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Special spherical calcium carbonate for stone paper and preparation method of special spherical calcium carbonate

A calcium carbonate and stone paper technology, applied in the field of stone paper, can solve the problems of stone paper surface coating, printing difficulties, reduce the strength and stiffness of stone paper, and limit the uniformity, so as to achieve good processing fluidity and powder shedding Overcome, high smoothness effect

Active Publication Date: 2015-04-29
JIANGSU XIYI HIGH NEW DISTRICT TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of stone paper preparation, since the inorganic powder content accounts for more than 80%, the fluidity is greatly reduced, and the dispersion becomes more and more difficult, which leads to limited uniformity during extrusion and calendering of the T-type touch head.
Although the use of excessive lubricating aids can make up for the poor fluidity of stone paper processing, the surface coating and printing of stone paper are difficult due to excessive use of lubricating aids
Especially the use of excessive lubricating additives in stone paper directly reduces the strength and stiffness of stone paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Select calcite-type calcium carbonate with a particle size distribution of 98% from 200 mesh to 400 mesh, mix it with water to form a 30-40% slurry, add sodium hexametaphosphate with a mass of 0.5% of calcium carbonate as a dispersant, and use granular Diameter is the zirconia microbead of 2-4mm, grinds 5 minutes in the grinder, obtains particle diameter and is 1250 mesh spherical fine calcium carbonates;

[0030] (2) Send the spherical fine calcium carbonate slurry obtained in step (1) into the high-pressure expansion fluid device, pressurize the slurry, and make the liquid penetrate to the surface of the spherical fine calcium carbonate under the pressure condition of 40MPa, and keep the pressure for 3 Minutes, when the liquid penetrates into the surface of spherical fine calcium carbonate, and then quickly releases the pressure, the energy accumulated on the surface of spherical calcium carbonate expands due to rapid release, thereby forming micropores on the surf...

Embodiment 2

[0035] (1) Select calcite-type calcium carbonate with a particle size distribution of 98% from 200 mesh to 400 mesh, mix it with water to form a 30-40% slurry, add sodium hexametaphosphate with a mass of 0.5% of calcium carbonate as a dispersant, and use granular Zirconia microbeads with a diameter of 2-4mm were ground in a grinder for 10 minutes to obtain spherical fine calcium carbonate with a particle diameter of 2000 meshes;

[0036](2) Send the spherical fine calcium carbonate slurry obtained in step (1) into the high-pressure expansion fluid device, pressurize the slurry, and make the liquid penetrate to the surface of the spherical fine calcium carbonate under the pressure condition of 4560MPa, and keep the pressure for 5 Minutes, when the liquid penetrates into the surface of spherical fine calcium carbonate, and then quickly releases the pressure, the energy accumulated on the surface of spherical calcium carbonate expands due to rapid release, thereby forming micropor...

Embodiment 3

[0041] (1) Select calcite-type calcium carbonate with a particle size distribution of 98% from 200 mesh to 400 mesh, mix it with water to form a 30-40% slurry, add sodium hexametaphosphate with a mass of 0.5% of calcium carbonate as a dispersant, and use granular Diameter is the zirconia microbead of 2-4mm, grinds 15 minutes in the grinder, obtains particle diameter and is the spherical fine calcium carbonate of 1250-2500 mesh;

[0042] (2) Send the spherical fine calcium carbonate slurry obtained in step (1) into a high-pressure expansion fluid device, pressurize the slurry, and make the liquid penetrate to the surface of the spherical fine calcium carbonate under a pressure of 60 MPa, and keep the pressure for 3 Minutes, when the liquid penetrates into the surface of spherical fine calcium carbonate, and then quickly releases the pressure, the energy accumulated on the surface of spherical calcium carbonate expands due to rapid release, thereby forming micropores on the surfa...

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Abstract

The invention discloses special spherical calcium carbonate for stone paper and a preparation method of the special spherical calcium carbonate and provides spherical calcium carbonate which has the good liquidity in a heated state. The spherical calcium carbonate is formed by polymerizing caprolactam after the caprolactam infiltrates into micro-pores in the spherical calcium carbonate surface. A liquid infiltrates into the spherical tiny calcium carbonate surface under the action of high-pressure push of a high-pressure expansion fluid device, and energy accumulated on the spherical tiny calcium carbonate surface is released and expanded quickly due to sudden pressure release, so that the micro-pores are formed in the calcium carbonate surface, and spherical heavy calcium carbonate of the micro-pores in the surface adsorbs the caprolactam and is polymerized to form the spherical calcium carbonate with a caprolactam polymer inlaid in the surface. When the spherical calcium carbonate is used for processing raw materials of the stone paper, the processing fluidity and the dispersity of the stone paper are substantially improved due to the spherical characteristic of the calcium carbonate and the easy-plasticizing characteristic of the caprolactam polymer, and the good processing fluidity of the stone paper can be realized under the condition that a lubrication additive is reduced or not used.

Description

technical field [0001] The invention relates to the field of stone paper, and specifically provides a spherical calcium carbonate that can be used for stone paper and a preparation method thereof. Background technique [0002] Cai Lun's technology of using plant fiber to make paper is an outstanding invention in the history of human civilization. The appearance of paper has brought great convenience to human life and study. Papermaking technology has almost reached the point of perfection after continuous transformation and development. However, with the extensive application of paper in packaging and other fields, the demand is increasing, and the production needs to consume a large amount of forest resources and generate a large amount of waste water. Therefore, the technical aspect of utilizing plant fiber to make paper is leading a severe challenge. [0003] In order to get rid of the dependence of papermaking on plant fiber papermaking and eliminate the waste water d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K7/18C08K3/26C08L23/06C08L67/02C08L23/12C08L25/06
CPCC01F11/18C08G69/16C08K3/26C08K7/18C08K9/04C08L77/02
Inventor 陈庆曾军堂
Owner JIANGSU XIYI HIGH NEW DISTRICT TECH DEV CO LTD
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