Mylar Has Infinite Thermal Conductivity -- Denier

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  • Bret Cahill
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  10 years ago
  Sat, Jul 14, 2012 6:57 PM

Mylar "blankets" are NOT "blankets" in spite of the popular name!

You know of some definition agreed upon by scholarly types at ASME or
NAE?

A
> million "hits" on Google does not make them insulators.

You think mylar has infinite thermal conductivity?
Bret Cahill

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  • dlzc
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  10 years ago
  Sat, Jul 14, 2012 8:59 PM

Dear Bret Cahill:

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The heat shield on an exhaust system is metal. It is a conductor, and it a= lso is not a blanket.
Mylar "blankets" provide an intermediate heat transfer surface, one with ve= ry low absorptivity (if they have the metal film coating). The also stop f= orced convection from reaching across the "blanket". The only thing they d= o not do particularly well is provide a high resistance to conduction.
Two out of three heat transfer methods getting a nod, is pretty good.
David A. Smith

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  • Bret Cahill
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  10 years ago
  Tue, Jul 17, 2012 3:12 AM

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You know of some definition agreed upon by scholarly types at ASME or NAE?

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You think mylar has infinite thermal conductivity?
Bret Cahill

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Bret Cahill

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  • alien8752
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  10 years ago
  Tue, Jul 17, 2012 6:19 AM

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Are we talking about the so-called "Space Blankets"?
They are useful for reflecting heat not because they're made of mylar. It's the thin film of aluminum that does the heat-reflecting. Mylar is used because it's very tear-resistant.
Mark L. "sorry if I gave the game away too soon" Fergerson

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  • bjacoby
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  10 years ago
  Tue, Jul 17, 2012 1:25 PM

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Don't worry about Bret. He is just having a semantic attack over the word "blanket". He's now trying to "prove" that a copper plate is a "blanket".

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  • Bret Cahill
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  10 years ago
  Wed, Jul 18, 2012 1:34 AM

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You dodged the question.
Here, try again:
You think mylar has infinite thermal conductivity?
This time no dodgin' 'n dodgin'

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  • bjacoby
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  10 years ago
  Wed, Jul 18, 2012 2:09 AM

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And you think a copper plate is a "blanket"?
You really don't care how much you embarrass yourself in public, do you?

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  • Bret Cahill
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  10 years ago
  Wed, Jul 18, 2012 2:51 AM

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You think copper has infinite thermal conductivity?
You think mylar has infinite thermal conductivity?
This time no dodgin' 'n dodgin'

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Bret Cahill

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  • alien8752
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  10 years ago
  Wed, Jul 18, 2012 6:08 AM

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I noticed the wrong question appeared to be asked.

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Certainly not. Mylar's thermal properties are pretty much irrelevant to how Space Blankets work.
Perhaps it would help if you didn't post the middle of a thread from another group into sci.physics. I have no idea who you were questioning, or what went before.
Mark L. Fergerson

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