Comments on: Oxygen gets into closed bottles http://www.winewisdom.com/articles/closures/oxygen-gets-into-closed-bottles/ Sally Easton Sat, 04 Feb 2012 04:56:09 +0000 http://wordpress.org/?v=2.8.6 hourly 1 By: Sally http://www.winewisdom.com/articles/closures/oxygen-gets-into-closed-bottles/comment-page-1/#comment-258 Sally Mon, 18 Jan 2010 18:06:04 +0000 http://www.winewisdom.com/?p=457#comment-258 Hello Eb, as far as I'm aware proprietary patents exist for all the different synthetic closures, which means disclosure of exact construction is unlikely. It's usually talked about in non-specific terms: food grade materials used; approximate shelf life, and more recently, oxygen transmission rates, etc. I'm not sure I can help you much more on that one, I'm afraid. Sally Hello Eb, as far as I’m aware proprietary patents exist for all the different synthetic closures, which means disclosure of exact construction is unlikely. It’s usually talked about in non-specific terms: food grade materials used; approximate shelf life, and more recently, oxygen transmission rates, etc. I’m not sure I can help you much more on that one, I’m afraid. Sally

]]> By: Dr. Eberhard Kunze http://www.winewisdom.com/articles/closures/oxygen-gets-into-closed-bottles/comment-page-1/#comment-256 Dr. Eberhard Kunze Wed, 13 Jan 2010 12:23:48 +0000 http://www.winewisdom.com/?p=457#comment-256 Dear Sally, having first time now come onto a Nomacorc closure (on a bottle, which I discarded the rest of because of poor taste) I tried to find out, what Nomacorc essentially is. But apparently nobody publishes any detail about the chemistry involved, and appart from having found out that it seems to be a kind of foamed polyethylene I am still totally in the dark. Considering that the amount of diffused oxygen has any chance to be smaller than the elution of any eventually enclosed by-product or additive to the synthetical cork material, I would be glad to read more about what the chemists in these plants actually do - if possible, from an indepentent source. With kind regards, Eb Dear Sally,
having first time now come onto a Nomacorc closure (on a bottle, which I discarded the rest of because
of poor taste) I tried to find out, what Nomacorc essentially is.
But apparently nobody publishes any detail about the chemistry involved, and appart from having
found out that it seems to be a kind of foamed polyethylene I am still totally in the dark.

Considering that the amount of diffused oxygen has any chance to be smaller than the elution
of any eventually enclosed by-product or additive to the synthetical cork material, I would be glad
to read more about what the chemists in these plants actually do – if possible, from an indepentent
source.
With kind regards,
Eb

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