Lay up part one

Lay up part one

Ben

8/6/2002

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

Ill 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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