| dc.description.abstract | The search for success in an increasingly competitive market has been the greatest challenge for the pulp and paper companies. Currently, due to globalization, companies started to seek opportunities to make their forest projects and industrial processes more efficient. The increased efficiency was achieved because of the technological innovations developments that have promoted a better use of raw materials and improved product quality. Several actions are being undertaken to propose a better use of residual chemicals widely available in the pulp and paper units. Identified this opportunity, the fundamental hypothesis tested in this study corresponded to Kraft lignin microparticles combined with amphoteric starch feasibility for use as an agent that promotes greater interaction among the fibrous elements of Pinus taeda L. pulp, improving the paper properties destined for packaging conversion. Evaluations were conducted to test the technological feasibility of adding microparticles of Kraft lignin (loads of 0%, 1% and 2% based on pulp weight) and combined amphoteric starch (loads of 0%, 2% and 4% based on pulp weight) on paper handmade sheets with pulps in three different delignification levels (Kappa numbers 60, 80 and 100). Based on the assessments, significant variations in paper sheets physical properties, mechanical strength and optical properties have been observed for the combined effect of microparticles of Kraft lignin and amphoteric starch effect. The results indicated that there was a synergy between the substances tested, proving the affinity between the microparticles of Kraft lignin and amphoteric starch on the fibrous elements. The combined utilization of both substances may be a promising and feasible alternative to improve the paper properties. | pt_BR |
