A single thick sheet can stop a bullet, but it is the bullet resistant laminates — layered constructions of polycarbonate and acrylic — that stop the round and keep the glazing light and clear at the same time. The layering is not decoration; each layer plays a role in absorbing and containing the impact.
How the layers work together
In a laminate, alternating layers of polycarbonate and acrylic each handle part of the threat: the hard acrylic face slows the projectile and resists scratching, while the tough polycarbonate layers absorb the energy and stop penetration, and the interlayers hold the whole panel together so it does not shatter into fragments. The result is a panel that is lighter than solid glass of equal rating and stays transparent. The exact layer stack and thickness are tuned to the target level and tested as a complete panel.
Designing the layer stack
- Match the layer stack to the target UL 752 level.
- Use the hard acrylic face for abrasion resistance and clarity.
- Use the polycarbonate layers to absorb energy and stop penetration.
- Test the complete laminate, not just the individual layers.
For how these panels are built, see laminated polycarbonate multilayer glazing, and for the material debate, polycarbonate versus glass for security glazing.
Frequently Asked Questions
Q: Why layer acrylic and polycarbonate in a ballistic laminate?
A:Each layer handles part of the threat — the hard acrylic face slows and resists abrasion, the polycarbonate absorbs energy, and the interlayers stop fragmentation.
Q: Is a laminate better than a solid thick sheet?
A:For equal rating, a laminate is often lighter and controls spall better, but the whole stack must be tested together to know it works.
For a ballistic or security glazing quote with the threat level and panel size, email oversales@rpplexiglass.com with the location, threat and panel dimensions.