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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 46, Issue 6 - Dec 2014
Volume 46, Issue 5 - Oct 2014
Volume 46, Issue 4 - Aug 2014
Volume 46, Issue 3 - Jun 2014
Volume 46, Issue 2 - Apr 2014
Volume 46, Issue 1 - Feb 2014
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Sizing Efficiency of AKD in Causticizing Calcium Carbonate Filled Paper
Wang, Jian ; Liu, Ling ; Xu, Yong-Jian ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 2, 2014, Pages 1~7
DOI : 10.7584/ktappi.2014.46.2.001
Causticizing calcium carbonate (CCC) is produced as a by-product in the causticization step of the kraft pulping process. It is often calcined in a rotary lime kiln after being dewatered and reused in the causticizing process. But for the China mill, the conventional recycled way is difficult because the CCC is mainly obtained from non-wood pulping materials, which higher silicon content led to serious silicon obstacle. So it is often discarded as solid waste or used in landfill after dewatering and secondary pollution is brought. In order to prevent its secondary pollution, recent years, the CCC is used as a filler in China papermaking industry. In mill trials, the CCC can be used to replace an amount of precipitated calcium carbonate (PCC). Unfortunately, the application scope and dosage of CCC have been limited due to its lower sizing efficiency than PCC. In this study, the reason for the lower sizing efficiency of alkyl ketene dimer (AKD) when CCC was used as a filler was investigated. The results showed that the materials in green liquid, such as insoluble matter in green liquid, silicon and metal ions, were a little influence on the sizing efficiency of AKD. The higher BET and BJH pore volume of the CCC were the main reason for lower sizing efficiency of AKD when it was used as filler.
A Study of Antibacterial Paper Packaging Material Coated with Chitosan-Ag Nanocomposite Prepared by Green Synthesis
Kyung, Gyusun ; Ko, Seonghyuk ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 2, 2014, Pages 8~15
DOI : 10.7584/ktappi.2014.46.2.008
A novel antibacterial paper coated with chitosan-based silver (Ag) nanocomposite prepared by green synthesis has been investigated for a wide range of application in food, agricultural and medical packaging. Green synthesis of Ag nanoparticles (AgNPs) was carried out by a chemical reaction involving a mixture of chitosan-silver nitrate (AgNO3) in an autoclave at 15 psi,
, for 15-120 sec. AgNPs and their formation in chitosan were confirmed by both UV-Vis spectroscopy and transmission electron microscope (TEM). Fourier transform infrared spectroscopy (FTIR) study showed that free amino groups in chitosan act as an effective reductant and AgNPs stabilizer. Antibacterial test of coated paper with as-prepared chitosan-AgNPs was performed qualitatively against E. coli based on the formation of halo zones around coated papers and it was shown to be effective in suppressing the growth of E. coli with increasing Ag contents in coating layer.
Investigation of Coating Color Penetration depending on the Properties of Base Paper
Kim, Bong Yong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 2, 2014, Pages 16~21
DOI : 10.7584/ktappi.2014.46.2.016
Characteristics of coating color penetration into paper were elucidated using various types of pulps and pigments. A commercial paper, KP and TMP handsheets were used for base paper. Clay and GCC were used as coating pigment. Laboratory rod draw down coater was used for coating application. Coating color penetration was evaluated by measuring the roughness of surface and back side of a coating layer. The results of coating roughness showed that clay was much better than GCC as a coating pigment. In case of pulp type, KP base paper was more effective than TMP base paper to reduce coating penetration.
Evaluation of Conservation Conditions of Nara National Archives Documents
Lee, Sang Kyu ; Shin, Kwang Hyun ; Kim, Hojin ; Shin, Hyun Chang ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 2, 2014, Pages 22~29
DOI : 10.7584/ktappi.2014.46.2.022
Many government agencies have used domestic deacidification equipments to stabilize archives; however, no agency has verified archives' current preservative status. We studied the Nara National Archives' documents that had treated by mass deacidification process from 2001 to 2012, in order to examine the documents' preservative status and how efficient the mass deacidification has been. Approximately 1% of total 112,970 Nara National Archives' documents treated by mass deacidification were randomly selected and evaluated on their current measure of acidity and color change. Regardless of the kinds of document material, a wide range of pH level was found. Especially those documents that were treated by mass deacidification equipment after 2006 showed acidic conditions that were less than pH 6.8 level. Those documents were probably not treated properly by deacidifying chemical because of tightly packing style. The current measures of acidity and color records will be useful as a reference for future evaluations of further decay of the documents. It was the first study to evaluate acidity and color conditions of Nara National Archives' documents treated by mass deacidification equipment. We concluded that when using mass deacidification equipment, archives should not be loaded tightly in order for them to be fully in contact with deacidifying chemical.
The Analysis of Inorganic Compounds and Water Solubles Ions in Paper Mill Sludges from NewsPaper and Printed Paper
Yoon, Su Young ; Kim, Un-Jung ; Kim, Mi-Seon ; Kim, Mun-Sung ; Park, Jong-Moon ; Shin, Soo-Jeong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 2, 2014, Pages 30~34
DOI : 10.7584/ktappi.2014.46.2.030
To apply paper mill sludges to soil as fertilizer, paper mill sludges were investigated to predict suitability and maleficence for soil. Newspaper and Printed Paper sludge were analyzed by IC (Ion Chromatography) and ICP-OES (Induced Coupled Plasma Optical Emission Spectrometer). As a results, harmful materials in two types of sludges were below standard by notified Ministy of Environment (ME). Also ionic substances causing the water pollution in sludges were less than the standard value by notified ME. Thus sludges from newspaper and printed paper is presumed that there are no water pollution and soil contamination.
Analysis of External Fibrillation of Fiber by Confocal Reflection Microscopy
Kwon, Ohkyung ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 2, 2014, Pages 35~45
DOI : 10.7584/ktappi.2014.46.2.035
Confocal Reflection Microscopy (CRM) was applied to investigate external fibrillation of different types of fibers such as Kajaani reference fiber, Whatman filter fiber, thermomechanical pulp (TMP), and recycled TMP fiber. It was confirmed that the CRM images are created from surface structures of the fiber cell wall. Confocal Laser Scanning Microscopy (CLSM) captured overall shape of the fiber, but minute details of the surface of the fiber were missed. CRM captured the minute details of the fiber surface. From the CRM and CLSM images, it was observed that the CRM images mainly appeared on the fiber surfaces. External fibrillation of the fiber occurs at the fiber surface, not inside the cell wall. Thus, it was concluded that investigation on the external fibrillation of the fiber was possible by utilizing CRM images. A direct qualtitative and quantitative method for analysis of external fibrillation of fiber was demonstrated by utilizing surface area to volume ratio, volume fraction, and roughness calculated from 3-dimensional images reconstructed from stacks of CRM images from the different fibers.
Review : The Advanced Inkjet Printing Technology - UV curable Jet Ink -
Jeong, Kyoung Mo ; Won, Jong Myung ; Lee, Yong Kyu ; Koseki, Ken'ichi ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 46, issue 2, 2014, Pages 46~56
DOI : 10.7584/ktappi.2014.46.2.046
The aim of this reviews is to introduce the information concerning design of the UV-curable jet ink composition in order to provide a good adhesive property on non-porous surface. In order to clarify the viscosity dependence of flying speed for the UV curable jet ink, rheological analysis and observation of the flying state of the ink were carried out. The relationship between ink formulas and adhesive property on non-porous surface was investigated. It was examined the adhesive property of radical polymerization type UV curable jet ink included hydrogen abstraction type photo-initiator, it was expected that the strong adhesive strength can be obtained between the ink and non-porous surface in this study. UV curable jet ink with a slight amount of water was prepared. Optimum ratio of the cationic polymerization type UV curable jet ink shows an adequate adhesive strength towards two kinds of non-porous surface such as glass, poly(vinyl chloride) when tests were conducted on the ink jet-printing test machine.