Description
Rayon produced from pure cellulose dissolved in an ammonium solution of copper oxide. The process for making cuprammonium fibers was discovered in 1890 by Louis Despeissis in France. Two years later, a company in Germany began using the process to produce filaments for lightbulbs. However, cupro rayon was soon replaced by viscose rayon, and the process was not revived until 1919 by J.P. Bemberg. Cuprammonium rayon fibers are white, transparent and very silklike. It does not have striations or markings. Cupro is made into chiffons, satins, nets, and other sheer fabrics (Cook 1984).
Synonyms and Related Terms
cuprammonium rayon; cupro fibre (Br.); fibras cuproamoniacales, rayón (Esp.); cupro vezel (caprama) (Ned); Bemberg; cupra rayon; rayon; Cuprama; Cupresa;
Other Properties
Soluble in hot dilute and cold concentration acids. Insoluble in most organic solvents. Fiber is smooth with no striations. Cross section is circular. Tenacity = 1.7-2.3 g/denier (dry); 1.1-1.135 (wet); Elongation = 10-17 % (dry); 17-23% (wet); Moisture regain = 11-12.5%.
Hazards and Safety
Sunlight slowly causes degradation and loss of strength.
Additional Information
G.Cook, Handbook of Textile Fibres:II. Man-made Fibres, 5th edition, Merrow Publishing Co., Durham, England, 1984.
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Last updated on: 6/12/2009 10:47:57 AM
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