• 접착 및 계면
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• 제4권1호
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• pp.9-17
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• 2003

오늘날 산업에서는 환경오염의 줄이고 에너지 절약에 기여할 수 있다는 이유에서 용매를 사용하지 않는 UV 하드코팅재료의 개발이 점차로 많은 주의를 끌고 있다. 본 연구는 실질적으로 산업에 이용될 수 있는 실리콘아크릴레이트(SAOC)를 포함하고 있는 UV 경화코팅제를 개발하고자 수행되었다. 실험의 결과, 수지조성물 중 SAOC의 형태나 농도가 UV 경화필름의 여러 가지 물성에 영향을 주었다. SAOC가 수지조성물에 도입되었을 때 경화된 필름의 물성은 SAOC가 함유되지 않은 도막과 비교하여 개선되었다. 특히, UV 하드 코팅의 내화학성, 내마모성, 내후성과 같은 성질들은 향상되었으며, 코팅된 폴리카보네이트 기재의 충격특성은 코팅되지 않은 PC에 비해 개선되었다. 30 wt% SAOC를 함유하고 있는 경화필름이 가장 좋은 물성을 나타내었다.

• 한국산학기술학회논문지
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• 제11권5호
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• pp.1773-1777
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• 2010

광경화(UV-curing)에 의한 PVC 바닥상재 코팅기술은 PVC 바닥상재 질의 개선을 위하여 사용되는 것이다. 본 연구에서 사용한 폴리우레탄 아크릴레이트 수지는 반응성 모노머, 광개시제, 그 외 첨가제를 배합하여 제조하였고, 올리고머는 상용화된 지방족 우레탄 아크릴레이트를 사용하였다. 제조한 코팅액을 바코팅(bar-coating) 방법으로 PVC 바닥상재에 코팅한 후 광경화법을 이용하여 상재표면에 코팅층을 형성하였다. 코팅에 사용된 코팅액은 FTIR로 측정하여 특성을 확인하였으며, PVC 상재 표면에 형성된 코팅층의 물성은 광택과 부착력으로 평가하였다. 코팅층의 물성은 코팅조성과 공정조건에 영향을 받았다.

• 한국염색가공학회지
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• 제20권2호
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• pp.66-74
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• 2008

Effect of disperse dyeing on flame retardant finishing of PET fabrics via UV curing using three UV curable phosphorous-containing methacrylates and ammonium polyphosphate(APP) was investigated. The dye fixation and flame retardancy of PET fabrics did not change significantly with excellent durability to five laundering cycles irrespective of the dyeing and finishing sequence. However, the flame retardancy of Pekoflam-treated fabrics was lower than that of the UV treated and decreased substantially when heat treatment was carried out before the dyeing. The dyeability of the flame-retardant PET fabrics was not affected in the case of UV curing of the methacrylates alone. However, UV finishing after the dyeing caused significant decrease in K/S and ${\Delta}E$ due to changed refraction and inherent color of surface coating of the UV curable monomers and APP. Whereas the heat treatment with Pekoflam decreased both color fastness to laundering and sublimation, surprisingly the UV finish of PET fabrics before and after the dyeing increased the color fastness probably resulting from the presence of photopolymerized surface layer on the fabrics.

• 한국인쇄학회지
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• 제25권1호
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• pp.95-107
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• 2007

This study starts to find a way out, experiment and apply commercial UV coatings to the cap closures. The cap closures is made form coating and succeeding deformation process. It is coated with several printing layers, printing and over print varnish coating. Then it pressed in three steps of press called 'deep-drawing'. In this study, two kinds of coating was designed and accomplished in the base of the same manufacturing and environment conditions. Consequently, UV curable ink have adequate performance in this experiment (T-bending, Erichsen Test), but it were experienced several damages in this experiments (web-bending, impact test). They were not cured enough to endure the friction and a unique shape of serial cracks were appeared.

• 한국염색가공학회지
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• 제19권5호
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• pp.1-7
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• 2007

A new UV-curable coating was carried out to impart the flame-retardant property to cotton fabric using Bis[2-(methacryloyloxy)ehtyl]phosphate(DMEP) and 2-hydroxy-2-methyl-1-phenyl-propan-l-one(HMPP) as a UV-curable monomer and a photoinitiator, respectively. The cotton fabrics were applied with various amounts of DMEP and HMPP via padding and UV irradiation, and the optimal concentrations of DMEP and HMPP in the formulation were 40%(w/w) and 7%omp respectively. A limiteed oxygen index(LOI) up to 28.9 was obtained for the UV-cured fabric, which may occur through a condensed phase mechanism as verified by the increased residue number with increased application level. The characterization of the UV-cured coating was made by IR analysis, thermo-gravimetric analysis, LOI test, and scanning electron microscopy.

• 한국정밀공학회지
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• 제31권10호
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• pp.873-879
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• 2014

UV curable adhesives with different acrylic functionalities were synthesized for temporary bonding and debonding process in 3D multi-chip packaging process. The aim is to study various factors which have an influence on UV curing. The properties and curing behaviors were investigated by gel fraction, peel strength, probe tack, and shear adhesion failure temperature. The results show that the properties and curing behaviors are dependent on not only acrylic functionalities of binders but also UV doses and coating thickness.

• Korean Chemical Engineering Research
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• 제59권2호
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• pp.165-173
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• 2021

눈부심 방지(Anti-glare, AG) 코팅 필름은 액정 디스플레이, LED 조명, 터치 패널 등 다양한 디스플레이 분야에 적용되고 있다. 본 연구에서는 UV 경화형 코팅 용액 내에 충전제로써 마이크로미터 크기의 실리카 입자를 첨가하여 눈부심 방지 효과를 부여하고자 하였다. 이 과정 중 실리카 입자의 크기, 함유량, 교반 시간, 다른 크기의 실리카 입자의 혼합 비율이 코팅 도막의 haze 값과 가시광선 투과도에 미치는 영향을 조사하였다. 그 결과 실리카 입자의 크기가 클수록, 또한 실리카 입자의 함유량이 증가할수록 haze 값은 증가하나, 가시광선 투과도는 감소하였다. 반면 교반 시간은 haze 값과 투과도에 큰 영향을 주지 못하였다. 또한 큰 크기의 실리카의 혼합 비율이 증가할수록 haze 값은 증가하나, 이와 반대로 가시광선 투과도는 감소하는 것을 확인할 수 있었다.

• 한국응용과학기술학회지
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• 제26권4호
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• pp.467-472
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• 2009

Ultraviolet curable coating solution was prepared with poly(ethylene glycol) acrylate oligomer and various mono and multi-functional acrylate monomers. The optical properties of UV cured coating layer on PET film with acrylate coating solution containing metal oxides, such as fumed silica and alumina, were also investigated to reduce light reflection on films. Poly(ethylene glycol) diacrylate which has 575 of average molecular weight was used as oligomer acrylate, and pentaerythritol triacrylate and dipentaerythritolpenta-/hexa acrylate were used as multi-functional acrylate monomers. Also, butyl acrylate was used to improve the adhesion as well as to reduce glass transition temperature to give a better flexability. 1-hydroxy cyclohexyl phenyl ketone was used as photoinitiator. We found out the metal oxides in acrylate coating solution showed a homogeneous dispersion from energy dispersive spectroscopy data. Transmittance and light reflection of coated PET film was measured with UV/vis spectrometer and gloss meter, respectively. When 1.00 g of both metal oxides was added into coating solution, the transmittance and the glossiness were reduced from 90% to 30% and from 190 GU to 35 GU, respectively. However, adding up to 1.00 g of the metal oxide into coating solution did not affect on the hardness of coating layer and adhesion between coated layer and PET film. Conclusively, we can control transmittance and light reflection of coated film by adjusting the amounts of metal oxide in coating solution.

• 한국염색가공학회지
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• 제22권3호
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• pp.239-245
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• 2010

Breathable waterproof PET fabrics were prepared by the UV coating of UV-curable polyurethaneacrylate(PUA) formulation mixed with polyethyleneglycol(PEG) as a water soluble pore former. The dispersed PEG in the UV-cured coating was extracted by warm water, which can generate individual circular pores uniformly distributed all over the coating instead of pore channels. Accordingly the moisture permeability of the microporously coated fabrics increased substantially with increasing PEG addition without significant reduction of hydrostatic pressure. Also the silicone diacrylate addition in the formulation was beneficial in increasing the hydrostatic pressure. The UV-based microporous coating can be an alternative to conventional thermal curing of solventborne polyurethane coating owing to the enhanced environment friendliness and energy saving.

• 공업화학
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• 제28권6호
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• pp.626-631
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• 2017

투명 플라스틱 소재를 광학용으로 적용하기 위해서는 표면경도 및 내열성과 같은 물성의 개선이 필요하다. 본 연구에서는 이러한 물성의 개선을 위하여 자외선 경화형 유기/무기 하이브리드를 합성하였다. 유기소재 안에 무기 성분이 균일하게 최적상태로 분산되도록 하기 위하여 졸-겔 반응을 기초로 하여 동시에 반응이 진행되도록 하였다. 이러한 졸-겔 반응과 빠른 자외선 경화반응을 적절히 조합하여 우레탄 아크릴레이트 유기소재 안에 무기 성분의 분산성이 향상되도록 하여 투명성이 우수한 코팅층을 형성시킬 수 있었다. 자외선 경화형 유기/무기 하이브리드의 경화도와 코팅 물성을 변화시키기 위하여 다양한 종류의 알콕시 실란을 사용하였다. 이러한 자외선 경화형 유기/무기 하이브리드 코팅에서의 무기 성분의 함량에 따라 표면 경도와 내열성을 조절할 수 있었다.