PAPER making! g! FROM THE PUBLISHERS OF PAPER TECHNOLOGY INTERNATIONAL ® Volume 9, Number 1, 2023
TISSUE "Converting operations impact on tissue paper product properties – A Review", J. Costa Vieira et al, BioResources , Vol.18(1), 2023. Tissue paper is deep-rooted in our daily life because of its different types of products that allow various applications. Tissue paper is a low grammage paper that is mainly characterized by softness, tensile strength, liquid absorption, and elasticity. These characteristics are essential when producing products such as toilet paper, kitchen rolls, hand towels, napkins, and facials. The tissue paper production involves two stages: formation of the tissue paper sheet itself and its converting into different finished products. Converting is characterized by several operations, namely: unwinding, winding, embossing, lamination, perforation, cutting, packaging, and palletizing. The most impacting operation is the embossing, which consists of marking a pattern on the paper sheet by applying pressure, with the intent to produce papers more aesthetically pleasing to the final consumer and/or a way to identify a particular brand. Also, it affects final properties, increasing the liquid absorption capacity and bulk but reducing softness and tensile strength. Converting is complex and has a huge impact on the finished products properties. In this review, the authors explored the different steps of converting and how they impact the different properties of finished tissue products. “Chitosan Superabsorbent Biopolymers in Sanitary and Hygiene Applications” , Peenal Arvind Mistry et al, International Journal of Polymer Science , Vol.2023. The consumption of diapers and sanitary products has constantly been rising. Several problems are associated with using chemical-based sanitary products, which are difficult to degrade easily and cause nappy rash and bacterial infections in babies. Therefore, there is an increasing shift towards natural-based sanitary products because of their biodegradability, non-toxicity, and biocompatibility. Several studies are being carried out in which researchers have incorporated natural polymers, such as cellulose, starch, alginate, and xantham gum for producing superabsorbent materials. Chitosan (CS) is one such natural polymer that exhibits anti-microbial activity because of the functional groups present in its structure. Moreover, it is also easily available, biodegradable, and non-toxic. This review mainly focuses on CS’s properties and several approaches to synthesizing natural polymer-based superabsorbent products, such as sanitary pads and diapers. It also briefly discusses the diversified applications of CS as a biopolymer in the cosmetic, medical, food, and textile industries. In addition, this study implies using CS as a superabsorbent biopolymer in the manufacturing and producing sanitary products for women and children. Due to the excellent water retention capacity, swelling ability, and anti-microbial activity exhibited by CS can be considered a potential candidate for producing superabsorbent biopolymers. WASTE TREATMENT “ Microbiotechnology-Based Solutions for Removal and Valorization of Waste in Pulp and Paper Industry ” , Nada Verdel et al, in Biorefinery for Water and Wastewater Treatment , Springer, 2023. The pulp and paper (P&P) industry is an important industrial sector and the third largest producer of industrial wastewaters in the world. Although the industry has attempted to reduce water consumption by completely enclosing their processes, the water (whitewater) cycles and release of pollutants into the environment, this current and past water treatment solutions have failed it to reach their goals. Bioaugmentation of systems for wastewater treatment is an evolving microbiologically-based strategy with a high potential for industrial use. Use of specific microorganisms can help remove even the most resistant organic additives and transform large amounts of the readily available waste compounds, but has a minimal impact on the environment and the reduction of treatment costs. The classical state-of-the-art microbiological treatment approaches and
Technical Abstracts
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