Thermomechanical pulping (TMP) and Chemithermomechanical pulping (CTMP) of South African pine species : a comparative study

[摘要] ENGLISH ABSTRACT: A study was conducted to investigate and to compare the mechanical pulpproperties of South African grown pine species. The species were evaluated withregards. to their respective· Thermomechanical pulping (TMP) andChemithermomechanical pulping (CTMP) properties. The following ten species,all 16 years old, were comparatively evaluated: Pinus ayacahuite, Pinus elliottii,, Pinus greggii, Pinus kesiya, Pinus leiophylla, Pinus patula, Pinus pseudostrobus,Pinus radiata, Pinus taeda and Pinus tecunumani Pinus piltula was used asreference throughout the study. The influence of wood anatomical properties andfibre morphology on the pulping characteristics played a key role in this study. Foreach species the wood anatomical properties including fibre dimensions weremeasured. Lignin and extractives content were also determined. Refming energyrequirements, pulp yield, shives content and fibre size distributionweie recorded.Strength and optical. properties of paper were obtained fromhandsheets. Fromthese results obtained, it was concluded that Pinus radiata was the most promisingspecies with regards to strength properties. Pinus patuia, Pinus greggii and Pinuskesiya also had good mechanical pulping characteristics. Pinus ayacahuite had thelowest strength properties but the best optical, properties along with Pinusleiophylla.

[发布机构] Stellenbosch University