When comparing polycarbonate and Perspex (acrylic) for security applications, such as windows, barriers, or protective screens, the key differences come down to impact resistance, strength, and durability. Here’s a breakdown:
🔒 1. Impact Resistance
- Polycarbonate:
- Extremely impact resistant—up to 250 times stronger than glass and far superior to acrylic.
- Can withstand hammer blows, attempted break-ins, and even gunfire in some grades (e.g. bullet-resistant polycarbonate).
- Best choice for high-security settings.
- Perspex (Acrylic):
- Stronger than glass (~10x), but much weaker than polycarbonate.
- Will crack or shatter under heavy impact.
- Suitable for moderate-security use, like shop displays or low-risk public barriers.
🛡️ 2. Breakage Behaviour
- Polycarbonate: Bends or dents rather than breaking. Resists shattering even under force.
- Perspex: Can crack or splinter, potentially creating sharp edges — a risk in safety or security applications.
🔥 3. Fire and Chemical Resistance
- Polycarbonate: More heat-resistant and has better fire-retardant properties. Tends to self-extinguish.
- Perspex: Can ignite more easily and burns faster.
🏗️ 4. Weight and Workability
- Both are lighter than glass and easy to cut and shape.
- Acrylic (Perspex) is easier to machine and polish for aesthetics.
- Polycarbonate is tougher to cut cleanly but better for functional or security-first applications.
💰 5. Cost
- Polycarbonate is more expensive than Perspex.
- But the added security and durability may justify the cost in high-risk environments.
✅ Use Polycarbonate If You Need:
- Maximum impact resistance
- Anti-vandalism or bullet resistance
- Riot-proof or forced entry-resistant glazing
- Long-term outdoor durability
✅ Use Perspex (Acrylic) If You Need:
- Clear, visually appealing panels with moderate strength
- Indoor or low-risk applications
- Lower cost with good aesthetics
🏁 Conclusion: For security purposes, polycarbonate is the superior choice due to its unmatched strength and impact resistance. Perspex may be fine for cosmetic or general-use panels, but it doesn’t hold up under force like polycarbonate does.