Continuous filament yarn

Antimicrobial acrylic fibers, 11 215-219 Antimicrobial agents, 12 31. See also Antimicrobial compounds in continuous-filament yarns, 19 758 as preservatives, 12 57-59 silylating agents and, 22 700 as soap bar additives, 22 746 sulfonamides as, 23 494 Antimicrobial compounds, microbiological methods for determining, 20 132 Antimicrobial nanoemulsion technology, 3 630-631... 

Spinnerets, for olefin fiber extrusion, 22 627, 630-631, 11 231-232 Spinner flasks, 15 691-692 Spinning. See also Solution spinning Yarn spinning technologies air gap, 11 209 of continuous-filament yarns,... 

The two main classes of polyester fibers are continuous-filament yarns and short-cut fibers, called staple. A wide range of deniers is available in continuous-filament yarns, varying from very fine deniers of about 20 up... 

Polypropylenes are available as molding powder, extruded sheet, cast film, textile staple, and continuous-filament yarn. They find use in packaging film molded parts for automobiles, appliances, and housewares wire and cable coating food container closures bottles, printing plates carpet and upholstery fibers storage battery cases crates for soft-drink bottles laboratory ware trays fish nets surgical casts and a variety of other applications. 

Fig. 12.2. Force-elongation curves of manufactured textile continuous-filament yarns at standard conditions of 70°F and 65 percent relative humidity.

Adhesion between the filaments of a yarn is an important requirement in processing of hbers. Twist contributes significantly to yarn cohesion. In the case of low-twist continuous filament yarns, filament adhesion can be improved considerably by the application of a liquid finish. Liquid bridges are formed by the applied finish, and the capillary pressure of these liquid bridges is responsible for the increase in cohesion. This is shown schematically in Figure 5 (47). The force per unit length of the fibers is given by... 

Available forms (Molding powder) Extruded sheet, cast film (1-10 mils), textile staple and continuous filament yarn, fibers with diameters from 0.05 to 1 p,m, and fiber webs down to 2 microns thick, low-density foam. 

Polyurethane fibers are another niche application. These elastanes, the basis of Lycra , have nearly taken over the textile industry, displacing rubber threads (elastodienes) in the process. The high popularity of PU fibers is attributable to the good tensile strength and elasticity of highly segmented polyurethanes. In addition, elastanes can be processed in a variety of sizes, either as continuous filaments (yarns) or as shorter fibers. Rubber threads, on the other hand, are available solely as monofilaments. ... 

Vinyon N is a continuous-filament yarn and Dynel is a staple fibre both are copolymers composed of 60 per cent vinyl chloride and 40 per cent acrylonitrile. These fibres are considerably more stable towards heat commencing to shrink at 116°C, and softening in the region of 130°C when shrinkage becomes marked. Dynel finds textile application because it has adequate stability towards heat, an extremely soft handle and is cheaper than the acrylics. 

All of the PET fibers and a majority of the continuous filament yarns are texturized, i.e., crimp is applied. 

Fiber, rayon The generic term for fibers, staples, and continuous filament yarns composed of regenerated cellulose but also frequently used to describe fibers obtained from cellulose acetate or cellulose triacetate. Rayon fibers are similar in chemical structure to natural cellulose fibers (cotton) except that the synthetic fiber contains short plastic units. Most rayon is made using the viscose process. 

Scrim A low cost reinforcing nonwoven fabric made from continuous filament yarn in an open-mesh construction. Used includes surfacing RPs to produce a smooth surface. Also used as a carrier of adhesives for use in secondary bonding of RPs, etc. 

The largest commercial volume of these materials is in the form of fibers. Continuous filament yarns are preferred where very high mechanical properties are required and staple fiber is used for textile applications. The significant volumes involved in these applications led to the development of special spinning processes designed to produce these forms. 

Textile glass—Continuous filament yarns, staple fibre yarns, textured yarns and rovings (packages)—Determination of linear density Textile glass—Yarns—Designation... 

BCF yarns n. Bulked continuous filament yarns for carpet trade, usually nylon, polypropylene, or polyester. 

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