Abstract: A procedure for obtaining nanofibrillated cellulose starting from a raw material including recycled or recovered paper, or recovered paper pulp or recovered cellulose comprises the stages of: immersing the raw material in an acetic acid dilution, in a concentration of 10% to 50% by volume, during a time inverse to the concentration of acetic acid; stirring the raw material immersed in the acetic acid dilution; and subsequently subjecting the cellulosic material to a mechanical process of longitudinal separation of fibers, by shear forces applied through a mixer or similar equipment capable of creating enough shearing on cellulose pulp. Thanks to the above procedure nanofibrillated cellulose from recycled paper is obtained with similar features to the nanofibrillated cellulose obtained from virgin cellulose.

Abstract: A tray formed from a sheet divided into panels, adopting a three-by-three matrix configuration, provided with a central, an upper and a lower row, each with three panels, wherein the sheet has a central panel and two end panels at its intermediate row, one at each side of central panel, these three panels intended to form the bottom, while in the upper and lower rows, there is a central panel and respectively and two panels with handle at each side, wherein additionally the end panels from each row are refolded over central panels, wherein optionally the overlapping surface of panels is glued through one or several gluing points, such that a tray with a minimum production processing, made on a single machine, and erectable “in situ”, is obtained.