What are the advantages and disadvantages of aluminum foil bags?

Aluminum foil bags are more and more widely used in food packaging. Aluminum foil bags are bags containing aluminum foil in composite materials. Aluminum foil bags are widely used and are related to the material properties of the aluminum foil itself. According to the unique physical properties of aluminum, aluminum foil bags are light and shiny, have strong reflective ability, can be used as heat-proof and insulating packaging, have good barrier properties, are impermeable to gas and water vapor, have strong temperature adaptability, stable shape at high or low temperature, and light-shielding properties. , excellent fragrance retention and so on. After being laminated and compounded with other high-barrier materials, it is made into an aluminum foil bag product, which has good functions of moisture resistance, barrier, light protection, permeability resistance and beautiful appearance, and can be vacuum packed.

Advantages and disadvantages of aluminum foil packaging bags

The biggest advantage of the aluminum foil in the aluminum foil bag is that it blocks oxygen and moisture very well, and the water permeability and oxygen permeability are both 1, which is a good barrier material. In addition, the aluminum foil in the aluminum foil bag has good heat resistance, good light reflectivity and gloss, good shape at high temperature and low temperature, suitable for high temperature cooking, and can withstand up to 125 degrees Celsius.

However, as the material itself, the aluminum foil in the aluminum foil bag also has its own limitations. First of all, the biggest disadvantage of aluminum foil is that it is very brittle and easy to break. more difficult to combine.

Secondly, the biggest disadvantage of aluminum foil is poor acid resistance, so when packaging juice or acidic items, it is generally not placed in the inner sealing layer, so as to ensure that the layer will not be penetrated by acid and separated. Furthermore, it has no heat sealability and cannot be used as the innermost layer of a composite bag. Based on the above material characteristics, the aluminum foil in the aluminum foil bag can only be used as the middle material of the bag.

 Aluminum foil bag material

In daily production, aluminum foil packaging bags generally adopt a four-layer structure. According to different uses, the materials of aluminum foil packaging bags can also be divided into: PET/NY/AL/PE (general packaging), and PET/NY/AL/CPP (high temperature cooking) ). The characteristics of the materials of each layer are as follows: PET-good printing effect, NY-low oxygen permeability, PE-inner layer of ordinary packaging, CPP-inner layer of high temperature cooking, AL-strong barrier property and opaque. In production, by perfectly compounding the materials of each layer, the aluminum foil packaging bag made has the above-mentioned various excellent characteristics at the same time. At the same time, aluminum foil bags can be made into different bag types, such as three-side sealing bags, self-supporting zipper bags, and yin-yang bags. According to different bag types and functional purposes, aluminum foil packaging bags are widely used in many industries. There are: First, food packaging bag series: rice, meat products, dried fish, aquatic products, preserved meat, roast duck, roast chicken, roast pig, quick-frozen food, ham, cured meat products, sausages, cooked meat products, pickles, Bean paste, condiments, etc., can preserve fragrance, quality, taste and color. Second, it is suitable for packaging of various circuit boards, electronic products, precision machinery parts, consumer goods, industrial products, etc. For example: PC boards, IC integrated circuits, electronic components, SMT patches in various LED industries, light strip packaging, precision hardware, auto parts and other packaging.