Preparation method of ultrathin double-zero aluminum foil and double-zero aluminum foil

Abstract

The invention discloses a preparation method of ultrathin double-zero aluminum foil and double-zero aluminum foil, and the preparation method comprises the following steps: mixing 40 parts by weight of aluminum ingot, 40 parts by weight of liquid material and 40 parts by weight of secondary recycled aluminum scrap according to a proportion, and putting the mixture into a smelting furnace to prepare molten aluminum, with the total weight of 100 parts by weight of the aluminum ingot, the liquid material and the secondary recycled aluminum scrap being 100 parts by weight; the content of the liquid material is 55 parts by weight, and the content of the secondary recycled waste aluminum sheet is 5 parts by weight; the molten aluminum is subjected to refining, degassing and deslagging treatment; casting and rolling the molten aluminum to form a first aluminum plate, wherein the thickness range of the first aluminum plate is 3-4 mm; cold rolling is conducted on the first aluminum plate, so that a second aluminum plate with the thickness ranging from 0.25 mm to 0.35 mm is formed; and multiple passes of rolling are conducted on the second aluminum plate to form the aluminum foil with the thickness ranging from 0.0045 mm to 0.006 mm. The multi-pass rolling process is adopted, the bottleneck in the prior art is broken through, the thinner aluminum foil with fewer pinholes and better plate shape can be produced, and the production requirements of customers with higher requirements are met.

Description

technical field [0001] The invention relates to the technical field of aluminum foil production, in particular to a preparation method of an ultra-thin double-zero aluminum foil and the double-zero aluminum foil. Background technique [0002] Aluminum foil is widely used in the packaging of food, medicine and cosmetics because of its excellent barrier properties (including light barrier, oxygen barrier, moisture resistance, etc.). At present, 1235 and 8079 alloys are used for double-zero aluminum foil with a thickness of less than 0.009mm at home and abroad, but it is difficult to meet some special requirements such as high-strength customers. Due to the thinning of the aluminum foil, especially for the 8011 alloy, the pinhole increases exponentially. The 8011 alloy has a high yield strength and a fast rolling speed, and the uneven heat generated by the roll is difficult to control. Contents of the invention [0003] In order to overcome the defects in the prior art, an e...

AI Technical Summary

Problems solved by technology

At present, 1235 and 8079 alloys are used for double-zero aluminum foil with a thickness of less than 0.009mm at home and abroad, but it is difficult to meet some special requirements such as high-strength customers.

Due to the thinning of the aluminum foil, especially for the 8011 alloy, the pinhole increases exponentially. The yield strength of the 8011 alloy is high, the rolling speed is fast, and the uneven heat generated by the roll is not easy to control.