| Abstract:This study conducted kraft pulping and ECF (Elemental Chlorine Free) bleaching experiments on seven species of foreign hardwoods, including Acacia mangium from Vietnam, Eucalyptus nitens and Eucalyptus globulus from Australia, Eucalyptus nitens and Eucalyptus globulus from Chile, Eucalyptus dunnii from Uruguay, and Eucalyptus camaldulensis from Thailand. The pulping performance and bleaching effects were systematically evaluated through comprehensive analysis of chemical composition, pulp yield, bleaching efficiency, fiber morphology, and paper strength. The results indicate that Eucalyptus globulus and Eucalyptus nitens from Chile and Australia exhibit excellent performance in terms of pulp yield, bleaching efficiency, and paper strength, making them ideal raw materials for bleached kraft pulp. In contrast, Eucalyptus dunnii from Uruguay and Eucalyptus camaldulensis from Thailand showed inferior pulping performance, necessitating process adjustments to reduce costs and improve efficiency. This research provides valuable insights for domestic pulp manufacturers in raw material selection and process optimization. |