Main properties of metal packaging materials
①The metal packaging material has high strength. Therefore, the wall thickness of the packaging container can be very thin, so that the weight is light, the strength is high, and it is not easy to be damaged.
For storage and transportation, it has good protection for commodities.
②The metal packaging material has a unique luster, which is convenient for printing and decoration, and makes the appearance of the product beautiful and gorgeous. In addition, metal foil and gold-plated film are ideal trademark materials.
③Metal packaging materials have good comprehensive protection performance. Metals have low permeability to water and gas, and are opaque, which can effectively avoid harmful effects such as ultraviolet rays. It has good comprehensive performance and can maintain the quality of the goods for a long time.Some packages are valid for up to two years.
④ Metal packaging materials are rich in resources and have good processing performance. The recoverable amount of steel on the earth is 1294 × 10 ° t, ranking first, followed by aluminum, which is 68 × 10 ° t. Metal packaging materials can be processed with different methods to produce containers of different shapes and sizes.
⑤The production of metal cans has a long history and the process is relatively mature. Now it has automated production and high production efficiency.
①Pb and As in metals and solder easily penetrate into food and contaminate food; in addition, metal ions will also affect the flavor of food.
②When the metal container uses phenolic resin as the inner wall coating, if the processing technology is improper, it will also affect the quality of the food.
Main properties of several major types of metal packaging materials
With rich steel resources and low production costs, it ranks first in metal packaging materials. The main properties of steel used as packaging materials are good comprehensive mechanical properties and certain corrosion resistance. In order to meet the requirements of comprehensive mechanical performance, the packaging steel plate mainly uses low-carbon thin steel plate, which is used to manufacture containers, ordinary steel drums, and can also be used as a strapping material, which is widely used in transportation packaging. In order to ensure the requirements of corrosion resistance, tin, chrome, aluminum, galvanization and the application of corresponding coatings can be carried out on the basis of low-carbon thin steel plates to improve their corrosion resistance. Can also be made into sales packaging containers, widely used in food, medicine and other packaging.