KK-

TEFZEL insulated wire should be more resistant to "cold flow" failure, but I
don't have anything backing this up.

A favorite wire here is MIL-W-22759/33, which uses a modified ETFE
[Ethylene-tetrafluoroethylene], or TEFZEL, insulation.


for more info try

http://www.dupont.com/teflon/chemical/

and contact some wire manufacturers:

http://www.nationalwire.com/index.html

http://www.alphawire.com/index.html

Regards,

Michael Alderete
Aerojet


KK Chin wrote...
------------------------------

Date:    Mon, 11 Oct 1999 11:33:14 -0700
From:    KK Chin <[log in to unmask]>
Subject: Teflon and Tefzel Wire

Dear Technet friends,

We've been using tefzel (a modified teflon) insulated wires in our
transformer
assemblies. Some people are concerned that the teflon's cold-flow property
would
end up in shorts between windings where there are pressure points. My
questions
are:

- Is tefzel better than the unmodified teflon in this respect?
- How is the cold-flow characteristic quantified?
- Where can I find the "cold-flow index" of the materials?

Yours sincerely

K.K. Chin
Artesyn Technologies
Fremont, CA

------------------------------

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