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See these Head Trip Helmets brand Carbon Fiber Novelty Helmets for sale by clicking here.
Ensolite is an energy absorbing foam originally developed by NASA to
protect pressure vessels from damage. It has virtually 100% memory and
is waterproof.
Composite Craft has taken their carb31 fiber helmet to the next
level of safety. For added protection and comfort, the Polo style,
Extended 1/2 Shell, and Head Trip Helmets now come with the new
"Ensolite" energy absorbing foam liner.
This foam is much more impact resistant compared to the common foam
liners used in most helmets.If necessary, the removable cushioned
sizing pads can be cut for a custom fit or removed altogether.
All helmets are basically made the same way, a female mold is
gel-coated with either a clear or colored gel-coat then fibers are
layed into the female mold, resin is applied and the material rolled
out to remove as much air as possible. The part is then left to cure at
either room temperature or it's heated to accelerate the cure.
Although this is a good way to make a lot of helmets pretty quickly it
does not result in a shell that offers much in the way of structural
integrity compared to a high-pressure laminate. This is where Composite
Craft differs from the rest.
When talking about laminate structure and materials related to
non-pressure versus high pressure laminating, the difference is that
using high pressure versus no pressure controls the laminate and its
compaction. Compacting the fiber and injecting exactly the right amount
of resin results in a shell that far exceeds the shell produced with
no pressure. And having exactly the right amount of resin versus fiber
controls laminate structure. This is called fiber volume. In the very
best wet lay-up hand laminated helmet the best resin content versus
fiber volume is 50%. This means there are 50% resin and 50% fiber.
Resin really has no strength in comparison to the fiber. So you need to
control the resin content to a minimum versus fiber. Basically the
resin is there to keep the fibers in place
Composite Craft uses a modified resin transfer system, this
process involves basically the same process as the non-pressure
laminate, a female mold is sprayed with gel coat, Multiple layers of
fiber are put in the mold but then pressure is applied at 75psi inside
the mold. Resin is then injected in exactly the right amount and the
helmet is heated to cure. By injecting the resin we can achieve a 40%
resin to 60% Fiber ratio, which is optimum for helmet shells. The
result is a laminate that yields all the structural integrity that the
materials were meant to have.
Now that you know about the process you may be asking what's the
difference between Fiberglass, Carbon Fiber and Kevlar. Everyone knows
basically what fiberglass is, extruded glass. 95% of all helmets are
made from fiberglass be it mat (random fibers) or woven fabric. They
are all basically the same. One key factor is fiberglass is cheap.
Carbon fiber is made by superheating an acrylic fiber yielding high
strength to weight and high stiffness to weight properties. When
engineered properly Carbon Fiber composites can achieve the strength
and stiffness of metals at a significant weight savings, these two
factors are key to the manufacture of a helmet.
Kevlar is made by dissolving a polymer in a solvent and extruding
the fiber and then spinning. While Kevlar has properties similar to
Carbon Fiber it lacks compressive strength. The combination of 50%
Carbon Fiber and 50% Kevlar results in a laminate with flexural
strength about three times that of Kevlar alone.
Below is a comparison of typical fiber properties of some of the materials we use.
|
Material |
Stiffness (MSI) |
Tensile strength (KSI) |
Density (g/cc) |
| Fiberglass |
10 |
450 |
2.55 |
| Carbon Fiber |
42.3 |
770 |
1.78 |
| Kevlar |
13.9 |
800 |
1.44 |
By using Carbon/Kevlar and our high pressure laminating process we
can produce a helmet shell with far superior strength to weight ratio.
The stiffness (42.3 MSI) of Carbon Fiber being a contributing factor
to that strength and weight based on its density (1.78(g/cc)
Most helmets have a very cheap headliner material for the liner. We use an energy absorbing foam called Ensolite for
our liner, while still being comfortable it offers energy absorbing
properties that headliner material does not. Resulting in a small but
safe helmet.
Composite Craft is a Custom Helmet Manufacturer. We build each
helmet by hand - one at a time. No compromise is ever made in the
quality of the helmet.
See these Head Trip Helmets brand Carbon Fiber Novelty Helmets for sale by clicking here.
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