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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 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
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Adsorption of cationic birchwood xylan on Hw-BKP and its effect on paper properties
Lee, Sang-Hoon ; Lee, Hak-Lae ; Youn, Hye-Jung ; Xiang, Zhu Hong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 1~11
The possibility of applying birchwood xylan in papermaking process to improve dry strength of paper was investigated. Unmodified xylan barely adsorbed onto pulp fibers while cationically modified xylan adsorbed substantially. Adsorption of cationically modified xylan by quaternarization with 3-chloro-2-hydroxypropy trimethylammonium chloride improved dry strength of paper. Chemical structure and degree of substitution of the cationically modified xylan was determined by 400 MHz 13CNMR spectroscopy and elemental analyzer. The amount of adsorbed xylan on cellulose fibers was greater when the cationicity was moderate, and it was interpreted that the conformation of this cationic xylan adsorbed on fiber surface was more favorable for greater adsorption due to its greater loop formation tendency while highly cationic xylan tends to adsorbed in stretched conformation. The physical properties of handsheets increased as the amount of adsorbed cationic xylan increased. On the other hands, the optical properties decreased with xylan adsorption.
Analysis of Plant Growth Effects Using Seedling Pots Made from Paper Mill Sludges
Song, Dae-Bin ; Bae, Eun-Ji ; Kim, Chul-Hwan ; Huh, Moo-Reung ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 12~19
This study was carried out to explore the availability of seedling pots made from paper mill sludge using red pepper species called Nokkwang. The seedling pots were made by several conditions such as different mixing ratios between sludge and old newspaper (ONP), sterilizing treatment and latex coating. After 30 day cultivation in a green house, the growth condition of the red peppers was evaluated by comparison with those raised in the plastics seedling pots. The red peppers in the plastics pot showed a better growth than those in the sludge pots. Sterilizing treatment, latex coating and different mixing ratios between paper sludges and ONP did rarely affect a growth rate of the plant and the contents of inorganic elements. However, latex coating contributed to protection of physical structure of the sludge pots in spite of constant water feeding. Even though some inorganic elements from the sludge pots migrated into the bed soils, electronic conductivity of the bed soils was within the proper range for the plant growth. Finally it was confirmed that the seedling pots made from paper mill sludges could be used to cultivate horticultural plants as the alternative to the plastics pots.
A Study on Growth of Aspergillus versicolor and Penicillium polonicum within the beeswax treated paper
Park, Ji-Hee ; Choi, Kyoung-Hwa ; Seo, Jin-Ho ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 20~26
Paper composed mainly of organic materials and they can be used as nutrient by microorganisms. Therefore microorganisms are damaging the important documents and works of art irreversibly. Previous research reported that mycelium or spores of the fungi were observed on the wax of the volumes of King Sejong especially were heavily deteriorated by fungi. Fungal strains isolated from the annals of Joseon dynasty were identified as Biscogniauxia atropunctata, Aspergillus versicolor, Penicillium polonicum, Ceriporia lacerata, Irpex lacteus. Especially Aspergillus and Penicillium are able to grow on the substrates having a 7-8% moisture content, which is much lower than the general storage condition (RH55-60%) of the paper cultural properties. Moreover, they are known as fungi cause paper deterioration and discoloration. In this study, we selected Aspergillus versicolor and Penicillium polonicum among five strains, then biological aging has been executed for 30 days. The growth of Aspergillus versicolor and Penicillium polonicum in wax was lower than wax treated paper and Hanji. The growth of them in beeswax treated paper and Hanji both were excellent.
Microscopic Observation of Moso bamboo(Phyllostachys pubescens Mazel) with Various Ages
Yoon, Seung-Lak ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 27~34
To obtain the basic information for the use of bamboo, the anatomical characteristics of moso bamboo shoots, and 20-day-old, 60-day-old, one-year-old, and two-year-old moso bamboo were observed by using polarizing microscope. The cross section showed that the bamboo shoots consists of the early stage of cell formation, atactostele, parenchyma, and bundle sheath was formed in 20-day-old moso bamboo, and all cells completely formed in 60-day-old moso bamboo. The tissues in one-year-old moso bamboo appeared to be completely matured. On the tangential surface, no atactostele was observed in the bamboo shoot, but metaxylem, parenchyma, and bundle sheath were found. atactostele and parenchyma appeared to be formed between 20 and 60 days. All tissues and cells were totally formed and the cell wall of parenchyma were completely matured after one year. The metaxylem in bamboo shoots was observed to have pits, which means that it could be the tissues first formed of all bamboo cells.
Impact of hexeneuronic acid to kappa number determination in hardwood chemical pulps
Shin, Soo-Jeong ; Sung, Yong-Joo ; Park, Jong-Moon ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 35~40
Variations in hexeneuronic acid content in hardwood alkaline pulps were investigated to evaluate their contribution to kappa number. Out of diverse chemical pulps the highest hexeneuronic acid content were measured in yellow poplar kraft pulping, which was assumed to enhance ca. 7.0 of kappa number determined by acid permanganate consumption. In yellow poplar soda-anthraquinone pulping, hexeneuornic acid was contributed to increment of 5.0-6.0 kappa number. In eucalyptus alkaline pulping, hexeneuronic acid content was not significantly different from soda-anthraquinone pulping. Increment of Kappa number by hexeneuronic acid was 4.5-5.6 depending on pulping method and pulping time at target temperature.
Handsheet Property Changes by Internal Addition of Surface Strength Agent
Lim, Jong-Hyck ; Jung, Chul-Hun ; Chae, Hee-Jae ; Park, Chang-Soon ; Park, Jong-Moon ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 41~45
This study was performed to evaluate the effect of paper property changes by internal addition of surface strength agent on printability. Advances in printing technique has required the development of paper qualities in many aspects. Basically paper structure is composed of hydrogen bonds which induce many problems in high speed printing machine because of weak bonding strength. One of the important printing problems is surface picking when mechanical pulp or recycled pulp are used. It was caused by the ink-stained blanket in printing process because accumulations of pollutant in white water and other elements which are bonded weakly or do not have hydrogen bonds. Debris at paper surface adheres to blanket which deteriorates printing efficiency and causes various problems. To complement these problems, Pennocel 5137 of polysaccharide structure was used as an agent to improve paper's surface property, strength and printability. Paper surface picking was analyzed by RI-1 test. As the dosage amount increased tensile strength, fiber bonding strength and ZDT strength were improved. Further more formation, smoothness and surface picking resistance were improved. It was confirmed that when adding polysaccharide structure polymers to improve surface strength such as surface picking resistance, it was also possible to improve tensile strength, fiber bonding strength, formation and smoothness.
Ageing Behavior of Beeswax Coated Hanji(I) - Thermal Ageing Test of Beeswax Coated Hanji -
Kim, Kang-Jae ; Eom, Tae-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 46~52
The annals of Joseon Dynasty has been known as one of the UNESCO's Memory of the World Heritage. The annals of Joseon Dynasty composed with two kind of books, wax coated book and non coated book. Especially the waxed book have been severely damaged by various reason. For the safety preservation of the annals of Joseon Dynasty waxed book, the thermal ageing mechanism of beeswax coated Hanji paper has been evaluated. The weight loss of waxed Hanji were rapidly increased until 30 days in three temperatures(105, 120 &
) and stabilized after 30 days. The acid value and relative intensity of carbonyl groups in beeswax were increased with strong conditions. This means that the deterioration of beeswax should be progressed with oxidizing reaction. The physical strength and the crystallinity of dewaxed Hanji were decreased with ageing time.
Study on the Properties of Kudzu Fibers as a Papermaking Material
Kim, Chul-Hwan ; Lee, Ji-Young ; Gwak, Hye-Jeong ; Lee, Hui-Jin ; Back, Kyung-Kil ; Seo, Jung-Min ; Park, Hyun-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 53~60
Kudzu vine (Pueraria lobata) is a perennial plant and spreads all around in South Korea. Recently the use of leaves, stems and roots of kudzu vine has been investigated in many fields. However, the research on kudzu fibers has not been performed in korean pulp and paper industry. As the stems and roots of kudzu were estimated to contain cellulosic fibers, the possibility of producing a raw material from kudzu fibers in pulp and paper mills was investigated in this study. The stems and roots of kudzu were collected in woods, and then the chemical composition and ash contents was measured. To acquire kudzu pulp, kraft pulping and bleaching of kudzu roots were carried out sequently. After making kudzu pulp, freeness and fiber length were measured, and handsheets was also prepared with kudzu pulp and the properties of handsheets were determined. Consequently, kudzu fibers have lower holocellulose contents than wood fibers and other non-wood fibers. Average fiber length is shorter than that of Sw-BKP, but shows the same level as that of Hw-BKP. The handsheet made from kudzu pulp shows the bulkier structure than those made from Hw-BKP and Sw-BKP.
Evaluation of morphological properties and papermaking properties of corn biomass
Sung, Yong-Joo ; Kim, Wan-Jung ; Kim, Dong-Seop ; Seo, Yung-Bum ; Shin, Soo-Jeong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 61~66
Corn stalk, one of the most abundant agricultural residue in the world, was examined in this study to use it as an alternative fiber source of wood fiber. In order to find the proper way to utilize corn stalk more efficiently, the morphological properties and the papermaking properties of the, bast fibers and the corn pith, were evaluated respectively. Although the bast fiber fraction showed comparable properties to those for hardwoods in the fiber properties and the papermaking properties, the pith resulted in low brightness and low drainage rate. But the short and flexible fibers in pith fraction led to dense and compact handsheet structure, correspondingly the higher sheet strength. There big differences in properties between bast fiber and pith should be considered for the fully utilization of corn stalk.
Characteristics of Lotus (Nelumbo nucifera G.) Leafstalk Pulp for the Development of High Performance Paper
Choi, Tae-Ho ; Seo, Ji-Cheol ; Lee, Ji-Nyeon ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 67~74
This study was carried out to investigate the pulping and papermaking characteristics of lotus (Nelumbo nucifera G.) leafstalk for the development of high performance paper. Anatomical and chemical properties of the lotus leafstalk were analyzed. The pulping and papermaking properties of the lotus leafstalk by conventional alkali and sulfomethylated pulping processes were also evaluated. The length and width of fibers were 0.06-3.32 mm (av. 1.23 mm) and 3.47-25.6
), respectively. The length and width of vessel elements were 0.07-0.78 mm (av. 0.20 mm) and 14.1-330.0
), respectively. The fiber length/fiber width ratio was 60.20. The extractives (cold water, hot water, 1% NaOH and ethanol-benzene) and lignin content of lotus leafstalk were higher than those of plant bast fiber. The contents of holocellulose, lignin, and ash were 73.8%, 24.3%, and 4.3%, respectively. The pulp yields based on pulping methods were sulfomethylated pulping av. 52%, and alkaline pulping av. 42%. The conventional alkaline pulping shows better pulp and sheet properties than the sulfomethylated pulping which was modified pulping processes. But the sulfomethylated pulping shows higher brightness than alkali pulping. In the consequence of FE-SEM observation, lotus leafstalk pulp consists of various kinds of thin walled fibers which have large amount of small pits.
Properties of Biodegradable Polymer and Afforestation Seedling Mulching Mat
Kim, Kang-Jae ; Kim, Hyoung-Jin ; Eom, Tae-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 75~81
Characteristics of mixing biodegradable polymers and polymer impregnated paper for mulching mat for seedling were investigated. The mixed film of 70% PLA was most easily biodegradable. The surface of polymer films were changed to more rough due to enzymatic degradation of lipase. Tensile strength and breaking elongation of PLA mixed films were increased to the 0.04-0.31 kN/m and the 0.17-0.96%, respectively. With higher PLA contents, intensities of ester originated carboxyl group(about
) were increased. Physical properties of prepared mulching mats were increased with PLA contents and stiffness of mulching mat was not so much changed.
Properties of Hanji Dyed with the Persimmon Juice
Yoo, Seung-Il ; Lee, Sang-Hyun ; Gwak, Mi-Rye ; Choi, Tae-Ho ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 82~87
The Hanji dyed with persimmon juice were useful goods in the past, but they are not widely used nowadays despite of their many strong points such as antibacterial and water-resistant properties. The object of this study is to provide useful data for developing new products by using them. We dyed traditional Korean hand-made papers (Hanji) with colorants extracted from fruits of Diospyros kaki and investigated the effect of various dyeing factors (mordant, mordanting method, pH of dyeing solution, light exposure time etc.) on optical and mechanical properties of the dyed Hanji. Changing mordant affected the color of dyed Hanji. The dyed Hanji after-mordanted with Cu mordant had the highest K/S value and showed the deepest yellow and red shade. The best mordanting method was an after-mordanting. The K/S value of dyed Hanji increased with decreasing pH of dyeing solution. The tensile index and size degree values of the Hanji were increased after dyeing.
Sugar Extraction by Pretreatment and Soda Pulping From Cattail (Typha latifolia L.) (1) Extraction of Sugar
Lee, Sung-Eun ; Kim, Wan-Jung ; Son, Mi-Kyung ; Seo, Yung-Bum ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 88~94
Cattail (Typha L.) was used as a raw material for producing both bio-ethanol and pulp for papermaking at the same time. Pretreatments of cattail stems and leaves with acid (
) and alkali (NaOH) in three different addition levels were studied before soda pulping. The acid pretreatment gave reducing sugar of 15.2% of initial weight, but alkali pretreatment close to 1%. Soda pulping of the pretreated cattail gave 3% reduction in pulp yield and less bonding properties in paper; however, refining of the pulp from the pretreated cattail with alkali restored their fiber bondings up to that of the pulp from no-pretreated cattail at equivalent freeness.
Development of Synthetic Sizing Agent Using Recycling Polyethylene Terephthalate and its Sizing Efficiency (Part 2) - Sizing efficiency of modified PET -
Park, Jae-Seok ; Kim, Hyoung-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 2, 2010, Pages 95~101
For the development of higher-sizing performance of paper, a sizing agent using recycled PET was synthesised. Polyester resin was extracted from wasted PET by subcritical hydrolysis and finally modified to synthetic sizing agent by mixing water-disperse PET with triphenyl phosphite(TPP). The modified PET was considered as an internal sizing agent in different wet-end papermaking conditions. The optimum condition in sizing efficiency was obtained in initial pH of 6.5 in case of rosin+alum system, and 7.5 in case of rosin+alum+PET system, respectively, and in addition amount of PET 3%. The sizing efficiency was also closely related according to the fiber properties of wet-end slurry, such as virgin fibres from UKP and recycled fibres from KOCC. The application of modified PET was good in strength improvement of paper, specially in tensile strength.