As the demand for military foods in modern warfare continues to increase, its packaging technology is also becoming more advanced. According to development trends, military food packaging will develop towards light weight, reliability, increased functionality, and biodegradability.
Combining military foods is usually a combination of products. Such as canned food, compressed dry food, etc. When these products are combined into foods or daily foods according to certain nutritional ingredients, the packaging used is a combination package. According to different use occasions, different materials are used for combination packaging. At present, the materials used for combination packaging include cartons, composite bags, plastic boxes, and tinplates. The most important principle of these materials is to reduce weight and cost while providing protective performance.
Aluminium-plastic packaging is used by foreign troops in some field foods, such as packaging of sauces, butter, and some spices. Aluminum-plastic cans are gas-containing cans. Due to the vast geographical area in China, gas-containing cans produce physical “fat sound†at high altitudes. To use aluminum cans in our military, we must solve this problem only if there are prospects.
Hard canned hard cans are used primarily by the army as a collective food in the field, or in general foods. The future direction of hard cans is: The easy-open lid hard cans are difficult to open. In recent years, a number of easy-open-canned cans have been introduced into the ranks of military foods, such as 962-diameter cans of 90 millimeters and the eight-treasure porridge cans of relatively small diameters, but they cannot meet the requirements of military cans because military cans use the largest diameter of 100 millimeters. 1068 cans. Due to technical reasons, such large-caliber, easy-open domestic products still fail. In addition, there are still technical problems such as easy breakage of the pull ring and uneven depth of the reticle. Therefore, the development of easy lids is one of the main directions for the development of military cans in the future.
Shaped cans The foreign army actually uses a rectangular flat box. The material it uses is chrome-plated tinplate. It is actually a two-piece can and consists of a bottom and a lid. The can can be used as a cookware, heated or insulated on a fire or on a steam cooker; it can also be used as a tableware to replace the dish and improve the convenience of military foods. At present, China does not have the ability to produce such large rectangular cans. Its technical difficulty is mainly due to the high rejection rate at the time of sealing, resulting in high production costs.
Soft packaging cans are mainly used by military forces in individual foods in field foods. The canned packaging will develop in the following direction: aluminum foil in aluminum foil bags has good barrier properties, including gas and light, but poor resistance to wrinkles. Anti-wrinkle performance can be improved by compounding with other materials.
Natural degradation In view of the demand for environmental protection, develop flexible packaging materials that can degrade naturally.
In the production of heat sealed soft cans, if the bag mouth is contaminated, such as oil stains, seals, or can not be tight or the strength is reduced, this problem has a great impact on the production speed, and also affects the product quality. At present, relevant experts are discussing the use of a new heat sealing layer, which still has good sealing strength under the conditions of oil contamination. This breakthrough in technology will have a major impact on flexible packaging technology.
Composite packaging development of new semi-hard canned materials will be one of the directions for future development of military cans.
Multi-layer co-extruded packaging This material uses EVOH as a barrier material and can withstand high temperatures of 121°C. Because plastics have a good formability, it is easy to form grids, and the top is made of heat-sealing plastic composite materials. In this way, there are several types of meals in one box. This is difficult for metal cans. Domestic companies have trial-produced such packaging materials.
Dry product packaging Dry products are resistant to storage at room temperature, so many military foods use this form. Our military dry products use a wide range of materials, such as tinplate, aluminum foil and composite packaging materials. Most military dry products contain fats and oils, some of which are still relatively high, such as compressed dry foods.
The most critical factor affecting the shelf life of these foods is fat oxidation. Therefore, such products must be packed with good oxygen barrier properties. According to the current situation of packaging development, products like tinplate tins, aluminum foil bags and multi-layer composite bags will be used in large quantities in military foods.
Edible packaging Some foreign troops are studying edible packaging. This kind of packaging is often used for internal packaging. On the one hand, it can reduce the volume and quality of packaging, and increase the edible portion of the whole set of food; on the other hand, it can increase the convenience of use, reduce food contamination, dregs, etc. At present, our military has less research on edible packaging, but this will be a very promising research content.
Insulation packaging In order to enhance the sensory acceptance of military foods, the military has developed a non-flaming heater that automatically heats. This heater can heat the canned food center temperature to about 60°C. In order to effectively increase the heating efficiency, prevent the loss of heat, and prevent the temperature from being burned to the skin, insulation materials are needed. This packaging material requires a small volume and good heat insulation.
Due to the rapidity and flexibility of combat operations, protective packaging requires military foods to stand up to airdrops and umbrellas, float on water, and prevent damage and pollution caused by the explosion of nuclear weapons. At present, there are foam plastics, glass wool, etc. used as protective packaging. These two kinds of materials can both float on the water surface and also can better cushion the impact force generated by airdrop. Research in this area needs to be further strengthened.
Combining military foods is usually a combination of products. Such as canned food, compressed dry food, etc. When these products are combined into foods or daily foods according to certain nutritional ingredients, the packaging used is a combination package. According to different use occasions, different materials are used for combination packaging. At present, the materials used for combination packaging include cartons, composite bags, plastic boxes, and tinplates. The most important principle of these materials is to reduce weight and cost while providing protective performance.
Aluminium-plastic packaging is used by foreign troops in some field foods, such as packaging of sauces, butter, and some spices. Aluminum-plastic cans are gas-containing cans. Due to the vast geographical area in China, gas-containing cans produce physical “fat sound†at high altitudes. To use aluminum cans in our military, we must solve this problem only if there are prospects.
Hard canned hard cans are used primarily by the army as a collective food in the field, or in general foods. The future direction of hard cans is: The easy-open lid hard cans are difficult to open. In recent years, a number of easy-open-canned cans have been introduced into the ranks of military foods, such as 962-diameter cans of 90 millimeters and the eight-treasure porridge cans of relatively small diameters, but they cannot meet the requirements of military cans because military cans use the largest diameter of 100 millimeters. 1068 cans. Due to technical reasons, such large-caliber, easy-open domestic products still fail. In addition, there are still technical problems such as easy breakage of the pull ring and uneven depth of the reticle. Therefore, the development of easy lids is one of the main directions for the development of military cans in the future.
Shaped cans The foreign army actually uses a rectangular flat box. The material it uses is chrome-plated tinplate. It is actually a two-piece can and consists of a bottom and a lid. The can can be used as a cookware, heated or insulated on a fire or on a steam cooker; it can also be used as a tableware to replace the dish and improve the convenience of military foods. At present, China does not have the ability to produce such large rectangular cans. Its technical difficulty is mainly due to the high rejection rate at the time of sealing, resulting in high production costs.
Soft packaging cans are mainly used by military forces in individual foods in field foods. The canned packaging will develop in the following direction: aluminum foil in aluminum foil bags has good barrier properties, including gas and light, but poor resistance to wrinkles. Anti-wrinkle performance can be improved by compounding with other materials.
Natural degradation In view of the demand for environmental protection, develop flexible packaging materials that can degrade naturally.
In the production of heat sealed soft cans, if the bag mouth is contaminated, such as oil stains, seals, or can not be tight or the strength is reduced, this problem has a great impact on the production speed, and also affects the product quality. At present, relevant experts are discussing the use of a new heat sealing layer, which still has good sealing strength under the conditions of oil contamination. This breakthrough in technology will have a major impact on flexible packaging technology.
Composite packaging development of new semi-hard canned materials will be one of the directions for future development of military cans.
Multi-layer co-extruded packaging This material uses EVOH as a barrier material and can withstand high temperatures of 121°C. Because plastics have a good formability, it is easy to form grids, and the top is made of heat-sealing plastic composite materials. In this way, there are several types of meals in one box. This is difficult for metal cans. Domestic companies have trial-produced such packaging materials.
Dry product packaging Dry products are resistant to storage at room temperature, so many military foods use this form. Our military dry products use a wide range of materials, such as tinplate, aluminum foil and composite packaging materials. Most military dry products contain fats and oils, some of which are still relatively high, such as compressed dry foods.
The most critical factor affecting the shelf life of these foods is fat oxidation. Therefore, such products must be packed with good oxygen barrier properties. According to the current situation of packaging development, products like tinplate tins, aluminum foil bags and multi-layer composite bags will be used in large quantities in military foods.
Edible packaging Some foreign troops are studying edible packaging. This kind of packaging is often used for internal packaging. On the one hand, it can reduce the volume and quality of packaging, and increase the edible portion of the whole set of food; on the other hand, it can increase the convenience of use, reduce food contamination, dregs, etc. At present, our military has less research on edible packaging, but this will be a very promising research content.
Insulation packaging In order to enhance the sensory acceptance of military foods, the military has developed a non-flaming heater that automatically heats. This heater can heat the canned food center temperature to about 60°C. In order to effectively increase the heating efficiency, prevent the loss of heat, and prevent the temperature from being burned to the skin, insulation materials are needed. This packaging material requires a small volume and good heat insulation.
Due to the rapidity and flexibility of combat operations, protective packaging requires military foods to stand up to airdrops and umbrellas, float on water, and prevent damage and pollution caused by the explosion of nuclear weapons. At present, there are foam plastics, glass wool, etc. used as protective packaging. These two kinds of materials can both float on the water surface and also can better cushion the impact force generated by airdrop. Research in this area needs to be further strengthened.
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