Among the various uses, aluminum foil for packaging is the most important application field. After compounding it with other materials, it can be used for food packaging, pharmaceutical packaging, tobacco packaging, beer labeling, and daily chemical packaging.
The medical aluminum foil is 8011, 8021, 8079,etc. The tempers are O, H14, H16, and H18. The aluminum foil thickness in centimeters is 0.0016 to 0.02 cm. It has the advantages of flat plate shape, water brushing grade A, high cup convex value, and very few pinholes.
Food packaging is mostly made of 8011 aluminum foil, which has a certain protective effect on food, and the aluminum foil packaging has strong barrier performance, which can be used for frozen food, barbecue, roast chicken and other cooked food products. It can also be used in the packaging of pickles, seasonings and other condiments, or can be used in the packaging of snack foods in shopping malls. The thickness is usually 0.002-0.004 cm.
Aluminum foil for lithium ion battery is usually used in the current collector of lithium ion battery. Generally, most manufacturers of lithium ion battery use rolled aluminum foil as the positive electrode current collector. The thickness of aluminum foil for lithium ion battery varies from 0.001-0.005 cm. The commonly used aluminum foils for lithium ion batteries are mainly 1 series and 3 series, including 1060, 1050, 1235 and 3003 aluminum foil.
Difficulty control of aluminum foil gauge error is a feature of aluminum foil rolling. The thickness difference of 3% is not difficult to control in the production of aluminum sheet. but it is more difficult to control in the production of aluminum foil. As the thickness of the aluminum foil decreases, many trace conditions can affect it, such as temperature, oil film, and oil and gas concentration.
A roll of aluminum foil can be rolled up to hundreds of thousands of meters, and the rolling time is about 10 hours. The only way to adjust aluminum foil gauge is tension and speed. These factors all cause the difficulty of thickness control in aluminum foil rolling. With mature processing techniques, Haomei Aluminum can realize good control of the aluminum foil thickness.