By Zhong, Wen
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Extra resources for An introduction to healthcare and medical textiles
Get entrapped in the yarn structure. However, increased twist does make the surface of the yarn more impact and smooth, so as to make the yarn or its fabric more comfortable to the touch. 15. The direction and degree of twist can be utilized in the design and development of textile products expected to provide special performances. A good example of such product development is the self-adhesive elastic retention bandage for wound care, as detailed in Chapter 8. 5. FABRICS AND 3D STRUCTURES “Fabric” usually refers to the two-dimensional (2D) structures formed by the interlacing or binding of fibers and/or yarns, including woven, knit, nonwoven and compound fabrics.
Solution ready for the spinning is delivered to a stainless spinneret via a syringe pump. A high voltage power supply applies voltage up to 30 kV between the spinneret and a grounded fiber collector, where the pendant drop of polymer solution at the nozzle of the spinneret becomes highly electrified and the repulsive electrostatic forces overcome the surface tension, causing a charged jet of fluid to be ejected. Charges on the polymer jets lead to “splaying” or splitting of the jet into finer filaments, which are deposited on the collector after solvent evaporation.
Fabrics and 3D Structures 31 care, soft draping quality, and greater warmth in still air. , shrinkage due to the relief of tension) as a result of the distortion and extension of the loops during manufacturing processes. , for part of the yarn to be pulled out from the surface of a fabric). Broken snags may cause the knit fabrics (mostly the weft knit type) to run or ladder to form holes or vertical flaws across the entire product. , vascular grafts, see Chapter 9) in their end uses. 3. Nonwoven Fabrics Different from woven or knit fabrics, nonwoven fabrics are fabricated directly from fibers instead of yarns.