Blended with cotton

The original yams were marketed as silk substitutes for use in apparel, hosiery, lace, home furnishings, ribbons, braids, and in a whole range of fabrics using blends with cotton or wool yams. As the end uses expanded beyond silk replacement, the harsh metallic luster of the yam proved disadvantageous and dull "matt" fibers had to be developed. Oil dulling was invented (11) in 1926, and an improved method using titanium dioxide was developed (12) in 1929. 

Considerable effort is being made (ca 1993) to develop satisfactory flame retardants for blended fabrics. It has been feasible for a number of years to produce flame-resistant blended fabrics provided that they contain about 65% or more ceUulosic fibers. It appears probable that blends of even greater synthetic fiber content can be effectively made flame resistant. An alternative approach may be to first produce flame-resistant thermoplastic fibers by altering the chemical stmcture of the polymers. These flame-resistant fibers could then be blended with cotton or rayon and the blend treated with an appropriate flame retardant for the ceUulose, thereby producing a flame-resistant fabric. Several noteworthy finishes have been reported since the early 1970s. 

In a recent detailed evaluation of Cl Fluorescent Brightener 393 on polyester, this product was incorporated into the polymer melt. The prebrightened fibre was blended with cotton and fabric knitted from these yarns was scoured and bleached. It was demonstrated... 

These are the polycondensation products of dlcarboxylic acids and diols. Dacron or terylene Is the best known example of polyesters. It is manufactured by heating a mixture of ethylene glycol and terephthallc acid at 420 to 460 K In the presence of zinc acetate-antimony trioxlde catalyst as per the reaction given earlier. Dacron fibre (terylene) is crease resistant and is used In blending with cotton and wool fibres and also as glass reinforcing materials in safety helmets, etc. 

Fiber blending is a very common method of reducing the flammability of flammable fibers. Polyester is usually blended with cotton and this polycotton, if has lower than 50% polyester content can pass the simple vertical strip flammability test. With higher polyester content, sometimes the blended fiber is more flammable than the individual components. This is called wicking effect where the cotton acts like a wick, holding the polyester component together, which bums. Cotton-nylon blend are also quite commonly used to reduce flammability of cotton. 

Thus Dacron is called a polyester. By itself or blended with cotton, Dacron is widely used in fibers for the manufacture of clothing. 

Imparts a cashmere-type hand to acrylics or tri-acetates and their blends with cotton, nylon or polyester. 

Softener for cottons and blends with cotton. Allows excellent sewability. 

Use Blended with cotton or flax in toweling and heavy fabrics, twine, cordage, packing. 

Use Blended with cotton, for wash-and-wear fabrics blended with wool, for worsteds and suitings packaging films, recording tapes, soft-drink bottles. 

Use Nonwoven fabrics, surgical dressings, mechanical rubber goods, coated fabrics, felts and blankets, blends with cotton for home furnishings, etc. 

The wide range of natural and man-made fibres provides many combinations to create new effects with desirable properties. Strength, wearibility and crease recovery are the main properties responsible for synthetic fibres becoming established for blends with cotton, viscose and wool. The acrylics are also in much demand for such blends, while polyamide fibres and triacetates are of secondary importance. 

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... 

Products and Uses A filament blended with cotton to produce wash-and-wear fabrics. It is blended with wool to produce worsteds and suitings. Used for recording tapes, soft drink bottles and for surgical grafting material. 

Low-pilling fibers are common used on a la scale espedally in blends with cotton, wool, and othor synthetic fibers, for the manufacture of soft fabrics, knits, pQe, and in othm areas. 

In 1970, an acid-dyeable polypropylene fiber was described [158]. It was claimed that this fiber could be dyed like nylon and could produce one-batch union shades in blends with cotton and acrylics. The dye site in this fiber was present as a microfilament dispersed within the polypropylene. These microfibers extended to the surface of the fiber and water was readily absorbed in order that acid dyes could penetrate at a reasonable rate to react with the basic dye sites. Acid-dyeable polypropylene fiber products have been available from Phillips [159] and, from Polyolefin Fibres Engineering (PFE) Ltd. [160]. PFE has also introduced a bicomponent fiber readily dyeable with disperse dyestuffs [161]. 

Another important advantage of true HWM fibers is their better resistance to caustic soda. Although garments made of rayon are not normally subjected to exposure to strong caustic solutions, fabric preparation, such as dyeing, bleaching, etc., sometimes requires caustic treatment. In HWM blends with cotton, fabrics are sometimes mercerized or treated... 

A number of new cotton like rayons shown in Figure 10.91 was introduced to the textile market during the 1970s. One of these developments in HWM technology was the result of research at ITT Rayonier Research Laboratories in Whippany, New Jersey [284-287]. A chemically crimped fiber called Prima, with an unusual lobed cross section, HWM properties, low 56 5, and more than adequate strength gives more bulk and cover to fabrics. It can be blended with cotton or polyester or in heavier denier with wool. It is also used 100% in the tube-sock hosiery business in direct competition with cotton [288]. 

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