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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
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Journal DOI :
Korea Technical Association of the Pulp and Paper Industry
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Volume & Issues
Volume 41, Issue 5 - Dec 2009
Volume 41, Issue 4 - Dec 2009
Volume 41, Issue 3 - Sep 2009
Volume 41, Issue 2 - Jun 2009
Volume 41, Issue 1 - Mar 2009
Selecting the target year
Oxidized Acetate Starch as a New Surface Sizing Agent
Zhang, Guang-Hua ; Lai, Zhi-Chao ; Li, Hui ; Wang, Zhou-Ni ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 5, 2009, Pages 1~7
Oxidized acetate starch was synthesized from corn oxidized starch and vinyl acetate. The sizing concentration and degree of substitution of modified starch on surface strength, smoothness and water resistance of the paper have been studied. The results showed that the surface strength, smoothness and other properties of paper sized by oxidized acetate starch is better than that of oxidized starch. When the degree of substitution of modified starch is from 0.04 to 0.14, the properties of paper sized by oxidized acetate starch have been improved more effectively.
Evaluation Methods for Flat Crush Resistance of Corrugated Fiberboard with Microflutes
Youn, Hye-Jung ; Kwon, Hyun-Seung ; Lee, Hak-Lae ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 5, 2009, Pages 8~14
Corrugated fiberboard is a widely used packaging material because of its high compressive strength and stiffness despite light weight. Corrugated fiberboards with microflutes with height
1.5 mm, such as E, F or G, have been developed. As microflutes have a different geometry from other conventional flutes, they may behave differently in testing and require a new testing method. Therefore, we evaluated the flat crush resistance of corrugated fiberboard with microflutes according to the ISO and TAPPI standard test methods. In addition, the effects of specimen area and platen compression rate were examined. The goal of this study was to identify an appropriate method for flat crush test (FCT) of corrugated fiberboard with microflutes. When a test piece with a standard area was subjected to the FCT in accordance with ISO and TAPPI methods, microflute corrugated fiberboard demonstrated a different load-displacement curve. An area of 20
was determined to be the most appropriate for FCTof microflute corrugated fiberboard.
Monosaccharides from industrial hemp (Cannabis sativa L.) woody core pretreatment with ammonium hydroxide soaking treatment followed by enzymatic saccharification
Shin, Soo-Jeong ; Han, Sim-Hee ; Park, Jong-Moon ; Cho, Nam-Seok ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 5, 2009, Pages 15~19
Ammonia soaking treatment was introduced for hemp woody core pretreatment to increase enzymatic saccharification of polysaccharides. Portions of the xylan, cellulose, and lignin were removed by aqueous ammonia soaking, which improved the enzymatic saccharification of cellulose and xylan. Following ammonia soaking, 37% (
-6 day treatment) to 61% (
-16 h treatment) of the cellulose was converted to glucose and 33% (
-6 day treatment) to 48% (
-16 h treatment) of the xylan to xylose. Cellulose responded better to enzymatic saccharification than did xylan after the ammonia soaking treatment. Aqueous ammonia soaking pretreatment was more effective than electron beam irradiation for increasing enzymatic saccharification of xylan and cellulose in hemp woody core.
Impact of Residual Extractives in Kraft Pulps on Brightness and Color
Shin, Soo-Jeong ; Sung, Yong-Joo ; Park, Jong-Moon ; Cho, Nam-Seok ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 5, 2009, Pages 20~25
Residual extractives had a noticeable impact on the brightness of unbleached hardwood kraft pulps (trembling aspen). The brightness-impacting extractives were effectively removed by oxygen delignification. In addition, oxygen delignification was more effective in removing chromophores in hardwood unbleached kraft pulps than in those of softwood (loblolly pine). The residual extractives in unbleached hardwood kraft pulps also affected the pulp color, primarily redness and the L value. These redness-related extractives in unbleached hardwood kraft pulps were also effectively removed by oxygen delignification. There were no significant color differences between untreated and solvent-extracted oxygen-delignified aspen kraft pulps. The residual extractives in unbleached and oxygen-delignified softwood (loblolly pine) kraft pulps did not have a significant impact on either brightness or pulp color.
Morphology of Nanocelluloses and Micro-sized Cellulose Fibers Isolated by Acid Hydrolysis Method
Cho, Mi-Jung ; Park, Byung-Dae ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 5, 2009, Pages 26~32
As a part of utilizing the nanocellulose (NC) from lignocellulosic components of wood biomass, this paper reports preliminary results on the products of sulfuric acid hydrolysis. The purpose of this study was to investigate the morphology of both NC and micro-sized cellulose fiber (MCF) isolated by acid hydrolysis from commercial microcrystalline cellulose (MCC). Field emission.scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) were employed to observe the acid hydrolysis suspension, NC, and MCF. The electron microscopy observations showed that the acid hydrolysis suspension, before separation into NC and MCF by centrifugation, was composed of nano-sized NCs and micro-sized MCFs. The morphology of isolated NCs was a whisker form of rod-like NCs. Measurements of individual NCs using TEM indicated dimensions of 6.96
0.87 nm wide by 178
55 nm long. Observations of the MCFs showed that most of the MCC particles had de-fibered into relatively long fibers with a diameter of 3-9
, depending on the degree of acid hydrolysis. These results suggest that proper technologies are required to effectively realize the potentials of both NCs and MCFs.
Improvements in the Physical Properties of Hanji by Using Red Algae Pulp
Seo, Yung-Bum ; Kim, Young-Wook ; Lee, Min-Woo ; Jung, Sun-Young ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 5, 2009, Pages 33~37
Hanji is a traditional Korean handmade paper, made of bast fibers of the paper mulberry. Its fiber furnish is much more expensive than wood fiber furnish. Hanji with a low basis weight requires additional opacity and smoothness for better writing and printing. Filler such as calcium carbonate can not be used to raise the opacity of Hanji because of its low retention in low basis weight paper and the high freeness of the Hanji fiber furnish. Addition of red algae pulp, which is prepared from marine red algae to the Hanji fiber furnish negated retention problems happening in the case of mineral filler addition, and produced a substantial improvement in the opacity and smoothness of Hanji. The higher retention was due to the much larger size of the red algae fibers compared to the mineral fillers. The improvement in opacity and smoothness were also due to the shape of the red algae fibers: that red algae fibers are narrower in widths and shorter in lengths than wood fibers results in increased surface area and smoothness.
Development of a Conservation Corrugated Box for Storage of Document Archives
Seo, Yung-Bum ; Shin, Jong-Soon ; Kim, Hyung-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 5, 2009, Pages 38~43
A conservation corrugated box for storing document archives was developed. The specifications of the double-walled E-flute corrugated conservation box were modified from those of the Library of Congress, USA. The Photographic activity test (PAT) of ISO 18916 was used to ensure protection of the archival contents from adverse effects of the container itself. Accelerated aging was conducted to evaluate the conservative properties of the box components. Atomic force microscopy was also used to evaluate changes in the cellulose surface due to accelerated aging.
Characteristics of White Water from Enzyme Deinking process for ONP at Low Alkalinity
Eom, Tae-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 5, 2009, Pages 44~49
Old newspaper was deinked using commercial cellulolytic enzymes and a surfactant complex at low alkalinity. The properties of the deinked pulp(DIP) were evaluated and the suspended solids content, cationic demand, turbidity, and chemical oxygen demand(COD) of the process water were measured. The results can summarized as follows, 1. The brightness and yield of the DIP were improved using enzymatic surfactant complex deinking. 2. The amount of foaming during deinking with the enzyme surfactant complex was higher than that with synthetic surfactant deinking. However, it was not sufficient to cause process problem. 3. The pH and turbidity of the white water from deinking with the enzyme surfactant complex were similar to those of the white water from surfactant deinking. 4. The suspended solids content, cationic demand, and COD of the white water from deinking with the enzyme surfactant complex were improved compared to those of the white water from surfactant deinking.
Systematic Analysis of Periodic Variation in Paper Structure
Sung, Yong-Joo ; Keller, D.Steven ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 5, 2009, Pages 50~58
Periodic variation of local paper structure was evaluated using two-dimensional fast Fourier transform (FFT) and spectral analysis. Since the periodic variation could originate from various sources and have different magnitudes and patterns depending on the origins, a complete analysis of local paper structure properties such as local grammage, local thickness, local apparent density and surface topography was proposed in this study. For a commercial copy paper, the individual periodic patterns for each local structural property were identified by using inverse FFT spectrums of the filtered spectrum. The spectral analysis of newsprint sample provided the period of variation quantitatively, which was useful in comparing the origins of the individual periodic patterns of the local structural properties.
Kinetics of Oil-Proof Agent Adsorption onto Cellulose Fibers
Zhu, Hongxiang ; Honghu, Zeng ; Wang, Shuangfei ; Lee, Hak-Lae ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 5, 2009, Pages 59~65
Adsorption of an oil-proof agent (OPA）onto cellulose fibers during the papermaking process was investigated using UV-Vis spectrophotometry by measuring the OPA concentration decrease in the solution. From the calibration curve, the spectrum were converted to chemical concentrations in solution, from which the amount adsorbed onto the fiber surface could be determined. Thus, it was possible to determine the total amount adsorbed onto the fibers and in solution. Using this approach, we studied the adsorption behavior of the OPA onto the fiber surface and derived its,
. The values of the parameters kaand
were determined using a mathematic model based on a mass transfer equation. Ultimately, a complete was derived: