Impact of embossing on liquid absorption of toilet tissue papers

Abstract

Absorption capacity is a key feature of toilet tissue papers. Several parameters can affect their final absorption capacities, such as pulp composition, stock preparation, number of sheets, additives, bulk, grammage, and converting process parameters, such as the embossing operation. In this work, the absorption capacities of four different 2-ply industrial toilet tissue papers, as well as the respective base papers from the mother-reel was compared using the immersion method according to ISO 12625-8 (2010). Previously, these samples were characterized in terms of morphology, grammage, thickness, and bulk. It was concluded that the embossing operation noticeably increased the thickness and bulk of toilet tissue paper. Furthermore, it was also verified that among the various toilet tissue paper samples there was not a noticeable variation in the time of water absorption because the samples revealed similar morphology and porosity. However, it was found that the bulk increased more than 150%, resulting in an increase of water absorption capacity over 60%.

Embossing Lines and Dots Geometry Effect on the Key Tissue Paper Properties with Finite Element Method Analysis

“…Finally, the third module of the optical system [21] enables the study of the spreading kinetics of liquid droplets, performing their ejection onto the surface of the samples and acquiring images of their interaction for a given period of time (from 35.7 The samples were also analyzed by using three different modules of the customized optical system for the visual inspection of their surfaces, for the topographic reconstruction of the samples in three-dimensions, and also for the study of their interaction with liquid droplets. Specifically, the first module of the optical system [9][10][11] enables the image acquisition of the surfaces of the paper samples engraved with the different embossing patterns, considering highly detailed and magnified images, having shown to be very versatile in other similar studies [12][13][14][15][16]. The second module of the optical system, originally developed for the evaluation of topographic changes manifested on the surface of textiles [17][18][19][20], was used as a complement to the first module, to further explore the inspection of the paper samples, reconstructing their surfaces in 3D, enabling us to fully observe, in different views, the differences of the engraving marks obtained with the different considered embossing plates.…”