When comparing cast acrylic and glass, cast acrylic is generally stronger in terms of impact resistance, but glass has higher hardness and scratch resistance. Here's a detailed comparison:
Strength & Durability
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Cast Acrylic:
- Impact Resistance: Cast acrylic is up to 17 times stronger than glass of the same thickness, making it far less likely to break or shatter upon impact.
- Shatterproof: If it does break, acrylic tends to crack rather than shatter into dangerous shards.
- Flexibility: Acrylic is more flexible than glass, allowing it to absorb some force without breaking.
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Glass:
- Hardness: Glass is more rigid and less prone to scratching compared to acrylic.
- Brittleness: While strong under compression, glass is brittle and more likely to shatter under impact.
Weight
- Cast Acrylic: It’s about half the weight of glass, making it easier to handle, transport, and install.
- Glass: Heavier and more cumbersome, especially for larger projects.
Scratch Resistance
- Cast Acrylic: Scratches more easily than glass, though it can be polished to restore clarity.
- Glass: Naturally more resistant to scratches, making it ideal for applications where surface integrity is critical.
Applications
- Cast Acrylic: Commonly used for nameplates, signage, display cases, and windows where strength and lightweight properties are important.
- Glass: Preferred for applications where hardness and scratch resistance are critical, like tabletops and high-end windows.
Conclusion
For strength and impact resistance, cast acrylic is the stronger material. However, if you prioritize scratch resistance and a more premium, weighty feel, glass may be the better choice. For nameplates, cast acrylic is often preferred due to its combination of durability, lightweight properties, and versatility in customization.