The most popular silk screen printing ink for plas

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Screen printing ink for plastic and paper packaging is a more traditional printing process. Although the proportion of printing in the whole printing market is very small, its development speed has been ahead of the flat, convex and concave printing methods since the 1980s. The annual growth rate of advanced countries in the world has reached 8%~10%. There are also more than 260 printing equipment and equipment manufacturers in China, with about 150000 employees, about 50 kinds of silk printing products, and about 50000 tons of annual consumption nationwide. In recent years, with the continuous improvement of people's living standards as shown in the structural block diagram, people's requirements for packaging are no longer limited to protecting goods and facilitating transportation, but for packaging, decoration and modeling, including high-pressure resin transfer molding Liquid molding, sheet molding, pre molding and injection molding design also put forward higher requirements

the range of printing materials for silk printing is very wide, and there are many materials used in packaging, such as plastic, paper, metal, glass, ceramics and various composite packaging materials. The following describes the application of two inks in printing and packaging materials:

I. application of plastic packaging

common materials for plastic packaging include polyethylene (mainly high-pressure and low-pressure polyethylene), polypropylene, polyvinyl chloride, polyvinylidene chloride and polyester. Most of the silk printing inks used in plastic packaging belong to volatile dry type, which requires them to have good printing leakage, fluidity, anti binding and adhesion

II. Application in paper packaging

due to the thick ink layer and strong three-dimensional sense of the printed pattern, the packaging grade can be greatly improved (2) thinking about the planned construction of the city's trade logistics park. In addition to being the largest market, common paper packaging materials mainly use medium and high-grade paper and paperboard, such as glass paper, gold paper, silver paper, etc. It is characterized by small fiber pores and tight texture. This series of inks are required to have light resistance, heat resistance, solvent resistance and abrasion resistance in printing

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