Paper chemistry

Oliveira, Marcius H. de; Tejado, Alvaro; Ven, Theo G. M. van de

doi:10.3183/npprj-2009-24-02-p141-147

Cited by 6 publications

(2 citation statements)

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“…When the CCW-filled paper was likewise subjected to tensile force, the bonding force of fibers decreased, but the strength of paper increased due to the friction between fibers and the entanglement between fibers and CCW fillers. In contrast to CCW, PCC with nearly round shape hindered fiber-fiber bonding (Xu et al 2005;de Oliveira et al 2009) and decreased fiberfiber contact area, as shown in Fig. 14(a).…”

Section: Mechanism Modelmentioning

confidence: 97%

Using calcium carbonate whiskers as papermaking filler

Chen

Qian

2011

BioRes

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Whiskers, having large length/diameter ratio, are fiber-shaped single crystals. The technical possibility of using calcium carbonate whiskers as papermaking filler to replace conventional powder-like calcium carbonate was investigated. The results showed that it may be feasible to use calcium carbonate whisker as papermaking filler. Compared with conventional precipitated calcium carbonate, calcium carbonate whisker had higher retention efficiency. The use of calcium carbonate whisker also favorably affected the strength properties of paper sheets. A model was proposed to suggest the mechanism for paper strength improvement. The whiskers filled in paper sheets could increase the friction between fibers, thus increasing bonding strength. Moreover, the strength properties of paper were further improved because calcium carbonate whiskers were partly embedded in pulp fiber walls.

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Section: Mechanism Modelmentioning

confidence: 97%

Using calcium carbonate whiskers as papermaking filler

Chen

Qian

2011

BioRes

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“…In addition to studies that describe the influence of beating on dewatering and strength (Berger and Schramm 2011;da Silva et al 1982;Kibblewhite 1973;Lindqvist 2013;Lindqvist et al 2011Lindqvist et al , 2012Lindström and Kolman 1982;Pikulik 1997), there is an extensive body of research papers on dewatering chemicals and the use of mineral fillers (Alince et al 2006;de Oliveira et al 2009;Esser et al 2008;Gärdlund et al 2003;Hua et al 2011;Lindqvist et al 2009;Pikulik 2000;Sutman 2011;Szeiffova and Alince 2003). Furthermore, the sheet structure and the fiber orientation is largely determined by the condition in the headbox and forming section.…”

Section: Sheet Formingmentioning

confidence: 99%

Initial wet web strength of paper

Belle

Odermatt

2016

Cellulose

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Despite much research into and development within the complex area of the initial wet web strength of paper, no complete model has yet been developed to describe this property. This type of paper strength is the most important property to ensure an effective paper machine run. Furthermore, the process of strength development in the sheet forming and pressing portion of the process is the basis of the final paper strength. Recent investigations have focused on the surface interactions of fibers on the molecular level. There have also been several innovative findings about fiber swelling and the impact of swelling on the mechanical characteristics of fibers in wet conditions. Overall, progress obtained using new methodologies enables a deeper understanding of the mechanism of strength development. This review discusses these important areas by examining the literature and the authors' own work to obtain a better understanding of the strength development in wet paper webs. This paper highlights that the fiber morphology and the dryness of the wet web have the greatest impact on the strength of the wet web. As fiber sources and machinery are fixed, the fiber water gel is one of the easiest factors to adjust via the process water quality and the use of chemical additives.

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Why does paper get stronger as it dries?

Tejado

Ven

2010

Materials Today

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Paper chemistry

Cited by 6 publications

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Using calcium carbonate whiskers as papermaking filler

Using calcium carbonate whiskers as papermaking filler

Initial wet web strength of paper

Why does paper get stronger as it dries?

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