application of cmc for improving dry and wet mechanical strengths in papers for packaging products

this research is aimed at the effect of carboxymethyl cellulose(cmc) on the mechanical properties of paper made from virgin pulp in paper. in this work, cmc was added to pulp furnished in 0%, 0.5%, 1%, and 1.5% dosages. also pulp fibers of furnishes (60hw:40sw) formed by mixing bleached softwood and bleached hardwood pulps were prepared from russia factory. then the 80-gram handsheets were prepared. all samples were placed in oven at 100±5 °c and also kept in climax condition (23±1°c and 50±2% humidity) for 24hrs before doing tests. strength properties(wet & dry tensile and wet & dry burst) then of test samples were measured. our results indicated that treating of samples with cmc increased the mechanical properties of them.