Here at Texas Scottish Rite Hospital in Dallas we have a standard lay up and then we add or take away from that. Example I’m a BK and my socket is made up of 1 Dacron, 8 nyglass and 2 1″ strips of carbon to reinforce the distal plate.
My weight is 226 lbs.
I would be more than happy to fax you a copy of our lay ups so you could play we use more glass now than carbon. Do you want me to fax or e-mail them.
Thanks,
Robert Carlile, RTPO
Prosthetics Lab Supervisor
Texas Scottish Rite Hospital
2222 Welborn
Dallas, Tx 75219
214-559-7440
robert.carlile@tsrh.org
hi ben. i’d talk to the supplier where you purchase the carbon. they
should
be able to tell you what amount of lay ups are needed for a particular
weight
range. it’s going to depend on the make up of the carbon your using.
luke richards
Hi Ben
It is more important to consider the following with regards ot
lamination
as they all have an influence over the final strength:
Location within the socket wall and orientation of the fibers.
Stronger
fibres should be towards the surface and orientated in the direction
of
the load.
Percentage of resin remaining in the fibers (how much you string
out).
Difficult to quantify, but in general more is better
Shape of the socket (curvature). The smaller diameter it is the
thinner
the the walls can be.
Hope this helps
Ian Fothergill,
ifothergill@ossur.com
www.ossur.com
All I can tell you is that are standard layup on a person up to 240#’s
is: 1 layer of dacron on the proximal portion, (approx. 1-11/2 inches
distal to the PT bar), 2 layers of ny-glass in the same region as the
dacron, 2 layers of carbon over the entire length of the mold, & 2
layers of ny-glass over the entire length of the mold. The finish lam
consists of 2 layers of ny-glass over the entire limb.(whether endo or
exo, but flex-foot and the like require additional layups). The dacron
is not used for strength, but for thickness as this is the area most
likely to be adjusted. We have tried less material for lighter
individuals, but in the long run they do not stand up to the wear &
tear.(spider cracks & the like). For people over 240#’s we add 2
additional layers of carbon over the entire mold. By the way, we only
use epoxy resin. I realize that this does not really answer your
question, but I hope it helps you somewhat.
A Colleague,
E. Reed Coleman, C.P., L.P.O.
Cascade’s Carbon Component Class
carbon 2 glass and carbon 0-165 lbs
carbon 4 glass and carbon 165 to 200 lbs
carbon 2 glass carbon 2 glass carbon (double I-beam) 200 to 325
You can add a lot of strength with selective use of double I-beam,
using
strips of carbon in areas you know you will not cut out such as a
framed ak
socket. Do not use carbon tape use strips of carbon weave same as on
the
inside or outside.
Any additional info???
********* Thank you to all who helped****************
Ben Lawson RTO
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