This paper describes an experimental investigation into the effects of different types and amounts of lubricants on the friction properties of sewing threads. In this work, four types of sewing threads, CO, PET-spun, core-spun (PET/PET) and core-spun (PET/CO) were used. Three different lubricant types and lubricant feeding rates (0.5, 1 and 2 g/min) were applied to the sewing threads. The results of the research show that the type and amount of lubricant have important effects on the friction of the sewing threads. The friction coefficient values of all sewing thread types with paraffin-based lubricant were the lowest among the lubricants. As the amount of paraffin wax in the lubricants increased, the fiber/metal friction forces slightly decreased. To obtain the lowest friction coefficient, a 0.5 g/min lubricant feeding rate and a 2.5–3% lubricant amount should be used for sewing threads.
Abstract. Denim jeans are preferred because of durability and easy washing properties. Nowadays the expectations of consumers from denim fabrics are changed towards design and comfort properties. Fort this reason, thermal and moisture comfort properties of denim fabrics should be examined. This paper aims to investigate thermal, air permeability and moisture management properties of 3/1 Z twill weaved denim fabrics. These fabrics are produced mainly from cotton with different yarn count and cover factors are close to each other.
In this study, it is aimed to change the loop length of knitted fabrics with a mesh structure and to investigate the effect of loop length differences on thermal and moisture transmission properties. For this purpose, six fabrics with different loop lengths were produced in two different knittings and yarn types. Thermal conductivity, thermal absorptivity, thermal resistance, air permeability and moisture management properties of these fabrics were measured according to standard test methods. The results showed that as the yarn gets finer and loop length increases, the air permeability values will increase. It was observed that as the loop length increase, the overall moisture management capacity (OMMC) and thermal absorptivity of the fabrics will decrease. The thermal resistance values of two ply textured polyester mesh knitted fabrics decreased with increasing density and the highest loop length two ply textured polyester mesh knitted fabric showed the highest thermal resistance value.
Özet: Askeri üniforma olarak kullanılan giysiler sürekli ve uzun süre giyilmeleri ile diğer giysilerden farklılık göstermektedir. Bu tür giysilerin içinde ısı, nem ve hava hareketleri termofizyolojik konforu sağlayan en önemli parametrelerdir. Kullanıcıların konforlu hissedebilmesi için giysilerin vücuttan çıkan su buharının geçişine izin vermesi gerekir. Bu çalışmada kışlık askeri üniforma olarak kullanılan yün/polyester karışımlı kumaşların nem iletim özellikleri MMT test cihazıyla incelenmiştir. Bu amaçla farklı yün/polyester karışım oranı ve örgü yapısında olan kumaşların ıslanma zamanı, emilim oranı, yayılma hızı, kümülatif tek yönlü transfer indeksi ve genel nem yönetimi özellikleri incelenmiştir. Ayrıca nem transferi yönünden uygun kumaş yapısı belirlenmeye çalışılmıştır.Anahtar Kelimeler: Yün/polyester, askeri giysiler, nem konforu Investigating Moisture Management Properties of Weaving Military ClothesAbstract: Clothes which are used as military clothes are different from the other clothes, because they are worn continuously and long time. Heat, humidity and air movements are very important for these clothes because these parameters effect the thermophysiological comfort properties of clothes. These clothes must allow the passage of water vapour from the body of the garment to feel comfortable to wearer. In this study, moisture management properties of different blends of wool/polyester fabrics which are used in winter military clothes were examined with MMT test device. For this aim, wetting time, absorption rate, spreading speed, accumulative one way transfer index and overall moisture management capacity of fabrics, which have different wool/polyester blend ratio and weave pattern, were investigated. Also fabric pattern which are more appropriate for moisture transfer, were determined.
In this study five different knitted sport clothes were tested in a wear trial test with ten men subject. After the activity, subjects were included in a rest period of 20 minutes. In this period, microclimate temperature and relative humidity values were measured with a datalogger from four body regions (chest, abdomen, back and waist). The results showed that the lowest waist microclimate temperature value was seen in TS tencel single jersey fabric like the other three body regions. On the contrary to chest and back regions, the abdomen microclimate temperature values increase during the relaxing period. Also the lowest microclimate temperature values were seen in abdomen region. On the other hand the highest microclimate relative humidity values were seen in abdomen region ( 93-96 %).
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