Preparation method for producing lithographic ink containing calcium carbonate by one-step kneading method

Abstract

The invention relates to the technical field of lithographic inks, in particular to a preparation method for producing lithographic inks containing calcium carbonate by a one-step kneading method. Add 40% to the kneader at one time, and prepare a mixed base ink with a higher concentration of calcium carbonate by one-step kneading. Compared with the prior art, the present invention not only simplifies the production process, improves the production efficiency, reduces the production cost, but also increases the content of calcium carbonate in the ink, and can still obtain the lithographic ink with better ink gloss and fluidity, Therefore, it has a broad market prospect.

Description

technical field [0001] The invention relates to the technical field of lithographic inks, in particular to a preparation method for producing lithographic inks containing calcium carbonate by a one-step kneading method. Background technique [0002] In the production of lithographic inks, in order to adjust the fluidity and viscosity of inks and improve the printing adaptability of inks, inorganic pigments such as kaolin, calcium carbonate, clay, and silica are usually used as extender pigment dispersions for oily printing. A two-step process is required to prepare the diluted ink and the colored pigment-based ink respectively. The steps include: first, the inorganic pigment and the pigment binder are stirred and mixed, and after grinding, the diluted ink is prepared, and then the colored pigment and the pigment binder are stirred, Grinding, dehydration and other processes are used to prepare the colored pigment-based ink, and finally the diluted ink is further mixed with th...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, since calcium carbonate is naturally dry powder, the price is low and easy to obtain, thus dry powder calcium carbonate is used to prepare calcium carbonate diluted ink, but dry powder calcium carbonate is difficult to finely disperse, such as directly connecting with coloring pigments and pigments The mixing of materials such as raw materials will cause uneven mixing of materials. The prepared mixed ink contains a large amount of granular substances, and its dispersibility is very poor. Therefore, in the actual production process, in order to make the dry powder calcium carbonate disperse evenly, a two-step process method is adopted. , first prepare the dry powder calcium carbonate into calcium carbonate dilute ink, then prepare the color pigment into color pigment base ink, and finally mix the calcium carbonate dilute ink and color pigment base ink to prepare ink; however, this two-step Process method, the preparation of calcium carbonate dilute ink and colored pigment base ink are produced separately, the process is complicated, and under the existing temperature, grinding and stirring process conditions, it needs to consume a lot of energy and the production cycle is long, for example, it needs to increase Grinding times and time can control the fineness of calcium carbonate diluted ink within the acceptable range, which leads to low ink production efficiency and high cost; on the other hand, filter cake pigments are usually used as coloring pigments, because filter cake pigments contain water Yes, when increasing the amount of dry powder calcium carbonate, that is to say, as the amount of calcium carbonate diluted ink increases, the ink quality of the actually produced ink will decrease in gloss, fluidity, etc., which seriously affects the performance of the ink; Furthermore, the use of dry calcium carbonate powder will cause material scattering during the batching process, which will make the working environment of the workshop poor and affect the health of the workers.

Due to the above defects, the currently produced lithographic inks greatly limit the amount of calcium carbonate used, and it is difficult to obtain lithographic inks with high production efficiency, low cost and good quality.