Effects of Recycling Periods on Physical and Mechanical Properties of CMP and NSSC Pulps

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Abstract

The effect of recycling on physical properties of lignin rich chemimechanical pulp (CMP) and neutral sulfite semi-chemical (NSSC) pulp was evaluated. The pulps were exposed to recycling treatment for three times without any further refining and the fines were conserved. The results indicated that some physical properties like tensile strength, tensile energy adsorption (TEA), burst strength, apparent density and compression strength were decreased by recycling due to hornification followed by loss in fiber flexibility and swelling which give rise to interfiber bonding loss. However the opacity and light scattering coefficient presented gain through recycling. Besides, the bending stiffness, air permeability and roughness increased due to recycling. The observations generally indicated that the CMP and NSSC pulps behavior under recycling is much similar to that of chemical pulp rather than mechanical pulps.

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References

-        Bovin, A. Hartler, N. and Teder, A. 1973. Changes in pulp quality due to repeated papermaking. Paper Technology. 14(5): 261-264.
-        Brancato, A. Walsh, F.L. Sabo, R. and Banergee, S. 2007. Effect of recycling on the properties of papper surfaces. Industrial & Engineering Chemistry Research. 46(26): 9103-9106.
-        Gurnagul, N. Ju, S. and Page, D.H. 2001. Fiber-fiber bond strength of once dried pulp. Journal of  Pulp and  Paper Science. 27(3): 88-91.
-        Hashemi, M. 2010. Recycling potential of chemical pulp fibers from juvenile wood and mature wood of Poplar Deltoides. M.Sc. thesis. University of Tehran. 80 pp.
-        Hern, E. L. 1975. Effect of recycling on properties of waste paper. TAPPI Journal. 68(7): 236-242.
-        Howard, R., and Bichard, W. 1992. The basic effects of recycling on pulp properties. Journal of  Pulp and  Paper Science. 18(4): 151-159.
-        Jin Quan, W.Y. and Wanga, Q. 2010. Effects of hemicellulose removal on cellulose fiber structure and recycling characteristics of eucalyptus pulp. Bioresource Technology. 101: 4577-4583.
-        Kewin, L. Jacques, L. Jinying, V. 1996. Effect of recycling on papermaking and high yield pulps.TAPPI Journal. 79(3): 167-172.
-        Klofta, J. L. and Miler, M. 1994. Effect of deinking on the recycle potential of papermaking fiber. Pulp Paper Canada. 95(8): 41-49.
-        Nazhad, M.M. 2005. Recycled fiber quality. Journal of Industrial and Engineering Chemistry. 11(3): 314-329.
-        Sheikhi, P. Talaeipour, M. Hemasi, A. Eslam, H. Gumuskaya, E. 2010. Effect of drying and chemical treatment of Bagasse soda pulp properties during recycling. Bioresource. 5(3): 1702-1716.
-        Sudarsan, C.N. 1996. Recycling of thermomechanical pulps. M.S. thesis. New York University. 88 pp.
-        Takayuki, O. 2002. The effet if recycling on pulp and paper properties. Japan TAPPI Journal. 56(7): 986-992.
-        Valade, J. L. Law, K. N. Peng, Y. X. 1994. Changes in TMP on recycling. Progress in Paper Recycling. 3(2): 60-67.
-         Wistara, N. Young, R. A. 1999. Properties and treatments of pulps from recycled paper. Part I. Physical and chemical properties of pulps. Cellulose. 6(4): 291-324.
 

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