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Modified calcium carbonate filler and preparation method and application thereof in wet-strength paper

A technology of calcium carbonate filler and wet-strength paper, which is applied in the directions of fibrous filler, reinforcing agent addition, inorganic compound addition, etc., can solve the problems of inability to meet wet-strength paper, reduce paper dry strength and wet strength, etc., and improve the surface of paper. performance and optical properties, increasing the ash content of paper, increasing the effect of filler content

Inactive Publication Date: 2014-02-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since wet strength paper has higher strength requirements for paper, the addition of fillers will reduce the dry strength and wet strength of paper. The existing fillers cannot meet the requirements of wet strength paper production, so that the existing wet strength paper production is more Produced from 100% chemical pulp without adding any fillers

Method used

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  • Modified calcium carbonate filler and preparation method and application thereof in wet-strength paper
  • Modified calcium carbonate filler and preparation method and application thereof in wet-strength paper
  • Modified calcium carbonate filler and preparation method and application thereof in wet-strength paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First disperse the precipitated calcium carbonate in water, the concentration is 50% (mass percentage), then add PAE (polyamide polyamine epichlorohydrin) diluted with water to 0.5% concentration, the amount of PAE is relative to the absolute dry weight of the precipitated calcium carbonate Stir for 90 minutes under the condition of 500r / min, and then add a low molecular weight cationic polyacrylamide reinforcing agent with a molecular weight of 800,000. Minutes, the modified calcium carbonate filler is prepared, placed in the storage tank, and stirred at 300r / min for later use.

Embodiment 2

[0029] First the precipitated calcium carbonate is dispersed in water, the concentration is 40% (mass percentage), then add PAE (polyamide polyamine epichlorohydrin) diluted to 0.8% concentration with water, the consumption is 20% (relative to the precipitated calcium carbonate absolute Dry mass ratio), stirred at 300r / min for 80 minutes, then added a low-molecular-weight cationic polyacrylamide reinforcing agent with a molecular weight of 1.2 million, in an amount of 0.6% relative to the dry mass of precipitated calcium carbonate, and stirred at 200r / min for 30 minutes. The prepared modified calcium carbonate is placed in a storage tank and stirred at 300r / min for subsequent use.

Embodiment 3

[0031] First the precipitated calcium carbonate is dispersed in water, the concentration is 20% (mass percentage), then add PAE (polyamide polyamine epichlorohydrin) diluted to 2% concentration with water, the consumption is 25% (relative to the precipitated calcium carbonate absolute Dry mass ratio), stirring at 150r / min for 60 minutes, then adding a low molecular weight cationic polyacrylamide reinforcing agent with a molecular weight of 1.8 million, in an amount of 0.8% relative to the dry mass of precipitated calcium carbonate, stirring at 200r / min for 30 minutes. The prepared modified calcium carbonate is placed in a storage tank and stirred at 300r / min for subsequent use.

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Abstract

The invention discloses a preparation method and application of modified calcium carbonate for high-filling wet-strength paper. The preparation method comprises the following steps of: dispersing precipitated calcium carbonate in water, controlling the mass concentration between 20% and 50%, stirring, and then adding polyamide polyamine epichlorohydrin of the mass concentration of 0.2 to 2% obtained by being diluted with water, wherein the amount of the polyamide polyamine epichlorohydrin is 1 to 25% of the dry mass of the precipitated calcium carbonate; and stirring for 30 to 120 minutes at 150 to 500r / min, adding a low molecular weight cationic polyacrylamide enhancer with a molecular weight of 0.8 to 2 million, and stirring to obtain a modified calcium carbonate filler. The filler is used for producing the high-filling wet-strength paper, thereby obtaining better retention, dry strength, wet strength, and sizing degree. According to the preparation method and the application, the process is simple, the application is convenient, the problems that the high-filling wet-strength paper has poorer dry and wet strength, low filler retention and sizing impediment can be better solved, and the cost of production enterprises is reduced.

Description

technical field [0001] The invention relates to a modified calcium carbonate filler, in particular to a modified calcium carbonate filler, a preparation method thereof and an application in wet strength paper. Background technique [0002] With the improvement of people's living standards, the requirements for the use of paper are getting higher and higher, and the use range and output of wet strength paper are also increasing. Wet strength paper refers to the paper that still maintains more than 15% of the dry strength and can resist cracking or dissociation when the paper is damp or soaked in water. It is widely used in household paper, fruit bag paper, printing paper, recording paper and banknote paper with wet strength requirements. [0003] For ordinary paper, the optical properties such as opacity and whiteness of the paper can be better improved by adding fillers, and the physical properties such as smoothness and surface roughness of the paper can be improved at the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/02C09C3/10D21H21/20D21H17/69
Inventor 杨飞陈克复杨仁党李军莫立焕冯郁成徐峻
Owner SOUTH CHINA UNIV OF TECH
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