The Use of Prepainted Aluminum in Food Packaging

The color coated aluminum sheet refers to aluminum that has been coated with one or more layers of organic coating on its surface after basic processing. It is a deep-processed aluminum product. Depending on the coating used, color-coated aluminum can be divided into high-end fluorocarbon color coating and relatively low-end polyester color coating. According to different application scenarios, color-coated aluminum is divided into three types, namely industrial type, architectural type, and food packaging type.

The prepainted aluminum for food packaging are mainly used to manufacture non-pressure food cans, pressure food cans, can lids, bottle caps, box lids, pull rings, food boxes, various food packaging sealing bags, etc. It is a kind of main bottle cap materials.

Aluminum ingots are processed into aluminum sheet. After deep surface processing (coating or DOS oil pretreatment), the aluminum bottle cap material meets the relevant requirements of food hygiene when it is processed into can lids, pull rings, etc., and has high temperature resistance and corrosion resistance, resulting in the characteristics of complete isolation of the aluminum sheet and bottle content.

Since coated aluminum sheets are used to package food, the requirements for coatings and processes must comply with the relevant regulations of the State Food and Drug Administration (SFDA), and the coatings must obtain FDA certification before they can be produced.

Therefore, the requirements for the preparation and pretreatment of coated aluminum coils are relatively high, and they must meet the relevant requirements of food safety. The pretreatment agent uses a non-toxic food-grade trivalent chromating agent, which is imported from Germany and is a surface treatment agent specifically used for food metal coatings.

The resin used in the coating is imported from the United States 1009 epoxy resin. The coating produced by this resin has passed the US FDA certification and can be used for surface coating of food metal packaging. There are also strict requirements for the There are also strict requirements for the aluminum sheet, requiring the toxic element content in the substrate to be Pb<0.01%, Cd<0.01%., As<0.01%. In production, a special assembly line is required to prevent mutual contamination between the production of industrial coated aluminum coils and the production of food packaging colored aluminum coils.

At present, the upstream and downstream industries of color-coated aluminum sheets and strips for food packaging in China tend to be stable, and the process technology and equipment manufacturing are basically mature. Haomei Aluminum has been devoted to provide better stable quality and better price. Welcome to inquire aluminium colour coated sheet price from us.

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