At present, in packaging and printing, the environmental protection type high temperature resistant (121 to 150 degrees C) silk ink has become the focus of attention. The so-called environmental protection high temperature resistant printing ink, is in the packaging product surface has been completed graphic screen printing process, printing ink layer can be adapted to heat water soluble ink layer, and has a certain water resistance, to adapt to environmental protection, decoration and substrate with ink. The screen printing of environmental protection and resistance to high temperature ink will not change its process because of environmental protection and high temperature resistance. But its characteristic is to adjust the ink with the dilution of pure water. Especially when the printing product is subjected to a certain high temperature, the ink film of printing ink will improve its fastness, so that it will not cause the ink film to soften or adhesion due to the heat of the environment, resulting in defective products or even scrapping. According to the needs of the users and the actual printing process requirements, the products can be used in different screen printing processes. To this end, the crowd is here to give a brief introduction to the design and application of the product.
The characteristics of water resistant high temperature silk printing ink:
Waterborne and heat resistant screen printing inks are non-toxic, tasteless, volatile organic solvents, low cost, wide source of materials, good gloss, heat resistance, heat resistance, abrasion resistance, water washability, economic hygiene and so on.
The water resistant high temperature silk printing ink can be divided into three kinds, such as high gloss, ordinary gloss and sub light, according to the use of the product. From the screen technology can be divided into: manual screen printing and round screen rotary screen two types. Waterborne screen printing and high temperature resistant ink can eliminate the harm to the human body and the environmental pollution during its use. It has been valued by the packaging and printing enterprises, such as food, artificial leather, bags and so on.
In addition to environmental protection, silk ink with high temperature resistance has the following advantages compared with solvent type ink printing ink.
1. heat-resistant and washable.
2. the transparency is high. The printed matter is bright and can be preserved on the printed matter for a long time. Under intense sunlight, it is not easy to yellowing, discoloring and fading.
3 strong wear resistance. Packaging and printing accessories need strong wear resistance. For each pressure measurement of 50 centimeters per square centimeter, it should generally reach 150 per point, and the brightness is generally 50~70 brightness units. Therefore, the packaging and silk printing products not only wear resistance, 30 `8d_? When the clock is washed, it can meet this requirement when it is up to 121 ~ 150 C (3 seconds to 10 seconds).
After 4. printing, the film has fast film forming speed and rapid drying. The drying process of waterborne high temperature screen printing ink is 60% by evaporation or volatilization, 40% by material penetration and absorption and rapid drying, and about a few minutes or dozens of minutes to complete the printing ink conjunctiva. If the method of infrared or hot air drying can be used to dry the film.
5. the use and storage are convenient and safe, and it is beneficial to the safety of production and the improvement of the working conditions of the operating staff. As solvent or oil screen printing ink belongs to the category of dangerous goods, transportation, storage and use are rather inconvenient. It is safe and safe to clean the equipment and clean the finger with water.
6. innocuous and tasteless. Because water-based screen printing ink uses water as solvent and a small amount of volatile edible alcohol as auxiliary solvent, it is especially suitable for food, clothing, artificial leather and plastic substrates.
7. high temperature resistance and good heat sealing. Waterborne screen printing ink has good thermal sealing performance, even using PE and PVC can also obtain good heat sealing effect.
8. finished product has good leveling property and strong anti curling ability. A troublesome problem in printing is the continuous drying of substrates through several color groups. The PVC of paper moisture content is very low, or it is easy to produce transverse shrinkage or longitudinal shrinkage. The artificial leather is easy to curl, so that it can not be produced or used normally. The ink products can still keep good evenness and curl resistance after printing, decorating, stamping and cutting.
9. the price is reasonable. At present, the price of waterborne silk printing ink sold in the market is about 30% lower than that of solvent screen printing ink, which provides a favorable condition for the expansion of market share.