Pigment color paste for internal on-line toning, surface sizing and coating of cultural pulp and preparation method thereof

Abstract

The invention discloses a pigment color paste for the on-line color mixing, surface sizing and coating of culture paper pulp and a preparation method thereof. At present, most pigment color pastes cannot meet the requirements of paper-making factories, have poor stability and cannot easily control obvious defects such as poor diluting stability, low retention rate and poor color light consistency on the application aspect. The pigment color paste consists of a high-performance organic pigment, a dispersing agent, a wetting agent, a retention assistant agent, a function additive and deionized water; and the pigment color paste is prepared according to a plurality of steps such as mixing, wetting, dispersing and grinding all the components. The prepared nano-colored paste with high color content, low viscosity and high retention is stable to store; the paste has hard water resistance and high dilution stability, can be on-line directly added; the paste has a bright color, high retention rate and a small use amount; the paste has good light resistance and thermal resistance and can greatly improve the product quality; and the paste has good compatibility and cannot cause bad physical and chemical reaction with other paper-making chemicals when being added in a correct position.

Description

technical field [0001] The invention relates to the field of color paste, in particular to a pigment color paste used for in-line toning, surface sizing and coating of cultural pulp and a preparation method thereof. Background technique [0002] For a long time, basic dyes and direct dyes have been widely used for coloring of cultural paper. Basic dyes have bright color and low price, but they have structural defects such as light resistance and poor heat resistance, so they can only be used for low-end cultural paper, especially It is some low-end offset paper made of mixed pulp; although the price of direct dye is moderate, and its light resistance and heat resistance can also meet the production needs of high-end cultural paper, but in high-white offset paper, especially electrostatic copy paper, the brightness is low , the color light is dark, which greatly limits its further development. [0003] In recent years, with the maturity of mechanical technology and dispersio...

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Problems solved by technology

[0004] In view of the various advantages of pigment pastes, domestic chemical companies have followed suit, but paper-making pigment pastes are different from paper-making dyes, and are also quite different from ordinary water-based pigment pastes. The core technology is not only in the product itself, but more in Equipment manufacturing technology and production control technology, so most of the product technology is difficult to meet the needs of paper mills, and the stability is poor, especially in the application, such defects as poor dilution stability, low retention rate, and poor color consistency are difficult to control

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