Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Molecular Diffusion of Water in Paper( I )-Steady-State Diffusion Experiment for the Evaluation of Water Vapor-proof Properties of Paper-

종이내 수분확산(제1보)-종이의 방습성 평가를 위한 수증기의 정류상 확산 실험-

  • Yoon, Sung-Hoon (Dept. of Forest Product, College of Agriculture, Chungnam National University) ;
  • Jeon, Yang (Dept. of Forest Product, College of Agriculture, Chungnam National University) ;
  • Ow, Say-Kyoun (Division of Pulp and Paper Research Center, Korea Research Institute of Chemical Technology) ;
  • Seo, Yung-Bum (Dept. of Forest Product, College of Agriculture, Chungnam National University)
  • 윤성훈 (충남대학교 농과대학 임산공학과) ;
  • 전양 (충남대학교 농과대학 임산공학과) ;
  • 오세균 (한국화학연구소 응용화학 사업단 펄프제지연구센터) ;
  • 서영범 (충남대학교 농과대학 임산공학과)
  • Published : 1998.03.01
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Abstract

A steady-state molecular diffusion experiment was conducted to evaluate the water vapor proof properties of paper Handsheets prepared from unbleached Itraft pulps(UKP) and old newspapers(ONP) and four different types of polymer-laminated white duplex board were tested under appropriate standard conditions. The diffusivity was determined on the basis of the Fickean first law. Results obtained from this study can be summarized as follows ; 1. The diffusivity data for handsheets showed about $10^{-5}cm^2/min$. whereas polymer-laminated paperboards had remarkably improved water-vapor resistance with about $10^3 to 10^4$ times lower diffusivity : 2. Sheet basis weight, wet-swelling and sizing degree had little influence on the diffusivity of paper; 3 Linear relationship existed between sheet density and diffusivity, and, 4. Highly sfgnificant linear relationship could be observed between diffusivity and Darcy s gas permeability. Results indicate that diffusivity, an intrinsic property of paper, can provide a valuable information for precise evaluation and improved quality control of water-vapor proof properties of paper.

Keywords

References

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