Textile fibers chemical

Use Reduction of various organic compounds purification of aldehydes and ketones, iodine, sodium hydrosulfite antiseptic source of sulfurous acid, particularly in brewing analytical chemistry tanning bleaching straw and textile fibers chemical preservative in foods (except meats and other sources of vitamin B,). 

Binding CD to textile fibers chemically or by adsorption opens new ways for the preparation of perfumed textiles, with slow release of the perfume. The immobilized (wash-fast) cyclodextrin can be loaded with perfumes, or insect repellents, which will be released only slowly as a result of th reaction of body heat and released humidity (perspiration). Simultaneously, these hosts can bind distasteful smelling components of perspiration (deodorizing effect). 

The properties of textile fibers may be conveniently divided into three categories geometric, physical, and chemical, as shown in Table 4. 

Most textile fibers are hygroscopic at least to some extent, and therefore capable of absorbing moisture from the atmosphere, which is a direct reflection of chemical stmcture. Textile fibers vary from those that may be considered hydrophilic to those that are essentially hydrophobic (8—10). 

Asahi Chemical Industries (ACl, Japan) are now the leading producers of cuprammonium rayon. In 1990 they made 28,000 t/yr of filament and spunbond nonwoven from cotton ceUulose (65). Their continuing success with a process which has suffered intense competition from the cheaper viscose and synthetic fibers owes much to their developments of high speed spinning technology and of efficient copper recovery systems. Bemberg SpA in Italy, the only other producer of cuprammonium textile fibers, was making about 2000 t of filament yam in 1990. 

R. W. Litde, Flame Proof ng Textile Fibers, American Chemical Society Monograph Series 40, American Chemical Society, Reinhold, N.Y., 1947. 

Continuous recuperative furnaces employing metallic recuperators (heat exchangers) have been in use since the 1940s. Operation of these furnaces is simplified and the combustion process is more precisely controlled no reversal of air flow causes temperature variations. The recuperator metal must be caretiiUy selected because of chemical attack at high temperature. Recuperative furnaces are often used in the production of textile fiber glass because they maintain a constant temperature. 

Polybenzimidazole (PBI) Fibers. Poly(2,2 -(y -phenylene)-5,5 -bisbenzimidazole) [25734-65-0] is a textile fiber marketed by Hoechst-Celanese (11) which does not form Hquid crystalline solutions due to its bent meta backbone monomeric component. PBI has exceUent resistance to high temperature and chemicals. 

A nonwoven fabric can be assembled by mechanically, chemically, or thermally interlocking layers or networks of fibers, filaments, or yams. Fabrics made from textile fibers in this manner have been classified as dry-laid nonwovens. 

The properties of textile fibers can be divided into three categories geometric, physical, and chemical, which can be measured with available methods (15—17). Perceived values such as tactile aesthetics, style appearance of apparel fabrics, comfort of hosiery, as weU as color, luster, and plushness of carpets are difficult to quantify and are not always associated with the properties of the fiber, but rather with the method of fabric constmction and finishing. 

J. E. Netdes, Handbook of Chemical Specialties Textile Fiber Processing, Preparation, and B leaching,] ohxs Wiley Sons, Inc., New York, 1983, pp. 391—457. 

Textile Fibers Department and Organic Chemicals Department, E. I. du Font de Nemours and Co., Wilmington, Delaware. 

Preparation of ethylene glycol for antifreeze and synthetic textile fibers (60%), hospital sterilant (15%), surfactants (10%), other chemicals (10%). 

Acrylic textile fibers are primarily polymers of acrylonitrile. It is copolymerized with styrene and butadiene to make moldable plastics known as SA and ABS resins, respectively. Solutia and others electrolytically dimerize it to adiponitrile, a compound used to make a nylon intermediate. Reaction with water produces a chemical (acrylamide), which is an intermediate for the production of polyacrylamide used in water treatment and oil recovery. 

Uses It is used as a chemical raw material for a myriad of everyday products such as plastics, detergents, textile fibers, drugs, dyes, and insecticides. It is also found in gasoline with other aromatic hydrocarbons. 

Virtually all of the nitrobenzene made is converted to aniline. The most important use of aniline is for the preparation of 4,4 -diaminodiphenyl methane (commonly called methylenedianiline or MDA), an intermediate to one of the main ingredients used to make polyurethane foams and rubber. Aniline is also used to make other rubber chemicals, textile fiber intermediates, dyes, and pharmaceuticals. 

Dyes are classified in accordance with either the chemical constitute or their application to textile fibers for coloring purposes. Table 1 gives this classification... 

Surface Modifications. Basic photopolymer chemistry is also being used for the surface modification of films, textiles fibers, and many other organic-based materials (104). Some of the novel applications of photopolymer technology to surface modification include the design of cell repellent treatments and in photografting of various chemical functionality onto the surface of materials to improve color retention, enhance the adhesion of antistatic chemicals or to improve staining resistance. 

The activities described in this section intend to minimize or avoid the release of chemicals into the stream wastewater by substitution, optimization, reuse, and recycling. Besides a lowering of the costs for following up general wastewater treatment, benefits due to minimization of chemical consumption are intended. As there are various specific problems arising from the particular treatment steps applied for different fibers, this section concentrates on the most important problems. Table 2 gives an overview of the annual production of textile fibers [10]. 

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