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December 2008

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Subject:
From:
Joe Fjelstad <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Wed, 3 Dec 2008 15:37:41 EST
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Hi Paul 
 
I see that Rudy has already made a very important comment. There  is a 
recommendation out there from Du Pont. My vague recollection was under 20%  but 
would need to confirm (and for the operator less than 0.08%... ;-)
 
Cheers, 
Joe 
 
 
In a message dated 12/3/2008 12:15:21 P.M. Pacific Standard Time,  
[log in to unmask] writes:

Good  catch Joe...
I forgot about the alcohol...
Do you remember the amount  required?

Paul

Paul Edwards
Surface Art  Engineering



-----Original Message-----
From: TechNet  [mailto:[log in to unmask]] On Behalf Of Joe Fjelstad
Sent: Wednesday,  December 03, 2008 10:26 AM
To: [log in to unmask]
Subject: Re: [TN]  Stripping Magnet Wire

A quick caveat, etchability depends greatly on  the polyimide  formulation.
Addition of ethanol can improve etch rate  (and  possibly the operator's 
mood, if
the addition is made to him  as  well ;-)

Joe


In a message dated 12/3/2008 9:55:39  A.M. Pacific Standard Time,
[log in to unmask] writes:

If  you  can get a hold of it...

1 Molar KOH @ 60-80 C was used to  etch kapton  windows in TAB tape structures
a few years  ago...

Paul

Paul  Edwards
Surface Art  Engineering

-----Original Message-----
From:  TechNet  [mailto:[log in to unmask]] On Behalf Of Diamond, Patrick
Sent:  Tuesday,  December 02, 2008 11:14 PM
To: [log in to unmask]
Subject: Re:  [TN]  Stripping Magnet Wire

At my last company which was in the   aerospace industry, we used to use a
sodium hydroxide solution called   Novastrip 60 (industrial paint
stripper), heated to 104 Dec C. This  worked  extremely well on polyimide
wires even down to 0.012", had to  ensure it was  neutralised for 3 mins
in D.I. water after  exposure.  We used to strip  hundreds of coils a week
using this  method so we had a semi-automated  computer based machine and
a fully  enclosed tank for HSE reasons.
If you  want more info. Contact me  offline.

Pat Diamond

Harris  Systems
Winnersh  UK

-----Original Message-----
From: TechNet   [mailto:[log in to unmask]] On Behalf Of Kane, Joseph E (US
SSA)
Sent:  02  December 2008 15:28
To: [log in to unmask]
Subject: [TN] Stripping  Magnet  Wire


To remove polyimide insulation from 38 gage  magnet wire, we've  been
using a
chemical stripper (Lonco 504  paste), which is going  obsolete.

I saw something in the archives  about Insulstrip Jell from  Ambion, does
anyone
have other  recommendations, chemical, mechanical, or  other?

Joe Kane
BAE  Systems
Johnson City,   NY

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