Re: [Killietalk] Shipping boxes; was NEW Flat rate priority mail boxes

["Erny May" <emay1 at wi_rr.com>]

That's how heat packs work! The compound in them essentially oxidizes 
releasing
hear. If you seal them in an airtight container they don't heat.

Erny


----- Original Message ----- 
From: "L. Langione" <lonlangione at suscom_net>
To: "killifish discussion list" <killietalk at aka_org>
Sent: Wednesday, December 08, 2004 2:54 PM
Subject: Re: [Killietalk] Shipping boxes; was NEW Flat rate priority mail 
boxes


> Some heat pack need atmospheric air to keep on generating heat. When you 
> put
> them into enclosed boxes, they only heat until they use up the available
> air.
>
>                    Lonny Langione   Dover, PA    AKA #09035
> ----- Original Message ----- 
> From: "Kenneth Combs" <KCombs at mergerx_net>
> To: <killietalk at aka_org>
> Sent: Wednesday, December 08, 2004 1:09 PM
> Subject: [Killietalk] Shipping boxes; was NEW Flat rate priority mail 
> boxes
>
>
>> Funny,
>> I just mailed out a few homemade boxes and just saw those new Flat rate
>> priority mail boxes this weekend...neat!
>>
>> Anyway, just so happens my dad was a packaging engineer, I thought I had
>> "picked up" a few things from him; so I made a few boxes last weekend
>> using those 1" foam sheets from Home Depot (a "6pack" of 4ea 4'x2'
>> sheets sells for $5ish I think)...
>>
>> - I placed a thermometer in one of my "homemade boxes" along with a bag
>> of warm water, I set it outside overnight and checked the temp in the
>> morning: Overnight temps dropped into the 30's and the thermometer
>> inside the box read about 48F...
>> While not the most "scientific" test, the cheapo thermometer and 10hrs
>> of exposure to temps under 40F did give me some clue how poorly
>> insulated a "home-made" box can be (I even glued the foam, sealed the
>> box corners, et)...
>>
>> -I've done similar "test" using those "standard" tropical fish boxes:
>> the short square one (approx 18" X 18" x10" I think) and the rectangular
>> type (18" x 10" x 8" I think)...Anyway, those are not much better if at
>> all...
>>
>> IMO, the best boxes are the "cubicle" ones you typically get from
>> hospitals or pharmacies, et(1.5" thick Styrofoam & 12x12x12..I
>> think)...those from Omaha Steaks are not bad either, both types seem
>> insulate a lot better than std "fish boxes"...
>>
>> BTW, IME, I've found assorted "Heat packs" to be of inconsistent
>> quality, it seems the those less than 36hrs get hotter, while "some"
>> 60hr HP barely even get warm...either way, I've never received a
>> shipment where ANY heat pack felt even the slightest bit warm upon
>> arrival..not saying they don't work, just I'd rather put more faith in
>> the box insulation...
>>
>> Anyway, if you ship fish a lot, this is not the type of thing to take
>> "my word for it", the whole matter is a worthy experiment to try
>> yourself//// try peanuts, shredded paper, heat packs, et...see what
>> happens.
>>
>> KC
>>
>>
>> To join the AKA see http://www.aka.org/pages/join.html
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>
>
> To join the AKA see http://www.aka.org/pages/join.html
> Archives are at http://fins.actwin.com/killietalk/
> 




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