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Revision as of 12:26, 15 February 2012 editBeetstra (talk | contribs)Edit filter managers, Administrators172,031 edits Saving copy of the {{chembox}} taken from revid 473938656 of page Cellulose_triacetate for the Chem/Drugbox validation project (updated: '').		Latest revision as of 23:28, 21 November 2023 edit InternetArchiveBot (talk | contribs)Bots, Pending changes reviewers5,379,674 edits Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.9.5
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			{{refimprove|date=September 2017}}
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	| ImageFile = cellulose triacetate.png		| ImageFile = cellulose triacetate.png
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	| IUPACName =		| IUPACName =
	| OtherNames = 2,3,6-Tri-O-acetyl cellulose; cellulose triacetate polymer; triacetylcellulose		| OtherNames = 2,3,6-Tri-O-acetyl cellulose; cellulose triacetate polymer; triacetylcellulose
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			'''Cellulose triacetate''', '''triacetate''', '''CTA''' or '''TAC''' is a chemical compound produced from ] and a source of ] esters, typically ]. Triacetate is commonly used for the creation of ] and ]. It is chemically similar to ]. Its distinguishing characteristic is that in triacetate, at least "92 percent of the ] groups are ]."<ref>] definition</ref> During the manufacture of triacetate, the cellulose is completely acetylated; whereas in normal cellulose acetate or ], it is only partially acetylated. Triacetate is significantly more ] than cellulose acetate.
			==History==
			Triacetate, whose chemical formula is <sub>n</sub>, was first produced commercially in the U.S. in 1954 by ]. ] was a manufacturer of CTA until March 15, 2007. For almost 3 years, ] was the only manufacturer. In 2010, ] announced a 70% increase in cellulose triacetate output at its Kingsport, Tennessee manufacturing site to meet the increasing demand for the chemical's use as an intermediate in the production of polarized films for ]s.<ref>{{Cite news |title=Eastman increasing cellulose triacetate capacity |agency=Associated Press |date=November 3, 2010 |newspaper=timesnews.net |url=http://www.timesnews.net/article.php?id=9027424 }}</ref><ref>{{Cite journal |title=Eastman to Boost Cellulose Triacetate Capacity at Kingsport |date=November 1, 2010 |author=Lindsey Bewley |journal=] |url=http://www.chemweek.com/markets/engineering_plastics/polyacetal/Eastman-to-Boost-Cellulose-Triacetate-Capacity-at-Kingsport_30657.html }}</ref>
			==Production==
			Triacetate is derived from cellulose by ''acetylating'' cellulose with ] and/or ]. ] converts hydroxyl groups in cellulose to ]s, which renders the cellulose polymer much more soluble in organic solvents. The cellulose acetate is ] in a mixture of ] and ] for ]. As the filaments emerge from a ], the ] is ]d in warm air, in a process known as dry spinning, leaving a fibre of almost pure triacetate.
			A ] process called ''S-Finishing'' or surface ] is sometimes applied to acetate and triacetate ]s using a ] 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 ].
			==Applications==
			===As a fibre===
			Triacetate fibres have a ] ].
			====Characteristics====
			*Shrink resistant
			*]
			*Easily washable
			*Often washable at high temperatures
			*Maintains creases and pleats well
			====Usage scenarios====
			Triacetate is particularly effective in clothing where crease or pleat retention is important, such as skirts and dresses.
			In the 1980s triacetate was also used with ] to create shiny ]s. The fabric was smooth and shiny on the outside and soft and fleecy on the inside.
			====General care tips====
			*] up to 200&nbsp;°C
			*Pleated garments are best hand laundered. Most other garments containing 100% triacetate can be ] and dried
			*Articles containing triacetate fibres require little special care due mainly to the fibre's stability at high temperatures
			===As a film===
			{{Main|Safety film}}
			====Characteristics====
			*Resistant to ], ], ], and most common ]s
			*Films have hard ] surfaces
			*Excellent ]
			*High ]
			*Easily ]d, coated, folded, and ]
			*] prone to degradation known as ]
			====Usage scenarios====
			*] films for ]s
			*Specialized ] ]
			*Specialized ]
			*]
			*Production of animation ]s
			*]
			*Face screens
			===As a semipermeable membrane===
			====Usage scenarios====
			*] through ]. The membrane may consist of a blend of cellulose acetate, diacetate and triacetate.
			==See also==
			* ]
			* ]
			* ]
			==References==
			{{Reflist}}
			==External links==
			*
			*
			*
			*
			* {{Webarchive|url=https://web.archive.org/web/20050306050126/http://www.celaneseacetate.com/textile_glossary_filament_acetate.pdf |date=2005-03-06 }}
			*
			]
			]
			]