The effect of pulp production times on the characteristics and properties of hemp-based paper

The aim of this study was to determine if the pulping process (i.e., beating) time of hemp cellulose fibers significantly affected the characteristics and mechanical properties of hand-made hemp paper. Hemp stalk were beaten using different pulping sequences, and two pulp groups were used to make the different hemp paper (under beaten, UB, and over beaten, OB). The hemp pulp and paper groups were analyzed using visual, chemical, physical, and mechanical tests. This study revealed that the characteristics of the hemp paper groups correlated with beating time. Ideal paper was produced from OB pulp, as it was stiffer, stronger, and tougher. The enhanced mechanical properties of the OB paper were the result of fibers with smaller diameters, from increased fibrillation, which resulted in a more amorphous, uniform paper product. The outcomes of this study will help with standardizing the hemp paper production process, obtaining more repeatable and desirable results for manufacturing, allowing for more widespread use of hemp while reducing the environmental impacts of the paper industry.