How many problems need to be improved in the development of water-based inks
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How many problems need to be improved in the development of water-based inks:
As printing technology changes with each passing day, the quality of water-based inks is becoming more and more important. With the development of society and the improvement of people's consumption level, the printing of corrugated paper must gradually develop in the direction of high-grade, high-quality, color and visual effects. With the multi-color dot printing as the direction, it is to replace the transport packaging with the product packaging, and to use the white card cow card to make the box cattle card, to achieve the characteristics of bright color, beautiful gloss, etc. To achieve the above standards, the plate making and ink are higher. The requirements for medium and high-grade carton printing and plate making must replace the rubber plate with a flexible version. High-quality water-based inks must also be used to achieve bright, fast-drying and high-speed production.
In order to eliminate the VOCS released by solvent-based systems, that is, the EPA (the U.S.:Environmental Protection Agenty) reduces or eliminates VOCS requirements, printers are looking for new technologies to suit ink formula designers, a possibility Sex is the development of a water-based system that can reduce VOCS. EPA's long-standing VOCS requirements will ultimately promote the use of ink. At this stage, there are pressures from various forces to show that environmental issues will be further concerned. In order to achieve higher environmental management goals, printers are always looking for new ways to process solvent ink printing operations to meet government regulations. The current focus of the printing industry is to enhance the treatment of emissions from solvent ink printing. The usual practice is to use an incinerator to absorb and incinerate VOCS. Other more creative is the application of microbial or bacterial treatment systems that use VOCS as food. All of these methods rely on the efficient absorption of VOCS to a system that can be neutralized, either incinerated or absorbed by microorganisms.
Former ink users demand improved performance: the ink system with stable pH value, the ink manufacturing industry must develop ink with stable pH value during printing, no need to detect and adjust PH value in printing; resolubility is another important Research area. The resin tends to solidify during the evaporation of the amine, even in the printing plate. Recently, ink manufacturers have improved the properties of resins to make them easier to dissolve, which means that printing systems can be used longer, time-consuming, that is, increased throughput; ink applications require continued improvement in the performance of polyethylene-olefin substrates. The alkali resistance of ink-printed packaging and its application in frozen food packaging. The ink manufacturing industry is expected to improve the surface resistance of ink prints to make more products water-based, especially in terms of oil resistance, grease resistance, and better heat and freeze resistance.
Waterborne acrylic resin is one of the important raw materials for the manufacture of water-based inks. In order to meet the various requirements of the printing process for inks, waterborne acrylic resins are developing at a higher level. Usually, ammonia water is used to dissolve the acrylic resin and other water-soluble resins in water. The ammonia smell is large, and in order to reduce the ammonia smell, there is now an ammonia-free/amine-based ink that does not use ammonia or an amine. This ink has almost no special odor and is a unique system composed of a sulfonated polyester resin and a water-soluble acrylic resin. To make a more environmentally friendly ink, a polymerized acrylic resin can be used instead of a conventional low molecular weight polymer. Because low molecular weight polymers produce a certain degree of molecular migration, some of the resin enters the substrate and package from the ink film after the ink is printed onto the substrate. The use of 50% of the polymerized acrylic resin not only achieves the same plasticizing effect, but also does not destroy the performance of the ink, and molecular migration does not occur after printing.
Alkyd and acrylic blending techniques are used in the new aqueous inks. The mixed resin is made of a water-dispersed long-base alkyd resin in an acrylic acid solution, so that the ink has good fast-drying property and adhesion, low VOC, acid resistance and alkali resistance. Can be used in the manufacture of composite paper gravure and flexo inks, varnishes and primers.