Textiles braided fabric

CA 68, 3093(1968) (Describes an expl tape approx 5 /8-inch wide fabricated by bonding together with a w-based latex adhesive 8 strands of textile covered detonating cord having a diam of ca 0.06-inch, the expl core of which contd 4 grains of PETN/ft and was enclosed in a textile braid. This tape has sufficient flexibility so that it can be folded back on itself or tied in knots at any point w/o cracking. 

Woven, knitted and braided fabrics for medical textile products are made from yarns that contain fibers, whereas nonwoven fabrics can be made directly from fibers or even polymers. Expanded PTFE fabrics and electrospun webs of micro and nano denier fibers, used in medicine, are examples of products made directly from polymers. All fabrics mentioned vary widely in their construction parameters and, therefore, in the performance characteristics obtained from a given raw material. There is, therefore, a hierarchy of structure. The performance of a final product can be modified from two to four levels of organization. 

Fig. 4.4 Textile structures fabricated from P(4HB) a 16 filament-braided tube b circular weft-...

Nonwovens are structures of textile materials, such as fibres, continuous filaments, or chopped yarns of any nature or origin, that have been formed into webs by any means, and bonded together by any means, excluding the interlacing of yams as in woven fabric, knitted fabric, laces, braided fabric or tufted fabric. 

Figure 10.18 Application of microbraided yarn to textile, (a) Woven fabric, (b) flat braided fabric, (c) plain knitted fabric, and (d) multiaxial warp knitted fabric.

The yam bending or straightening shown in Figure 9 is in many cases the most significant deformation mode in many textiles. It is the most influential mode in knitted fabrics because of the knit loop geometry. Straightening also occurs to a lesser extent in woven and braided fabrics depending on the amount of crimp or yam undulation present in the fabric stmcture. 

A2 + E2) Commingling Interweaving, braiding Mixed yarn Textile fabric Filament winding, pultrusion Hot pressing, pultrusion Yes... 

Due to the complex nature of the textile reinforcement since air can become entrapped in the interstices of the fabric structure. This can be particularly evident when coarse yams (or tows) are used or in complex three-dimensional (3-D) stmctures, e.g. braided or woven, and may be most prevalent at the tool/composite interface. 

Manufacturers of composite structures have traditionally used prepreg tape to manufacture structural components. Fibres are initially combined into unidirectional tows (bundles) of fibres combined into fabrics, e.g. by weaving or knitting. The vast majority of the tows employed in woven, braided or knitted reinforcements comprise low twist or untwisted continuous filament yams. Three-dimensional technical textiles can be produced by weaving [5], knitting [6] and braiding [7] or as non-crimp fabrics. 

The available forms of reinforcement follow terminology and technology borrowed from the textile industry. The basic forms described throughout this chapter and other chapters for glass and other fibers including hybrid mixtures are summarized in this chapter. They are continuous filament, woven fabrics, nonwoven fabrics, knitted fabrics, braids, and tapes. 

Fiber, textile Fibers or filaments that can be processed into yarn or made into a fabric by interlacing in a variety of methods, including weaving, knitting, and braiding. These forms of textile are used with plastics to fabricate parts such as high strength tubes/pipes, electrical and medical devices, etc. 

Fabric identifies any woven, nonwoven, knitted, felted, bonded, braided, knotted, three-dimensional (3-D), chopped mat, etc, textile material used to fabricate RP products. Information on fabrics applicable to different materials of construction and uses that relates to... 

During prepregging (Fig. 6) the woven-, braided- or non-erimped fabric textile gets coated with resin. Afterwards the composite - now called prepreg - gets heated up to lower the viseosity of the resin. Thus, the resin can penetrate into the yam. Heated or unheated squeeze rollers can full the resin more over into the yarn and force the penetration. Depending on the maehine and the produeer... 

Of the available textile reinforcements (woven, braided, knitted, stitched), many can now be considered to be mature applications. For example, non-crimp fabric (carbon fibre) is used to manufacture the A380 rear pressure bulkhead at 240kg, in mass, 6.2m long, 5.5m wide, and 1.6m deep, this can be classed as a large structure at a smaller length scale, braided carbon fibres are now used regularly for high performance bicycle frames. 

The 21st century has already seen rapid advances in the field of textile-based composites. In addition to traditional two-dimensional woven fabrics, multiaxial non-crimp fabrics are now very widely used, with a rapidly growing number of applications for braided composites. Developments in three-dimensional weaving, combining through-thickness reinforcement with excellent in-plane properties, provide new design solutions for situations where delamination must be avoided. Textile reinforcement is thus providing major new areas of opportunity for composite materials worldwide. 

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