Composite yarns

Weng, W., Sun, Q., Zhang, Y., Lin, H.L, Ren, L, Lu, X.,Wang, M., Peng, H.S., 2014. Wmduig aligned carbon nanotube composite yarns into coaxial fiber full batteries with high performances. Nano Lett. 14, 3432-3438. 

The bicomponent fiber technology began in the 1960s on polyester and polyamide fibers. This technology encompasses a vast variety of polymers, filament shapes, and processes. As recent examples, Howe et al. [394], Wu [395], and Talley et al. [396] have disclosed spin-texture processes for the preparation of self-crimped polyamide bicomponent fibers. DuPont [397] disclosed the method for high-speed spinning bicomponent fibers. The use of a bicomponent yarn with another yarn to form a composite yarn bundle has been taught by Stevenson et al. [398] and others. 

Selection of composite yarn with stainless steel core... 

Cut-resistant gloves are fabricated from a cut-resistant composite yarn having a core yarn and a first wrapping yarn helically wrapped around the core yarn. The core is of 56-220 dtex glass fiber filament yarn. The first wrapping is a 110-680 dtex para-aramid yarn. An additional yarn is made from aliphatic polyamides or polyesters. Further, the lining yarn is a composite yarn of 110-560 dtex of an elastomer [97]. 

The cut-resistant composite yarn, the companion yam, and the lining yam are co-knit in the glove with the lining yarn plated on the interior of the glove and the cut-resistant composite yarn and companion yam forming the exterior of the glove. 

Folded yarn Also known as ply twisting, formed from two or more yams twisted together to increase strength and/or improve appearance. Spun staple fiber yams are ply twisted in direction opposite to spinning twist to give resultant composite yarn with virtually zero twist. 

Fiber reinforced composites, depending on the properties needed, can be fabricated in three different ways. Very short fibers can be used as filler, short fibers can be organized with random orientation and long fibers can be laid in one direction to form unidirectional composites. Short staple fibers may also be twisted together to form continuous yams to fabricate unidirectional composite laminates similar to those made using long fibers. Several unidirectional laminates may be combined by layering in different directions to form laminar composites. Yarns may also be woven or knitted into fabrics to form similar laminar composites. 

Verbundwerkstoff, Kompositweikstoff composite panel/ composite board Verbundplatte composite yarn F ilamentmischgam compound Verbindung... 

Bobkowicz E. and Bobkowicz A.J. (1974b), Aerodynamic spinning of composite yarns, USP 3848403. 

Bobkowicz E. (1976), Method and apparatus for the manufacture of composite yarn... 

Jou G.T., East G.C., Lawrence C.A. and Oxenham W. (1996), The physical properties of composite yarns produced by an electrostatic-filament charging method. Journal of the Textile Institute, 87,78-97. 

In his 1940 patent, Formhals described a method for making composite yarns by electrospinning onto existing cotton, wool or other pre-formed yam. It was also proposed that a sliver of fibers, such as wool, could be coated with the electrospun fibers before twisting the product into an intimately blended yarn [103]. 

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