Przeglądaj {{ collection }} wg Autor "Kropidłowska, Paulina"

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Coating functionalized with silicon carbide for cut-resistant protective glove
(Wydawnictwo Politechniki Łódzkiej, 2022) Kropidłowska, Paulina; Irzmańska, Emilia; Jurczyk-Kowalska, Magdalena
Workers’ hands are at the highest risk of being affected by harmful factors in the work environment and upper limb injury is the most widespread type of workplace accident occurring during the performance of manual tasks. The protective properties of glove materials may be improved by continuous or spot coating [1–2] with polymeric materials such as poly(vinyl chloride), polyurethane, silicone, and natural or nitrile rubber [3–6]. The objective of the present work was to evaluate the effects of different size of particles added to a polymer material applied onto a textile carrier on the cut resistance of the resulting material. Knitted aramid textile samples were coated in laboratory conditions using a polymer paste that was functionalized with silicon carbide (SiC) reinforcing particles of three different size fractions. On the basis of the research it was found that the smallest size of SiC particles had the greatest effect on increasing cut resistance.
Cut protective materials from the point of view of working environment
(Wydawnictwo Politechniki Łódzkiej, 2022) Kropidłowska, Paulina; Irzmańska, Emilia; Andziński, Radosław
Cut resistance is defined as the ability of material to resist a blade, which may be determined by means of a variety and evaluation methods, depending on the intended use of the material and the applied cutting factor. Some of the earliest studies on cutting were conducted in the 1990s involving textile and polymeric materials. The obtained results were characterized by exponential regression indicating that blade movement (the length of the cutting path) decreases with increasing loading. Those results were reflected in the first version of the international standards specifying cut resistance testing [1–2]. Cut resistance tests given in international standards are mostly used for proving that products meet specific normative requirements, but they fail to account for the complexity of the physics of cutting and fall short in terms of evaluating advanced materials arising with the fast-paced development of materials technologies [3]. Moreover, the available literature does not contain many research on the cut resistance properties of e.g. three-dimensional hybrid textile materials taking into account the real conditions of use. As a result, it is need to develop more objective methods for evaluating cut resistance properties, therefore preliminary assumptions for the new method has been described in this paper.