Investigation of Optical and Mechanical Properties of Bleached Chemi-mechanical Pulps (CMP) with Oxygen, Hydrogen Peroxide and Sodium Dithionite Stages

Vaysi, Ramin; Salimifar, Mohammad Reza

doi:10.22092/ijwpr.2017.105625.1330

Document Type : Research Paper

Authors

¹ Associate Prof., Islamic Azad University of Chalous, Iran

² Graduated in Wood and Paper Technology, Islamic Azad University of Chalous, Iran

https://doi.org/10.22092/ijwpr.2017.105625.1330

Abstract

This study and it aim was accomplished on the effect of TCF bleaching on optical and mechanical properties of CMP pulp. For this purpose, some unbleached CMP pulps were randomly selected from Mazandaran Wood and Paper Industries (MWPI). Then these pulps were bleached with two and three OP, OPY, PY and O(Eo)P bleaching stages by using oxygen(O), alkali extraction with hydrogen peroxide(Eo), sodium dithionite(Y) . The hand sheets with 70 gr/m2 were prepared from above-mentioned of pulps, and then the optical and mechanical properties were measured and compared according by using TAPPI Standard test methods. The results showed that brightness, greenness, folds breaking length, tensile and tear strength were increased and opacity and a* factor were decreased. In general, role of three O(Eo)P stages and two OP and PY bleaching stages were better than P stage and unbleached CMP pulp mill in improve of brightness and its paper strength, too.

Keywords

Main Subjects

Pulp and paper

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Iranian Journal of Wood and Paper Science Research

Investigation of Optical and Mechanical Properties of Bleached Chemi-mechanical Pulps (CMP) with Oxygen, Hydrogen Peroxide and Sodium Dithionite Stages

References

References

Volume 32, Issue 3 - Serial Number 60
September 2017
Pages 311-321

Investigation of Optical and Mechanical Properties of Bleached Chemi-mechanical Pulps (CMP) with Oxygen, Hydrogen Peroxide and Sodium Dithionite Stages

References

References

Volume 32, Issue 3 - Serial Number 60September 2017Pages 311-321

Volume 32, Issue 3 - Serial Number 60
September 2017
Pages 311-321