• 제목/요약/키워드: Enamel Paint

검색결과 10건 처리시간 0.023초

선박용 레이다의 허상 방지용 PAINT형 전파흡수체의 개발 (Development of Paint-type EM Wave Absorbers for Radar Used in Ships)

  • 정재현;김동일;송재만;최정현
    • 한국마린엔지니어링학회:학술대회논문집
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    • 한국마린엔지니어링학회 2005년도 전기학술대회논문집
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    • pp.423-428
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    • 2005
  • We prepared paint-type and sheet-type EM wave absorbers with Mn-Zn Ferrite, Ni-Zn Ferrite, Ba Ferrite, Sr Ferrite, and Sendust against ghosts of a mater in ships. To prepare the absorbers, enamel paint and epoxy paint were used as binders. The prepared EM wave absorber's absorption properties were investigated. The prepared EM wave absorbers have 6 dB over in 2 GHz ${\sim}$ 4 GHz. We compared properties of wave absorption between paint-type and spray-type

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Development of Paint-type and Spray-type Electromagnetic Wave Absorbers

  • Song Jae-Man;Kim Dong-Ii;Choi Jeung-Hyun;Jeung Jae-Hyun;Kim Ki-Man
    • Journal of electromagnetic engineering and science
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    • 제5권4호
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    • pp.172-175
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    • 2005
  • Sometimes, it is more convenient to use paint-type and spray-type EM wave absorbers than bulk-type or sheet-type. Thus, in this paper, we prepared paint-type and spry-type EM wave absorbers. The proportion of ferrites to paints, particle size of magnetic material, and kinds of paint should be considered to prepare a superior paint-type EM wave absorber. There is no big gap between spray-type and paint-type in EM wave absorption of EM wave absorbers prepared with same composition.

Paint형 전파 흡수체의 전파 흡수 성능 향상에 관한 연구 (A Study on the Improvement of EM Wave Absorption Characteristics in Paint-type EM Wave Absorbers)

  • 제승훈;김동일;최정현
    • 한국전자파학회논문지
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    • 제17권4호
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    • pp.330-334
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    • 2006
  • 본 논문에서 Sendust, Mn-Zn, Ni-Zn, Ba, Sr Ferrite를 사용하여 페인트형 흡수체를 제작하였다. 지지재로서는 enamel, epoxy, urethane 페인트들을 사용하여 각각 흡수능을 측정하였다. 그리고 $Al(OH)_3$으로 코팅한 흡수체의 대역폭은 코팅을 하지 않은 것보다 더 넓어지는 것을 알 수 있다. 또 2 mm 두께의 적층형 흡수체는 X-band에서 대략 20 dB의 흡수능을 보여준다.

백자채색봉황모란문병 보존처리와 금채장식 기법 연구 (Research on Technique of Gold Powder Painting and Conservation Process for White Porcelain Bottle with Phoenix and Peony Design Poly Chrome)

  • 이다혜;황현성
    • 박물관보존과학
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    • 제12권
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    • pp.25-34
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    • 2011
  • 본 고에서는 백자채색봉황모란문병의 전반적 보존처리 과정과 일부 결손된 채색부분인 금채장식 복원에 적합한 복원 재료와 보존방법을 다양한 실험을 통해 소개하고자 한다. 결손되거나 박락된 금채장식을 복원할 수 있는 방법으로는 전통적인 방법과 현대적인 방법이 있는데, 이번 연구실험을 통해 가장 적합한 복원방법을 알아낼 수 있었다. 또한 이번 금채장식 복원과정에서는 전통적인 금채장식방법 대신에 아크릴물감과 바인더를 섞어 문양 테두리의 금채부분을 복원한 현대적인 금채 채색방법을 선택하여 복원하였다.

VOC Analyzer를 이용한 목재용 도료의 휘발성유기화합물의 간이측정 (Test Method Using VOC Analyzer to Measure VOC Emission of Paints for Wood-based Panel)

  • 엄영근;김기욱;안재윤;김현중;문석중
    • Journal of the Korean Wood Science and Technology
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    • 제35권6호
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    • pp.65-72
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    • 2007
  • VOC Analyzer는 공기 중에 포함되어 있는 VOC (휘발성 유기화합물) 중 toluene, ethyl benzene, xylene, styrene 등 4가지 방향족 탄화수소 가스 농도를 측정하는 측정 장비이다. 검출기에는 고감도 반도체 가스센서를 사용한 가스크로마토그래피방식으로써 캐리어 가스로서는 봄베공기를 사용한다. 또한, 대기 중에 포함되어 있는 다양한 가스성분을 농축하지 않고 VOC를 분리 검출하여 농도를 편리하면서도 자세하게 측정할 수 있으므로 건축자재, 페이트, 도료, 접착제 등에서 응용될 수 있다. 이러한 장점을 가진 VOC Analyzer를 이용하여 목재에 주로 사용되는 도료로부터 VOC 방사거동을 확인하였다. 실험은 시편을 밀봉하여 실험개시 후 일정시간 간격으로 48시간까지 측정하였다. 수용성 페인트와 enamel 페인트의 VOC 방산량은 lacquer와 urethane vanish에 비해 상대적으로 적었으며 4개의 샘플 중에서 lacquer의 VOC 방산량이 가장 높게 나타났다. VOC Analyzer를 이용한 측정법은 현재 사용되고 있는 VOC 측정방법 중 가장 빠르고 경제적인 기술이기 때문에 앞으로 널리 사용된 것이라 기대된다.

이중센서를 이용한 코팅막 두께 측정 가능성 평가 (Measurement Feasibility Assessment of Coating Film Thickness using Dual Sensor)

  • 김주현;김성렬;김정욱;김화영;안중환
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2004년도 추계학술대회 논문집
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    • pp.78-81
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    • 2004
  • A technical performance of the coating depends greatly on the thickness of painting film or coating film. Therefore the confirmed report of the technique to measure accurately is essential to the coating film thickness for the assessment about a coating quality performance. In this paper, two gap sensors - eddy current gap sensor and capacitance gap sensor - which has a different operating principle were used to measure the thickness of a nonmagnetic substance coating film such as paint, enamel or ceramic that was coated on the metallic material. A capacitance gap sensor was used to measure the distance between the sensor head and a coating film and an eddy current gap sensor to measure the distance between the sensor head and a base metal. Then the thickness of a coating film was obtained by the difference of two measurement value. At this result, the suggested dual sensor can measure an arbitrary film thickness to be coated on a base metal as the measurement value of coating thickness exists accurately within the 2% error.

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다핵방향족탄화수소류에 노출된 페인트 취급 근로자에서 요 중 1- Hydroxypyrene을 이용한 생물학적 모니터링 (Biological Monitoring of Paint Handling Workers exposed to PAHs using Urinary 1-Hydroxypyrene)

  • 이종성;김은아;이용학;문덕환;김광종
    • 한국산업보건학회지
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    • 제15권2호
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    • pp.124-134
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    • 2005
  • To investigate the exposure effect of polynuclear aromatic hydrocarbons (PAHs), we measured airborne total PAHs as an external dose, urinary 1-hydroxypyrene (1-OHP) as an internal dose of PAHs exposure, and analyzed the relationship between urinary 1-OHP concentration and PAHs exposure. The study population contained 44 workers in steel-pipe coating and paint manufacture industries. The airborne PAHs was obtained during survey day, and urine were sampled at the end of shift. Personal information on age, body weight, height, eniployment duration, smoking habit, and alcohol consumption was obtained by a structured questionnaire. Airborne PAHs were analyzed by the gas chromatograph with mass selective detector. Urinary 1-OHP levels were analyzed by the high performance liquid chromatograph with ultraviolet wavelength detector. For statistical estimation, t-test, ${\chi}^2$-test, analysis of variance, correlation analysis, arid regression analysis were executed by SPSS/PC (Windows version 10). The mean of environmental total PAHs was $87.8{\pm}7.81{\mu}g/m^3$. The mean concentration ($526.5{\pm}2.85{\mu}g/m^3$) of workers in steel-pipe coating industries using coal tar enamel was the higher than that ($17.5{\pm}3.36{\mu}g/m^3$) of workers in paint manufacture industries using coal tar paint. The mean of urinary 1-OHP concentration ($51.63{\pm}3.144{\mu}\;mol/mol$ creatinine) of workers in steel-pipe coating industries was the higher than that ($2.33{\pm}4.709{\mu}\;mol/mol$ creatinine) of workers in paint manufacture industries. The mean of urinary 1-OHP concentration of smokers was the higher than that of non-smokers. There was significant correlation between the urinary concentration of 1-OHP and the environmental concentration of PAHs (r=O.S48, p<0.001), pyrene(r=0.859, p<0.001), and urinary cotinine (r=0.324, p<0.05). The regression equation between the urinary concentration of 1-OHP in ${\mu}g/g$ creatinine($C_{1-OHP}$) and airborne concentration of PAHs (or pyrene) in ${\mu}g/m^3$ ($C_{PAHs}$ or Cpyrene) is: Log ($C_{1-OHP}$)=-0.650+0.889×Log($C_{PAHs}$), where $R^2=0.694$ and n=38 for p<0.001.Log ($C_{1-OHP}$)=1.087+0.707${\times}$Log(Cpyrene), where $R^2=0.713$ and n=38 for p<0.001. From the results of stepwise multiple regression analysis about 1-OHP, significant independents were total PAHs and urinary cotinine (adjusted $R^2=0.743$, p<0.001). In this study, there were significant correlation between the urinary concentration of 1-OHP and the airborne concentration of PAHs. The urinary 1-OHP was effective index as a biomarker of airborne PAHs in workplace. But it was influenced by non-occupational PAHs source, smoking.

모로코인(人)의 장신구(裝身具)와 화장(化粧)에 관(關)한 연구(硏究) (A Study of the Personal Ornaments and Make-up of Maroccan)

  • 이순홍
    • 패션비즈니스
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    • 제5권2호
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    • pp.15-34
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    • 2001
  • Ornaments are accessories for the decoration of the body or dress. They aren't unavoidably required one, but serve to make one's dress perfect as decorative industrial art objects. In Morocco, ornaments were initially used as a sign of social position or the class or an incantatory symbol. In effect, they were originally employed to adjust one's dress, not just for decoration, and they were of use for household economy. Gold, silver and handcraft available for exchange were a means of increasing one's property and an indication of social standing and wealth. In particular, the dress and jewelry of a bride was a measure of her family's wealth, regarded as a symbol of her chastity and value. The ornaments symbolically back up people's faith in supernatural power, and their real value is based on implicit form or way of decoration, not the external shape. Specifically, there is a tendency to use the form of animal as a protector, not one to frighten people. In the artistic tradition of Morocco, fish pattern stands for water and rain, and eagle and bird are considered to be related to fate. Scorpion and lizard are depicted as an inquirer of sun, and snake is a symbol of abundance and sexual instinct, being viewed to have an ability to cure disease. Turtle pattern is a symbol of saint because it protects one from the evil. The ornaments are made of gold, silver, amber, clam, garnet, glass, nielle, enamel, glaze, coral or tree, and symbolic patterns are used, including hand(a symbol of five numerals), turtle, lizard, scorpion, eye, triangle, bird and eggs. They are very big and diverse, being categorized into ornaments for the head or the chest, neckless, fibula, earring, bracelet and ring. For Moroccans, make-up is a sort of instinctive behavior to meet aesthetic and sexual desire. They also wear make-up for practical purpose of protection, intentionally inflict a wound on the skin for ceremonial or religious purpose, paint the skin with pigment, or have the part of the body tattooed for incantatory purpose. All this actions are regarded as make-up. The raw material of cosmetics is aker, a vegetable dye. They get the lips or cheeks turn red and paint eyebrows with yellow saffran powder to have a bad devil lose its strength. Tattooing is mainly done by women and viewed as a sign of their value or social organization they belong to. Sometimes that is used to represent a woman's being old enough to marry or getting married already or the frequency of marriage. Besides, tattoo is believed to prevent or remedy loose bowels or cough, depending on its location or pattern, and they often change tattoo according to the change of beauty art.

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시너(thinner)의 물리화학적 특성과 랫트의 생식기에 미치는 영향 연구 (A Study on thinner's Physicochemical property and its effect on genital organ of rat)

  • 김현영;이성배;한정희;김태균;이정석;강민구;이채관
    • 한국산업보건학회지
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    • 제18권3호
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    • pp.224-238
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    • 2008
  • The aim of this study is to confirm the physicochemical property and hazard of thinner (012), which is a diluent of enamel paint used for floor coating for waterproofing and oil painting for the outer wall. The literatures of physicochemical property and hazard of thinner were surveyed and its physicochemical property were evaluated. And then, the inhalation toxicity of thinner affecting the central nervous system and reproductive organs in rats were examined by subchronic (6 h./day. 5 days/ week for 13 weeks) inhalation test. 1) According to the 13-week subchronic inhalation test, there were no significant changes in clinical test and body weight. However, a significant evidence of toxicity was observed in the hematological test and organ weight such as heart, kidney, liver and brain (p<0.01) in the 200 ppm and 1,000 ppm exposure groups in a dose response manner. In the histopathology analysis, there were no significant evidence of toxicity. Therefore, thinner was not classified as an organ targeted toxic agent. In case of Harmfulness, it could be classified as a chronic toxic agent 3($500 ppm/4hr, rat). 2) The reproductive toxicity such as extension of the period of estrous cycle, reduction of serum estradiol concentration and increase of frequency of the abnormal sperm was observed in the 1,000 ppm exposed animals. 3) The result of the physicochemical property of the test material showed that the specific gravity was 0.793, boiling point $155.8^{\circ}C$, steam pressure 2.1 kPa, ignition point $34.5^{\circ}C$, and spontaneous ignition point $280^{\circ}C$. The endothermic and exothermic values were 371.4 J/g and 159.1 J/g. respectively. The explosion limit was 214 mg/l. These data showed that thinner could be classified as an explosion agent level 1.2 and ignitive liquid agent 3 ($23-60^{\circ}C$) according to the notification No. 2008-1 of the Labor Ministry, "Classifying Standard of Chemical Materials."

부산,경남에서 판매되는 시너(Thinner)의 구성 성분 중 벤젠 등 일부 독성물질의 함량과 물질안전보건자료에 관한 연구 (Compositions and Contents of Thinner and Reliability of MSDS sold in Busan and Gyeongnam Province)

  • 김유영;양승혁;이정실;이형숙;장공화;진구원;이용일;주우홍;백도현;강대욱;문자영;조용권;박동욱;윤충식;하권철
    • 한국산업보건학회지
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    • 제16권4호
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    • pp.314-323
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    • 2006
  • This study was conducted to identify ingredients of thinners and to confirm reliability of material safety data sheets (MSDS) of thinners for public and workers' health. The 41 thinner products were collected from paint shops located in Busan and Gyeongnam province. The 12 thinner products among them were identified using product MSDS. GC-MSD was used to analyze 41 kinds of thinners qualitatively and quantitatively. The 12 products MSDS were compared with thinner's component through qualitative analysis to confirm MSDS. Chemical ingredients, such as Benzene, Toluene, and Xylene etc., of thinners were analysed in quantity. The 41 thinner products contained 17 disclosed specific, trade name, or generically described chemical solvent ingredients. These 17 ingredients came under 6 classes: alcohols, aromatic hydrocarbons, esters, glycol ethers, ketones, and mixtures. These 17 ingredients were important in the view of industrial hygiene and had occupational exposure limit in the ambient, such as toluene, xylene, acetone, nonane, EGEE, heptane, cumene, MIBK, indene, tri-methyl benzene, etc, were found in 41 kinds of thinners. Aromatic hydrocarbons were the most identified ingredient in thinners. Especially, the benzene, which induces leukemia, was found in 4 kinds of thinners. The content rates of benzene in thinners were 0.25~1.18%. The benzene in enamel thinner, which were 0.39~0.72%, was highest from chemical classification. The contents of toluene, which was found from 27 kinds of thinners, were 5.35~64.16%, which were highest in sobu thinner as 58.80%. Xylene was found from 22 kinds of thinners and contents of xylene were 4.61~72.42%. Acrylic thinner's contents of xylene were 12.06~51.05%, which was most high. It was found that contents of benzene were increased and frequency of detection was decreased through comparison with other study. The MSDS possession rate of paint shops was low as 29.27%. So it did not provide information with public or workers. Mean of agreement rate between MSDS and components of thinners through qualitative analysis was 42.01% and it has wide range from 8.3% to 75%. There are many deficiencies in MSDS about component of thinners. In some case of sample, expecially, despite containing benzene, information was not written it on MSDS.