• 한국인쇄학회지
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• 제29권3호
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• pp.41-53
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• 2011

For manufacturing the tape for repairing archival documents, we tested ten carrier candidates for selecting best material. The tensile strength, transmissivity, stability of deterioration, and processability were determined. Physical-chemical characteristics and stability of deterioration was best to the Hanji. Tensile strength and transmissivity was best in tracing paper, but was low in oil paper, white sketch paper, lyon coat paper. Synthetic carrier to tensile strength showed higher than paper carrier and to the transmissivity showed 2-8 times higher than paper carriers. The tracing paper to the transmissivity was 10 times higher than others. To determine characteristic of conservation to the selected carriers, stability of deterioration was examined at conditions of $90^{\circ}C$ for 15 days. Oil paper and white sketch paper turned strongly yellowish. Cellulopane, Felt, and Cpp film showed stable stability of deterioration, but deformation like wrinkles. PET film and Syntheletic film showed excellent conservation characteristics without any change of exterior. Test of adhesive uniform between carriers and adhesive processability was performed. PET film > Syntheletic film > Tracing Paper in order were determined. Ununiformal adhesive characteristics appeared to Hangi. Accordingly, we thought that Hanji as carrier material might be unsuitable because of low adhesive processability.

• Elastomers and Composites
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• 제39권4호
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• pp.263-273
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• 2004

The effects of zinc surfactant (ZB) on the bis(triethoxysilylpropyl)disulfide (TESPD)-silica mixture in natural rubber (NR) and solution butadiene-co-styrene rubber(S-SBR) were compared with respect to their rheological property, processability, physical properties, and silica dispersion. In the NR compound, addition of the ZB increased the reversion resistance time (T-2), the tensile modulus, and the BO time; however, lowered the viscosity, the HBU, and tans values. In the S-SBR copound, addition of the ZB increased the $tan{\delta}$ values while lowered the T-2, the tensile modulus the BO time, the viscosity, and the HBU of the compound. In the NR compounds, addition of the ZB significantly increased the processability and mechanical property. However, in the S-SBR compounds, it improved the processability the mechanical property was not improved.

• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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• pp.135-136
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• 2006

The shear flow properties have been reported in many cases by manufactures and fabricators. Only this characteristic is sometimes insufficient for the processings to provide a complete picture of the relationship between the processability and the flow behavior when underwent free-surface processes in which the shape and thickness of the extrudate are determined by the rheological properties of the melt, the die dimensions etc. In this paper the methodology of control of elongational flow is discussed in terms of relaxation time control of the polymer melts.

• 폴리머
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• 제32권1호
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• pp.1-6
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• 2008

Acrylonitrile butadiene rubber(NBR)의 접착력 및 가공성을 향상시키기 위한 연구를 하였다. 최상의 조건을 선별하기 위해서 NBR의 acrylonitrile(ACN) 함량에 따른 접착물성 및 가공성을 관찰하였다. 무늬 점도, 충전제, 가소제 및 가교제가 접착력에 미치는 영향도 조사하였다. NBR의 ACN 함량은 NBR sealing에서 접착거동 및 가공성에 큰 영향을 미침을 알 수가 있었다. 최상의 혼합 조건을 알기 위해서 분산도를 조사하였다. 분산도는 혼합순서, 시간 및 온도 등의 많은 인자들에 의해 영향을 받는 것이 확인되었다. 가교시스템은 황 가교시스템, 과산화물 가교시스템, 가교밀도 및 구조 등의 관찰로 연구하였다. 접착제의 변화는 건조 상태와 hexamine 함량 등과 같은 것으로부터 NBR과 접착제 사이의 관계를 연구하였다. 이 결과 접착 물성과 가공성은 ACN 함량 및 가교시스템에 따라 차이를 보였다.

• Carbon letters
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• 제10권3호
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• pp.190-197
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• 2009

Various silanes, amino silane, vinyl silane, sulfur silane (TESPD), and ZS (TESPD/zinc soap complex), are added into chlorinated isobutylene-isoprene copolymer (CIIR)/soft clay/carbon black (CB) and CIIR/hard clay/CB compounds and they are investigated with respect to the vulcanization characteristics, the processability, and the mechanical properties. Comparing hard clay and soft clay filled compounds, hard clay (Suprex) filled system shows a higher die C tear than the soft clay (GK) filled one. The other properties (Mooney, extrusion torque/pressure, torque rise ($M_H-M_L$), modulus at 300%) are close to each other. Among various silanes, the ZS treated hard clay (Suprex) compound shows the highest mechanical property following hard clay(S)/vinyl silane(V) and soft clay(GK)/vinyl silane(V) compounds. The TESPD and the ZS effectively helps a formation of a strong 3-dimensional network structure between silica and CIIR via coupling reaction due to bifunctional nature of TESPD. In addition to that, the ZS added compounds show both a better processability and mechanical properties compared to the S2 ones at low concentration due to improved compatibility between zinc soap and CIIR matrix. Only the ZS added compound shows both improved processabilities (Mooney, Extrusion torque-& pressure) and improved mechanical properties (degree of crosslinking, elongation modulus, tear, and fatigue to failure counts) on both CIIR/hard clay/CB and CIIR/soft clay/CB compounds.

• Design & Manufacturing
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• 제12권2호
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• pp.46-50
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• 2018

Recently, as machine components and products are getting smaller, it is demanded to develop superprecision production technologies multilaterally. Along with the advancement of production technology, people are paying keener attention to the development of eco-friendly technology and efficient processing technology. Particularly, in many industries related to automobiles, shipbuilding, or airplane components, it is demanded to obtain technology to process multiple micro-holes. On account of this trend, micro-hole processing employing high-power electron beams is rising nowadays, and more interest is being shown in it, too. In Korea, however, the process of manufacturing vaporized amplification sheets influencing high-power electron beam processing technology and the processability considerably has not been developed sufficiently yet. Therefore, this study has applied vaporized amplification sheets manufactured to analyze the processability of high-power electron beams and examine necessity for vaporized amplification sheets.

• Journal of the Korean Wood Science and Technology
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• 제33권6호통권134호
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• pp.55-62
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• 2005

본 연구는 섬유판 가공 부산물 분말을 충전제로 첨가한 바이오복합재를 제조하여 그 적용가능성을 평가하기 위하여 수행하였다. 섬유판 가공부산물인 고밀도섬유판(high density fiber board, HDF) 부산물 분말을 polyolefin계 고분자인 low-density polyethylene (LDPE)과 polypropylene (PP)에 첨가하여 바이오복합재를 제조하였다. 제조된 바이오복합재를 이용하여 기계적 성질과 가공성을 측정하였다. 이후 각각 목분(wood flour, WF)과 왕겨분말(rice-husk flour, RHF)을 LDPE와 PP에 충전제로 첨가한 바이오복합재와도 그 기계적 성질과 가공성을 비교하였다. HDF 분말-LDPE 바이오복합재와 HDF 분말-PP 바이오복합재의 인장강도 및 충격강도는 각각 목분이나 왕겨분말을 LDPE나 PP에 충전제로 첨가한 바이오복합재와 비슷한 기계적 강도값을 나타내었다. 바이오복합재의 가공성은 토크를 측정하였는데, HDF 분말-LDPE 바이오복합재와 HDF 분말-PP 바이오복합재는 동일한 기질고분자에 목분이나 왕겨분말을 첨가한 바이오복합재보다 낮은 값을 보였다. 또한, HDF 분말-LDPE 바이오복합재 및 HDF 분말-PP 바이오복합재는 HDF 분말의 입자분포와 상관없이 일정한 가공성을 보였다. 따라서 섬유판 가공 부산물이 첨가된 바이오복합재를 현재 바이오복합재 산업에서 이용되고 있는 바이오복합재를 대처하여 적용할 수 있다고 볼 수 있다.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2003년도 The Korea-Japan Joint Symposium
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• pp.65-66
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• 2003

Ternary blend fibers (TBFs) based on melt blends of PEN, PET, and TLCP were prepared by melt blending and spinning to achieve high performance fibers. The reinforcement effect and the TLCP fibrillar structure resulted in the improvement of mechanical properties for TBFs. Molecular orientation was an important factor in determining the tensile strength and modulus of TBFs. Another part of this research is silica nano-particle filled PEN composites were melt-blended to improve mechanical and physicalproperties, and processability. The tensile modulus and strength were improved adding silica nano-particles to the PEN. The decreased melt viscosity by the fumed silica resulted in the improvement of the processability. The fumed silica may act as a nucleating agent in the PEN matrix.

• 유변학
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• 제10권4호
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• pp.256-258
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• 1998

선형저밀도폴리에틸렌(LLDPE)의 필름 제조시 가공성 및 필름의 투명성을 개선하기 위한 실험을 하였다. LLDPE에 전자선을 조사하여 분자구조를 변형시켜줌으로써 가공 특성 및 광학적 특성이 향상된 필름을 얻을 수 있었다. 전자선 조사량의 세기를 조절하여 일정량만 조사하고 자외선 안정제를 소량 처방하면 필름 가공시 젤이 생기지 않았고 투명성 및 가공성이 개선되었다.

• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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• pp.369-369
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• 2006

Compatibilizers contribute to many processes in polymer industry, such as manufacturing polymer blends and composites. They are usually designed to be block or graft form which is combined in polar and non-polar parts in the first synthesis process level, for example, the general form of maleic anhydride (MA) as a compatiblizer is a grafted counterpart. However, the process of making the compatibilizer is related to the first synthesis level and it has some problems, such as high cost, poor processability, limitation on use and properties, and so on. So, in order to improve its poor processability and overcome the limitation on use, we developed compatibilizers which have various chemical forms by high intensity ultrasound and super critical fluid nitrogen in polymer melt reactive extrusion.