폴리에스터 필름의 광투과도 향상에 대한 연구

김시민; 박수영; Si-Min Kim; Soo-Young Park

Polymer(Korea), Vol.36, No.5, 662-667, September, 2012

Export Citation

폴리에스터 필름의 광투과도 향상에 대한 연구

Study on the Improvement of Light Transmittance of Polyester Film

김시민^{1, 2}, 박수영 ^{2, †}

¹코오롱인더스트리
²경북대학교 고분자공학과

Si-Min Kim^{1, 2}, and Soo-Young Park^{2, †}

¹KOLON INDUSTRIES, 212 Gongdan-dong, Gumi-si, Gyungsangbuk-do 730-030, Korea
²Department of Polymer Science, Kyungpook National University, 1370 Sangyuk-dong, Buk-gu, Daegu 702-701, Korea

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초록

평판 디스플레이에 사용되는 PET 필름의 광학적 특성을 알아보기 위하여 필름 표면 굴절률, 필름 표면조도 및 필름 내부입자가 광투과율에 미치는 영향을 알아 보았다. 필름표면에 굴절률이 낮은 코팅층을 형성함에 따라 필름의 광투과율이 향상되었고, 최대의 광투과율을 가지는 코팅두께가 있음을 확인하였다. 표면 거칠기의 영향에 대해서는 표면조도를 나타내는 Ra를 입사 파장의 1/4 이하로 조절한 경우 광손실이 발생되지 않았다. 필름 내 무기입자는 입사된 광의 흡수 및 산란을 발생시켜 광손실을 증가시켰다.

Poly(ethylene terephthalate) (PET) base films with high light transmittance have been used for the substrate of various functional films in the flat panel display. The effects of the reflective index of coated films, the roughness of the film surface and the content of inorganic silica particles on the light transmittance were studied in this article. Light transmittance was increased by coating a water soluble resin with a low reflective index at an optimum thickness. The roughness of the film did not affect light transmittance when the Ra of the film surface was less than a quarter of the wavelength of incident light. Inorganic silica particles decreased light transmittance due to their absorbance and scattering of the incident light.

Keywords:polyester film;light transmittance;refractive index;surface morphology;inorganic particle.

[References]

Yamada T, Optimization and Troubleshooting of Processing and Stretching of Film, Technical Information Institute, Tokyo (2007)
Yuki K, Saturated Polyester Resin Handbook, Nikkan Kokgyo Shinbun, Tokyo (1989)
Mitsuishi Y, PET Film, Technical Information Institute, Tokyo (1990)
Kim JH, Lee DS, Park TS, Kim J, Kim KU, Polym.(Korea), 19(3), 353 (1995)
Park SS, Im SS, Kim DK, Polym.(Korea), 17(3), 324 (1993)
Park SS, Im SS, Kim DK, Polym.(Korea), 17(2), 212 (1993)
Iwamori S, Noda K, Mater. Lett., 66, 349 (2012)
Kum BG, Park YC, Chang YJ, Jeon JY, Jang HM, Thin Solid Films, 519(11), 3778 (2011)
Ideo F, The Optical Films for Flat Panel Displays, CMC Press, Tokyo (2004)
Jurgen R, Arendt M, Introduction to Classical and Modern Optics, Prentice-Hall, New Jersey (1995)
Yoon JS, Basic Optics, Dasung Press, Seoul (2002)
Hecht E, Optics, 4th edition, Addison Wesley Longman, Boston (2002)

[Related Articles]

[1] Yamada T, Optimization and Troubleshooting of Processing and Stretching of Film, Technical Information Institute, Tokyo (2007)

[2] Yuki K, Saturated Polyester Resin Handbook, Nikkan Kokgyo Shinbun, Tokyo (1989)

[3] Mitsuishi Y, PET Film, Technical Information Institute, Tokyo (1990)

[4] Kim JH, Lee DS, Park TS, Kim J, Kim KU, Polym.(Korea), 19(3), 353 (1995)

[5] Park SS, Im SS, Kim DK, Polym.(Korea), 17(3), 324 (1993)

[6] Park SS, Im SS, Kim DK, Polym.(Korea), 17(2), 212 (1993)

[7] Iwamori S, Noda K, Mater. Lett., 66, 349 (2012)

[8] Kum BG, Park YC, Chang YJ, Jeon JY, Jang HM, Thin Solid Films, 519(11), 3778 (2011)

[9] Ideo F, The Optical Films for Flat Panel Displays, CMC Press, Tokyo (2004)

[10] Jurgen R, Arendt M, Introduction to Classical and Modern Optics, Prentice-Hall, New Jersey (1995)

[11] Yoon JS, Basic Optics, Dasung Press, Seoul (2002)

[12] Hecht E, Optics, 4th edition, Addison Wesley Longman, Boston (2002)