자외선 경화형 고경도 PET 필름의 제조 및 특성

Preparation and Properties of UV Curable Hard Coating Materials on PET

  • 김현준 (경기대학교 화학공학과)
  • Kim, Hyunjoon (Department of Chemical Engineering, Kyonggi University)
  • 투고 : 2014.02.19
  • 심사 : 2014.03.20
  • 발행 : 2014.03.31

초록

UV curable transparent hard coating materials have been developed to improve the mechanical and optical properties of PET substrate. The coating materials were synthesized using various urethane acrylate oligomers, monomers, photo initiators, and leveling agents. The materials were coated on PET substrates and UV cured. The hard coated PET films were shown to have the good scratch resistance and transparency. When the urethane acrylate oligomer with more functional groups was introduced into the coating solution, the mechanical and optical properties were improved. However the higher concentration of 9-functional oligomer resulted in the decrease of workability. The addition of trimethylolpropane ethoxylate$(EO/OH)_9$ triacrylate(TMPETA) to coating solution improved the workability and properties. As a result, the UV cured film from the formulation of urethane acrylate oligomer with 9-functional groups, TMPETA as a monomer, IRACURE 754 as a photo initiator and BYK-340 as a leveling agent showed the best mechanical and optical properties in this study.

키워드

참고문헌

  1. Aegerter, M.A. and Al-Dahoudi, N. , "Wet-Chemical Processing of Transparent and Antiglare Conducting ITO Coating on Plastic Substrates" J. Sol-Gel Sci. Technol., Vol. 27, pp. 81-89, 2003. https://doi.org/10.1023/A:1022636112130
  2. Kim, J. and Hong, S., "Influence of ITO Thickness on the Deformation and Cracking Behaviors of ITO/ PET Sheets", Kor. J. Mater. Res., Vol. 19, pp. 1-6, 2009. https://doi.org/10.3740/MRSK.2009.19.1.001
  3. Sepeur, S., Kunze, N., werner, B. and Schmidt, H., "UV Curable Hard Coatings on Plastics" Thin Solid Films, Vol. 351, pp. 216-219, 1999. https://doi.org/10.1016/S0040-6090(99)00339-9
  4. Leterrier, Y., Medico, L., Demarco, F., Manson, J.A.E., Betz, U., Escola, M.F., Olsson, M. and Atammy, F., "Mechanical Integrity of Transparent Conductive Oxide Films for Flexible Polymer-Based Displays", Thin Solid Films, Vol. 460, pp. 156-166, 2004. https://doi.org/10.1016/j.tsf.2004.01.052
  5. Hozumi, A., Kato, Y. and Takai, O., "Two-Layer hard Coatings on Transparent Resin Substrates for Improvement of abrasion Resistance", Surface and coatings Technology, Vol. 82, pp. 16-22, 1996. https://doi.org/10.1016/0257-8972(95)02643-6
  6. Kim, H., Kim, J., Yu, J. and Hong, J., "Experimental Design Approach to Evaluate Chemical Composition Effects of UV Curable Hard Coatings", J. Korean Ind. Eng. Chem., Vol. 12, pp. 287-293, 2001.
  7. Hwang, D.K., Moon, J.H., Shul, Y.G., Jung, K.T., Kim, D.H. and Lee, D.W, "Scratch Resistant and Transparent UV-Protective Coating on Polycarbonate" J. Sol-Gel Sci. Technol., Vol. 26, pp. 783-787, 2003. https://doi.org/10.1023/A:1020774927773
  8. Gilberts, J., Tinnemans, A.H.A, Hogerheide, M.P. and Koster, T.P.M., "UV Curable Hard Transparent Hybrid Coating Materials on Polycarbonate Prepared by the Sol-Gel Method", J. Sol-Gel Sci. Technol., Vol. 11, pp. 153-159, 1998. https://doi.org/10.1023/A:1008693413965
  9. Chen, Z., Wu, L.Y.L., Chaw, E. and Tham, O., "Scratch Resistance of Brittle Thin Films on Compliant Substrates", Mater. Sci. and Eng. A, Vol. 493, pp. 292-298, 2008. https://doi.org/10.1016/j.msea.2007.07.099
  10. Wirasate, S. and Boerio, F.J., " Effect of Adhesion , Film Thickness, and Substrate Hardness on the Scratch Behavior of Poly(carbonate) Films", J. Adhesion, Vol. 81, pp. 509-528, 2005. https://doi.org/10.1080/00218460590944954