A comparative study of the effects of chemical crosslinking agents on NBSK handsheet properties

Chemical crosslinking is an established method for improving the wet performance of paper. In chemical process, covalent bonds are formed between cellulosic surfaces. The intra- and inter-fiber increase paper’s strength reduce its water absorptivity. majority published studies concern treatments with glyoxal, citric acid (CA), or 1,2,3,4-butanetetra-carboxylic (BTCA). most severe disadvantage CA, BTCA that crosslinks make fibers paper more brittle. This downside effect has largely impeded utilization in paperboard making. present study, handsheets made from Nordic bleached softwood kraft pulp (NBSK) were crosslinked methylated 1,3-dimethylol-4,5-dihydroxyethylene urea (mDMDHEU), which commonly used cotton fabric finishing. Similar to using glyoxal acid, mDMDHEU notably increased handsheet decreased absorption. Compared use did not These results suggest could be a viable agent products.