Improvement of corrugated fiberboard wet properties through crosslinking in a large-scale reactor

The moisture sensitivity of fiberboard, which leads to a loss in KEYWORDS strength, stiffness, and dimensional stability is remedied by a chemical Stiffness crosslinking treatment developed at our laboratory that uses formaldehyde Wet strength and sulfur dioxide. The treatment was used to crosslink double-wall Crosslinking corrugated fiberboard in a large-scale, specifically designed reactor. We Corrugated board examined the effect of formaldehyde crosslinking on wet stiffness and wet Dimensional stability compressive strength of the linerboard component and on wet compressive Formaldehyde strength and dimensional stability of the combined board after 24-h water soaking. Fiberboard wet-to-dry property ratios increased proportionally with increasing bound formaldehyde content. Results encourage the development and use of crosslinked corrugated fiberboard in structural applications.