Types of high-temperature resistant glass screen printing inks

The vigorous development of screen printing has led to the rapid development of various new types of screen printing inks, such as scented inks, fluorescent inks, foaming inks, and quick-setting inks. These inks are generally dried at room temperature. Glass printing and ceramic printing are dried at high temperatures. Therefore, high temperature resistant inks are often used for glass and ceramic printing inks. According to different substrates and different printing processes, high temperature resistant inks require different heat resistance temperatures.

Inorganic glass screen printing with two kinds of ink, one kind is the inorganic pigment after grinding, to a certain degree of fineness, then add acrylate, screen printing on the glass surface, need to be high temperature (600 °C above) roast 1 ~ 2 min, ink layer Melted together with the glass surface, excellent fastness. The heat-resistant temperature of this ink is above 600 °C. However, because this screen printing process is costly and the process is more complicated, it is rarely used in the screen printing industry.

The other type is inorganic glass ink with macromolecular compound as binder. Both amino type and epoxy type are required to be baked. The ink widely used in the domestic market is baked at 1 300 ~ 1 400 °C for 30 minutes after screen printing. The heat-resistant temperature of the ink is relatively low, but the baking time is longer, the ink has good fastness and hardness, the brightness is also very good, can withstand low concentrations of electrolytes and solvents such as ethanol, acetone, benzenes, cyclohexanone, etc. Corrosion.

The printing temperature of ceramics can be divided into two kinds according to the firing method: one is to burn at 700 ~ 800 °C at first, then glaze after baking, then burn at 1 100 ~ 1 300 °C. system. The heat-resisting temperature of the ink used in this firing method is required to reach 1100 ~ 1 300 °C; the other is to burn at a high temperature of 1 100 ~ 1 250 °C, and then glazed with 900 ~ 1 000 °C. The temperature is fired. The heat-resisting temperature required for this type of ink is lower than the former, reaching 900 to 1 000 °C.

The existing high temperature resistant inks used in ceramics and glass have high temperature resistance at temperatures above 600 °C and even above 1 000 °C. In some glass containers, the heat resistance temperature of the ink is sometimes lower than that of ceramics, such as 180 ~ 200 °C. This kind of ink is also called low-temperature glass ink. It uses organic paint and organic pigment or imitation gold to replace inorganic pigments. Made of pure gold, used to decorate glass and baked at 200 °C for 10 min.

In existing high-temperature inks, the heat-resistant temperature of 1 800 to 2 000 °C is relatively small. If it is required to bake at this temperature for a long time, there will be less ink to meet this requirement. At present, there are almost no inks that can withstand baking at 200 °C and do not change color, mainly relying on imports. However, the number of foreign manufacturers is also relatively low, and the heat resistance of the inks produced is not very stable, such as the printing wheel labels, which need to be printed. When it is willing to bake at 200 °C for 3 h, the phenomenon of discoloration often occurs. The cost of the ink used in the application is relatively high. At present, some screen printing industry developed countries have ink developed, the finished product price is relatively high, so this ink has a high value of use, can replace the same imported ink, reducing the printing cost of product production.