Aluminum Foil for Induction Sealing

 In the packaging industry, the production process is determined by the product dosage form, but the packaging link occupies a large proportion. Packaging plays an extremely important role in product quality assurance, and there are many types of materials used in packaging.

Among them, due to its good mechanical properties, barrier properties, safety properties, and its superior processing properties, aluminum foil for induction sealing has good sealing properties, excellent freshness retention and light shielding properties, which can prevent oxidative deterioration of products.

Its sealing can ensure a tight, smooth and easy-to-tear effect. It can also improve the advertising effect and product value through printing technology. Therefore it is widely used in the packaging industry.

The technical principle of aluminum foil sealing is to heat the aluminum foil sealing gasket through electromagnetic waves, so that the heat sealing layer of the aluminum foil sealing gasket is heated and melted, and the heat sealing layer is bonded to the bottle mouth under certain pressure conditions, thereby achieving a rapid non-contact air seal.

Aluminum foil's compatibility with heat-seal paint, coupled with the metal's excellent thermal conductivity and stability, make it an ideal material for capping and heat-sealing a variety of plastic milk containers. Whether the milk is fresh, aseptically filled or sterilized in containers, foil/coating combinations can be designed to meet processing and distribution needs.

The heat sealing aluminum foil alloys are usually 8011 aluminum foil and 8079 aluminum foil. The 8 series heat sealing foil has fewer holes, good barrier and heat sealing properties, and the product is clean of oil and has a clean surface. The aluminum foils reach ood grade, which can be steamed at high temperatures, and is hygienic.

The aluminum foil is the carrier of the adhesive layer, and its quality has a great influence on the heat sealing strength of the product. Especially the oil on the surface of the original aluminum foil will weaken the bonding force between the adhesive and the original aluminum foil. If there is oil on the surface of the original aluminum foil and the surface tension is lower than 31×10-3μm, it will be difficult to achieve the ideal heat sealing strength, so the quality of the aluminum foil must be strictly controlled.

Original Source: https://alclosuresheet.com/a/aluminum-foil-for-induction-sealing.html