Water-based inks are favored by the market
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With the rapid development of the global economy and the continuous improvement of the quality of life of the people, people's awareness of environmental protection and health is constantly increasing. Water-based inks have become more and more concerned because of their environmental advantages and become the direction of the development of the ink industry. And trends.
The water-based ink is abbreviated as ink, which is mainly processed by water as a solvent. Compared with other printing inks, water-based inks do not contain volatile toxic organic solvents, so the health of the printing press operators during the printing process. No adverse effects, no pollution to the atmospheric environment, no pollution to the printed matter itself, known as "green" printing ink.
Because the ink has the characteristics of non-flammable, it can also eliminate the hidden dangers of inflammable and explosive in the printing workshop, which is conducive to safe production. Of course, the applicable range of ink and ink is different now. The ink is mainly offset printing, and the ink is mainly flexographic and gravure. In developed countries such as Europe, America and Japan, ink has gradually replaced ink, becoming a special ink for printing methods other than offset printing. In the United States, for example, 95% of flexographic prints use ink and 80% of gravure prints use ink. Ink is also particularly suitable for packaging and printing products with strict sanitary conditions such as tobacco, alcohol, food, beverages, medicines, and children's toys.
In recent years, with the continuous modification of resins, the structure of new coatings and inks has undergone great changes. In order to meet the requirements of environmental protection, developed countries have developed a variety of water-based inks, which have begun to be used in paper and plastics. Film, packaging and special printing. The annual production of water-based inks in China is about 100,000 tons, mainly for the production of low-grade paper packaging printing inks. At present, the film-forming materials for aqueous inks are mainly acrylic resins, which are due to the advantages of high stability, good gloss, rheological properties and surface adsorption properties.
This experiment uses solution polymerization method, using methyl methacrylate, a-methacrylic acid, acrylic acid, butyl acrylate, vinyl acetate, ammonia water, triethylamine as the main reagent, and adding ammonium persulfate (initiator); Sodium bisulfite (reducing agent); sodium lauryl sulfate (emulsifier) to prepare an acrylic resin. The above-mentioned resin is added into a pigment, an antifoaming agent, a dispersing agent, etc. to prepare an aqueous ink, and the film forming property, drying time, water resistance and abrasion resistance are measured, and the standard required for printing of the aqueous ink is achieved.