The food vacuum packaging bag is also called a decompression packaging bag, which is to extract all the air in the packaging bag at the same time, so that the contents inside the vacuum packaging bag can be isolated from the air, the contents are not easy to contact with oxygen in the air, and the microorganisms in the air are difficult to survive without oxygen, so that the contents will not be pathogenic and can prevent food deterioration, the principle is very simple, but the effect of extending the shelf life and shelf life of the contents is relatively good.
Hongtai packaging products have passed a large number of experiments to prove that when the oxygen concentration in the packaging bag is less than or equal to 1%, the growth and reproduction speed of microorganisms will drop sharply, and the oxygen concentration is less than or equal to 0.
At 5%, most microorganisms will be inhibited and stop breeding.
First, the use of vacuum packaging bags with the practicality of vacuum packaging bags recognized by the public, vacuum packaging is becoming more and more popular in the market.
Using the same principle, food packaging on the market will use nitrogen filling to isolate the contents from oxygen in the air, which can also achieve the effect of prolonging the shelf life and shelf life of the contents.
The common vacuum packaging bags in our life include tea vacuum packaging bags, chicken claw vacuum packaging bags, fish vacuum packaging bags, dried fruit vacuum packaging bags and other easily oxidized and deteriorated foods, as well as inflatable protective packaging bags for fluffy products such as wool products.
With the continuous improvement of people's requirements for quality of life, vacuum packaging bags have occupied a pivotal position in our life. Vacuum packaging bags are a typical field of Packaging Technology Extension, has an irreplaceable role.
Second, vacuum packaging bag materials, in the food industry, the performance of packaging bag materials directly affects the shelf life of food storage and the taste of food. When all food packaging bags are selected, choosing good packaging materials is the key to success.
When it comes to vacuum packaging bags, we need to talk about the classification of vacuum packaging bag materials.
Vacuum Packaging bags are divided into PE film vacuum packaging bags, RCPP film vacuum packaging bags, PA film vacuum packaging bags, aluminum foil film vacuum packaging bags and PET film vacuum packaging bags according to different materials.
1. PE is suitable for low temperature use, RCPP is suitable for high temperature cooking;
2, AL aluminum foil is to increase the barrier performance, shading;
3, PET, increase mechanical strength, excellent stiffness.
4, PA is to increase physical strength, puncture resistance;
Three, vacuum packaging bag Characteristics 1, high barrier: the use of different plastic materials with high barrier performance co-extruded film, to achieve high barrier effect on oxygen, water, carbon dioxide, odor, etc.
2. Stable performance: Oil resistance, moisture resistance, low temperature freezing resistance, quality assurance, preservation and odor preservation, which can be used in vacuum packaging, aseptic packaging and inflatable packaging.
3. High strength: the coextruded film has the characteristics of stretching during processing. The plastic can be stretched to improve the strength, and the plastic materials such as nylon and polyethylene can be added in the middle, it has a composite strength that exceeds the general plastic packaging, there is no layered peeling phenomenon, good softness and excellent heat sealing performance.
4. Small volume ratio: the coextruded film can be packed in vacuum shrink packaging, with a volume ratio of nearly 100%, which is incomparable to glass, iron cans and paper packaging.
5. Low cost: compared with glass packaging, aluminum foil packaging and other plastic packaging, Coextruded films have great advantages in cost to achieve the same barrier effect.
Due to the simple process, the cost of the produced film product can be reduced by 10-
20% 6, flexible specifications: can meet your different needs for different products.
7. No pollution: No binder, no residual solvent pollution, green and environmental protection.
Four, vacuum packaging bag printing vacuum packaging bag two-layer packaging printing: PA/PE, PA/RCPP, PET/PE or PET/RCPP.
The three-layer packaging and printing of vacuum packaging bags are: PET/PA/PE, PET/AL/RCPP, PA/AL/RCPP.
The four-layer packaging printing of the vacuum packaging bag includes: PET/PA/AL/RCPP 5, aluminum foil vacuum packaging bag, aluminum foil vacuum packaging bag is a vacuum packaging bag made of aluminum foil film, aluminum foil film and other materials, aluminum foil vacuum packaging bag has strong barrier property and shading property.
We know that aluminum foil film is divided into pure aluminum film and aluminized film, so vacuum packaging bags are divided into pure aluminum vacuum packaging bags and aluminized vacuum packaging bags. Pure aluminum vacuum packaging bags have stronger shading and better moisture resistance compared with aluminized vacuum packaging bags, pure aluminum vacuum packaging bags look higher and the price is slightly more expensive. The inner bag of tea packaging is our commonly used aluminum foil packaging bag.
Six, inflatable vacuum packaging bag, inflatable vacuum packaging bag is to fill the vacuum packaging bag with nitrogen, nitrogen dioxide, one or more gases in a single gas after vacuumizing, the air pressure in the inflated bag is greater than the atmospheric pressure outside the bag. This effect is not only the oxygen removal and quality assurance function of the vacuum bag, but also the pressure resistance, gas resistance and preservation, compared with vacuum packaging bags, inflatable vacuum packaging bags can more effectively maintain the original color, aroma, taste, shape and nutritional value of food for a long time.
In addition, many foods are not suitable for vacuum packaging and must be inflated vacuum packaging. Such as crispy and fragile food (Bread inflatable vacuum bag)
, Easy to agglomerate food, easy to deform oil food, food with sharp edges or high hardness will puncture the bag.