At 10:12 AM 8/14/2005, you wrote:
Not that I want to beat this horse any longer, but I must disagree
with my friend Tony and point out the error of trying to measure
thread (other than single strand mono) with calipers. This was tried
before and led to equally erroneous results. Because both threads
are polyester, simple algebra gives the EQUIVALENT diameter from the
denier ratings:
10/0 Gudebrod .0681mm
14/0 sheer .086mm
So the EQUIVALENT diameter of the 10/0 is about 80% of the 14/0 and
the x-sectional area, 64%.
One can arrive at these percentage results without all the algebra:
simply take the ratio of the denier values.
Ah well, while I'm here I should point out a small error in Mark
Delaney's post about comparing denier ratings of materials of
different densities. While he was correct that density must be
accounted for, the EQUIVALENT diameter varies as a square root of
the density. So, in his example of comparing a 50 denier GSP thread
to one of Kevlar, the EQUIVALENT diameter ratio is actually 1.25, not 1.55.
What's this mean for you and me? A 50 denier GSP has the same
EQUIVALENT diameter as a 72 denier polyester; of course the GSP is
almost 4 times stronger.
As a quick poll for my own interest, does anyone use Kevlar these
days? I haven't put a wrap of it on a hook for at least 5 years.
Now my head hurts,
Cheers,
Paul
I still use Kevlar -- for tying Glo-Bugs. Not that I use
them, I just get requests to tie them. McDonalds straws beware!!!
-->Garry
