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Heating profile of electro-conductive weft-knitted composite fabrics during cyclic deformation
(Wydawnictwo Politechniki Łódzkiej, 2022) Repon, Md. Reazuddin; Mikučionienė, Daiva
The goal of this research was to learn more about how heat is generated during cyclic deformation of highly conductive knitted composite fabric. The heating materials in this investigation were silver (Ag) coated polyamide (PA) yarn knitted into a pattern. At various time intervals, the temperature generated on the fabric surface was measured. An Instron tensile testing machine was used to perform the cyclic stress strain in the course direction of the developed fabric. The temperature on the conductive fabric surface increased rapidly for the first two minutes, then slowly afterward, eventually levelled off at a specific point. Heat generation is negatively influenced by stretching and cyclic deformation. Heat generation was also affected by the amount of conductive yarn used in the knitting design. The materials developed in this work could be employed in orthopaedic compression support to offer sufficient heating.
A study on barrier performance of medical face masks
(Wydawnictwo Politechniki Łódzkiej, 2022) Munir, Muhammad Usman; Mikučionienė, Daiva
The sudden outbreak and rapid transmission of SARS-Covid-19 virus has urged people around the world to adopt safety measures to help stop the spread of this infectious disease. Thus, there comes a sudden increase in demand for PPEs such as face masks and gowns. This increase in demand has paved the way for low-quality medical face masks to the public, causing a serious threat to the contamination of the Covid-19 virus. Therefore, to verify the real picture of the performance quality of medical face masks, we carried out a study to check their barrier performance as per the requirements of International Standards EN 14683 and ASTM F2100. We conducted the bacterial filtration efficiency, particle filtration efficiency and differential pressure tests on all the medical face masks samples and found that almost all the masks fall under 95% filtration to bacterial aerosol requirement, 95% filtration efficiency to latex sphere, and had differential pressure in limits. Our study has also concluded a correlation between these performance criteria, and it would be a great help and time saving if we adopted the findings of this research. The out has helped to create public confidence in their quality performance.