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If it is Mylar film (sounds like it is a vacuum metalized Mylar) it will start to shrink when exposed to about 300F and will start to melt between 350F and 400F. Mylar is Dupont's trade name for orient Polyester (PET.) Vacuum metalizing deposits the thin layer of aluminum.
Joe
----- Original Message ----- From: "Chad Robinson" <crj@lucubration.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, July 24, 2006 9:18 PM
Subject: [FlyRotary] Re: More cooling Tests
Bulent Aliev wrote:
Hi Bob, the stuff you are using I think it is Mylar coated fiberglass. If it is close to the exhaust pipes, it may melt the coating? Friend of mine bought some from Spruce. I put the propane torch on it and the coating melted instantly.
You can tell Mylar film because even a match will do that. It's just poly film with a thin (basically painted or sprayed on) coating of aluminum. 99% plastic. Worthless for insulation near any form of heat source, and almost always labeled as "flammable".
But, Buly, a propane torch is over 3000degF. Way above the 1000F Bob quoted for his material. Not a very fair test, is it? =)
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