A kind of neutral ink prepared by self-dispersing pigment paste and preparation method thereof

Abstract

The invention relates to neutral ink prepared from self-dispersing pigment color paste and a preparation method thereof. The main medium component of the neutral ink is pigment color paste, and components such as water, a surfactant, a thickening agent, a pH regulator, an antibacterial preservative, an antirust agent, a solvent and the like are added. Through mechanical stirring and mixing of the above components, the neutral ink is prepared. The neutral ink comprises, by weight, 20-60% of the pigment color paste, 0.1-3% of the surfactant, 0.1-5% of the thickening agent, 0.1-3% of the pH regulator, 0.1-2% of the antibacterial mildew preventive, 0.1-2% of the antirust agent, 10-40% of the solvent and the rest of deionized water. The preparation technology is simple, is easy for industrial production, and can replace a traditional production technology of preparing ink by grinding dispersing pigment. The pigment color paste used in the invention comprises pigment color paste of various colors. The prepared neutral ink has excellent storage stability and writing performance, and has good compatibility among the components.

Description

technical field [0001] The invention belongs to the field of ink, and relates to a preparation method of a neutral ink, in particular to a neutral ink prepared from a self-dispersing pigment paste and a method thereof. Background technique [0002] Neutral ink, also known as gel ink or gel ink, has a viscosity between oily ballpoint pen ink and water-based ballpoint pen ink. The ink needs to have typical thixotropy (pseudoplasticity), that is, the viscosity of the ink is higher under static conditions, and the viscosity of the ink becomes smaller under the action of shear force, so that the ink can flow out into a line as the ball rolls when writing. Neutral ink pens have the characteristics of smooth writing, clear writing, good color, and writing resistance to water, sunlight, and long storage time, so they are quickly accepted by consumers and widely used. my country is the largest producer of gel ink pens, but so far most of the ink used in gel ink pens is imported, mai...

AI Technical Summary

Problems solved by technology

Generally, the pigments used in neutral inks are high-pigment carbon black, phthalocyanine blue, Hurst red, permanent red, etc., which are traditionally used to prepare neutral ink colorants. Mill, ball mill, colloid mill, or a combination of several to achieve sub-nanometer or nano-scale dispersion of pigments. The color paste prepared by this process has the following serious problems: such as uneven particle size, high energy consumption, easy to Mixed foreign matter, when the pigment particles are ground finer, the surface energy is greater, the mutual cohesion of the particles is stronger, and the pigment particles are prone to flocculation and sedimentation. Therefore, the stability of the finished neutral ink prepared is relatively poor, and it is easy to cause the quality of the clogging of the pen tip. question

[0004] In addition, during the ink preparation process, the ink system components are prone to incompatibility, which leads to the destruction of the stability of the pigment dispersion system, and eventually causes ink quality problems. Therefore, the compatibility between components in the ink preparation process is extremely important.

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