• Title/Summary/Keyword: WASH

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Development of Newly Formulated High-strength Wash Primer for Membrane LNG Carrier (멤브레인형 LNG 운반선용 고강도 워시프라이머 개발)

  • Song, Eun-Ha;Lee, Sung-Kyun;Chung, Mong-Kyu;Baek, Kwang-Ki
    • Special Issue of the Society of Naval Architects of Korea
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    • 2007.09a
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    • pp.48-56
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    • 2007
  • Wash primer was applied to cargo tank of Membrane-LNG Carrier (M-LNGC) for corrosion resistance and high bond-strength with the mastic. However, a lack of bond-strength verification at high thickness wash primer coating resulted in strict coating thickness control. Therefore wash primer was controlled below DFT(Dry Film Thickness) $30{\mu}m$. In order to develop the wash primer satisfying GTT (GAZ TRANSPORTAION TECHNIGAZ) standard even at high thickness, we evaluated coating properties such as wash primer/mastic bond-strength, corrosion resistance, as well as workability for the newly formulated wash primer materials. The newly formulated wash primer had high bonding-strength to mastic even at high thickness and had proper corrosion resistance and workability suitable to yard condition.

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A study on shrinkage of textile for embroidery with special reference to wash and textile weave (수예재료 포지의 수축성에 관한 연구)

  • 박정순
    • Journal of the Korean Home Economics Association
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    • v.12 no.34
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    • pp.701-709
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    • 1974
  • A study on shrinkage after wash of several cotton textiles for embroidery on the market produced the following results : 1. As the wash temperature rises, the shrinkage increases. 2. Shrinkage of sample 2 and 3, variant weave of plain weave, is greatest, and the next is that of sample 1, a variant of plain weave. Shrinkage of sample 4 and 6, which have more floating, is small. 3. In the wash, thickness of the textile increases with rise of the temperature. 4. Strength of the textile increases with rise of the wash temperature.

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Development and Commercialization of Wash Free Rice Equipment (홍국(Red Yeast Rice)개발)

  • 성창근
    • Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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    • 2002.08a
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    • pp.86-98
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    • 2002
  • When the quality and cooking characteristics of wash free rice was compared with those of control milled rice during storage, smaller quality change during storage and more easy to cook was found in wash free rice than control. The wash free rice equipment manufactured in foreign country was carefully investigated and commercial wash free rice equipment with 1metric ton per hour capacity was made considering the characteristics of domestic rice cultivar. Modification of the equipment was made through the repeated field test, and the technique on wash free rice equipment was transferred to the RICETECH. These systems were manufactured in RICETECH will be exported to China next year.

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Changes of Surface Characteristics of Polyester Fabrics on the Deposition and the Removal of Oily Soils (I) - The Effect of Wash Cycles on the Water- and Oil-repellent Finished Fabrics in Detergency - (유성오구의 부착과 제거에 있어서 폴리에스테르 직물의 표면특성 변화 (I) -발수발유 가공포의 반복세척 효과-)

  • 이정숙;하희정
    • Textile Coloration and Finishing
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    • v.11 no.6
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    • pp.24-35
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    • 1999
  • This study was carried out to investigate the changes of surface characteristics of polyester fabrics on the deposition and the removal of oily soils from polyester fabrics in detergency, The relations between the removal of soil and the changes of surface properties of polyester fabrics treated with water- and oil-repellent agents were discussed before and after various wash cycles. Two kinds of fluoropolymers were selected as water-and oil-repellent finishing agents. The effects of water- and oil-repellent finishes were determined by the water repellency and oil repellency. The surface properties of untreated and treated polyester fabrics were evaluated with respect to contact angle and wicking time. The treatment of polyester fabrics with fluoropolymers improved efficiently water repellency, oil repellency, contact angle and wicking time. But those properties were greatly decreased after 3 times of wash cycles in detergency The deposition of oily soils on the untreated fabrics was drastically increased with increasing of wash cycles. The deposition and the removal of oily soils from fabrics treated with fluoropolymer having hydrophobic components were very low after various wash cycles. The deposition and the removal of oily soils on the fabrics treated with fluoropolymer having hydrophilic components were high comparatively after various wash cycles. Even though the surface properties of treated fabrics were greatly decreased with the increasing of wash cycles, the remains of oily soils on the fabrics were lower than those of untreated fabrics in various wash cycles. But the remains of soils were drastically increased after 10 times of wash cycles in any cases.

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A Design and Implementation of a Wireless Audio Sharing (WASH) System (Wireless Audio Sharing (WASH) 시스템 설계 및 구현)

  • Son, Ji-Yeon;Kim, Myung-Gyu;Yang, Il-Sik;Park, Jun-Seok
    • Journal of KIISE:Information Networking
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    • v.33 no.2
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    • pp.139-148
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    • 2006
  • Recently with the advancement of local wireless communication technologies, digital trends of audio contents and devices are paving the way for new experiences to network-based audio streaming services. In this paper, we present the Wireless Audio Sharing (WASH) technology over Bluetooth and Wireless Local Area Network (WLAN). WASH system provides an audio sharing mechanism over multiple users and also provides stereo audio streaming between Bluetooth-enabled devices and Universal Plug and Play (UPnP) media devices connected to wired/wireless LANs. To achieve these, we extended the Bluetooth audio distribution profile and combined the extended profile with the UPnP AV architecture. With the implementation of this WASH technology, we show some experimental results of the stereo audio streaming in a real environment.

Evaluation of a Rapid Sand Filter with Surface Wash and Backwash Conditions (정수장 급속여과지 역세척 수위변화와 시간에 따른 세척 효율 평가)

  • Jung, Yong-Jun;Min, Kyung-Sok
    • Journal of Korean Society on Water Environment
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    • v.20 no.6
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    • pp.652-656
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    • 2004
  • Both surface wash and backwash are considered as one of the most important methods that can improve the filtration efficiency in the existing water treatment plant. This study has mainly focused on the improvement of filtering efficiency by controlling surface wash and backwash time, and water level before backwash (when drained up to the trough, when drained up to 10 cm above filter bed, and when drained below 10 cm filter bed). Filtration efficiency was shown a little bit of differences depending on the operating conditions like surface wash injection pressure, the distance control between filter bed and the facility, and the types of surface wash. When the water level before backwash was reached up to 10 cm below filter bed after draining, however, the filtration velocity and the turbidity removal efficiency in the filter bed was improved. When the surface wash followed by backwash is longer, it showed a similar result. Because the proper adjustment of surface washing time makes filtration efficiency higher, therefore, it is necessary to set up the backwash time moderately.

Wash Interval Optimization to Prevent Atmospheric Corrosion of Korean Aircrafts Made of Aluminum Alloys (알루미늄 합금 대기부식 예방을 위한 대한민국 공군 항공기 세척주기 최적화 연구)

  • Park, Won Dong;Gook, Phil Jun;Cho, Younho;Bahn, Chi Bum
    • Corrosion Science and Technology
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    • v.15 no.4
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    • pp.189-197
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    • 2016
  • It is a common practice to conduct periodic washes at designated intervals in order to prevent the atmospheric corrosion of aircraft. The wash interval depends on the atmospheric conditions, but the wash intervals set by the U.S. Air Force were widely adopted in Korea without detailed knowledge of the background data. Therefore, it is necessary to determine our own wash intervals representing the atmospheric and geographical conditions in Korea. This study analyzed previous wash interval algorithms and atmospheric data in Korea. New wash intervals are then proposed based on the corrosion rate equation in ISO-9223:2012. Atmospheric corrosion testing was conducted using 7075 and 1050 aluminum alloy specimens to verify the accuracy of the corrosion rate equation in ISO-9223:2012. Test results showed a reasonable agreement with the corrosion rates predicted by the equation.

An Experimental Study on the Compressive Strength Property of Concrete with Ground granulated Blast Furnace Slag Using Wash Water from Recycled Aggregates (순환골재 세척수를 혼입한 고로슬래그 콘크리트의 압축강도 특성에 관한 실험적 연구)

  • Jung, Sang-Kyung;Shin, Sang-Yeop;Kim, Young-Soo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.05a
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    • pp.34-35
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    • 2015
  • The purpose of this study is to investigate the compressive strength property of concrete with Ground granulated blast furnace slag(GBFS) using wash water from recycled aggregate. When GBFS is reacted with water, it doesn't happen to hydraulic reaction but GBFS becomes latent hydraulic property in alkaline environment. For this reason, if it is possible to use wash water from recycled coarse aggregate as mixture water, GBFS have the advantage of early strength due to effect of activation. We investigated the compressive strength properties of GBFS concrete using wash water from recycled aggregate. According to the experimentation result, ICP-OES showed wash water from recycled coarse aggregate has a high alkali value of pH of 12. Also, compressive strength in early age using wash water can be improved as an activation.

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EFFECT OF CONTAMINANTS ON THE PUTTY-WASH BOND STRENGTH IN TWO-STEP RELINE TECHNIQUE USING VINYL POLYSILOXANE IMPRESSION MATERIALS (Vinyl Polysiloxane 인상재를 이용한 이회 인상법에서 contaminants가 putty-wash 결합력에 미치는 영향)

  • Kim, Mu-Hyon;Jeong, Chang-Mo;Jeon, Young-Chan;Hwang, Hie-Seong
    • The Journal of Korean Academy of Prosthodontics
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    • v.34 no.2
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    • pp.266-276
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    • 1996
  • Numerous factors are known to affect the accuracy of elastomeric impression materials. Factor often overlooked is the quality of the bond between putty and wash during corrective reline impression technique. The putty-wash bond strength must be strong enough to over-come the local stress at putty-wash interface. It is not always possible to avoid saliva contamination in making corrective wash impres-sion. And putty preliminary impression material con be used as a template for provisional restoration. Human saliva and the residual monomer of autopolymerizing acrylic resin are thought to affect the bond strength and the failure type. This study examined the effect of contaminants like human saliva, and residual resin monomer on the putty-wash bond strength and the effectiveness of treatment. 1. Of the tested three brands of Vinyl Polysiloxane impession meterial, Express Exhibited the greatest bond strength followed by Eamix and Perfect showed the lowest putty-wah bond strength. 2. Coating the putty substrates with human saliva did not produce decreased failure load in all the breands of Vinyl Polysiloxane impression meterail. 3. Of the three brands of VPS impression material that were exposed to methhylmethacry-late resin(Jet), only the putty-wash bond strength of the Perfect group diminished signifi-cantly. Moreover, all the specimens from group C of Perfect exhibited adhesive failure. 4. Exposing the substrates to ethylmethacrylate resin(SNAP. diminished the putty-wash bond strength significantly. With Perfect and Examix, failure occurred cohesively through the light-body, whereas with Express, failure occurred adhesive-cohesively. 5. Removing approximately 1mm thickness of the contaminated putty interface was the most effective treatment in countering the undesirable effect caused by residual resin monomer. The putty-wash bond strength of the groups that were treated with 1mm even putty reduction was not significantly different from those of control groups. With Perfect and Examix, cleaning the specimens with gauze soaked in 70% isopropyl alcohol increased the putty-wash bond strength, but was not as effective as 1mm even reduction of contaminated putty substrates. With Express, 70% isoproryl alcohol treatment exhibi0ted comparable putty-wash bond strength to that of control group.

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Studies on Wash and Wear Silk Finishing collaborating Anticrease (방추성을 겸한 견직물 Wash and Wear 가공연구)

  • Choe, Byong-Hee;Lee, Yang-Hoo
    • Journal of Sericultural and Entomological Science
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    • v.24 no.1
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    • pp.39-41
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    • 1982
  • 1981년에 견직물 Wash and Wear가공 연구를 국제견업협회(I.S.A) 기술분과위원회에서 발표하였든바 의외로 지대한 관심을 보였는데, 금년초 동협회로부터 8개 종류의 견직물을 송부해와 본 연구의 재확인을 하고싶다 하여 기왕이면 방추성도 향상시키는 실험을 해야 되겠다고 결정하고 본 연구에 착수하였다. 본 연구는 따라서 1982년 I.S.A회의에서 다시 발표하게끔 되어 있다. 본 연구로 얻어진 결과는 다음과 같이 요약할 수 있었다. 1. 수지가공으로 방추성이 나쁜 견직물은 20%정도 향상시킬 수 있었다. 2. 수지가공과 Wash and Wear가공을 단일공정으로 해도 Wash and Wear효과가 있었다. 3. 본래 견직물이 고밀도직으로 되었거나 고연견직일 때는 방추성이 본래 좋아서 수지가공을 해도 수% 밖에 향상되지 못하였다. 4. 견직물조직면으로 볼 때 주자직이나 능직이 평직보다 좋은 방추성을 보였다. 5. 본 연구처리는 염색물의 염색 견뢰도를 향상시키는 효과도 있었다.

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