The main application range of vacuum packaging bags is in the field of food, and it is used in the range of food that needs to be stored in a vacuum environment. It is used to extract air from plastic bags, and then add nitrogen or other mixed gases that are not harmful to food.
1. Prevent the growth environment of microorganisms in a vacuum environment, avoid the pollution of the surrounding environment, reduce the oxidation rate of fat in the food, and inhibit the growth environment of the existing enzyme microorganisms.
2. The vacuum packaging bag can prevent the moisture of the food from evaporating, reduce the loss of water and maintain the quality of the product.
3. The aesthetics of the vacuum packaging bag itself makes it easy for people to have an intuitive feeling about the product and increase the desire to buy.
Let’s talk about the specific selection of vacuum packaging bags, and the selection of different types of vacuum packaging bags is different.
PE material: suitable for low temperature vacuum packaging bags. More packaging for frozen products.
PA material: good flexibility and high puncture resistance.
PET material: increase the mechanical strength of the packaging bag product, and the cost is lower.
AL material: AL is aluminum foil, which has high barrier properties, shading properties, and moisture resistance.
PVA material: increased barrier properties, high barrier coating.
RCPP material: the most widely used material for high temperature cooking bags, suitable for high temperature use.
The vacuum packaging bags are made of polyvinylidene chloride, polyester, and polyamide materials that are anti-oxidative, that is, prevent oxygen permeability and good shrinkage; some of them will be composited with nylon, polyester film and polyethylene multi-layer materials. The polyvinylidene chloride material mentioned above is the type of film with the best effect of blocking oxygen and water vapor, but it is indeed not resistant to heat sealing. Polyester has great tensile strength. Nylon has good oxygen barrier properties and good heat resistance, but the water vapor transmission rate is too large and the manufacturing cost is high. Therefore, in general, most manufacturers will choose composite materials to choose the advantages and disadvantages of various films. Therefore, when many customers use and choose vacuum packaging bags, we have to analyze the characteristics of the contents and select suitable materials according to their characteristics.
Post time: Jul-19-2022