Improving the properties of Populus alba CMP pulp by using MOW deinked pulp

Deinked pulp of mixed office waste was used to improve different properties of CMP made by Populus alba species. CMP pulp and DIP of mixed office waste (MOW) were produced according to the industrial standard (Mazandaran Wood and Paper Industry) and flotation, respectively. The pulps were refined to reach 300 ml.csf, after which hand sheet were produced as mixed with imported long fibers and their physical, mechanical and optical properties were measured. Results showed that by increasing DIP of mixed office waste (MOW) content in blended pulps, optical paper properties improved but strength properties slightly decreased. Ranking of treatment based on normalization calculations showed that papers with 80% Populus alba CMP, 15% deinked pulp and 5 imported long fiber had the highest rank and on the other hand the best condition in paper properties. However using 15% DIP of mixed office waste blended with CMP pulp of Populus alba and little content of imported long fiber resulted to produce suitable newsprint.