Browsing by Author "Mazari, Adnan"

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    Analysis of thermal properties, water vapor resistance and radiant heat transmission through different combinations of firefighter protective clothing
    (INST NATL CERCETARE-DEZVOLTARE TEXTILE PIELARIE-BUCURESTI, STR LUCRETIU PATRASCANU NR 16, SECTOR 3, BUCURESTI, 00000, ROMANIA, 2018-01-01) Naeem, Jawad; Mazari, Adnan; Akcagun, Engin; Havelka, Antonín; Kůs, Zdeněk
    This experimental work is an effort to seek the possibility of improvement in thermal protective performance of firefighter protective clothing at different levels of heat flux density. Improvement in thermal protective performance means enhancement in the time of exposure against the heat flux, which will provide extra time to firefighters to perform their duties without suffering from severe injuries. Four different multilayer combinations of firefighter protective clothing were investigated. Each combination consists of outer shell, moisture barrier and thermal liner. Aerogel sheet was also employed as a substitute to thermal barrier. Initially, properties like thermal resistance, thermal conductivity. and water vapor resistance of multilayer fabric assemblies were investigated. Later on these combinations were exposed to different levels of radiant heat flux density i.e. at 10, 20 and 30 kW/m(2) as per ISO 6942 standard. It was noted that those combinations in which aerogel blanket was used as thermal barrier acquire greater thermal resistance, water vapor resistance and have less transmitted heat flux density values.
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    Effect of nano silver coating on thermal protective performance of firefighter protective clothing
    (TAYLOR & FRANCIS LTD, 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND, 2019-06-03) Naeem, Jawad; Mazari, Adnan; Voleský, Lukáš; Mazari, Funda
    The main aim of this experimental work is to find out possible improvement in thermal protective performance of firefighter protective clothing when subjected to different level of radiant heat flux density. Firefighter protective clothing normally consists of three layers: outer shell, moisture barrier and thermal liner. When thermal protective performance of firefighter protective clothing is enhanced, the time of exposure against radiant heat flux is increased, which will provide extra amount of time to firefighter to carry on their work without suffering from severe skin burn injuries. In this study, the exterior side of outer shell was coated with nano-silver metallic particle through magnetron sputtering technology. Coating of outer shell with nano-silver particles was performed at three level of thickness, i.e. 1, 2 and 3 mu m, respectively. All the uncoated and silver coated specimens were then characterized on air permeability tester, Permetest and radiant heat transmission machine. It was observed that coating has insignificant difference on the air and water vapor permeability of specimen and a significant decline was recorded for the value of transmitted heat flux density Q(c) (kW/m(2)) and percentage transmission factor (%TF Q(o)) as compared to uncoated specimen when subjected to 10 kW/m(2) and 20 kW/m(2) indicating improvement of thermal protective performance. These values go on further reduction with increase in thickness of coating layer of nano-silver particles.
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    LIQUID MOISTURE TRANSPORTATION PROPERTIES OF FUNCTIONAL UNDERWEARS: PART 1
    (Sciendo, 2019-06-01) Hussain, Sajid; Glombíková, Viera; Akhtar, Nasrullah; Mazari, Adnan; Mansoor, Tariq; Khan, Kanwar Ali Haider
    This study investigates the effect of material composition on moisture management properties. Fiber type has significant influence on the moisture management properties of knitted fabrics. In this article, single jerseys knitted fabric samples with different yarn compositions were prepared. Liquid moisture transportation properties including wetting time, absorption rate, spreading speed, one-way transportation capability, and OMMC were evaluated by Moisture Management Tester (MMT) and vertical wicking was evaluated using thermography system and image analysis. Knitted sample having fine cotton yarns with coolmax and micro denier multifilament polypropylene showed best liquid transportation properties. There is a strong co-relation between OMMC and accumulative oneway transport index with vertical wicking of knitted samples.