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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 42, Issue 5 - Dec 2010
Volume 42, Issue 4 - Dec 2010
Volume 42, Issue 3 - Sep 2010
Volume 42, Issue 2 - Jun 2010
Volume 42, Issue 1 - Mar 2010
Selecting the target year
Studies on the Screening of Fixing agent for Deposit Control of ONP Stock
Lee, Kwang-Pyo ; Ryu, Jeong-Yong ; Song, Bong-Keun ; Jeong, Seong-Hyeon ; Park, Jong-Moon ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 3, 2010, Pages 1~6
A new testing method named pitch deposit tester (PDT) was developed by KRICT in order to evaluate the deposit potential of micro-stickies. The new method involves depositing the potential pitch particles on the air bubble covered plastic film set in the pitch deposit tester (PDT) and analysing the deposited area by an image analyzer. In this study, the effect of fixing agents on potential pitch deposition was elucidated. The effects of some fixing agents (polyamine and polyethyleneimine) on pitch control were investigated by the PDT test of 100% recycled newsprint stock. The study suggested that proper use of the PEI can lead to better pitch control than that of polyamine. The efficiency of novel screening method using the PDT and retention and drainage analyser (RDA) for fixing agents in terms of retention and deposit contamination could be confirmed by above mentioned results.
An Instance of Selecting Retention Chemicals Based on Simultaneous Analysis of Retention, Drainage and Formation of RDA (Retention and Drainage Analyzer) Sheets
Jeon, Chang-Hoon ; Ryu, Jeong-Yong ; Song, Bong-Keun ; Seo, Young-Bum ; Chung, Sung-Hyun ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 3, 2010, Pages 7~13
KOptimization and control of wet-end process provide a key solution to improve paper quality and production efficiency at the same time. Wet-end of paper machine is to determine three important influencing factors of papermaking i.e., retention, drainage and formation. Good formation of paper could be made at the cost of deteriorated retention or drainage. In the same manner increase of retention aid could cause the bad formation of paper. It is very important to find a proper retention chemical which may satisfy one of three factors without the sacrifice of other two. Laboratory scale analyzing or screening chemical additives of wet-end was reported in this study based on RDA sheet molding. Different from the conventional test method, simultaneous consideration of three important wet-end properties could be made by RDA and consequently more reliable prediction of actual paper machine wet-end could be expected.
Sugar Extraction by Pretreatment and Soda Pulping from Cattail (Typhaceae) (2) Pulping Characteristics
Kim, Wan-Jung ; Lee, Sung-Eun ; Seo, Yung-Bum ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 3, 2010, Pages 14~21
Three different species of cattails (Typha orientalis, Typha angustata, Typha latifolia) cultivated in South Korea were examined as raw materials for the production of pulp and paper. Soda pulping with anthraquinone was used for the stems and the leaves of cattail, separately. Addition of anthraquinone in soda pulping improved the yield greatly. Chemical components between three cattail species and within each species (leaves and stem) gave little differences. Average fiber length of the bleached cattail fibers was a little shorter than that of the HwBKP of Eucalyptus. Average fiber width of the cattail fibers was a half of that of the HwBKP. Compared to the HwBKP, cattail pulp gave higher breaking length, higher opacity, and better smoothness at equivalent freeness.
Comparison of the soda-anthraquinone pulping properties between imported Eucalyptus mixture chips and domestic yellow poplar (Liriodendron tulipifera)chips
Sung, Yong-Joo ; Lee, Joon-Woo ; Kim, Se-Bin ; Shin, Soo-Jeong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 3, 2010, Pages 22~27
Pulping properties of the imported mixed eucalyptus chips and the domestic yellow poplar chips were investigated for comparing two chips as the raw materials for the hardwood chemical pulp. Soda-AQ (anthraquinone) pulping was applied for this study. The pulp from yellow poplar showed higher pulp yield than pulp from mixed eucalyptus, which comes from the lower hot-water soluble extractives and the higher polysaccharides in yellow poplar chips than those of the mixed eucalyptus chips. The yellow poplar pulp had higher average fiber length and fiber width than those of the mixed eucalyptus pulp, which led to the better respond to beating and the higher tear strength than those of the pulp from the mixed eucalyptus chips.
Non-Constructive analysis for the cover and inner paper in the Taebaeksan volume of Joseon Dynasty annals
Cho, Jung-Hye ; Kim, Kang-Jae ; Eom, Tae-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 3, 2010, Pages 28~36
Today We have three full series of the annals of Joseon Dynasty. Taebaeksan volume which is one of them shows comparatively good maintenance but Taebaeksan volume also decomposed in patches. The size of cover and inner paper were increased in late Joseon Dynasty, but the weight, thickness and basis weight bears no relation to each other. The oxidation index of paper in annals of pre-periods of King Sunjo shows very high value. After the annals of King Sunjo, the oxidation index of paper is very similar to today's Hanji. L.a.b values of inner paper in the Taebaeksan volume are similar generally. The average length of fiber using image analysis soft ware is 8.08~9.92 mm, that like immediate value of measurement. The air fraction of fiber's range is 1.20~2.12%. It lower than today's Hanji. After considering the factors of the length of fiber, air fraction and FE-SEM, we reached that no difference between raw material of inner paper in the Taebaeksan volume.
Effects of relative humidity on the physical properties of PVA impregnated paper
Kim, Tae-Young ; Joung, Yang-Jin ; Kim, Du-Ki ; Heo, Yong-Dae ; Sung, Yong-Joo ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 3, 2010, Pages 37~42
The properties of paper are very susceptible to moisture content originated from relative humidity. This propensity of PVA impregnated paper was investigated in this study. Especially the hardening effect of borax treatment after PVA impregnation on the response of paper sample to the relative humidity was evaluated. When the moisture content was increased with the relative humidity, tensile stretch and tear resistance were increased while tensile strength and stiffness were decreased. A great increase in folding endurance of PVA impregnated paper sample was found at the higher relative humidity. The borax treatment could reduce the response of PVA impregated paper to the relative humidity.
The Effect of Gamma ray irradiation on Paper Properties
Jeong, Hye-Young ; Choi, Kyoung-Hwa ; Park, Ji-Hee ; Jung, Pil-Mun ; Choi, Jong-Il ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 3, 2010, Pages 43~49
Recently, the use of fumigants for pest control of paper cultural heritages are limited because of the high toxicity of fumigants and the production of environment-harmfully compounds. Therefore, many non-chemical methods have been discussed and experimented. And it is recently focused on gamma radiation, which is one of non-chemical methods, for pest control of paper cultural heritage in Korea. In this paper, we carried out a gamma ray irradiation of papers including Hanji, copy paper, filter paper and then analyzed a physical properties and optical properties of paper sample to estimate the effect of gamma ray irradiation on paper properties. In result, gamma radiation have adverse effect on a physical properties and optical properties of paper, especially Hanji. Therefore, we have to carefully consider about using of gamma ray for pest control of paper cultural heritages.
Application of Cationic PVAm - Anionic PAM Dry Strength Aids System on a Kraft Paper Mill
Cho, Byoung-Uk ; Ryu, Jeong-Yong ; Son, Dong-Jin ; Song, Bong-Keun ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 3, 2010, Pages 50~57
A mill trial was performed in a kraft paper mill in order to evaluate the possibility of utilizing dual polymer dry strength aids system consisting of cationic PVAm and anionic PAM. It was found that the cationic PVAm - anionic PAM dry strength additives can improve paper strength without significantly disturbing the stability of the kraft papermaking process when virgin UKP was used as a furnish. Tensile strength (25.3% in machine direction, 48.4% in cross machine direction), elongation of paper (31.6%, 15.6%) and tensile energy absorption (48%, 54%) were improved. Air permeability of the kraft paper was improved as well (22%). Tear strength was decreased with PVAm dry strength aids system, but it can be compensated with decreasing refining degree. In addition, the mill trial results indicate that highly air permeable kraft sack paper can be produced by the addition of PVAm dry strength agents at the stock with reduced freeness.
Evaluation of the Beeswax Applying and Dewaxing Technique of Hanji, and Their Ageing Behaviors
Kang, Kwang-Ho ; Lee, Geum-Ja ; Kim, Hyoung-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 3, 2010, Pages 58~66
The Annals of beeswax applied-Joseon Dynasty have some serious damages such as cracks, brown, red or black spots, and discolorations by chemical and biological degradation, but others without any beeswax application have still been keeping good quality during over several hundred years. It would be convinced that the beeswax applied in the Annals resulted in these deteriorations. Therefore, in order to focus on the aging mechanism and conservation techniques for the beeswax-applied Annals of Joseon Dynasty, the beeswax applying and dewaxing techniques of Hanji were tried by auto bar coater with a hot plate, and by heat-pressure sensitive extracting treatments. The ageing behaviors of beeswaxed Hanji and dewaxed Hanji were investigated by measuring the changes of physical, optical, morphological, and chemical properties, through accelerated ageing treatment in dry oven at
during 48 hours. Consequently, the ageing actions of beeswaxed Hanji were even faster than that of Hanji. The optimum dewaxed amounts from beeswaxed Hanji was also obtained in pressure of
under heating conditions.
Enzymatic hydrolysis and micro-structure of ozone treated wood meal
Kim, Kang-Jae ; Eom, Tae-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 3, 2010, Pages 67~73
Pine (Pinus densiflora) and aspen (Populus euramericana) wood meals were treated with ozone at various time schedule in acidic condition. The lignin contents and surface area of the ozone treated wood meals were determined and the enzymatic hydrolysis rate of ozonated wood meals was evaluated. The feasibility of enzymatic hydrolysis of the ozone treated wood meal was obviously influenced with the degree of delignification. After ozone treatment of wood meal for 10min, total pore volume were slightly increased in the surface of wood meal. When wood meals were treated with ozone longer than 10min, few change in the pore volume was observed. However, the area of over
of pore size is increased with ozonation time. As a conclusion, the rate of enzymatic hydrolysis of wood is more effective with the pore size distribution than the total pore volume.