• Title, Summary, Keyword: Filler

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Development of New Organic Filler for Improving Paperboard Strengths (판지의 강도 향상을 위한 신규 유기충전제 개발)

  • Lee, Ji Young;Kim, Chul Hwan;Park, Jong Hye;Kim, Eun Hea;Yun, Kyeong Tae
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.47 no.5
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    • pp.74-79
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    • 2015
  • Wood powder is widely used in paperboard mills to increase bulk and reduce drying-energy consumption, but this material also deteriorates paper strength because it interferes with the bonds between fibers. Although there have been many studies done to improve the strength of paperboard containing wood powder, specific applications have not recently been observed in paperboard mills. In this study, we carried out a new approach for improving paperboard strength by developing a new organic filler with the ability to increase the bonds between fibers. The residue of tapioca starch was used as raw material to manufacture an organic filler. The functionalities, including bulk and strength, were evaluated by making handsheets containing either wood powder or tapioca organic filler, or a mixture of the two, and measuring their physical properties. The organic filler showed lower bulk improvement and higher paperboard strength than the wood powder. The mixture of tapioca organic filler and wood powder showed improved paperboard strength compared to wood powder alone. Therefore, tapioca residue can be used as a raw material to manufacture an organic filler for paperboard mills.

Paper Strength Improvement by Anionic PAM and Cationic Starch Adsorbed PCC (음이온성 PAM과 양이온성 전분으로 도포된 경질탄산칼슘에 의한 종이 강도 향상)

  • Choi, Do-Chim;Choi, Eun-Yeon;Won, Jong Myoung;Cho, Byoung-Uk
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.45 no.1
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    • pp.59-66
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    • 2013
  • Fillers have been used for printing paper to improve printability, sheet formation and optical properties and to reduce production costs by replacing expensive wood pulps. However, an increased filler content will decrease paper strength because filler particles interfere with fiber-fiber bonding. In order to increase filler content without sacrificing too much paper strength in high filler content papers, the surface of precipitated calcium carbonate (PCC) has been modified by adsorbing anionic polyacrylamide and cationic starch in series. The adsorbed polymer layers would enhance interactions between the filler surface and the fiber surface, improving internal bonding. It was found that the modified PCC increased paper strength at a given filler content compared to the coventional method. Negligible differences in optical properties and formation of paper, filler and fines retention and drainage on the wire section were observed between the modified and the conventional PCC. However, the decreased bulk of paper was observed when the modified PCC was used.

Fabrication and Characteristics of Shielding Effects for the Complex Conductive Filler (복합 전도성 필러의 제작과 전자파 차폐 특성)

  • Park, Ju-Tae;Park, Jae-Sung;Do, Young-Soo
    • 전자공학회논문지 IE
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    • v.43 no.4
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    • pp.122-127
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    • 2006
  • A series of conductive filler were prepared with electroless plating method. Base conductive materials of the filler were nickel and copper. The cores were prepared with Nylon 6 and rayon in different aspect ratio. Also, various complexes were made with ABS resin and conductive filler with different filler feed ratio. The conductivity of the filler was measured with conductivity analyzer and the size distributions of fillers was measured with laser particle size analyzer. Electromagnetic wave shielding efficiency of each complex film was measured with flange circular coaxial transmission line sample holder within the 1MHz$\sim$1GHz bandwidth range. From this study, the conductivity of filers surpass that of other carbon films. It is available that the filler made of fibrous materials can be applied in plastic molding industry of electric appliances as a EMI filler.

Effect of Al2O3 Filler Addition on Sintering Behavior and Physical Characteristics of BaO-B2O3-ZnO Glass Ceramic System (BaO-B2O3-ZnO 결정화 유리계에서 Al2O3 Filler의 첨가에 따른 소결거동 및 물성변화)

  • Kim, Byung-Sook;Kim, Young-Nam;Lim, Eun-Sub;Lee, Joon-Hyung;Kim, Jeong-Joo
    • Journal of the Korean Ceramic Society
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    • v.42 no.2
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    • pp.110-116
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    • 2005
  • Suitable compositions which are sinterable at low temperature in the $BaO-B_{2}O_{3}-ZnO$ glass system were investigated as a function of the ratio between BaO and ZnO. The effect of $Al_{2}O_3$ filler on densification and physical characteristics of the glass was also examined. When the amount of $Al_{2}O_3$ filler increased, the densification rate and the values of dielectric constant, thermal expansion coefficient and hardness in the glass-filler composites decreased gradually. The decreasing rate of the physical properties accelerated when fine $Al_{2}O_3$ filler was used. However, the fracture toughness of the composite rather increased due to the existence of filler particles and pores which effectively suppressed crack propagation with addition of fine $Al_{2}O_3$ filler.

Infrared Studies of the Rubber-Filler System (가황(加黃)고무에 함유(含有)된 충전제(充塡劑)에 대(對)한 적외선분광분석(赤外線分光分析) 연구(硏究))

  • Su, Won-Dong;Paik, Nam-Chul
    • Elastomers and Composites
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    • v.13 no.2
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    • pp.99-107
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    • 1978
  • The measurement of the infrared absorption spectrum of supporting reinforcing filler which is oltained from the domestic area of Korea, Japan and U.S.A., is used by the method of KBr pellet. As a result of experiment, each absorption fond of the filler had appeared differently, because of each filler is consisted of different chemical composition, different crystalline form, different method of preparation, and the different ways of use etc. According to the above phenomena, each filler seems to have a different characteristic infrared absorption band, We can find what filler is used for sample rubber.

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Thermal Stress Analysis of STS VOD Ladle according to the reinforcement of back filler (Back Filler의 보강에 따른 STS VOD 래들의 열응력 해석)

  • Lee, S.W.;Ham, K.C.;Bae, S.I.;Song, J.I.
    • Proceedings of the KSME Conference
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    • pp.310-315
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    • 2000
  • We analyzed thermal stress of the STS VOD ladle by the variation of material property of refractory, and determined the location of back filler using FE analysis. Thermal distribution of refractory of ladle between hot face and back face were decreased by the increasing the thermal conductivity, and thermal stress of refractory were decreased about 2 to 4 times with the decreasing the young's modulus coefficients. Back filler, which is constructed to absorb the thermal expansion of dolomite refractory, has relatively low thermal conductivity. Inner side of refractory of ladle maintained high temperature, but temperature of outer side of ladle decreased low. Consequently, inner expansion and outer contraction were appeared. and thermal stress were increased, so thermal stress by the construction of back filler were increased.

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A Study on the Manufacturing and Physical Properties of Conducting Rubber(I) - Magnetite System Conducting Rubber - (도전성(導電性)고무의 제조(製造) 및 물성(物性)에 관(關)한 연구(硏究)(I) -Magnetite 혼합계(混合系) 도전성(導電性)고무-)

  • Lee, Young-Man;Yun, Ju-Ho;Choi, Sei-Young
    • Elastomers and Composites
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    • v.30 no.1
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    • pp.9-19
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    • 1995
  • To make filler loaded conducting rubber which has the excellent electronical and physical properties, CR and NBR were mixed with magnetite$(Fe_3O_4)$. From the result of the study, vulcanization characteristics shows the upgrading curve as increase in filler concentration and CR has more torque than NBR. When elongation be higher, modulus comes to decreases. Tear strength gradually decrease after showing of the maximum point when is in the 100phr in all. Resilience is not good to cause the increase in filler concentration. In the electrical properties, conductivity becomes smaller when filler concentration is increased. The increase of voltage makes an conductivity grown, but the changed rate is weak. The influence of temperature hardly changes on increasing temperature. The morphology and the distribution for a conductivity filler through SEM were better, the more filler concentration increase, the shorter the particle interval is.

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A Study on the Manufacturing and Physical Properties of Conducting Rubber (II) -Barium ferrite System Conducting Rubber- (전도성(導電性)고무의 제조(製造) 및 물성(物性)에 관한(關)한 연구(硏究) (II) -Barium Ferrite 혼합계(混合系) 도전성(導電性)고무-)

  • Lee, Young-Man;Yun, Ju-Ho;Choi, Sei-Young
    • Elastomers and Composites
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    • v.30 no.3
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    • pp.218-228
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    • 1995
  • To make filler loaded conducting rubber which has excellent electronical and physical properties, CR and NBR were mixed with barium ferrite(BaO.6Fe2O3). From the result of this study, vulcanization characteristics shows that curve is upgraded as the filler concentration increases and CR has higher torque than NBR. In physical properties, elongation being higher, modulus comes to decrease. Tear strength gradually decrease after showing the maximum point when is in the 100phr in CR. Resilience is not good to cause the increase in filler concentration. In electrical properties, conductivity becomes low when filler concentration increase. The increase of voltage makes a conductivity grown, but the rate change is weak. The influence of temperature hardly changes on increasing temperature. The morphology and the dispersion of a conductivity filler in vulcanizates through SEM were good. The more filler concentration increases, the shorter the particle interval is.

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The influence of filler for silicone rubber tracking (실리콘 고무의 트래킹에 미치는 충전재의 영향)

  • 허창수;장기순;조한구
    • Electrical & Electronic Materials
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    • v.9 no.4
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    • pp.344-350
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    • 1996
  • Tracking is one of the biggist problems to be overcome in polymeric materials for outdoor insulators. But It can be decreased with the addition of filler such as alumina trihydrate (ATH). In this paper, the tracking of surface and evaluation of insulating ability at silicone rubber is investigated, using the salt fog test. At initial state, the peak leakage current and numbers by dry band arcing is increasing with increasing the filler level, but at aged state decreasing at high concentration filler samples. This is because the roughness of the surface may contribute to the increase in peak leakage cur-rent and numbers. As increasing the filler level, the insulating ability of materials is higher and weight loss is decreased. The mechanism of insulating failure is occurred by the erosion than the tracking and the erosion caused weight loss of 2 g.

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Examination of Newsprint Residue as a Plywood Adhesive Filler (합판의 충전제로서 신문용지 잔사의 조사)

  • Oh, Yong-Sung
    • Journal of the Korean Wood Science and Technology
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    • v.24 no.2
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    • pp.42-45
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    • 1996
  • A residue from the newsprint waste was investigated as a filler in adhesive for bonding southern pine plywood. The residue was prepared by drying the wet residue to 8% moisture content and grinding the dry material using a laboratory Wiley mitt with a 75-${\mu}m$(200-mesh) screen. The residue was compared to a commercial filler commonly used in structural plywood adhesives. A total of 48 three-ply panels. 12.7mm nominal thickness and 0.3 by 0.3 m in size, were fabricated at two press times(4 and 5 min) and three assembly times(20, 40 and 60 min). Evaluations of the residue were carried out by performance tension shear tests after two 4-hour boil accelerated aging tests on plywood. The test results included tension shear strength and estimated wood failure values. All plywood made with the residue filler were comparable to the control-bonded plywood. These results indicate that residue from the newsprint waste streams would be suitable as filler for plywood adhesives.

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