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Textile fibers, threads, yarns and fabrics are measured in a multiplicity of units.. A fiber, a single filament of natural material, such as cotton, linen or wool, or artificial material such as nylon, polyester, metal or mineral fiber, or human-made cellulosic fibre like viscose, Modal, Lyocell or other rayon fiber is measured in terms of linear mass density, the weight of a given length of ...
The Kawabata evaluation system (KES) is used to measure the mechanical properties of fabrics. [1] The system was developed by a team led by Professor Kawabata in the department of polymer chemistry, Kyoto University Japan. KES is composed of four different machines on which a total of six tests can be performed: [2]
Fabric testing includes measurements such as fabric weight, fabric width, shrinkage testing, colour fastness to washing, fastness to light, pilling, tearing and bursting strength, etc. The primary consideration in fabric selection is the end use. The fabric needs vary greatly depending on the application.
Fabric quality addresses fabric-related issues. Fabric inspection is a step of visual examination apart from the performance criteria; It finds various flaws and irregularities. Accordingly, it grades the fabrics as per quality level, fabric weight, shading color, number, and size of the defects.
The “coefficient of variation of fibre diameter” (CVD) is a measure of the variation in fibre fineness within the sample fleece, relative to the average fibre diameter. Crossbred and coarse wools are often measured for mean fibre diameter by older instruments—"Airflow" in many parts of the world, and even a projection microscope in some ...
Thus one can roughly find the number of twists per inch for the single, or one can use the doubled back yarn as a measure. With a thick-and-thin yarn, it is best to count the twist over several inches and average the results. [2] This is because the number of twists per inch will tend to vary between the thin and thick sections.
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