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April 1997

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From:
"Paul Stolar" <[log in to unmask]>
Date:
Wed, 23 Apr 97 08:33:19 CDT
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     How many cycles will it have to survive in its lifetime?


______________________________ Reply Separator _________________________________
Subject: Kapton
Author:  [log in to unmask] at Internet
Date:    4/22/97 8:28 PM


Hello friends,
 I have a question about the material Kapton.  Does this material
deteriorate due to flexing (if used in a PC board).  I want to use it to 
wrap around a hinge on a small door that will need to close (where the 
board will bend 180 degrees) and be able to open (where the board will 
bend about 90 degrees).  So the board will need to bend repeatedly 
between 90-180 degrees.  Will this hurt the board?  
 Second, can you just put a crease in the board and end up with the
board in an accordian like shape that would relieve the stress of the 
opening and shutting?  Does this compromise the integrity of the board 
and the wiring?  If anyone has any experience in this, I would 
appreciate some suggestions.  Also if you knew of a better technique or 
material, I would be happy to hear them.  Thanks a lot.
    Matt Leary
    Newgrange Technologies
    Boston, MA
    (617) 338-4171
     
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