Are Motorcycle Helmets Bulletproof
No. motorcycle helmets aren’t bulletproof instead it is bullet resistant. It isn’t made to stop or deflect a bullet. If one shot a gun at a motorcycle helmet, the bullet will pierce through it and your head also.
Military helmets are made in such a way that it can provide a platform for cameras or night visions in some cases. It saves the users head from any damage. These helmets aren’t also bulletproof.
A military helmet deflects a light caliber bullet. But it fails to stop a bullet. Normally military bullets are curved made to help deflect bullets.
This helmet helps with fragments and shrapnel, but it is surely not bulletproof. It saves head from injuries and concussions happened by nearby blasts.
Materials Used in Motorcycle Helmets
Motorcycle helmets are made from a foam layer, a shell, and padding. The shell prevents anything to enter inside the helmet. It disperses the effect across an expanded area.
Besides, the foam absorbs much impact as it can, that your head doesn’t. In conclusion, the soft padding ensures a nice fit against your head.
The main difference lies in the shell of the advanced helmet and basic helmets. On the other way, many helmets use same foam layers.
Some helmets use a variation of expanded polystyrene foam (ESP). It is lightweight and stiff, but crushable at the time of impact.
There are various densities of EPS in different locations with some upgraded helmets. It develops the standard of the helmet more. It may absorb the crash variously depending on the location and severity of the impact.
Thermoplastic is nothing but hot plastic. It is poured into a stack and cooled within a solid shell. This plastic is normally some form of polycarbonate.
Helmets demand more padding to decrease the possibilities of injury. So, thermoplastic helmets are heavier and larger than advanced lids. However, these helmets are very cheap as manufacturing is a bit easier.
Fiberglass shells are costlier than the plastic. It is because there is a pain to make the butt.
You should keep fiber cloth inside a mold, put in a resin. Then heat everything with a billion degrees. Do the same process again and again to get a weave pattern.
At last, you get a harder shell that is lightweight than plastic. Fiberglass is very brittle and prone to crack.
So, you have to be more careful about your helmet. You mustn’t drop it on the ground. However, a cracking helmet is a nice option. Its shell will absorb much of force before the foam layers come in contact with.
Fiberglass helmets don’t demand much foam padding. All these things make helmets smaller and lighter than the plastic lids.
Advanced Fibreglass Shells
These helmets are made from advanced fibers. You will be surprised to know that advanced fiber is mixed with a resin or other substances. It isn’t essential to multiple layering steps.
The manufacturers use the very simple method to make a helmet. They have managed a perfect balanced of all materials.
The final result is a safety helmet having lots of features like usual fiberglass; weight is about 80%.
How to make motorcycle helmets bulletproof?
The shell of the helmet is built from AS4/ polyphenylene prepreg tape. This material is greatly used as it is tough, stiff, durable and rust free in the wide temperature range.
It refers that PPS keeps more than double the modulus of other 2 substitute materials. Polyamide 6 and polypropylene.
Aramid/Thermoplastic Polyurethane Anti-Ballistic Layer:
Aramid/Thermoplastic Polyurethane Anti-Ballistic Layer: The system adds a biaxial weave of aramid with a film of thermoplastic polyurethane laminated on one side.
To make a perfect bulletproof surface, 39 piles are required. The usual thickness of every ply is 0.23mm (0.0091 in).
Therefore the thickness of the ballistic layer is 9.01 mm (0.355 in). As this is folding equipment, the width of the final product doesn’t remain the same.
The experiment has done well with woven fabrics (6). If a curve is made by the tensioned cross-ply material, there is a possibility to the get up of the angle and fibers.
The cause is that the elongation of aramid is very low (2.4 percent (5)). Above the helmet and the shear angle remains 90 degrees.
The shear angle preserves nearly 90-degree temperature though it varies along with the oblique.
The density perfect for the ballistic material is 730–1220 g/m2 (approximately 0.15–0.25 psf). The usual PPS tape or carbon has an areal heaviness of 386 g/m2 (around 0.079 psf/ply), of 3 plies of tape maximum.