Gravure ink binder is a kind of adhesive resin, which is the chain component of ink. It can bond pigment and printing material together, and make ink glossy. Pigments determine the kind of color. Solvent dissolves resin, adjust viscosity, adjust drying speed, improve the wettability of printing materials. The additives can improve the viscosity, weather resistance, aging resistance and luster. This paper briefly analyzes the difference between the inside printing ink and the surface printing ink.               1 The main binder of surface printing ink is polyamide resin, which has good adhesion and luster. However, it is not suitable for high temperature conditions and has poor fastness when compounding (but many enterprises can achieve high temperature resistance at present). The binder of non cooking ink is mainly chlorinated polypropylene, and nitric acid fiber and vinyl chloride vinyl acetate copolymer resin are also used at home and abroad. The main solvents used in surface printing ink are xylene and isopropanol. In general, toluene and ethyl acetate are the main solvents for inking. High temperature cooking ink is mainly ethyl acetate, ethyl acetate and so on. Printing ink solvent suitable for high-speed printing, solvent volatility is fast, solvent residue is particularly small. At present, environmental friendly inks are used ester, alcohol solvent to dilute ink. Benzene ink has been eliminated constantly, which is harmful to workers' health and product health and environmental protection. Dongchang group has always recommended environmental friendly ink. 3. Wear resistance difference                      3. Inside printing ink resin chlorinated polypropylene resin rigidity is particularly good, wear resistance is poor, due to the printing, the wear resistance requirements are correspondingly lower. 4. The difference of excipients                                      . Inside printing ink also adds all kinds of pigment dispersant, enhancer, defoamer and other auxiliaries. 5. The difference of printing process                                   . The printing speed of surface printing ink is slow, and the printing speed of inner printing ink is faster than that of surface printing. Printing color sequence is also different. Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
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