Selection of inks for flexible packaging of liquid milk and milk beverages

Milk film is currently used in large-scale surface printing process, color printing manufacturers cut into a roll for various specifications according to the specifications for the dairy manufacturers to use, the film print directly inside the film heat seal film, ink layer of solvent residues, ink pigments The anti-migration performance and the heavy metal content of the pigment have a very direct influence on the flavor and hygiene of the dairy product. How to improve the hygienic properties of the milk film ink is a social responsibility and obligation that domestic color printing and ink manufacturers must undertake.

Milk (beverage) film is a new product rapidly developed in domestic flexible packaging products in recent years. The five types of products discussed above are commonly used milk (beverage) films in China, and are more suitable for the actual demand of China's liquid dairy products consumer market. , can partially replace the high production cost of paper aluminum plastic composite materials, packaging developed Europe and the United States are less used this type of product for liquid milk packaging. Due to the complexity of food processing and the limitation of packaging cost, it is difficult for color printing manufacturers to use a certain type of ink to satisfy various customers' various liquid milk (beverage) processing technologies. Only targeted ink selection can be achieved. The best price-performance ratio.

In summary, due to the diversity of packaging technology for liquid milk (milk beverages), it is difficult for color printing plants to select inks, and thus there are also many quality problems. Generally, single-component inks are difficult to adapt to various filling process packaging requirements. . After many years of market application, Zhejiang New Oriental Ink Group has introduced to customers the Chaolifu 314 (901) cooking resistant table printing ink that can meet the requirements of diverse process packaging. The ink has the following advantages:

1、Two-liquid broad-spectrum type: With 8% ink hardener, the reaction speed is gentle at room temperature, continuous use can reach more than 24 hours, less ink waste, resistant to cooking, good water resistance, ink layer smooth, anti rub, Anti-adhesion.

2, for a variety of PE, NY co-extruded film printing, printed matter must be matured at 50 °C for more than 12 hours, suitable for film hot and cold filling technology, resistant to hydrogen peroxide.

It should be noted that when the ink is currently used by some customers in Guangdong, Guangxi, and other regions, the printed matter is not placed in the curing room, but is directly placed in the workshop for more than 24 hours, and it can also meet the sterilization requirements for beverage packaging. This does not mean that manufacturers in all regions can adapt. Because the temperatures in Guangdong and Guangxi are relatively high, our company still insists that all printed products must be cooked in a maturation chamber at a 50-degree condition for more than 12 hours before they can be used to ensure that the products are perfectly safe.