What are the characteristics of the composite film of aluminum foil and kraft paper?

The composite film of aluminum foil and kraft paper is a kind of composite material that combines the metallic properties of aluminum foil with the paper properties of kraft paper, and it has the following characteristics and applications:

Excellent Barrier Property

• Gas Barrier Property: Aluminum foil has excellent gas barrier property, which can effectively block the penetration of gases such as oxygen and carbon dioxide. It can prevent the items inside the package from deteriorating due to oxidation, and extend the shelf life of foods, pharmaceuticals, etc.
• Moisture Barrier Property: It can not only prevent external moisture from entering the package, keeping the packaged items dry, but also prevent the moisture inside the package from dissipating, maintaining the original moisture content and taste of the items.
• Light Shielding Property: Aluminum foil can completely block light, avoiding the irradiation of the items inside the package by light, and preventing the items from discoloring and deteriorating due to photochemical reactions. It is especially suitable for light-sensitive products.

Good Mechanical Properties

• High Strength: Kraft paper endows the composite film with high tensile strength and tear strength, making it less likely to be damaged during the processes of packaging, transportation and storage, and effectively protecting the contents inside.
• Good Flexibility: The combination of aluminum foil and kraft paper gives the composite film good flexibility. It can adapt to the packaging of items of different shapes and sizes, and can be folded, bent and other operations without breaking.

Strong Thermal Stability

• High Temperature Resistance: It can withstand a certain degree of high temperature. During the processing of food steaming, baking and other processes, it can maintain the integrity of the packaging and the stability of its performance, and will not deform or release harmful substances due to high temperature.
• Low Temperature Adaptability: In a low temperature environment, the composite film can still maintain good flexibility and strength, and will not become brittle and break. It is suitable for the packaging of frozen foods and other products.
• Environmentally Friendly and Degradable: Kraft paper is a natural renewable resource and is degradable, which can reduce environmental pollution to a certain extent and conforms to the environmental protection concept of modern packaging.
• Good Printing Adaptability: The surface of kraft paper is suitable for various printing processes, and exquisite patterns and text printing can be realized, improving the appearance image and market competitiveness of products.