The impact of an acidic post-treatment on surface-modified old corrugated cardboard (OCC) with NaOH-urea as a reinforcing agent

Chemical surface modification is one method for enhancing the mechanical and barrier properties of packaging paper. The NaOH/urea solvent system has been deemed an effective, inexpensive, cost-effective paper cellulose dissolution due to its unique self-reinforcing qualities fact that it can be utilized on industrial scale, although ineffective porous requires pre- or post-treatment. This study examined influence acid as a post-treatment with improve relative uses. results indicated OCC semi-crystalline material did not result in materials superior resistance qualities. While treatment increased tensile burst strength air permeability, was at increasing tear strength. Properties control, treatment, acidic post papers were respectively 33.31, 29.4, 37.46 mn/g index, 1.7, 1.58, 1.74 Kpa.m2/g 9.94, 9.07 8.87 mn.m2/g 2.04, 1.34 1.32 s-1 smoothness, 37.2, 38.2 45.4 s resistance, 77.5, 90.8 80.5 water absorption. Therefore, without post-treatment, sheets became hydrophilic.