Re: Re: Carbon fiber cloth for Treger's vp prop hub?

From: Phedon Tsiknopoulos <phedon21t_at_yahoo.com>
Date: Sat, 8 Jan 2011 01:29:38 -0800 (PST)

Thanks Tapio. Your definition proves once and for all that the epoxy in the
prepreg results in a heavier component than just TOW (loose fibers with nothing
applied to them) and Duco, Testors or Ambroid cements which weigh considerably
less than even thinned down epoxy resin. I wouldn't even think of autoclaving my
3.3 lb. balsa wood. Case closed. Ciao,
                                                                                                  
 Phedon




________________________________
From: Tapio Linkosalo <tapio.linkosalo_at_iki.fi>
To: Indoor_Construction_at_yahoogroups.com
Sent: Fri, January 7, 2011 10:48:31 PM
Subject: Re: [Indoor_Construction] Re: Carbon fiber cloth for Treger's vp prop
hub?

 
On 8.1.2011 4:00, Phedon Tsiknopoulos wrote:

> May be you can define for me what really is prepreg. To my knowledge it
> is TOW containing a resin that has to be heated to 100 degrees F. in
> order for it to cure.

To my understanding, pre-preg is fibres (typically cloth) that has been
impregnated with matrix (resin, typically epoxy), but then put to
freezer before the matrix hardens. So when using pre-preg, you do not
need to mix the resin and apply it to the cloth, but you just simply
take the roll of the pre-preg, cut the desired parts, ally them to the
mold and autoclave the whole thing until the resin has cured. This
avoids the difficult part of mixing the resin and applying the proper
amount of it to get the right fiber-to-resin ratio in the laminate.

-Tapio-




      
Received on Sat Jan 08 2011 - 01:29:44 CET