Textured nylon

Anionic dyeing assistant which gives outstanding transfer and leveling of acid dyes on nylon. It has excellent barre and streak-covering properties on textured nylon goods. 

Standard viscose and polynosic rayons are blended with cotton for improved physico-chemical properties of the blended fabric. The increase in tensile strength brought about by blending wool with viscose is well-known. Fabrics containing around 65% triacetate with viscose may be given durable pleats. Bulked or textured nylon is sometimes used with viscose rayon for fabrics. Table 4.17 shows... 

Yarn in hank form can also be dyed very successfully in the annular-cage type of forced circulation machine (see Fig. 13.4) which gives good results with cotton, rayon, and mock cakes of textured nylon. Wool, on the other hand, does not pack down very well and cannot be dyed in this way with much success. 

Spun nylon Textured nylon False twist nylon False twist nylon... 

Crimp rigidity test. A form of crimp rigidity test used in the UK for the testing of false-twist textured nylon yarns. 

The most common threads for stitching knitted sportswear fabrics are textured polyester (Figure 6.31) or textured nylon (Figure 6.32). These threads offer excellent seam coverage and seam elasticity. They also have properties that are very soft against the skin making them ideal for sportswear and underwear. 

Combinations of two or more of the above steps into consecutive processes, such as spin—draw or spin—draw—texture, reduces manufacturing costs. In addition to continuous-fHament yam, nylon is also offered in staple, tow, and flock forms. Staple is made by cutting crimped continuous-fHament yam into 3—20-cm lengths. In manufacturing, tow is made by combining many yam ends, either flat or crimped, to give a total tow size of 6—111 ktex. 

Most of the textured apparel and industrial yams are woven or knitted directly into fabric. The carpet BCF yams can be tufted directly off package into loop pile or velvet constmctions. For the textured saxony constmctions, the BCF and the spun staple yams must be ply-twisted and heat-set. The heat-setting temperature for nylon-6 and nylon-6,6 is 180—220°C in hot—dry atmosphere, and 120—140°C in saturated steam. The yams are twist-set in pressurized autoclaves or continuously on the Superba and Suesson machines (121). Before setting the twist, the yam is heated and relaxed for predevelopment of the bulk. 

Foi example, nylon pile fabrics, exhibiting higher moisture regain, have different traction characteristics under wet and dry conditions than do polypropylene-based materials. Effects of artificial turf fabric constmction on shoe traction ate given in Table 2. Especially effective in aiding fabric surface uniformity is texturing of the pile ribbon, a process available for the two principal pile materials nylon and polypropylene. 

An undesirable effect of the hygroscopic nature of nylons is that we must take care that they are dry before trying to process them in the molten state. If we were to attempt to extrude wet nylon, the water would vaporize within the extruder, creating bubbles in the melt. The result would be a non-uniform extrudate containing voids and exhibiting an uneven surface texture. 

PTT POY yams were textured by the false-twist method at 140 to 160 °C. Crimp development was almost twice as high as PET, with crimp contraction reaching about 50 %. When PTT yams with a high level of crimp contraction are knitted into stretch fabrics, the amount of stretch achieved is equivalent to PET stretch fabrics incorporated with 6 to 8 % of Spandex [89], In addition to stretch, PTT fabrics tend to have softer hand and better drape than PET. Since they do not absorb moisture like nylon, PTT fabrics also have a desirable dry touch and comfort. 

Finally, the fibers are textured for specific applications. They can be twisted, coiled, or even randomly kinked if they are to be used for carpet piling. More than half of the total carpet-fiber market is based on nylon staple and filaments. When nylon is to be blended with other fibers, the filament is cut into staple fiber—short pieces 3—15 centimeters in length— for subsequent spinning. 

A methoxylated polyamide 78 analogous to Nylon 6 was obtained in several steps fi om D-glucose [61, 63] through the preparation of a dimeric active ester of 6-amino-6-deoxy-2,3,4,5-tetra-(9-methyl-D-gluconic acid (49). This polyamide was highly crystalline, and gave resistant films with a spherulitic texture. 

Long-chain a,o)-dicarboxylic acids have been condensed with diamino-isohexides, forming linear polyamides suitable for producing fibers having a silklike texture and higher moisture-absorption properties than nylon-like polymers.206... 

Carrier properties. Carriers can be shaped and configured as films, fibers, planar surfaces, or spheres. Surface morphology, i.e., surface texture and porosity, can exert a decisive influence as can carrier materials the most important are inorganic materials such as ceramics or glass, synthetic polymers such as nylon or polystyrene, and polysaccharide materials such as cellulose, agarose, or dextran. 

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