Food grade
aluminum foil is an odorless, non-toxic and opaque packaging material, which can directly contact with food without any worries that can harm human health. Therefore it is widely used in food packaging in various forms.The properties of
aluminum foil for food packaging has great effect on whether it can meet your specific need. What are the main properties of food
aluminum foil?Mechanical PropertiesThe mechanical properties of
aluminum foil mainly include tensile strength, elongation, and crack strength, which is mainly determined by the thickness. In general,
aluminum foil is light in weight, good in ductility, thin in thickness, and small in mass per unit area.However, it is low in strength and easy to tear, and it is easy to break and produce perforations when folded, so it is generally not used alone for packaging products. In many cases, it is compounded with other plastic films and paper to overcome its shortcomings.High barrierFood grade
aluminium foil has a high barrier to water, water vapor, light, and fragrance, and is not affected by the environment and temperature. Therefore, it is often used in fragrance-preserving packaging, moisture-proof packaging, etc. to prevent moisture absorption, oxidation and volatile deterioration of the goods.Corrosion resistanceAn oxide film is naturally formed on the surface of the
aluminum foil. The formation of the oxide film can further prevent the continuation of oxidation. Therefore, when the content of the package has high acidity or alkalinity, it is often coated with a protective coating or PE on the surface to improve Its corrosion resistance.Heat resistance and low temperature resistanceThe
aluminum foil is stable at high and low temperatures. It does not expand and contract when the temperature is between -73 ~ 371 ℃, and it has good thermal conductivity, and its thermal conductivity can reach 55%. Therefore, it can be used not only for high temperature cooking or other thermal processing, but also for frozen packaging.Light shielding propertyAluminum foil has a good light-shielding property, its reflectivity can be as high as 95%, and its appearance is silver-white metallic luster. The surface printing decoration can show good packaging and decoration effects, so
aluminum foil is also a high-end packaging material.As a food packaging
aluminum foil manufacturer, Haomei Aluminum has comprehensive specifications for you to choose from. Welcome to inquire from us.