Method for preparing aqueous ink special for cartons

Abstract

The invention relates to a method for preparing aqueous ink special for cartons, which comprises the following steps: adding 100 portions by weight of water into a stirring kettle and then heating thewater, adding 2 portions by weight of methanol into the water when the temperature of the water rises to 65 DEG C, then slowly adding 50 portions by weight of rosin resin into the mixture under stirring, stirring the mixture again when the temperature of the water rises to 75 to 80 DEG C, adding 6 portions by weight of ethanolamine into the mixture to be stirred, adding a mixture of 1 portion byweight of the methanol and 6 portions by weight of ammonia water into the mixture when the temperature is reduced to be below 70 DEG C, and continuously stirring the mixture to achieve the pH value of8.5 to 9 and obtain rosin oil; mixing 100 portions of the rosin oil, 35 portions of pigment, 10 to 15 portions of emulsifying oil, 1 portion of antifoaming agent and 100 to 300 portions of water by weight portion, and then grinding the mixture into color paste; and adding 40 to 50 portions of the rosin oil, 3 portions of the emulsifying oil, 0.2 portion of the antifoaming agent, 0.5 portion of the ethanolamine, 3 portions of antimicrobial Nipagin esters and 10 to 100 portions of the water by weight portion into 100 portions by weight of the color paste, and mixing and stirring the mixture atnormal temperature to obtain the aqueous ink. The preparation method has simple process; and the prepared aqueous ink has the advantages of bacteria and mildew resistance, good water resisting property, decoloring resistance and low cost, and can be widely applied to external packing cartons of food and the like.

Description

Technical field: [0001] The invention relates to a preparation method of a novel printing ink, in particular to a preparation method of a water-based ink used for food and other outer packaging cartons. Background technique: [0002] At present, the ink used for carton printing occupies a large proportion of letterpress printing inks. Due to the large difference in the storage environment of cartons, if the storage time is too long in a humid or open environment, the ink is prone to discoloration and mold growth, which will cause damage to the packaging. Pollution and reduced aesthetics. Chinese patent application CN1237602A discloses a formula and production process of water-based ink for cartons using triethanolamine and the like as raw materials. Although the products produced have the characteristics of good water resistance and non-fading, there are also major defects. Because there is no suitable antifungal agent added, its antibacterial effect is very poor, and the ...

AI Technical Summary

Problems solved by technology

This technology uses an inorganic and organic compound antibacterial agent. Although the ink has good antibacterial properties, the preparation process is relatively complicated and the price is too expensive. It is only suitable for printing on high-grade paper such as coins, and its application range is small.

[0003] To sum up, the existing water-based inks for carton printing generally have the disadvantages of poor antibacterial effect and high production cost, and there is no water-based ink specially designed for cartons that has the advantages of high quality, low price, mildew resistance and antibacterial.