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Packaging aluminum foils have many advantages such as non-toxicity, heat conduction, shading, moisture barrier, and fragrance retention, so it is widely used. Aluminum foil is made by electrolytic aluminum rolling, it has a shiny metallic luster, non-toxic, tasteless, odorless, excellent light-shielding, and a reflectance of 95%. It is stable at high and low temperatures, good barrier properties, moisture-proof, air-proof, fragrance, moisture and oxygen barrier.
The alloy of aluminum foil for packaging are 3003, 8011, 1235, 1145 and 8021, the thickness is 0.009-0.2mm. Aluminum foil is widely used in the packaging field, mainly including tobacco packaging, food packaging, pharmaceutical packaging, beer seals and daily chemical packaging. Aluminum foil is widely used in flexible packaging. Due to its low strength, it is easy to break at the beginning of folding, so it is rarely used alone. So packaging foil is generally laminated with paper, cellophane, polyethylene film as a composite packaging material. According to different types of adhesives, the composite packaging materials are glued composite, dry composite, extrusion composite, cast composite, etc. to make up for its easy cracking and lack softness, no thermal adhesives and other disadvantages. When packaging aluminum foils are compounded with other materials, the airtightness and moisture resistance of other materials should be considered. Composite aluminum foil and polyester film can greatly improve folding resistance. Haomei can supply pure aluminum foil roll with high flatness, accurate thickness and width, which can used for packaging with safety and FDA certificate.