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Paper Information

Journal:   IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH   FALL 2017 , Volume 32 , Number 3 (60) ; Page(s) 311 To 321.

Investigation on optical and mechanical properties of oxygen, hydrogen peroxide and sodium dithionite bleached chemi-mechanical pulps (CMP)

Author(s):  VAYSI R.*, Salimifard M.R.
* Chalous Azad University, Chalous, Iran
This study investigate the effect of TCF bleaching on optical and mechanical properties of CMP pulp. Some unbleached CMP pulps were randomly selected from Mazandaran Wood and Paper Industries (MWPI). Then these pulps were bleached with two and three stage OP, OPY, PY and O(Eo)P bleaching sequences using oxygen(O), alkali extraction with oxygen (Eo), sodium dithionite(Y). Hand sheets were prepared from bleahed pulps with 70 gr/m2 basis weight and then the optical and mechanical properties were measured according to TAPPI Standard test methods and compared. The results showed that brightness, greenness, fold, tensile and tear strength were increased and opacity and a* factor were decreased. In general, the impact three stage O(Eo)P and two OP and PY bleaching sequences were more effective than P stage in improving the brightness and paper strength.
Keyword(s): CMP pulp,hydrogen peroxide,oxygen,TCF bleaching,optical and mechanical properties
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