Views: 0 Author: Site Editor Publish Time: 2022-08-12 Origin: Site
The color of the tin foil is silver white, and the ash after burning is golden yellow. Its main components are tin and aluminum, an alloy of tin and aluminum; Its conductivity and thermal conductivity are very good. It can also be made into a lampshade to make the lamp brighter.
The thermal insulation of tin foil is very good, and the tin foil has good smoothness and heat reflection.
Aluminum foil is made of aluminum foil backing paper and aluminum foil paste. It is soft and easy to deform, like paper, and does not rebound after deformation. It can be determined qualitatively to ensure that it is shielded from light, does not fall, does not transmit light, is pollution-free, and is cheap. It is used for moisture-proof and decorative packaging of high-grade cigarettes, sweets and other foods.
Different materials and processes
Aluminum foil is made of metal aluminum or aluminum alloy by rolling equipment, and the thickness is generally less than 0.025mm; The tin foil is made of metal tin or tin aluminum alloy by rolling equipment.
Different physical and chemical properties
The melting point of aluminum foil is 660 ℃, the boiling point is 2327 ℃, and the appearance is silver white light metal. It has ductility and can form an oxide film to prevent metal corrosion in humid air. The melting point of tin foil is 231.89 ° C, and the boiling point is 2260 ° C. It has the characteristics of good corrosion resistance and low melting point, and the appearance is silver white and slightly blue metal.
Different tolerance
Aluminum foil will be corroded in a humid environment, like a metal oxide film, while tin foil has good corrosion resistance.
Different appearance characteristics
Tin foil is much brighter than aluminum foil. The tin foil sold is usually stacked one by one, with cotton paper between each, which is difficult to cut and expensive; The aluminum foil paper is hard and easy to cut. It is mostly packaged in roll form, and the price is relatively low. Therefore, it gradually replaces the tin foil paper and becomes the mainstream of the market.
Both aluminum foil and tin foil can be used to wrap food materials for barbecue, prevent meat from being burnt, and maintain the flavor of food materials. It is better to use aluminum foil for baking and wrapping food.
Because the tin foil is softer than the aluminum foil, and the melting point of the tin foil is lower than that of the aluminum foil, the temperature required for ordinary barbecue food and baked food is relatively high, and the aluminum foil needs to be melted at 660 ℃, while the melting point of the tin foil is 231 ℃, and the embrittlement begins above 160 ℃, so the role of the aluminum foil is more extensive. In addition, the price of aluminum foil is also lower than that of tin foil, so aluminum foil is often used to replace tin foil in modern times.
