Anti-settling water-based quick-drying production process of pearlescent printing ink

Abstract

The invention provides an anti-settling water-based quick-drying production process of a pearlescent printing ink. The production process comprises the following steps: 1) one to two days before printing, soaking a pearlescent pigment powder with a particle diameter of 5-25 [mu]m into a mixed solvent to make the pearlescent pigment powder moistened as a paste; 2), adding a thickener, and performing soaking for 3-4 hours to make the oil absorption of the pearlescent pigment reach saturation; 3), after the soaking, performing stirring dispersion at a speed of 150r / min, and performing full soaking; 4), before production use, pouring a high-concentration bright silver oil into the well soaked pearlescent pigment container while stirring, and adding a mixed solvent in an appropriate amount; 5),adding an anti-settling agent of 1%-5%, and detecting the viscosity of the printing ink after stirring for 15 minutes; and 6) in the production process, detecting the viscosity of the ink once every15-20 minutes to ensure that the viscosity is controlled in the range of 30-35 s of a No. 4 cup. According to the printing process, after printing, packaged products have a significant pearlescent effect, and the ink has a good stability on machine, not only can adapt to high-speed machine stable production, but also is easy to combine with a common solvent medium; and the operation is easy, and no pollution is brought.

Description

【Technical field】 [0001] The invention relates to a printing process of ink, in particular to an anti-sedimentation water-based quick-drying production process of pearlescent ink. 【Background technique】 [0002] In recent years, green printing has become the main theme of the development of the industry. Among them, water-based ink is favored by more and more printing companies because of its safety, harmlessness, and environmental protection, and its application fields are becoming more and more extensive. [0003] The printing process of pearlescent printing is basically the same as that of traditional water-based ink printing. Pearlescent printing is a new type of special glossy printing that has been popular in packaging and anti-counterfeiting printing in recent years. Transparent ink, silver glitter refracts through the ink layer to produce a pearlescent effect like pearl luster. This kind of printed matter has two major characteristics: one is that it will produce di...

AI Technical Summary

Problems solved by technology

At the same time, there are also disadvantages. During the use of pearlescent inks, since the diameter of the flakes of pearlescent pigments is generally controlled between 5 and 25um, the multiple reflections and refractions of the light on the surface will increase, and the flashing effect will be strong. The aspect ratio of pearlescent pigment particles is small, it is easy to be suspended in the binder, and it is not easy to settle. It is necessary to add anti-sedimentation agent in the preparation of pearlescent ink to control the viscosity of the ink. If the viscosity is too high, it is not conducive to the transfer of ink to the substrate; if the viscosity is too high Low, the ink in the ink tank is easy to precipitate and agglomerate

[0005] Therefore, in the existing pearlescent printing process, the pearlescent ink is prone to precipitation, resulting in a change in viscosity, which leads to changes in the parameters of the printing machine, and the continuous and stable quality of printing cannot be guaranteed. Although the demand for pearlescent pigments in the printing field is very large, in the production process In terms of stability and printability, it is still difficult to be environmentally friendly and maintain stable production at high printing speeds