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Cellulose triacetate, also known simply as triacetate, is manufactured from cellulose and acetate. Triacetate is typically used for the creation of fibres and film base. It is similar chemically to cellulose acetate, with the distinguishing characteristics being that in triacetate, according to the Federal Trade Commission definition, at least "92 percent of the hydroxyl groups are acetylated." During the manufacture of triacetate the cellulose is completely acetylated whereas in regular cellulose acetate or cellulose diacetate, it is only partially acetylated. Triacetate is significantly more heat resistant than cellulose acetate.
Additional recommended knowledge
Triacetate was first the produced commercially in the U.S. in 1954 by Celanese Corporation . Mitsubishi Rayon Co., Ltd. is the only company that still produces the fiber. Eastman Kodak formerly manufactured cellulose triacetate. They discontinued this product on March 15, 2007.
Triacetate is derived from cellulose by combining cellulose with acetate from acetic acid and acetic anhydride. The cellulose acetate is dissolved in a mixture of dichloromethane and methanol for spinning. As the filaments emerge from a spinneret, the solvent is evaporated in warm air, in a process known as dry spinning, leaving a fibre of almost pure triacetate.
A finishing process called S-Finishing or surface saponification is sometimes applied to acetate and triacetate fabrics using a sodium hydroxide solution. This removes part or all of the acetyl groups from the surface of the fibres leaving them with a cellulose coating. This reduces the tendency for the fibres to acquire a static charge.
CAS number 9012-09-3
As a Fibre
Triacetate fibres have a crenate cross section.
Particularly effective in clothing where crease or pleat retention is important, such as skirts and dresses.
In the 1980s triacetate was also used with polyester to create shiny tracksuits which were very popular at the time. The material was very smooth and shiny on the outside and soft and fleecy on the inside.
General Care Tips
As a film
Categories: Synthetic fibers | Acetates | Cellulose
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Cellulose_triacetate". A list of authors is available in Wikipedia.|