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Preparation method of calcium carbonate filled high-strength coated paper

A technology of calcium carbonate and coated paper, which is applied in the field of papermaking, can solve the problems of reducing the strength of coated paper, destroying the hydrogen bond force of plant fibers, etc., and achieve the effect of reducing raw material costs and saving consumption

Inactive Publication Date: 2020-06-12
董海强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the above-mentioned patent, the preparation method of porous calcium carbonate is improved, and the porous calcium carbonate is used as the filler of the coated paper, thereby reducing the production cost, but because the porous calcium carbonate is an inorganic filler, filling and embedding it in the plant fiber will destroy the quality of the plant fiber. The hydrogen bond force between them, thus reducing the strength of the coated paper

Method used

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  • Preparation method of calcium carbonate filled high-strength coated paper

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Embodiment 1

[0029]The pretreatment method of calcium carbonate powder comprises the following steps:

[0030] Add the silane coupling agent KH550 into deionized water and stir to dissolve to obtain a silane coupling agent solution with a mass concentration of 2%. According to the ratio of calcium carbonate to silane coupling agent mass ratio of 1:0.2, add calcium carbonate powder to the silane coupling agent solution, heated to 60°C in a water bath, kept stirring for 1 hour, filtered and separated, and the product obtained by the reaction was added to a carboxymethyl cellulose solution with a mass concentration of 6.0 wt%, and a tin tetrachloride catalyst was added. The amount of tin tetrachloride added was 1.5wt% of carboxymethyl cellulose mass, heated to 80°C in a water bath, stirred for 3h, suction filtered, and dried to obtain cellulose-grafted calcium carbonate particles. Add a proportion of 80mL to deionized water for ultrasonic vibration dispersion to obtain a suspension, heat the ...

Embodiment 2

[0039] The pretreatment method of calcium carbonate powder comprises the following steps:

[0040] Add the silane coupling agent KH550 into deionized water and stir to dissolve to obtain a silane coupling agent solution with a mass concentration of 2%. According to the ratio of calcium carbonate to silane coupling agent mass ratio of 1:0.2, add calcium carbonate powder to the silane coupling agent solution, heated to 60°C in a water bath, kept stirring for 1 hour, filtered and separated, and the product obtained by the reaction was added to a carboxymethyl cellulose solution with a mass concentration of 3.0 wt%, and a tin tetrachloride catalyst was added. The amount of tin tetrachloride added was 1.5wt% of carboxymethyl cellulose mass, heated to 80°C in a water bath, stirred for 3h, suction filtered, and dried to obtain cellulose-grafted calcium carbonate particles. Add a proportion of 80mL to deionized water for ultrasonic vibration dispersion to obtain a suspension, heat the...

Embodiment 3

[0049] The pretreatment method of calcium carbonate powder comprises the following steps:

[0050] Add the silane coupling agent KH550 into deionized water and stir to dissolve to obtain a silane coupling agent solution with a mass concentration of 2%. According to the ratio of calcium carbonate to silane coupling agent mass ratio of 1:0.2, add calcium carbonate powder to the silane coupling agent solution, heated to 60°C in a water bath, kept stirring for 1 hour, filtered and separated, added the product obtained from the reaction to a carboxymethyl cellulose solution with a mass concentration of 5.0 wt%, added tin tetrachloride catalyst, and the amount of tin tetrachloride added 1.5wt% of carboxymethyl cellulose mass, heated to 80°C in a water bath, stirred for 3h, suction filtered, and dried to obtain cellulose-grafted calcium carbonate particles. 80mL was added to deionized water for ultrasonic vibration dispersion to obtain a suspension, and the suspension was heated to 8...

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Abstract

The invention relates to the technical field of coated paper, and discloses a preparation method of calcium carbonate filled high-strength coated paper. The preparation method comprises the followingsteps: 1) mixing softwood pulp and hardwood pulp, and then carrying out repulping and pulping to prepare plant fiber pulp; 2) adding the eucalyptus bleaching and hot-grinding mechanical pulp and the modified calcium carbonate into the plant fiber pulp, and uniformly stirring in a stirrer to obtain mixed pulp; 3) adding a sizing agent, a retention aid and water into the mixed pulp, uniformly stirring and mixing to obtain paper pulp, pouring the paper pulp into a paper machine for papermaking forming, and then performing squeezing dehydration and drying to obtain raw paper; and 4) adding the coating into a coating machine, uniformly coating the surface of raw paper with the coating, and then drying and calendaring to obtain the coated paper. Strong hydrogen-bond interaction is formed betweenthe modified calcium carbonate filler and paper pulp fibers so that the strength of the coated paper is prevented from being reduced due to the fact that the raw paper is filled with calcium carbonate.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a preparation method of calcium carbonate-filled high-strength coated paper. Background technique [0002] Coated paper is coated with a layer of paint on the base paper, so that the paper has good optical properties and printing performance, etc. Its main uses are: printing magazines, book publishing paper and printing paper for trademarks, packaging, catalogs, etc. Coated paper can be roughly divided into art paper coated paper, light weight coated paper and the like. Simply speaking, the manufacture of coated paper refers to coating the base paper with paint, and then using a calender to smooth its surface after drying. Therefore, base paper and paint are important factors affecting the quality of coated paper. With a coating weight of 20g / m 2 Take the coating layer as an example, assuming that the dry specific gravity of the coating is 1.5, the thickness of the coating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/00D21H17/35D21H17/67D21H19/10D21H21/08D21H21/10D21H21/12D21H21/16D21F9/00C09C1/02C09C3/06C09C3/10
CPCC01P2006/21C09C1/021C09C3/006C09C3/063C09C3/10D21F9/00D21H11/00D21H17/35D21H17/675D21H19/10D21H21/08D21H21/10D21H21/12D21H21/16
Inventor 董海强
Owner 董海强
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