Don, you forgot the 1 - 4 factors
LeRoy Cordes
AMA 16974
Chicago, IL
In God We Trust
On Tue, 28 Oct 2008 23:42:15 -0600 "Don DeLoach" <ddeloach_at_comcast.net>
writes:
> Is exposure to O2 really that bad? I did not know that. I still have
> a lot
> of rubber in cardboard boxes in the frig. I thought UV was the main
> concern.
>
> My understanding about refrigeration is that is slows vulcanization
> which
> means the rubber ages more slowly and therefore is usable for more
> years
> into the future.
>
> Mark (and any other rubber experts): If you had to assign relative
> (percent)
> importance to factors 1 through 4 below, what would they be?
>
> --Don D.
>
> -----Original Message-----
> From: Indoor_Construction_at_yahoogroups.com
> [mailto:Indoor_Construction_at_yahoogroups.com] On Behalf Of Mark
> Sent: Tuesday, October 28, 2008 9:29 PM
> To: Indoor_Construction_at_yahoogroups.com
> Subject: [Indoor_Construction] Re: Rubber storage
>
> --- In Indoor_Construction_at_yahoogroups.com, "Nick Ray" <lasray@...>
>
> wrote:
> >
> > It appears there is some debate over this topic. Most of people
> have
> > switched to freezer bags
>
> Yes!
>
> IMHO, the first ememy of rubber is 1) light, especially UV light
> (which may also may explain why office supply rubber bands are
> practically half-rotten when sold from clear plastic bags.) 2)
> oxygen exposure 3. excessive heat, especially over 100* F or so.
> and 4) time.
>
> I've used plastic freezer bags since 1993, and have noticed no
> excessive deterioration beyond the above suppposed factors. I used
> to
> sink all my bags in water to figure whether specific gravity was
> greater or less than water, since one FFer chemist in Australia used
>
> to claim that certain plastic bags outgassed bad chemicals yet
> others
> were safe, depending on whether or not they sunk or floated in
> water. But now I forget which was which (sinking vs. floating bags)
>
> and don't really care.
>
> And refrigeration doesn't hurt.
> Mark F1diddler
>
>
> -----
>
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LeRoy Cordes
AMA 16974
Chicago, IL
In God We Trust
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Received on Thu Oct 30 2008 - 08:04:49 CET