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Refiner mechanical pulping of kenaf.

Mohta, Dinesh Chand.

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Refiner mechanical pulping of kenaf.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Refiner mechanical pulping of kenaf./
Author:	Mohta, Dinesh Chand.
Description:	161 p.
Notes:	Source: Dissertation Abstracts International, Volume: 61-11, Section: B, page: 5649.
Contained By:	Dissertation Abstracts International61-11B.
Subject:	Engineering, Chemical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ53740
ISBN:	0612537404

Refiner mechanical pulping of kenaf.
Mohta, Dinesh Chand.

Refiner mechanical pulping of kenaf. - 161 p.

Source: Dissertation Abstracts International, Volume: 61-11, Section: B, page: 5649.

Thesis (Ph.D.)--University of Toronto (Canada), 2000.

Kenaf (Hibiscus cannabinus), consisting of two fibrous components, long fiber bark and short fiber core, is being promoted because of its high fiber quality. The objective of this research is to analyze the fundamental aspects of kenaf refiner mechanical pulping (RMP) to provide scientific information on the behaviour of non-woods for newsprint production particularly in countries experiencing wood shortfall.

ISBN: 0612537404Subjects--Topical Terms:

1018531
Engineering, Chemical.

Refiner mechanical pulping of kenaf.
LDR:03200nmm 2200313 4500 001 1841492
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020 $a 0612537404
035 $a (UnM)AAINQ53740
035 $a AAINQ53740
040 $a UnM $c UnM
100 1 $a Mohta, Dinesh Chand. $3 1929788
245 1 0 $a Refiner mechanical pulping of kenaf.
300 $a 161 p.
500 $a Source: Dissertation Abstracts International, Volume: 61-11, Section: B, page: 5649.
500 $a Adviser: D. N. Roy.
502 $a Thesis (Ph.D.)--University of Toronto (Canada), 2000.
520 $a Kenaf (Hibiscus cannabinus), consisting of two fibrous components, long fiber bark and short fiber core, is being promoted because of its high fiber quality. The objective of this research is to analyze the fundamental aspects of kenaf refiner mechanical pulping (RMP) to provide scientific information on the behaviour of non-woods for newsprint production particularly in countries experiencing wood shortfall.
520 $a The data obtained from the refining of bark containing 22% core (bark22) at various consistencies and raw material soaking temperature indicate that the temperature had no effect on pulp properties except on the fibrization energy. Kenaf RMP properties indicate that the tear and burst indices are better than the kenaf thermomechanical pulp (TMP) as reported earlier. Bark22 RMP has shown better strength properties than black spruce RMP, while bark RMP is superior to black spruce TMP. Core refined separately provides a soft, bulky and poorly bonded sheet; thus core refining needs to be modified to enhance its papermaking properties. Strength and surface properties can be further improved if the percentage of unrefined core fibers and bundles are reduced considerably by modifying refiner plate pattern. Kenaf and bark22 pulps have shown high bleaching efficiency and can be bleached to the newsprint brightness level (around 65%) with small dosages of H2O2 and NaOH. The unique finding of this study is that the core fibers are protected when refined in the presence of bark fibers. It has also been observed that the fiber length is independent of refiner plate gaps.
520 $a Microscopic study indicates that the thick cell-walled bark fibers responded positively to bar actions to develop adequate papermaking properties. A relationship between fiber coarseness, and sheet density and stiffness provides a better understanding of wet fiber flexibility. It has been demonstrated that the lignin removal pattern and fiber surface analysis by X-ray photoelectron spectrophotometer explains fiber development during refining in a better way.
520 $a This study clearly shows that newsprint with adequate strength and optical properties can be produced from kenaf RMP, while bark RMP can be used for value-added applications e.g. lightweight-coated grade, because of its having strong papermaking properties.
590 $a School code: 0779.
650 4 $a Engineering, Chemical. $3 1018531
650 4 $a Agriculture, Wood Technology. $3 1031154
690 $a 0542
690 $a 0746
710 2 0 $a University of Toronto (Canada). $3 1017674
773 0 $t Dissertation Abstracts International $g 61-11B.
790 1 0 $a Roy, D. N., $e advisor
790 $a 0779
791 $a Ph.D.
792 $a 2000
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ53740