Yarn filament count

Yarns and Fibers. Many different acetate and triacetate continuous filament yams, staples, and tows are manufactured. The variable properties are tex (wt in g of a 1000-m filament) or denier (wt in g of a 9000-m filament), cross-sectional shape, and number of filaments. Individual filament fineness (tex per filament or denier per filament, dpf) is usually in the range of 0.2—0.4 tex per filament (2—4 dpf). Common continuous filament yams have 6.1, 6.7, 8.3, and 16.7 tex (55, 60, 75, and 150 den, respectively). However, different fabric properties can be obtained by varying the filament count (tex per filament or dpf) to reach the total tex (denier). 

Weibull plots of various fibre properties, such as the filament count, modulus, elongation at break and the strength, can provide important information on the quality and performance of the manufacturing process. The results can be used to formulate a strategy for the improvement of the yarn properties. 

It Is of Interest to point out the Figure 2 spin line capillary diameter effect on the FOY yarn structure, where the 7 mil (0.018 cm) diameter capillary yielded no amorphous orientation change, but a significant crystallinity reduction relative to the 15 mil (0.38 cm) capillary. From the above discussion, the generally equal FOY tensile properties for yarns spun from the two capillaries are predicted from the equal amorphous orientation values at equivalent spinning speeds (Table I). The greatly reduced PTY broken filament count for the yarn textured from the higher crystallinity FOY spun from the 15 mil capillary I also consistent with the above discussion. 

Thus, the results herein support Che conclusion that Improved FOY texturing, as measured by reduced broken filament counts, can be attained via Increases In either the spun yarn amorphous orientation or crystalline content. These desired morphological changes can be achieved via Increased spinning speed, molecular weight, capillary diameter, and reduced melt tonperature. The applicability of these polyester conclusions for other synthetic fibers Is under study and will be reported in the future. 

Filament count The number of individual filaments that make up a thread or yarn. Kadolph SJJ, Langford AL (2001) Textiles. Pearson Education, New York. 

Glass strand is normally measured by the number of 100 yards in 1 lb weight (for example, a 130 s count contains 13,000 yards per pound weight or the number of grams per kilometer, imder the international unit tex. Tex is a unit for expressing linear density equal to the mass of weight in grams of 1000 m of strand, fiber, filament, yarn, or other textile strand. 

Name Cross section Total yarn count Idtaxl Filament number raw ratio m Draw temperature [ Cl... 

Yarn number n. A relative measure of the fineness of yarns. Two classes of systems are in use (1) Direct yarn number (equal to linear density) is the mass per unit length of yarn. This system is used for silk and manufactured filament yarns. (2) Indirect yarn number (equal to the reciprocal of linear density) is the length per unit mass of yarn. This system is used for cotton, linen, and wool-type spun yarns. Also see cotton count. Kadolph SJJ, Langford AL (2001) Textiles. Pearson Education, New York. 

The number of filaments per yarn, n, is counted after mounting the specimen under an optical microscope at 20x magnification. Ten yarns are randomly selected from each side of the prosthesis and the mode value of the ten measurements is taken as the number of filaments per yarn. 

Sample Count (dtex) Filaments/ yarn Ends (/cm) Picks (/cm) Twist Tigntness (Cfabric %) 6,h (mg/ 6e,p (mg/ mm) mm) ... 

With the possible combinations of glass compositions, filament diameters, yarn types, and the number of different weave patterns available, the number of possible fiberglass cloths can almost be unlimited. The effects that these glass fabrics have on the base material are driven by these variables. In addition, the fabric count, or the number of warp yarns and fill yarns, also helps determine the properties of the fabric and the base material. Warp yarns are those that lie in the length (machine direction) of the fabric, whereas the fill yarns lie across the warp direction. The warp direction is also commonly called the grain direction. 

Left single fiber fineness of gray-pigmented textured polypropylene filaments Right Pigmentation of filament yarn count 75f31 smooth (single yarn count 2.4 dtex)... 

There is no formal classification. However, carbon fiber yarn is sometimes judged by linear density, which is weight per unit length, or rated by number of filaments/ yarn count. Carbon fibers are rated by their measured modufus in GPa. 

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