Coating, preparation method and matte coated paper using the coating

Abstract

The invention discloses paint, a preparation method and matt coated paper applying the paint. The paint is prepared from talcum powder, ground calcium carbonate C65, ground calcium carbonate C98, an auxiliary agent, a dispersant and water, wherein the content of grains with the grain diameter of less than 2mu m in the talcum powder is 45 percent to 55 percent; the content of grains with the grain diameter of less than 2mu m in the ground calcium carbonate C65 is within 60 percent to 65 percent; the content of grains with the grain diameter of less than 2mu m in the ground calcium carbonate C98 is more than 98 percent. The matt coated paper prepared according to a paint formula and the preparation method of the paint, disclosed by the invention, has relatively high printing glossiness and good printing quality; the coated paper is not dazzled when being illuminated and the surface feeling of the coated paper is greatly improved; the drying performance of printing ink is improved and the printing applicability is improved.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a coating, a preparation method and a matte coated paper using the coating. Background technique [0002] The production of matt coated paper must achieve a certain balance between roughness, paper gloss, printing gloss and printing wear. At present, most of them adopt the method of matching coarse and fine pigments. It is hoped that a suitable coating structure can be produced through the combination of thick and fine pigment particles. The rigid coating formed by coarse and blocky pigment particles can not only reduce the gloss of the paper sheet, but also be able to withstand a certain degree of calendering. . Fine or ultra-fine pigment particles are filled in the middle of these coarse particles. During the calendering process, the presence of coarse particles prevents the fine particles from excessive calendering, resulting in a rapid increase in gloss. This not only r...

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Problems solved by technology

[0003] However, this kind of pigment matching system has relatively strict requirements on the ratio of the two components of thick and fine pigments, which is likely to have a negative impact on the quality of matte coated paper, especially when the quality of pigment production is unstable and the particle size distribution is not easy to control.

Excessive amount of coarse particles, the gaps between coarse particles cannot be fully filled by fine particles, resulting in high printing abrasion and low printing gloss of the paper; insufficient amount of coarse particles will cause the fine particles to be calendered, resulting in too high paper gloss

[0004] Spot phenomenon is a unique appearance paper defect of matte coated paper, that is, uneven gloss appears on the surface of coated paper. Its characteristics are mainly reflected in two aspects: brighter gloss points appear on local points, and paper surface It looks uneven, so it visually presents uneven and discontinuous bright spots. During the printing process, due to the different absorption of printing ink between this point and other points, it will cause the loss of dots, and there are differences in overprinting colors, which are prone to color tones Unevenness, which seriously affects the quality of printed matter

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