Evaluation of Various Mechanical Pulping Processes for Mature and Juvenile Loblolly Pine in Lightweight Coated Paper
Source abstract
Abstract
Although loblolly pine (Pinus taeda) is less costly than northern softwoods, loblolly pine mechanical pulps tend to be of poor quality and are mainly used in low-value grades such as newsprint. We evaluated various mechanical pulping processes for mature and juvenile loblolly pine and their potential for use in value-added grades, especially in lightweight coated (LWC) paper. Results for black spruce were also included for comparison purposes. Pilot plant results have shown that loblolly pine is inferior to spruce in terms of sheet density, brightness ceiling, and long fiber coarseness. To some extent, the quality disadvantages of pine pulps could be offset by proper chemi-cal pre-treatment, high specific-energy application, or both, in the pulping process. With proper chemical pretreat-ment or refining, all the loblolly pine mechanical pulps should have adequate strength and light-scattering ability for LWC and supercalendered grades, compared with the general requirements reported in the literature. However, paper containing pine mechanical pulp is rougher on the surface, less dense, and has higher air permeability than the paper with spruce mechanical pulp. Therefore, proper papermaking strategies, such as precalendering, are essential to reduce sheet surface roughness and pore size before coating. This was confirmed by a LWC dynamic sheet former (DSF) sheet study that used three selected loblolly pine mechanical pulps.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Material Properties and Processing · Lignin and Wood Chemistry · Wood Treatment and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
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1. Janknecht, S., Dessureault, S., Barbe, M.C., Comparison of loblolly pine mechanical and chemical pulping processes, pulp properties, process features and pulp production cost, 1990 TAPPI Pulping Conference Proceedings, vol. 2, TAPPI PRESS, Atlanta, Georgia, USA, 1990, p. 695.
2. Harris, G., TAPPI J., 76(6): 55(1993).
3. Koga, S. and Zhang, S.Y., Wood and Fiber Sci., 34(1): 146(2002).
4. Jackson, M., The interaction of wood species and wood quality with TMP process: a review, 1998 TAPPI Pulping Conference Proceedings, vol. 1, TAPPI PRESS, Atlanta, Georgia, USA, p. 455.
5. Rudie, A.W. and Sabourin, M., J. Pulp & Pap. Sci., 29(9): 63(2002).
6. Sabourin, M.J. and Wiseman, N., Analysis of fiber comminution rates during high-intensity thermomechanical pulping of spruce and pine, Appita 55th General Pulping Conference Proceedings, Rotorua, New Zealand, 2002, 195–205.
7. Bohn, W.L. and Sferraza, M.J., Alkaline peroxide mechanical pulping: a revolution in high yield pulping, 1989 International Mechanical Pulping Conference Proceedings, KCL, Helsinki, 1989, p. 184.
8. Gentile, V.M., Tschirner, U., Wilder, H.D., The Scott Paper alkaline peroxide high yield pulping process, 1991 International Mechanical Pulping Conference Proceedings, TAPPI, Minneapolis, MN, USA 1991, p. 199.
9. Sabourin, M.J., Cort, J.B., Garvie, M., Belzile, Y., Malette Quebec Inc. starts up APMP mill for production of MFC and ground wood specialty paper grades, 1993 International Mechanical Pulping Conference Proceedings, vol. 2, PPI, Oslo, 1993, p. 1.
10. Xu, E.C., Wang S.-W., Liu B., Wang Y-Q, Li H-B., Shi L., et al., Alkaline peroxide mechanical pulping and its application for news-print--a successful start-up of the APMP system at Yalujiang Paper Mill, 1997 International Mechanical Pulping Conference Proceedings, SPCI, Sweden, 1997, p. 37.10.1016/s0273-1223(96)00910-9 ↗
11. Lindholm, C.-A. and Kurdin, J.A., in Papermaking Science and Technology (J. Sundholm, ed.), KCL & TAPPI, Helsinki, Finland, 1999, p. 223.
12. McDonald, D. and Miles, K., Chip refining at higher specific energy, Paprican Technical Report, PPR 1537, Paprican, Pointe Claire, 2001.
13. Miles, K., US Pat. No. US 6,336,602 B1, 2002.
14. Yuan, Z. and Heitner, C., Evaluation of loblolly pine mechanical pulps in LWC paper, 2007 Coating and Graphic Arts Conference Proceedings, TAPPI PRESS, Atlanta, Georgia, USA, 2007.
15. Yuan, Z., Heitner, C., McGarry, P., TAPPI J., 5(7): 24(2006).
16. McGarry, P. and Heitner, C., Southern pine bleached chemither-momechanical pulp: a comparative evaluation of pulp properties, Paprican Technical Report, PRR1737, 2007.
17. Miles, K. and Omholt, I., Improving the strength properties of TMP, 2003 International Mechanical Pulping Conference Proceedings, PAPTAC, Quebec, 2003, p. 179.
18. Sauret, G. and Lanvert, J., Technique et Recherches Papetières, 43(5): 65-70 (1965).
19. Amir, R., Silviers, G.D., Wood, J.R., J. Pulp & Paper Sci., 19(1): J26(1993).
20. Anczurowski, E., Jones, A.Y., Rutland, D.F., Pulp Pap. Can., 84(12): T283(1983).
21. Bernard, E. and Bouchayer, H., ATIP, 4(29): 113(1975).10.1090/S0025-5718-1975-0376606-9 ↗
22. Charles, L.A. and Waterhouse, J.F., J. Pulp & Paper Sci., 14(4): J59(1988).
23. Allem, R., J. Pulp & Paper Sci., 24(10): 329(1998).
24. Mokvist, A., Jackson, M., Heikkurinen, A., Court, G., Li, Z., The production of SC and LWC pulps on large capacity conical disc refining systems, 2001 International Mechanical Pulping Conference Proceedings, vol. 2, KCL, Helsinki, 2001, p. 239.
25. Argyropoulos, D.S. and Heitner, C., J. Pulp & Pap. Sci., 17(5): J137(1991).