Editing Lyocell (section)

{{Short description|Regenerated cellulose fibre made from dissolving pulp}}
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[[File:Lyocell Vital fabric.jpg|thumb|upright|Mattress with Lyocell as cover material]]
[[File:Lyocell.jpg|thumb|upright|Label of a coat containing Tencel (a brand of Lyocell)]]

'''Lyocell''' is a [[Fiber#Semi-synthetic fibers|semi-synthetic fibre]] used to make textiles for clothing and other purposes.<ref>{{Ullmann |first1=Hans |last1=Krässig |first2=Josef |last2=Schurz |first3=Robert G. |last3=Steadman |first4=Karl |last4=Schliefer|first5=Wilhelm|last5=Albrecht|first6=Marc|last6=Mohring|first7=Harald |last7=Schlosser |title=Cellulose |date=2002 |doi=10.1002/14356007.a05_375.pub2 }}</ref> It is a form of regenerated cellulose made by [[dissolving pulp]] and [[dry jet-wet spinning]]. Unlike [[rayon]], which is made by the more common [[Rayon#Viscose method|viscose]] processes, Lyocell production does not use [[carbon disulfide]],<ref name="brief">{{cite journal |date=2018 |title=Regenerated cellulose by the Lyocell process, a brief review of the process and properties :: BioResources |url=https://bioresources.cnr.ncsu.edu/resources/regenerated-cellulose-by-the-lyocell-process-a-brief-review-of-the-process-and-properties/ |journal=BioRes}}</ref><ref name=thesis>{{cite thesis |last1=Tierney |first1=John William |title=Kinetics of Cellulose Dissolution in N-MethylMorpholine-N-Oxide and Evaporative Processes of Similar Solutions |date=2005 |url=https://trace.tennessee.edu/utk_gradthes/2553/ }}{{pn|date=April 2025}}</ref> which is toxic to workers and the environment.<ref name=Blanc>{{cite news |last1=Swan |first1=Norman |last2=Blanc |first2=Paul |title=The health burden of viscose rayon |url=http://www.abc.net.au/radionational/programs/healthreport/the-health-burden-of-viscose-rayon/8286870 |work=ABC Radio National |date=20 February 2017}}</ref><ref>{{cite news |last1=Nijhuis |first1=Michelle |title=Bamboo Boom: Is This Material for You? |url=https://www.scientificamerican.com/article/bamboo-boom/ |work=Scientific American |date=June 2009 }}</ref><ref name=brief/> Lyocell was originally trademarked as Tencel in 1982.  

"Lyocell" has become a [[Generic trademark|genericised trademark]] used to refer to the Lyocell process for making cellulose fibres.<ref name=thesis/><ref name=merge/> The U.S. [[Federal Trade Commission]] defines Lyocell as "a fiber composed of cellulose precipitated from an organic solution in which no substitution of the [[hydroxy group]]s takes place, and no chemical intermediates are formed". It classifies the fibre as a sub-category of rayon.<ref>{{Cite web |url=http://www.ecfr.gov/cgi-bin/text-idx?SID=bd623b0d99d64f680f4d2b376e0c4d06&node=16:1.0.1.3.27.0.12.7&rgn=div8 |title=16 CFR 303.7(d) |website=ecfr.gov }}</ref>