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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 45, Issue 6 - Dec 2013
Volume 45, Issue 5 - Oct 2013
Volume 45, Issue 4 - Aug 2013
Volume 45, Issue 3 - Jun 2013
Volume 45, Issue 2 - Apr 2013
Volume 45, Issue 1 - Feb 2013
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Effect of PVOH or polyDADMAC Addition on Surface Sizing with Oxidized Starch
Seo, Dongil ; Jeong, Young Bin ; Jeong, Kwang Ho ; Lee, Hak Lae ; Youn, Hye Jung ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 4, 2013, Pages 1~8
DOI : 10.7584/ktappi.2013.45.4.001
High loading of printing and writing grades with fillers has many advantageous aspects in papermaking because it allows decreasing fiber use and reducing manufacturing cost. High loading technology, however, has some disadvantageous aspects as well. It decreases physical properties of papers, especially strength properties. The problem associated with high loading can be reduced by applying surface sizing starch solution onto paper surface. It is important to control the penetration of the surface sizing starch solution into paper web to obtain the desired property improvement. In this study, the effect of the addition of two polymers into starch solution on paper properties has been examined. PVOH and polyDADMAC were used as polymeric additives for surface sizing with oxidized starch. Viscosity of starch solutions and surface roughness of dried starch films on glass slides showed that some interactions between polymeric additives and oxidized starch have been occurred and the most extensive interaction with starch solution was obtained with high molecular weight polyDADMAC. Low molecular weight PVOH was most effective in improving folding endurance and internal bond strength. On the other hand, polymer addition showed no effect on surface strength of paper. This indicates that not the level of starch holdout but the bonding strength of starch itself has predominant influence on surface strength of paper.
Reduction of Drying Energy for After Dryers Using Oxidized Starch Ester
Jeong, Young Bin ; Lee, Hak Lae ; Youn, Hye Jung ; Jung, Kwang Ho ; Ji, Kyoung Rak ; Kim, Young Seok ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 4, 2013, Pages 9~15
DOI : 10.7584/ktappi.2013.45.4.009
An oxidized starch ester was prepared and used for surface sizing. Esterification of starch decreased both Brookfield viscosity and Brabender viscosity substantially even though the solids level was increased by 2% from 14% to 16%. Surface sizing with the esterified starch gave better performance in tensile strength, stiffness and compressive strength than surface sizing with oxidized starch in the laboratory. Advantages in strength improvement, however, were not obtained when it was applied in commercial papermaking process. This was attributed to the fact that the influence of starch types has been nullified by high pressure penetration that occurs in the commercial papermaking process. Drying energy consumption, however, decreased by 3.3% by substituting the low solids oxidized starch with a high solids starch ester.
Yellow poplar (Liriodendron tulipiferaL.)grown in Korea versus imported Eucalyptus globules as a raw material for kraft pulping
Kim, Mun-Sung ; Shin, Soo-Jeong ; Park, Jong-Moon ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 4, 2013, Pages 16~20
DOI : 10.7584/ktappi.2013.45.4.016
Yellow poplar grown in Korea and imported eucalyptus were compared their kraft pulping characteristics and evaluated the replacing possibility of eucalyptus by yellow poplar. Difference between yellow poplar and eucalyptus were investigated in chemical composition and fiber morphology. Yellow poplar kraft pulp resulted in the higher yield, longer fiber length and thicker fiber, and higher pulp strength than that of eucalyptus. More xylan survived in eucalyptus than yellow poplar during kraft pulping, which led to similar pulp yield even though polysaccharides in Eucalyptus was 4.5% less than in yellow poplar. Longer and thicker yellow poplar pulp fiber resulted in better beating response and pulp strength properties.
Improvement of Ink Jet Printing Paper Quality with Oxidized Starch Ester and Additives
Jung, Kwang Ho ; Jeong, Young Bin ; Lee, Hak Lae ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 4, 2013, Pages 21~26
DOI : 10.7584/ktappi.2013.45.4.021
The effect of esterified starch as surface sizing agent for inkjet printing paper has been evaluated and compared with oxidized starch. Also the influence of various additives including cationic poly-DADMAC, stearic acrylic copolymer, calcium chloride, and GCC was examined. Results showed that starch ester gave higher ink density than oxidized starch. Addition of poly-DADMAC improved water fastness. In general, low molecular weight poly-DADMAC performed better than high molecular weight one, and it was attributed to the fact that it gave more uniform film forming characteristics in surface sizing. Use of styrene acrylic acid copolymer increased hydrophobicity of the paper surface, but it did not increase the ink density. Use of GCC and calcium chloride had only marginal effect on printing quality.
Effect of PFI mill and Valley beater refining on cellulose degree of polymerization, alpha cellulose contents, and crystallinity of wood and cotton fibers
Hai, Le Van ; Park, Hee Jung ; Seo, Yung Bum ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 4, 2013, Pages 27~33
DOI : 10.7584/ktappi.2013.45.4.027
Manufacturing fabrics from dissolving cellulosic pulp is increasing in these days. For making high quality of cellulose-based fabrics, control of cellulose DP (degree of polymerization), its alpha cellulose content, its brightness, and its crystallinity are important. To process the cellulosic raw material, refining of cellulosic fibers is essential, and it is important to know if refining affects those important cellulose properties. The effects of PFI mill and Valley beater refining on the alpha-cellulose content, cellulose DP, crystallinity, and paper mechanical properties of wood and two different cotton fibers were studied. The results showed that PFI mill refining rarely affected those properties. Fibers refined by a Valley beater displayed a small reduction in fiber length in comparison with those refined by a PFI mill. However, the Valley beater refining method produced almost no changes in cellulose properties, either. The refining process seemed to have very little effect on the cellulose DP, crystallinity index, or alpha-cellulose content until the freeness decreased to around 300 mL CSF for wood and 100 mL CSF for cotton fibers, respectively. There were also no differences in tensile strength development in two refining methods.
Evaluation of the physical properties of organic fillers made from agricultural byproducts
Lee, Ji-Young ; Lim, Gi-Baek ; Kim, Young-Hoon ; Lee, Se-Ran ; Kim, Man-Young ; Kim, Chul-Hwan ; Kim, Sun-Young ; Kim, Jun-Sik ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 4, 2013, Pages 34~41
DOI : 10.7584/ktappi.2013.45.4.034
In this study, we investigated the physical properties of powders made from agricultural byproducts, including rice straw, peanut husks, and garlic stems, to manufacture a new organic filler used for making paperboard. These materials were collected individually, and then we measured their chemical compositions. The byproducts were ground with a laboratory grinder and fractionated with 60-, 100-, and 200-mesh sieves to make many grades of organic fillers. After the grinding and fractionation, the yield, mean particle size, and particle size distribution of each grade were measured. Particle shapes were also investigated using a scanning electron microscope. The organic filler made from rice straw had the highest yield of the largest particle size group and higher contents of cellulose and hemicellulose than those made from peanut husks and garlic stems. The rice straw also showed more regular particle shapes and a lower aspect ratio than the other agricultural byproducts.
Environmental management strategies of Korean paper industry for response to climate change
Kim, Dong Seop ; Sung, Yong Joo ; Kim, Se-Bin ; Lee, Joon-Woo ; Park, Gwan-Soo ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 4, 2013, Pages 42~51
DOI : 10.7584/ktappi.2013.45.4.042
Climate changes have become the major issue for the sustainable society and the various regulation has been established for promoting low carbon and green growth in Korea. The paper industry as a large comsumer of energy is forced to cope with these regulation. In this study, the various examples were investigated for providing the basic schemes to develop environmental management strategies of Korean paper industry. The various cases to follow carbon economic were introduced and were categorized into five ways, for example, the carbon capture projects such as reforestation, the increasing the process efficiency, the resource recovery form process waste, the cogeneration systems, the application of non-woody biomass.
Characteristics of Starch Paste for Conservation of Paper Properties (Part 1) - The Nature and Adhesive Strength of Starch Paste -
Yang, Eun-Jung ; Cho, Kyoung-Sil ; Choi, Tae-Ho ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 4, 2013, Pages 52~64
DOI : 10.7584/ktappi.2013.45.4.052
This study was carried out to investigate the characteristics of starch paste which was used for the conservation of paper properties. Three kinds of commercial corn starch and five kinds of fermented wheat starch were examined on the contents of amylose and amylopectin, shapes of particles, and viscosity and pH of paste. And adhesive strength on the drying, accelerated aging, and wetting treatments were measured. The contents of amylopectin of oxidized corn starch were higher those of cationic corn starch, unmodified corn starch, and fermented wheat flour. In case of fermented wheat flour, increasing of a fermentation period was resulted in increasing of amylopectin contents. The particle shapes of commercial corn starch showed with a uniform polygon, but fermented wheat flour showed with a mixture of small and large oval types. The viscosity of oxidized corn starch were very lower those of cationic corn starch and unmodified corn starch. And increasing of a fermentation period of wheat flour was resulted in increasing of viscosity. The pH of commercial corn starch were 3.6-7.5 and fermented wheat flour were 3.6-5.2. Through the examination on the nature and adhesive strength of starch paste, the oxidized corn starch 60 cps which is the name of products and wheat flour which had fermented for 5 years were considered that most suitable for conservation of paper properties.
Fiber Analysis and Environmental Assessment of Recycled Waste paper for Eco-friendly Corrugated Box Manufacture
Park, Jung-Yoon ; Lee, Tai-Ju ; Kim, Hyoung-Jin ; Kim, Jin-Mu ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 45, issue 4, 2013, Pages 65~74
DOI : 10.7584/ktappi.2013.45.4.065
In the manufacture of corrugated box, the fibrous raw materials are mainly consisted of recycled papers, such as KOCC(Korean Old Corrugated Container), kraft sack, and AOCC(American Old Corrugated Container). Among these recycled waste paper, the proportion of KOCC is relatively higher than others in fibrous raw materials. Generally, KOCC shows some poor fiber properties and contains hazardous heavy metal sources. Therefore, it is to evaluate the property of recycled paper sources for eco-friendly corrugated box manufacture. In this study, the physical and mechanical properties of 3 kinds of recycled fibers and their mixed stocks were analyzed. The environmental assessment was also evaluated by analyzing the 4 representative heavy metal contents and evaporation residues in waste papers. As the results, KOCC showed the poorest fiber qualities and had the highest heavy metal contents and evaporation residues among the recycled fibers. Finally, the mechanical strength properties were increased by decreasing KOCC proportion of mixed stock conditions. In addition, the heavy metal contents and evaporation residues were also decreased by increasing recycled AOCC and kraft sack proportion.