The Effect of the Sliver Fiber Configuration on the Cotton Inter-fiber Frictional Forces (original) (raw)
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We have examined the fabric-to-metal surface and fabric-to-fabric frictional characteristics (in both warp and weft directions) of a series of fabrics containing 100% polyester, 100% viscose, and P/C & P/V blends with different blend proportions. It has been observed that the normal load and the frictional force follow a logarithmic relationship for all the fabrics. The nature of fabric friction is characterised by different parameters such as the F/N ratio, and the values of n, k and k/n. Fabric-to-metal friction is found to be less sensitive to fabric morphology and rubbing direction, whereas fabric-to-fabric friction is highly sensitive to these factors. Fabric friction has been affected by many factors such as the type of fibre, type of blend, blend proportion, yarn structure, fabric structure, crimp and crimp height, compressibility, etc. In P/C and P/V blended fabrics, the frictional force increases as the cellulose fibre component increases.
Fibres and Textiles in Eastern Europe
Fibre properties are influential factors for yarn properties. Cotton, whose physical properties vary depending on the cultivation region, is still a very common fibre used in the textile industry. Properties such as fibre length, fineness, strength and maturity affect yarn tensility, evenness, imperfections and hairiness. Four different 100% cotton blends were used as raw material (American cotton, Aegean cotton, Urfa cotton, Greek cotton) to be converted into 20 tex compact yarns separately. HVI parameters of each blend type starting from the bale until the 2nd drawing passage machine revealed that yarn processing stages and machinery are influential factors for fibre the properties of fibres that are produced on a spinning line. Additionally ANOVA tests supported the idea that the evenness, tensility, yarn imperfections, and hairiness parameter of yarns produced from various cotton blends were statistically different. Principal Component Analyses (PCA) and the Correlation Matrix w...
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International Journal of Engineering, 2011
Friction measurement is one of the important and interesting problems in the study of handle properties of fabrics. Different methods have been developed for measuring friction, such as sliding, Kawabata Evaluation System (KES) and cyclic testing. In this research, considering the possibilities of varying conditions in measuring friction, a new instrument is used in which the bottom surface of fabric can be moved and the top slider is kept fixed in order to prevent slider vibrations. In this method, the force inserted by an extensible yarn connected to the trolley standing on four very smooth bearings was measured. The result of experiments confirmed 7.6% increase in correlation coefficient in the dynamic friction region for nine different test samples and about 4.6% reduction in coefficient of variation compared to the sliding type.
Physico-mechanical response of acrylic-viscose ring spun and Dref 2 friction spun yarns
Since the inception of non-conventional spinning systems, Dref 2 Friction Spinning technology characterised by low yarn tension and bundled yarn structure emerged successfully in the coarser yarn sector. This novel method is able to produce yarn with fairly soft handle, desirable mass uniformity and high bulk. A number of researchers have investigated into the tensile behaviour of ring and rotor spun yarns but not much been explored for friction spun yarns. Midgley and Pierce 1 stated that the breaking load of cotton ring yarn is inversely proportional to the logarithm of time to break the specimen. Kaushik et al 2 showed that yarns spun on a viscose majority blend are stronger but show low breaking extension than acrylic majority yarns at all twist levels. Singh and Sengupta 3 observed an increase in yarn tenacity with an extension rate ranging between 0.1-100 cm/min. Balasubramanian and Salhotra 4 observed that a very high extension rate results in lowering the tenacity of cotton yarns and maximum tenacity occurs at an optimum extension rate. Padmanabhan 5 found that friction spun yarn shows better yarn mass evenness and higher hairiness than equivalent ring spun polyester blended yarn.
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To further optimise the bullet-proof performance of textile reinforced composites, multi-directional friction tests of aramid and ultra-high molecular weight polyethylene (UHMWPE) yarns were carried out by the slope method. The influence of the included angle between the high-performance yarns on the static friction coefficient for aramid and UHMWPE yarns was studied by measuring the friction coefficient. The relationship between the static friction coefficient and the included angle among the high-performance yarns was discussed. The results showed that the friction coefficient of aramid yarns was higher than that of UHMWPE yarns. Especially, at the same included angle between high-performance yarns, the static frictional coefficient of aramid yarns is 50% higher than that of UHMWPE yarns. In accordance with expectations, the static friction coefficient decreases with the increased included angle between high-performance yarns, and the included angle of high-performance yarns chang...
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