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이재원(Jae Won Lee),임홍빈(Hong Bin Yim),이정민(Jeong Min Lee),모상영(Sang Young Mo) 대한공업교육학회 1979 대한공업교육학회지 Vol.4 No.1
Technical-vocational education programs in British, Frence, German. Japan and United States of America are Studied. The historical, social and economical back ground, technical-vocational education programs as a part of total education system, curriculum organization and technical-vocational teacher training programs in each country are intensively studied and analyzed. Study was conducted for a year by reviewing previous studies and visiting various type of institutes in the selected countries and interviewing with professional staff. Technical-vocational programs in the western countries are closely linked with industries, unions and professional bodies at the stage of program planning, curriculum development and evaluation. Cooperaive program, sandwich program and continuous programs are specially well organized and effectively operated in those countries. Projects, jobs in the workshop are directly related with what they are expected to work upon the completion of the training program and theories are also closely related with the shop work and taught in the shop classes. Modern instructional medias are adapted to make teaching-learning process attractive and effective. Technical-vocational teachers are required to have some years of industry experience and professional studies are much emphasized to be certificated. Employers and industry people in Korea must pay their much attention to the technical high school in order to improve the training programs for their own benifit. It is not wise to expect well trained employees without participating to the training program improvement activities in the technical high schools.
Effect of Glow Discharge Plasma on the Wettability of Polyester Fibre
Mo, Sang-Young 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.2(B)
PET纖維의 親水化를 目的 50㎐ 電源을 使用하여 알곤가스의 글로우 放電에 依해 發生되는 低溫 플라즈머를 利用하여 PET纖維의 表面을 活性化한 後, 여기에 非플라즈머 狀態에서 모노머(아크릴산 증기)를 導入하여 後重合시킴으로서 PET필림의 表面에 그라프트 重合을 이룩하였다. 이렇게 하여 改質된 섬유 表面의 젖음特性을 물의 접촉각으로 評價하였으며, 表面電氣抵抗, ESCA에 依한 表面構造變化를 檢討하였다. 나아가 本 實驗에 關與되는 여러 가지 反應條件中에서 效果的인 처리方案을 찾고자 시도해 보았다.
牟相榮 충남대학교 대학원 1976 論文集 Vol.6 No.-
This study has been investigated on the sizing effect of synthetic size and esterified starch on the fibres, according to the elongation, tensile strength, stiffness and crease recovery of sized fibres. The mechanical properties of the fibres are as follows, 1) The rate of elongation of sized wool ana cotton are decreased, but the others are gradually increased, and sized polyester is markedly increased. 2) The curve of the tensile strength of each fibre shows almost flat. 3) The stiffness of all sized fibres is markdly increased according to size, but regardless of a kind of fibre. 4) The crease recovery of wool and polyester sized by PVA and CMC is predominant in the aspect of the effect on. 5) A little difference between esterified starch and synthetic size on fibres shows in the aspect of effects on, for that reason, esterified starch can be appropriately used as a size on synthetic fibre as well as synthetic size.
플루오르 화합물을 플라즈마 처리한 PET 직물의 방수성 및 투습성
모상영,김태년 忠南大學校 産業技術硏究所 1996 산업기술연구논문집 Vol.11 No.2
Glow discharge plasmas have been arisen much interests in the field of surface modification of polymers. There are much activated species in glow discharge plasma such as electrons(average energy:10eV), radicals and ultra-violet rays(∼40eV)etc. Those of activated energies can be used properly to modify the polymer surfaces. Recently, the demands on fabric which poses a water repellent, proofing and a moisture transpirate characters have been more and more increased. General preparing techniques of those materials are known as (1) surface modification of high bulky and high density fabrics, (2) surface coating with urethane or fluoro resins, (3) lamination with porous films. Among those methods the (1) is superior at moisture transpiration than (2) or (3), but is inferior at water proofing than (2) or (3). If, however, we could improve the water repellency and proofing characters, the process (1) would be the most preferable to other methods. In this work, we have treated PET fabric with each of CF₄, C₂F6, SF 6 and CF₃CF=CF₂plasmas to develop high functional fabric which preserves a moisture transpiration and water proofing natures. Modified properties were evaluated by breakthrough water pressure and water vapor permeation rate. The change of surface morphology was observed by SEM. Results obtained are (1) The moisture transpiration of CF₄-treated fabric was superior as much as untreated fabric, and those of C₂F6-treated, SF6-treated fabrics were inferior in 1∼3%, and that of C₃F6-treated fabric was the most inferior in 15%. (2) At very low pressure treatment condition, it tend to be more hydrophilic except C₃F6-treated fabric. (3) The best treatment condition were 0.09 torr, 90∼120 seconds in CF₄, 0.05 torr, 60∼90 seconds in C₂F6, 0.1 torr, 90 seconds in SF6 and 01 torr, 60 seconds in C₃F6 respectively.
Polyethylene terephthalate 纖維의 防汚加工에 關한 硏究
牟相榮,孟琦錫,李文洙 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.1
Soil resistant properties imparted to polyethylene terephthalate fabric by silicone and fluorochemical resin treatment have been investigated. The percent soiling and the stiffness of PET fabric were measured by color and color difference meter and handle-o-meter in different concentration of resin emulsions. The resin thicknesses on the PET fabric were calculated in the different resin concentrations. Optimum concentrations of silicone resin emulsion and fluorochemical resin emulsion were 3% o. w. f. and 1% o. w. f. respectively. The fluorochemical resin emulsion was more effective than the silicone resin emulsion for wet and oil stain resistant. Thickness of coated resin wee favorable at above 3% silicone resin emulsions, however the thickness treated with 0.5% resin emulsion was not significantly different from those of the 2% treating in case of fluorochemical resin emulsions. Surfactants such as dispersing agent, softner and antistatic agent added to the emulsions proved to be ineffective but antistatic agent did have some effect at concentrations below 0.5% in case of dry soiling.
綿織物의 Silicone 防水加工에 있어서 界面活性劑의 影響
牟相榮,李廷玟 忠南大學校 1974 論文集 Vol.13 No.1
The broad objective of this study is to investigate the effect of surfactants other than silicone water-repellent on the spray rating of water-repellent cotton fabrics. Specific objectives of the work are to measure qualitatively the effect of selected surfactants on water repellency, to study some of the mechanisms by which they act, and to develop a test to determine the suitability of cotton fabric for silicone water-repellent treatment. Four surfactants were chosen for study. They were dye fixative, wetting agent, penetrating agent and silicone defoamer most widely-used. Of the surfactants studied, wetting and penetrating agent had the greatest effect on the water repellency. Dye fixative and silicone defoamer had a relatively little effect. In general, the effect of the surfactants was more pronounced when they were present in the repellent treating bath than when they were on the fabric prior to treatment.