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March 2003

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Date:
Tue, 25 Mar 2003 15:14:07 +0530
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hello techies,

Lately we are observing laminate voids & resin recession in some of our
boards
the problem has not become severe but it is in the increasing trend

well , to give some info
We have oil heated vacuum assisted presses
our heat rise rate is 2.5 deg per min
we are using kiss pressure of 50 psi for 10 mins before going into full
pressure
we are observing the problems in all the constructions irrespective of
style of prepreg

the only change what we have made is removal of the post baking what we
were doing after re-lamination? will it make any impact
i went through the archives but couldn't find any satisfactory answer

any suggestions?remedies?links?references?.......

cheers,
Madhu






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