The performance of the aluminum foil
1, the mechanical properties
The mechanical properties of the foil including tensile strength, elongation, rupture strength and the like. Mechanical properties of aluminum foil is mainly determined by the thickness, the national standard GB / T3198-2003 "aluminum and aluminum foil(industrial aluminum foil)" in the longitudinal direction of the mechanical properties of aluminum foil made corresponding provisions.
Overall, the quality of light aluminum, ductile, thin, small mass per unit area. But low strength, easy tear, easy to break when folded, produces perforations, it is generally not used solely for packaging products. In many cases, and other plastic film and paper composite, in order to overcome its shortcomings.
2, high barrier
Aluminum foil having water, water vapor, fiber, flavor has a high barrier, and from the environment, temperature, thus preserving flavor commonly used in packaging, moisture-proof packaging to prevent the absorption of moisture contents of the package, and volatile oxidation deterioration. Especially suitable for high-temperature cooking food packaging sterilization.
3, corrosion resistance
Natural surface oxide film is formed of aluminum foil, to form an oxide film may further prevent any further oxidation, and therefore, an aluminum foil having certain durability and air resistance. But it is not acid corrosion, therefore, the contents of the package have a high acidic or alkaline, often coated with PE and other protected material or coated on its surface, in order to improve its corrosion resistance.(Introduces the performance of the aluminum foil(aluminum foil thickness)
4, heat resistance, low temperature performance
Aluminum foil high and low temperature steady state, the temperature -73-371 ℃ without swelling and shrinkage deformation, but also has good thermal conductivity, thermal conductivity up to 55%. Therefore, both can be used for high-temperature cooking or other thermal processing, but also for frozen packaging.(aluminum foil roll)
5, shading performance
Aluminum foil (aluminum foil cost)shielding with good performance, the reflection rate up to 95%, while the appearance of silver-white metallic luster, decorated by the surface printing may exhibit good packaging decoration effect, it is also a high-grade aluminum foil packaging materials.