The basic principal is to have a layer(s) of carbon close to the
outside of
the lamination, and another layer(s) close to the inside. The thicker
these
layers are and the greater the distance between the two, the stronger
it will
be. Sandwiching carbon in between these inner and outer layers is a
waste of
mat’l — use something cheap and light weight to fill in between.
Sorry, I
don’t know specifics for a particular weight pt.
Troy Fink, CO
((( There Is a .doc file with this it can be found under part 3 )))
I have come up with this lay up schedule a long time ago and my techs
felt
it was way too conservative. They thought the weight classes for each
lay
up could be raised significantly and my lay up for heavy duty would
support
an elephant. I on the other hand felt it was better to be safe than
sorry
and, by the way, I have never had a socket failure to date with this
method.
Kevin Warner CP
Lloyd-Silber Orthopedics
Lancaster, PA USA
Dear Ben,
Talk to Malcolm at Endolite. They’ve done quite a bit of study on lamination and carbon fiber layups. Hope this helps.
Sincerely,
Ron LeFors, C.P..O.
Some years back DAW reported on the proper lay-up for various uses and
patient weights. To sum it up it basically stated that each lay-up
should be
an I-beam construction. That is; you start with nylon stockinet, then
add
the inner layer of carbon, kevlar or fiberglass you need for the size
and
activity of your patient, then separate the inner and outer layers with
standard or fiberglass stockinet. The outer layer of carbon, kevlar or
fiberglass should be exactly the same as the inner layer, then the
outermost
layer is covered with standard nylon stockinet. The heavier your
patient the
more carbon, kevlar or fiberglass you need and the wider the separation
layer between the two segments.
Good luck and I hope this helps.
Bob Brown, Sr, CPO, FAAOP
Hello Ben—How are things going?? Just got the e-mail this morning,
and
find it very interesting..I have a company that distributes Carbon
braid ,
Fiberglass ,Nylaglass, PVA Bags, Etc…., and would love an oppurtunity
to
help you out….
i’ve got some written liturature, about different layup methods, and
come
accross different stuff all the time….Just send your address back to
me and
I”ll be happy to get some info in your hands….
Great question—See Ya
George Gatewood CP CPed
Pro-Fab Supplies, INC.
The space between the carbon layers using nyglass produces an “I-Beam” effect for strength. We have followed these general layup guidelines for weight ratings, and it seems to work well.
2 carbon layers separated by 2 nyglass, safe up to 120 lbs.
” ” 4 ” 220 lbs
” ” 6 ” 300 lbs
With additional selectively placed reinforcements, (carbon or fiberglass) for especially active adults or particular components.
Hope this helps.
Mark Vukov CPO
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