PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 7, Number 1, 2021
biodegradability of the packaging material, the polymeric matrix can be reinforced with different fillers mainly biofiber, clay and agriculture biomass. Herein, this chapter book reviews the different classes of food packaging paper and their roles, manufacturing, applications and also the effects of antimicrobial agents on the final properties of packaging papers. The major aim of this review was to highlight the effect of several antibacterial agents on final mechanical and biological properties of biomass-based composites and nanocomposites materials. This chapter is divided into three parts, the first one is dedicated to the classifications and roles of food packaging systems, the second part is devoted to the manufacturing of packaging paper based on agriculture biomass, the third part concern the applications of these materials and the side effect of the antibacterial agents on their properties. From the results obtained in this research work, we can conclude that the agricultural biomass can be used to manufacture food packaging by several techniques mostly pulp manufacturing processes. Also, the mechanical and antibacterial properties of these materials can enhanced by the addition of divers antibacterial agents. STARCH “Improving the adhesion -to-fibers and film properties of corn starch by starch sulfoitaconation for a better application in warp sizing”, Wei Li, Zhengqiao Zhang, Lanjuan Wu, Zhifeng Zhu & Zhenzhen Xu, Polymer Testing , 98, June 2021, 107194. The purpose of this work was to develop a new starch-based sizing agent [sulfo- itaconylated starch (SIS)] with high adhesion and film properties, through starch sulfo- itaconation containing itaconation of acid-hydrolyzed starch (AHS) with itaconic anhydride and subsequent sulfonation with NaHSO 3 in aqueous medium. The granular SIS was characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) techniques. The adhesion of SIS to cotton fibers was evaluated by a standard method (FZ/T 15001 – 2008). And its film properties were also investigated in terms of tensile strength, breaking elongation, moisture regain, bending endurance and degree of crystallinity, etc. The experimental results showed that the SIS samples had higher adhesion to cotton fibers and lower film brittleness than AHS as a control. Increasing the level of starch sulfo-itaconation could gradually enhance bonding strength to cotton fibers, and increase breaking elongation and bending endurance of SIS film, indicating that increasing the number of sulfo-itaconate substituents could play a significantly positive role in overcoming the shortcomings (insufficient adhesion and brittle film) of starch. Considering the previous results, the granular SIS with a modification level range of 0.034 – 0.041 showed potential for the use as a new starch-based sizing agent in paper-making and textile industry. TESTING “ Estimation of the Compressive Strength of Corrugated Cardboard Boxes with Various Perforations ”, Tomasz Garbowski & Tomasz Gajewski, Energies 2021, 14(4), 1095. This paper presents a modified analytical formula for estimating the static top-to- bottom compressive strength of corrugated board packaging with different perforations. The analytical framework is based here on Heimerl’s assumption with an extension from a single panel to a full box, enhanced with a numerically calculated critical load. In the proposed method, the torsional and shear stiffness of corrugated cardboard, as well as the panel depth-to-width ratio is implemented in the finite element model used for buckling analysis. The new approach is compared with the successful though the simplified McKee formula and is also verified with the experimental results of various packaging designs made of corrugated cardboard. The obtained results indicate that for boxes containing specific perforations, simplified methods give much larger estimation error than the
Technical Abstracts
Page 8 of 13
Made with FlippingBook Ebook Creator