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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 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
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Fundamental Study on Developing Lignocellulosic Fillers for Papermaking(II) - Effect of lignocellulosic fillers on paper properties -
Kim, Chul-Hwan ; Lee, Ji-Young ; Lee, Young-Rok ; Chung, Ho-Kyung ; Back, Kyung-Kil ; Lee, Hui-Jin ; Gwak, Hye-Joeng ; Gang, Ha-Ryun ; Kim, Sung-Ho ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 2, 2009, Pages 1~6
The purpose of this study was to investigate effects of lignocellulosic fillers made of wood powder and inorganic fillers, such as GCC and PCC, on physical properties of papers. Mechanical treatment and chemical treatment were carried out subsequently for generating lignocellulosic fillers, and then inorganic filler and wood powder were mixed together, and then mechanically treated for making lignocellulosic fillers covered with inorganic fillers. Consequently the particle size of lignocellulosic fillers was higher than that of inorganic fillers, which led to lumen loading and simultaneously surface coverage of fine inorganic fillers. Lignocellulosic fillers contributed to the increase of both bulk and opacity of handsheets dramatically, but some of properties including tensile strength, brightness and roughness decreased compared to inorganic fillers.
Effects of Refining and Blending of Pulps on the Physical Properties of Paper
Won, Jong-Myoung ; Shin, Dong-Joon ; Kim, Heung-Bae ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 2, 2009, Pages 7~12
The effects of refining either SwBKP or HwBKP, and both of SwBKP and HwBKP on the physical properties of paper were investigated in order to elucidate if the non-conventional refining and blending method can be used for the optimizing the paper properties. The blending ratio of SwBKP and HwBKP was 15:85. The highest bulk was obtained with the refining of SwBKP only. Any differences of opacity were not observed in unfilled paper, while the highest opacity of PCC filled paper was obtained at same bulk when the only HwBKP was refined. However burst index and tensile index did not showed any differences in the relationship with bulk. Therefore this result can be applied to improve the opacity of paper without sacrificing of strength properties.
Retention, Drainage, Formation, and Fracture Toughness Depending on Retention System, Molecular Weights of Polyelectrolytes and Dosage Sequences
Chae, Hee-Jae ; Kim, Mun-Sung ; Park, Chang-Soon ; Park, Jong-Moon ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 2, 2009, Pages 13~19
In order to produce high quality paper at the lowest cost in high speed, typically various polyelectrolytes as retention aids were used. Retention systems such as single polymer system, dual polymer system, and microparticle system were used. The objective of this study was to analyze the changes of retention, drainage, formation and fracture toughness depending on types of retention system, molecular weight of C-PAM and dosage sequences of agents. When single polymer system was applied, retention was increased with poor formation and drainage. When common microparticle system(C-PAM/bentonite) was used, high molecular weight PAM gave high retention and fast drainage, but poor formation. When the microparticle system with reverse dosage sequence(bentonite/C-PAM) was used, low molecular weight PAM gave high retention, fast drainage and good formation. When various retention agents were applied, fracture toughness was increased than that of blank. When using high molecular weight PAM and consequently causing excessive flocculation, fracture toughness was decreased.
Fundamental Study on the Substitution of Surface Sizing Using Internal Starches(Part 1)
Kim, Chul-Hwan ; Lee, Ji-Young ; Back, Kyung-Kil ; Lee, Young-Rok ; Chung, Ho-Kyung ; Lee, Hui-Jin ; Gwak, Hye-Joeng ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 2, 2009, Pages 20~25
Many researches are carried out for developing the technology to substitute the surface sizing, although this process improves physical properties and water resistance of paper. This is because surface sizing has fundamental limitation to increase drying energy consumption and to restrict speed of paper machine. However, practical and effective technologies were not developed yet. In this study, we investigated the possibility of the substitution of surface sizing using internal starches, such as cationic starch and oxidized starch. To identify effects of internal starches on physical and optical properties, papers were not only made by adding internal starches into pulp slurry but papers surface sized with oxidized starch were also prepared to compare physical and optical properties. Consequently, tensile strength and internal bond of paper containing internal starches were higher than those of surface sized paper by controlling the type and addition level of cationic starch.
A New Test Method to Evaluate Potential White Pitch Deposit - Influence of pH and calcium hardness -
Shin, Eun-Ju ; Choi, Tae-Ho ; Song, Bong-Keun ; Cho, Byoung-Uk ; Ryu, Jeong-Yong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 2, 2009, Pages 26~33
A new testing method to evaluate the deposition potential of white pitch was developed. The new method involves depositing the potential white pitch particles on the air bubble covered plastic film in the pitch deposit tester (PDT) developed by KRICT and analysing the deposited area of white pitch using an image analyzer. In addition, the effect of two important factors (pH and calcium hardness) on white pitch deposition potential was elucidated. When pH of the coated broke stock was increased from neutral to alkali or the calcium hardness of the stock was decreased, the pitch deposit area was decreased, implying that these two factors have to be controlled during the evaluation of pitch deposition potential. It was found that hydrophobicity of the surface of latex binding films repulped is a key factor influencing white pitch deposition.
Dyeing of Hanji with Flowers of Pagoda Tree (Sophora japonica)
Yoo, Seung-Il ; Oh, Se-Keung ; Lee, Sang-Hyun ; Choi, Tae-Ho ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 2, 2009, Pages 34~39
The traditional Korean hand-made papers (Hanji) were dyed with colorant extracted from flowers of Sophora japonica L.(pagoda tree), and the effect of various dyeing factors (mordant, mordanting method, pH of dyeing solution, etc.) on colors and K/S values of the dyed Hanji was investigated. Changing mordant affected the color of dyed Hanji. Mordanting with alum, copper acetate made the color of dyed Hanji more yellow, but dyed Hanji mordanted with
had dark olive color. The K/S value of the dyed Hanji mainly depended on the pH of the dyeing solution and mordanting method. It was found that sim-mordanting with alum was timesaving and effective dyeing method. The dyed Hanji sim-mordanted with alum had the highest K/S value at low pH (about 4).
Natural Dyeing Characteristics of Korean Traditional Paper with Smoke Tree (Cotinus coggygria Scop)
Lee, Sang-Hyun ; Yoo, Seung-Il ; Choi, Tae-Ho ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 2, 2009, Pages 40~46
The purpose of this study was to estimate natural dyeing properties of Korean traditional paper (Hanji). We dyed the Korean traditional paper with dyestuff which extracted from wood meal of Cotinus coggygria Scop (smoke tree) using hot-water, ethanol and
solution. As mordants, 0.5% of
solution were used respectively. The color of dyed Hanji mainly depended on not the methods of extraction but the kinds of mordant. The dyed Hanji mordant with
colored vivid yellow,
colored dark olive, and
colored brown and/or orange. The dyed Hanji with hot-water extractive had the highest K/S value and ethanol and
solution extractives were followed. The K/S value of dyed Hanji mordant with
was higher than that of
. The dyeing effectiveness of after-mordanting method was superior to the others but sim-mordanting method was the worst.
Microscopic Observation of Kenaf by Optical and Scanning Electron Micrograph
Yoon, Seung-Lak ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 2, 2009, Pages 47~54
Anatomical characteristics of kenaf were investigated in transverse, radial and tangential direction by optical and scanning electron micrograph. Kenaf was made up of bast fibers, wood fibers, vessels and parenchyma cells. Bast fibers were long slender cells with different types of pits. The shape of wood fibers were in various ways and pointed at the ends. The pits were observed on the surface of bast fibers. Kenafs were diffuse and radial porous. and composed of solitary pores and two or three radial pore multiples. Various types of vessels were observed. The pits showed alternate pitting and larger diameter than other cells. Parenchyma cells were rectangular or square with different shapes of pith parenchyma cells compared to conventional types of parenchyma cells in wood. The number of pith on the surfaces were small.
Determination of Heavy Metal Contents in Various Packaging Boards
Kim, Jin-Woo ; Seo, Joo-Hwan ; Youn, Hye-Jung ; Lee, Hak-Lae ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 2, 2009, Pages 55~63
This study was performed to evaluate the heavy metal contents in various packaging board. Domestic and foreign OCC (old corrugated containers) and old duplex boards were used as raw materials. Tests were made for the printed and unprinted parts of the sample. Heavy metal contents of old food packaging boards made from virgin pulp fibers were also evaluated. The contents of heavy metals including lead (Pb), cadmium (Cd), barium (Ba), arsenic (As), antimony (Sb), selenium (Se), and mercury (Hg) were determined using ICP-AES (Inductively Coupled Plasma - Atomic Emission Spectrometer), and CV-AAS (Cold vapor-atomic absorption spectrometer) after digesting the samples in a microwave oven. The contents of heavy metals contained in domestic packaging board were higher than those in overseas samples, and OCC showed higher contents of heavy metals than old duplex boards. Printed parts gave greater heavy metal contents than unprinted parts. Results indicate that recycling of paper and paperboard products increases the heavy metal contamination of the paper packaging products and this derives mostly from the heavy metals contained in printing inks. Recycling processes that decrease heavy metals in recycled fibers and new printing inks that contains less heavy metals should be developed to solve the problem associated with the heavy metals in packaging paper products.
Evaluation of Characteristics of Wax-treated Paper Depending on Coating Methods
Seo, Jin-Ho ; Choi, Kyoung-Hwa ; Park, Ji-Hee ; Kang, Yeong-Seok ; Yoon, Kyoung-Dong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 41, issue 2, 2009, Pages 64~69
Cultural heritages represent the histories and intellectual level of a country. The Annals of Joseon Dynasty are regarded as the most valuable resources containing the record of Korean history. In some periods, wax-treated paper was used as the material of the Annals of Joseon Dynasty. Many previous studies have focused on the development of paper used as the material of the Annals of Joseon Dynasty, but the manufacture method of wax-treated volumes and the degradation mechanism of wax have been not fully understood yet. The purposes of the present study are to produce various kinds of wax-treated paper using by different coating methods and to analyse the morphological properties of wax-treated paper. The analysis of SEM demonstrates that beeswax treated paper made by brushing method produces flatter surface and more excellent penetration. Wax layer is produced on the cross section of beeswax treated paper as the increase of coating amount.