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Journal articles
Open Access
Examination of the potential to reduce water application rates in pine wet decks, TAPPI JOURNAL October 2015

Examination of the potential to reduce water application rates in pine wet decks, TAPPI JOURNAL October 2015

Journal articles
Magazine articles
Open Access
Comparative study of guar gum and its cationic derivatives as pre-flocculating polymers for PCC fillers in papermaking applications, TAPPI Journal April 2022

ABSTRACT: In this work, gums from guar seeds were evaluated as a potential precipitated calcium carbonate (PCC) filler pre-flocculant to induce functional filler in papermaking applications. In recent years, guar has been conidered one of the promising wet-end additives due to its abundance, rich source of hemicellulose content, and bio-degradability. However, application of guar gum in filler pretreatment methods for producing high ash paper has scarcely been reported. In this paper, the flocculating ability of three types of guar gum was established with charge analysis and turbidity (NTU) of the system at 1% and 5% for each gum: native gum (NG) having a degree of substitution (DS) of 0, and cationic gums having a DS value of 0.07 (CL) and 0.15 (CH). It was interesting to observe that even at a 5% dose of G, the charge density of PCC did not deviate much from the initial values. The system carried a weak negativeharge, resulting in an unstable colloidal suspension that led to PCC-PCC particle bridging. On the other hand, the operative mechanism of CL and CH during adsorption and PCC flocculation was predicted to be charge neutralization and electrostatic-patch formation, accompanied by particle bridging. Note that CL, with a maximum 47.5% eduction in residual turbidity of PCC at a 1% dose, was much more efficient in doing so than the other two gums; NG had a 40% maximum reduction in residual turbidity at a 5% dose and CH had a maximum 30% reduction at a 1% ose. Later on, floc formation and structure were correlated with optical and field emission scanning electron microscopy (FE-SEM) images. In the next set of trials, paper properties were determined by varying the different gum dosages from 0.2% to 5% at a constant dose of 20% filler. It is also noteworthy to mention that with 1% CL (low DS) dose, PCC retention increased by 39%, which also enhanced the tensile, tear, burst, and opacity properties by 11%, 19%, 5%, and 4.4%, respectively, without significantly affecting the bulk properties. Further, wide-angle X-ray diffraction (XRD) analysis nd Fourier transform infrared (FTIR) analysis revealed that pre-flocculating PCC with a 1% gum dose did not induce any change in crystalline transformation. Based on observation, it was found that cationic gums with low DS values re a better choice for maximizing the strength of paper while maintaining bulk and high opacity when pre-flocculaion is adopted to increase the filler retention in paper.

Journal articles
Magazine articles
Open Access
The Creep Properties of Paper, TAPPI Journal August 2022

ABSTRACT: The creep proprties of alpha-pup handshetts were determined at various constant tensile loads and relative humidities for the purpose of clarifying the prerupture mechanical behavior of paper.

Journal articles
Magazine articles
Open Access
Editorial: The changing face of the coated paper industry, TAPPI JOURNAL January 2018

Editorial: The changing face of the coated paper industry, TAPPI JOURNAL January 2018

Journal articles
Magazine articles
Open Access
Contrasting underlying mechanisms of different barrier coating types, TAPPI Journal January 2018

Contrasting underlying mechanisms of different barrier coating types, TAPPI Journal January 2018

Journal articles
Magazine articles
Open Access
Print quality of flexographic printed paperboard related to coating composition and structure, TAPPI Journal January 2018

Print quality of flexographic printed paperboard related to coating composition and structure, TAPPI Journal January 2018

Journal articles
Open Access
Influence of fines on sheet delamination in condebelt drying and recyclability of condebelt-dried linerboard, TAPPI JOURNAL, June 2003, Vol. 2(6) (158KB)

Influence of fines on sheet delamination in condebelt drying and recyclability of condebelt-dried linerboard, Solutions! & TAPPI JOURNAL, June 2003, Vol. 2(6) (158KB)

Journal articles
Open Access
Evaluation of a laser-optical resin particle counter, Solutions! & TAPPI JOURNAL, March 2003, Vol. 2(3) (239KB)

Evaluation of a laser-optical resin particle counter, Solutions! & TAPPI JOURNAL, March 2003, Vol. 2(3) (239KB)

Journal articles
Open Access
Application of yellowing inhibitors to improve the brightness stability of coated mechanical papers, TAPPI JOURNAL, May 2003, Vol. 2(5) (195KB)

Application of yellowing inhibitors to improve the brightness stability of coated mechanical papers , Solutions! & TAPPI JOURNAL, May 2003, Vol. 2(5) (195KB)

Journal articles
Open Access
Modeling coating structure development using a monte carlo deposition method part 2: validation of the model and case study, TAPPI JOURNAL, May 2003, Vol. 2(5) (262KB)

Modeling coating structure development using a monte carlo deposition method part 2: validation of the model and case study, TAPPI JOURNAL, May 2003, Vol. 2(5) (262KB)

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