Analyze the development status of screen printing high temperature resistant glass ink

High temperature glass ink is mainly composed of pigments, co-solvents of low melting point glass powder and toner. Among them, pigments are pyrolysis products, and the firing temperature of at least 600 degrees Celsius must be guaranteed. Pigment, as the main material of color development, plays a decisive role in the quality and printability of high temperature glass ink.

Inorganic screen printing high-temperature glass ink has two kinds of inks, one is that the inorganic pigment is ground to a certain fineness, and then acrylate is added. The screen printing is on the glass surface, and the tape is calcined at high temperature for 1-2min. The ink layer and the glass surface are melted together. The fastness is excellent. The heat-resistant temperature of this high-temperature glass ink is above 600 degrees Celsius, but because the screen printing process is expensive and the process is complex, it is rarely used in the screen printing industry; The other is an inorganic glass ink with polymer compounds as binders. Both amino and epoxy types need to be baked. The high-temperature glass ink widely used in the domestic market is after screen printing Baking at 1300-1400 degrees Celsius for 30 minutes, the heat-resistant temperature of this ink is relatively low, but the baking time is longer, and the fastness and hardness of the ink are good. The brightness is also very good, and it can withstand the corrosion of low-concentration electrolytes and solvents such as ethanol, acetone, benzene, and cycloacetone.

Existing high-temperature glass inks, as well as high-temperature ink on ceramics, have a relatively high temperature resistance above 600 degrees Celsius, or even above 1000 degrees Celsius. On some glass containers, the heat-resistant temperature of the ink is sometimes lower than that on ceramics, such as 180-200 degrees Celsius. This 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, and is used to decorate glass. Bake at 200 degrees Celsius for 10 minutes.

Among the existing high-temperature resistant glass inks, there are relatively few inks with 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, but there are also relatively few foreign manufacturers, and the heat resistance of the inks produced is not very stable. For example, the printing wheel label must be baked at a temperature of 200 degrees Celsius for 3 hours after printing. The phenomenon of discoloration often occurs. The cost of the ink that can meet the requirements in the application is relatively high. At present, some countries with developed screen printing industry have developed inks, and the price of finished products is relatively high, so this ink has high use value and can replace similar imported inks, reducing the printing cost of product production.