Knitted polyamide fabric

Hypotheses were set to investigate whether dyed photochromic polyamides had properties of both a UV sensor and a shielding material against solar irradiance. To test the hypotheses, knitted polyamide fabric was dyed with the following dyes ... 

We can manufacture fibers from a wide range of polymers. Polyamides, polyesters, and polypropylene can be woven or knitted into fabrics, ranging from those as coarse and strong as those used in back packs, luggage, and sails, to soft and highly flexible fabrics used in sweaters, shirts, and other apparel. Polymer filaments and yarns can be twisted or woven to make string, twine, cords, and ropes. 

A garment that conforms smoothly to an individual s body shape and moves effortlessly with every move one makes is possible using seamless technology with Tactel and Lycra yarns. The alternate needle selection knitting makes fabric open and less elastic, particularly in the welt and the cuff areas. In this context, elastic, hexible, and durable yams such as wool are recommended. In the current global scenario wool such as cashmere, and angora, and manufactured hbre such as acrylic, are used to create seamless outerwear. Viscose and polyamide with Lycra or other elastomerics are also among the other choices. 

Two thin layers of polyester are processed with knitted, space-maintaining monofilaments. The wear characteristics are similar to foam, but the warp-knitted spacer fabric is elastic and air-permeable. The material composition is 88% polyamide/nylon and 12% spandex. The spacer fabric is more commonly used for lining of cups and carriers and for cushioning of sensitive skin areas (Anon., 2002a). 

Figure 4.2 Structural variations in textiles, yams, and fibers (a) woven denim fabric 60 x, (b) knitted jersey 60 x, (c) chenille yam 57 x, (d) high-twist yam 56 x, (e) wool fiber 210 x, and (f) polyamide monofilament 210 x.

Microcapsules can be applied on any fabric (woven, knitted, nonwoven or garments). The substrate may be wool, silk, cotton, flax, or synthetic fibers such as polyamide or polyester, or mixtures. Most of the microcapsules can be appHed using conventional finishing techniques without altering the feel and color of colored fabrics or printed patterns. Microcapsules can also be applied during the rinse cycle of a washing machine. 

Soin et al. (2014) have produced a 3D-knitted spacer piezo fabric. Melt-spun PVDF yams as spacer yams are incorporated between two knitted faces made of silver-coated polyamide yams. They claim the piezo fabric that can produce a power output density of 1.10-5.10 pW cm at applied impact pressures in the range of 0.02-0.10 MPa. 

Zeng et al. (2013) have demonstrated a fibre nanogenerator made from a PVDF-NaNbOs nanofibre non-woven web, which is capable of generating a peak open-circuit voltage of 3.4 V and a peak current of 4.4 pA in a cyclic compression test. The non-woven web was sandwiched between elastic-conducting knitted fabrics made from segmented polyurethane yams wrapped with silver-coated polyamide multifilament yams. The whole device was packaged between layers of poly dime thy Isi-loxane to enhance its mechanical robustness. 

Support carrier to impart better handleability and to give good control of the final glueline thickness. Support carriers come in many formats and chemistries. The most commonly encountered are made from glass, polyamide (usually Nylon 6 or Nylon 6, 6), or polyethylene terephthalate (PET). Their format can range from random mats to highly structured woven or knitted fabrics. Typical examples of the latter are shown in Fig. 45. 

Coarse wool and long-staple synthetic fibers, especially polyamide and polyacrylonitrile, are processed with the mock-worsted spinning method. Mock-worsted yarns have an appearance similar to that of combed yarns and are used in textile floor coverings, decoration and furniture fabrics, blankets, craft knitting yarns, and technical products. Figure 3.35 shows a flow chart for the mock-worst spinning method. 

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