At present, problems such as population expansion, resource shortage, and environmental degradation have become the main obstacles hindering social development. People have become more aware of the printing industry's consumption of natural resources and energy and the pollution of packaging waste to the natural environment. In China, with the rapid economic development and GDP growth, "health" and "green environmental protection" have also received more and more attention. Green printing has also become one of the important factors for the construction of a harmonious society. At the same time, the promotion of flexographic printing is an important part of the world's green industry. Sudan Red Event, McDonald's Event, Chen Kaige's "Promise" Shangri-La Event, and the World Environmental Labeling Program (To assist consumers in purchasing truly environmentally friendly products, a reliable, independent and widely accepted environmental labeling program needs to be established. The principle of the period, so as to distinguish the more environmentally friendly products among similar products), all reflect the importance people attach to health and environmental protection.
First, first talk about green printing.
In the 1980s, the North American countries took the lead in the rise of the concept of green printing. At present, green printing is adjusting and guiding the development of the global printing industry with its powerful influence. In foreign countries, European environmental regulations have clearly restricted the emission of volatile organic compounds in the printing industry, which not only increases the content of waste disposal, but also provides a way to reduce ink consumption. For example, as early as June 2000, the UK banned the printing of food packaging films with solvent-based inks. According to statistics, 60% of prints in the UK are printed with non-alcoholic or less-alcohol inks. The US Environmental Protection Administration strongly opposes the use of solvent-based inks. Flexo ink is currently the only non-toxic ink approved by the US Food and Drug Association and is widely used in food and pharmaceutical packaging printing. In addition, in developed countries such as Europe, America, and Japan, in addition to offset printing, ink is gradually replacing traditional solvent-based inks. In 2002, environmental regulations were promulgated in Saitama, Japan, and various printing plates have become the target of control; The prefecture and Tokyo are also preparing to introduce corresponding policies. In recent years, with the increasing awareness of environmental protection among citizens, the environmentally friendly green flexo printing method is more worthy of our expectations!
Ink is composed of coloring materials, additives, etc. The coloring material is the coloring agent, which is the coloring substance of the ink. The connecting material of the ink is mainly composed of an aqueous polymer emulsion or a water-dispersible resin amine compound. Resin is the most important component of the binder. Water-soluble acrylic copolymer resin is commonly used, which directly affects the gloss, chemical stability, water resistance and heat resistance of ink. The amine compounds make the ink weakly alkaline, while water and a small amount of ethanol are used to dissolve the resin to adjust the ink viscosity and drying speed. Auxiliary agents are regulators, including stabilizers, defoamers, diluents, etc., to adjust the PH value of the ink viscosity drying speed, eliminate bubbles and lighten the ink color.
Ink ink does not contain volatile organic compounds, no pollution to the environment and per capita, no toxicity, good ink color stability, high brightness, strong adhesion, adjustable water resistance, excellent printing performance, no residue, non-corrosive plate, etc. Is recognized as a green ink. There is no doubt that the flexographic printing method is the accepted green printing method. This is undoubtedly the fatal injury of offset printing and gravure printing. The inks of offset printing and gravure printing contain heavy metals, and the emissions also pollute the environment. Long-term exposure can cause hidden damage to the health of printing operators. At the same time, printed matter and people's daily life are inseparable. Looking for a truly green printing solution to provide people with healthy, safe and environmentally friendly packaging and printed matter has become an important issue in the printing industry and an important part of how to build a harmonious society .
Second, then, what is the current market share of flexographic printing methods in world printing? What role does it play in building a harmonious society? How does a harmonious society establish the position of green printing?
According to the statistics of the US Flexographic Technology Foundation (FFTA): Flexo represents 75% of the US packaging and printing industry, about 90 billion US dollars, and the 20,000 new foods added every year are definitely stimulants for the flexo market. 24% -26% of today's commodities are flexible packaging materials, and green packaging for food, medicine, beverages, chemicals, electronics, etc. has become an important consideration for people to buy this commodity, coupled with the continuous improvement of flexo printing technology, printed products The quality is close to that of offset printing, which makes flexo printing develop rapidly. Even in traditional regions such as Japan and Brazil where offset printing and gravure dominate, flexo printing is showing a dynamic development trend; cost savings, personalized printing, increased short-lived printing, and narrow-format flexographic printing have also begun popular.
The foreign flexographic market is mainly concentrated in film packaging bags, corrugated paper, food, medicine, beverages, chemicals, electronics, cosmetics, labels, and other aspects that are closely related to people's daily lives. For example, in the United States only, the narrow-width production line is close to 10,000, and the wide-width production line is more than 1,000; Europe has more than 6-7 thousand narrow-width flexible board rotating production lines using green water-based ink or environmentally friendly UV ink to produce packaging and labels Products. And these data are rising, there is a trend of rapid development. Undoubtedly, on the one hand, it is the product of the above-mentioned national policies and regulations, the biggest driving force for promoting the development of green printing, the guarantee for protecting people's healthy life, and the foundation of a stable society.
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