What is aluminum foil?Direct rolling with metallic aluminium
Characteristic：(1) the surface of aluminum foil is clean and sanitary, and no bacteria or microorganisms can grow on its surface.(2) aluminum foil is a non-toxic packaging material, it can be in direct contact with food, and there is no harm to human health.(3) aluminum foil is an odorless and odorless packing material, which will not cause any peculiar smell of packaged food.(4) if the foil itself is not volatile, the food itself and the packaged food will never dry or contract.(5) there is no grease penetration in aluminum foil, whether at high temperature or at low temperature.
(7) aluminum foil has good plasticity, so it can be used to package products of various shapes. It can also make containers of various shapes at will.(8) the hardness of aluminum foil is large, the tensile strength is large, but the tear strength is small, so it is easy to tear.(9) the aluminum foil itself can not be heated and sealed, and it must be coated with hot material on its surface, such as PE, for thermal sealing.(10) aluminum foil may cause adverse reactions when exposed to other heavy metals or heavy metals.
A metal foil: Aluminium directly rolled into sheets of hot stamping material, the effect of stamping and silver foil stamping similar effects, it is also called the false. Because of its soft texture and good ductility, it has a silvery luster. If the rolled sheet is made of sodium silicate on the offset paper, the foil can be printed. But the aluminum foil itself is easy to oxidize and the color is dull, friction, touch and so on will fade. Therefore, it is not suitable for the long-term preservation of books, covers and other hot stamping.
