What happens when armored glass is shot?

When Ballistics Meets Science: What Happens When Armored Glass is Shot?

When discussing automotive armor, one of the most frequent questions is: What actually happens when armored glass takes a hit?

The answer is complex. It is not just about "thick glass," but rather a multi-layer system engineered to absorb, dissipate, and contain ballistic energy under international standards such as NIJ 01080, EN 1063, and NTC 5501.

In this article, we explain—from a technical standpoint—what occurs second-by-second when a projectile impacts certified armored glass.

1️⃣ Initial Impact: Energy Dissipation

When the projectile hits the first layer of float glass:

• A controlled fracture occurs.

• Kinetic energy begins to disperse radially.

• The projectile starts to deform.

The float glass used in ballistic systems maintains parallel surfaces and uniform thickness, allowing for a predictable and technical dissipation of the impact. This is the first key physical principle: load distribution through controlled fracture.

2️⃣ Intermediate Absorption: The Role of Polyurethane

After fracturing the first layer, the projectile encounters the ballistic polyurethane film:

• It absorbs a portion of the residual energy.

• It prevents splinters from detaching toward the interior (spalling).

• It significantly reduces the projectile's velocity.

  
  

This component is fundamental for anti-spall protection, a mandatory feature in certified glass. Without this layer, the glass could fragment dangerously toward the passengers.

3️⃣ Final Containment: High-Resistance Polycarbonate

The final barrier is H.C. Polycarbonate, a virtually unbreakable material:

• It stops the remaining projectile.

• It prevents penetration.

• It maintains internal structural integrity.

Polycarbonate combines low weight, high impact resistance, and optical stability. Here, the ballistic neutralization process is completed.

Does the glass break completely?

Yes and no.

Armored glass:

• ✔ Fractures on its outer layer.

• ✔ Maintains structural cohesion.

• ✔ Blocks the projectile (according to the protection level).

• ✔ Preserves operational visibility.

  
  

In fact, systems developed by Ballistic exceed tests of 5 consecutive impacts. This means they are designed to withstand multiple shots without immediate loss of protection.