Klarinet Archive - Posting 000410.txt from 1999/04

From: Spiegelthal.Dave@-----.COM
Subj: [kl] Re: Plastics/Wood/Composites
Date: Wed, 7 Apr 1999 21:01:35 -0400

Dee Hays wrote, in part:
<There is no published data that shows that this version of
composite is more crack resistant than the standard ones used in the various
models of beginner instruments.>
I'm also a mechanical engineer, not a materials scientist per se, but have
done much material selection and some testing in the past, and I'd like to
clarify something (or perhaps further obfuscate it??) A "composite" material is
one which has fibers or particles of one material embedded/bonded into a resin
(solidified liquid) of another material. Examples include fiberglass,
graphite/epoxy composites, particle board, and Buffet Greenline clarinets.
However, most student clarinets (that I'm aware of) are NOT "composites", they
are merely molded plastic --- that is, they are all "resin" with no "filler".
As far as I know, there are no embedded fibers or particles in these instrument,
so they should not be classified as"composites" like the Greenlines. Please
correct me if I'm wrong.
Dave Spiegelthal
Calverton, VA

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