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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
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Volume & Issues
Volume 44, Issue 6 - Dec 2012
Volume 44, Issue 5 - Oct 2012
Volume 44, Issue 4 - Aug 2012
Volume 44, Issue 3 - Jun 2012
Volume 44, Issue 2 - Apr 2012
Volume 44, Issue 1 - Feb 2012
Selecting the target year
Study for Optimum Use of Forest Biomass Generated from the National Forest Management Operation (Part 2) - Fitness of Mixed Wood Species as Raw Materials for Kraft Pulp -
Lee, Jee-Young ; Kim, Chul-Hwan ; Park, Hyun-Jin ; Kim, Sung-Ho ; Kim, Gyung-Chul ; Sheikh, M.I. ; Cho, Hu-Seung ; Shim, Sung-Woong ; Lee, Young-Min ; Ahn, Byung-Il ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 6, 2012, Pages 1~8
DOI : 10.7584/ktappi.2012.44.6.001
This study was carried out to explore optimum use of the products generated from the National Forest Management Operation (NFMO) as raw materials for kraft pulp. First of all, different wood species from NFMO were randomly mixed, and then they were used to make kraft pulp under the specified condition. All kraft pulps made from the mixed species displayed equal physical properties to those from foreign wood chips used in Moorim P&P Co. Ltd. For optical properties, most of the unbleached pulps had high brightness but the pulp made from wood species containing chestnut tree showed the lowest brightness due to its high kappa number. Finally, the products from NFMO had little negative effects on the properties of kraft pulps. This means that they could be used as complementary raw materials for kraft pulps with foreign wood chips.
Characteristics of Beeswax-treated Hanji Aged by Closed and Ventilated Chamber
Kang, Yeong Seok ; Yang, Eun Jeong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 6, 2012, Pages 9~14
DOI : 10.7584/ktappi.2012.44.6.009
Currently a variety of efforts to conserve and restore the injured the Annal of the Joseon Dynasty are continued and many studies about the aging pathway of the beeswax-treated volume have being progressed. In this study, two chambers were set up to assess the influence of VOCs(Volatile Organic Compounds) generated in process of beeswax deterioration. One chamber was closed and the other was continuously ventilated in order to remove the VOCs. In results, the acid compounds of beeswax-treated Hanjis aged in closed chamber was more than that aged in ventilated chamber. The folding endurance of beeswax-treated Hanjis aged in closed chamber was lower than that aged in ventilated chamber. Accumulated acid compounds of beeswax-treated Hanji in closed chamber may cause accelerated aging and strength decrease. In conclusion, accumulated acid compounds can accelerate the aging of beeswax-treated Hanji and cause the severe deterioration of inside of beeswax-treated volume. Therefore, to preserve more safely beeswax-treated volumes of the Annals of the Joseon Dynasty, it is essential that VOCs emitted from beeswax-treated volume are ventilated.
Evaluation of the Effects of Sulfur Dioxide(SO
) on Conservation of Paper
Lim, BoA ; Kim, Myoungnam ; Lee, Sunmyung ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 6, 2012, Pages 15~20
DOI : 10.7584/ktappi.2012.44.6.015
The effects of sulfur dioxide on paper were investigated since these sulfur compounds could cause damages on cellulose and organic materials in papers. For the reason, exposure ageing tests were performed on traditional Korean paper (Hanji) and two different types of modern paper (acid-free and acid paper) to determine the damage with regard to the optical as well as physicochemical properties according to the varying
concentration. As a result, optical properties were not changed while physical and chemical peoperties were remarkably changed with the exposure period. In the case of pH,
had little impact on the pH of the Hanji and acid-free paper while the pH of acid paper was remarkably decreased. The decrease of the folding endurance of the Hanji was relatively smaller than those of the acid-free and acid paper. The results prove Hanji was more resistant to
than the modern paper in terms of optical, physical and chemical properties. In addition, it was also suggested that
concentration should be kept below 0.01 ppm for the preservation of paper objects.
Wet Pressing Properties of OCC Stock depending on the Fines Contents
Jung, Woong-Ki ; Sung, Yong Joo ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 6, 2012, Pages 21~27
DOI : 10.7584/ktappi.2012.44.6.021
The effects of fines contents in OCC stock on the wet pressing process were evaluated in this study. The fines were collected from the beaten OCC stock by using 200 mesh. The dryness of handsheet samples after the couch and after the 1st wet press were greatly affected by the fine contents of the OCC stock. The higher contents of fines resulted in the lower value in dryness but the higher value of density followed by the higher strength properties. The addition of the retention aids and the drainage aids on the OCC stocks showed the wet pressing efficiency were greatly affected by the fine contents rather than the addition of polymer additives. The increase in the fine retention by the polymer additives offset the improvement in the wet pressing efficiency originated from the polymer additives.
Preparation of Emulsion from Biodegradable Polymer (I) - Preparation of PLA and PBS Emulsions -
Lee, Min-Hyung ; Kim, Kang-Jae ; Eom, Tae-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 6, 2012, Pages 28~35
DOI : 10.7584/ktappi.2012.44.6.028
Water-in-oil emulsion (W/O) and oil-in-water emulsion (O/W) types biodegradable polymer emulsions prepared to PLA and PBS. The optimal mixing ratio of polymer : solvent : OA : TEA : water was found be 10 : 40 : 4 : 6 : 30(g) when preparing emulsions. Biodegradability was most retained after preparation of polymer emulsions. Particle size of PLA and PBS emulsions were 2-3
, respectively. Molecular weight of PLA and PBS emulsions were 108,000 and 92,000, respectively. And molecular weight of PLA and PBS emulsions became slightly lower than those of pellets.
Effects of Pre-treatments on the Oil Palm EFB Fibers
Kim, Dong-Seop ; Sung, Yong Joo ; Kim, Chul-Hwan ; Kim, Se-Bin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 6, 2012, Pages 36~42
DOI : 10.7584/ktappi.2012.44.6.036
The empty fruit bunch fibers(EFB) of oil palm were examined for optimal utilization of the EFB fibers. The EFB fibers were obtained by shredding EFB, followe by removal of fines. The surface properties of the fibers were modified with various pre-treatments, such as hot water extraction, the soaking treatments with NaOH,
and n-hexane. The changes in the fiber surface were examined with FT-IR method, which showed the changes in chemical compositions such as pectin, lignin, and etc. according to the pre-treatment methods. And the z-directional tensile testing of the fiber mold made of the treated EFB fibers showed the changes in the bonding strength by the pre-treatments. The fiber mold made of EFB fibers treated with
showed the greater increase in the tensile energy absorption although the NaOH treatment resulted in the severer impact on the EFB fibers.
Controllability of White Pitch and Compatibility of Micropolymer on PEO/Cofactor Retention System and PAM/Bentonite Retention System
Jung, Chul-Hun ; Lee, Jin-Ho ; Park, Jong-Moon ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 6, 2012, Pages 43~49
DOI : 10.7584/ktappi.2012.44.6.043
In this work, the non-ionic polyethylene oxide(PEO)/phenolic formaldehyde resin(PFR) retention system, which was less affected by furnish charge, was analyzed for possibility and effectiveness when using recycled stock. When the micropolymer was added at the PEO/PFR retention system and the PAM/bentonite retention system, performance of retention and drainage was improved. When the cationic micropolymer was added on the PEO/PFR retention system, the highest retention was achieved. The Polyacrylamide(PAM)/bentonite system induced flocculation of white pitch by electrostatic flocculation. On the other hand, the non-ionic PEO/PFR retention system induced less flocculation of white pitch than the PAM/bentonite retention system.
Optimal Organic Solvent Extraction Method for Dewaxing of Beeswax-treated Hanji
Choi, Do-Chim ; Choi, Eun-Yeon ; Jo, Byoung-Muk ; Cho, Byoung-Uk ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 6, 2012, Pages 50~57
DOI : 10.7584/ktappi.2012.44.6.050
In this study, the beeswax extraction methods using organic solvents were examined to develop a optimal dewaxing technology for beeswax-treated Hanji. Thermally-aged beeswax-treated Hanji was dewaxed using four types of extraction methods including dipping, Soxhlet extraction, ultrasonic washing and shaking methods. Then, the aging stability of the dewaxed Hanji was evaluated in terms of variations in paper strength and in the color of the printed area with muk. The experimental results suggested that the dewaxing methods allowing solvent to flow during extraction showed superior extraction efficiency. The dipping method in which the organic solvent does not flow showed the slowest extraction rate of beeswax compared to three other methods. In terms of variations in tensile strength and folding endurance, however, no obvious differences in the aging stability were observed amongst these four extraction methods. Regarding the aging stability in terms of the color of the printed area with muk, Soxhlet extraction method showed the best performance of dewaxing.
Evaluation of Recyclability of Fibrous Raw Materials from Scums in Papermaking Process
Kang, Kwang-Ho ; Kim, Hyoung-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 6, 2012, Pages 58~69
DOI : 10.7584/ktappi.2012.44.6.058
As the meaning of dictionary terminology, scum refers to a layer of impurities that accumulates at the surface of a liquid. In papermaking process, scum indicates the floated solid waste generated by a flotation process during the primary wastewater treatment. In this study, different kinds of stocks and scums collected from newspaper, liner, tissue and fine paper were analysed in details. The purpose of this study was firstly to demonstrate the composition characteristics of different sources of scum, secondly the analysis of environmental hazardous materials, and thirdly the evaluation of reutilization ability of fibrous materials from collected scum. As mentioned the meaning of solid waste, scum was actually differ from the waste sludge in sources, compositions and recycling abilities. In the same manner of waste paper, the sludge which is generated within onsite of papermaking processes would be reused as a raw material. The general compositions of scum from waste water were mainly inorganic ash materials, fine fibre fractions, recycled fibre debries, and ink particles. If the scum is able to reuse as fibrous additives in papermaking process, it could contribute to the savings of running costs in both the subsidiaries of fibrous material and the solid waste treatment with even small quantity.
Studies on Conservation of the Beeswax-treated Annals of Joseon Dynasty
Jeong, Hye Young ; Choi, Kyoung Hwa ; Lee, Kye Shik ; Jo, Byoung-Muk ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 6, 2012, Pages 70~78
DOI : 10.7584/ktappi.2012.44.6.070
The Annals of Joseon Dynasty, which recorded governmental affairs for 472 years (AD 1392-1863) during the Joseon dynasty is an representative paper cultural heritage in Korea. Being recognised their authenticity and values they were designated as the No 151 national treasure of Korea in 1973 and registered as 'The Memories of the World' by UNESCO in 1997. Unusually, some volumes of the Annals were treated by beeswax for the permanent preservation. However, the examinations on the deterioration of the beeswax-treated volumes had been exposed the serious damage than the untreated volumes. In particular, the larger amount of beeswax were worst in deterioration condition. In order to solve these problems, NRICH(National Research Institute of Cultural Heritage) of Korea launched the investigation study for the conservation of beeswax-treated volumes of the Annals. Now then, the five study areas have been set up; 1) to understand the damaged condition of the Annals; 2) to analyse the raw materials and production techniques; 3) to test the degradation degree using the duplication samples for understanding the aging factors and mechanism; 4) to develop the conservation techniques through dewaxing and thereafter strengthening the base paper of Hanji; 5) to develop the long-term storage technique using inert gases. On the basis of outcomes from this study, NRICH will plan to establish the systematic conservation and management plan for the beeswax-treated volumes of the Annals in future.
Introduction of the Advanced Imaging Materials -Micro-encapsulating Treatment of Toner-
Lee, Yong Kyu ; Jeong, Kyoung Mo ; Koseki, Ken'ichi ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 6, 2012, Pages 79~86
DOI : 10.7584/ktappi.2012.44.6.079
The aim of this general remarks is to introduce the results concerning the thermo physical, charging, developing and fusing characteristics of micro-encapsulated (MC) model toners in order to apply to the toner of electrophotographic system at the condition of a low temperature. In order to clarify the fusing mechanism of MC toner, rheological analysis of the toner was chosen. It was suggested that MC toner had a different fusing mechanism compared with non-MC toner. Some kinds of MC model toners showed a good result on adhesion test as well as cohesion test. Also, it was possible to get the good charging and development characteristic of MC toner for printing test with laser printer.