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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
Editor in Chief :
Volume & Issues
Volume 45, Issue 6 - Dec 2013
Volume 45, Issue 5 - Oct 2013
Volume 45, Issue 4 - Aug 2013
Volume 45, Issue 3 - Jun 2013
Volume 45, Issue 2 - Apr 2013
Volume 45, Issue 1 - Feb 2013
Selecting the target year
Study of Conservational Methods for the Old Printing Papers
Lee, Kwi-Bok ; Hyeon, Hye-Won ; Jung, Sun-Young ; Seo, Yung-Bum ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 1, 2013, Pages 1~5
DOI : 10.7584/ktappi.2013.45.1.001
Printing papers published in between 1950's and 1990's were treated with three methods such as distilled water washing,
solution washing and methyl cellulose solution coating for improving their conservational properties. Accelerated aging with
and 80% RH for 14 days was applied to the testing papers. Results showed that distilled water and
washing kept increased pH even after accelerated aging, but did not improve folding endurances for 1950's-60's papers. Methyl cellulose treatment did not increased pH of the old papers, but increased folding endurances remarkably for 1950's-60's papers even after accelerated aging. It suggests that methyl cellulose treatment after
washing should give improvements both in pH and folding endurance.
Chemical and Mechanical Properties of Yellow Poplar Pulp Produced by Formic Acid- Hydrogen Peroxide Pulping
Sim, Jaehoon ; Kim, Jeong-Ho ; Park, Jong-Moon ; Shin, Soo-Jeong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 1, 2013, Pages 6~12
DOI : 10.7584/ktappi.2013.45.1.006
TFormic acid-hydrogen peroxide (or performic acid) pulping process needs milder reaction condition than other chemical pulping process. Two-step formic acid-hydrogen peroxide pulping process can produce the chemical pulp with similar pulp yield and lignin content compared with soda-anthraquinone process. Formic acid-hydrogen peroxide pulp can be produced less xylan content than other alkaline pulps, which favor for dissolving pulp production. Formic acid-hydrogen peroxide pulp showed better response beating than soda-anthraquinone(AQ) pulps with reaching target freeness with less beating. Also, formic acid-hydrogen peroxide pulp had better tensile index at similar freeness level compared with soda-AQ pulps.
Study of Oil Palm Biomass Resources (Part 1) - Characteristics of Thermal Decomposition of Oil Palm Biomass -
Sung, Yong Joo ; Kim, Chul-Hwan ; Cho, Hu-Seung ; Sim, Sung-Woong ; Lee, Gyeong-Sun ; Cho, In-Jun ; Kim, Se-Bin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 1, 2013, Pages 13~20
DOI : 10.7584/ktappi.2013.45.1.013
In this study, oil palm biomass such as empty fruit bunch (EFP) and palm kernel shell (PKS) was used as raw materials for making pellets. EFB and PKS are valuable lignocellulosic biomass that can be used for various purposes. If EFB and PKS are used as alternative raw materials for making pellets instead of wood, wood could be saved for making pulps or other value-added products. In order to explore their combustion characteristics, EFB and PKS were analyzed using thermal gravimetric analyzer (TGA) with ultimate and proximate analyses. From the TGA results, thermal decomposition of EFB and PKS occurred in the range of 280 to
through devolatilization and combustion of fixed carbon. After
, their combustion were stabilized with combustion of residual lignin and char. PKS contained more fixed carbons and less ash contents than EFB, which indicated that PKS could be more active in combustion than EFB.
The Influence of Base Paper Sizing on Coating Penetration into Paper
Kim, Bong Yong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 1, 2013, Pages 21~26
DOI : 10.7584/ktappi.2013.45.1.021
The influences of heat treatment and surface sizing on coating penetration were studied using two types of commercial base papers. Dry oven was used for heat treatment and laboratory rod draw down coater was used for surface sizing and coating application. Coating penetration was evaluated by measuring the roughness of the backside of coating layer. The backside of the coating was exposed by dissolving the fibers in a cupriethylenedimine(CED) solution. The results showed that both heat treatment and surface sizing were the effective methods to increase sizing degree and to reduce coating penetration.
Quantitative analysis of 5-HMF produced from fructose
Sim, Jaehoon ; Shin, Soo-Jeong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 1, 2013, Pages 27~34
DOI : 10.7584/ktappi.2013.45.1.027
Quantitative analysis of 5-hydroxymethylfufural (5-HMF) conversion from fructose by dehydration and rearrangement was investigated by
-NMR spectroscopic method. Fructose was converted to 5-HMF in dimethylsulfoxide (DMSO)-
or acidic deuterium hydroxide at controlled reaction temperature and time. With addition of internal standards (biphenyl for DMSO-
solvent, and 2,5-dihydroxybenzoic acid for deuterium oxide solvent), conversion from fructose to 5-HMF was analyzed by
-NMR spectroscopy. Quantitative analysis was run by comparison with peak area integration between of 5-HMF and internal standard. In DMSO solvent, 5-HMF was stable end product but part of 5-HMF was converted to formic and levulinic acid at acidic aqueous medium.
Effect of the Number of Passes through Grinder on the Pore Characteristics of Nanofibrillated Cellulose Mat
Sim, Kyujeong ; Ryu, Jaeho ; Youn, Hye Jung ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 1, 2013, Pages 35~41
DOI : 10.7584/ktappi.2013.45.1.035
In this study, we investigated the effect of the number of passes through agrinder on the pore characteristics of nanofibrillated cellulose (NFC) mat. The beaten pulp suspension was used to make NFC suspension using a grinder. To evaluate the pore characteristics of a NFC mat, the surface morphology of the dried NFC mat was observed with FE-SEM and the specific surface area was analyzed with BET nitrogen gas adsorption. The structure of NFC mat was changed with the different number of passes and drying methods. The specific surface area of NFC mat increased with the increase in the number of passes. The 20-passed NFC mat had 20 times larger specific surface area (
) compared to the 0-passed NFC mat. The specific surface area was strongly correlated with the average pore size in NFC mat. The average pore diameter in NFC mat was calculated from the gas sorption isotherms using BJH model. The value was 13 - 15 nm, indicating that the NFC mat had mesoporous structure.
Study of Oil Palm Biomass Resources (Part 2) - Manufacturing Characteristics of Pellets Using Oil Palm Biomass-
Sung, Yong Joo ; Kim, Chul-Hwan ; Cho, Hu-Seung ; Kim, Sung-Ho ; Sim, Sung-Woong ; Yim, Su-Jin ; Lee, Ji-Young ; Kim, Se-Bin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 1, 2013, Pages 42~51
DOI : 10.7584/ktappi.2013.45.1.042
In this study, oil palm biomass such as empty fruit bunch (EFB) and palm kernel shell (PKS) was used as raw materials for making pellets. Hardwood sawdusts were also mixed with EFB and PKS for making pellets. For improving a bad forming behavior in a pelletizer, 1 to 3 per cent of corn starch based on oven-dried weight biomass was added. The starch contributed to the decrease of dust generation in addition to the improvement of forming capability during pellet forming. Heating values of every pellets made of EFB and PKS were higher than 4,300 kcal/kg for the first grade pellet, irrespective of addition of sawdusts. However, the pellets made of EFB and PKS had ash contents over 3 per cent, which made it impossible to be applied for home use. Instead, they could be applied for industrial use. For studying their combustion characteristics, the pellets from the mixtures of EFB, PKS and sawdusts were analyzed using thermal gravimetric analyzer (TGA). From the TGA results, thermal decomposition of EFB and PKS occurred following three including endothermic reaction and dehydration, devolatilization of the major chemical components, and finally combustion of residual lignin and char.
Changes in Properties of Tropical Kapok Fibers by the Pretreatments
Shin, Soo-Jeong ; Jung, Woong-Ki ; Sung, Yong Joo ; Lee, Joon-Woo ; Kim, Se-Bin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 1, 2013, Pages 52~58
DOI : 10.7584/ktappi.2013.45.1.052
The effets of the pretreatments of tropical kapok fibers were evaluated in this study in terms of water sorption capacity and oil sorption capacity. The alkali treatments with NaOH resulted in the reduction of lignin, oil and hemicellulose, which were detected with FT-IR spectrum. The reduction of the lyphophilic components such as fat on kapok fiber by the ozone treatments were also measured with FT-IR spectrum. The oil sorption capacity of kapok fiber was decreased by the alkali treatments and the ozone treatments, while the water sorption capacity was increased. The liquid sorption capacity were greatly affected by the mechanical cutting of kapok fiber which exposed the big lumen of kapok fiber. The hydrophilic property of kapok fiber could be controlled by the pretreatments, which would increase the applicability of kapok fiber for preparation of various functional paper products.
Paper Strength Improvement by Anionic PAM and Cationic Starch Adsorbed PCC
Choi, Do-Chim ; Choi, Eun-Yeon ; Won, Jong Myoung ; Cho, Byoung-Uk ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 1, 2013, Pages 59~66
DOI : 10.7584/ktappi.2013.45.1.059
Fillers have been used for printing paper to improve printability, sheet formation and optical properties and to reduce production costs by replacing expensive wood pulps. However, an increased filler content will decrease paper strength because filler particles interfere with fiber-fiber bonding. In order to increase filler content without sacrificing too much paper strength in high filler content papers, the surface of precipitated calcium carbonate (PCC) has been modified by adsorbing anionic polyacrylamide and cationic starch in series. The adsorbed polymer layers would enhance interactions between the filler surface and the fiber surface, improving internal bonding. It was found that the modified PCC increased paper strength at a given filler content compared to the coventional method. Negligible differences in optical properties and formation of paper, filler and fines retention and drainage on the wire section were observed between the modified and the conventional PCC. However, the decreased bulk of paper was observed when the modified PCC was used.
Evaluation of Defiberation by Organosolv Ethanolamine Pulping for Integral Utilization of Oil Palm EFB
Kim, Chul-Hwan ; Kim, Dong-Seop ; Sung, Yong Joo ; Hong, Hae-Eun ; Kim, Se-Bin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 1, 2013, Pages 67~74
DOI : 10.7584/ktappi.2013.45.1.067
Organosolv ethanolamine pulping for oil palm empty fruit bunches(EFB) were evaluated in this study. The screen yield by the ethanolamine pulping were higher than that by the soda pulping at the same operation conditions. The higher concentration of ethanolamine solvent resulted in the higher yield and the lower contents of residual lignin. The EFB pulp fibers were the narrower in fiber width but the higher in coarseness than those of the hardwood pulp fiber, while the fiber length of the EFB pulp fiber were similar to that of the hardwood fiber. The intrinsic zero span tensile testing showed the EFB pulp fiber by the 80% ethanolamine pulping were the stronger than the fiber by the soda pulping. The results of this study supported that the ethanolamine pulping could be used as an alternative pulping method for the EFB.
Pulping Properties of Bast Fibers of Paper Mulberry by Pre-steaming and 2-stage Cooking System
Hwang, Ji Hyun ; Seo, Jin Ho ; Kim, Hyoung Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 1, 2013, Pages 75~82
DOI : 10.7584/ktappi.2013.45.1.075
The traditional Hanji-making was confronted with lots of industrial disadvantages and economic problems, due to the original hand-made process. Recently, the studies on the automation of overall Hanji manufacturing process is carried out by applying the commercial chemical pulping method in order to expand industrial application or efficiency of non-wood fibrous materials. However, the application of commercial pulping methods to the bast tissues of paper mulberry leads to the chemical and mechanical deterioration of cellulosic fibers. In this study, the optimal cooking method using the bast parts of paper mulberry produced by an auto-scraping device was applied to minimize the damage of fiber strength for the paper yarn manufacture. The pre-steaming treatment and alkaline pulping systems were evaluated in removal efficiency of lignin and pectin materials within the bast tissue of paper mulberry. With the application of pre-steaming treatment and 2 stage pulping system using potassium carbonate and then sodium hydroxide, kappa values were decreased two times more in lignin removal than the single stage of pulping method. It was also identified from SEM images and ATR-FTIR spectra that the pectin components within cellular structure of bast tissue were easily removed and the debarked bast parts by a auto-scraping device were easily defiberized by 2-stage pulping sequence using potassium carbonate/sodium hydroxide pulping system.