Water-based inks: Water-based inks are abbreviated as water inks and are made by compounding and grinding of water-soluble resins, organic pigments, surfactants and related additives.
In the flexo package printing, the vast majority of the current domestic and international use of water-based ink printing, flexible water ink is widely used, is an important factor in the rapid development of flexographic printing. Due to the absence of volatile organic solvents, water-based inks greatly reduce the emission of VOCs (organic volatiles), thereby reducing air pollution, improving the environment for printing operators, and contributing to the health of employees. It can completely eliminate certain toxic and harmful substances in solvent-based ink, harm to human body and pollution to packaged goods, and improve the overall environmental quality. It is especially suitable for hygiene conditions such as tobacco, wine, food, beverages, medicines and children's toys. Strict packaging and printing products are required. .
In addition, it can not only reduce the risk of fire caused by static electricity and flammable solvents and hidden dangers, but also can reduce the residual toxicity of the printing surface, and convenient cleaning of printing equipment, so water-based ink is called a new type of printing material . At present, whether it is imported water-based ink, or domestic water-based ink is not anti-alkali, nor resistant to ethanol, water resistance, slow drying, poor gloss, easy to cause paper shrinkage and other drawbacks, to achieve anti-alkali, anti-ethanol, anti-water and improve Gloss, only flexible UV inks are used. This not only increases the printing cost, but also increases the printing process. If there is an automatic beer packaging production line, the use of alkaline lubricants, the PH value of 9-10, water-based ink can not bear, touch on the fade, and the summer when the South sells beer not only into the refrigerator, and some are still ice Long-term soaking in water, water-based ink can not afford it. In order to solve these problems, our institute has used its own advantages to organize scientific research personnel to tackle the problem. After more than two years of hard work, it has finally developed a series of high-precision water-based ink products that are non-toxic, non-irritating, and non-irritating. Corrosive, non-flammable, non-explosive, good safety, high concentration, low viscosity, stable performance, good printing adaptability, high adhesion fastness, fast drying, water resistance, alkali resistance, ethanol resistance and anti-wear performance, products are in use The process can be directly diluted with tap water or ethanol. The printing equipment can be directly cleaned with tap water. It is not harmful to the environment and human body. After dried, the printed matter is not only free of harmful residual substances, but also insoluble in water, ethanol and alkaline substances. Completely solve the water-based ink resistance to water, alkali and ethanol. It can completely replace the high-grade imported water-based ink, and it has played an active role in promoting the localized products of China's flexographic printing.
Flexographic printing has advantages such as simple equipment structure, wide application range, high production efficiency, short plate-making cycle, and use of water-based ink that does not pollute the environment. In recent years, it has been more and more widely used in the field of packaging and printing in China, wine, light industry, cosmetics and children's toys, and corrugated cartons have become one of the main areas of flexo printing. Flexo printing has many advantages over gravure printing and offset printing. Compared to gravure printing, it has a short plate making cycle, high overprinting accuracy, and low price. Because of the use of water-based ink, it has no pollution, no toxicity, and is convenient for cleaning printing equipment. It has a wide range of printing and is suitable for middle-grade and batch printing. Relative to offset printing, its high resistance to printing force, fast printing speed, pollution-free, large print, suitable for large-volume live, film coating, connection bronzing, concave and convex die cutting are relatively easy to achieve.
Project Offset Gravure Flexo Printing Applicable Substrate Paper Films, Paper, Metal Foil Films, Paper, Metal Foil Material Print Quality is Good, Thin Films are Rich, Colors are Rich, Vivid, Good, Thin Films Strong and weak ink types Oily inks Solvent inks or water-based inks or solvents Ink making time is short and short. Printing speed is slow. Fast plate making costs are low. High, low industrial pollution, pollution, pollution, non-pollution, water-based ink Market prospects:.
Water-based ink, also known as liquid ink, was introduced in China in 1975. It was first developed and put into production by the Tianjin Ink Factory. At that time, it was mainly gravure printing service. At that time, the gravure printing ink was improved from a benzene solvent to a gasoline-based solvent. Benzene inks have improved but flammability has not improved. Therefore, it was proposed that the gravure printing ink be further improved to a non-toxic, non-flammable water-based ink, which was called water-concave ink at that time. Because the ink is made of rosin acid amine salt as the main connecting material. The connecting material is not stable in an aqueous medium, so the ink is easily lost in the storage, thinning, slow drying, poor water resistance, easy to cause paper shrinkage and other defects. China's gravure printing and flexographic printing have been limited, and they have to adopt high-priced imported high-quality water-based inks, which virtually increase the printing cost and limit the development of China's printing industry. In the 1990s, with the rapid development of our country’s economy, people’s awareness of packaging aesthetics and environmental protection have continued to increase. From 1995 to the end of 1998, China has introduced more than 130 modular flexo lines in just a few years. It is distributed in more than 20 provinces and cities across the country, 90% of which are narrow-format flexo presses. It is now 30 years a year. The number of left and right stations has been increasing, and there are many imported high-end tri-color and four-color water-based ink printing slot machines for color printing of corrugated paper. .
According to statistics from relevant authorities, there are more than 1,000 carton factories in each province in China. If 10% of water-based inks are used to print high-grade cartons, each household uses 10 tons of ink, and each province needs 1,000 tons of water-based ink every year. This is not yet Other printing and packaging products including flexo and gravure printing (currently, 100% of domestic flexographic printing uses water-based ink, and 80% of gravure printing uses water-based ink). For this reason, the production plant designed to produce 300 tons of water-based ink per year can only meet the needs of the local market.
Although flexographic printing is still a starting class in China, it currently accounts for only about 3% of the printing industry. However, with the increasing popularity of green packaging and environmentally-friendly packaging, many tobacco companies, wineries, pharmaceutical companies, cosmetics, and children's toy companies are The use of flexographic printing products is planned, and the proportion of flexo printing in the printing field will gradually increase, especially in the field of packaging and printing. .
It is estimated that by 2010, flexographic printing will reach about 15% in the printing field, and annual demand will be over 100,000 tons of water-based ink. Therefore, it is imperative to vigorously develop, develop, and produce high-grade water-based inks with great market potential. The product can be widely used in flexographic and gravure printing fields such as gold, silver cardboard, art paper, white board, plastic film, corrugated paper, self-adhesive paper, carton, paper packaging, books and magazines. This technology has been accepted as a patent for invention by the national patent office, and has passed the inspection and verification by the National Ink Quality Inspection Center. Main technical indicators of flexo and gravure printing: No. Item Name Technical Index 1 Color Approximate Standard 2 Fineness<10μm 3 Coloring Strength 90-110% 4 Viscosity (Paint No. 4 Cup, Second/25°C) 50±30 5 PH Value (PH value detector) 8.0-9.5 6 Primer dry 15-30cm 7 Alkali resistance, water resistance 24h Good 8 Storage stability (5-30°C) Good 9 Gloss (60°C) >80%