Investigation and Comparison of Newsprint Properties from Bleached CMP Pulp of Ash and Orange Woods

Vaysi, Ramin; Nikkar, Mohammad; Salarian, Hamidreza

doi:10.22092/ijwpr.2016.106287

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.2016.106287

Abstract

In this study, the possibility of using ash and orange bleached CMP pulp as replace in the full or part of CMP pulp of Mazandaran Wood and Paper Industries (MWPI) for making newsprint was investigated. For this purpose, first, ash and orange CMP pulps were prepared by using cooking conditions of MWPI with 101 gr/lit Na2O at the yield 85% in 75 minutes. Then some of the CMP pulps bleached with hydrogen peroxide, then its mixed samples with 15, 30, 45 and 60 percent to CMP pulp mill (control sample). From the mixed pulps provided hand sheets with 60 gr/m2 and these optical and mechanical properties measured and the data average were analyzed and compared. The results showed that newsprint from ash CMP pulp were more suitable than CMP pulp mill in all measured properties (except brightness) and orange CMP pulp (except opacity). Following bleaching with hydrogen peroxide, the brightness, tear, burst, tensile and breaking length strengths increased and opacity decreased. The results showed that ash and orange unbleached CMP pulps are not good properties for newsprint production and these pulps have to bleach with hydrogen peroxide. In generally, the best mixed pulps were includes 45-60 percent ash and orange bleached CMP pulps with 40-55 percent MWPI CMP pulp for newsprint production.

Keywords

Main Subjects

Pulp and paper

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Iranian Journal of Wood and Paper Science Research

Investigation and Comparison of Newsprint Properties from Bleached CMP Pulp of Ash and Orange Woods

References

References

Volume 31, Issue 4 - Serial Number 57
January 2017
Pages 569-580

Investigation and Comparison of Newsprint Properties from Bleached CMP Pulp of Ash and Orange Woods

References

References

Volume 31, Issue 4 - Serial Number 57January 2017Pages 569-580

Volume 31, Issue 4 - Serial Number 57
January 2017
Pages 569-580