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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
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Journal DOI :
Korea Technical Association of the Pulp and Paper Industry
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Volume & Issues
Volume 43, Issue 5 - Dec 2011
Volume 43, Issue 4 - Dec 2011
Volume 43, Issue 3 - Sep 2011
Volume 43, Issue 2 - Jun 2011
Volume 43, Issue 1 - Mar 2011
Selecting the target year
Properties of Natural Dyeing of Bast Fiber(Part 3) Combination dyeing of gallnut-sappan wood and gardenia
Park, Myung-Ox ; Yoon, Seung-Lak ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 43, issue 1, 2011, Pages 1~10
To investigate the combination dyeing properties of natural dyes, the combination dyeing using gallnut,-Al, Cu, Fe-sappan wood, and gallnut-Al, Cu, Fe-gardenia was performed on bast fiber of mulberry, cotton, silk, and their K/S values, colors, and sunlight fastness were measured. The gallnut-Al, Cu, Fe-gardenia dyeing showed the highest K/S values when the dyeing concentration of gallnut is 3%. It tended to show the higher K/S values than gallnut-Al, Cu, Fe-sappan wood. The silk showed the highest values of in K/S, and then followed by cotton, and bast fiber of mulberry. The mordants developed different colors on the bast fiber and the cotton treated with gallnut-Al, Cu, Fe-sappan wood. However, the silk showed a series of YR, showing no effect of the mordants on the development of color. The combination dyeing of gallnut-Al, Cu, Fe-gardenia showed a series of Y. The results showed that sappan wood could develop various colors but gardenia could develop a series of Y. No distinct improvement on sunlight fastness of the combination dyeing was observed.
Studies on the Aging Behavior of Coated Paper(I) -Effect of latex on optical properties of coated paper during dry heat aging-
Kim, Sun-Kyung ; Cho, Byoung-Uk ; Lee, Yong-Kyu ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 43, issue 1, 2011, Pages 11~16
This study was carried out in order to elucidate the effect of latex dosage and properties on aging behavior of coated paper. The coated paper with five different coating formulations were prepared and also four different latices were used. The coated paper were thermally aged at
for 14 days and the optical properties were measured. Increasing latex content increased the magnitude of reduction in brightness and whiteness. In addition, the variations in CIE a
were larger with increasing latex dosage. Latex which has the lower gel content and the higher Tg showed the higher reduction in brightness and whiteness and much variation in CIE a
. However the particle size of latex didn't affect to thermal behavior of coated paper. These results indicate that latex which has higher Tg and lower gel content is the one of the main factors affecting aging behavior of coated paper.
Design of the Coated Layer Suitable with Conductive Ink for RFID(II) - Effect of coating color components on the surface resistance of conductivity ink -
Jung, Hae-Sung ; Kim, Chang-Geun ; Lee, Yong-Kyu ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 43, issue 1, 2011, Pages 17~22
The conventional coated paper has many functional problems for printed RFID tag. This study was carried out in order to evaluate the effect of coating color components on conductivity of printed coated paper. It has been well known that the efficiency of printed RFID tag is influenced by surface properties of substrate. The required properties for suitable substrate of printed RFID tag are high smoothness and waterproof property. In this study high grammage base paper surface sized with PVA was used. Coated paper was manufactured with five different formulations. Types of coating pigments and dosage of latex were varied. It was obtained high smoothness and also less binder demand with clay than GCC. On the other hand, suitable surface resistance and smoothness of coated paper for RFID tag was obtained with 20% of latex. Besides it shows the possibility of using coated paper for printed RFID tag.
Chemical Characteristics of Ozone Treated Pine Wood Meal
Kim, Kang-Jae ; Eom, Tae-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 43, issue 1, 2011, Pages 23~28
The pine wood meal was ozonated in acidic water. A 91.3% of lignin and 13% of polysaccharides in pine wood meal were degraded with 180 min ozonation. The phenolic hydroxyl groups of lignin in ozonated wood meals were increased with ozonation time. The vanillin content in nitrobenzene oxidation products of lignin is decreased with 10 min. ozonation and it was slightly increased with ozonation time. The sugar composition of ozonated wood meals showed that the hemicellulose was more susceptible to ozonation than cellulose. The crystallinity of ozonated wood meal was increased.
Chemical Characteristics of Ozone Treated Aspen Wood Meal
Kim, Kang-Jae ; Eom, Tae-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 43, issue 1, 2011, Pages 29~35
Since the role of lignin in the wood cell wall is to keep integrity and structure rigidity of lignocellulosic substrate, lignin of the cell wall has to be destroyed before enzymatic hydrolysis of wood polysaccharides. The aspen wood meals were delignified with ozone in acidic condition. The chemical characteristics of wood meal were investigated. The 60% of lignin and almost zero % of polysaccharides in aspen wood meal was degraded with 10min. ozone treatment. The phenolic hydroxyl groups of lignin in ozonated wood meal were increased with ozonation time. The sugar composition of ozonated wood meal showed that the hemicellulose was more susceptible to ozonation than cellulose. The yield of aldehyde was increased in some degree with 10min. ozone treatment and decreased with longer ozone treatment.
Manufacture of Colored Hanji for Interior Materials from Natural Pigments (Part 1) - Manufacture of Super Eight Colors Changhoji -
Jang, Hye-Mi ; Nam, Hyun-Ju ; Go, In-Hee ; Choi, Tea-Ho ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 43, issue 1, 2011, Pages 36~46
The purpose of this study was to manufacture colored Hanji for interior materials by combining color therapy and natural dyeing. To manufacture colored Changhoji for interior materials, seven species of dyestuff were selected as a results of preliminary natural dyeing. As mordants, 0.5%
solution were used respectively. To estimate natural dyeing properties of Changhoji, the value of
and Munsell HV/C were measured by spectrophotometer. The super eight colors produced as follows; red from safflower, orang from goldthread and gardenia, yellow from turmeric, green and turquoise from indigo and pagoda tree flower, violet and magenta from sappanwood, and blue from indigo.
Characteristics of the Hanji for Movable Types Printing Volumes of the Joseon Dynasty (Part 1) - Physical and Anatomical Properties of the Hanji -
Yoon, Yong-Hyeon ; Lee, Seung-Cheol ; Choi, Tea-Ho ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 43, issue 1, 2011, Pages 47~56
This study was carried out to investigate the characteristics of the Hanji which had been used for movable types printing volumes of the Joseon Dynasty. A total 29 volumes which had printed with metal and wooden movable types, were examined on the physical properties, fiber morphology, and color reactions. The grammage of all of the Hanji which had been used for movable types printing volumes were
and on the average was
. The apparent density of the Hanji was
and on the average was
. In almost all movable types printing volumes, the Hanji had undergone Dochim which is a processing of printability improvement. Through the examination on fiber morphology and color reactions, Hanji was investigated into that all of those were made from paper mulberry bast fiber.
Studies on the Application of Arrowroots for the Use of Paper Fiber (Part 1) - Anatomical and Chemical Properties of Arrowroots -
Jo, Hyun-Jin ; Yoon, Seung-Lak ; Hwang, Byung-Ho ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 43, issue 1, 2011, Pages 57~64
The purpose of this research is to investigate the anatomical and chemical properties of arrowroots for the use of paper fibers. The cells consisting of arrowroots showed certain affinities with those in the fibers and vessels of hardwood. Its parenchyma cells showed different shapes with those of hardwood. It was observed that starch was filled in the multi-shape cells. The average width and length of arrowroot fibers were
) and 1.9 mm (1.49 mm-2.31 mm), respectively. In the chemical characteristics of arrowroots, the contents of cold- and hot-water, alcohol-benzene, and alkali extractives were 12-17%, 15.6%, and 38.8%, respectively. Its chemical composition was 61.3% holocellulose, 15.5% lignin and 2.0% ash.
Considerations of Acid Decomposition System for the Analysis of Heavy Metals in Packaging-grade Paper
Lee, Tai-Ju ; Ko, Seung-Tae ; Kim, Hyoung-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 43, issue 1, 2011, Pages 65~73
The fibrous raw materials in packaging-grade paper production in Korea were mainly obtained from waste paper. The use of recycled paper has both positive and negative impacts in papermaking process. The primary positive impacts are the environmental protection and manufacturing cost reduction, and the negative impacts are the quality reduction in paper quality and the accumulation of heavy metals and other pollutants in wet- and dry-end process. This study was carried out to consider the optimum acid decomposition system with the highest recovery rate for the analysis of heavy metals in packaging-grade paper. The open digestion system using Kjeldahl apparatus and the closed digestion system using microwave oven for decomposing the organic materials in paper were compared. In both open and closed digestion method, the combination of nitric acid, hydrochloric acid and hydrogen peroxide showed higher recovery rate than using only nitric acid alone because the presence of Cl- ions in hydrochloric acid stabilizes ligand formation with metal ions. KOCC was observed to have the highest heavy metal content among the recycled paper samples. The heavy metal contents decomposed with the closed digestion system were relatively higher than with open digestion system.
Component Analysis of Paper Mulberry Bark for the Automation of Bark Peeling Process
Seo, Jin-Ho ; Kim, Hyoung-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 43, issue 1, 2011, Pages 74~82
The bast fiber of Paper mulberry has been generally used as a fibrous raw material in traditional Hanji-making. Nowadays, its uses is expanded to different special purposes such as paper mulberry yarn, laminated paper, antimicrobial paper depending on its application. Despite the wide array of the use of mulberry fibers, it is still limited due to some difficulties in the automation process of manufacturing works. This study is focused on the analysis of chemical components and morphological properties of paper mulberry bark for the automation of bark peeling process. The bast tissue of paper mulberry was separated in three plies; black outer layer, green inner layer, and white inner layer. The total lignin content, holocelluloses, extractives and ashes, and the anatomical structure of the three layers in mulberry bark tissue were investigated. The analysis showed that the black outer layer is composed of about 50% of total lignin content, whereas the white inner layer is composed of about 90% of holocellulose content.
Pre-extraction of Hemicelluloses from Korean Mixed Hardwood Chips Using Hot Water and Alkali Solution and its Characteristics
Cho, Hwi ; Shin, Hee-Nae ; Sim, Kyu-Jeong ; Youn, Hye-Jung ; Lee, Hak-Lae ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 43, issue 1, 2011, Pages 83~91
Hemicelluloses are useful materials for papermaking and other biotechnological applications. To recover and further utilize the hemicelluloses, this study carried out the pre-extraction of the hemicelluloses from Korean mixed hardwoods chips using hot water and sodium hydroxide solution at various temperature and time conditions. Through the hot water pre-extraction, the wood components of 22% was extracted and the 35% of the hemicelluloses which were contained in the original wood chips were dissolved into the pre-extractives. The yield of the pre-extractives was more significantly influenced by the pre-extraction temperature than the time. The pre-extractives with the yield of 30% could be obtained by alkali pre-extraction and alkali concentration was the most important factor. It had lower hemicellulose content but high molecular weight, compared with the hot water pre-extractives.