Surface treatment agent of waste and old easy open can surface

Abstract

The invention discloses a surface conditioning agent used for synchronously removing a stoving varnish coating on the surface as well as an anti-corrosion film on the internal wall of a pop can. The surface conditioning agent is composed of methylene dichloride, trifluoroacetic acid and water. The preparation method of the surface conditioning agent includes that water solution of trifluoroaceticacid with a preset portion is put into a container with the methylene dichloride available. By applying the film release agent to the film release of the pop can, a paint coating on the external wallof the pop can bubble after 2min to 5min and can completely strip after 10min while the stripping of the film on the internal wall takes 5min. Additionally, the surface conditioning agent is reusablefor several times.

Description

technical field [0001] The invention discloses an agent and a configuration method capable of simultaneously treating the baking varnish coating on the surface of pop cans and the anti-corrosion film on the inner wall. technical background [0002] By the end of the last century, the world consumed 180 billion cans every year, and consumed more than 2.5 million tons of aluminum, accounting for about 15% of the world's aluminum consumption. The recycling and recycling of cans can not only save bauxite, but also save 97% of energy. Strict pretreatment is necessary to remake high-quality aluminum or aluminum alloy materials from waste aluminum cans. [0003] In addition to cleaning the dirt on the surface with detergent, etc., it is mainly the treatment of the surface paint layer and inner wall film of the tank body. The treatment method and the rate of paint removal and film removal directly affect the quality of the aluminum or aluminum alloy material as well as the cost of...

AI Technical Summary

Problems solved by technology

Advantages: high paint removal rate, less pollution; Disadvantages: large loss of inner aluminum, not suitable for large-scale production

Disadvantages: complex process

Advantages: high paint removal rate, high aluminum recovery rate, less impurities; Disadvantages: paint removal rate is significantly affected by solvent concentration

Advantages: simple method, good craftsmanship; Disadvantages: serious pollution, high impurity content, high cost, high energy consumption

The above methods require too many types of drugs, and can only simply remove the surface baking paint coating, but not the inner wall film