Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process for manufacturing calcium carbonate composite fiber and uses thereof

A composite fiber and manufacturing method technology, applied in fiber raw material processing, cellulose pulp post-processing, papermaking, etc., can solve the problems of low retention rate of calcium carbonate filler, improve paper quality, increase binding ability, and reduce production costs Effect

Inactive Publication Date: 2010-12-29
GOLD EAST PAPER JIANGSU
View PDF5 Cites 0 Cited by
  • 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 production process. Under the premise of improving the calcium carbonate filler consumption, the present invention can Paper quality does not decline; and overcomes the problem of low retention rate of calcium carbonate filler in the current filling method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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 reducedto 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D21C9/00D21H17/70
Inventor 王仁荣
Owner GOLD EAST PAPER JIANGSU
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com