Re: G10

• To: tesla-at-pupman-dot-com
• Subject: Re: G10
• From: "Reinhard Walter Buchner" <rw.buchner-at-verbund-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Mon, 21 Feb 2000 19:20:43 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hi Brian,

> Original Poster: "Brian H Le Page" <b.h.le-page-at-surrey.ac.uk>
> I have been trying to find out what the English equivalent name for
>G10 is. Nobody in the composites group here has heard of it.
>Could someone please post a description and specification.  All I
>have gathered so far is that it is a phenolic composite.  Can
>anyone confirm/deny this?  What is the reinforcement? What are
>it's mechanical properties?

It is made of fiberglass drenched in a resin. Have a look at
some PCBs out of a main frame etc. The (light) greenish color
is a dead give-away for G-10. It is very strong, yet remains
flexible. As a matter of fact there was some talk over here
in Europe of using this stuff instead of iron for leaf springs in
big trucks. The main advantage over steel is that if you overstress
steel it will snap in half. Not so with G-10, you will only snap a
few fiberglass strings at a (overload condition) time. If you have
a junk PCB made out of G-10, try and bend it. YouŽll be surprised
how far you can "fold" it before it snaps. If you look at the edges
of G-10, you can see the singular fibers, which are arranged in
a criss-cross pattern, giving additional strength in any loading
direction. AFAIK, G-10 is the universal name. You are probably
looking for a brand name. Sorry, canŽt be of any help there.

Main disadvantages of G-10:

- Expensive.
- Heck on machining tools.
- Makes a lot of dust. Do NOT cut, mill or otherwise
  machine this stuff w/o proper respiratory protection.


Coiler greets from Germany,
Reinhard

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