What is Vacuum Bag.
Vacuum bag, also known as vacuum packaging, is to extract all the air in the packaging container and seal it, maintain the bag in a highly decompressive state, to low oxygen effect, so that microorganisms have no living conditions, to keep the fruit fresh. Applications include vacuum packaging in plastic bags, aluminum foil packaging etc. Packaging materials can be selected according to the type of item.
Main Functions Of Vacuum Bags
The main function of vacuum bags is to remove oxygen to help prevent food spoilage.The theory is simple.Because decay is mainly caused by the activity of microorganisms, and most microorganisms (such as mold and yeast) need oxygen to survive. Vacuum packaging Follow this principle to pump out oxygen in the packaging bag and food cells, so that microorganisms lose the "living environment". Experiments have proved that when the oxygen percentage in the bag ≤1%, the growth and reproduction rate of microorganisms drops sharply, and when the oxygen concentration≤0.5%, most microorganisms will be inhibited and stop breeding.
*(Note: vacuum packaging can not inhibit the reproduction of anaerobic bacteria and food deterioration and discoloration caused by enzyme reaction, so it needs to be combined with other auxiliary methods, such as refrigeration, quick freezing, dehydration, high temperature sterilization, irradiation sterilization, microwave sterilization, salt pickling, etc.)
In addition to inhibiting the growth and reproduction of microorganisms, there is another important function which is to prevent food oxidation, because fat foods contain a large number of unsaturated fatty acids, oxidized by the action of oxygen, so that food tastes and deteriorates, in addition, oxidation also makes vitamin A and C loss, unstable substances in food pigments are affected by the action of oxygen, so that the color becomes dark. Therefore, oxygen removal can effectively prevent food deterioration and maintain its color, aroma, taste and nutritional value.
Material Structures Of Vacuum Packaging Bags And Film.
The performance of food vacuum packaging materials directly affects the storage life and taste of food. When come to the vacuum packing, choosing good packaging material is the key to packaging success.The following are the characteristics of each material suitable for vacuum packaging:PE is suitable for low temperature use, and RCPP is suitable for high temperature cooking;
1.PA is to increase physical strength, puncture resistance;
2.AL aluminum foil is to increase the barrier performance, shading;
3.PET, increase mechanical strength, excellent stiffness.
4.According to the demand, combination, various properties, there are also transparent, in order to increase the barrier performance using water-resistant PVA high barrier coating.
Common lamination material structure.
Two-layers lamination.
PA/PE
PA/RCPP
PET/PE
PET/RCPP
Three layers lamination and Four layers laminations.
PET/PA/PE
PET/AL/RCPP
PA/AL/RCPP
PET/PA/ AL/RCPP
Material Properties Of Vacuum Packaging Bags
High temperature retort pouch, vacuum bag is used to package all kinds of meat cooked food, easy to use and hygienic.
Materials: NY/PE, NY/AL/RCPP
Features: moisture-proof, temperature resistant, shading, fragrance preservation, strength
Application: high-temperature sterilized food, ham, curry, grilled eel, grilled fish and meat marinated products.
The most commonly used in vacuum packaging is mainly film materials, bottles and cans are also used. For the film materials used in food vacuum packaging, it is necessary to ensure that it achieves the best state in terms of packaging effect, beauty and economy of various foods. At the same time, food vacuum packaging also has high requirements for the light resistance and stability of materials. When one material alone cannot meet these requirements, the packaging is often made up of a combination of many different materials.
The main function of vacuum inflatable packaging is not only the oxygen removal and quality preservation function of vacuum packaging, but also the functions of pressure resistance, gas resistance, and preservation, which can more effectively maintain the original color, aroma, taste, shape and nutritional value of food for a long time. In addition, there are many foods that are not suitable for vacuum packaging and must be vacuum inflated. Such as crunchy and fragile food, easy to agglomerate food, easy to deform and oily food, sharp edges or high hardness will puncture the packaging bag food, etc. After the food is vacuum-inflated, the air pressure inside the packaging bag is stronger than the atmospheric pressure outside the bag, which can effectively prevent the food from being crushed and deformed by pressure and does not affect the appearance of the packaging bag and printing decoration. Vacuum inflatable packaging is then filled with nitrogen, carbon dioxide, oxygen single gas or two or three gas mixtures after vacuum. Its nitrogen is an inert gas, which plays a filling role and keeps the positive pressure in the bag to prevent the air outside the bag from entering the bag and playing a protective role in the food. Its carbon dioxide can be dissolved in various fats or water, leading to less acidic carbonic acid, and has the activity of inhibiting mold, putrefactive bacteria and other microorganisms. Its oxygen can inhibit the growth and reproduction of anaerobic bacteria, maintain the freshness and color of fruits and vegetables, and high concentration of oxygen can keep fresh meat bright red.
Features Of Vacuum Packaging Bags.
High Barrier: the use of different plastic materials high barrier performance co-extrusion film, to achieve the effect of high barrier to oxygen, water, carbon dioxide, odor and so on.
Good Performance: oil resistance, moisture resistance, low temperature freezing resistance, quality preservation, freshness, odor preservation, can be used for vacuum packaging, aseptic packaging, inflatable packaging.
Low Cost: Compared with glass packaging, aluminum foil packaging and other plastic packaging, to achieve the same barrier effect, co-extruded film has a greater advantage in cost. Due to the simple process, the cost of the film products produced can be reduced by 10-20% compared with dry laminated films and other composite films.4. Flexible specifications: it can meet your different needs for different products.
High Strength: co-extruded film has the characteristics of stretching during processing, plastic stretching can be correspondingly increased strength, can also be added nylon, polyethylene and other plastic materials in the middle, so that it has more than the composite strength of general plastic packaging, there is no layered peeling phenomenon, good flexibility, excellent heat sealing performance.
Small Capacitance Ratio: co-extruded film can be vacuum shrink wrapped, and the capacity to volume ratio is nearly 100%, which is incomparable with glass, iron cans and paper packaging.
No Pollution: no binder, no residual solvent pollution problem, green environmental protection.
Vacuum packaging bag moisture-proof + anti-static + explosion-proof + anti-corrosion + heat insulation + energy saving + single perspective + ultraviolet insulation + low cost + small capacitance ratio + no pollution + high barrier effect.
Vacuum Packaging Bags Are Safe To Use
Vacuum packaging bags adopt the "green" production concept, and no chemicals such as adhesives are added in the production process, which is a green product. Food Safety ,all materials meet FDA Standard, was sent to SGS for test. We care for packaging as the food we eat.
Daily Life Usages Of Vacuum Packaging Bags.
There are many things in our daily lives that are prone to spoilage, such as meat and grain things. This situation makes many of these easily perishable food processing enterprises have to use a lot of methods to keep these foods fresh during production and storage. This makes the application. Vacuum packaging bag is actually to put the product into the airtight packaging bag, through some tools to extract the air inside, so that the inside of the packaging bag to reach a vacuum state. Vacuum bags are actually to make the bag in a high decompression situation for a long time, and a low oxidation environment with scarce air makes many microorganisms have no living conditions. With the continuous improvement of our living standards, people have also changed considerably in the quality of various items in life, and aluminum foil packaging bags are an indispensable item in our lives, occupying a considerable weight. Vacuum packaging bags are a product of packaging technology that plays a key role in our daily life.
Post time: Nov-25-2022
