Ethylene vinyl alcohol: Difference between revisions
→Industrial production: Added Chang Chun to list of producers |
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== Industrial production == |
== Industrial production == |
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Because of the high capital cost to built an EVOH plant, and the complexity of making a food grade product, only a few companies produce EVOH: |
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[[Kuraray]] produces EVOH resin under the name "EVAL," with 10,000 ton plant in Okayama, Japan; a 35,000 ton plant in the U.S. (near Houston, TX) under its subsidiary Kuraray America; and a 24,000 ton plant in Belgium under its subsidiary EVAL Europe.<ref>http://www.kuraray.co.jp/en/company/business/eval.html</ref> |
[[Kuraray]] produces EVOH resin under the name "EVAL," with 10,000 ton plant in Okayama, Japan; a 35,000 ton plant in the U.S. (near Houston, TX) under its subsidiary Kuraray America; and a 24,000 ton plant in Belgium under its subsidiary EVAL Europe.<ref>http://www.kuraray.co.jp/en/company/business/eval.html</ref> |
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Nippon Gohsei |
Nippon Gohsei produces EVOH under the trade name Soarnol. It has production sites in Misushima, Japan; La Porte, Texas in the USA; and Hull, England. <ref>[http://www.csr4u.co.uk/NGUK%20Case%20Study.htm Nippon Gohsei – The right strategy to get the results] www.csr4u.co.uk.</ref> |
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Chang Chun Petrochemical produces EVOH under the trade name EVASIN. It has a single site in Taipei, Taiwan. |
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== Use in medical applications == |
== Use in medical applications == |
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Revision as of 15:54, 28 August 2013
Ethylene vinyl alcohol (EVOH) is a formal copolymer of ethylene and vinyl alcohol. Because the latter monomer mainly exists as its tautomer acetaldehyde, the copolymer is prepared by polymerization of ethylene and vinyl acetate to give the ethylene vinyl acetate (EVA) copolymer followed by hydrolysis. The plastic resin is commonly used in food applications, and it has lately found application in plastic gasoline tanks for automobiles. Its primary purpose is to provide barrier properties, primarily as an oxygen barrier for improved food packaging shelf life and as a hydrocarbon barrier for fuel tanks. EVOH is typically coextruded or laminated as a thin layer between cardboard, foil, or other plastics. EVOH copolymer is defined by the mole % ethylene content: lower ethylene content grades have higher barrier properties; higher ethylene content grades have lower temperatures for extrusion.
Industrial production
Because of the high capital cost to built an EVOH plant, and the complexity of making a food grade product, only a few companies produce EVOH:
Kuraray produces EVOH resin under the name "EVAL," with 10,000 ton plant in Okayama, Japan; a 35,000 ton plant in the U.S. (near Houston, TX) under its subsidiary Kuraray America; and a 24,000 ton plant in Belgium under its subsidiary EVAL Europe.[1]
Nippon Gohsei produces EVOH under the trade name Soarnol. It has production sites in Misushima, Japan; La Porte, Texas in the USA; and Hull, England. [2]
Chang Chun Petrochemical produces EVOH under the trade name EVASIN. It has a single site in Taipei, Taiwan.
Use in medical applications
EVOH is used in a liquid embolic system in interventional radiology, e.g. in Onyx.[3] Dissolved in dimethyl sulfoxide (DMSO) and mixed with a radiopaque substance, ethylene vinyl alcohol copolymer is used to embolize blood vessels.
References
- ^ http://www.kuraray.co.jp/en/company/business/eval.html
- ^ Nippon Gohsei – The right strategy to get the results www.csr4u.co.uk.
- ^ Embolization of Intracranial Arteriovenous Malformations with Ethylene-Vinyl Alcohol Copolymer (Onyx). American Journal of Neuroradiology 30:99-106, January 2009.