• 펄프종이기술
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• 제30권4호
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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.

• 한국생산제조학회지
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• 제20권4호
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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.

• 한국안전학회지
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• 제19권4호
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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.

• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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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.

• 펄프종이기술
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• 제42권4호
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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.

• 콘크리트학회지
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• 제2권1호
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• pp.109-119
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• 1990

이 연구는 충진재의 유무에 따른 철근 콘리크트의 경화수축과 초기 크리이프 특성을 실험적으로 구명한 것이다. 그 결과, 경화수축은 보관온도가 높아질수록 커졌고, 충진재를 사용한 경우가 온도의 영향을 더 크게 받는 것으로 나타났다. 또한, 초기 크리이프는 재하시간과 응력일강도화가 증가함에 따라 증가했고, 강성변형이 클수록 컸는데, 이는 충진재를 첨가한 경우가 더 크게 나타났다.

• Composites Research
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• 제33권1호
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• pp.25-29
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• 2020

Diglycidyl ether of 4,4'-biphenol을 기지로 사용하고, tin(IV) oxide를 filler로, sulfanilamide를 경화제로 사용하여 액정성 열경화성 에폭시 기반 복합재료를 제작하였다. TGA와 LFA를 이용하여 3.0-7.0 wt%의 tin(IV) oxide를 분산시켜 제작한 복합재료의 열적 거동을 조사한 결과, 열분해 활성화 에너지와 열전도성이 filler의 첨가량에 비례하는 것으로 나타났다.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2007년 추계학술발표대회 개요집
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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.

• 한국임상수의학회지
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• 제37권5호
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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.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part2
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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.