Investigation of the CMP Pulp Yield Variations on Its Strength and Optical Properties

Document Type : Research Paper

Abstract

In this research, the chemimechanical pulps (CMP) with different yields were prepared by using the mixtures of constant raw materials comprising Iranian hardwood species such as hornbeam (44%), poplar (31%), maple (15%) and salix (10%). This research was aiming to study CMP pulp properties variations in yields lower than standard limit (85%). Four different yields (84, 80, 73 and 67%) were achieved by changing the cooking parameters including temperature, time and cooking liquor consumption ratio,. Freeness of the pulp, strength and optical properties of the 60 g/m2 handsheets were measured. . The results showed that the initial freeness was reduced with 17 unit reduction in CMP pulp yield, while all strength properties including tear, burst and tensile indices were increased to 42, 100 and 29 percent, respectively. The Brightness and opacity of the obtained pulp was reduced with reduction of yields and with 17 unit reduction in CMP pulp yield (from 84 to 67 percent), the brightness about nine percent and the opacity less than one percent were decreased.

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References

[1]. Smook, G. A. (2003). Handbook of Pulp and Paper Technologists, Translated by Mirshokraei, S. A., Aeij Press, Tehran,501p.
[2]. Beatson, R., Heitnet, C., and Atack, D., (1984). Factors affecting the sulphonation of spruce. Journal of Pulp and Paper Science, 10(1): 12-17
[3]. Sixta, H. (2006). Handbook of Pulp. Lenzing, Austria,1352p.
[4]. Gullichsen, S., and Paula Puro, H. (1998). Mechanical Pulping. Helsinki, Finland,427p.
[5]. Holik, H. (2006). Handbook of Paper and Board, Willey-Vch Verlag gmbh, Weinheim, Germany,505p.
[6]. Latibari, J. (2012). Investigation on production of bleachable chemi-mechanical pulp from wheat straw. Iranian Journal of Wood and Paper Science Research, 26(4): 634-646.
[7]. Eshkiki R. B., and Resalati H. (1999). Study on the effect of extent of delignification on kraft pulp and paper properties. Pajouhesh & Sazandegi, 44: 84- 90.
[8]. Rasouli Garmaroudi, E., Resalati, H., and Mahdavi feizabadi, S. (2007). Effect of wood raw material combination on the properties of chemi-mechanical pulp for making Newsprint. Pajouhesh va Sazandegi, 76(3): 69-75.
[9]. Asadpour, Gh., Resalati, H., Dehghani, MR., Ghasemian, A., and Mohammad nezhad, M. (2011). The Effect of cationized CMP fines on newsprint pulp properties. Journal of Forest and Wood Products, 64(4): 357-368.
[10]. Tappi Standard Test Methods. (2009). Tappi Press, Atlanta, GA. USA,1382p.
[11]. Afra, E. (2003). Properties of Paper. Agricultural Sciences Press, 392p. (In Persian).
 
 
 
Forest and Wood Products
Volume 69, Issue 2
October 2016
Pages 397-406

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