Improvement of bleached wheat straw pulp properties by using aspen high-yield pulp.
The bleached wheat straw pulp (BWSP) accounts for about 25% of the virgin fiber supply in the Chinese Pulp and Paper Industry. As a non-wood chemical pulp, BWSP is known to have low bulk, low light scattering coefficient and poor drainage due to its high content of parenchyma cells. In this study, a high-quality aspen high-yield pulp (HYP) was used to improve the BWSP properties at the laboratory scale. The results indicate that adding 5-20% aspen HYP into unrefined or refined BWSP can minimize many of the drawbacks associated with the BWSP: improving its drainage, bulk, light scattering coefficient and opacity. The addition of a small amount (up to 20%) of aspen HYP can also significantly increase the tear index of BWSP with only a slight decrease of the tensile index.
Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, PR China. hongjiezhang1976@hotmail.com
Hongjie
H
Zhang
Jianguo
J
Li
Huiren
H
Hu
Zhibin
Z
He
Yonghao
Y
Ni
D057886:Bleaching Agents / Q000737:chemistry*; D008027:Light; D010209:Paper; D032107:Populus / Q000737:chemistry*; D016062:Porosity; D012542:Scattering, Radiation; D013718:Tensile Strength; D014908:Triticum / Q000737:chemistry*; D014866:Waste Products / Q000032:analysis*
D057886:Bleaching Agents; D014866:Waste Products