Full-field hygro-expansion characterization of single softwood and hardwood pulp fibers

Applicability of fractionation of softwood and hardwood kraft pulp and utilisation of the fractions

Tiivistelmä

Presence of Hardwood Chips and Its Impact on Pulp Strength Properties in the Production of Bleached Softwood Kraft Pulp

The effect of hardwood admixture (15-25% birch or aspen) in kraft cooking on the strength properties of the fully bleached pulp was investigated. Results obtained from both laband mill-processed ECF bleached pulps showed that adding 15-25% birch or aspen to the production of fully bleached softwood kraft pulp had a minor effect on the strength properties. No significant effect was observed for ...

Bulky Paper from Chemically Crosslinked Hardwood Kraft Pulp Fibers

There is a general interest among paper and board makers to produce lighter and bulkier paper and board products. The aim of the present study was to characterize chemically crosslinked hardwood kraft fibers regarding their potential in making bulky paper and board. Crosslinking agents are molecules that contain two or more reactive ends that form inter-chain covalent bonds with cellulosic hydr...

Desorption of Metal Ions from Kraft Pulps. Part 1. Chelation of Hardwood and Softwood Kraft Pulp with Edta

Chelation of unbleached and oxygen bleached hardwood and softwood kraft pulps with EDTA was studied. The main focus was on the desorption of magnesium, manganese, and iron due to their impact in TCF-bleaching. Desorption of other metal ions present were also studied in order to get an over-all estimation of the metal ion concentrations and their desorption during chelation. By using the concept...

Wood Identification for Hardwood and Softwood Species Native to Tennessee