At present, in packaging and printing, environmentally friendly high temperature resistant (121 ℃ ~ 150 ℃) screen printing ink has become the focus of attention. The so-called environmentally friendly high-temperature screen printing ink is on the surface of the packaging product that has completed the graphic screen printing process, so that the printed graphic ink layer can adapt to the heat-resistant water-soluble ink layer, and has certain water resistance performance Environmentally friendly and decorative ink suitable for substrates. The screen printing of environmentally friendly high temperature resistant ink will not change its process due to environmental protection and high temperature resistance. However, it is characterized by dilution with pure water to adjust the ink, especially when the printed product is subjected to a certain high temperature, the ink film of the printing ink will improve its adhesion fastness, so that the ink film will not be softened due to the heat of the environment. Adhesion caused defective products or even scrapped. The products can be subjected to different screen printing processes according to user needs and actual printing process requirements. Therefore, here is a brief introduction to the product's formula design and application scope. Features of water-based high temperature resistant screen printing ink: Water-based high temperature resistant screen printing ink has non-toxic, odorless, organic solvent-free volatiles, low cost, wide source of materials, good gloss, precipitation resistance, heat resistance, wear resistance and water washing resistance, economic and sanitation, etc. Features. Water-based high temperature resistant screen printing ink can be divided into three types: high gloss, ordinary gloss, matt, etc. according to product use. It can be divided into two types from the screen technology: manual screen printing and rotary screen printing. During the use of water-based screen printing high temperature resistant ink, it can eliminate the harm to the human body and the pollution to the environment. It has begun to be valued by packaging and printing companies such as food, artificial leather, and luggage. In addition to environmental protection, screen printing high temperature resistant ink has the following advantages compared with solvent-based screen printing inks: 1. Heat-resistant and washable. The ink is usually resistant to 121 ℃ ~ 150 ℃, and provides an operable platform for some special packaging and printing products. In particular, inks in the past tend to cause back sticking or blocking and whitening due to an increase in ambient temperature or humidity. In particular, artificial leather products tend to make the ink film become soft, deformed, and migrate in the post-printing and other processes, resulting in the scrap of the product. The second reason is that the ink film is not resistant to washing during printing and dyeing, even during use, resulting in discoloration and discoloration. The environmentally friendly high-temperature screen printing ink is usually cured by high temperature, and the degree of branching of the graphic ink film is increased to enhance the water resistance of the product. 2. High transparency. The printed matter is bright and can be stored for a long time on the printed matter. Under strong sunlight, it is not easy to yellow, change color and fade. 3. Strong wear resistance. Packaging and printing jewelry needs a strong abrasion resistance, measured at 50 pressures per square centimeter, and it should generally reach 150 rubs per minute; the general gloss is 50 to 70 brightness units. Therefore, the packaged silk-screened product must not only be wear-resistant and resistant to 30 minutes`8d_? Clock wash, but also meet this requirement when it reaches 121 ° C to 150 ° C (3 seconds to 10 seconds). 4. The film-forming speed after printing is fast and drying is fast. The drying process of water-based high temperature resistant screen printing ink is 60% by evaporation or volatilization, 40% is absorbed by material penetration, and it dries quickly, and the graphic conjuncture of the printing ink can be completed in about several minutes or tens of minutes. If using infrared or hot air drying method, it can promote the film drying. 5. It is convenient and safe to use and store, which is conducive to safe production and improving the working conditions of the operating staff. Since solvent-based or oil-based screen printing inks belong to the category of dangerous goods, transportation, storage and use are quite inconvenient. The environmentally friendly high-temperature water-based screen printing ink uses water as a solvent without any danger. It is safe and reliable to use and can be used to clean equipment and fingers. 6. Non-toxic and tasteless. Since water-based screen printing ink uses water as a solvent and a small amount of volatile edible alcohol as an auxiliary solvent, it is particularly suitable for use on food, clothing, artificial leather and plastic substrates. 7. High temperature resistance and good heat sealability. The water-based screen printing ink has good heat sealing performance, even if PE and PVC are used, a good heat sealing effect can be obtained. 8. The finished product has good leveling property and strong curl resistance. A headache problem in printing is that the substrates are continuously dried through several color groups, and the PVC or artificial leather with extremely low moisture content of the paper or prone to horizontal or vertical shrinkage is easy to curl, making it impossible to produce or use normally. After printing, decorating, bronzing and slitting, the ink products can still maintain good flatness and curl resistance. 9. The price is reasonable. Currently, commercially available water-based screen printing inks are generally about 30% cheaper than solvent-based screen printing inks, which provides a price advantage for expanding market share. In addition to the above-mentioned advantages, the operation method of high temperature resistant water-based screen printing ink is almost the same as that of traditional solvent-based screen printing ink when it is used on a rotary screen rotary machine. But the focus is on the product's PH value control, viscosity, dryness, screen printing mesh selection, oven or drying tunnel temperature control, and under wet printing conditions, the ink may not be fully dried yet being pulled down or contaminated the next color sequence. Especially how to extend the drying time will become the focus of the packaging and printing industry. On the other hand, it can also be applied to flexible gravure rotary printing machines. Kitchen Chopping Boards,Cutting Board,Chopping Board,Cutting Board Set V-Boom's Industrial Co.Ltd , https://www.v-booms.com
Characteristics and application of environmental protection water-based high temperature resistant screen printing ink