The vigorous development of high temperature glass ink

The vigorous development of screen printing has accelerated the development of various new types of screen printing high-temperature glass inks, such as fragrance, fluorescence, foaming, and quick-drying inks. These inks are generally dried at room temperature, and only glass printing and ceramics are dried at high temperatures. Dry at high temperatures, so high temperature resistant glass inks often refer to inks used for glass and ceramic printing.

High temperature resistant glass ink According to different substrate materials and different printing processes, the required heat resistant temperature is also different.

Inorganic glass screen printing has two kinds of high temperature glass inks, namely:

(1) After the inorganic pigment is ground to a certain fineness, acrylate is added, and it is screen printed on the glass surface. It needs to be calcined at high temperature for 1-2 minutes. The ink layer and the glass surface are melted together with excellent fastness. The heat-resistant temperature of this high-temperature glass ink is above 600 degrees Celsius. However, because this screen printing process is expensive and complicated, it is rarely used in the screen printing industry.

(2) Inorganic high-temperature glass inks using off-molecular compounds as binders, amino and epoxy types all need to be baked. The ink widely used in the domestic market is baked at 130 degrees Celsius to 140 degrees Celsius for half an hour after screen printing, and the heat-resistant temperature of this ink is relatively low. However, the baking time is long, the fastness and hardness of the ink are good, the brightness is also very good, and it is resistant to low-concentration electrolytes and solvents such as ethanol, acetone, benzene, and cyclohexanone. Corrosion.

The printing temperature of ceramics can be divided into two types according to the firing method, namely: one is to burn it plain at a temperature of 700-800 degrees Celsius, then glaze it after burning it plain, and then burn it at a temperature of 1100-1300 degrees Celsius. This firing method uses the heat resistance temperature of the ink to reach 1100-1300 degrees Celsius; the other is to burn it at 1100-1250 degrees Celsius first, then glaze it, and then burn it at a temperature of 900-1000 degrees Celsius. This high-temperature glass ink requires a lower heat resistance temperature than the previous one, which is 900-1000 degrees Celsius.

Existing high temperature resistant inks used in ceramics and glass have a high temperature resistance of more than 600 degrees Celsius, or even more than 1,000 degrees Celsius. Printed on some glass containers, sometimes the heat-resistant temperature of the ink is higher than that used on ceramics, such as 180-200 degrees Celsius. This kind of ink is also called low-temperature glass ink. It is made of organic coatings and organic pigments or imitation gold pigments instead of inorganic pigments and pure gold. It is used to decorate glass and baked at 200 degrees Celsius for ten minutes.

Among the existing high-temperature resistant glass inks, few have a heat-resistant temperature of 1800-2000 degrees Celsius. If they are required to bake at this temperature for a long time, there are even fewer inks that can meet this requirement. At present, there are almost no inks that can bake at a temperature of about 200 degrees Celsius without changing color in China, mainly imported.

However, there are relatively few high-temperature glass ink manufacturers produced abroad, and the heat resistance of the ink produced is not very stable. For example, when printing grinding wheel labels, it is necessary to bake at a temperature of 200 degrees Celsius for three hours after printing, and discoloration often occurs. The cost of high-temperature glass ink that can meet the requirements is relatively high.