• Advanced Composite Materials
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• 제16권4호
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• pp.349-360
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• 2007

Recently, natural fiber reinforced composite is attracting attention and considered as an environmentally friendly material. Usually cellulosic fibers are used to reinforce the composites, but some protein fibers such as silk and wool serve the same purpose. In this paper, we proposed a method of producing artistic composite from artistic fabric by using silk fiber reinforced biodegradable plastic, which is designated as 'silk composite', for reinforcement. In order to expand applications of the silk composite, we performed the compression molding of decorative laminates with woody material, which was selected as a core material, and examined the properties of molded decorative laminates with various content of the silk composite. Since plywood and medium-density fiberboard (MDF) are widely used for decorative laminates, we selected them as core materials. As a result, flexible decorative laminates with high flexural strength were obtained by compounding the silk composite with wood materials.

• 한국의류학회지
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• 제27권11호
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• pp.1279-1290
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• 2003

The purpose of this study was to make a scale for measuring the subjective hand of fabrics. For this purpose subjective hand expressions which were published in the journals were reviewed. 11 pairs(9 biopolar-pairs, 2 unipolar-pairs) were selected after searching the definitions in a dictionary followed by focus group interview and survey. To find out if these terminological biopolar pairs are agreed with the biopolar pairs in human sensation, a survey of fabric hand was undertaken using a scale consisted of 20 words(18 words from biopolar-pairs, 2 words from unipolar pairs). Among 11 pairs, 10 pairs except [taktakhada-poksinhada] were accepted as biopolar pair of word terminologically and sensuously. [taktakhada-poksinhada] was recognized as a biopolar pair terminologically but not sensuously. These 20 words were classified as 5 factors-surface contour, density, flexibility, dampness, and extensibility

• 한국염색가공학회지
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• 제13권2호
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• pp.49-49
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• 2001

Interlace texturing is very useful method to make compound yarns for new synthetic fabrics. In this study, we make the compound yarns for peach skin fabric by interlace texturing method. This study surveys relationship between physical properties of interlace textured yarns and process conditions such as air pressure, yarn tension and take-up speed. Nip density, tensile properties and multi-step shrinkage of the various specimens were discussed with process conditions.

• 한국의류산업학회지
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• 제2권3호
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• pp.234-238
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• 2000

In this study it was measured seam strength of T/C which has the different processing methods and density. Also it was measured seam strength by the change of angle in the pattern and the kinds of threads. The results of this study are as follows; The seam strength is stronger in order of $90^{\circ}/90^{\circ}$ > $0^{\circ}/0^{\circ}$ > $70^{\circ}/-70^{\circ}$ > $70^{\circ}/70^{\circ}$ > $60^{\circ}/60^{\circ}$ > $60^{\circ}/-60^{\circ}$ > $30^{\circ}/30^{\circ}$ > $30^{\circ}/-30^{\circ}$ > $45^{\circ}/-45^{\circ}$ > $45^{\circ}/45^{\circ}$ by the cutting directions, in order of T/C3>T/C1>T/C4>T/C2 by the samples and in order of 60's/3>40's/2>60's/2>50's/2 by the threads.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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• pp.935-938
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• 2004

In this work, carbon nanofibers have synthesized a low temperature using DC Ar Plasma and Fe-Phthalocyanine, and a characteristic difference of the synthesized CNF according to the location of the substrate was investigated. the density of CNFs synthesized on the position (a) were higher than that synthesized on the position (b) [See the Fig. 1]. Also, the length of CNFs was different. In the shape, CNFs with screw and straight line shape were synthesized in the position (a), but only CNFs with straight line shape were synthesized in the position (b). The difference have an important effect on the field emission characteristics.

• 한국가금학회지
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• 제44권1호
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• pp.11-18
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• 2017

본 연구는 국내 산란계 동물복지 인증농가의 사육시설 및 사육형태에 따른 기초 사료를 수집하기 위해 수행하였다. 조사를 위하여 동물복지 인증을 받은 64농가에 설문지를 발송하였으며, 이 중 20농가(31.3%)에서 설문지가 회수되었다. 20농가의 사육시설별 현황은 보온덮개계사, 자연농법계사, 판넬철골조계사가 각각 4농가(20%), 7농가(35%), 9농가(45%)였으며, 사육밀도별 현황은 2~3수/$m^2$ 2농가, 4~5수/$m^2$ 10농가, 6~7수/$m^2$ 8농가였다. 사육형태별 현황은 평사 14농가(70%), 방사 3농가(15%), 평사+방사 3농가(15%)였다. 보온덮개계사와 자연농법계사의 사육밀도는 대부분의 농가에서 4~6수/$m^2$ 로 사육하였고, 판넬철골조계사는 9농가 중 7농가에서 6~7수/$m^2$로 사육하였다. 사료섭취량은 20농가 중 11농가(55%)에서 120~130 g을 섭취하였으며, 보온덮개, 자연농법, 판넬철골조계사의 농가 수가 각각 3농가(15%), 3농가(15%), 5농가(25%)이었다. 사육시설별 산란피크는 보통 24~28주령이었고, 산란율 80% 이상의 농가는 보온덮개 75%, 자연농법 56.2%, 판넬철골조계사 67%이었다. 호흡기 질병 발병률이 55%로 가장 높았으며, 보온덮개계사 75%, 자연농법계사 70%, 판넬철골조계사 33%가 발병하였다. 대장균증은 판넬철골조계사에서만 나타났으며, 발병률은 44%였다. 동물복지 인증을 받은 계란(특히 판넬철골조계사) 중 70%가 대형마트나 지역판매장으로 유통되었다. 사육형태에 따른 계란가격은 평사 14농가 중 6농가(42.9%)가 계란 1개당 200~250원으로 계산되었다. 이런 결과들은 현재 동물복지 인증농가의 생산실태를 보여주고 있다.

• 한국재료학회지
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• 제2권4호
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• pp.298-305
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• 1992

본 연구에서는 2D-woven fabric에 결합재로 페놀수지를 사용하여 성형한 CFRP의 탄화거동을 관찰하였다. TMA분석 결과 적층 두께방향에서는 365-37$0^{\circ}C$ 법선방향에서는 118-12$8^{\circ}C$ 에서 치수변화가 일어났다. 각 온도 구간별로 광학현미경으로 관찰한 결과 CFRP제조시 형성된 크랙이나 기공은 열처리온도에 따라 성장하였으며, 400-50$0^{\circ}C$ 부근에서 새로운 많은 크랙이 형성되었다. 기공률과 밀도가 400-50$0^{\circ}C$ 에서 급격히 변화한 것을 볼 때 이 구간에서 복합재 내부에서 크랙이 형성 및 성장하는 것을 알 수 있었다. 따라서 CFRP를 탄화할 때 승온속도를 구간별로 조절할 필요성이 있는 것으로 판단되었다.

• 한국의상디자인학회지
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• 제14권1호
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• pp.111-121
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• 2012

This study focused on the plane and side drape coefficients of weft knitted fabrics as a function of knit structure, stitch density, and stiffness. Fifteen weft knitted fabrics are produced with five different structures (interlock, single pique, royal interlock, cross miss interlock, and mock royal interlock) and three different gauges (7G, 10G, and 12G). Five knit structures were the application of knit, tuck, and miss stitch on the basis of interlock of the double knit fabric For this purpose, three-dimensional shapes of the draped sample were obtained by using a drapability tester which can record the contour line coordinates of a projected plane drape. Then, projected shapes of the plane and side drape were derived from those three-dimensional ones to review the relationship between plane drape coefficients and side ones. It was found that the theoretical values of plane and side drape coefficients depending on the change of deflection angles fit to their experimental ones. A5 a result of a regression analysis of the relationship between plane and side drape coefficients, the relationship could be expressed as $y=0.5838x-0.0065x^2+9.03{\times}10^{-5}x^3$. In case of mean of drape coefficient, it was increased according to the rule of that the more tuck and miss stitch overlap. A high degree of correlation was found between stiffness and drape coefficient. The regression equation of drape coefficient($y$) can be represented by $y=y=\sqrt[3]{Stiffness}-10.72$.

• 한국의류학회지
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• 제30권11호
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• pp.1626-1635
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• 2006

The purpose of this study was to search for comfortable protective clothing for waste incinerator workers. The experimental protective clothing came in two types: one whose outer side made use of polypropylene film, and the inner side, a non-woven rayon fabric processed with charcoal with a 10% density (CF): and one whose outer side made use of polyolefine and polyamide films, and the inner side, a non-woven polypropylene fabric (NNCF). Experiments were conducted on five healthy adult women whose average age was 21. These experiments were conducted at a climate chamber, in which the temperature and relative humidity were set below $28{\pm}1^{\circ}C\;and\;50{\pm}10%$, respectively. Measured were the rectal temperature, the skin temperature, the sweating rate, the weight loss, the heart rate, the blood pressure, the temperature, and the relative humidity of a microclimate and subjective sensation. These were measured within a period of 60 min, consisting of a 20-min stable period, a 20-min exercise period (walking exercise for 2 miles/hr on a treadmill), and a 20-min recovery period. Through this experiment, the differences between the human body's physiological reactions to CF and NNCF clothing, and the human body's comfort levels when wearing these, were determined.

• 한국의류학회지
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• 제30권6호
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• pp.981-991
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• 2006

The purpose of this study was to determine the practicability of an experimental protective clothing by identifying the human body's physiological responses to it as well as the human body's comfort level when wearing it, particularly with the use of a processed charcoal material. The experimental protective clothing came in two types: one whose outer side made use of polypropylene film, and the inner side, a non-woven rayon fabric; and one whose inner side made use of a non-woven fabric processed with charcoal with a 10% density. Experiments were conducted on five healthy adult women whose average age was 21. These experiments were conducted at a climatic chamber, in which the temperature and relative humidity were set below $28{\pm}1^{\circ}C\;and\;50{\pm}10%$, respectively, and were measured within a period of 60min, consisting of a 20-min rest period, a 20-min exercise period, and a 20-min recovery period. Based on the results of this study, the efficiency of the processed charcoal material was reviewed, and a database requiring the production of more functional and comfortable protective clothing materials was established.