Aluminum foil is a high-grade packaging materials, can replace a large area of Dian Hualv bronzing, hot silver, printed products magnificent, not only improve the grade of packaged goods, and improve the packaging of goods display value, widely used in high-end goods Trademarks and packaging. Aluminum foil in the field of food and medicine and other packaging is also widely used, aluminum foil and plastic film composite, the effective use of high temperature cooking and completely shading characteristics, made of cooking bags, can be packaged cooking food, multi-layer composite film also For small biscuits, snacks, beverages and other small food packaging.
In recent years, aluminum foil packaging applications continue to expand, in addition to drug packaging, food packaging, health care products, packaging and other applications, to promote China's aluminum foil printing technology continues to improve, and now to aluminum foil on both sides can be printed on both sides. Not only can print a color of the product, but also printed into colorful multi-color patterns of color patterns, aluminum foil surface coated with imitation gold foil and other colors are displayed in front of consumers, so that the packaging form makes people feel noble Gorgeous, put it down, played a good publicity to protect the role of the product. In the case of
The characteristics and production of aluminum foil
Aluminum foil is characterized by: metallic luster, good light, good heat and light reflection ability, metallic luster and reflective ability can improve the brightness of printed color; good isolation, strong protection, impermeable gas and water vapor, To prevent the contents of moisture absorption, gasification, not susceptible to bacterial and insect damage; shape stability, and is not affected by changes in humidity. Easy to process, can be printed on the aluminum foil, the difference, embossing, surface coating, glue on the paint; can not force, no sealing, pinhole and easy wrinkles and so on, so under normal circumstances not alone Use, usually with paper, plastic film processing into composite materials, to overcome the shortcomings of non-sealing, isolation and other advantages have also been fully play.
Aluminum foil production refers to the whole process from the beginning of the aluminum foil to the processing of the foil, which is a continuation of the cold rolling process of the aluminum strip. Aluminum foil blanks are hot-rolled billet and casting billet two, cold rolled into a thickness of 0.4-0.7mm aluminum foil wool, and then by rough rolling, rolling and finishing to obtain different thickness of aluminum foil. The specific process of producing aluminum foil is based on the type of alloy produced by the product, 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 to determine. The overall production process for aluminum foil (thickness 0.0065mm-0.007mm) for flexible packaging is: aluminum ingot smelting - casting rolling - cold rolling - intermediate annealing - cold rolling - aluminum foil wool - In the rolling - finishing (double) - cutting - finished annealing - packaging.
Aluminum foil printing
Aluminum foil printing can be used for letterpress printing, gravure printing and flexographic printing. Toppan printing is suitable for small batch printing, gravure printing and flexographic printing for large quantities of roll paper printing. The printing process to take the following measures: the need for greater printing pressure. Aluminum foil has a strong barrier, poor absorbency, pressure to make the plate and aluminum foil surface with the largest area of contact and forced ink adhesion. Requires strong adhesion of ink, drying speed, fast. Can be used printing ink, resin-type offset fast ink or offset printing and plastic ink mixed ink. Ink generally need to add driers to improve the drying rate, such as gravure printing must be installed hot air drying device. Select the ink on the machine must first play a sample, to detect the hue, drying, etc. meet the requirements.
In the current packaging substrate, aluminum foil barrier is the best, aluminum foil is a high-grade printing and packaging materials, aluminum foil printing in recent years has been gravure industry is an important branch. Aluminum foil in the packaging of the application is mainly used for trademarks and some high-end food packaging such as beer tops, chocolate packaging, etc., and paper, plastic, aluminum foil is thin, crisp, easy to wrinkle the characteristics of the printing process There are some problems.