Views: 202 Author: Site Editor Publish Time: 2021-08-23 Origin: Site
Vacuum bag is to pump out all the air in the packaging container and seal it, and keep the vaccum seal bags in a high decompression state. Applications include plastic vacuum packaging, aluminum foil packaging, glassware packaging, etc. Packaging materials can be selected according to the types of foods.
The properties of food vacuum packaging materials directly affect the storage life and taste of food. In vaccum storage bags, choosing good packaging materials is the key to the success of packaging. When it comes to vacuum packaging materials, it is essential to classify materials. The following are the characteristics of various materials suitable for vacuum packaging:
1. PE is suitable for low temperature and RCPP is suitable for high temperature cooking;
2. PA is to increase physical strength and puncture resistance;
3. AL aluminum foil is to increase barrier performance and shade;
4. PET increases mechanical strength and has excellent stiffness.
The main functions of vaccum pack bags are not only deoxidizing and keeping quality, but also resisting pressure, blocking gas and keeping fresh, which can more effectively keep the original color, aroma, taste, shape and nutritional value of food for a long time. In addition, many foods are not suitable to use for vacuum packaging, but must be packed by vacuum aeration. Such as crisp and fragile food, easily deformed and oily food, and food with sharp edges and corners or high hardness that will puncture the packaging bag. After the food is packed in food saver vaccum, the inflation pressure inside the packaging bag is greater than the atmospheric pressure outside the packaging bag, which can effectively prevent the food from being crushed and deformed under pressure without affecting the appearance and printing decoration of the packaging bag.
The strong vacuum storage bags are filled with single gas of nitrogen, carbon dioxide and oxygen or mixed gas of two or three gases after vacuum. Nitrogen is an inert gas, which plays a filling role to keep positive pressure inside the bag, so as to prevent air outside the bag from entering the bag and protect food.
Plastic food vaccum bags generally have different types, sizes and uses, one of which is laminated bag, which is often seen in restaurants because it is very suitable for storing some perishable products such as meat and cheese. The other is Zip Lock Plastic Packing Bags, which is usually equipped with a small zipper, so it is beneficial to reuse. And the third is vacuum sealed bag, which can keep food fresh without air.
When buying vacuum packaging bags, we should also consider some factors. First of all, the size of the vaccum seal packages. Different sizes of food should be packed in appropriate sizes. Another factor is the frequency of usage. For some foods that are easy to rot, it is best to choose some bags with smaller sizes. The third factor is thickness. Many plastic vaccum packager pouches are very durable and can be reused. The last factor is bag rolls, which is a very convenient choice, because you can cut different sizes of packaging bags, which is more flexible than other packaging bags.