[time-nuts] Thunderbolt stability and ambient temperature

Didier Juges didier at cox.net
Sun Jun 14 20:30:28 EDT 2009


Here in Florida, we routinely store water in prevision of the next big one.

Plastic water bottles (any brand) start looking funny (shrunk) after a few
months, and downright scary (as in: you don't want to drink from THAT) after
a year or so.

It seems the gallon jugs do somewhat better than the smaller bottles. I had
jugs that still looked OK after a year, but not good after two. The pastic
seems much thicker, and maybe it slows down the process?

It's been like that for as long as I have lived here, i.e. since 1985. I do
not know if it is related to the climate. It makes no appreciable difference
if the water is stored in the garage (no A/C) or in the house.

Didier KO4BB

> -----Original Message-----
> From: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] On Behalf Of Thomas A. Frank
> Sent: Saturday, June 13, 2009 12:16 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Thunderbolt stability and ambient temperature
> 
> More to the point, you will be disappointed to find the bottles will  
> NOT last that long.
> 
> Cleaning out the cupboard recently, I can across some bottled water  
> that had 1998 date codes.  Several had leaked, but one was still  
> intact enough to show the likely problem.  It would appear that over  
> the past 10 years, the gases dissolved in the water migrated through  
> the plastic (or the cap seal), resulting in a vacuum forming in the  
> bottle.  This distended the bottles and caused structural failure.
> 
> Either that, or the water caused the plastic to shrink.
> 
> Glass would probably fair better.
> 
> Tom Frank, KA2CDK
> 





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