What are the different standards for aluminum foil used in food packaging and industrial packaging?

2026-03-20 14:00:22

Aluminum foil is a versatile thin metal material widely used in food packaging and industrial packaging fields, thanks to its excellent barrier properties, mechanical strength, and processability. However, food packaging aluminum foil and industrial packaging aluminum foil serve completely different functional purposes and face distinct application environments, leading to significant differences in their industry standards and technical requirements. Food packaging aluminum foil is directly or indirectly in contact with food, so its standards focus on safety and hygiene to protect consumer health. Industrial packaging aluminum foil is mainly used to protect industrial products, equipment, or pipelines, so its standards emphasize durability, corrosion resistance, and mechanical performance. This article focuses on the core differences between the standards for food packaging aluminum foil and industrial packaging aluminum foil, details the specific requirements of international and domestic standards, analyzes the reasons for these differences, and provides a comprehensive reference for industry practitioners while meeting SEO optimization needs.

The most fundamental difference between the two sets of standards lies in their core positioning and guiding principles. The standards for food packaging aluminum foil are formulated based on the core goal of ensuring food safety, with strict restrictions on harmful substances, migration performance, and hygiene indicators. Every requirement is designed to prevent aluminum foil from polluting food during use. In contrast, the standards for industrial packaging aluminum foil are formulated to meet the needs of industrial production and product protection, focusing on the material’s mechanical strength, corrosion resistance, dimensional accuracy, and barrier performance in harsh industrial environments. These differences in core positioning determine the divergence in specific technical indicators of the two types of standards.

In terms of safety and hygiene standards, food packaging aluminum foil has extremely strict requirements, which are not involved in the standards for industrial packaging aluminum foil. Internationally, the European Union has issued the latest technical guide “Metals and Alloys used in food contact materials and articles 2024”, which updates the specific release limits (SRLs) of metal elements and adjusts the migration test methods, requiring that the migration amount of harmful elements in food contact aluminum foil must meet strict limits. For disposable products, the first migration amount should not exceed the SRLs; for reusable products, the third migration amount should not exceed the SRLs, and the sum of the first and second migration amounts should not exceed 7 times the SRLs.

In China, the core standard for food packaging aluminum foil is GB 4086.9-2023 “National Food Safety Standard for Metal Materials and Products for Food Contact”, which clearly stipulates the limits of harmful impurities and element migration. The content of lead, arsenic, and cadmium in food-contact aluminum foil should be less than 0.01%, and the total content of lead, mercury, cadmium, and hexavalent chromium should not exceed 100ppm, while the aluminum content should not be less than 98%. Kenya’s new standard DKS 2294:2024 for household aluminum foil, which covers food use, also has similar requirements for harmful elements. In addition, food packaging aluminum foil must pass migration tests in accordance with GB 31604.1-2023 “National Food Safety Standard General Rules for Migration Tests of Food Contact Materials and Products” to ensure that no toxic or harmful substances migrate into food under normal use conditions, including high-temperature or acidic environments.

Industrial packaging aluminum foil has no such strict safety and hygiene requirements, as it does not come into contact with food or human bodies directly. Its standards focus more on performance indicators related to product protection. For example, GB/T 22648-2023 “Aluminium foils used for aluminium-plastic composite tube and packaging pouch of battery” in China specifies the technical requirements for aluminum foil used in industrial scenarios such as aluminum-plastic composite hoses and battery soft packs, focusing on mechanical performance and dimensional accuracy rather than hygiene indicators. Industrial aluminum foil may contain certain impurities that do not affect its protective performance, and there is no requirement for element migration, as it will not come into contact with food or human bodies during use.

Mechanical performance standards are another key difference between the two. Food packaging aluminum foil requires moderate mechanical strength, focusing on flexibility and ease of processing, while industrial packaging aluminum foil requires higher tensile strength, tear resistance, and wear resistance to adapt to harsh industrial environments. For food packaging aluminum foil, the tensile strength is usually required to be between 60MPa and 110MPa, and the elongation is not less than 3%, which is sufficient for packaging processes such as wrapping, folding, and sealing. Kenya’s DKS 2294:2024 standard also specifies that the tensile breaking load of food-use aluminum foil should be within the range of 60-110MPa, ensuring it is easy to use while not being easily torn.

In contrast, industrial packaging aluminum foil, especially those used in pipeline insulation, equipment packaging, and battery soft packs, has higher mechanical performance requirements. Its tensile strength is generally between 70MPa and 120MPa, and the elongation is not less than 4%, ensuring it can withstand mechanical stresses such as pulling, squeezing, and friction during transportation and use. For example, aluminum foil used in industrial pipelines needs to maintain structural integrity when wrapped around pipelines, while aluminum foil used in battery soft packs needs to have sufficient tear resistance to prevent damage during battery assembly and use. These requirements are not required for food packaging aluminum foil, which only needs to meet the needs of daily packaging operations.

Dimensional accuracy and surface quality standards also differ significantly between the two. Food packaging aluminum foil has relatively loose requirements for dimensional accuracy, while industrial packaging aluminum foil requires strict control of thickness, width, and length to ensure its protective effect and processing performance. For food packaging aluminum foil, the thickness is usually between 0.01mm and 0.05mm, and the thickness tolerance can reach ±0.005mm. Kenya’s DKS 2294:2024 standard specifies that the thickness of food-use aluminum foil should be in the range of 10-20 microns, and the minimum size should not be less than 30 centimeters × 5 meters. The surface of food packaging aluminum foil only needs to be free of obvious defects such as large pinholes and oil stains, and a small number of minor scratches or pinholes will not affect its use.

Industrial packaging aluminum foil has extremely strict requirements for dimensional accuracy. The thickness tolerance is usually no more than ±0.002mm to ensure uniform performance of the entire foil surface. For example, aluminum foil used in industrial pipelines has a thickness range of 0.03mm to 0.2mm, and the dimensional error between adjacent foil sheets should not exceed 1mm. In terms of surface quality, industrial packaging aluminum foil requires a smooth and clean surface, free of pinholes, scratches, oxidation spots, or metal debris. The number of pinholes is usually required to be no more than 10 per square meter, because pinholes will reduce the barrier performance and mechanical strength of the aluminum foil, affecting its ability to protect industrial products. In addition, industrial aluminum foil often requires special surface treatment to enhance its corrosion resistance and adhesion, which is not required for most food packaging aluminum foil.

Barrier performance standards also have obvious differences, which are determined by the different protective needs of the two types of packaging. Food packaging aluminum foil focuses on barrier performance against moisture, oxygen, and light to extend the shelf life of food. Its water vapor transmission rate (WVTR) is usually required to be less than 0.1 g/(m²·24h), and the oxygen transmission rate (OTR) should be close to zero to prevent food spoilage and oxidative deterioration. For light-sensitive foods such as medicines and vitamins, food packaging aluminum foil also needs to have good light barrier performance to block visible light and ultraviolet radiation.

Industrial packaging aluminum foil’s barrier performance requirements vary according to specific application scenarios. For example, aluminum foil used in pipeline insulation focuses on heat insulation and moisture resistance, while aluminum foil used in electronic product packaging focuses on electromagnetic shielding and moisture resistance. The barrier performance indicators of industrial aluminum foil are formulated according to the characteristics of the protected products, and there is no unified standard like food packaging aluminum foil. Some industrial aluminum foil needs to have good barrier performance against chemical media, while others only need basic moisture-proof performance, which is quite different from the relatively unified barrier requirements of food packaging aluminum foil.

Labeling and packaging standards are also important differences between the two. Food packaging aluminum foil has strict labeling requirements to ensure consumer safety. According to Kenya’s DKS 2294:2024 standard, food-use aluminum foil should be clearly and indelibly marked with the manufacturer’s name or trademark, manufacturer or importer’s address, country of origin, usage instructions such as “Do not use for microwave heating of meat”, disposal instructions, and product size. In China, food packaging aluminum foil must be marked with the “food contact” logo, and the execution standard number (such as GB 4086.9-2023) must be indicated. If a manufacturer uses an enterprise standard (starting with Q), the standard requirements must not be lower than the mandatory national standards.

Industrial packaging aluminum foil has relatively simple labeling requirements, usually only needing to indicate the product name, specification, manufacturer, and production date. There is no requirement for special logos such as “food contact”, and the labeling content is mainly for the convenience of production, transportation, and use. In addition, the packaging of food packaging aluminum foil must be clean and free of pollution, and each package should contain only a single size of aluminum foil. The packaging of industrial aluminum foil is more focused on protecting the aluminum foil itself from damage during transportation and storage, and there is no strict requirement on the single size of each package.

The differences in standards between food packaging aluminum foil and industrial packaging aluminum foil are essentially determined by their application scenarios and functional positioning. Food packaging aluminum foil is closely related to consumer health, so safety and hygiene are the core of its standards. Industrial packaging aluminum foil is mainly used to protect industrial products, so performance indicators such as mechanical strength, corrosion resistance, and dimensional accuracy are the focus. It is worth noting that the two types of aluminum foil cannot be used interchangeably. Using industrial aluminum foil instead of food packaging aluminum foil will lead to potential food safety hazards, as industrial aluminum foil may contain harmful impurities that can migrate into food. Using food packaging aluminum foil instead of industrial packaging aluminum foil will result in insufficient protection performance, leading to damage to industrial products during transportation and use.

With the continuous development of the packaging industry and the improvement of safety and environmental protection standards, the standards for food packaging aluminum foil and industrial packaging aluminum foil are also constantly optimized. For food packaging aluminum foil, countries around the world are constantly updating the limits of harmful elements and migration indicators to further improve food safety. For example, the European Union’s 2024 technical guide updates the specific release limits of metal elements and adjusts the migration test methods to make the standards more scientific and strict. For industrial packaging aluminum foil, with the development of new industries such as new energy and aerospace, the standards are also moving towards higher performance and more refinement, such as higher dimensional accuracy and better corrosion resistance.

Industry data shows that the global aluminum foil output is growing steadily, with China’s aluminum foil output reaching 5.4 million tons in 2024, of which a considerable proportion is used in food packaging and industrial packaging. The market demand for food packaging aluminum foil is driven by the growth of the food industry and the increasing consumer demand for food safety, while the demand for industrial packaging aluminum foil is growing with the acceleration of industrial infrastructure construction and the upgrading of new energy industries. The continuous improvement of standards will promote the healthy development of the aluminum foil industry and ensure the quality and safety of products in various fields.

In conclusion, there are significant differences between the standards for food packaging aluminum foil and industrial packaging aluminum foil, mainly reflected in safety and hygiene, mechanical performance, dimensional accuracy, surface quality, barrier performance, and labeling and packaging. These differences are the result of their different core positioning and application needs. Food packaging aluminum foil standards focus on safety and hygiene to protect consumer health, while industrial packaging aluminum foil standards focus on performance indicators to ensure the protective effect on industrial products. Understanding these standard differences is crucial for manufacturers to produce qualified products and for users to select appropriate aluminum foil, avoiding improper use and potential risks.

Whether in the food industry that relies on food packaging aluminum foil to ensure food safety, or in the industrial field that uses industrial packaging aluminum foil to protect products, the implementation of corresponding standards is the key to ensuring product quality and stable operation. With the continuous advancement of technology and the improvement of industry standards, aluminum foil will continue to play an important role in both fields, providing more reliable packaging solutions for various industries.