Rayon fiber

== Description ==
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.
For identification of rayon fibers, see http://cameo.mfa.org/wiki/Category:FRIL:_Rayon
[[[SliderGallery rightalign|aaiRAYON.jpg~FTIR|diacetate400m.jpg~SEM|tenasco500m.jpg~SEM|viscose250m.jpg~SEM]]]
== Synonyms and Related Terms ==
rayon fibre (Br.); rayonne fibre (Fr.); artificial silk; art silk; fiber silk; viscose; cupro fiber; modal; polynosic; fibra de rayón(Esp.)
Product names: Absorb; Beau-Grip; Coloray; Durvil; Enkaire; Enkrome; Fibro® [Acordis Cellulosic Fibers]; Zantrel; Fortisan; Avril®; Dynacor®; Enkal®; Nupron®; Rayflex®; Suprenka®; Tyrex®; Tyron®; 
== Risks ==
* Combustible, burning rapidly with a yellow flame and smell of burnt paper. It produces minimal ash. 
* Deteriorates slowly in sunlight. Resistant to most insects except silverfish.
== Physical and Chemical Properties ==
*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) 
*Melting Point = 150 (dec)
*Density = 1.46-1.54
== Additional Information ==
G.Cook, Handbook of Textile Fibres:II. Man-made Fibres, 5th edition, Merrow Publishing Co., Durham, England, 1984, p.9.
== Comparisons ==
== Additional Images ==
File:76 v.rayon Vincel 200X.jpg|Viscose rayon Vincel
File:76 v.rayon Vincel 200X pol.jpg|Viscose rayon Vincel
File:77 c.rayon Vincel 200X pol.jpg|Viscose rayon
File:77 c.rayon2 Vincel 200X.jpg|Viscose rayon
File:Rayon 200x CP.POL.jpg|Rayon fibers
== Comparisons ==
== Resources and Citations ==
* Hoechst Celanese Corporation, Dictionary of Fiber & Textile Technology (older version called Man-made Fiber and Textile Dictionary, 1965), Hoechst Celanese Corporation, Charlotte NC, 1990
* S.R.Trotman, E.R. Trotman, Textile Analysis, J.B. Lippincott Company, Philadelphia, 1932
* Rosalie Rosso King, Textile Identification, Conservation, and Preservation, Noyes Publications, Park Ridge, NJ, 1985
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Marjory L. Joseph, Introductory Textile Science, Holt, Rinehart and Winston, Fort Worth, TX, 1986
* J.Gordon Cook, Handbook of Textile Fibres:II Man-made Fibres, Merrow Publishing Co. , Durham, England
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 654
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
Category:Materials database