RE: [ATM] RE: How hot is your scope

["Donald Good" <donald.good@comcast.net>]

Actually, there are several materials or "systems" in the epoxy and
polyester groups used with fibers.  The one to use depends on the type of
fiber (fiberglass [several types], carbon fiber, Kevlar, and others), how it
is formed (hand layup, vacuum bagging, molds), how it is cured (room temp,
low heat, high heat), desired strength and stiffness, and finally, alergic
sensitivity of the craftsman.  If you want to use carbon fiber, then
investigate the different matrix systems designed to be used specifically
with CF.  Do not assume!!

Epoxy in bulk may be brittle.  But when used in combination with the fiber
for which it is formulated and in the proper fiber to matrix ratio, it is
extremely strong and durable.

Don

> -----Original Message-----
> From: atm-bounces@atmlist.net 
> [mailto:atm-bounces@atmlist.net] On Behalf Of Ellen Mackenzie
> Sent: Monday, October 11, 2004 9:12 PM
> To: atm
> Subject: [ATM] RE: How hot is your scope
> 
> There are two materials used with fibres, one is epoxy, and 
> the other with polyester. The polyester matrix is preferred 
> for most commercial application because it is more flexible.
> Epoxy when cured properly is very brittle and is unsuitable 
> for things like boat hulls, bathtubs etc.. You can't mistake 
> it because of it's sweet ester smell. 
> Is it possible that your scope was fabricated by a commercial 
> house that uses polyester as a matrix.
> 

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