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The possibility of water transfer printing applied to food
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The possibility of water transfer printing applied to food

Author: Site Editor     Publish Time: 2021-05-08      Origin: Site

The possibility of water transfer printing applied to food

Water transfer printing is mainly used in food packaging, and food labels (labels) must have a certain strength and resistance to make water-soluble materials adhere to them, such as carbon atom C. The application of water transfer printing on vegetables is mainly aimed at the use of high-end brand vegetables, especially fruits and vegetables. The principle is the same as that of fruit water transfer printing. Vegetables have a lot of water. There are some existing methods of labeling on their surfaces, but after a long time the water seeps out, the label will fall off, and the required effect will not be achieved, and water transfer printing will not cause the problem of label falling off. It is very reliable within the normal breathing range of vegetables. The application of water transfer printing on processed food mainly uses the characteristics of water transfer printing of water-soluble materials. Most of the most advanced water-soluble materials are water-soluble plastic films, mainly made of polyvinyl alcohol. It has very good barrier properties after film formation and drying. It is convenient to print pictures and texts on water-soluble materials. The characteristics of the second layer of water-soluble material. This material is a carrier for printing graphics and text. It is required to be effectively combined with the first layer and easy to peel off under the action of water. The third layer of printing ink characteristics.


All information materials to be transferred should have sufficient adhesion to the second layer. The core of water transfer printing-water-soluble materials have good safety. The key material for water transfer printing is water-soluble material, that is, water-soluble plastic film. Its basic ingredient is polyvinyl alcohol, which has good safety ingredients and prevents migration and penetration. Research experiments have shown that the dissolved products of water-soluble plastic films are hydrogen atoms, oxygen atoms and carbon atoms, which have no side effects on the environment and the human body (see Table 2); in addition, water-soluble plastic films have good barrier properties below 70°C. It can prevent the migration and penetration of various chemical components and harmful gases into the food. It can be seen that water transfer printing has no side effects on food safety, and certain ingredients are also conducive to food preservation and food surface decoration. Especially for food labels (labels), the current practice is to use adhesives to stick printed plastic labels and paper labels on the surface of the food. This method is because the adhesive and ink may migrate and penetrate into the food. Therefore, as time goes by and temperature rises, it will inevitably lead to food safety problems. Water transfer printing has good safety for food labels (labels). Analyzing the principles and characteristics of water transfer printing, water transfer printing applied to food has the following advantages. Material characteristics refer to the performance characteristics of the water transfer structure of each layer. Take the four-layer material in Figure 1 as an example for analysis. The characteristics of the first layer of transfer paper (or film), therefore, after printing on it, after the printed image and text are fixed on the surface of the water-soluble material, the ink is difficult to penetrate into the food. Generally, water transfer printing can be applied to the sealing label of a single food inner packaging. Water transfer printing has unique characteristics and performance. Using these properties can make water transfer printing play new uses on food. The key to food applications is to choose the safety of printing inks.

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