• Title/Summary/Keyword: Filler

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Effect of Filler Addition on Properties of Sheets Prepared from Bacterial Cellulose (박테리아 셀룰로오스 시트의 물성에 미치는 충전제의 첨가효과)

  • 조남석;민두식
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.30 no.4
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    • pp.35-41
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    • 1998
  • The bacterial cellulose has many unique properties that are potentially and commercially beneficial. In order to make opaque product from this cellulose, filling properties by fillers should be known. This study was performed to investigate the effect of filler addition on physical properties of sheets from bacterial cellulose. The effect of filling on its optical properties was also discussed. The apparent density and internal bonding strength of bacterial cellulose sheet are decreasing with the increase of filler contents. Those adversely affect Young's modulus and physical property of the sheet, but these negative phenomena of the bacterial cellulose sheet by filler addition are not so sensitive compared to substantial decreasing of physical properties of ordinary hardwood KP. This strength decrease would be attributed to the decrease of relative bonding sites among pulp fibers. Concerned to optical properties, the bacterial cellulose sheet shows high increase of brightness and opacity according to filler loading, but no significant changes in porosity up to 17.3% loading because of fine and filamentous structure of bacterial cellulose fibers.

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Development of eco-environmental Aluminium Fuel Filler Neck using Laser welding (레이저용접을 이용한 친환경 알루미늄 Fuel Filler Neck 개발)

  • Lee, Byung-Jin;Jeong, Sang-Yeong;Hwang, Hyun-Tae;Jeong, Hak-Soon;Choi, Hung-Won
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.20 no.4
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    • pp.484-489
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    • 2011
  • Nowadays, the automobile manufactures make a great efforts to reduce manufacturing cost, body weight and to develop eco-environmental parts in order to be more competitive and solve global warming. For these reasons, materials of automobile's parts are changed over from general carbon steel and stainless steel to plastic and Aluminum. And, laser welding technology is introduced to apply welding between aluminum parts. In this paper, the data of laser welding parameters is collected through lots of the experiment according to the material, welding speed and laser power to apply laser welding in Aluminum fuel filler neck assembly. After manufacturing prototype of aluminum fuel filler neck, vibration durability test, tensile strength test and salt water test are applied to verify product's satisfied function.

EMI Shielding Efficiency of Recycled plastic/Hybrid Conductive filer Composites filled Electro Arc furnace Slag (제강Slag 충진 폐플라스틱/복합 전도성 filler복합재료의 전자파 차폐 효과)

  • Kang Young-Goo;Song Jong-Hyeok
    • Journal of the Korean Society of Safety
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    • v.19 no.4 s.68
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    • pp.80-85
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    • 2004
  • Electromagnetic interference(EMI) shielding characteristics of composite filled with Cu flake and carbon brush powder as hybrid conductive filler and EAF slag have been studied. The coaxial transmission line method of ASTM D4935-99 was used to measure the EMI Shielding effectiveness of composites as formulation in frequency rage $100\~1,000MHz$ The SE also increases with the increase in flier loading. The hybrid filler filled composites show higher SE compared to that of only Cu flake. The correlation between SE and conductivity of the various composites is also discussed. The results indicate that the composites having higher filler loading$({\geq}40wt.\%)$ can be used for the purpose of safety materials to protect hazardous electromagnetic interference.

Viscosity of polymer melts reduced jointly by filler addition and LCP fibrillation

  • He, Jiasong
    • Proceedings of the Polymer Society of Korea Conference
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    • 2006.10a
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    • pp.132-132
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    • 2006
  • Filler loading (fiber or particulate) usually increases the melt viscosity of polymers. In contrast, the addition of these fillers and fibrillation of thermotropic liquid crystalline polymer (LCP) jointly decreased the viscosity of polymer melts to lower than those of pure component polymers, filler-loaded or LCP-blended ones; and even decreased the viscosity with increasing filler loading. Termed as rheological hybrid effect, this phenomenon correlated well with the LCP fibrillation in these ternary systems. Research taking fillers of various shapes and sizes showed that the filler addition promoted the LCP fibrillation, depending upon thermodynamic and dynamic factors involved.

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Effect of filler loading on the wet end dewatering and paper properties (충전제가 습부 탈수 및 종이 물성에 미치는 영향)

  • Won, Jong-Myoung;Kim, Heung-Bae
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.42 no.4
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    • pp.33-38
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    • 2010
  • The effects of fillers on the wet end dewatering and paper properties were investigated in order to confirm the possibility that the fillers can be used as a means for saving energy in papermaking process. The performance of GCC, PCC and talcs were evaluated. The dewatering in wire and wet press was improved by the increase of filler addition, but it was observed that the dewatering behavior was depended by the filler characteristics. PCC was superior to other fillers in the bulk, opacity, air permeability and stiffness while the lowest tensile and burst index were obtained. We found that the response on the wet end dewatering and paper properties were affected greatly by the filler characteristics including particle shape and size.

Characteristics of the Hardening Shrinkage and Creed of Eporxy Resin Concerte (에폭시 수지 콘크리트의 경화수축 및 크리이프 특성)

  • 허남철;연규석
    • Magazine of the Korea Concrete Institute
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    • v.2 no.1
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    • pp.109-119
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    • 1990
  • This study was accomplished to investigate the characteristics of hardening shrinkage and initial creep of epoxy resin concrete depending on the presence of filler. According to the test results, the hardening shrinkage was increased with increment of sLOrage temperature, and the ef¬feel of tempemture on the hardening shrinkage of epoxy resin concrete with 6% filler was more Significant than that of epoxy resin concrete without filler. Also, the initial creep strain was increased with loading times, stress--strength ratio and elastic strain, and the values for opoxy resin concrete with 6 % filler are higher than that for eposy resin concrete without filler.

Research of Thermal Properties for Liquid Crystalline Epoxy Composites with Tin Oxide Filler (산화주석을 함유한 열경화성 액정 에폭시의 열적 특성에 관한 연구)

  • Hyun, Ha Nuel;Cho, Seung Hyun
    • Composites Research
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    • v.33 no.1
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    • pp.25-29
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    • 2020
  • A liquid crystalline thermosetting-epoxy-based composite was fabricated using diglycidyl ether of 4,4'-biphenol, tin(IV) oxide as a filler, and sulfanilamide as a curing agent. To investigate the thermal behavior, Thermogravimetric Analysis and Laser Flash Apparatus were performed using 3.0-7.0 wt% Tin(IV) oxide. The result showed that the activation energy and thermal conductivity were proportional to the amount of added filler.

Microstructure and mechanical properties of Nd:YAG Laser welded AZ31-H24 Magnesium alloy using AZ61 filler metal (AZ61 filler wire를 사용하여 Nd:YAG Laser 용접한 AZ31-H24합금의 미세조직과 기계적 특성)

  • Ryu, Chung-Seon;Lee, Mok-Yeong;Bang, Guk-Su;Jang, Ung-Seong
    • Proceedings of the KWS Conference
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    • 2007.11a
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    • pp.322-324
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    • 2007
  • Nd:YAG laser welding of AZ31B-H24 magnesium alloy was carried out using AZ61 filler wire(Mg-6wt%Al-1wt%Zn). Microstructure and mechanical properties of welded joint were examined by optical microscopy, scanning electronic microscopy(SEM), energy dispersive spectroscopy(EDS), electron probe micro analyzer(EPMA) and victors hardness, tensile test at the room and elevated temperature. Test results indicate that the specimens welded with AZ61 filler wire have better tensile strength, elongation and victors hardness at room temperature than those of welded without filler wire. However tensile strength are similar but elongation are quite different at elevated temperature.

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Hyaluronic Acid Subdermal Filler for Correction of Lower Eyelid Entropion in a Cat

  • Kim, Youngsam;Kang, Seonmi;Seo, Kangmoon
    • Journal of Veterinary Clinics
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    • v.37 no.5
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    • pp.292-294
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    • 2020
  • A 14-year-old castrated male Persian cat presented with epiphora, blepharospasm, brownish ocular discharge, corneal neovascularization, and corneal opacity in the left eye. Medial lower eyelid entropion was diagnosed through an ophthalmic examination. Since the cat was old and suffered from chronic kidney disease, we decided to perform a hyaluronic acid (HA) subdermal filler injection without general anesthesia rather than surgical correction. After topical anesthesia by lidocaine jelly and disinfection, HA filler was injected into the medial lower eyelid under minimal physical restraint. At the last follow-up 139 days later, lower eyelid entropion was not observed and related clinical signs disappeared. Therefore, HA subdermal filler can be an effective intervention for the treatment of entropion in cats.

Effect of Filler Metal in High Vacuum Brazing of Diamond Tools

  • Song, Min-Seok;An, Sang-Jae;Lee, Sang-Jin;Cheong, Ki-Jeong
    • Proceedings of the Korean Powder Metallurgy Institute Conference
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    • 2006.09b
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    • pp.1307-1308
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    • 2006
  • The purpose of this study was to examine the interfacial reaction between diamond grits and Ni-based, Ag-based, brazing filler metal, respectively. The morphology of the interface between diamond grits and Ni-based, filler metal exhibited a very good condition after this heat treatment. Cr-carbide and Ni-rich compounds were detected by XRD analysis in the vicinity of the interface between diamond grits and Ni-based, filler metal after vacuum induction brazing. Chromium carbide is considered to play an important role in the high bonding strength achieved between diamonds grits and the brazing alloy.

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