Screen printing is a more traditional printing process. Although the proportion of screen printing in the whole printing market is very small, but since the 1980s, its development rate has gone ahead of flat, convex, concave and other printing methods. Advanced countries of the world's annual rate of 8% ~ 10%, screen printing equipment and equipment manufacturers in China also has more than 260, employees 150000 people, 50 kinds of screen printing products, the annual consumption of about 50000 tons, in recent years, as people's living standards improve, people no longer limited to the requirement of the packaging to protect goods and convenient transportation, Packaging, decoration and modeling design also put forward higher requirements.

Screen printing substrate material range is very wide, in the packaging of the application of more materials, plastic, paper, metal, glass, ceramics and a variety of composite packaging materials screen printing in plastic packaging application. The following two kinds of ink in the application of printing and packaging materials:

A, the application of plastic packaging

Plastic packaging materials commonly used are: polyethylene (mainly high pressure and low pressure polyethylene), polypropylene, polyvinyl chloride, polyvinylidene chloride and polyester. Most of the screen printing inks used in plastic packaging belong to volatile drying type, which requires good leakage, fluidity, anti-netting and adhesion. Suzhou silk screen printing ink

Two, paper packaging application

Because the ink layer of screen printing pattern is thick and three-dimensional, it can greatly improve the grade of packaging. General paper packaging materials are mainly used in high-grade paper and cardboard, such as glass card paper, gold card paper, silver card paper and so on. The fiber is characterized by small porosity and compact texture. This series of ink requires light resistance, heat resistance, solvent resistance and friction resistance in printing.