Studies on Pulping Method and Wood Chemical Properties of Slash and Loblolly Pines

This report describes fiber characteristics and chemical composition of Slash Pine (P. elliottii Engelm), Loblolly Pine (P. teada L.) planted indifferent areas, as well as of Masson Pine (P. massoniana Lamb.) for comparison. The wood of these 3 pines were treated by 3 different pulping processes, NSSC (neutral sulphite semi-chemical pulping), SCMP (semichemical mechanical pulping), and kraft pulping. The results showed that there was no obvious differences among the 3 pines in chemical composition and pulping characteristics if they were treated by the same pulping process. The NSSC pulp of all the 3 pines can be used to make kraft and wrapper of high strength and the SCMP pulp through bleaching to make daily paper, printing paper and other culture paper. The kraft pulp of the 3 pines can be used to make daily paper, other culture paper and kraft paper. The older trees exhibited better pulping characteristics. It can be concluded that Loblolly Pine and Slash Pine can be considered as qualified materials as masson pine for papermaking.