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A kind of preparation method of paper coating, coated paper and paper coating

A coating and paper technology, which is applied in the preparation of coated paper and paper coatings, and in the field of paper coatings, can solve the problems of insufficient drying capacity, easy backflow, and difficulty in dispersion, and achieve enhanced film-forming performance, improved bonding effect, The effect of increasing the solid content

Active Publication Date: 2020-09-18
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plastic pigments and silane-modified polyvinyl alcohol are used in the paint, which are difficult to find, expensive and have no practical operation instructions
For another example, paper coatings include light calcium carbonate, porous pigments, metal salts, and modified polyvinyl alcohol; on the one hand, the above-mentioned modified polyvinyl alcohol is still a silane-modified polyvinyl alcohol that is difficult to find and expensive; On the other hand, the porous pigment used in the coating is difficult to disperse and the process is complicated
Another example is a paper coating, the main pigment system is calcium carbonate, calcined china clay, plastic pigments, and silicon dioxide; this solution uses plastic pigments, which makes the coating cost high; in addition, the solution contains nano-silica, which is difficult to disperse. Paint running error
[0004] The paper coatings in the above-mentioned cases with calcium carbonate as the main pigment system reduce the cost of raw materials compared with the nano-silica-based system, but like the silica or magnesium aluminum silicate system, the coating has low solid content and poor water retention. , during the coating process of large-scale high-speed coating machines, problems such as backflow, yellow lines, insufficient drying capacity and sticky rolls are prone to occur, so the output is low and the production cost is high

Method used

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  • A kind of preparation method of paper coating, coated paper and paper coating
  • A kind of preparation method of paper coating, coated paper and paper coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Prepare paper coating, comprise light calcium carbonate 80g, kaolin 20g, polyvinyl alcohol 15g of degree of alcoholysis 99%, polyfunctional polymer 0.1g, divalent metal salt 20g, defoamer 0.1g, water resistance agent 0.1g, Lubricant 0.1g; the basis weight is 100g / m 2 The paper coating is coated on the base paper with a scraper, and the coating amount is 8g / m 2 , the maximum speed of the coating machine is 1100m / min. At room temperature, the measured solid content of the paper coating is 50.6%, and the static water retention rate is 200g / m 2 ; At room temperature, the measured gloss of the coated paper is 26%, the ink absorption is excellent, and the printing effect is excellent.

Embodiment 2

[0037] Prepare paper coating, comprise light calcium carbonate 80g, kaolin 20g, polyvinyl alcohol 15g of alcoholysis degree 99%, divalent metal salt 15g, defoamer 0.1g, water resistance agent 0.1g, lubricant 0.1g; Weight is 100g / m 2 The paper coating is coated on the base paper with a scraper, and the coating amount is 8g / m 2 , the maximum speed of the coating machine is 400m / min. At room temperature, the measured solid content of the paper coating is 43.6%, and the static water retention rate is 500g / m 2 ; At room temperature, the measured gloss of the coated paper is 26%, the ink absorption is good, and the printing effect is general.

Embodiment 3

[0039] Prepare paper coating, comprise light calcium carbonate 60g, kaolin 40g, polyvinyl alcohol 5g of degree of alcoholysis 99%, polyfunctional polymer 0.5g, divalent metal salt 20g, defoamer 0.5g, water resistance agent 0.5g, Lubricant 0.1g; the basis weight is 100g / m 2 The paper coating is coated on the base paper with a scraper, and the coating amount is 8g / m 2 , the maximum speed of the coating machine is 1100m / min. At room temperature, the measured solid content of the paper coating is 51.2%, and the static water retention rate is 188.75g / m 2 ; At room temperature, the measured gloss of the coated paper is 36%, the ink absorption is good, and the printing effect is excellent.

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Abstract

The invention discloses a paper coating, coating paper and a preparing method for the paper coating. The paper coating is prepared from, by mass, 60-100 parts of light calcium carbonate, 0-40 parts ofkaolin, 3-30 parts of polyvinyl alcohol with the alcoholysis degree larger than or equal to 88%, 0.1-3 parts of a polyfunctional group polymer and 5-40 parts of divalent metal salt, wherein the totalmass of the light calcium carbonate and the kaolin is 100 parts. By means of the paper coating, the coating paper and the preparing method for the paper coating in the mode, the solid content of thepaper coating can be increased, and the running performance of the paper costing is improved.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a paper coating, coated paper and a preparation method for the paper coating. Background technique [0002] At present, high-speed commercial inkjet printing machines based on inkjet technology are developing rapidly in the market, and the demand for applicable inkjet printing paper continues to increase with the increase in the installed capacity of inkjet printing machines. At present, there are relatively mature technical researches on the use of silica, magnesium aluminum silicate and other porous pigments as coating pigments in the coating of inkjet printing paper in China, but because of the high cost and poor coating performance, there is no Mass production. [0003] The research on calcium carbonate as the main pigment system of the coating has also entered a certain stage: for example, in a prior art, paper coatings include light calcium carbonate, plastic pigments, crosslink...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H23/52D21H27/20C09D129/14C09D7/40
CPCC09D129/14D21H23/52D21H27/20C08L101/00C08K2003/265C08K3/346
Inventor 朱叶峰吴国泉孙常芳张菊仙王先清
Owner GOLD EAST PAPER JIANGSU
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