• Title, Summary, Keyword: printing ink solvents

Search Result 27, Processing Time 0.032 seconds

Investigation of Dispersion Stability of Conductive Nano Ink Using 1-Octanethiol Coated Copper Nano Powders (1-Octanethiol이 코팅된 나노 구리 분말을 이용한 나노 잉크의 분산도에 대한 연구)

  • Cho, Danee;Baik, Jong-Hwan;Park, Joong-Hark;Lee, Caroline Sunyong
    • Journal of the Korean Ceramic Society
    • /
    • v.49 no.5
    • /
    • pp.417-422
    • /
    • 2012
  • Copper nano particles have been considered as the materials for conductive ink due to its good thermal, electrical conductivity and low cost. However, copper nanoparticles oxidize easily, decreasing dispersion stability and electrical conductivity. Therefore, it is important to develop a method to minimize oxidation of copper nano particles to improve its dispersion stability property in copper nano ink. In this study, copper nano particles were coated with 1-Octanethiol VSAM(Vaporized Self Assembled Multilayers) to prevent oxidation and coated copper powders were dispersed in conductive ink successfully by studying its relationship of different chain length of solvents to 1-Octanethiol coating layer to fabricate nano ink. Various alcohol solvents, such as 1-Hexanol, 1-Octanol, and 1-Decanol were used. The coating layer was observed using FESEM and TEM. Furthermore, dispersion of copper nano particles in nano inks, was characterized using Turbiscan analyzer, viscometer, and contact angle measurement tool.

Study on the Cleaning Screen Printing using Alternative Cleaning Solvent of 1,1,1-TCE, CFC-113 (1,1,1-TCE, CFC-113 대체세정제를 이용한 스크린인쇄 세정연구)

  • Lee, Ki-Chang;Yoon, Cheol-Hun;Hwang, Sung-Kwy;Oh, Se-Young;Lee, Seok-Woo;Ryu, Jung-Wok
    • Journal of the Korean Applied Science and Technology
    • /
    • v.14 no.2
    • /
    • pp.115-122
    • /
    • 1997
  • The field of printing use to pressurization ink using screen gassamer that is called screen printing. Existing cleaning solvent using screen printing are the organic solvents including aromatic compounds carried with poisonous and stench. Besides, cleaning method of current screen printing are for the most part mixed cleaning method of dipping and polish. Using 1,1,1-TCE, CFC-113 alternative system cleaning solvent be substituted for existing cleaning solvent against screen printing ink measured the cleaning efficiency according to gravimetric analysis method and property change of gassamer according to Image Analyzer. Also, Cleaning process system carry with excellent cleaning efficiency studied which was proposed new cleaning process including ultrasonic and vibration cleaning process be substituted for existing mixed cleaning method of dipping and polish.

Reviews About food Safety on Packaging Materials and Printing Ink Solvent (식품용 포장제와 인쇄 용제의 안정성에 관한 연구)

  • An, Duek-Jun;Kim, Youn-Uck;Park, Hoon
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
    • /
    • v.12 no.2
    • /
    • pp.91-96
    • /
    • 2006
  • The widespread use of packaging materials on food packages sometimes causes off-flavor and deterioration in the food by migration of packaging materials which consist of mainly plastic materials and printing ink solvents. Even though migration of the residual packaging materials does not generally cause safety problems in the contained food, it certainly can generate off-flavor and finally deteriorate quality of the finished product. In highly consumer-oriented markets, quality of the finished product is gaining more importance economically, so profound and thorough study about migration into food to maintain the fine quality of the end product becomes an importance issue. Studies have been conducted about migration of various packaging materials and the chemical reactions between the food components and the materials used for food packaging (Brody, 1989; Mcneal and Breder, 1987; Lawson, G and Lawson, C, 1996). Several of these studies have measured partition coefficient values (Kp) between packaging materials and various food samples and involved finding factors that affected the partitioning behavior of packaging materials into the contained food. However, to enable prediction of partitioning, data are still needed on the relation of packaging material chemical structure and properties to partitioning behavior, and on the partitioning behavior of various food ingredients and the total food compositions.

  • PDF

Organic TFTs using PVP Bank and TIPS-Pentacene Semiconductor Layer patterned by Ink Jet Printing (잉크젯 방식으로 PVP 뱅크와 TIPS-펜타센 반도체 층을 제작한 유기 박막트랜지스터)

  • Kim, Se-Min;Park, Jong-Seung;Song, Chung-Kun
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.22 no.11
    • /
    • pp.992-998
    • /
    • 2009
  • We investigated the influence of organic solvents on the droplet properties of 6,13-bis (triisopropylsilylethynyl) pentacene (TIPS-pentacene), which was used for semiconductor of organic thin film transistors (OTFTs) and deposited by ink jet printing. From the result of the investigation, the conditions of a suitable solvent is that boiling point should be above $200^{\circ}C$ to reduce coffee stain and the surface tension above 32 dyn/cm to decrease the droplet size. Consequently, we selected tetralin which have a high boiling point ($207^{\circ}C$) and high surface tension (34.3 dyn/cm) as the solvent for TIPS-pentacene, and applied it to OTFTs. In fabrication process the conventional bank process employing photolithography and etching process was replaced by ink jet printed bank process, resulting in simplifying the process. Especially, polyvinylphenol was used for the bank, and the high hydrophobicity could improve the confinement of TIPS molecules inside the bank, enhancing the performance over the conventional hydrophilic polyvinylalcohol bank. The mobility was $0.18\;cm^2/Vs$, current on/off ratio $2.09{\times}10^5$, subthreshold slope 0.42 V/dec, and off state current $0.049\;pA/{\mu}m$.

Effect of Marangoni flow on Surface Roughness and Packing Density of Inkjet-printed Alumina Film by Modulating Ink Solvent Composition

  • Jang, Hun-Woo;Kim, Ji-Hoon;Kim, Hyo-Tae;Yoon, Young-Joon;Kim, Jong-Hee;Hwang, Hae-Jin
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • /
    • pp.99-99
    • /
    • 2009
  • Two different micro-flows during the evaporation of ink droplets were achieved by engineering both surface tension gradient and compositional gradient across the ink droplet: (1) Coffee-ring generating flow resulting from the outward flow inside the ink droplet & (2) Marangoni flow leading to the circulation flow inside the ink droplet. The surface tension gradient and the compositional gradient in the ink droplets were tailored by mixing two different solvents with difference surface tension and boiling point. In order to create the coffee-ring generating flow (outward flow), a single-solvent system using N,N-dimethylformamide with nano-sized spherical alumina particles was formulated, Marangoni flow (circulation flow) was created in the ink droplets by combining N,N-dimethylformamide and fotmamide with the spherical alumina powders as a co-solvent ink system. We have investigated the effect of these two different flows on the formation of ceramic films by inkjet printing method, The packing density of the ceramic films printed with two different ink systems (single- and co-solvent systems) and their surface roughness were characterized. The dielectric properties of these inkjet-printed ceramic films such as dielectric constant and dissipation factor were also studied in order to evaluate the feasibility of their application to the electronic ceramic package substrate.

  • PDF

Effect of Structure Change of Chocolate on Migration Behavior between Chocolate and Packaging Printing Solvent (쵸코렛의 구조 변화가 포장재 인쇄 용매의 전이에 미치는 영향)

  • An, Duek-Jun;Jang, Hean-Su;Jeong, Ji-Hwan;Lee, Jin-Seong;Han, Sang-Bin;Do, Se-Ho
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
    • /
    • v.25 no.2
    • /
    • pp.47-50
    • /
    • 2019
  • Migration behavior of printing ink solvents on three types of chocolates with different fat content and fat compositions (different crystallinity) was investigated. Even though chocolate cream (29%) has lower fat content (29%) than that of chips (48%), it showed higher degree of migration. However, with increasing temperature, degree of migration was depended on mainly fat content. This result indicated that degree of migration was mainly affected by crystallinity at below melting point of chocolate, but the effect was diminshed as the temperature was close to melting temperature.

The Evaluation of the Preparation and Characterization of Inks based on Surface-modified Specialty Carbon Black(SCB) (표면개질 스페셜티 카본블랙의 제조 및 잉크 특성 평가)

  • Park, Dong Jun;Kim, Song Hui;Park, Soo Youl
    • Textile Coloration and Finishing
    • /
    • v.30 no.3
    • /
    • pp.168-179
    • /
    • 2018
  • The modified surface of specialty carbon black(SCB) is one of the main technical factors for producing a uniform color and stable dispersion. In this work, the carboxylation or sulfonation process of SCB was used to improve the dispersive properties of hydrophilic solvents such as 1,6-hexanediol and propylene glycol monomethyl ether acetate(PGMEA). The results showed that the color strength of SCB DC2500G changed little with a range of 0.128~0.941(${\Delta}E$) compared to other SCB DC2500G material. In contrast, in the case of SCB EG410, there was a uniform color value with a range of 0.144~0.252(${\Delta}E$). Also, in our experiments, a modified SCB was confirmed by printing ink material as a melt coating paper. It may be possible that the SCB EG410 material can be advantageous as a gravure ink product. Finally, the modified SCB obtained from this research will have a large impact on the industry as a potential material for toners, paint, rubber, fillers, and other carbon black additives.