Aluminum foil packaging and printing knowledge

【China Aluminum Network】 Aluminum foil is a high-grade packaging material that can replace a large area of ​​aluminum foil stamping, hot silver, printing products magnificent, not only improves the quality of packaged goods, and improve the display value of packaged goods, Widely used in high-grade goods trademarks and packaging. Aluminum foil is also widely used in the food and pharmaceutical packaging industries. Aluminum foil and plastic film composites effectively use high-temperature cooking and complete shading. It can be used as a cooking bag to package cooked foods. Multi-layer composite films are also used. For biscuits, snacks, drinks and other small food packaging.

In recent years, the application scope of aluminum foil packaging has been expanding. In addition to pharmaceutical packaging, food packaging, health care product packaging, etc. have been applied, prompting the continuous improvement of aluminum foil printing technology in China. Now it can be printed on both sides of aluminum foil. Not only can print a color of the product, but also can be printed into a variety of multi-color colorful text patterns, the surface of the aluminum foil coated gold imitation gold foil and other colors are displayed in front of consumers, this packaging form makes people feel noble Gorgeous, put it down, played a good role in propaganda and protection of products.

Characteristics of aluminum foil and production of aluminum foil is characterized by: metal luster, good light protection, high heat and light reflection ability, metallic luster and reflection ability can improve the brightness of printing color; good insulation, strong protection, not Gas-permeable body and water vapor prevent the contents from absorbing moisture and gasification and is not easily invaded by bacteria and insects. The shape has good stability and is not affected by changes in humidity. Easy to process, can be printed on aluminum foil, color difference, embossing, surface coating, gluing, etc.; can not be forced, no sealing properties, pinholes and wrinkles, etc., so under normal circumstances not alone Use, usually with paper, plastic film processing into a composite material, to overcome the lack of sealing defects, insulation and other advantages have also been fully utilized.

Aluminum foil production refers to the whole process from the beginning of the aluminum foil wool to the processing of the plain foil. It is a continuation of the aluminum strip cold rolling process. The aluminum foil blanks include hot rolled blanks and cast rolled blanks, which are cold-rolled into aluminum foil with a thickness of 0.4-0.7 mm, and then obtained through different thicknesses of aluminum foils by rough rolling, intermediate rolling, and finish rolling. The specific production process of aluminum foil is determined based on the type of alloy produced, the specifications of the finished product, the product quality requirements, the amount of production, and the specifications of the production equipment, production capacity, and other factors. The overall production process flow of aluminum foil for flexible packaging (thickness 0.0065mm to 0.007mm) is: aluminum ingot smelting - casting - cold rolling - intermediate annealing - cold rolling - aluminum foil wool - rough rolling - Medium Rolling - Finishing (Double) - Slicing - Finished Annealing - Packaging.

Aluminum foil printing Aluminum foil printing can use letterpress printing, gravure printing and flexo printing. Toppan printing is suitable for small-lot printing, and gravure printing and flexo printing are suitable for large-volume roll paper printing. The following measures must be taken during the printing process: greater printing pressure is required. Aluminum foil has strong barrier properties and poor absorption. Pressure causes the surface of the printing plate and the aluminum foil to come in contact with each other and force the ink to adhere. Requires strong ink adhesion, drying speed, fast. Printing ink can be used, resin type offset printing fast fixing ink or offset printing ink and plastic ink. Ink is generally required to add driers to improve the drying speed, such as gravure printing must be installed hot air drying device. Before selecting the ink on the machine, you must first make a small sample to test whether the hue and dryness meet the requirements.

In the current packaging substrate, the barrier property of aluminum foil is better. Aluminum foil is a high-grade printing and packaging material. In recent years, aluminum foil printing has become an important branch of the gravure printing industry. The application of aluminum foil in packaging is mainly used for trademarks and some high-end food packaging such as beer top label, chocolate packaging, etc. Compared with paper and plastic, aluminum foil has the characteristics of thin, crisp, and easy to wrinkle, often in the printing process. There are some problems.

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