Article
  • Adhesion Properties and Lightc Shielding Effect by Pigments of UV Curing Acrylic Adhesives
  • Kim DB
  • UV 경화형 아크릴 점착제의 접착특성 및 안료 첨가에 따른 차광 특성
  • 김동복
Abstract
In this study, we would like to describe adhesion property of UV curable acrylic adhesive tapes on various substrates for a display junction such as back light unit and to investigate light shielding property by the amount of inorganic pigment content. When the 180o peel strength of acrylic adhesive tape prepared with various acrylic monomers and acrylic acid (AAC) was examined, the adhesion strength is highest when the 2-ethylhexyl acrylate (2-EHA) was used. When the amount of AAC was changed with 2-EHA, the adhesion strength is highest value at the ratio of 2-EHA:AAC=91:9. As a result of cross-link agent 1,6-hexanediol diacrylate (HDDA), the adhesion strength is highest at the amount of 0.06~0.13 phr, and is decreased with increasing HDDA content. The adhesion strength is increased after 48 h at 80 oC 95% RH and thermal shock. The light shielding property by addition of inorganic pigment showed the 99.9% sheilding effect at 9~12 phr range of pigment content with little difference of adhesion strength. From this study, the UV cured acrylic adhesive tapes for light shielding seems to be a useful for module juction such as a back light unit.

본 연구는 백라이트 유닛과 같은 디스플레이 부품 접합에 사용되는 UV 경화형 아크릴 점착테이프의 다양한 피착재에 대한 점착물성과 무기 안료 함량에 따른 차광 특성을 고찰하였다. 아크릴 점착제에서 acrylic acid(AAC) 함량을 10 wt%로 고정 후 주 단량체의 변화에 따른 점착력 변화를 피착재 별로 고찰한 결과, 2-ethylhexyl acrylate(2-EHA)를 사용한 것이 가장 우수하였다. 또한 AAC 함량을 변화하여 고찰한 결과 2-EHA:AAC=91:9로 감소함에 따라 점착력이 최대임을 확인하였다. 가교제 1,6-hexanediol diacrylate(HDDA) 함량별 결과는 0.06~0.13 phr에서 점착력이 우수하였으며 HDDA 함량이 많아질수록 점착력은 감소하였다. 80 oC 95% RH에서 48시간 경과 후 및 열충격후 점착력이 초기보다 증가하는 특성을 보였다. 안료의 첨가에 따른 차광 효과는 9~12 phr 이상에서 99.9%의 광 차단율을 보였고, 첨가 범위에서 점착력 변화가 적었다. 따라서 본 연구에서 검토한 UV 경화형 차광용 아크릴 점착테이프는 백라이트 유닛과 같은 부품 접합에 유용하게 사용될 수 있을 것으로 판단된다.

Keywords: UV curing; light shielding; adhesive tape; acrylic monomer; substrate

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2016; 40(1): 92-100

    Published online Jan 25, 2016

  • 10.7317/pk.2016.40.1.92
  • Received on Aug 19, 2015
  • Accepted on Sep 24, 2015