You are right , Glenn
Making a 2113 (or 2313) prepreg is no problem and it works fine as a prepreg 
BUT it makes a really awful laminate for the reasons you have stated.
 ----------
From: [log in to unmask]
To: [log in to unmask]; [log in to unmask]; Dave Heywood
Subject: re: RE: Re:FAB Prepreg style 2113
Date: 26 May 1997 09:54

<<File Attachment: ENVELOPE.TXT>>
     I'd be careful requiring 2113 or 2313.  If I remember right, and
please somebody correct me if I'm wrong, these two styles have unbalanced
weaves.  The filament weight in one direction is heavier than in the other 
(in

addition to the fiber count difference).  This has made it harder to run
through a treater, more broken filaments from weaving and impregnating
(results in etching problems), uneven movement for dimensional stability, 
and
different surface profiles in grain and fill.
     From the weavers end, I think it was being phased out and replaced by
a balanced weave, although I don't remember the number.

Glenn Pelkey
Quality/Reliability Engineer
Maxtek Components Corp.

[log in to unmask] Wrote:
|
| 2113 is used a lot in Europe where it more or less replaces 2125 as a 4 
mil
prepreg. It presses | maybe a smidgeon thinner but not much (depending on 
the
resin content favoured by your local | supplier). The only downside is that 
it

has almost the same thread count as 2116 and is therefore
| difficult to distinguish visually. this can lead to confusion and the odd
mistake among companies that | employ humans.
| Dave Heywood
| [log in to unmask]
|  ----------
| From: [log in to unmask]
| To: [log in to unmask]; Dave Heywood
| Subject: Re:FAB Prepreg style 2113
| Date: 21 May 1997 03:08
|
| We are after typical build uses of style 2113 prepreg.
|
| Any help would be appreciated.
|
| Regards,
| David Taylor
| Chief Engineer
| East Coast Printed Circuits

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