comfisherman
Well-Known Member
I have a 20 oz. carbon/kevlar stock from MPI. (I'm not sure if MPI is even in business these days).
But, the point is, I believe the kevlar is what gives a carbon stock its stiffness. Carbon kinda flexes. So, I believe a lot of carbon fiber stocks have kevlar in certain places for stiffness and strength. My MTI stock is not only light but incredible stiff. I feel fortunate to have it.
Kind of think you have those flipped from my experience with different composite materials in boat building. We don't use kevlar in much of anything but back in the day guys used it a lot in laminates that were prone to potentially having flexing in them. Usually paird up with a vinylester resin. In the 90s it was more common because at the time carbon was three times more than Kevlar which was double or triple what fiberglass cloth was.
With China's wholesale adoption to carbon production carbon prices are now on the level with Kevlar and it's probably a better all-around material it's at least easier to deal with on repairs and sanding finish work. Harsh reality is the core material as well as cloth reinforcement is probably less critical than the resin used.
If u were a betting man mpi used kevlar with a carbon skin to aide in finish work. Kevlar fibers don't lend themselves to sanding.
I'm the short bus of composites building heavy slow glass boats, but have seen a lot of the high end vehicle/bike molders at trade shows and they are on another level. The beartooth 44 looks like a multi piece bladder mold oven cure design. Very cool tech but an expensive setup, makes for a very consistent product vs say a hand layed split mold like a mcswirly.
Tldr... some cool stuff in some cool shapes we live in awesome stock buying times.