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3성분 섬유 혼용에 의한 Wet-laid 부직포의 구조 및 공학적 성능 평가
차주희,김북성,복진선,전한용,Cha, Ju Hee,Kim, Book Sung,Bok, Jin Seon,Jeon, Han-Yong 한국섬유공학회 2016 한국섬유공학회지 Vol.53 No.2
In this study, polyarylate nonwoven fabrics were manufactured by a wet-laid process by using viscose rayon and amorphous PET fiber as binding fibers. The engineering performance was evaluated after calendering to obtain a compact structure. From the polyarylate wet-laid nonwoven fabrics, it was confirmed that polyarylate fiber and binding fibers were mixed evenly. Through calendering, the permeability and pore size of the wet-laid nonwoven fabrics were significantly reduced owing to the compact structure. The bending strength and tensile strength increased through calendering, but the tensile elongation decreased. From an analysis of the tensile properties, monolayer wet-laid nonwoven fabrics showed better evenness than multilayer wet-laid nonwoven fabrics. In addition, multilayer wet-laid nonwoven fabrics showed a higher anisotropy than monolayer wet-laid nonwoven fabrics.
진공압밀 공법용 등방성 스펀본드 지오텍스타일의 성능평가
안승재,김진일,복진선,이현석,전한용,Ahn, Seung Jae,Kim, Jin Il,Bok, Jin Seon,Lee, Hyun Seok,Jeon, Han-Yong 한국섬유공학회 2014 한국섬유공학회지 Vol.51 No.4
In this study, the performance of isotropic spunbonded geotextiles, which are used in vacuum consolidation, was tested both in the laboratory and in the field. Two kinds of isotropic spunbonded geotextiles were prepared. One was a matrix/binder structure using low-melting polyethylene terephthalate (PET) copolymer (co-PET) fibers for web bonding. The other consisted of sheath/core (co-PET/PET) fibers. Through the index test, it was seen that the performance of the sheath/core structure isotropic spunbonded geotextiles was better for use with vacuum consolidation than the matrix/binder structure isotropic spunbonded geotextiles. However, the drainage performance test, which simulates a construction environment, showed that the sheath/core structure isotropic spunbonded geotextiles were unstable. The matrix/binder isotropic spunbonded geotextiles showed better results for the drainage test and the field test results for the matrix/binder isotropic spunbonded geotextiles showed that they were suitable for use with vacuum consolidation.
반사형 단열재의 표면방사율에 따른 중공층의 열저항에 관한 연구
권영철(Kwon, Young-Cheol),주진갑(Joo, Jin-Gap),조희석(Jo, Hui-Seok),복진선(Bok, Jin-Seon),박창석(Park, Chang-Seok) 한국건축친환경설비학회 2011 한국건축친환경설비학회 논문집 Vol.5 No.2
Reflective insulation systems are fabricated from aluminum foils with a variety of backings, such as kraft paper, plastic film, polyethylene bubbles, or cardboard. Emittance (or emissivity) refers to the ability of a material’ surface to emit radiant energy. All materials have emissivities ranging from zero to one. The lower the emittance of a material, the lower the heat (infra-red radiant energy) radiated from its surface. Aluminum foil has a very low emittance, which explains its use in reflective insulation and radiant barriers. This study indicates the thermal resistance of the reflective air space in "building energy saving guideline" should be changed to reflect its realistic value which is 3 times higher that in the guideline. The surface emittance of reflective insulation should also be under 0.05, which is examined by authorized organizations or laboratories and checked by construction supervisors.