• 한국해양공학회지
• /
• 제15권2호
• /
• pp.124-129
• /
• 2001

The research on anticorrosive of valve for ship, waterworks, and drainage system is very important. The purpose of this paper is to develop the metal/polyurethan adhesive technique at insider of the value to prevent corrosion in the value. It is performed to the bending strength test by using metal /polyurethan in the metals (SB41, Al6061). It is investigated to the effects of bending strength on curing temperature, preheating time and curing time, and to the fracture mechanism of metal/polyurethan adhensived specimen. As a results, we find that the bending strength is the highest at curing temperature of 11$0^{\circ}C$ and the curing time is 60 minutes in metal/polyurethan adhesive specimen.

• 월간포장계
• /
• 통권89호
• /
• pp.168-184
• /
• 2000

• Korean Chemical Engineering Research
• /
• 제45권4호
• /
• pp.372-377
• /
• 2007

본 연구에서는 생물학적 공정을 사용하여 황화수소를 제거하는데 있어 망상구조의 폴리우레탄 담체의 바이오필터 충진물로서의 특성을 유입가스농도와 유입가스량의 두 변수를 대상으로 조사하였다. 실험결과 망상구조의 폴리우레탄 담체를 적용한 바이오필터의 황화수소 최대제거용량은 $488.3g-H_2S/m^3{\cdot}h$이었으며, 추정된 임계부하속도는 $330.1g-H_2S/m^3{\cdot}h$이었다. 본 연구의 결과 망상구조의 폴리우레탄 담체를 황화수소의 생물학적 처리를 위한 바이오필터의 담체로서 적용가능성을 확인하였다.

• 한국복합재료학회:학술대회논문집
• /
• 한국복합재료학회 2002년도 추계학술발표대회 논문집
• /
• pp.193-197
• /
• 2002

Polyurethane casting wing fairings included in F-5E/F 15% spar kit are to be installed on aircraft wing surfaces and used for compensating the changes of the aerodynamic configuration by the leading edge extension fairings. These fairing are mandatory items in repairing wing areas and was imported from foreign supplier with long term delivery and high cost. Accordingly, local manufacturing is necessary to get rid of above disadvantages such as long term delivery and high cost. Basic properties test of specimen to be developed and part's requirements after localization was taken and its values were similar or higher when comparing with the original's even in low temp test at -55C. Casting mold process was used to manufacture the polyurethane fairings and its demensional stability ＆ physical condition was proper and met to the related specification and drawing's requirements

• Journal of the Korean Wood Science and Technology
• /
• 제17권1호
• /
• pp.12-21
• /
• 1989

This experiment was executed to investigate the characteristics of gloss and color difference in coated films by N.C. Lacquer, Aminoalkyd, Polyester. and Polyurethan coating after chemical (distilled water, ethyl alcohol. acetic acid, and sodium hydroxide) and heating ($120^{\circ}C$) treatments, cold-check test, and U.V. radiation. The results obtained were summarized as follows 1. The gloss decreasing rate by water resistance test was the least among chemicals treated on coated films. 2. The color difference of coated films chemical treatments highly and similarly increased, except the alkali treatment showing a little increase. 3. In the color difference by U.V. radiation, the polyester coated film showed generally large difference compared with the other coated films.

• 한국섬유공학회:학술대회논문집
• /
• 한국섬유공학회 1995년도 추계 학술발표회
• /
• pp.82-83
• /
• 1995

• 한국의류학회지
• /
• 제26권10호
• /
• pp.1467-1477
• /
• 2002

This study was investigated physical properties of stretch fabrics by KES-FB system to show suitable basic data to making skirts of excellent capacity and develop more organized basic skirt pattern by fitness evaluation. 1. The results of T. H. V.(Total Hand Value) were as followa: In the kind of blending fiber, cotton/spandex was more excellent than nylon/spandex and polyester/spandex, in the direction of stretch, one-way(weft inserted polyurethan yarn) polyester/spandex and cotton/spandex were higher than two-way(warp and wet inserted polyurethan yarn) polyester/spandes and cotton/spandex, two-way nylon/spandex was higher than one-way nylon/spandex. 2. The results of calculating the variance between sample stretch fabrics and Japanese s/s women's suit fabrics after standardizing were as follows: Stretch fabrics has 2 range of tensile, bending, shearing, compression, surface, thickness and weight as compared with Jpanese s/s women's suit fabrics. In the tensile property, one-way stretch fabrics were almost the same with Japanese s/s women's suit fabrics, only two-way polyester/spandex had+1～+2 range. In the bending, shear property, there was no difference between sample fabrics and Japanese s/s women's suit fabrics 3. In the total fitness of the skirt, nylon/spandex is the best in the fabrics and one-way stretch fabric is better than two-way strethch fabric.

• 한국연초학회지
• /
• 제2권1호
• /
• pp.61-67
• /
• 1980

韓國煙草硏究所, 大邱試驗場(北緯35$^{\circ}$49')에서 1979年 透明한 fiber glass로 지은 円柱型 greenhouse(4.50$\times$3.83$\times$2.80m)內에 乾燥室의 外壁 및 天井을 Polyurethan에 함석을 입혀 黑色 paint로 coating한 板을 heat absorber겸 斷熱板으로, 乾燥室 양편에 各各 4.5㎥의 자갈을 넣은 gravel heat storage system 그리고 greenhouse內의 加熱된 空氣를 練燒室로 誘導할 수 있는 air duct를 설치한 8.25㎥의 太陽熱 直接利用 方式의 Bulk 乾燥材와 同一한 크기의 Bulk 乾燥材를 比較 試驗하였다. 乾燥期間中 外溫 30.5~35.5$^{\circ}C$, 總日射量 1004.2~1436.2 cal/$\textrm{cm}^2$의 條件下에서 3回 乾燥 試驗한 結果, 天井 heat absorber의 最高溫度는 89$^{\circ}C$이였으며, 練燒室로 吸入되는 空氣의 最高溫度는 64$^{\circ}C$이며 평균 46$^{\circ}C$로서 外溫에 비하여 18$^{\circ}C$가 높았고, 慣行Bulk乾燥材에 비하여 25%의 燃料가 節減되였다.

• 한국의류학회지
• /
• 제11권2호
• /
• pp.57-67
• /
• 1987

The purpose of this study was to confirm the effects of girdle on the physiological responses and the microclimate in summer. The measuring points were rectal temperature, skin temperature, pulse rate and sweat volume as physiological responses and the inside clothing temperature, relative humidity as microclimate when the subjects wore girdle (girdle A; polyurethan+nylon, girdle B; polyurethan+cotton) for the period of rest and exercise in climate chamber. The enviromental conditions were at $25^{\circ}C$ ($65{\pm}5\%$ RH) and $30^{\circ}C$ ($75{\pm}5\%$ RR). The results were as followings. 1. Mean skin temperature increased in girdle during the exercise at $30^{\circ}C$. 2. The pulse rate decreased in girdle during the rest at $25^{\circ}C$. In the case of girdle A, it was remarkably decreased. Rectal temperature increased in girdle A and B during the exercise at $25^{\circ}C$. But the kinds of girdle didn't affect the pulse rate and rectal temperature. 3. The total sweat volume in girdle was larger than in control. 4. The difference between skin temperature and inside clothing temperature of abdomen had a tendency to increase at all experiment condition. 5. The relative humidity of inside ($RH_1$) and outside ($RH_2$) of girdle increased in girdle during the rest at $25^{\circ}C$ and $30^{\circ}C$. And the relative humidity of wearing girdle B was hig-her than girdle A during the rest at $25^{\circ}C$ and $30^{\circ}C$. The $RH_1$ after stepping at $30^{\circ}C$ was the highest in girdle A and the lowest in control. From this point of view, we concluded that physiological responses and the microclimate were affected by wearing girdle. And mean skin temperature and relative humidity of inside clothing were affected by the materials of girdle.

• 한국섬유공학회:학술대회논문집
• /
• 한국섬유공학회 2007년도 학술발표회 논문집
• /
• pp.543-544
• /
• 2007