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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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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
Editor in Chief :
Volume & Issues
Volume 46, Issue 6 - Dec 2014
Volume 46, Issue 5 - Oct 2014
Volume 46, Issue 4 - Aug 2014
Volume 46, Issue 3 - Jun 2014
Volume 46, Issue 2 - Apr 2014
Volume 46, Issue 1 - Feb 2014
Selecting the target year
Influence of the Variation of the Coating Color Composition and Characteristics of Inks on the Printability of the Coated Paper
Koo, Chul-Whoi ; Ha, Young Baeck ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 5, 2014, Pages 1~8
DOI : 10.7584/ktappi.2014.46.5.001
In this study, the influence of the physical properties of ink such as ink dispersity and emulsified amount on the printability of a coated paper was investigated with seven kinds of cyan inks. In addition, two kinds of coating formulations were tested to evaluate the effect of coating structure on the coated paper printability. It was found that the cyan ink with
pigment size had the best dispersibility and hence the ink showed a best ink density on the two kinds of coated papers. When the emulsified ink A with IPA 20 wt% had a lower viscosity than emulsified ink B with IPA 10 wt%, the emulsified ink A showed relatively high value of the ink transfer rate in comparison with emulsified ink B. Despite the high value of ink transfer rate, the coated paper did not show a good printability because those inks with low viscosity due to a strong emulsification were easy to make print mottle on the coated paper.
Physico-chemical Characteristics of Biodegradable Seedling Pots Made of Paper Mill Sludges
Lee, Ji-Young ; Kim, Chul-Hwan ; Lee, Gyeong-Sun ; Jo, Hu-Seung ; Nam, Hye-Gyeong ; Park, Hyung-Hun ; Moon, Sun-Ok ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 5, 2014, Pages 9~18
DOI : 10.7584/ktappi.2014.46.5.009
London Convention on the prevention of marine pollution by dumping of wastes and other matter prohibits the deliberate disposal of paper mill sludges at sea. In order to explore the alternative plan on the prohibition of sludge disposal at sea, the biodegradable seedling pot was developed by mixing the sludge with old newspaper (ONP) in appropriate mixing ratios. The C/N ratio of the mixed sludge was below 20, leading to rapid deterioration of the organic matters composing the seedling pot. The increased ONP contents in the seedling pot resulted in the increase of pot thickness and thereafter in the decrease of pot density. Cellulose fibers in ONP promoted water absorption of the pot but AKD addition helped the seedling pot to repel water during raising seedling. Breaking length and burst strength of the seedling pot were improved by addition of wet strength additives but air permeability was a little diminished. Biodegradable rate of the seedling pot in a soil was accelerated by the attack of soil microbes at the beginning, and finally the pot was completely degraded in 150 days in a soil.
Application of In-situ CaCO
Formation Method for Better Utilization of Recycled Fibers (1) - Enhancing Attachment of CaCO
to Fibers by Polymer Pre-Treatment -
Seo, Yung Bum ; Lee, Min Woo ; Lee, Young Ho ; Jung, Jae Kwon ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 5, 2014, Pages 19~26
DOI : 10.7584/ktappi.2014.46.5.019
formation on recycled wood pulp was studied to improve optical property and filler attachment to the fiber furnish in papermaking. We tried to attach calcium oxide (CaO) to the recycled fibers, old newspaper (ONP) in this case, by using selected polymers before in-situ
formation reaction on fibers, and then,
was injected to the furnish until all the CaO on fiber surfaces was consumed. It was found that the attachment of newly formed
to recycled fibers became stronger by attaching CaO to the fibers before in-situ
formation reaction. It was expected that the polymers used for the attachment of calcium source to the fiber furnishes helped to keep the newly formed
strongly attached to the fiber surface as well as to retain the impurities associated with calcium source and recycled fibers, if any. In-situ
formation gave higher brightness and much less ERIC value in ONP sheet than the case when the equivalent amount of GCC was added to the furnish.
Application of In-situ CaCO
Formation Method for Better Utilization of Recycled Fibers (2) - Comparison with CaCO
Addition Method and Effects of Temperature -
Lee, Min Woo ; Lee, Young Ho ; Jung, Jae Kwon ; Seo, Yung Bum ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 5, 2014, Pages 27~34
DOI : 10.7584/ktappi.2014.46.5.027
formation onto recycled wood pulp was studied to improve optical properties and ash attachment to the fiber furnish in papermaking. We controlled initial reaction temperature of in-situ
formation method from
. It was found that the attachment of newly formed
to recycled fibers, old newspaper (ONP) in this case, was stronger than that of ground calcium carbonate (GCC, mean dia.
) addition case, but was not much different among those formed at different temperature. Morphologies of newly formed
were changed according to the reaction temperature. More aragonite shape was seen at higher temperature. In-situ
formation increased brightness and lowered ERIC value of ONP sheet greatly at the same level of ash contents when compared to GCC addition method, but gave equivalent ERIC and brightness when compared to those of the precipitated calcium carbonate (PCC) addition method. However, tensile strength of the handsheets of the in-situ
formation method were much greater than those of the PCC addition method.
Strengthening Performance of Aged Papers with Chemical Strengthening Treatments
Lee, Hyeyoon ; Lee, Jegon ; Kim, Minsu ; Sim, Kyujeong ; Youn, Hye Jung ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 5, 2014, Pages 35~42
DOI : 10.7584/ktappi.2014.46.5.035
Many historical archives have been deteriorated by aging with time. Various kinds of defects such as worm-hole, yellowing, brittleness are observed and their severity was dependent on raw material type, storage condition, and so on. For a long-term use and storage, a proper preservation treatment is required. Many studies on preservation and conservation have been carried out on hanji which was made from mulberry fiber, but there are few concerns on foreign paper. Therefore, aging and chemical strengthening treatment was done on paper made of bamboo and wood fibers depending on aging condition, the type and pickup weight of chemicals and treatment method. When methyl cellulose was treated with impregnation or brushing, the aged paper was strengthened effectively. The strengthening effect by chemicals was dependent on the aged condition of the paper.
Application Evaluation of Physical and Strength Properties of Paperboard by Kraft Pulp Mixing Made from Agricultural Byproducts
Lee, Ji-Young ; Lim, Gi-Baek ; Kim, Sun-Young ; Park, Jong-Hye ; Kim, Eun-Hea ; Sung, Yong Joo ; Heo, Young-Jun ; Kim, Young-Hun ; Kim, Youn-Ho ; Lee, Se-Ran ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 5, 2014, Pages 43~50
DOI : 10.7584/ktappi.2014.46.5.043
The cultivation of agricultural crops results in the generation of agricultural byproducts. Researchers have reported that these materials can be useful in a variety of applications. However, over 50% of them are currently discarded because of the lack of specific technologies in industrial applications. Therefore, effective and specific applications must be developed in order to manufacture high-quality materials using discarded lignocellulosic resources. In this study, we determined the possibility of using kraft pulp from major agricultural byproducts as a raw material for the manufacture of paperboard. Rice husks, peanut husks, and garlic stems were obtained and used to prepare many kinds of kraft pulps by controlling the active alkali, sulfidity, reaction time, and liquor ratio. After the production of these kraft pulps, handsheets were manufactured by mixing them with KOCC. After preconditioning, the physical properties and strengths of the handsheets were measured according to the TAPPI test methods. The shapes, lengths, and widths of the pulp fibers varied according to the type of agricultural byproduct and the kraft pulping conditions. Rice husk and garlic stem pulps manufactured under mild pulping conditions resulted in handsheets of higher bulk than other pulps. Garlic stem pulps manufactured under mild pulping conditions were stronger than rice husk pulps and peanut husk pulps.
Effect of Shear Condition on Washless Polyelectrolytes Multilayering Treatment on GCC
Lee, Jegon ; Sim, Kyujeong ; Lee, Hak Lae ; Youn, Hye Jung ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 5, 2014, Pages 51~60
DOI : 10.7584/ktappi.2014.46.5.051
To find a practical application approach of polyelectrolyte multilayering (PEM) on inorganic filler, we introduced PEM process without washing step and investigated the effect of shear condition on the washless PEM treatment of ground calcium carbonate (GCC). Washless multilayering on GCC was conducted under various shear conditions such as stirring, homogenization, and ultrasonication. Highly charged polyelectrolytes combination of polydiallyldimethylammonium chloride (PDADMAC) and poly sodium 4-styrene sulfonate (PSS) and low charged polyelectrolytes combination with cationic starch and anionic polyacrylamide (PAM) were compared. In the case of highly charged polyelectrolytes combination, shear conditions did not affect the zeta potential and the particle size of treated GCC. However, the modified GCC particles with low charged polyelectrolytes were more dispersed under higher shear condition while maintaining the zeta potential. In addition, GCC was successfully modified through laboratory inline washless polyelectrolyte multilayering system which consists of homogenizers and pumps.
The Changes in Drying Efficiency and Paper Properties of Linerboard by the Application of the Fractions of Wood Powder as a Bulking Agent
Kim, Dong-Seop ; Yoon, Do-Hyun ; Sung, Yong Joo ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 5, 2014, Pages 61~68
DOI : 10.7584/ktappi.2014.46.5.061
The energy efficiency of papermaking process becomes more significant because of various new regulation of the energy consumption and the green house gas emission. In this study, the effects of wood powder addition on the drainage and the drying efficiency of the OCC based paper products, linerboard, were deeply investigated for improving energy efficiency. The fractionation of wood powder depending on the size were conducted. The bigger size of wood powder resulted in the higher bulk and the higher drainage efficiency, but the lower paper strength. The drying efficiency were in detail evaluated depending on the drying process level. In the first section of drying process until the 80% solid level, there were no significant changes in the drying efficiency by the addition of wood powder. However, after the 80 % solid level, the drying efficiency was greatly improved by the addition of wood powder. Those results showed the addition of wood powder could greatly affect not only the drainage in forming and wet pressing but also the drying process.
Evaluation of Control Efficiency of Oil Mark Originated from the Recycled Fibers
Sung, Yong Joo ; Yoon, Do-Hyun ; Kim, Dong Sub ; Lee, Ji-Young ; Heo, Young-Jun ; Kim, Young-Hoon ; Kim, Yeon-Oh ; Lee, Se-Ran ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 5, 2014, Pages 69~78
DOI : 10.7584/ktappi.2014.46.5.069
The paper recycling becomes more important technology in terms of the reduction of the municipal waste and of saving natural resource such as wood. However the more utilization of recycled fiber would result in the higher contaminants in the papermaking processes and in the deterioration of the paper quality. The oil marks in the paper products becomes one of the major defects of paper products originated from paper recycling. The coagulation of various stickies in recycled fiber stock led to the oil marks. In this work, we applied functional polymer additives such as the dispersing agents, the fixing agents and the hydrophobic talc powder for the control of those stickies in order to remove the oil marks. The addition of the talc powder showed the great reduction in the oil marks of the packaging paper products. The hydrophobic surface of the talc particles collected the individual sticky materials and prevented their aggregation in the recycled fiber stock, which resulted in the great reduction of the oil marks on the paper products.
Characterization of Water Hyacinth (Eichhornia crassipes) Biomass and Evaluation of Applicability as an Organic Filler to Papermaking
Kim, Dong Sung ; Heo, Yoon Sung ; Sung, Yong Joo ; Han, Seung-Won ; Seo, Cheol Mo ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 5, 2014, Pages 79~87
DOI : 10.7584/ktappi.2014.46.5.079
The enrichment with nutrients in rivers and lakes becomes serious problems in Korea. As the environmental friendly solution, the phytoremediation are getting more attention and the water hyacinth could be a strong candidate plant for this. Water hyacinth is a free floating freshwater plant proven to be a effective plant used for a purification of a polluted lakes, sewage wastewater, and livestock wastewater. The biggest obstacles for application of water hyacinth in Korea could be the disposal of the water hyacinth before winter, because there is no feasible use for the water hyacinth until now. In this study, the characteristics of water hyacinth were deeply investigated for providing background data to develop appropriate application of the water hyacinth. The water hyacinth was fractioned three parts, leaf, air blader, root of which morphological properties were evaluated with microscope and field emission scanning electron microscope (FE-SEM). The water contents of each parts of the water hyacinth were 87% for leaf, 96.5% for air bladder, 94.6% for root. The chemical compositions of each parts were also measured and showed around 29% of hot water extract in leaf and air bladder, 42% holocellulose for leaf, 47% holocellulose for air bladder. The application of water hyacinth biomass without root parts to papermaking provided bulkier structure, but the tensile strength was decreased.
Study on the Sheet-Making of Hanji for the Reproduction of Traditional Gold Thread
Park, Mi Seon ; Jeong, So Yoon ; Jang, Seong Woo ; Kim, Hyoung Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 5, 2014, Pages 88~97
DOI : 10.7584/ktappi.2014.46.5.088
For the purpose of reproduction of traditional gold thread, the artifact investigation was organized for 70 cases (109 pieces) of relics from Korea, China and Japan. In most cases, the main backside material of gold thread from Korea was the bast fibers from paper mulberry. In this study, the optimum sheet-making of Hanji for gold thread reproduction was tried by controlling several process factors of Hanji such as the cooking and beating time of paper mulberry fibers, the number of sheet-making ply, and converting method (Dochim). Tensile index, folding endurance and compressive strength of Hanji showed differences according to the correlation between cooking and beating time, and application of converting method (Dochim), while bending stiffness fell with decrease of thickness. These results can be applied to consider manufacturing factors to make Hanji for the production of gold thread.