How many problems need to be improved in the development of water-based inks

With the ever-changing printing technology, the quality of water-based inks has become more and more important. As the society does not develop and people's consumption levels increase, corrugated papers must be printed in a direction of high quality, high quality, color, and visual effects. With multi-colored dot printing as the direction, it is also a product packaging to replace transport packaging, with white board cattle card box board Niu card, to achieve bright colors, gloss and beautiful features, to achieve the above standards, the higher the plate, ink The requirements of high-end carton printing plates must be replaced by a flexible version of the rubber plate, but also must use high-quality water-based ink, to achieve bright, fast drying, to meet the requirements of high-speed production.

In order to eliminate the VOCS released by solvent-based systems, that is, to meet the requirements of EPA (the U.S.: Environmental Protection Agent Agent) to reduce or eliminate VOCS, printers are beginning to look for new technologies to create ink-formula designers. Sex is the development of a water-based system that can reduce VOCS. EPA's demand for VOCS will eventually promote the use of ink. At this stage there are pressures from various forces that indicate that environmental issues will receive further attention. In order to achieve higher environmental management goals, printers are always looking for new ways of solvent ink printing operations to meet government regulations. The current focus of the printing industry is on enhancing the handling of emissions from solvent ink printing. The usual practice is to use incinerators to absorb and incinerate VOCS. Others are more creative in the application of VOCS-based microbial or bacterial treatment systems. All of these methods rely on the efficient absorption of VOCS for transport to systems that can be neutralized or incinerated or absorbed by microorganisms.

The former ink users demand improved performance in terms of a stable pH ink system. The ink manufacturing industry must develop inks with stable PH values ​​during the printing process. It is no longer necessary to detect and adjust the pH during printing; re-dissolvability is another important factor. Research area. As the amine volatilizes, the resin tends to cure and even cures on the plate. Recently, ink manufacturers have improved the performance of the resin to make it more soluble, which means that the printing system can be operated for longer and longer time, ie, the throughput is increased; the ink application requires continuous improvement of the application performance of the polyethylene-based substrate. Ink printing and packaging of alkali resistance, and the application of frozen food packaging. The ink-and-wash manufacturing industry is expected to increase the surface resistance of ink-and-ink printing products to make more products water-based, especially in terms of oil resistance, grease resistance, and better heat and freezing resistance.

Waterborne acrylic resin is one of the important raw materials for the manufacture of water-based inks. In order to meet the requirements of the printing process for inks, waterborne acrylic resins have evolved to a higher level. In general, aqueous ammonia is used to dissolve acrylic resin and other water-soluble resins. Ammonia smells large. To reduce the ammonia odor, ammonia-free/amine-based inks that do not use ammonia or amines are now available. This ink has almost no special odor and is a unique system consisting of a sulfonated polyester resin and a water-soluble acrylic resin. To make more environmentally friendly inks, polymerized acrylic resins can be used instead of the commonly used low molecular weight polymers. Because low-molecular polymers produce a certain degree of molecular migration, some of the resin will enter the substrate and package from the ink film after the ink is printed on the substrate. The use of 50% polymerized acrylic resin not only achieves the same plasticizing effect, but also does not destroy the performance of the ink, and no molecular migration occurs after printing.

Alkyd and acrylic hybrid technologies are used in new water-based inks. The mixed resin is made from a water-dispersible long thiol-based alkyd resin in an acrylic acid solution and has a good fast-drying property and adhesion, low VOC, acid resistance, and good alkali resistance. Can be used to make composite paper gravure and flexo inks, varnish and primers.