• Title/Summary/Keyword: Finishing Materials

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A Study on the Basic Properties of Exterior Insulation Plasterer Finishing Materials by Addition of Calcium Carbonate Powder (탄산칼슘계 분말 첨가에 따른 외단열 미장 마감재의 기초물성에 관한 연구)

  • Shin, Joung-Hyeon;Jo, Su-Yeon;Jung, Ui-In;Kim, Bong-Joo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2021.05a
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    • pp.213-214
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    • 2021
  • External insulation method is used to conserve energy of buildings. However, the current external insulation method uses organic insulating materials to become a diffusion path in case of fire. In this study, the purpose of this study is to provide basic data on the required performance of the plastering material according to the CaCO3 powder addition of the finishing material of the external insulation method. In Figure 1, when powder was added, the adhesion strength decreased by 30% to 35% at 10% and 0% to 50% at 20% compared to Plain. In Figure 2, the moisture permeability increases approximately twice when powder is added. The results for the water absorption coefficient are shown in Figure 3.

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Effect of Disperse Dyeing on UV-curable Flame-retardant Finish of PET Fabrics (분산염료 염색공정이 PET직물의 UV경화형 방염가공에 미치는 영향)

  • Jeong, Yong-Kyun;Jang, Jin-Ho
    • Textile Coloration and Finishing
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    • v.20 no.2
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    • pp.66-74
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    • 2008
  • Effect of disperse dyeing on flame retardant finishing of PET fabrics via UV curing using three UV curable phosphorous-containing methacrylates and ammonium polyphosphate(APP) was investigated. The dye fixation and flame retardancy of PET fabrics did not change significantly with excellent durability to five laundering cycles irrespective of the dyeing and finishing sequence. However, the flame retardancy of Pekoflam-treated fabrics was lower than that of the UV treated and decreased substantially when heat treatment was carried out before the dyeing. The dyeability of the flame-retardant PET fabrics was not affected in the case of UV curing of the methacrylates alone. However, UV finishing after the dyeing caused significant decrease in K/S and ${\Delta}E$ due to changed refraction and inherent color of surface coating of the UV curable monomers and APP. Whereas the heat treatment with Pekoflam decreased both color fastness to laundering and sublimation, surprisingly the UV finish of PET fabrics before and after the dyeing increased the color fastness probably resulting from the presence of photopolymerized surface layer on the fabrics.

Characterization of PETG Thermoplastic Composites Enhanced TiO2, Carbon Black, and POE (TiO2, Carbonblack 및 POE로 보강된 열가소성 PETG 복합재료의 특성)

  • Yu, Seong-Hun;Lee, Jong-hyuk;Sim, Jee-hyun
    • Textile Coloration and Finishing
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    • v.31 no.4
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    • pp.354-362
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    • 2019
  • In order to apply thermoplastic composites using PETG resin to various industrial fields such as bicycle frames and industrial parts, it is necessary to verify the impact resistance, durability and mechanical properties of the manufactured composite materials. To improve the mechanical properties, durability and impact resistance of PETG resin, an amorphous resin, in this study, compound and injection molding process were carried out using various additives such as TiO2, carbon black, polyolefin elastomer, and PETG amorphous resin. The thermal and mechanical properties of the thermoplastic composites, and the Charpy impact strength. The analysis was performed to evaluate the characteristics according to the types of additives. DSC and DMA analyzes were performed for thermal properties, and tensile strength, flexural strength, and tensile strength change rate were measured using a universal testing machine to evaluate mechanical properties. Charpy impact strength test was conducted to analyze the impact characteristics, and the fracture section was analyzed after the impact strength test. In the case of POE material-added thermoplastic composites, thermal and mechanical properties tend to decrease, but workability and impact resistance tend to be superior to those of PETG materials.

Study of Dye Encapsulated Microcapsule Polymerization Using Styrene Monomer (스타이렌 모노머를 이용한 색소 담지 마이크로캡슐의 제조)

  • Kim, Ji Yeon;Woo, Ji Yun;Min, Mun Hong;Yoon, Seok Han;Yeo, Ji Ae;Ghim, Han Do;Yeum, Jeong Hyun
    • Textile Coloration and Finishing
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    • v.28 no.3
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    • pp.164-174
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    • 2016
  • In this study, dye-encapsulated microcapsules were produced by emulsion polymerization using styrene monomer. The study showed that the average size of microcapsules were $2{\sim}5{\mu}m$ in normal distribution. These microcapsules induced pale yellow(A12) and reddish yellow(B24) color by thermochromic fluoran yellow(dye A) and red(dye B). These microcapsules were changed to dark yellow(A12) and scarlet(B24) color depending on temperature change. The weight of microcapsules decreased by 7% to 11% during the heating ranges from $320^{\circ}C$ to $350^{\circ}C$ implying that the styrene microcapsules had thermal stability upto $300^{\circ}C$.

Manufacture and Characteristics of Sound Absorption Materials by Finishing of Meltblown Nonwovens (멜트블로운 부직포의 후가공 공정에 의한 흡음재의 제조와 특성)

  • Song, In-Hee;Kim, Jin-Soo;Hong, Young-Ki
    • Textile Coloration and Finishing
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    • v.23 no.4
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    • pp.304-311
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    • 2011
  • For sound absorption and sound insulation in automobile industry, the sound absorption materials based on meltblown nonwovens were prepared by SMS (spunbond-meltblown-spunbond) technique. And the sound absorption coefficient (${\alpha}$) of the meltblown nonwoven, produced with isotatic-polypropylene(PP), was examined for the various processing conditions such as die-to-collector distance(DCD), nonwoven weight(GSM), and air suction conditions. The meltblown nonwoven for sound absorption materials was composed of bulky microfiber web, increasing with increases in weight and DCD. The sound absorption coefficient(${\alpha}$) was excellent as a sound absorption materials of PAD type composed of SMS(spunbond-meltblownspunbond) nonwovens.

Antimicrobial Agents and Applications on Polymeric Materials (고분자재료에 대한 항균성 물질과 적용)

  • Lee, Jae-Woong
    • Textile Coloration and Finishing
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    • v.20 no.3
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    • pp.39-56
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    • 2008
  • A wide variety of materials including aldehydes, cationic agents, alcohols, peroxygens, phenols and chlorinated phenols, metal ions are being employed as biocides. Among three levels for biocidal functions (sanitization, disinfection and sterilization), disinfection is an enough level for antimicrobial textiles. In terms of antimicrobial agents for textile applications, quaternary ammonium salts (QAS), chitosan, metal and metal salts, N-halamine based materials are developed with numerous research and the positive ions of those materials may result in disinfection of microorganisms. Photocatalysts, especially titanium dioxide (titania) produces the hydroxyl radical (${\cdot}\;OH$) which causes inactivation of microorganisms after UV radiation, have been used for antimicrobial applications.

Development of Multi-Porous Diamond Wheel for Smooth and Mirror Finishing of Die Materials (금형재료의 정밀연삭을 위한 다기공 다이아몬드 숫돌의 개발)

  • 허성중
    • Journal of the Korean Professional Engineers Association
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    • v.30 no.6
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    • pp.144-152
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    • 1997
  • Development of diamond wheel with fine grains and multi-pore structures were newely attempted to be studied in this paper. Wheels, that are employed for the smooth and mirrow finishing of die materials such as tungsten carbide alloy using tool and die materials, must have both performances to remove tool marks efficiently and to contact elastically with curved surfaces. Diamond abrasive grains were bonded firmly by a melamine to prevent the decrease of machining efficiency due to grain sinking within the bond materials. Also, highly foamed structures were developed to increase the flexibility of the wheel, and to induce active self-sharpening by increasing contact pressure between the wheel and work sufaces. In this paper, melamine-bonded diamond wheels are trial manufactured, then the forming method of wheels are explained.

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Selection Method of Eco-friendly Finishing Materials Considering Cost Efficiency for the Aged Housing Remodeling Projects (노후 공동주택 리모델링의 경제성을 고려한 친환경 실내 마감재료 선정 방안)

  • Kim, Ki-Hyun;Kim, Kyung-Rai;Hwang, Young-Gyu
    • Korean Journal of Construction Engineering and Management
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    • v.9 no.4
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    • pp.84-91
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    • 2008
  • "Eco-friendly construction" is an emerging issue in the building industry. Main purpose of the eco-friendly construction is to sustain the health and environment of building residents and to minimize the harmful effect on their environment. Apartment residents have great concern on eco-product, since many cases are reported that Sick Building Syndrome is caused by toxic substance from building materials. Environmental performance is to meet through using the highest grade eco-friendly materials. However, generally eco-friendly materials are more expensive than normal materials, Therefore, using eco-friendly materials at public housing project is limited to economical aspect. The purpose of this paper is development of eco-friendly material selection model considered cost efficiency. The selection of Eco-friendly finishing materials and their methods are constructed to consider environmental performance level and cost index compositively. Development of eco-friendly material selection method is economic and reasonable one when public housing is constructed.

Selection Method of Eco-friendly Finishing Materials Considering Cost Efficiency for the Aged Housing Remodeling Projects (노후 공동주택 리모델링의 경제성을 고려한 친환경 실내 마감재료 선정방안)

  • Kim, Ki-Hyun;Kim, Kyung-Rai;Han, Ju-Yeoun
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2007.11a
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    • pp.953-956
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    • 2007
  • "Eco-friendly construction"is an emerging issue in the building industry. Main purpose of the eco-friendly construction is to sustain the health and environment of building residents and to minimize the harmful effect on their environment. Apartment residents have great concern on eco-product, since many cases are reported that Sick Building Syndrome is caused by toxic substance from building materials. Environmental performance is to meet through using the highest grade eco-friendly materials. However, generally eco-friendly materials are more expensive than normal materials. Therefore using eco-friendly materials at public housing project is limited to economical aspect. The purpose of this paper is development of eco-friendly material selection model considered cost efficiency. The selection of Eco-friendly finishing materials and their methods are constructed to consider environmental performance level and cost index compositively. Development of eco-friendly material selection method is economic and reasonable one when public housing is constructed.

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Physical characteristics of ceramic/glass-polymer based CAD/CAM materials: Effect of finishing and polishing techniques

  • Ekici, Mugem Asli;Egilmez, Ferhan;Cekic-Nagas, Isil;Ergun, Gulfem
    • The Journal of Advanced Prosthodontics
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    • v.11 no.2
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    • pp.128-137
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    • 2019
  • PURPOSE. The aim of this study was to compare the effect of different finishing and polishing techniques on water absorption, water solubility, and microhardness of ceramic or glass-polymer based computer-aided design and computer-aided manufacturing (CAD/CAM) materials following thermocycling. MATERIALS AND METHODS. 150 disc-shaped specimens were prepared from three different hybrid materials and divided into five subgroups according to the applied surface polishing techniques. All specimens were subjected up to #4000 grit SiC paper grinding. No additional polishing has been done to the control group (Group I). Other polishing procedures were as follows: Group II: two-stage diamond impregnated polishing discs; Group III: yellow colored rubber based silicone discs; Group IV: diamond polishing paste; and Group V: Aluminum oxide polishing discs. Subsequently, 5000-cycles of thermocycling were applied. The analyses were conducted after 24 hours, 7 days, and 30 days of water immersion. Water absorption and water solubility results were analyzed by two-way ANOVA and Tukey post-hoc tests. Besides, microhardness data were compared by Kruskal-Wallis and MannWhitney U tests (P<.05). RESULTS. Surface polishing procedures had significant effects on water absorption and solubility and surface microhardness of resin ceramics (P<.05). Group IV exhibited the lowest water absorption and the highest microhardness values (P<.05). Immersion periods had no effect on the microhardness of hybrid ceramic materials (P>.05). CONCLUSION. Surface finishing and polishing procedures might negatively affect physical properties of hybrid ceramic materials. Nevertheless, immersion periods do not affect the microhardness of the materials. Final polishing by using diamond polishing paste can be recommended for all CAD/CAM materials.