Go to the main menu
Skip to content
Go to bottom
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 47, Issue 6 - Dec 2015
Volume 47, Issue 5 - Oct 2015
Volume 47, Issue 4 - Aug 2015
Volume 47, Issue 3 - Jun 2015
Volume 47, Issue 2 - Apr 2015
Volume 47, Issue 1 - Feb 2015
Selecting the target year
Improvement of Bending Stiffness in White Duplex Board by Utilization of Wood Fibers from Medium Density Fiberboard (2) Ozone treatment
Seo, Yung Bum ; Kim, Hyun Jun ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 1~9
DOI : 10.7584/ktappi.2015.47.1.001
Wood fibers for medium density fiberboard (MDF) was used in the filler layer of the white duplex board for increasing thickness and bulk of the board. The MDF fibers were treated with ozone (3% based on dry weight of the fibers), and mixed together with OCC (old corrugated container) to form paper. Ozone-treated MDF fibers gave high bulk, high tensile strength, high internal bond and fast drainage to the furnish mixed with OCC. It was shown that there were possibilities to reduced basis weight of the filler layer without loss of thickness, stiffness, and tensile strength. Furthermore, it showed the possibility to develop a new kind of board product that has high stiffness as well as high strength properties with light basis weight by application of the ozone-treated MDF fibers.
Manufacturing of Multi-Layer Coated Paper with Eco-Friendly BioBinder for Cost Saving(2) - Application for Top-Coating Layer -
An, Guk Heon ; Choi, Ki Soon ; Won, Jong Myoung ; Lee, Yong Kyu ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 10~16
DOI : 10.7584/ktappi.2015.47.1.010
Bio-binder is well known as a promising alternative binder for SB latex because it is eco-friendly and inexpensive, compared to synthetic latex. SB latex in top coating color was substituted with starch-based bio-binder to investigate its effects on the coating color and its coated paper properties. Bio-binder contributed to the increase of coating color viscosity, and the improvement of water retention. Most optical properties except opacity were deteriorated by the increase of bio-binder dosage. It was also found that the increase of bio-binder substitution in top coating color brought about the increase of roughness, and decrease of coated paper gloss, print gloss, dry and wet pick strength. However the stiffness and the ink set-off of the bio-binder coated paper were improved. Overall, mostly adverse effects of bio-binder on the properties of coating color and its paper were observed. Therefore, it is not recommended to use bio-binder as top coating color.
Impact of sodium or potassium cations in culture medium to ethanol fermentation by Saccharomyces cerevisiae
Song, Woo-Yong ; Seung, Hyun-A ; Shin, Soo-Jeong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 17~23
DOI : 10.7584/ktappi.2015.47.1.017
In bioethanol from acid hydrolysis process, neutralization of acid hydrolyzate is essential step, which resulted in dissolved cations in glucose solution. Impact of cations to Saccharomyces cerevisiae in glucose solution was investigated focused on ethanol fermentation. Both potassium and sodium cations decreased the ethanol fermentation and glucose to ethanol conversion as potassium or sodium cations. In sodium cation, more than 1.13 N sodium cation in glucose solution led to ethanol production less than theoretical yield with severe inhibition. In 1.13 N sodium cation concentration, ethanol fermentation was slowed down to reach the maximum ethanol concentration with 48 h fermentation compared with 24 h fermentation in control (no sodium cation in glucose solution). In case of potassium cation, three different levels of potassium led to silimar ethanol concentration even though slight slow down of ethanol fermentation with increasing potassium cation concentration at 12 h fermentation. Sodium cation showed more inhibition than potassium cation as ethanol concentration and glucose consumption by Saccharomyces cerevisiae.
Study of Oil Palm Biomass Resources (Part 4) Study of Pelletization of Torrefied Oil Palm Biomass -
Sung, Yong Joo ; Kim, Chul-Hwan ; Lee, Ji-Young ; Cho, Hu-Seung ; Nam, Hye-Gyeong ; Park, Hyeong-Hun ; Kwon, Sol ; Kim, Se-Bin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 24~34
DOI : 10.7584/ktappi.2015.47.1.024
Domestic companies supplying electricity must increase obligatory duty to use renewable energy annually. If not met with obligatory allotment, the electricity-supply companies must pay RPS (Renewable Portfolio Standards) penalty. Although the power plants using a pulverizing coal firing boiler could co-fire up to around 3 per cent with wood pellets mixed in with coal feedstock without any major equipment revamps, they recorded only about 60 per cent fulfillment of RPS. Consequently, USD 46 million of RPS penalty was imposed on the six power supplying subsidiaries of GENCOs in 2014. One of the solutions to reduce the RPS penalty is that the power supply companies adopt the co-firing of torrefied lignocellulosic biomass in coal plants, which may contribute to the use of over 30 per cent of torrefied biomass mixed with bituminous coals. Extra binder was required to form pellets using torrefied biomass such as wood chips, PKS (Palm Kernel Shell) and EFB (Empty Fruit Bunch). Instead of corn starch, 30, 50 and 70 per cent of Larix saw dusts were respectively added to the torrefied feedstocks such as Pinus densiflora chips, PKS and EFB. The addition of saw dusts led to the decrease of the calorific values of the pellets but the forming ability of the pelletizer was exceedingly improved. Another advantage from the addition of saw dusts stemmed from the reduction of ash contents of the pellets. Finally, it was confirmed that torrefied oil palm biomass such as PKS and EFB could be valuable feedstocks in making pellets through improved binding ability.
Optimization Technology of Thermomechanical Pulp Made from Pinus densiflora (I) - Effect of Temperature and NaOH at Presteaming and Refining -
Nam, Hyegeong ; Kim, Chul-Hwan ; Lee, Ji-Young ; Park, Hyunghun ; Kwon, Sol ; Cho, Hu-Seung ; Lee, Gyeong-Sun ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 35~44
DOI : 10.7584/ktappi.2015.47.1.035
Thermomechanical pulping process uses large amounts of energy, mostly electricity to run electrical facilities. Thermomechanical pulp (TMP) made from Pinus densiflora also has a big drawback that refining consumes 90 per cent of the total energy used in TMP process. This study explored to draw up a way to save refining energy through different thermal treatment at the stages of presteaming and refining. Presteaming temperature was
. After presteaming at each temperature, refining was carried out at
respectively. In a presteaming stage, steaming temperature over
greatly contributed to the decrease of refining energy leading to earlier attainment of a target freeness, irrespective of refining temperature. In addition, NaOH treatment with presteaming enhanced better development of fiber properties during refining than presteaming without NaOH. High temperature refining at
produced a high strength paper, and wood chips treated by alkali responded better to refining than at over
. Improved softening effect on wood chips led to the decrease in shives contents but it gave no effect on pitch contents of TMP.
Preparation and Characteristics of Anti-Fungal Paper with Natural Extractives
Kim, Kang-Jae ; Jung, Jin-Dong ; Ahn, Eun-Byeoul ; Eom, Tae-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 45~51
DOI : 10.7584/ktappi.2015.47.1.045
The anti-fungal activity of plant extractives was investigated and the lacquer extractives were selected. The lacquer extractives were coated on anti-fungal paper and confirmed its effect. Water repellency, tensile index and brightness of anti-fungal paper treated with natural extractives were similar to commercial pesticide-treated paper. The incidence of Fusicaladium leuieri MAGNUS of commercial pesticide-treated paper and anti-fungal paper treated with lacquer were similar but, the incidence of Botryosphaeria dothidea (Moug.) Ces & De Not and Gloeodes pomigena of those were increased 10-60 % than commercial pesticide-treated paper.
Analysis of the Behavior of Fluorescent Whitening Agents in Recycling Process of White Ledger
Lee, Ji Young ; Kim, Chul Hwan ; Park, Jong-Hye ; Kim, Eun-Hea ; Sung, Yong Joo ; Heo, Young-Jun ; Kim, Young-Hoon ; Kim, Yeon-Oh ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 52~58
DOI : 10.7584/ktappi.2015.47.1.052
White ledger usually includes white office paper, computer paper, and copy machine paper. Because these grades need high optical properties, fluorescent whitening agents (FWAs) are widely used in the papermaking process. FWAs are the most powerful and effective chemical used to obtain high CIE whiteness and ISO brightness in papers. The rising demand for white or ultra-white papers has increased the use of FWAs. However, FWAs used in white ledger can restrict its use, even though white ledger is widely used as a raw material in paperboard mills. Therefore, it is necessary to develop methods to control FWAs from white ledger to increase its use in paperboard mills. In this study, the behaviors of disulpho fluorescent whitening agent (D-FWA), tetrasulpo fluorescent whitening agent (T-FWA), and hexasulpho fluorescent whitening agent (H-FWA) during the recycling process were identified as a first step to remove FWAs from white ledger. We prepared four types of papers (dyed with D-FWA, T-FWA, and H-FWA), disintegrated these papers, and made handsheets. This recycling process was carried out three times in a laboratory. After each round of recycling, the hand-sheets' CIE whiteness and fluorescence index were measured, and the distribution of FWAs in the Z-direction was observed using CLSM images. FWA reductions in the model papers were calculated using fluorescence indices as a function of the number of recycling. FWAs in handsheets containing T-FWA and H-FWA decreased linearly as a function of the number of recycling, but D-FWA did not show a significant reduction in the fluorescence index after recycling. T-FWA and H-FWA showed similar distributions of D-FWA after recycling. Therefore, as much T-FWA and H-FWA as possible must be detached in the early processes of papermaking at paperboard mills.
Enzyme Activity and Beating Properties for Preparation of MicroFibrillated Cellulose(MFC)
Kim, Kang-Jae ; Jung, Jin-Dong ; Jung, Soo-Eune ; Ahn, Eun-Byeoul ; Eom, Tae-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 59~65
DOI : 10.7584/ktappi.2015.47.1.059
In this study, we evaluated optimum condition of enzyme with pH and temperature for preparation of microfibillated cellulose(MFC). Well-known endo-glucanase, three enzymes were used and CMC was used for substrate. Enzyme activity was evaluated using DNS method and absorbance with UV/VIS spectrophotometer. The enzyme shown the greatest activity was reacted with pulps at optimum condition for 1 hour and treated pulps beated until 100 mL CSF. Enzyme B and Enzyme L was the higher enzyme activity below 0.1% concentration and Enzyme N was the lowest enzyme activity. At various pH and temperature conditions, enzyme activity of Enzyme B was higher than the others at the same concentration. Especially enzyme activity at
of Enzyme B was almost not changed over pH 6.0. Optimum condition of three enzyme was pH 6 or pH 7 and
. Also beating efficiency of enzyme treated pulps with Enzyme B is 55.6%.
The effect of bleaching reagents on bleachabilities of DIP and environmental loads
Ahn, Chi-Deuk ; Park, Jung-Yoon ; Hwang, Sung-Jun ; Hong, Seok-Jun ; Lee, Jin-Hee ; Kim, Hyoung-Jin ; Chung, Sung-Hyun ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 66~74
DOI : 10.7584/ktappi.2015.47.1.066
DIP(deinked pulp) was bleached by FAS,
, which are widely used in DIP bleaching process, in order to improve optical properties of DIP, and the bleaching efficiencies of DIP and environmental loads of waste water were compared, depending on bleaching chemical dosages. With the application of different bleaching chemicals, some positive improvements were shown in optical and physical properties of bleached pulp. However, the physical properties of bleached DIP and their characteristics of wastewater were remarkably different, depending on dosages and bleaching reagents. DIP chemicals with FAS and
have higher improvement in optical and physical properties than
. Also, environmental loads such as pH, turbidity, SCODcr and cationic demand were decreased in reductive bleaching process. Despite of higher effectiveness of reductive bleaching process, there were some environmental problems caused by sulfur ions from FAS and
. With the method of sulfur ion controls, it would be more effective than
Changes in the Water Absorption Properties of Pulp Mold manufactured with Oil Palm EFB by surface treatments
Kim, Dong-Sung ; Sung, Yong Joo ; Kim, Chul-Hwan ; Kim, Se-Bin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 75~83
DOI : 10.7584/ktappi.2015.47.1.075
The applicability of oil palm biomass, EFB(Empty Fruit Bunch) as raw materials for environmental friendly packaging material, pulp mold, was evaluated in this study. The changes in the water absorption properties of pulp mold by the addition of EFB and the surface treatments with PVA and AKD were analyzed by measuring the changes in the water absorption rate and the water contact angle. The each pulp mold sample was prepared by using laboratory wet pulp molder. And the water absorption rate of each samples were evaluated by measuring times for the absorption of a 0.1 ml water drop on the pulp mold sample surface. The addition of EFB to the pulp mold made of OCC resulted in the decrease of water absorption rate and the increase in the water contact angle. The surface treatments with PVA and AKD on the OCC pulp mold showed the significant reduction in the water absorption rate. However, in case of ONP pulp mold, the addition of EFB and the surface treatments with PVA and AKD showed no big changes in water absorption times. Those might be come from the finer surface structure of ONP pulp mold which were made of more finer and flexible fibers and more hydrophilic fibers. The results of this study showed the functional properties such as water absorption rate, could be controlled by the application of EFB and the treatments with AKD or PVA, especially in case of the OCC pulp mold.
Production of High Loaded Paper by Dual Flow Addition of Fillers (II) - Effect of Location of Starch Addition -
Choi, Do-Chim ; Won, Jong Myoung ; Cho, Byoung-Uk ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 84~92
DOI : 10.7584/ktappi.2015.47.1.084
Fillers have been used to improve the optical and printing properties and to reduce the production cost while increasing the filler content in paper causes adverse effects on paper strength. In the previous study, it was shown that the thick stock addition of filler can increase the filler content without significantly sacrificing paper strength. This study was carried out to elucidate the effect of the location of starch addition (before or after the filler addition) on handsheet properties and a papermaking process as a part of developing the thick stock loading technology. In addition, effects of dual flow addition of cationic starch were evaluated. It was found that paper strength was superior when cationic starch was added after the filler addition. No adverse effects on optical properties, formation and filler retention were observed. Drainage was a bit slower when starch was added after the filler addition, which shall be resolved with regulating other factors. Dual flow addition of cationic starch before and after filler addition did not show any special advantage.
Properties of Fluff Pulp and Handsheet Recycled from Paper Diaper
Choi, Kyoung-Hwa ; Cho, Jun-Hyung ; Kim, Chang Geun ; Lee, Ho Sun ; Ryu, Jeong-Yong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 47, issue 1, 2015, Pages 93~101
DOI : 10.7584/ktappi.2015.47.1.093
The purpose of this study is to examine the reusability of the fluff pulp recycled from paper diaper. To do this, the physical and optical properties of each handsheet made from these fluff pulp sample as well as the properties of the fiber recycled from paper diaper were analyzed and compared with those of non-recycled diaper fluff pulp samples and conventional pulp samples. These comparisons show that the characteristics of fiber such as length, width, curl, kink of the pulp recycled from paper diaper were similar to those of non-recycled diaper fluff pulp as well as to those of commercial pulp. The fine content of recycled diaper fluff pulp was lower than that of other pulp samples, while the ash content of the former was higher than that of the latter. Furthermore, it was also found that the bulk of handsheets made from the recycled fluff pulp was higher than that of other pulp samples, while the formation of the former was worse than that of the latter. The mechanical properties of the handsheet sample made from the recycled diaper fluff pulp was higher than those of the unused diaper fluff pulp and was lower that those of commercial fluff pulp and softwood tissue pulp handsheet. But, it was higher than that of hardwood tissue pulp handsheet. The optical properties of recycled diaper fluff pulp handsheet was lower than those of each handsheet samples made from other pulps due to its low fine content.