A manufactured fiber composed of regenerated cellulose in which substituents have replaced no more than 15% of the hydrogens of the hydroxyl groups (Federal Trade Commission definition). Rayon was the first major commercial synthetic fiber. There are three primary fiber production methods for rayon. The first, developed in 1890, was the cuprammonium process (see cupro fiber). The second, and most widely used process, called viscose, was developed in 1892. Viscose rayon can be further processed to form high tenacity and high wet modulus rayons (see modal and polynosic fibers). The third method for making rayon fibers is to saponify cellulose acetate fibers (see acetate rayon). Rayons are used for woven and nonwoven fabrics, rubbers, felts, tire cords and cellophane.
Synonyms and Related Terms
rayon fibre (Br.); rayonne fibre (Fr.); artificial silk; art silk; fiber silk; viscose; cupro; modal; polynosic; Absorb; Beau-Grip; Coloray; Durvil; Enkaire; Enkrome; Fibro® [Acordis Cellulosic Fibers]; Zantrel; Fortisan; Avril®; Dynacor®; Enkal®; Nupron®; Rayflex®; Suprenka®; Tyrex®; Tyron®;fibra de rayón(Esp.)
Degrades in strong alkalis, acids and undiluted bleaches. Resistant to dry cleaning solvents. Filaments are smooth with striations; cross sections are circular with serrated edges. Tenacity = 2.0-2.6 g/denier (dry); 1.0-1.5 (wet); Moisture regain = 11-16.6%; Elongation = 15-13% (dry); 20-40% (wet)
Rayon burns rapidly with the smell of burnt paper. It produces minimal ash.
|Melting Point||150 (dec)|
Hazards and Safety
Combustible burning rapidly with a yellow flame. Deteriorates slowly in sunlight. Resistant to most insects except silverfish.
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