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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A New Test Method to Evaluate Potential White Pitch Deposit - Influence of pH and calcium hardness -

백색 점착성 이물질을 측정하기 위한 새로운 시험법 - pH와 칼슘경도의 영향 -

  • Shin, Eun-Ju (Dept. of Wood and Paper Science, Chungbuk National University) ;
  • Choi, Tae-Ho (Dept. of Wood and Paper Science, Chungbuk National University) ;
  • Song, Bong-Keun (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Cho, Byoung-Uk (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Ryu, Jeong-Yong (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology (KRICT))
  • 신은주 (충북대학교 목재 종이과학과) ;
  • 최태호 (충북대학교 목재 종이과학과) ;
  • 송봉근 (한국화학연구원, 산업바이오화학연구센터) ;
  • 조병욱 (한국화학연구원, 산업바이오화학연구센터) ;
  • 류정용 (한국화학연구원, 산업바이오화학연구센터)
  • Published : 2009.06.30
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Abstract

A new testing method to evaluate the deposition potential of white pitch was developed. The new method involves depositing the potential white pitch particles on the air bubble covered plastic film in the pitch deposit tester (PDT) developed by KRICT and analysing the deposited area of white pitch using an image analyzer. In addition, the effect of two important factors (pH and calcium hardness) on white pitch deposition potential was elucidated. When pH of the coated broke stock was increased from neutral to alkali or the calcium hardness of the stock was decreased, the pitch deposit area was decreased, implying that these two factors have to be controlled during the evaluation of pitch deposition potential. It was found that hydrophobicity of the surface of latex binding films repulped is a key factor influencing white pitch deposition.

Keywords

References

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