Geri Dönüşüm Lifler İçeren Süprem Kumaşların Isıl Konfor Özelliklerinin İncelenmesi

Bu çalışmada orijinal (ORJ) ve geri dönüşüm (GD) pamuk lifleri kullanılarak, %100 ORJ, %100 GD ve 50/50 ORJ/GD pamuk lifleri içeren iplikler üretilmiş ve bu iplikler ile üretilen süprem kumaşların ısıl konfor özellikleri incelenmiştir. Bu amaçla konfeksiyonda açığa çıkan kumaş kırpıntılarından elde edilen geri dönüşüm pamuk lifleri ve orijinal pamuk lifleri open-end rotor iplik eğirme sisteminde eğrilmiş ve bu ipliklerden süprem kumaşlar üretilmiştir. Geri dönüşüm ve orijinal pamuk ipliklerinden elde edilen bu kumaşların ısıl konfor özelliklerini karşılaştırmak amacıyla; ısıl iletkenlik, ısıl direnç, ısıl soğurganlık ve hava geçirgenlik özellikleri ölçülmüştür. Kumaşlarda geri dönüşüm pamuk liflerinin kullanımının kumaşların ısıl direnç değerlerini arttırdığı; ısıl iletkenlik, hava geçirgenliği ve ısıl soğurganlık değerlerini düşürdüğü gözlenmiştir. Geri dönüşüm liflerinden örülmüş süprem kumaşların ısıl direnç değerlerinin yüksek olmasının ve ilk temasta daha sıcak bir his vermesinin orijinal liflerden üretilen kumaşlara göre kullanım alanına bağlı olarak üstünlük sağladığı düşünülmektedir

An Experimental Investigation About the Effect of Loop Structures Differences on Elastic Properties of Franse, Tricot and Tuch Warp Knitted Fabrics

Bu çalışmada, açık ve kapalı ilmek yapılarının çözgülü örme kumaşların bir takım fiziksel özelliklerini etkileme şekli araştırılmıştır. Bu amaçla akrilik (PAC), polyester (PES) ve pamuk iplikleri kullanılarak franse, triko ve tuch örgülerinin açık ve kapalı ilmekli türlerini içeren numuneler üretilmiştir. Bu numuneler üzerinde ilmek iplik uzunluğu ölçümü, toplam uzama ve kalıcı uzama testleri yapılmıştır. Elde edilen sonuçlar ilmek yapısı, örgü türü ve hammadde türüne göre istatistikî olara değerlendirilmiştir. Bu değerlendirmelere göre, numunelerin toplam uzama ve kalıcı uzama özellikleri üzerinde hammadde türü, örgü türü ve ilmek yapısının tek başına belirleyici olmadıkları anlaşılmıştır. Toplam uzama ve kalıcı uzama özellikleri üzerinde hammadde türü ve örgü türünün diğerlerine göre daha etkili olduğu ve belirtilen özellikler üzerinde ikisinin ortak bir etkiye sahip olduğu anlaşılmıştır

An Investigation on Recycling of Blanket Trimmings Through Needle-punched Nonwovens

Utilization of recycled fibers in nonwovens has been an attractive issue for researchers considering environmental and economic benefits. In this study blanket trimmings and mechanically recycled fibers were blended and softly needle-punched to be used as interlayers of traditional needle-punched nonwovens. The outer layers from polypropylene (at four different mass per unit areas), from recycled polyester (at four different mass per unit areas), from mechanically recycled fibers (at three mass per unit areas) and the control groups were produced by classical needle-punching at two needle-punch densities. The recycled interlayers consisting of blanket trimmings and mechanically recycled fibers and are then fixed by needle-punching again, between the two twin layers of needle-punched nonwovens of those three types of raw materials. Control groups did not include the recycled interlayers. Hence, three layered end products were obtained. Tensile characteristics of the end products were evaluated in terms inter layer ratio of the end products, raw material type of outer layers and needle-punching density through standard test methods. The results were statistically analyzed in SPSS 23.0-One way ANOVA. In the conclusion, blanket trimmings were successfully entangled to the end products as interlayers and it was observed that the strength of the nonwovens decrease with the higher recycled interlayer ratio and increase with needle-punch density

Hava Filtrasyonu Amacıyla Kullanılan Tekstillerin Verimlilikleri ve Toz Tutma Kapasiteleri

Son yıllarda artan nüfusa ve gelişen teknolojiye bağlı olarak hava kirliliği canlıların sağlığını tehdit eden ciddi bir sorun haline gelmiştir. İç ve dış ortamlarda maruz kalınan havanın kalitesi insan sağlığı üzerinde oldukça büyük öneme sahiptir. Farklı tiplerdeki kirleticilerden arınmış temiz hava solumak adına hava filtrasyonu uygulamaları hayatımızda geniş yer bulmaktadır. Bu nedenle filtrasyon verimliliğinin ölçülmesi, verimlilik ölçümü ile ilgili standartlar, işlem kalitesinin saptanması ve filtre malzemesinin konstrüksiyonunun optimum hale getirilmesi açısından araştırmacıların ilgisini çekmiştir. Bu yazıda genel olarak verimlilik ölçüm yöntemleri ve hava filtrasyonu ile ilgili standartlar detaylandırılmış ve başlıca hava filtrasyonu uygulama alanları sunulmuştur

Efficiencies and Dust Holding Capacities of Textiles Used For Air Filter Applications

In recent years due to the increasing population and developing technology, air pollution has become a serious problem for living organisms which threatens their health. Quality and purity of indoor and outdoor air have great importance on the health of human beings. To breathe clean air, purified from different types of contaminants, air filtering applications are essential in our daily lives. Hence, measurement of filtration efficiency, concerned standarts of efficiency measurement methods have attracted great attention of researchers considering the determination of the quality of filtering processes and providing optimum construction parameters for filtering material. In this paper, efficiency measurement methods and standarts of air filtering processes are mentioned in details and major air filter application areas are presented

An Investigation on Recycling of Blanket Trimmings Through Needle-punched Nonwovens

Utilization of recycled fibers in nonwovens has been an attractive issue for researchers considering environmental and economic benefits. In this study blanket trimmings and mechanically recycled fibers were blended and softly needle-punched to be used as interlayers of traditional needle-punched nonwovens. The outer layers from polypropylene (at four different mass per unit areas), from recycled polyester (at four different mass per unit areas), from mechanically recycled fibers (at three mass per unit areas) and the control groups were produced by classical needle-punching at two needle-punch densities. The recycled interlayers consisting of blanket trimmings and mechanically recycled fibers and are then fixed by needle-punching again, between the two twin layers of needle-punched nonwovens of those three types of raw materials. Control groups did not include the recycled interlayers. Hence, three layered end products were obtained. Tensile characteristics of the end products were evaluated in terms inter layer ratio of the end products, raw material type of outer layers and needle-punching density through standard test methods. The results were statistically analyzed in SPSS 23.0-One way ANOVA. In the conclusion, blanket trimmings were successfully entangled to the end products as interlayers and it was observed that the strength of the nonwovens decrease with the higher recycled interlayer ratio and increase with needle-punch density

Buckling behavior of 1 x 1 rib knitting laminated plates with cutouts

WOS: 000264967800009The purpose of this study is to investigate the cutout shape effects on the buckling behavior of 1 x 1 rib knitting glass/epoxy laminated plates in three different knitting tightness levels as low, medium and high. The composite plate is produced five plies as [0 degrees](5Course) by using hand lay-up technique. In order to investigate the shape effects, five different plates are used such as, without cutout (W-C), central circular/elliptical cutout (C/E-C), central square/rectangular cutout (S/R-C), edge semi-circular/semi-elliptical cutout (SC/SE-C), and edge semi-square/semi-rectangular cutout (SS/SR-C). In addition, circular/elliptical diameter-to-plate width ratio and square/rectangular length-to-plate width ratio effects on buckling load of 1 x 1 rib knitting glass/epoxy plates are also investigated. The experimental buckling loads of plates are obtained by clamping from two edges and then these results are compared with the results calculated from the numerical analysis. ANSYS 10 commercial software is used for numerical study. A good agreement was obtained between finite element method and experimental measurements. Results are showed that the buckling loads depend on the cutout area and the level of tightness. (C) 2008 Elsevier Ltd. All rights reserved

A preliminary study on puncture resistances of top and bottom layers of multi-layered needlepunched nonwoven geotextiles

AutoTech;Eventora;Rieter;Saco;Showroom1017th World Textile Conference: Shaping the Future of Textiles, AUTEX 2017 -- 29 May 2017 through 31 May 2017 -- -- 131781Needlepunched nonwoven textiles are commonly used as geotextiles for various applications. Considering both environmental and economical benefits, utilization of recycled fibres in nonwoven geotextiles has become an attractive issue. Within this scope, the aim of this study is to evaluate the puncture resistance performances of top and bottom layers of multi-layered needle punched nonwovens made of recycled fibres to be used as membrane protective geotextiles by comparing them with those of made from polypropylene and polyester fibres. Puncture resistance results indicated that nonwovens made of recycled fibres demonstrated good performances at this preliminary stage. © Published under licence by IOP Publishing Ltd.Firat University Scientific Research Projects Management Unit: 2016/MF 008In this study puncture resistance performances of 12 types of preneedle punched nonwovens in 3 different raw materials and 4 equivalent mass groups were compared considering mass per unit area values and raw material types. When mass per unit area values were taken into account; between each raw material group, it was obviously seen that for both PP fabrics and PET fabrics puncture resistances increased with increasing mass per unit area values as expected excluding the puncture resistance of the PET fabric of 250g/m2. Considering recycled fabrics it can be observed that except the puncture resistance value of the fabric of 200 g/m2 rising values took place for rising mass per unit area values respectively. In different raw materials groups, punctrure resistance values obtained for PP fabrics were found to be the lowest values for each group of mass per unit area excepting the group of fabrics of 200 and 250g/m2. The puncture resistance values of PET fabrics except the fabrics of 200 and 250g/m2 came after for each group of mass per unit areas. The puncture resistance of recycled fabrics were the highest excluding the fabric group of mass per unit area of 200 g/m2. Besides, recycled fabrics performed dramatically good puncture resistance values that can be related with the entanglement of longer fibers they involve. Acknowledgments This work has been supported by the Usak University Scientific Research Project under grant [2016/MF 008]

COMPARISON OF STRUCTURAL AND PHYSICAL PROPERTIES OF PES SHEATED PA AND PES DOUBLE BRAIDED ROPE LANYARDS USED IN WORKING AT HEIGHT

Today occupational health and safety has become an important issue. Working at height is one of the important matters in occupational health and safety. When working at height, it is important to use protective equipments. Some of the important ones are working ropes and positioning lanyards. There is various type of lanyards. According to manner of work, lanyards are selected according to the standards. In this context, general information will be given about ropes suitable for working at height. According to market research, most used lanyards were selected and by changing some parameters of production, lanyards that had various properties were produced. Their mechanical and structural properties were tested

The effect of needling intensity and reinforcement material on the breaking and tear strength of needle-punched filter cloth

Filtreleme işlemi endüstriyel uygulamalarda yaygın olarak karşılaşılan bir işlemdir. Tekstil esaslı filtreler yapılarından dolayı filtreleme alanında büyük ilgi çeker. Özellikle dokusuz yüzey kumaşlar, kuru hava filtrelemede sıkça tercih edilir. Dokusuz yüzeyler yüzey fıltrelemenin yanında derinlik filtrelemesine izin veren yapıları sebebiyle, hava filtreleme uygulamalarında oldukça avantajlıdır. Bu çalışmada, iğnelenmiş dokusuz yüzey filtre kumaşları dokuma kumaş takviyeli ve takviyesiz olarak farklı iğneleme yoğunluklarında üretilmiştir. Kopma ve yırtılma mukavemetleri kumaşın kullanım sırasında maruz kalacağı zorlanmalara karşı mekanik özelliklerindendir. Bu özelliklerin takviye malzemesine ve iğneleme yoğunluğuna göre değişimi incelenmiştir.Filtration is a common process in industrial applications. More attention is paid to textile based filters because of their structures. Especially nonwoven fabrics frequently preferred in dry air filtration applications. Structures of nonwovens allow depth filtration besides surface filtration and make them advantageous in air filtration applications. The needle-punched nonwoven fitler fabrics are produced with and without woven reinforcement materials, with different needeling intensities in this study. Breaking and tear strengths are the mechanical features of the filter cloth against the forces during usage. Variations of those properties are examined according to reinforcement material and needling intensities