Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference (한국펄프종이공학회:학술대회논문집)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Analysis of brightness decrease originated from mixing of flexo printed ONP and OCC in ONP recycling process

플렉소 인쇄 신문지와 OCC 배합에 따른 ONP 탈묵펄프의 백색도 변화

  • Ryu, Jeong-Yong (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Song, Bong-Keun (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology (KRICT))
  • 류정용 (한국화학연구원, 산업바이오화학연구센터) ;
  • 송봉근 (한국화학연구원, 산업바이오화학연구센터)
  • Published : 2011.10.20
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Abstract

The application of flexo printed ONP and OCC leads to brightness decrease of deinked stock in ONP recycling system. The largest problems are due to accumulation of flexo ink & introduction of brown fibers. All these are emphasized by variations in the amount of flexo printed ONP and OCC in recovered ONP stock. Most of the brightness problems caused by flexo ink can be helped and solved by applying a proper polyelectrolytes as coagulation agent and flocculation agent. This requires exact evaluation of sedimentation or dissolved air flotation potentials of flexo ink and polyelectrolytes. Effect of bleaching chemical (H2O2) addition level on the increase of brightness of OCC included stock has been investigated by lab scale test.

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