한국포장학회지 (KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY)

한국포장학회 (Korea Society of Packaging Science and Technology)
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조미김 포장을 위한 PET/PVA-BA/OPP 다층필름 제조 및 특성분석

Preparation and Characterization of PET/PVA-BA/OPP Multi-layer Films for Seasoned-laver Packaging

  • 임미진 (연세대학교 과학기술대학 패키징학과) ;
  • 김도완 (연세대학교 과학기술대학 패키징학과) ;
  • 서종철 (연세대학교 과학기술대학 패키징학과)
  • 투고 : 2016.12.30
  • 심사 : 2017.04.19
  • 발행 : 2017.04.30
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초록

수증기 및 산소에 대한 차단성이 개선된 PVA-BA 코팅 조성액의 포장소재로의 적용가능성을 확인하기 위하여 콤마 코팅과 라미네이션 공정을 이용하여 PET/PVA-BA/OPP 다층필름을 제조하였다. PCT 전 후의 PET/PVA-BA/OPP 다층필름의 기체, 수증기 차단특성 및 인장강도를 확인하였고 이를 PA/PA/EVOH/PP 다층필름의 물성과 비교하였다. PVA내 BA 함량이 증가함에 따라 물성이 증가하는 것을 확인할 수 있었지만, PCT 후 PET/PVA-BA/OPP 다층필름의 산소, 수증기 차단특성 및 인장강도는 감소하는 경향을 보였다. 이는 PVA-BA층 내 증가한 가교밀도와 관련이 있는 것으로 판단된다. 또한, 조미김을 이용한 저장특성분석에서, PET/PVA-BA/OPP다층필름은 PP/Al-metallized PP 다층필름에 비해 조미김의 지방산화를 야기시키는 요인을 효과적으로 억제하는 것으로 판단된다. 하지만, PP/Al-metallized PP 다층필름에 비해 PET/PVA-BA/OPP 다층필름의 상대적으로 높은 수분투과특성 때문에 Aw에 큰 장점을 확인하지 못하였다. 따라서, 물성 극대화 및 포장소재로 적용을 위해서는 PET/PVA-BA/OPP 다층필름 내 수분 차단성 향상에 대한 추가적인 연구가 필요하다는 것을 확인하였다.

To identify applicability for packaging material of polyvinyl alcohol (PVA)/boric acid (BA) coating solution with highly-enhanced water vapor and oxygen barrier properties, the PET/PVA-BA/OPP multi-layer films were prepared through comma coating and lamination process. The oxygen and water vapor permeabilities, and tensile strength of as-prepared multi-layer films were investigated before and after pressure cooker test (PCT). Although oxygen and water vapor permeabilites, and mechanical properties of PET/PVA-BA/OPP multi-layer films was decreased after PCT, their properties were highly enhanced as increase of BA contents in PVA matrix. This is strongly related with enhanced cross-linking density in PVA-BA layer. In storage test of seasoned-laver, the PET/PVA-BA/OPP multi-layer films were comparatively effective to suppress the increase in peroxide value originating from oxidation of seasoned-laver. Comparing the commercially available PP/Al-metallized PP for seasoned-laver packaging, however, PET/PVA-BA/OPP multi-layer films did not show any advantage in water activity. This is due to higher water vapor permeation properties of as-prepared multi-layer films. Therefore, further studies are required to enhance the water vapor permeation in PET/PVA-BA/OPP multi-layer films.

키워드

참고문헌

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피인용 문헌

  1. ATR FT-IR과 pyro-GC/MS를 이용한 다층박막필름의 분석 vol.20, pp.3, 2017, https://doi.org/10.17702/jai.2019.20.3.102
  2. 붕장어(Conger myriaster) 시즈닝을 활용한 조미김(Pyropia yezoensis)의 제조공정 최적화 vol.53, pp.3, 2017, https://doi.org/10.5657/kfas.2020.0368