Performance of aluminum foil and how does it insulate heat? Describe it precisely and in detail and better give the source
Aluminum foil is widely used in fields like food, beverage, cigarette, medicine, photographic plate and family daily necessities as packaging material; electrolytic capacitor material; insulation material for building, automobile, ship and house; and decorating metallic yarn, wall paper, all kinds of stationery and printings as well as decoration and trademark of light industrial products for its nice properties. Among all these applications, aluminum foil used as packaging material can maximize its characteristics. Aluminum foil material is soft metal film, which is not only moisture-proof, air sealing, light shading, wear resistant, fragnance-holding, non-toxic and tasteless but also has a silvery luster and is easy to print all kinds of beautiful patterns of all colors, so it is easier to be favored. Especially after aluminum foil composited with plastic and paper, it integrates shielding of the aluminum foil, strength of paper and thermal insulation of plastic, and further improves the shielding function of aluminum foil tape as packing material from moisture, air, ultroviolet rays and bacterial, which has greatly expanded the application market of aluminum foil. The packaged items are perfectly protected because the light, moisture and air are completely insulated by packaging material. Especially the package for some steamed food use a kind of composite aluminum foil material which can ensure the food does not spoil for more than a year. Besides, it is easy to be heated and opened up, which is very popular with customers.
Aluminum foil can’t insulate heat by itself but it has strong conductivity for heat. Its function is to reflect heat source.
