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Ultra-high molecular weight polyethylene (UHMWPE) is widely used in the manufacture of bulletproof plates due to its high strength, low density, impact resistance and other characteristics, and has become an important choice for modern lightweight protective materials.

Advantages of UHMWPE in the field of bulletproof

Lightweight

The density is only 0.93-0.98 g/cm³, which is 7-9 times lighter than steel and 15-20% lighter than Kevlar, greatly reducing the weight of bulletproof equipment and improving the mobility of soldiers or vehicles.

High impact resistance

UHMWPE has extremely high energy absorption capacity, with an impact strength of up to 2.6KJ/m², which can effectively absorb and disperse the kinetic energy of bullets and prevent penetration.

Corrosion resistance and environmental resistance

It is not affected by moisture, ultraviolet rays, and chemicals. Unlike Kevlar, which will degrade its performance due to water absorption, it is suitable for special conditions such as maritime operations and hot and humid environments.

Strong fatigue resistance

UHMWPE sheets can withstand impacts multiple times without breaking or deforming, which increases the service life of bulletproof equipment.

Structure and manufacturing process of UHMWPE bulletproof plates

① Structural design

Single-layer UHMWPE fiber laminate: suitable for soft bulletproof vests, light and flexible.

Composite bulletproof plates (UHMWPE + ceramic/metal): used for NIJ III/IV level protection, can effectively disperse the kinetic energy of bullets and improve penetration resistance.

② Production process

Fiber lamination technology:

Using high-pressure and high-temperature lamination technology, UHMWPE fibers are arranged in multiple layers to improve impact resistance.

Hot pressing:

Through resin impregnation + high-temperature hot pressing, the overall strength and toughness of the material are enhanced.

Nano-enhancement technology (Graphene / Carbon Nanotubes):

In recent years, some UHMWPE bulletproof materials have been combined with reinforcing agents such as graphene and carbon nanotubes to increase strength and reduce thickness.

4. UHMWPE vs. other bulletproof materials

Summary:

UHMWPE is suitable for lightweight protection applications, while ceramics and metal armor are suitable for high-strength protection (such as tanks, fixed fortifications).

With the same protection capabilities, UHMWPE is lighter than Kevlar and is not affected by moisture, making it more suitable for high humidity or marine environments.