Aluminum Sealing Foil

Aluminum sealing foil is a composite material specifically designed to seal containers, and it plays a vital role in a wide range of industries. From food to pharmaceuticals to cosmetics, aluminium sealing foil ensures the quality and safety of products with its unique properties.

Aluminum foil for sealing is a composite material with a multi-layer structure, usually consisting of a heat-sealable layer, an aluminum foil layer, a weak adhesive layer and a cardboard elastomer. This design not only gives the sealing foil good sealing properties, but also provides anti-counterfeiting effects and prevents product contents from evaporating or becoming contaminated. In addition, it ensures pure protection of the contents due to its non-odor precipitation.

The production of sealing aluminium foils begins with the melting and casting of pure aluminum into flat ingots, followed by a series of processes such as homogenization, hot rolling, cold rolling and intermediate annealing. Finally, through a further cold rolling process, the aluminum is processed into foil blanks with a thickness of between 0.4 and 1.0 mm. In the case of sealing foils, appropriate surface treatments such as heat sealers and other functional coatings are applied to meet the needs of specific applications.

Commonly used alloys for aluminum sealing foils include 1235, 8011 and 8079. For example, 8011 aluminum foil are available in a variety of material states (O, H14, H16, H18, H19, H22, H24), in thicknesses ranging from 0.018 to 0.2 mm, and in widths up to 100 to 1600 mm. These different specifications are able to meet the needs of a wide range of application scenarios, whether highly flexible or high strength products are required.

Aluminum foil for sealing is often composited with other materials to enhance its functionality and applicability. For example, when making aluminum foil pouches, aluminum foil is used as an intermediate layer in combination with other high-barrier materials, such as BOPP (bi-oriented polypropylene), PET (polyester), or PE (polyethylene), to form a composite film with excellent barrier properties through adhesive lamination technology. Not only does this improve the overall protective capability of the package, but also improves the appearance of the package by making it more aesthetically pleasing.

The main features of sealing aluminium foil are its excellent sealing performance, anti-counterfeiting and anti-theft properties and good moisture-proof and freshness preservation effects. At the same time, it also has a certain metallic luster, which makes the printing color brighter and increases the visual appeal of the goods. In addition, the application of partial aluminizing technology allows the creation of arbitrary patterns and transparent windows on the foil, allowing consumers to directly see the contents of the package.

Aluminum foil for sealing is widely used in several industries, such as food, cosmetics, pharmaceuticals and lubricants. Specific uses cover areas such as yogurt sealing film, pharmaceutical bottle sealing film, and daily necessities packaging sealing film. In addition, flat top aluminum foil pouches and flat top self sealing aluminum foil pouches are widely used because of their good sealing performance.

To sum up, aluminum sealing foil has taken its place in the modern packaging industry by virtue of its excellent sealing performance, versatility and wide adaptability. With the progress of science and technology, we have reason to believe that sealing aluminum foil will continue to develop to better serve more fields.