Application overview of aluminum for the hottest p

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Summary of the application of aluminum for packaging

March 16 aluminum is a metal second only to the output of steel, but the history of aluminum used as packaging material is only more than 30 years. In recent years, aluminum is used more and more in packaging, because it has a series of excellent properties. Its density is small, only 1/3 of that of steel, and its weight is light; It has excellent processability, and it is easy for many pages to be pressed into various complex shapes in content; It has strong corrosion resistance and will not rust; Excellent barrier, shading and fragrance retention, which can effectively protect products; High thermal conductivity, easy to sterilize aluminum cans; It is silvery white, beautiful in color, and has large reflectivity to light, which is easy to print and has good printing effect; It is non-toxic and tasteless, and will not bring peculiar smell to the inner food due to the escape of aluminum ions; Waste aluminum containers can be recycled and remelted without environmental pollution. Its main disadvantages are: soft material, low strength, easy to deform when impacted; The welding performance is poor, and the joint cannot be welded. The load range of static load unit is 5 ⑴ 00 n; The corrosion resistance to acid and alkali is poor, so it is not suitable to contain fruit food; The cost is higher

aluminum packaging materials mainly include pure aluminum plate, alloy aluminum plate and aluminum foil

(1) pure aluminum plate and alloy aluminum plate

pure aluminum plate contains 99.9% aluminum, which is tested by our spring testing machine in strict accordance with Japan "The thickness of the standard for displacement detection is generally between 0.25~0.3mm. It is soft and low strength, so it is less used as packaging material, but it is also used as wine container.

alloy aluminum plate is processed by adding a small amount of magnesium, manganese and copper to aluminum. The commonly used aluminum alloys on the packaging are aluminum magnesium alloy and aluminum manganese alloy, also known as antirust aluminum alloy. The strength and hardness of alloy aluminum plate are significantly improved, and the corrosion resistance Strong, good polishing, long-term preservation, the appearance still remains bright

alloy aluminum plates are mostly used in the manufacture of canned containers. When used in canned fish and meat, they will not produce vulcanization and blackening like tinned cans; More importantly, packaged drinks will not make drinks muddy and flavor changes

(2) aluminum foil

aluminum foil is calendered from pure aluminum with purity of more than 99.5%, and the thickness is between 0.005~0.2mm. It is light and glossy, with strong reflection ability, and can be used as heat proof and insulating packaging; Good barrier, impervious to gas and water vapor; Easy to process, easy to process into various shapes; Convenient for printing, gluing, painting, coloring, embossing, printing, etc; Strong adaptability to temperature, stable shape at high or low temperature; Excellent shading and fragrance retention. The biggest disadvantage of aluminum foil is that it is not resistant to acid and strong alkali, cannot be welded, and has low tear strength

aluminum foil is widely used in packaging, which can pack items separately; Most of them are made into composite materials with paper, plastic film, etc., which are used for the packaging of food, cigarettes, cosmetics, drugs, chemicals, etc., and can be made into cooking bags, packaging convenience food and cooking food, etc

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