, also known simply as triacetate
, is manufactured from cellulose
. 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.
Triacetate, whose chemical equation is [C6
, was first 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
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
. As the filaments emerge from a spinneret
, the solvent
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.
As a Fibre
Triacetate fibres have a crenate
- Shrink resistant
- Wrinkle resistant
- Easily washable
- Generally washable at high temperatures
- Maintains creases and pleats well
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
- Ironable up to 200 °C
- Pleated garments are best hand laundered. Most other garments containing 100% triacetate can be machine washed and dried
- Articles containing triacetate fibres require very little special care due mainly to the fibre's resistance to high temperatures
As a film