Preparation method of producing high-concentration kaolin planographic printing ink by adopting secondary kneading method

Abstract

The invention relates to the technical field of planographic printing ink, in particular to a preparation method of producing high-concentration kaolin planographic printing ink by adopting a secondary kneading method. The preparation method comprises the following specific steps: mixing mixed base ink, pigment connecting materials, friction-proof auxiliaries and ink oil, wherein the mixed base ink adopts secondary kneading technique, high-concentration kaolin and moisture-containing tinting pigment are added for first-time kneading, and soft water is added for secondary kneading after the replacement and dewatering are conducted. Compared with the prior art, according to the preparation method, the production technique is simplified, the production efficiency can be improved, the problems of declining qualities such as the brightness, flowability of the ink, and the like can also be stopped even if the content of the kaolin in the ink is increased, so that the addition amount of the kaolin with lower cost can be increased, the planographic printing ink with good dispersity and excellent brightness and flowability properties can be prepared, the production cost can be further lowered, thereby having better market prospects.

Description

technical field [0001] The invention relates to the technical field of lithographic inks, in particular to a preparation method for producing high-concentration kaolin lithographic inks by a secondary kneading method. Background technique [0002] In the prior art, in order to adjust the fluidity and viscosity of the ink and improve the printing adaptability of the ink when producing lithographic inks, it is usually necessary to use inorganic pigments such as calcium carbonate, clay, silica or kaolin. Diluted ink and colored pigment-based ink are prepared in two steps, that is, the inorganic pigment and pigment binder are mixed and ground to prepare diluted ink, and then the colored pigment and pigment binder are stirred, ground, dehydrated, etc. The first process is to prepare the colored pigment-based ink, and finally the diluted ink is further mixed with the colored pigment-based ink, and the ink with the desired properties is prepared through a series of adjustment proce...

AI Technical Summary

Problems solved by technology

[0003] However, kaolin is difficult to finely disperse. During the mixing process of kaolin and pigment binder, due to the influence of temperature and other conditions, the dispersibility of the diluted ink produced is poor. When entering the next grinding process, it is necessary to increase the number of times of grinding. The fineness of the diluted ink is controlled within the acceptable range, resulting in low ink production efficiency and high cost; on the other hand, in the existing technology, the kaolin diluted ink and the colored pigment base ink are produced separately, and the process is complicated, so that It affects the production efficiency and cost of the ink; moreover, because kaolin itself contains water-soluble components, when the amount of kaolin added increases, that is to say, with the increase of the amount of kaolin ink added, ink glossiness, fluidity, etc. will occur. The decline in quality will lead to problems such as paste and ink accumulation in actual printing. Therefore, it is very difficult to use a large amount of kaolin in lithographic inks, which limits the amount of kaolin added, and it is difficult to reduce the cost of ink.