| Identification | Back Directory | [Name]
RAYON | [CAS]
61788-77-0 | [Synonyms]
RAYON
RAYONFIBRES
Rayon fibers
Viscose rayon
Rayon,purified
PEG-40 SORBITAN PEROLEATE, RAYON | [Molecular Formula]
C18H32O16 | [MOL File]
61788-77-0.mol | [Molecular Weight]
504.437 |
| Chemical Properties | Back Directory | [Definition]
Generic name for a semisynthetic fiber
composed of regenerated cellulose as well as man-
ufactured fibers composed of regenerated cellulose
in which substituents have replaced not more than
15% of the hydrogen of the hydroxyl groups. Rayon
was first made | [Cosmetics Ingredients Functions]
VISCOSITY CONTROLLING
BULKING | [Uses]
Nonwoven fabrics, surgical dressings, mechan-
ical rubber goods, coated fabrics, felts and blankets,
blends with cotton for home furnishings, etc.
|
| Hazard Information | Back Directory | [Hazard]
Flammable, not self-extinguishing, moder-
ate fire risk.
| [Preparation]
Viscose rayon is obtained by reacting the hydroxy groups of cellulose with car- bon disulfide in the presence of alkali to give xanthates. When this solution is poured (spun) into an acid medium, the reaction is reversed and the cellulose is regenerated (coagulated). | [Industrial uses]
Rayon is a general name for artificial-silk textile fibers or yarns made from cellulose nitrate, cellulose acetate, or cellulose derivatives. In general, the name rayon is limited to the viscose, cuprammonium, and acetate fibers, or to fibers having a cellulose base. Other synthetic-fiber groups have their own group names, such as azlon for the protein fibers and nylon for the polymeric amine fibers, in addition to individual trade names.
Viscose rayon is made by treating the cellulose with caustic soda and then with carbon disulfide to form cellulose xanthate, which is dissolved in a weak caustic solution to form the viscose.
Rayons manufactured by the different processes vary both chemically and physically. |
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