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

Why Is Prepainted Aluminum Used for Bottle Cap

 Bottle caps are essential for sealing all kinds of containers. Food and drinks are therefore optimally protected throughout their shelf life. One of the main bottle cap materials is the prepainted aluminum.

The painted aluminum sheet refers to an aluminum coil that is processed into aluminum sheets, then surface processed and coated with one or several layers of organic coatings such as polyester, fluorocarbon polyester, and then baked and solidified.

After the aluminum coil is coated, the paint covers its surface to form a firmly adherent continuous coating with corrosion resistance, which isolates the aluminum coil base from the corrosive medium, thereby preventing or slowing down damage caused by corrosion.

By using the diversity of paint colors and painting techniques, aluminum sheet can be painted to obtain decorative coatings of different colors, glosses, etc., making their appearance bright and dazzling, or rich in tone, which gives people a pleasing feeling, thereby increasing the added value of the product and expanding the application scope of the aluminum sheet.

Since the middle of the last century, the roller coating has been the main method. The production of color-coated aluminum coils is carried out by a precision coating machine evenly coating the surface of the pre-treated aluminum coils with the same thickness, entering the oven with an exhaust device at a constant speed, and using infrared or hot air circulation baking processes to bake and solidify.

Roller coating uses the coating roller as the carrier of the paint. The paint forms a wet film of a certain thickness on the surface of the coating roller. The coating roller contacts the object to be coated during rotation, and the paint is applied to the surface of the object to be coated.

Roller coating is suitable for coating flat metal plates, especially for high-speed coating of metal coils. Roller coating has the characteristics of fast coating speed, high production efficiency, and 100% paint utilization rate.

As one of the big painted aluminum sheet metal suppliers, the coating Haomei Aluminum chooses is of food grade and doesn’t contain BPA. It also has good adhesion and can withstand the test of high-temperature cooking. Welcome to leave message below to inquire what you need.

Original Source: https://www.alclosuresheet.com/a/why-is-prepainted-aluminum-used-for-bottle-cap.html