The corrosion resistance of canned food containers is further strengthened

National Standard "General Quality Rules for Film-coated Iron and Film-coated Aluminum for Food Containers" Released

The corrosion resistance of canned food containers is further strengthened

In April this year, the State Administration of Market Supervision and Administration (National Standardization Administration) approved 353 national standards including the Gravimetric Method for the Determination of Silicon Content in Iron and Steel and Alloys and 4 national standard amendments. The four national standards including the General Rules for the Quality of Film-coated Iron and Film-coated Aluminum for Food Containers, which were organized and revised by the National Food Industry Standardization Technical Committee, will be formally implemented on November 1.

What is the food container with coated iron, coated aluminum, the release of the relevant standards for the canned industry, what is the significance of the enterprise?

"General Principles for the Quality of Film-coated Iron and Film-coated Aluminum for Food Containers" clearly states that film-coated iron is a composite material with dual properties of polymer materials and metal materials, which is formed by laminating a layer of polymer film on the surface of thin steel plates such as tin plating or chromium plating by melting method and adhesive method. Coated aluminum is a kind of composite material with dual properties of polymer material and metal material, which is formed by laminating a layer of polymer film on the surface of aluminum alloy sheet by melting method, adhesive method and other methods.

The coated iron cans and coated aluminum cans made of coated iron and coated aluminum materials can be used for the packaging of milk powder, cans, beverages and other foods. In daily life, metal packaging is not very important, but it has always played an important role in the packaging industry. From tinplate (tinplate), chrome-plated iron (TFS) to coated iron, and then to coated iron, metal packaging on the market continues to develop with the improvement of science and technology. The "Annual Operation Report of China's Metal Packaging Industry (2023)" released by the China Packaging Federation shows that in 2023, there were 928 enterprises above designated size in my country's metal packaging industry (all industrial legal persons with annual operating income of 20 million yuan and above), compared with last year An increase of 64. The total profit of the national metal packaging industry totaled 7.172 billion billion yuan, an increase of 25.47 percent over the same period last year, and the growth rate increased by 22.12 percentage points over the same period last year.

As a listed company in the field of metal packaging and the first domestic enterprise to start the independent research and development of heat-coated film-coated iron, Orijin Technology Co., Ltd. pointed out in its 2023 annual report that at present, metal packaging has formed a relatively perfect metal packaging industrial system including film-coated, printing and coating, can-making, lid-making and other links. The main products can be divided into three-piece cans and two-piece cans.

The reporter noticed that in the "General Principles for the Quality of Film-coated Iron and Film-coated Aluminum for Food Containers", the physical and chemical indicators put forward requirements on cooking resistance, acid resistance, sulfur resistance, salt resistance, corrosion resistance, impact resistance, adhesion, etc. Taking corrosion resistance as an example, after relevant tests, the corrosion resistance meets the requirements of level 1 (less than 10 corrosion spots with a length of less than or equal to 1mm; When less than 5 corrosion spots with a length of 1mm-2mm), the coated iron can meet the requirements of corrosion resistance in practical application. It is not difficult to see that the advantages of coated iron and coated aluminum in processing resistance and corrosion resistance.

Liu Youqian, chairman of the China Canned Food Industry Association, said in an interview with reporters that the earliest packaging materials for canned food are metal materials. At the same time, metal packaging occupies an important position in the current canning industry. The new material of coated iron has been successfully developed to fill the domestic gap. Become the first choice for canned food packaging. The formulation and release of this standard solves the problem of the lack of standards for coated iron and coated aluminum in China, standardizes the industry terminology, unifies the quality requirements, and plays an important role in the high-quality development of the domestic coated iron industry. At the same time, the formulation of the standard is of great significance to improve the construction of the standard system in the field of canning, to standardize product production and improve product quality. In the future, in order to make the film coated iron recognized by consumers, on the one hand, it needs the efforts of the dominant enterprises in the industry such as Orijin, on the other hand, it also needs the joint blessing of the whole industry.