Preparation method and technology of copy paper color developing agent coating and application thereof

Abstract

The invention discloses a preparation method and technology of a copy paper color developing agent coating. The coating is prepared from, by mass, 10-100 parts of light calcium carbonate, 0-90 parts of kaolin, 5-20 parts of starch, 10-30 parts of latex, 10-60 parts of color developing agent, 0.2-5 parts of compound dispersing agent and 50-80 parts of water. According to the carbonless copy paper CF layer coating formula, the light calcium carbonate which is fine and uniform in particle size is adopted, and the compound dispersing agent is used in the formula, so that the prepared costing is low in viscosity, few in bubble, small in dynamic surface tension, high in color developing speed of applied coated paper, high in color developing density, high in whiteness, uniform in hue, good in coating quality, uniform in coating thickness and capable of meeting the high-speed curtain-type coating requirement, and a good coating effect is achieved.

Description

technical field [0001] The invention relates to a preparation method and process for a color developer coating for carbon paper. Background technique [0002] Carbonless copy paper can be divided into two types: other color development and self-development color. The most used is other color development carbonless copy paper, which is generally composed of three paper sheets, namely upper paper, middle paper and lower paper. Upper paper is also called back coated paper (code name CB, that is Coated Back), the back of the paper is coated with microcapsules containing Limin pigment oil; There is a color developer, and the back is coated with microcapsules containing Limin pigment oil; the bottom paper is also called surface-coated paper (code name CF, that is, CoatedFront), and the paper surface is only coated with a color developer. Self-coloring paper (codenamed SC, or Self-Contained) is coated with a microcapsule layer containing Limin pigment oil on the back of the paper,...

AI Technical Summary

Problems solved by technology

[0005] At present, the carbonless copy paper CF layer coating that is common in the market has high dynamic surface tension, poor stretchability of the coating when it runs with the paper at high speed, poor stability of the coating curtain, and the calcium carbonate in the formula has a coarse particle size and a wide particle size volume distribution, and the coating has poor runnability. , high viscosity, many bubbles, slow color development, low color density, can not meet the requirements of high-speed curtain coating, and the proportion of use is generally lower than kaolin

[0006] The preparation method and application of light calcium carbonate for carbonless copy paper coating mentioned in Chinese patent CN101113004A, CN101113007A, CN101113008A, but there is no application of light calcium carbonate for carbonless copy paper coating in CF layer coating in the prior art, Especially in the application of carbonless copy paper CF layer curtain coating