• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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• pp.532-532
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• 2007

UV 경화형 ink를 inkjet printing을 통해 PCB에 patterning 하는 방법에 관한 연구이다. UV 경화형 ink는 일반적으로 ink의 투명도, 색깔, 두께에 따라 완전경화가 밀어나지 않을 수도 있는데 본 연구에서 사용한 UV ink는 particle이 첨가되어 있고 후막 인쇄를 목적으로 하기 때문에 완전경화가 어려웠다. 일반적으로 이러한 UV 경화형 ink의 문제점들을 해결하기 위하여 열경화성 첨가제를 일부 첨가하여 UV에 의한 표면경화와 얼에 의한 속 경화를 진행하는 hybrid system이 사용되고 있지만 본 연구는 PCB를 target으로 하기 때문에 열에 약한 PCB 내의 많은 소자들 때문에 열처리가 쉽지 않은 문제가 있다. 이러한 여러 제약적인 환경에서 UV ink의 완전경화를 위해 경화 process를 최적화 하였으며 10~20um의 후막 인쇄에도 ink가 완전 경화하여 연필경도 9H를 확보하는데 성공하였다.

• 펄프종이기술
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• 제46권2호
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• pp.46-56
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• 2014

The aim of this reviews is to introduce the information concerning design of the UV-curable jet ink composition in order to provide a good adhesive property on non-porous surface. In order to clarify the viscosity dependence of flying speed for the UV curable jet ink, rheological analysis and observation of the flying state of the ink were carried out. The relationship between ink formulas and adhesive property on non-porous surface was investigated. It was examined the adhesive property of radical polymerization type UV curable jet ink included hydrogen abstraction type photo-initiator, it was expected that the strong adhesive strength can be obtained between the ink and non-porous surface in this study. UV curable jet ink with a slight amount of water was prepared. Optimum ratio of the cationic polymerization type UV curable jet ink shows an adequate adhesive strength towards two kinds of non-porous surface such as glass, poly(vinyl chloride) when tests were conducted on the ink jet-printing test machine.

• 접착 및 계면
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• 제14권4호
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• pp.167-174
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• 2013

본 연구에서는 ink binder용으로 isophorone diisocyanate (IPDI)/polyether polyol/2-hydroxyethyl acrylate (HEA)계 UV 경화형 우레탄 아크릴레이트를 중합하였다. HEA/PETA 혼합 비율을 달리한 조성물의 UV 조사 시간에 따른 광경화거동을 FT-IR spectrophotometer, probe tack tester 및 Photo-DSC로 확인하였다. UV 조사 시간이 증가함에 따라 전환률 및 gel content는 증가하였으며 probe tack은 감소하였다. 반응성 희석제로 사용한 PETA 함량이 증가함에 따라 저장탄성률, 인장강도 및 초기분해 온도가 증가하였다. HEA/PETA 비율이 30/70인 경우 UV 경화 후 PMMA sheet에 대한 부착특성이 가장 우수하였다.

• 분석과학
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• 제33권3호
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• pp.115-124
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• 2020

마킹펜류는 어린이제품법의 안전확인으로 관리되는 학용품 품목으로서, 폼알데하이드 함유량에 대한 안전기준은 20 mg/kg이다. 시중에 유통되는 마킹펜 9 종을 현행 시험법인 백포 필기 후 증류수 추출액을 UV/Vis 흡광광도계로 분석(이하 Nash-UV/Vis 방법)한 결과 폼알데하이드가 검출되지 않았고 수성 잉크와 같이 항시 추출액이 유색을 띠는 경우 거짓 양성 결과를 보였다. 반면, 잉크를 직접 초음파를 이용하여 용해한 증류수 액을 DNPH 유도체화 한 후 HPLC/DAD로 분석(이하 DNPH-HPLC/DAD 방법)한 결과, 최소 3.2 mg/kg ~ 최고 93.2 mg/kg이었고, 3 종 제품이 안전기준 20 mg/kg을 초과하였다. 따라서, 추출과정이 빠르고 용이하도록 잉크를 직접 증류수에 용해한 후 DNPH-HPLC/DAD 분석 방법으로 잉크 내 폼알데하이드 안전기준 20 mg/kg 이하 여부를 판단할 수 있도록 제안하고자 하며, 이 방법은 Nash-UV/Vis 방법의 검출한계 및 색상 물질 추출 시의 거짓 양성 결과의 한계를 극복할 수 있다. 형광펜, 보드마카, 물백묵, 페인트마카의 잉크 매트릭스를 사용하여 20 mg/kg 및 40 mg/kg의 범위에서 스파이킹 방법으로 산출한 DNPH-HPLC/DAD 분석방법의 정확도 및 정밀도는 각각 90.1 ~ 105.4 % 및 0.6 ~ 3.3 %이다.

• 한국세라믹학회지
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• 제56권5호
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• pp.461-467
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• 2019

Ink-jet printing technology, which utilizes a digitalized design to print fine ink directly on a substrate, has been of interest in various industries due to its high efficiency and adaptability to various materials. Recently, active attempts have been made to apply ceramic materials having excellent heat resistance, light resistance, and chemical resistance to the ink-jet printing process. In this study, ceramic ink was synthesized by combining ceramic pigments with UV curable polymer. 3D printability at various contact angles between ceramic ink and substrate was analyzed in detail. Rheological properties of the synthesized ceramic ink were optimized to meet the requirements of the ink-jet printing process, and the contact angle of UV curable ceramic ink was controlled through surface treatment of the substrate. The potential for additive manufacturing of ceramic material using ink-jet printing was investigated by analyzing the effect of contact angle control on ceramic ink droplets and their 3D printability.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2006년도 PAN PACIFIC CONFERENCE vol.2
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• pp.209-213
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• 2006

Relationship between printability and rheological properties of UV flexographic (flexo) inks were investigated. UV flexo suspensions of carbon black in liquid medium having various binding materials such as acylate pre-polymer, di/multi-functional monomer, and diluents, were used as sample inks. Inks were characterized on a rheometer in terms of steady and dynamic behaviors. To understand the rheological properties of UV flexo inks, we must determine the specific rheological properties of chemical and/or physical interactions of their components (pigments, functional monomers, and pre-polymers). In particular, we discussed the influence of multi-functional monomers and the relationship between the rheological properties and transient networks formed by carbon black. In this study, we investigated the interrelationships between rheological properties of UV flexo inks and chemical and/or physical interactions of their components. To investigate correlations between the printability and the rheological behaviors induced by interfacial interactions between ink compositions, we carried out rheological tests of UV ink suspensions. The results were compared with printing tests so as to find out the relationship between printability and rheological properties of ink.

• Macromolecular Research
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• 제16권2호
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• pp.149-154
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• 2008

UV-curable electrolytes inks were prepared by dissolving [2-[(methacryloyloxy)ethyl]dimethyl]propylaminium bromide (MEPAB), 1,5-[bis(2-methacryloxyethyl)dimethyl ammono]penthane dibromide (MDAPD), hexafunctional reactive oligomer (SP1013), trimethylolpropane triacrylate (TMPTA) and a photoinitiator in methanol/2-methoxyethanol. The compositions of the electrolyte inks were MEPAB/MDAPD/SP1013/TMPTA=6/24/17.2/12.8, 15/15/17.2/12.8 and 24/6/17.2/12.8. Humid-membranes were deposited on a gold electrode/alumina electrode using an ink-jet printer equipped with a UV lamp followed by immediate UV curing. The humidity-sensing characteristics including hysteresis, frequency and temperature dependence, response time and water durability were estimated.

• 한국정밀공학회지
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• 제32권9호
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• pp.781-786
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• 2015

Recently, studies of 3D printing methods have been working in various applications. For example, the powder base method laminates the prints by using a binding or laser sintering method. However, the draw back of this method is that the post process is time consuming and does not allow for parts to be rapidly manufactured. The binding method requires the post process while the time required for the post process is longer than the manufacturing time. This paper proposes a UV curing binding method with an integrated piezo printing head system. The optimization of an arbitrary waveform generation for the control of a UV curable resin droplet was researched, in addition to developed optimized UV curing processes in multi nozzle ink jet heads.

• 한국인쇄학회지
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• 제12권1호
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• pp.69-79
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• 1994

For the vehicle of UV ink formulated with prepolymer and/or reactive diluent, according to change photoinitiator concentration, we measured viscoelasticity of films of bisphenol A diacrylate cured by UV irrdiation, investigated dynamic characteristics and structural changes.

• 월간포장계
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• 통권92호
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• pp.135-137
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• 2000