Structural-Dimensional Properties of Plant Fibers with Combined Grinding of Conifer, Deciduous, and Bamboo Pulp

The structural and dimensional properties of paper fibers formed by combined grinding of a composite of coniferous, deciduous, and bamboo (Bambusa blumeana) fibers growing in Vietnam were studied. The composite consisted of commercial sulfated unbleached coniferous (Kappa number 21) and deciduous pulp fibers (Kappa number 16) and bamboo pulp fibers produced by a sulfate method under laboratory conditions (Kappa number 17.1). The structural and dimensional properties of the pulp composite ground to 40 ºSR in a Jokro mill were measured on an automated L&W Fiber Tester. Samples of each intermediate were studied individually. Composites of a blend of coniferous and deciduous unbleached pulp in a 50:50 ratio with 0, 10, 20, 30, 40, and 50% doses of bamboo pulp were investigated. The properties of fibers of different sizes and strengths of the cellulose wall varied differently under the action of hydromechanical loads with grinding to the same degree. Initial differences in the fractional composition by fiber length and width led to deviations from the additivity rule during studies of the properties of fiber blends.