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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Korea Technical Association of The Pulp and Paper Industry
Journal Basic Information
Journal DOI :
Korea Technical Association of the Pulp and Paper Industry
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Volume & Issues
Volume 37, Issue 5 - Dec 2005
Volume 37, Issue 4 - Dec 2005
Volume 37, Issue 3 - Sep 2005
Volume 37, Issue 2 - Jun 2005
Volume 37, Issue 1 - Mar 2005
Selecting the target year
Screening of Microorganisms Secreted High Efficient Enzymes and Properties of Enzymatic Deinking for Old Newsprint(VI) -Characteristics of Cellulase and Xylanase from Fusarium pallidoroseum and Aspergillus niger-
Park Seong-Cheol ; Lee Yang-Soo ; Jeong In-Soo ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 37, issue 4, 2005, Pages 1~7
This study was carried out to investigate the characteristics of extracellular cellulase and xylanase from Fusarium pallidoroseum and Aspergillus niger, such as enzyme activity and stability by various pH, temperature and metal ions, for application into enzymatic deinking system. The optimal temperature and pH for enzyme activity and stability of Fusarium pallidoroseum and Aspergillus niger were
, pH 5.0 and
, pH 9.0, respectively. Certain metal ions, calcium and cobalt, brought to elevate cellulase and xylanase activity from F. pallidoroseum and A. niger. With these results we suggest that enzymatic deinking system should be proceed at
under their optimal pH condition.
Application of WCT (Wet Compaction Test) to Mixed Fiber Furnishes
Seo Yung B. ; Lee Chun Han ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 37, issue 4, 2005, Pages 8~17
WCT (Wet compaction test) is a new fiber evaluation method developed recently by Seo and its test results can be used as a predictor for pulp quality and its paper property Bleached chemical pulps (SwBKP, HwBKP), recycled pulp (OCC), and mechanical pulp (BCTMP) were used for the furnishes to be tested by WCT We compared the WCT results to conventional fiber evaluation tests such as WRV (Water Retention Value), free ness, and fiber length in this study, and found that WCT always gave better regression coefficients in relation to pulp quality (drainage), and paper properties (density, tensile, tear, and burst strength). WCT may be used on-line in papermachine.
High Consistency Pulping Treatment of Fractionated OCC Pulp for Improving Strength
Hur Young Dae ; Lee Sang Gil ; Lee Hak Lae ; Youn Hye Jung ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 37, issue 4, 2005, Pages 18~25
The mechanical strength is the prime requisite for linerboard and corrugating mediums. Repeatedly recycled OCC fibers show less suitable property for papermaking mostly due to hornification and reduced fiber length. To overcome these problems many researches including fractionation, enzymatic treatment, and chemical or mechanical treatments of fibers have been carried out. In this study, the effect of mechanical treatment by high consistency pulping on the characteristics of recycled fibers as well as mechanical properties of sheets were investigated. Results on the strength properties of handsheets made of recycled fibers that were treated to same freeness level by beating and high consistency pulping, respectively, showed that beating treatment was more efficient in improving strength. Drainage and recycling potential of the fibers treated by high consistency pulping, however, were expected to be superior to beating because fines content and fiber length didn't change significantly.
Study of paper Strengthening Properties with Polyvinylamine
Son, Dong-Jin ; Kim, Bong-Yong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 37, issue 4, 2005, Pages 26~31
The purpose of this study was to confirm paper strengthening properties with recently commercialized polyvinylamine. Because of its high cationic charge density, polyvinylamine has been investigated as a size retention and surface coating aids. In this study, we tried to confirm polyvinylamine as wet-end additives to improve dry and wet strength using LBKP and BCTMP pulps. As a result, we found improvement of dry and wet tensile properties of polyvinylamine with BCTMP were much better than LBKP condition. This phenomena could be explained that ionic bonding of cationic charge of polyvinylamine with abundant anionic substances of BCTMP was a very important factor to improve dry and wet strength of paper.
Influences of Wet-Pressing Types on Internal Structure of Paper
Lee Jin-Ho ; Park Jong-Moon ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 37, issue 4, 2005, Pages 32~37
To Increase the productivity of a paper machine, the maximization of the machine speed is a kind of simple way As the machine speed increases, more intense wet pressing is required to persist the outlet consistency of press part and reduce the water removal of dryer part. With more intense pressing, there are concerns that the quality of paper will be affected. This study was carried out to evaluate the influence of wet-pressing on internal structure of paper, The nip pressure at the first and third nip in triple nip press was controlled. Paper structures, strength properties and pore properties were evaluated. As a result, first nip pressure more strongly influenced the paper structural properties than third nip pressure in triple nip pressing condition. Because of the high water content and low wet-web strength of paper web in first nip, increasing the first nip pressure induced the incipient crushing of wet-web and then caused a potential of web break during the following coating or printing processes.
A Quantitative Analysis of Dissolved Starch in White Water by UV Spectroscopy
Jung So-Hyun ; Ryu Jeong-Yong ; Kim Hyoung-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 37, issue 4, 2005, Pages 38~43
Natural Com Starch(NCS) spray system has been widely used In multiply board mill for the better bonding strength between board layers. However the unsuitable NCS spray system could lead to a drop in plybond efficiency of multiply board. It could also result in the accumulation of unretained-starch in the white water system, which could not only rise in BOD and COD level but also reduce the effects of rosin-alum sizing system and other additives. In this study, the simple and rapid method by UV-spectroscopy for measuring the starch contents in the white water was proposed, and the quantitative analysis for dissolved starch content in white water was carried out in two kinds of board production process. It could be confirmed that about 150 ppm of oxidized starch was retained in white water dewatered from undertop ply of multiply board process, and about 470 ppm of natural starch was dissolved in white water originated from unsuitable spraying system in the multiply board production lines for cup base paper.
Optimization of Water Reuse Network Using Water Pinch Method in Duplex Board Mill
Ryu Jeong-Yong ; Park Dae-Sik ; Kim Yong-Hwan ; Song Bong-Keun ; Seo Yung-Bum ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 37, issue 4, 2005, Pages 44~51
Paper mills use and discharge lots of water. And so now the papermaking industry could be classified into major water consuming industry In order to analyze the process water network and to establish the mass, water balance of duplex board mill, computer aided simulation was made using water pinch method. Based on the pinch analysis results, reuse of process water, after regenerating by microfilter as much as
, could be suggested without significant accumulation of contaminants in process water. According to this suggestion about
of recycled process water could be sub stituted by regenerated water and consequently
of energy cost is expected to be reduced.
Printability Improvement of Hanji
Hyun Kyung-Su ; Kim Min-Jung ; Lee Myoung-Ku ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 37, issue 4, 2005, Pages 52~59
Most of printing paper market today have been occupied by western paper and some machine-made Hanji used don't show the characteristic advantages for traditional hand-made Hanji. Although hand-made Hanji has an aesthetic and qualitative value, it has limited uses because of poor printability as printing paper. Unlike western paper, conventional Hanji cannot be used as Printing paper because it is impossible to make the clear formation of printed dot and to develop a high level of sizing and picking problem occurs during printing. Improvements of physical and optical properties such as roughness, smoothness, air permeability, contact angle, opacity, and paper gloss as well as sizing level were accomplished through internal and surface sizing and calendering, which made the paper better suited for printing and decreased problems during printing.
A New Generation of Fluorescent Whitening Agents for Paper Coatings
Hunke B. ; Roick T. ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 37, issue 4, 2005, Pages 60~66
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 37, issue 4, 2005, Pages 67~72