The effect of pre-flocculation of lime mud by wet-end additives on paper properties

Peng, Yuan; He, Beihai; Zhao, Lihong

doi:10.3183/npprj-2015-30-02-p243-249

Cited by 9 publications

(2 citation statements)

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“…This resulted in the improvement of the strength of the laminated paper. In the paper industry, the use of filler with board particle size distribution (Velho 2002) such as GCC, or application of pre-flocculation of fillers (Peng et al 2015), can also enhance the packing ability of fillers and endow the paper with better strength. In contrast, when filler distribution became uniform in the z-direction, the paper strength could be affected from two aspects.…”

Section: Strength Propertiesmentioning

confidence: 99%

A filler distribution factor and its relationship with the critical properties of mineral-filled paper

Song

Yuan

Zhang

et al. 2018

BioRes

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The use of mineral fillers in the paper industry has attracted much attention due to its low cost and ability to improve optical properties and printability. Besides the filler characteristics, paper properties, such as bulk, tensile, and opacity, are greatly affected by filler distribution in the z-direction. Therefore, optimization of filler distribution is an effective way to maximize the value of fillers. In this work, a filler distribution factor (Fc) was proposed to quantitatively describe the concentrated degree of filler distribution in the z-direction. The reduction in Fc resulted in an increase in paper bulk, porosity, and opacity, due to the generation of more interfaces between fibers and fillers. When filler particles were concentrated in one layer (Fc = 1), the tensile strength of the filled paper increased between 26 to 40% in comparison to the paper with various Fc values. For a given Fc, better tensile and opacity properties were achieved by increasing filler concentration on the surface layer of paper.

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Section: Strength Propertiesmentioning

confidence: 99%

A filler distribution factor and its relationship with the critical properties of mineral-filled paper

Song

Yuan

Zhang

et al. 2018

BioRes

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“…According to the different uses of paper, we can use a variety of methods to modify the filler (for example, chemical modification, physical modification and surface modification, etc.,) for acquiring the requirements of different paper and ultimately to improve the performance of the paper. [21][22][23][24][25]. In recent years, the surface modification of filler for improving the hydrogen bonding between fibers has been paying more and more attention [26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

New Diatomite Filler for Improvement of Paper Strength Properties

Shang¹,

Han²,

Liang³

2020

Rev. Chim.

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In this work, diatomite particles were modified to improve the bondability of diatomite particles with pulp fibers and filler retention via a complex of cationic starch-sodium hexametaphosphate coating method. The particle size, FTIR spectroscopy characteristic and morphology of the resulting modified diatomite were studied to confirm the successful modification. The SEM results illustrated that the surface of modified diatomite particles was covered by the complex coatings. The coating efficiency of the complex of cationic starch-sodium hexametaphosphate on diatomite surface was up to 98%. Compared with the handsheet filled unmodified diatomite, the handsheet filled with modified diatomite had higher strength properties and lower bulk. When cationic starch dosage was 7%, and filler dosage was 25% , the resulting tensile strength of filled modified diatomite handsheet was 22.1% higher than the handsheet filled unmodified diatomite. Furthermore, with the filler loading of 30%, compared with that of unmodified diatomite, filler retention of modified diatomite was increased by 20.4%. The larger particle size and higher zeta potential of modified diatomite were benefitial to increase retention of modified diatomite filler.

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Further understanding on the mechanism of alkyl ketene dimer sizing on the causticized calcium carbonate filled paper and its improvements

Jian

Dang

Duan

et al. 2016

Environ Sci Pollut Res

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Causticized calcium carbonate (CCC), a solid waste derived from kraft black recovery process, can be used as an alternative for the conventional precipitated calcium carbonate (PCC). However, the application of the CCC has been limited due to its low sizing efficiency in its filled paper. In this study, the characteristics of the CCC were studied aiming to improve the alkyl ketene dimer (AKD) sizing performances of the CCC filled papers, and the results were compared with those from PCC filled papers. The results showed that the CCC had higher pore structure, higher specific surface area, and more negative charge density than the PCC, thus leading to a higher cationic AKD adsorption onto the CCC filler. The lower AKD sizing efficiency in the CCC filled paper can be explained by the combination of higher AKD adsorption and migration, both of which resulted in preferred AKD adsorption onto/into the CCC fillers, rather than the cellulose fibers. Based on the above, the prior addition of polyamide-polyamine epichlorhydrin (PAE) resin to the CCC filler system was proposed to remedy the related issues, thus improving the sizing efficiency.

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The effect of pre-flocculation of lime mud by wet-end additives on paper properties

Cited by 9 publications

References 0 publications

A filler distribution factor and its relationship with the critical properties of mineral-filled paper

A filler distribution factor and its relationship with the critical properties of mineral-filled paper

New Diatomite Filler for Improvement of Paper Strength Properties

Further understanding on the mechanism of alkyl ketene dimer sizing on the causticized calcium carbonate filled paper and its improvements

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