Diseño de un proceso para la obtención de papel a partir de cartón y papel reciclado para el municipio del cantón Ibarra

Abstract

The aim of this research was to design a process for the production of paper and board from recycled fibers. First, paper and board pulp were obtained by grinding and screening. Next, the paper and board pulp were de-inked under alkaline conditions, at this stage three variables were used: concentration of (sodium hydroxide, sodium silicate and surfactants), agitation and air flow, maintaining a constant air flow of 10 L/min and agitation time of 20 minutes. Afterwards, the paper and cardboard sheets were washed with water to eliminate ink residues, and then formed into paper and cardboard sheets, which were manually pressed to eliminate most of the water retained in the sheets. After that they were dried in an oven for 16 hours at a temperature of 35°C. The paper and cardboard sheets were characterized, determining a grammage for the paper sheet of 1.15 g/m2 and for the cardboard sheet of 1.08 g/m2, a caliber for the paper of 1.31 mm and for the cardboard of 1.36 mm. Finally, the breaking strength showed values for paper of 163.40 N/cm2 and for cardboard of 27.55 N/cm2. It is recommended to carry out three repetitions of the de-inking and pulp washing stage, in order not to use paper pulp bleaching agents.