Brown back foil, also known as kraft back foil, is a type of packaging material that is commonly used in the food industry for its excellent barrier properties. The foil is made by laminating a layer of aluminum foil to a layer of kraft paper, creating a product that is strong, durable, and resistant to moisture, grease, and other contaminants. In this article, we will take a closer look at brown back foil, its properties, and its applications.
Properties of Brown Back Foil
Brown back foil is a laminate of two materials: aluminum foil and kraft paper. The aluminum foil provides an excellent barrier to light, oxygen, moisture, and other contaminants, while the kraft paper provides strength, durability, and a brown backing that can be printed on. The thickness of the aluminum foil layer can vary, depending on the application, but it is typically between 6 and 9 microns.
The kraft paper layer of brown back foil is usually made from unbleached or bleached kraft pulp. It is typically between 25 and 60 grams per square meter (gsm) in weight, with higher weights providing greater strength and durability. The kraft paper layer is bonded to the aluminum foil layer using a heat-sealing adhesive, which ensures that the two layers stay together and provide a strong, durable product.
Applications of Brown Back Foil
Brown back foil is commonly used in the food industry for packaging products such as butter, cheese, chocolate, and other confectionery items. It is also used for packaging pharmaceuticals, cosmetics, and other products that require a high level of protection against moisture, light, and oxygen.
One of the advantages of brown back foil is its printability. The kraft paper layer provides a brown backing that can be printed on using a variety of printing techniques, including flexographic, gravure, and offset printing. This makes brown back foil an ideal choice for packaging products that require high-quality printing, such as confectionery items and cosmetics.
Another advantage of brown back foil
is its eco-friendliness. The kraft paper layer is made from renewable resources, and it is biodegradable and recyclable. This makes brown back foil a sustainable packaging choice for companies that are committed to reducing their environmental footprint.
Brown back foil is a versatile packaging material that offers excellent barrier properties, strength, and durability. It is commonly used in the food industry for packaging products that require a high level of protection against moisture, light, and oxygen. Its printability and eco-friendliness make it an ideal choice for companies that are looking for a sustainable packaging option. Overall, brown back foil is a reliable and cost-effective packaging solution that meets the needs of a wide range of industries.