• Journal of the Korean Society of Clothing and Textiles
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• v.30 no.1 s.149
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• pp.83-93
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• 2006

The purpose of this study is to analyze the relationship among subjective textures, sensibilities and objective handle of knit fabrics and to provide useful information in planning and designing knit fabrics. We made 20 plain knit fabrics, as specimens, with a combination of 5 kinds of wool/rayon fiber contents and 4 kinds of stitch loop length. For the subjective evaluation, we used 29 questions of subjective textures and sensibilities and employed statistical analysis tools such as factor, Pearson's correlation analysis. An objective handle was measured by Kawabata evaluation system and HV and THV was calculated by KN-402-KT and KN-301-winter. The analysis of a Pearson's correlation with objective properties and handles and structural properties of knit fabrics demonstrated a highly linear relationship. Especially, wool/rayon contents and WT of tensile properties and loop stitch length and G of shear properties showed a correlation coefficient over 0.9. But a relationship of objective properties and subjective textures and sensibilities was non-linear and a linear multi-regression analysis showed that a objective handle had a lower prediction power in the area of subjective textures and sensibilities.

• Carbon letters
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• v.15 no.1
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• pp.45-49
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• 2014

In this study, synthetic viscose rayon fabric has been used for preparing activated carbon fabric (ACF), impregnated with different concentrations of $H_3PO_4$. The effect of $H_3PO_4$ impregnation on the weight yield, surface area, pore volume, chemical composition and morphology of ACF were studied. Experimental results revealed that both Brunauer-Emmett-Teller surface area and micropore volume increased with increasing $H_3PO_4$ concentration; however, the weight yield and microporosity (%) decreased. It was observed that samples impregnated at $70^{\circ}C$ (AC-70) give higher yield and higher microporosity as compared to $30^{\circ}C$ (AC-30). The average pore size of the ACF also gradually increases from 18.2 to 19 and 16.7 to $20.4{\AA}$ for $30^{\circ}C$ and $70^{\circ}C$, respectively. The pore size distribution of ACF was also studied. It is also concluded that the final ACF strength is dependent on the concentration of impregnant.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2011.11a
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• pp.22-22
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• 2011

Ramie는 통풍이 잘 되고 시원하며 가볍고 촉감이 깔깔하여 우리 나라에서 예로부터 여름 옷감으로 사용되어 왔다. 그러나 가격이 비싸고 열에 약한 단점이 있어 가격이 저렴하고 형태 안정성이 우수한 PET와 혼방된 제품으로써 많이 생산되고 있다. 혼방물의 염색 시 각 섬유는 본연의 특성에 맞는 염료를 사용하여 염색하게 되는데, 제품으로 사용하기 위해서는 염색 후 두 섬유의 색 강도를 같게 해줘야 한다. 그러므로 Ramie 섬유의 염색에 사용되는 반응성 염료와 PET 섬유의 염색 시 사용되는 분산염료가 같은 색강도를 가질 수있도록 각 염료의 농도를 찾아내는 것이 중요하다. 혼방물의 염색방법에는 각 섬유의 적합한 염색 조건에 맞는 2개의 염욕에서 순차적으로 염색하는 2욕 염색법과 하나의 염욕에서 각 섬유에 적합한 염색을 진행시키는 1욕 염색법이 있다. 2욕 염색법은 각 염료의 최적조건에서 염색하므로 염색성 및 견뢰도를 극대할 수 있다는 장점을 가지고 있는 반면, 소요시간이 길고 폐수의 양이 많다는 점을 고려할 때 향후 1욕 염색법이 경제적, 환경적 측면에서 효율적이라 할 수 있다. 본 연구에서는 Ramie/PET 혼방섬유의 1욕 염색법과 2욕 염색법을 이용한 염색성을 고찰을 통해 1욕 염색법의 적용 가능성을 고찰하였다.

• Journal of Fashion Business
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• v.20 no.4
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• pp.128-140
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• 2016

In this study, dyeability of Urtica Dioica L. extract, which is relatively less studied, was measured. The extract of this plant was used to dye cellulose and protein fiber to check its usage as a natural green dye. Three different methods were used to produce extract. Dried Urtica Dioica L. was extracted with 100% ethanol, 50% ethanol with 50% distilled water and 100% distilled water. Then dyeing solution was obtained by blending with distilled water at 1-to-1 ratio. The maximum dyeability was obtained when 100% ethanol extract of dried Urtica Dioica L. used to dye fabrics at 60 degrees celsius for 60 minutes without mordant treatment. Cotton, rayon, wool and silk were dyed and dyeability for each fiber was measured for color difference value then compared to its control. The results show that dyeability of rayon and dyeability of wool are stronger, and that when color position for each mordant is measured, color difference is most diverse on cotton with pre-mordant treatment. Color fastness to wash, perspiration and rubbing crockmeter were superb, but color fastness to light was low, therefore, additional study on this is needed to improve. Urtica Dioica L. is now expected to be used practically as green color dye as well as medicinally and edible.

• Journal of Conservation Science
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• v.34 no.6
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• pp.549-556
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• 2018

In November 2011, various artifacts were excavated from the No. 8 stone-lined tomb in Suchon-ri, Gongju by the Chungnam Institute of History and Culture. These included artifacts with lacquered mainframe and silvery metal ornament. These were recovered together with soil and underwent conservation treatment. In this paper, we discuss the scientific analysis and conservation treatment of the lacquered artifacts excavated from the Suchon-ri site. Among our findings is that the artifacts have three layers of lacquer coating and the metal parts are primarily composed of Ag. As the artifacts were recovered with soil from the site, the soil was removed from underneath and inside the artifacts. The inside of the lacquerware was reinforced with rayon paper using 3% funori, and the metal was treated with acrylic resin after removing the acrylic resin previously used to recover the artifact, followed by cleaning. The metal was also internally reinforced with gauze. Finally, the interior reinforcement was made using PVA and resin in pulp and attached with funori to preserve the shape of the lacquerware, and the exposed rayon was finished with acrylic paint. The main advantages of this study are its review of conservation treatment strategies for lacquer artifacts whose numbers have recently increased, and the application of new conservation treatment methods.

• Journal of the Korean Society of Clothing and Textiles
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• v.32 no.3
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• pp.486-493
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• 2008

Safflower red colorants extracted by two solvents including the traditional ash solution and $K_{2}CO_{3}$ solution was used for dyeing cotton, ramie, viscose rayon, silk, wool, and nylon fabrics. The effects of extraction solvents on the reflectance, K/S value, and color properties of the dyed fabrics were investigated. Wash/dry cleaning and light colorfastness were evaluated. Reflectance curves of cotton, ramie, viscose rayon, and silk fabrics dyed with red colorants extracted by $K_{2}CO_{3}$ solution were similar, showing the maximum absorption at 520nm, to that of the dyed fabrics with red colorants extracted by ash solution. The reflectance curves of wool and nylon fabrics were different, showing the maximum absorption at 400nm. K/S values of dyed fabrics with red colorants extracted by $K_{2}CO_{3}$ solution were higher than that by ash solution with the exception of nylon. $L^{*},\;a^{*},\;b^{*}$, and $C^{*}$ of the dyed fabrics with red colorants extracted by $K_{2}CO_{3}$ solution were higher than that by ash solution except for $L^{*}$ of nylon and $b^{*}$ of viscose rayon. Color difference(${{\Delta}E}^*$) of the dyed fabrics between ash solution and $K_{2}CO_{3}$ solution increased in the order named as cotton, silk, ramie, viscose rayon, wool, and nylon. Regardless of extraction solvents, safflower red colorants produced RP color on cotton, ramie, and nylon, R color on viscose rayon and silk, and YR color on wool. Wash/dry cleaning fastness of the dyed fabrics was high above 3/4 rating but light fastness was very poor. It is considered that the use of $K_{2}CO_{3}$ solution instead of the traditional ash solution would be more effective in terms of color reproducibility and extraction process.

• Journal of Preventive Medicine and Public Health
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• v.25 no.1 s.37
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• pp.26-33
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• 1992

The carpal tunnel syndrome is one of the most common peripheral nerve entrapment syndromes. The typical symptoms are pain, numbness and paresthesia in the median nerve territory of the hand. Recently, it is widely recognized that occupational factor is regarded as the important cause of the carpal tunnel syndrome. Clinical study is performed in the 42 female workers who is repetitively working at packing department in a rayon manufacturing factory from November 1991 till March 1992. The study included a questionnaire, physical examinations, and the neurophysiological test. The summary of the results obtained was as follows : 1. Among 42 packing workers, 9 workers(21.4%) were diagnosed as carpal tunnel syndrome by electromyography. The affected side was bilateral in 4 workers(9.5%), right in 4 workers(9.5%), and left in one worker(2.4%). 2. Among 42 subjects, 28 workers(66.7%) complained the clinical symptoms related to carpal tunnel syndrome, 11 workers(26.2%) showed positive Phalen sign, and 7 workers(16.7%) showed positive Tinel sign. 3. Researchers regard electromyographic finding as the gold standard for diagnosis of carpal tunnel syndrome. The sensitivity and specificity of the clinical symptoms to diagnose the carpal tunnel syndrome were 0.89, 0.39 respectively. If the carpal tunnel syndrome is diagnosed by the combination of the positive findings of the symptoms and the physical examinations, either Tinel or Phalen sign, the sensitivity and specificity were 0.67 and 0.76 respectively. Considering above results, though this small number of workers is not adequate for epidemiologic conclusions, carpal tunnel syndrome seems to be an important occupational disorder among packing workers in a rayon manufacturing factory.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2003.04a
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• pp.78-82
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• 2003

셀룰로오스계 재생섬유 중 가장 먼저 개발된 Viscose rayon은 셀룰로오스 펄프를 17-18%의 가성소다 수용액에 팽윤시켜 알칼리 셀룰로스를 만든 뒤 이황화탄소(CS$_2$)에 반응시킨 후 방사하여 제조하며 흡습성, 제전성, 드레이프성 및 광택이 우수한 쾌적성 섬유이다. 그러나 탄성 회복율이 좋지 않으며 강력이 적고 특히 습윤시의 강력 저하의 단점이 있을 뿐만 아니라 제조과정에서 사용하는 이황화탄소의 환경 유해성이 큰 문제점으로 지적되고 있어 선진국들이 점차 설비를 폐쇄하거나 개도국으로 이전하고 있는 실정이다. (중략)

• Journal of the Korean Home Economics Association
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• v.17 no.4
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• pp.15-22
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• 1979

This paper was studied changes of physical properties of Lining fabrics by washing and difference between dry method. I experimented four kinds of Lining fabrics for the sample . The analysis was performed by correlation coefficient analysis and significance tested between correlation coefficients. The results are summarized as follows : 1) Increasing rate of shrinkage tends to call high density and weight. 2) Rayon fabrics is shown the most high rate of shrinkage and decreasing strength by increasing washing times. 3) Drip dry makes little change of physical properties. 4) Polyester fabrics is little by washing times and dry method.

• Journal of the Korean Society of Clothing and Textiles
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• v.21 no.7
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• pp.1117-1123
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• 1997

This paper describes the measurement of thickness of still air layer above fabrics and its relationship to structural properties of fabrics. Rayon fabrics - of both filament and spun - and wool nylon blended fabrics varied in terms of surface hairiness were used. Temperature and relative humidity above fabrics were measured at the various distances from the fabric surface. Increase in the thickness of fabric, fabric weight, yarn count, and crimp resulted increase in thickness of still air layer above fabric. Surface hairiness of fabrics as well as the structural properties were found to be related with the thickness of still air layer above fabrics.