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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
Evaluation of Characteristics of Sasa quelpaertensis Nakai Stem for the Comprehensive Utilization
Sung, Yong Joo ; Kim, Dong Sung ; Lee, Ji-Young ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 5, 2012, Pages 1~7
DOI : 10.7584/ktappi.2012.44.5.001
Chemical composition, morphological properties and papermaking properties of Sasa quelpaertensis Nakai were investigated in order to use it comprehensively. The lignin contents of stalks and leaves were 18.8% and 15.3% and the holocellulose contents were 63.3% and 48.6% respectively. The contents of ash and the amount of water extract showed the higher value than those of wood or other bamboo species. The average fibers length and width of Sasa quelpaertensis Nakai were 780
. The fibers of Sasa quelpaertensis Nakai stalk had thinner width and more slender structure than those of softwood. The handsheet made of Sasa quelpaertensis Nakai alkaline pulp showed higher in tensile strength and bulkier structure than those of handsheet made of soft wood unbleached kraft pulp.
Adsorption of Flexography Ink on Inorganic Particles Patched with Cationic Polymer
Jeong, Young Bin ; Kim, Jin Woo ; Oh, Kyu Duk ; Youn, Hye Jung ; Lee, Hak Lae ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 5, 2012, Pages 8~13
DOI : 10.7584/ktappi.2012.44.5.008
The flexography ink has disadvantage in a deinking process because it tends to form too fine particles in alkali condition to be removed in flotation deinking. The influence of pH conditions on the particle size of phthalocyanine cyan ink used for flexo-printing was investigated to see the effect of pH conditions on flexography ink dispersion. Flexography ink particles prepared by grinding dried ink films were used in this experiment. Greater reduction of the ink particle size was noticed under alkaline pH condition, which was attributed to dissolution of resin component of the ink. Adsorption behavior of flexography ink onto pigment particles was examined using clay and talc as substrate pigments. Pretreatment of inorganic pigments with a cationic poly-DADMAC increased the surface adsorption of flexography ink particles, which improved the removal of the inks by centrifugal sedimentation of inorganic pigments. Most efficient removal of the ink particles was achieved when an optimal addition level of the cationic polymer was used for pretreatment of inorganic pigments, and this optimal addition level corresponds to the surface saturation point of the polyelectrolyte. Adsorption of flexography ink particles onto inorganic pigments improved the ink removal in flotation deinking since the pigment particles has the optimal particle size for flotation deinking.
Manufacture of Environmentally-friendly Flame-retardant Paper with Polyethylene Terephthalate (PET) Short Cut Fiber
Kim, Ji-Seop ; Lee, Myoung-Ku ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 5, 2012, Pages 14~20
DOI : 10.7584/ktappi.2012.44.5.014
In this paper, the flame-retardant wall paper was successfully prepared with recycled polyethylene terephthalate (PET) short cut fiber with flame-retardant property and wood pulp using polyvinyl alcohol (PVA) as binder followed by treatment of non-halogen flame retardant. Physical properties such as formation index, tensile strength, elongation, and burst strength increased as defibrillation increased except tear strength. Bulk increased but formation index, tensile strength, elongation and burst strength decreased along with addition of PET short cut fiber. It was also found that tear strength rose significantly up to 30% of PET short cut fiber and then declined (fell) rapidly. As addition level of PVA increased tensile strength, elongation and burst strength increased, but tear strength decreased slightly. Addition of 20% of PET short cut fiber and 13% of PVA provided the flame-retardant wall paper with both improved flameproofing and physical properties.
Modification of GCC with Poly-DADMAC and PSS with Different Molecular Weights and its Effect on the Paper Properties
Ahn, Jungeon ; Lee, Jegon ; Lee, Hye Yoon ; Youn, Hye Jung ; Lee, Hak Lae ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 5, 2012, Pages 21~31
DOI : 10.7584/ktappi.2012.44.5.021
In this study, we modified the surface of ground calcium carbonate (GCC) with polyelectrolytes with different molecular weight using Layer-by-Layer (LbL) multilayering technique and investigated its effect on the paper properties. Polydiallydimethylammonium chloride (poly-DADMAC) and poly sodium 4-styrene sulfonate (PSS) which have different molecular weights were used for LbL multilayering. Zeta potential and particle size of the LbL modified GCC were measured. After preparation of handsheets, their structural and mechanical properties were evaluated. The zeta potential and average particle size of the modified GCC were affected by the molecular weight of anionic polyelectrolyte (PSS). The zeta potential was higher and the particle size was smaller when GCC was treated by PSS with high molecular weight compared to the case with low molecular weight of PSS. The tensile and internal bond strength of the handsheets was increased with an increase in the number of layers on GCC particles, but the molecular weight of polyelectrolyte did not significantly affect the paper strength.
Manufacture of Multi-Layer Coated Paper with Eco-Friendly Starch Based Bio-Binder(1) - Application Possibility of Bio-Binder -
An, Guk Heon ; Choi, Ki Soon ; Won, Jong Myoung ; Lee, Yong Kyu ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 5, 2012, Pages 32~38
DOI : 10.7584/ktappi.2012.44.5.032
This study was carried out to elucidate the potential in substitution of SB latex with eco-friendly starch based bio-binder as a coating binder. The part of SB latex in coating color of pre- and top layer was substituted with starch based bio-binder in order to evaluate the characteristics of coating color and coated paper, and printability. The viscosity and water retention of coating color were increased by substitution of SB latex with starch based bio-binder. Roughness of coated paper was increased by substitution with starch based bio-binder, although there was not significant changes in roughness when SB latex is used as a binder in pre-coating color. Brightness and whiteness of coated paper were not affected, but opacity and print mottle were improved by substitution with starch based bio-binder. The interesting result observed was that dry-pick did not affected significantly, and ink set-off was improved by starch based bio-binder. It is expected that starch based bio-binder can be commercialized if the systematic further research works are carried out.
Studies on Rheological Properties of High Solids Coating Colors (I) - Effect of Rheology Modifiers on Viscoelastic Properties -
Yoo, Sung-Jong ; Cho, Byoung-Uk ; Lee, Yong-Kyu ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 5, 2012, Pages 39~45
DOI : 10.7584/ktappi.2012.44.5.039
For a fundamental study for high concentration pigment coating, the effects of alkali swellable emulsion (ASE) type rheology modifier and surface adsorption emulsion (SAE) type rheology modifier on both the stability and the viscoelastic behavior of a coating color were elucidated. The coating color prepared with SAE type rheology modifier showed superior thermal and mechanical stability than that with ASE type. In the high concentration and high speed coating process, the mechanical stability of a coating color was a key parameter since both impact force and shear force were increased with the increase of coating color concentration and coating speed, respectively.
Manufacture of Colores Hanji for Interior Materials from Natural Pigments(Part 2) - Study on Functional Properties of Super Eight Colors Changhoji -
Lee, Sang-Hyun ; Shin, Yoo-Su ; Choi, Tae-Ho ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 5, 2012, Pages 46~53
DOI : 10.7584/ktappi.2012.44.5.046
The purpose of this study was to investigate the functional properties of Changhoji with natural dyeing. This research would provide a basic information for interior material Changhoji. To estimate functional properties of super eight colors Changhoji, water staining, lightfastness, and floodlight color test were executed. In term of the water staining test, blue color showed the clear and other colors showed the little spot. As a result of measuring the lightfastness, Magenta color dyed with sappanwood showed the worst. But blue color dyed with indigo and Turquoise color dyed with indigo and Pagoda tree flower showed the highest. As a result of floodlight color test was no difference between sample color and floodlight color.
Influence of the Viscosity of Surface Sizing Starch Solutions on Surface Sizing Effect of Linerboard
Jeong, Young Bin ; Lee, Hak Lae ; Youn, Hye Jung ; Jeong, Kwang Ho ; Ryu, Hoon ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 5, 2012, Pages 54~62
DOI : 10.7584/ktappi.2012.44.5.054
The main role of surface sizing of linerboard is to improve surface and strength properties. Since surface sizing solution is applied on once dried web, substantial amount of drying energy is required. Saving of the drying energy associated with surface sizing can be made by increasing the solids content of the starch solution in size press. Therefore, it is highly desirable to develop low viscosity starches for surface sizing. A low viscosity oxidized starch was prepared and compared its effect of surface sizing with a conventional oxidised starch. Results showed increase in solids content of the starch solution decreased evaporation energy and drying time. Low viscosity starch penetrated deeper into paper and this improve various mechanical properties of linerboard.
Optimum Use of Forest Biomass Generated from the National Forest Management Operation (Part 1) - Study of Characteristics of Kraft Pulps Made from Single Wood Species -
Park, Hyun-Jin ; Kim, Chul-Hwan ; Lee, Jee-Young ; Lee, Gyeong-Sun ; Lee, Ji-Young ; Sheikh, M.I. ; Sim, Sung-Woong ; Yim, Su-Jin ; Lee, Young-Min ; Ahn, Byung-Il ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 5, 2012, Pages 63~71
DOI : 10.7584/ktappi.2012.45.5.063
This study was carried out to investigate pulping properties of the forest biomass arising from the national forest management operation. The forest biomass was collected and classified into many groups according to their species and age. After the chips were made from the forest biomass, the measurement of chip size and chemical analysis were performed. To make the pulps from the forest biomass, the kraft pulping was applied and thereafter the physical and optical properties of kraft pulps were measured. The pulp fibers from the forest biomass had the similar mean fiber length, but their properties became different according to wood species and ages. Differently from the other species, kraft pulps from chestnut wood had the highest kappa number. Acacia, paulownia and chestnut woods made kraft pulps with lower tensile strength and brightness than the others. It could be concluded that acacia, paulownia and chestnut woods must be screened out in order to make a good quality of kraft pulps while being collected during Forest Management Operation.
Studies on the Aging Characteristics in Different Parts of Beeswax-treated Duplicates during Humidified Artificial Aging
Choi, Kyoung-Hwa ; Cho, Jung Hye ; Kang, Yeong Seok ; Yang, Eun Jung ; Jeong, Hye Young ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 5, 2012, Pages 72~79
DOI : 10.7584/ktappi.2012.44.5.072
In this study, to understand the aging factor and mechanism in different partitions of the beeswax-treated volumes, the duplicated beeswax-treated volume was artificially aged at
of temperature and 65% of relative humidity and then a physical and optical properties of an aged volumes was analyzed. Also, the degraded components of the beeswax samples isolated from different partitions of aged volumes was measured using a gas chromatography/mass spectroscopy (GC/MS). In results, the surface of beeswax-treated volume which is primarily affected by a main aging factors such as light, oxygen, moisture was more deteriorated than the inside of that volume. However, unlike inside of the book volume which was made from paper, the inside of beeswax-treated volume wax was also considerably deteriorated. The inside of the beeswax-treated volume is largely unaffected by the oxygen and humidity during aging due to the water repellency and the air permeation resistance of beeswax. Therefore, it is confirmed that aging factors and mechanisms in the inside of the volume are different from thats of the outside of the volume. This fact was also verified by the results of GC/MS analysis of an beeswax samples which was sampled from different partitions of aged volumes. As result as GC/MS analysis of the beeswax extracted from the outside of the aged volume, the low molecular compounds with a carbon length of
(fatty acid, etc) were increased and the compounds with a carbon length of above
(ester, etc) were also increased. But the compounds with a chain length of
(hydrocarbon, alcohol, etc) were decreased. In case of the aged beeswax of inside, the low molecular compounds with a carbon length of
(fatty acid, etc) and the compounds with a chain length of
(hydrocarbon, alcohol, etc) were increased. While, the compounds with a carbon length of above
(ester, etc) were decreased.
Evaluation of Applicability of Bottom Ash as Inorganic Filler
Oh, Min-Taek ; Sung, Yong Joo ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 44, issue 5, 2012, Pages 80~86
DOI : 10.7584/ktappi.2012.44.5.080
The disposal of the bottom ash originated from a thermoelectric power plant which used the pulverized coal, has been an important issue of the power plants. In order to find the possible way of recycling of the bottom ash, the applicability of the bottom ash as an inorganic filler for paper making was investigated in this study. The pretreatment with acid were applied for upgrading the properties of bottom ash. The effects of the addition of the bottom ash to the different pulp stocks, Sw-BKP, DIP(Deinked Pulp), Sw-UBKP were evaluated in terms of the change in paper properties. The brightness and tensile strength decreased as the increase of the amount of the bottom ash addition. The bulk and the opacity were increased by the addition of bottom ash. The pretreatment of bottom ash resulted in the increase of improvement of the brightness and the strength properties comparing with those of untreated bottom ash.