While metal is a leading packaging material, different metals are used for a wide range of products across various markets. The most effective and commonly used metals for food packaging include aluminum, tin, and steel. Just as cars, airplanes, and trains have metal structures to provide protection, metal packaging is a preferred choice for ensuring maximum safety for shipped food and beverages. That is why metal accounts for 15% of all packaging worldwide.
Protective coating against contaminants
Metal packaging is generally coated with protective lacquers to prevent food from chemically reacting with the metal. This coating prevents corrosion of metal surfaces. This layer also helps preserve the flavor of the products. In addition, the protective film prevents moisture, oxygen, and bacteria from entering the packaging.
But food manufacturers cannot cut corners on the coating, as it must withstand a range of temperatures. If the coating fails to separate the food from the metal, it can compromise the product’s taste and safety. Global food brands must comply with various national regulations regarding chemical coatings.
Aluminum Cans: Many Benefits
Among all food products, beverages have accounted for 75% of the market over the past decade. Traditional round metal cans dominate this sector. The main metals used for cans are aluminum, tinplate, tin-free steel, and stainless steel.
Aluminum is widely used in metal beverage packaging because of its strength, which effectively protects the product, while also being lightweight and easy to shape. This lightness and flexibility in shape allow for cost-effective storage and shipping.
Aluminum’s durability also makes it an excellent sustainable packaging solution. It can be recycled indefinitely without any loss of quality. It offers a long service life and protects against the harmful effects of light, gases, moisture, and other environmental factors.
The tin can: a proven solution
Perishable foods such as fruits, vegetables, and meats can be preserved for several years in hermetically sealed tin cans. This packaging solution has been in use for more than two centuries. Like aluminum, tinplate provides an effective barrier against corrosion and contaminants. It is also easily recyclable, which helps reduce production costs.
Tinplate is generally made of an alloy of tin and other metals. Many cans start out as a sheet of steel or iron coated with tin. It is used for food, beverages, cosmetics, and pharmaceuticals. The cans are hermetically sealed with very few chemical preservatives to ensure long-term preservation.
The Benefits of Aluminum Foil
Aluminum foil is too thin to be used as outer packaging, but it’s perfect as an inner lining in a container. One of the first food products to be wrapped in aluminum foil was the Life Saverscandy, in 1913. Later, it was used for medicines, prepared meals, popcorn, and various snacks.
Thanks to aluminum’s flexibility, the foil can be manufactured in various thicknesses. There are three main categories: household foil, semi-rigid containers, and flexible foil. Preformed trays can be used for oven-baked dishes. Thin foil protects meat from overcooking thanks to its insulating properties. In addition to reflecting heat, aluminum foil acts as a barrier against steam.
Promote the benefits of metal packaging
Like other metals, aluminum foil is recyclable, but it often ends up in landfills. Brands that use this material can enhance their image while raising public awareness about recycling it. Consumers are happy to recycle aluminum cans, likely thanks to the printed messages that have become ubiquitous.
The future of metal packaging looks promising, particularly because of its shine and attractive appearance. These soothing effects reinforce consumers’ perception of protection and quality. Many decorative tins can be reused indefinitely without ending up in a landfill or recycling center. As environmental awareness continues to grow, food brands must remind consumers why metal remains such a sustainable packaging option.
