Aluminum foil as a packaging material, the biggest advantage is that it has excellent light-shielding, moisture-proof, gas-blocking and taste-keeping properties. The excellent barrier properties of aluminum foil bags are incomparable to any plastic film and paper. The disadvantage of aluminum foil bag is that it is easy to tear, wrinkle, easy to be corroded by acid and alkali substances, not resistant to folding and heat-resistant, so it can not be used as a material for packaging materials. It is usually used as the main barrier layer and paper and various The plastic films are compounded together to form a composite material.
Compared with other metals, aluminum foil bags have the advantages of light weight, abundant resources, low price, easy processing, and printing. So far, aluminum foil bags are the only metal materials in composite bags, and aluminum foil bags are widely used in various Barrier packaging of products, such as flavors, spices, dehydrated foods; PTP, high-temperature cooking food packaging; electromagnetic shielding packaging.