With the development of technology, metals are gradually involved in the research and development of packaging materials, especially aluminum foil packaging. The aluminum foil has excellent advantages such as moisture-proof, airtight, oil-proof, fragrance-preserving, light-shielding, and non-toxic. Compounding it with traditional packaging materials can improve the comprehensive performance of composite materials. In traditional block butter packaging, wrap aluminum foil is widely used.
Food-grade aluminum foil is a common food packaging material, widely used in food processing, cooking and storage. In order to ensure the safety and reliability of food wrapping aluminum foil, strict quality inspection is required before it is sold out of the factory. What are these testing indicators?
Food aluminum foil needs to have certain physical properties during use to ensure the integrity and preservation of the packaging. Common physical performance indicators include thickness, tensile strength, tensile elongation and elongation at break. Thickness determines the softness and protective properties of aluminum foil, while tensile strength and elongation reflect the durability and strength of aluminum foil.
When food aluminum foil comes into contact with food, it is necessary to ensure that it will not have a negative impact on the quality of the food. Therefore, the quality inspection report should include the test results of chemical indicators.
Common chemical indicators include aluminum content, heavy metal content, organic solvent residues and volatile substances. The aluminum content is directly related to the exposure of food in aluminum foil. Aluminum content exceeding the limit may have an impact on human health. The detection of heavy metal content such as lead and mercury is to ensure that the aluminum foil is not contaminated by environmental pollutants.
Food aluminum foil usually needs to be surface treated during the production process to improve its corrosion resistance and appearance quality. The quality inspection report should include the test results of surface treatment indicators, such as oxide film thickness, surface roughness and corrosion resistance.
The oxide film thickness can reflect the uniformity and quality of the oxidation treatment, the surface roughness is related to the glossiness and packaging effect of the aluminum foil, and the corrosion resistance can ensure that the aluminum foil will not dissolve or corrode during food contact.
In addition to the above-mentioned physical properties and chemical indicators, the quality inspection report of food-grade aluminum foil should also include the test results of some packaging performance indicators. Packaging performance indicators are important criteria for measuring the quality of aluminum foil packaging, including damage resistance, closure and high temperature resistance. Damage resistance refers to the resistance of aluminum foil to tearing, scratching and perforation during packaging and use. Closure evaluates the sealing performance of aluminum foil packaging containers to ensure the freshness and anti-corrosion of food. High temperature resistance refers to the stability of aluminum foil under high temperature conditions. Haomei food aluminium packaging completely meets these regulations. Welcome to leave message below to tell us what you need.