Aluminum foil bags refer to a type of composite bags that contain aluminum foil. These bags are made by dry laminating aluminum with other high-barrier materials, utilizing the unique properties of aluminum.
The primary film substrates for composite bags include: printable outer layer films such as BOPA, BOPET, and BOPP; heat-sealable inner layer films like CPP and PE; and co-extruded films. Aluminum foil (AL) is also a component, typically used as an intermediate layer. These materials are bonded together into composite films as required.
The foil bags have a metallic sheen, the filling and sealing machines exhibit high reflectivity to heat and light, and the printing colors on the foil bags are more exquisite and bright.
Aluminum foil bags offer excellent insulation and protective properties, featuring impermeability to gases and moisture. As a result, vacuum forming sealing machines can effectively prevent the contents from absorbing moisture and vaporizing, making them resistant to bacterial and insect infestations. They also maintain good shape stability and are unaffected by humidity changes.
Partially aluminum-coated with shielding or descaling methods allows for any pattern and transparent window, enabling customers to view the packaged contents. This represents a significant advancement in aluminum foil bag production technology and a notable feature of the foil bags.
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