Process for manufacturing calcium carbonate composite fiber and uses thereof

A composite fiber and a manufacturing method technology are applied in the manufacture of calcium carbonate composite fibers and the field of calcium carbonate composite fibers, which can solve the problems of low retention rate of calcium carbonate fillers, improve paper quality, increase retention rate, and increase binding capacity. Effect

Inactive Publication Date: 2009-07-29
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems existing in the existing calcium carbonate filler filling method, the object of the invention is to provide a preparation method of calcium carbonate composite fiber and its application in the paper producti

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Soak 30g of the high-yield slurry BCTMP in a calcium hydroxide solution with a concentration of 12%. The calcium hydroxide solution is 72g. The temperature of the system is controlled at 30°C, and the system is kept uniformly stirred at a low speed, and 1L of water is added to the system. The soaking time was 30 minutes, and then the mixed solution of BCTMP and calcium hydroxide was passed into the mixed solution containing CO 2 Flue gas with 25% gas, when the pH of the system drops to 7, stop the reaction, and filter with a 200-mesh sieve to obtain calcium carbonate composite fibers. Then use 20% NBKP, 40% LBKP, 20% calcium carbonate composite fiber for compounding quantitative 70g / m 2 Paper, on the premise of increasing the ash content of the paper by 2%, compared with the traditional filling method to increase the ash content of the paper by 2%, the physical properties of the paper are equivalent, and the ash retention is increased from 53.2% to 57.3%; compared with ...

Embodiment 2

[0025] Soak 35g of high-yield pulp APMP dry in 12% calcium hydroxide solution. The calcium hydroxide solution is 80g. , the soaking time is 45 minutes, and then pass into the mixed solution of APMP and calcium hydroxide containing CO 2 Flue gas with 25% gas, when the pH of the system drops to 6.8, the reaction is terminated, and the calcium carbonate composite fiber is obtained by filtering with a 200-mesh sieve. Then use 20% NBKP, 40% LBKP, 20% calcium carbonate composite fiber for compounding quantitative 60g / m 2 Paper, on the premise of increasing the ash content of the paper by 1.7%, compared with the traditional filling method to increase the ash content of the paper by 2%, the physical properties of the paper are equivalent, and the ash retention is increased from 51.3% to 56.3%; compared with no measures taken , the same quantification, the ash content is 2% lower than the paper, and the physical properties of the paper are equivalent. The system retains filtered wate...

Embodiment 3

[0027] Soak high-yield slurry BCTMP and APMP (each 50%) dry 30g in the calcium hydroxide solution that concentration is 12%, and calcium hydroxide solution is 72g, and system temperature is controlled at 40 ℃, and keeps uniform stirring at low speed, and Add 1L of water to the system, soak for 60 minutes, and then inject CO2 into the mixed solution of BCTMP&APMP and calcium hydroxide 2 Flue gas with 25% gas, when the pH of the system drops to 6.5, the reaction is terminated, and the calcium carbonate composite fiber is obtained by filtering with a 200-mesh sieve. Then use 20% NBKP, 40% LBKP, 20% calcium carbonate composite fiber for compounding quantitative 80g / m 2 Paper, on the premise of increasing the ash content of the paper by 2%, compared with the traditional filling method to increase the ash content of the paper by 2%, the physical properties of the paper are equivalent, and the ash retention is increased from 53.3% to 58.3%; compared with no measures taken , the same...

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Abstract

The invention discloses a method for preparing calcium carbonate composite fibers and application in paper making. The calcium carbonate composite fibers are prepared by the following steps: after high-yield pulp and calcium hydroxide solution are soaked for 0.5-2 hours, the fibers are fully moistened and expanded, cell cavities are moistened and expanded, part of the calcium hydroxide solution permeates into the fiber cell cavities, then CO2 mixed gas is introduced into the solution, and the reaction is ended to generate the calcium carbonate composite fibers when pH of the system is reduced to 6-7. The prepared calcium carbonate composite fibers can be compounded with NBKP and LBKP to maintain quality of paper when the calcium carbonate composite fibers are promoted to have at least 3 percent of paper ash content. The application of the calcium carbonate composite fibers in a pulp mill or a paper mill has unprecedented significance.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and relates to a technology for manufacturing calcium carbonate composite fibers, in particular, a method for manufacturing calcium carbonate composite fibers and its application in the paper production process. Background technique [0002] As papermaking technology continues to develop, fillers have become the basic raw material for all types of paper, and this material now represents the largest non-fibrous component of paper when expressed by mass. As the large-scale acid papermaking has changed to alkaline papermaking, calcium carbonate (PCC) has also been used as a filler in papermaking on a large scale. [0003] The application of calcium carbonate filler improves most of the properties of the paper: 1) fills the gaps of the paper and improves the structure of the paper; 2) improves the surface properties of the paper such as whiteness, opacity and gloss; 3) improves the paper's Print...

Claims

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Application Information

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IPC IPC(8): D21C9/00D21H17/70
Inventor 王仁荣
Owner GOLD EAST PAPER JIANGSU
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