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Investigation of Warp and Weft Knitted Fabric Acoustic Structures Derived from Garment Waste

Journal of Textile Science and Technology 2022年第1期8卷 35-42页

作者： Alhayat Getu Temesgen omprakash sahu Department of Textile Engineering Institute of Technology Wollo University Kombolcha Ethiopia Department of Chemical Engineering UIE Chandigarh University Mohali Punjab India

The mechanical performance of knitted fabric was significantly affected by loop density and geometries. Knitted fabric composites occupy a special position in the field of engineering materials because of their easy to form complex components and high impact energy absorption. But Knitted fabric composites have low in-plane tensile strength because the yarns are in a loop structure in the materials. Sound insulation requirements in automobiles, manufacturing environments, and equipment, generating higher sound pressure drive the need to develop more efficient and economical ways of producing sound absorption materials. The knitted fabric based acoustic materials were produced from cut wastes from different garment industries for their sound absorption property test as per the method described in ASTM E 1050. The acoustic performance of knitted fabrics was measured by independent tube methods for sound waves of 1000-6000 Hz. It is observed that the knitted fabrics acoustic materials prepared from waste materials showed high sound absorption than woven fabrics made from the same synthetic fibers. Moreover, the test revealed that blended knitted fabric had a better sound absorption property.

关键词： Knitted fabric Acoustic Properties Independent Tube Garment Waste

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Flower Farms Environmental Performance Evaluation in Ethiopia

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Journal of Environmental & Earth Sciences 2021年第1期3卷 48-58页

作者： Tafesse Hawera Belay Tefera omprakash sahu Department of Chemical Engineering KiOT Wollo UniversityEthiopia Department of Chemical and Food Engineering BiTBahir Dar UniversityEthiopia Department of Chemical Engineering UIEChandigarh UniversityMohaliIndia

Cultivation of cut flowers is a new agricultural sector in Ethiopia,which currently generates a high amount of income for the country's develop*** its significant contribution to economic developments;many issues were raised from communities and environmentalists concerning its environmental *** on this issue the study assesses cradle to gate of cut flower production in the Wolmera *** main objective of the study was environmental performance evaluation of flower farms in Wolmera district,Oromia regional state,Ethiopia related to operational activities throughout entire life cycles of cut flower pro*** this study,primary and secondary data were collected using ISO 14031 standard structured with LCA tool *** were collected by inventory using an on-site data collection system from its *** on data collected GHG(CO2,N2O,CH4&NH3)emissions to the atmosphere were evaluated by using an inter-governmental panel on climatic changes(IPCC 2006)for inventory data and eutrophication&acidification estimated from data tested at laboratory ***,the study also assesses banned chemicals used in the farms through inventory data assessment,and about 156 chemicals applied in the farms were collected to screen out those banned chemicals used and the two most extremely hazardous chemicals(Impulse&Meltatix)banned by WHO identified in the *** it understood from a general assessment of all flower farms;all of them haven't EIA document established before construction in the district and production started with having less attention for EHPEA code of conducts in the flower farms which faces the environments for high impacts by emission emitted from flower farms in the district as a whole.

关键词： Resources used ISO 14031 and LCA Operational performances EPE Emission

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