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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
Influence of Organic Pigment Blending on Surface and Optical Properties of Coated Paper
Jeong, Kyoung-Mo ; Won, Jong-Myoung ; Lee, Yong-Kyu ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 3, 2012, Pages 1~8
DOI : 10.7584/ktappi.2012.44.3.001
The effects of several factors including organic pigment blending and calending conditions on the surface and optical properties of coated paper were investigated. When clay and calcium carbonate are blended in the ratio of 7 to 3, highest smoothness and relative sediment volume were obtained. When organic pigments were added to the mixture of clay and calcium carbonate, the relative sediment volume did not changed significantly. However, when organic pigments were added to calcium carbonate, sheet gloss and smoothness were improved, and showed the better results than that obtained from the mixture of organic pigment and clay. When organic pigment is blended with clay, the particles of organic pigment are buried in the packing structure of coating layer. However, the particle shape of calcium carbonate is quite different from that of clay, and the aspect ratio of calcium carbonate is similar to that of organic pigment. Thus organic pigment particles are not buried and improved effectively the physical characteristics of coating layer. When the hollow sphere pigment was blended, opacity and sheet gloss were improved significantly. Even though the coating color applied was reduced, the similar level of opacity was maintained. Also, if particle size and void volume are increased, gloss is improved, because coating layer is easily transformed in calendering. Therefore, even though lower pressure was applied during calendering, the smoothness of surface of coating layer was improved, and the decrease of void volume in coating layer was reduced, and the quality of coated sheet can be improved.
Characteristics of xylose and glucuronic acid at concentrated sulfuric acid hydrolysis
Cho, Dae-Haeng ; Kim, Yong-Hwan ; Park, Jong-Moon ; Sim, Jae-Hoon ; Kim, Byung-Ro ; Shin, Soo-Jeong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 3, 2012, Pages 9~14
DOI : 10.7584/ktappi.2012.44.3.009
Formed fermentation inhibitors during acid saccharification leads to poor alcohol production based on lignocellulosic bio-alcohol production process. In this work, it is focused on the formation of fermentation inhibitors from xylan, which is influenced by reaction tempearature and time of acidic sacharifiaction of xylose and glucuronic acid. In second step of concentrated acid hydrolysis, part of xylose and glucuronic acid was converted to furfuraldehyde and formic acid by dehydration and rearrangement reactions. Furfural was form from xylose, which was highly sensitive to reaction temperature. Formic acid was come from both xylose and glucuronic acid, which supposed to main inhibitor in biobutanol fermentation. Reaction temperature of second hydrolysis was main variables to control the furfural and formic acid generation. Careful control of acid saccharification can reduce generation of harmful inhibitors, especially second step of concentrated sulfuric acid hydrolysis process.
Effect of Dewaxing Ratio of Beeswax-treated Hanji by Heat and Pressure Method on Aging Behavior of Dewaxed Hanji
Cho, Byoung-Uk ; Choi, Do-Chim ; Jo, Byoung-Muk ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 3, 2012, Pages 15~21
DOI : 10.7584/ktappi.2012.44.3.015
The optimum dewaxing ratio in dewaxing treatment by the heat and pressure method was investigated by considering aging stability of dewaxed Hanji. Commercial Hanji was coated with beeswax and thermally aged at
for 24 hours. Then it was dewaxed using the laboratory sheet press equipped with hot plates on both top and bottom sides. Dewaxing ratio was controlled by pressing temperature and time. Four type of dewaxed Hanji samples with different dewaxing ratio were prepared and thermally aged at
. Then the aging stability of dewaxed Hanji samples was evaluated in terms of optical and strength properties. It was found that the aging stability of dewaxed Hanji was superior with higher dewaxing ratio. The result concluded that, in the aspect of aging stability, the coated beeswax in beeswax-treated Hanji shall be completely removed if the coated wax would be dewaxed.
Characteristics of the Lining Papers Separated from the 18th Century Paintings and Calligraphic Works (Part 1) - Physical and Morphological Properties of Lining Papers -
Jeong, Hee-Won ; Lee, Sang-Hyeon ; Cheon, Ju-Hyun ; Choi, Tae-Ho ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 3, 2012, Pages 22~33
DOI : 10.7584/ktappi.2012.44.3.022
This study was carried out to investigate the characteristics of the lining papers which had been separated from six pieces of paintings and calligraphic works of the 18th and the 20th century. A total 20 kinds of lining papers were examined on the physical properties, colors, fiber morphology, and color reactions. The grammage and thickness of lining papers which had been used hanging-scroll type works were higher than those of folder types. On the other hand, the grammage and thickness of the first layer lining papers which had been separated from silk ground works were lower than those of paper ground works. All kinds of lining papers were colored from yellow to yellowish red because of unbleaching and deterioration. Through the examination on fiber morphology and color reactions, lining papers were verified that all of those were made from paper mulberry bast fiber but the first layer of the Mukjukdo. The lining paper which of the first layer of the Mukjukdo was verified that it was made from mixture of paper mulberry, hemp, and spruce pulps.
Development of new antibacterial materials for manufacturing functional corrugated board for agricultural products
Yoon, Hee-Youl ; Oh, Seok-Ju ; Lee, Ji-Young ; Kim, Byeong-Ho ; Lim, Gi-Baek ; Choi, Jae-Sung ; Kim, Sun-Young ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 3, 2012, Pages 34~40
DOI : 10.7584/ktappi.2012.44.3.034
In this study, new antibacterial materials were developed to manufacture a functional corrugated board. Sulfur solution, a new antibacterial solution made from inorganic sulfur in the laboratory, and other antibacterial mat erials were adopted to treat the surface of a linerboard. We measured the antibacteriocidal and bacteriostatic activities, as well as the fungal resistance of the surface-treated linerboards, to identify the antibacterial properties. The mechanical properties of the surface-treated linerboard were also determined in order to identify the effects of the antibacterial materials on linerboard properties. Linerboard treated with sulfur solution, PVOH, and sodium metasulfite showed the highest antibacterial activity, while linerboard treated with sulfur solution and nano sulfur showed the highest fungal resistance. It was identified that sulfur solution has effective antibacterial properties. The antibacterial materials did not affect the mechanical properties of the surface-treated linerboard, but the binder showed significant effects in terms of the burst strength, the compressive strength, and the stiffness of the linerboard.
The Study of the Printability on the Phenol Free Heat-Set Web Inks(II) - Analysis by the trial printing test -
Ha, Young-Baeck ; Oh, Sung-Sang ; Lee, Won-Jae ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 3, 2012, Pages 41~48
DOI : 10.7584/ktappi.2012.44.3.041
Materials used for the inks in the printing industry is an important material following the paper. The composition of the ink is pigment and organic solvents. However, Ink is used in a variety of chemicals, they are classified as non-green. Therefore, rosin-modified phenolics manufactured by the reaction of phenol and formaldehyde can take the place of eco-phenol free resin and by experiment density, gloss, trapping, contrast and dot gain of printing has been studied as printability. The result of study can support that the properties of printing using eco-phenol free resin such as density, gloss, contrast and trapping is similar to existing ink. In the part of dot gain, the result is excellent. So we were thought to be able to improve some characteristics such as dispersion of black ink, that will be possible for the field applicability.
Development of nonwoven fabric and new adhesive system to manufacture hybrid corrugated board
Lee, Ji-Young ; Yoon, Hee-Youl ; Oh, Seok-Ju ; Sung, Yong-Joo ; Kim, Byeong-Ho ; Lim, Gi-Baek ; Choi, Jae-Sung ; Kim, Sun-Young ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 3, 2012, Pages 49~55
DOI : 10.7584/ktappi.2012.44.3.049
Even though corrugated boards are the most common packaging materials for agricultural products, conventional corrugated boards are not able to maintain the freshness of agricultural products. In order to overcome the limitations of conventional corrugated boards, a new hybrid corrugated board-composed of linerboard, a corrugating medium, and non-woven fabric-was designed to possess antibacterial, high porous and shock-absorbing properties. In this study, we compared the physical properties of non-woven fabric to those of the base papers of conventional corrugated boards and developed a new adhesive system as a first step toward manufacturing the hybrid corrugated board. We found that the non-woven fabric, which had relatively high elongation, was applicable in the corrugated board process, and that the manufacturing conditions must be controlled in order to prevent the break of the non-woven fabric. The mixture of starch and styrene-butadiene (SB) latex showed high adhesive strength, but the addition level of SB latex should not exceed 30% in starch solution.
Effects of the Use of Recycled Pulp on the Print Quality of Textbook Paper
Ha, Young-Baeck ; Kim, Chang-Keun ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 3, 2012, Pages 56~62
DOI : 10.7584/ktappi.2012.44.3.056
Recycled pulp therefore play a very important role in the paper industry today as a substitute for virgin pulp. In many countries of the world, the paper industry could not exist as it does without recycled pulp. Because, this is mainly due to economic reasons. Particularly in our country, the additional reason is the scarcity of native pulpwood resources. Therefore, the use of recycled pulp is very important. This study was aimed to apply recycled pulp to textbook paper. So we made a paper containing 30% recycled pulp and investigated about print quality, such as color reproduction, trapping, contrast, dot gain, gloss and print through. The results showed that is similar to existing textbook papers.
Study of Rice Husk Pulping for utilization of Rice Husk Fiber
Oh, Min-Taek ; Sun, Yong-Joo ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 3, 2012, Pages 63~69
DOI : 10.7584/ktappi.2012.44.3.063
The rice husk is one of the major agricultural residue in KOREA. In this paper, the effects of various pulping conditions on the properties of rice husk pulp and handsheets made of rice husk fiber were evaluated in order to utilize the rice husk as an alternative source for wood pulp. Two typical alkali pulping, such as soda pulping and Kraft pulping were applied with various conditions of the pulping processes. The higher effective alkali and higher pulping temperature resulted in the higher efficiency in removal of lignin and ash, which leaded to the higher strength properties of handsheets made of rice husk fiber, but the lower yield of rice husk pulp. The better efficiency in production of rice husk pulp and the stronger handsheets were obtained by the Kraft pulping.
Effects of Temperature and Relative Humidity on the Physical Properties of Electronic Copying Paper
Kang, Kwang-Ho ; Kim, Hyoung-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 3, 2012, Pages 70~78
DOI : 10.7584/ktappi.2012.44.3.070
For evaluating the printing suitability of electronic copying papers in the aspect of climate conditions, 12 samples of copying papers being generally used in Korea and worldwide were collected. The copying papers were controlled by various temperature and humidity options in conditioning equipment in order to simulate the specific circumstances of dry, temperate or tropical climate, and the pre-heating system of photocopying machines during printing. As results, some copying papers showed several physical problems, especially in recycled copying papers and a normal paper with original printing faulty. These problems of copying papers were mostly resulted in extremely high moisture circumstance, and in lower levels of tensile strength and tensile stiffness. The moisture contents of copying papers during passing through the pre-heater system of photocopying machine could be rapidly decreased because paper is exposed to high temperature around the pre-heating zone. The copying paper, for example of XR3 sample, containing low moisture contents below 2% had high exfoliating possibility of toner transfer from copying paper.
Preparations Purified Cellulose from Rice Hull
Lee, Young-Ju ; Sung, Yong-Joo ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 3, 2012, Pages 79~85
DOI : 10.7584/ktappi.2012.44.3.079
In this study, purified cellulose was prepared from rice husk which is one of the major agricultural residues in Korea. The various bleaching processes such as ozone bleaching,
bleaching were applied to remove residual lignin and impurities. In order to increase the contents of
-cellulose contents, the effects of acid and alkali treatments were evaluated. Although the multi stages of the bleaching processes resulted in less than 0.5 % residual lignin contents, the application of ozone leaded to the decrease in DP(degree in Polymerization) and
-cellulose contents. The alkali treatment after bleaching processes resulted in pure cellulose which showed more than 98% of