil resistance test.
7. Packaging standards and regulations. Packaging operations should strictly comply with national standards and regulations, and export products should also comply with the relevant standards and regulations of the importing country. Only in this way can we ensure smooth progress in the supply of raw materials for packaging, packaging operations, commodity circulation, and international trade. With the development of market economy and international trade, the standardization and standardization of packaging are more and more important. Only in this way can our products go further.
The basic requirements for frozen food packaging are from production, transportation, and sales, maintaining the quality characteristics of its products, preventing bacterial contamination and facilitating food consumption. At present, there are two major types of frozen food packaging: soft type and hard type. The soft type is based on a plastic film. Hard-type packaging, such as slightly thicker paper boxes, composite aluminum foil stamping containers, the former accounted for a large proportion. Therefore, the food industry has high technical requirements for food packaging machines and is multifunctional. Packaging machinery equipment that has been put into the market today for frozen food packaging includes vacuum packaging machines, plastic sealing machines and heat shrinking machines.
In actual production, frozen food packaging is prone to the following problems:
1. The impact resistance of the bag is poor, and it is easily damaged by external forces in the process of transportation, loading and unloading, and shelf placement. It is prone to bag breakage and bag opening, which not only affects the appearance of the packaged product, but also does not affect the packaging itself. Some effect.
2. The smoothness of the packaging bag itself is not good, and the opening performance is poor in the production process, and the production efficiency is low. At the same time, the use rate of the packaging bag is also reduced and the cost is wasted.
3. The heat seal strength of the packaging bag is not enough, and the heat sealing layer is damaged due to the high heat sealing temperature, which results in a decrease in the protective performance of the packaging bag and a significant shortening of the shelf life of the content, so that the content does not reach the corresponding shelf life.
4. The peel strength between the layers of the packaging bag is small, the pull-off force is not enough, and the mechanical properties of the packaging bag are poor, resulting in layering of the packaging bag and the packaging bag cannot achieve the proper load-bearing function, and cannot effectively protect the contents. .
5. The cold resistance of frozen foods does not meet the requirements. In the case of low temperature, the original properties of the materials cannot be maintained. The packaging materials are relatively brittle, which reduces the mechanical strength of the packaging materials and causes the packaging bags to crack and crack. It is even more unsatisfactory. The protection of the contents.
6. The effect of the easy tearing of the packaging bag cannot be effectively exerted. The tearing strength is too large to make the packaging bag easy to open, and the tearing strength is too small to cause the mechanical properties of the packaging bag to be reduced. Therefore, it is necessary to satisfy the humanized design of the easy tearing of the packaging bag. At the same time, we must complete the protection of the product.
7. The puncture performance of packaging bags, frozen foods are generally hard after freezing, especially fish, meat products, containing bones and hard objects, transport and stacking product extrusion is easy to make bags worn out, so that the bag sealing As a result, the frozen food has high requirements for the puncture of the packaging bag.
At present, frozen food packaging has received more extensive attention as an important means to ensure the safety and health of frozen foods. In actual production, frozen food packaging should pay attention to the following aspects:
1. The characteristics of the frozen food itself and the required protection conditions.
To study the factors that affect the main components of frozen foods, especially those affecting nutrients such as fats, proteins, and vitamins, including factors such as light, oxygen, temperature, microbiology, and physical and mechanical mechanics.
Only by mastering the biological, chemical and physical characteristics and sensitive factors of frozen foods packaged, and determining the required protection conditions, can we determine what kind of packaging materials and packaging technology are used for packaging operations in order to achieve its protection function and appropriate The purpose of extending its shelf life.
2. Packaging performance and application scope and conditions of packaging materials. There are many kinds of packaging materials and their properties are different. Therefore, only by understanding the packaging performance of various packaging materials and containers, can we choose to protect the flavor and quality of frozen foods as well as the value of their products based on the protection requirements for frozen food packaging. The packaging material that makes the packaging cost reasonable.
3. Market positioning and circulation area conditions of commodities. The market orientation of commodities, the mode of transportation, and the climate and geographical conditions of the circulation area are factors that must be considered when designing frozen food packaging. The packaging and decoration requirements for goods sold domestically and for goods exported to different countries are different, and the protective requirements for different types of packaging are different. In the case of frozen food packaging, changes in the climatic conditions of the commodity circulation area are of crucial importance because the temperature has a great influence on the chemical changes of the internal components of the frozen food and on the barrier properties of the microorganisms and their packaging materials.
4. The effect of the overall packaging structure and packaging materials on frozen foods. Understand the effect of the migration of additives such as additives in packaging materials on frozen foods, and the infiltration and adsorption of certain components in frozen foods into packaging containers, and on the quality of frozen foods in circulation.
5. Make reasonable packaging structure design and decoration design. According to the protective requirements required for frozen foods, the packaging costs, packaging volume, and other aspects are expected to be properly packaged, including the design of the container shape, compressive strength, structural form, size, and sealing method, and should be designed as much as possible. Reasonable packaging structure, saving materials, saving transportation space and in line with the trend of the times, avoid excessive packaging and deceptive packaging.
6. Perform packaging testing. Qualified products must have qualified packaging. In addition to testing the product itself, product inspections must also be tested. Qualified products can only enter the circulation area. There are many packaging inspection items, but not every package needs to be fully tested. Which tests are to be carried out on a specific package depends on the characteristics and sensitive factors of the frozen foods contained therein, the type of packaging materials, and their national standards and regulatory requirements. Frozen food packaging bags can be tested as follows: test of bag strength and strength properties; heat sealing strength test of packaging bags; test of opening performance of packaging bags; test of impact performance of packaging bags; test of sealing performance of packaging bags; tearing of packaging bags Performance test; heat resistance; oil resistance test.
7. Packaging standards and regulations. Packaging operations should strictly comply with national standards and regulations, and export products should also comply with the relevant standards and regulations of the importing country. Only in this way can we ensure smooth progress in the supply of raw materials for packaging, packaging operations, commodity circulation, and international trade. With the development of market economy and international trade, the standardization and standardization of packaging are more and more important. Only in this way can our products go further.
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