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Laminated Curved Glass vs. Toughened Glass: Which One is More Impact Resistant?

by:Liaoyuan Glass     2023-11-10

Laminated Curved Glass vs. Toughened Glass: Which One is More Impact Resistant?


Glass is one of the most commonly used materials in various industries. It is extensively used in architectural designs, automobile manufacturing, and household applications. When it comes to glass, there are different types available, each with its own unique properties. Two such commonly compared types of glass are laminated curved glass and toughened glass. Both offer excellent strength and durability, but which one provides better impact resistance? In this article, we will dive deep into the characteristics of each type, exploring their features, benefits, and limitations to determine which one is more impact resistant.

Understanding Laminated Curved Glass

Laminated curved glass is a specialized type of glass that is widely used in modern architecture. It is created by sandwiching a layer of polyvinyl butyral (PVB) between two or more glass sheets. This layer of PVB acts as an adhesive that holds the glass sheets together, making it more elastic and resistant to impact. The curved shape adds aesthetic appeal and allows for innovative architectural designs.

1.1 Benefits of Laminated Curved Glass

Laminated curved glass offers several benefits, including:

Enhanced Safety: In the event of an impact, the glass may crack, but it remains intact thanks to the interlayer. This reduces the risk of injury from shattered glass, as the fragments remain adhered to the PVB.

Sound Insulation: The adhesive layer in laminated curved glass helps to reduce external noise, making it an ideal choice for buildings located in noisy environments.

UV Protection: The PVB layer in laminated curved glass provides protection against harmful UV radiation, which can damage furniture, floors, and other objects exposed to sunlight.

1.2 Limitations of Laminated Curved Glass

While laminated curved glass offers many advantages, it also has certain limitations:

Thickness: The additional layer of PVB makes laminated curved glass thicker than other glass types, which may limit its use in certain applications where thickness is a constraint.

Cost: Due to the manufacturing process, laminated curved glass is generally more expensive than other glass options.

Exploring Toughened Glass

Toughened glass, also known as tempered glass, is created through a special heating and rapid cooling process called tempering. This process increases the strength and impact resistance of the glass, making it suitable for various applications. Toughened glass can be flat or curved and is widely used in industries such as automotive, construction, and furniture.

2.1 Benefits of Toughened Glass

Toughened glass offers several advantages that make it a popular choice:

High Strength: Toughened glass is much stronger than regular glass, providing superior impact resistance. It is approximately four to five times stronger than standard annealed glass.

Temperature Resistance: Toughened glass has excellent resistance to thermal stress, allowing it to withstand high temperatures without breaking.

Safety: In case of an impact, toughened glass shatters into small, granular pieces instead of sharp shards, reducing the risk of severe injuries.

2.2 Limitations of Toughened Glass

Despite its numerous benefits, toughened glass also has a few limitations:

Limited Alterations: Once toughened, the glass cannot be cut or modified. Any alterations must be made before the tempering process.

Uneven Breakage: While toughened glass is designed to break into small pieces, it may result in uneven patterns of breakage, making it difficult to predict the exact fragmentation during an impact.

Impact Resistance Comparison between Laminated Curved Glass and Toughened Glass

To determine which glass type is more impact resistant, let us compare their performance:

3.1 Testing Methods

Various standardized tests measure the impact resistance of glass. Two commonly used tests are the drop ball test and the impact test using a pendulum.

3.2 Results

When subjected to impact tests, both laminated curved glass and toughened glass show excellent resistance. However, the behavior of each type during impact is different.

Laminated Curved Glass: Upon impact, the glass may crack, but the interlayer keeps the fragments together. This prevents the glass from shattering, providing enhanced safety.

Toughened Glass: Toughened glass shatters upon impact but does not break into sharp shards. The small granular pieces reduce the risk of injury.

Applications and Conclusion

Both laminated curved glass and toughened glass have their own areas of application:

Laminated curved glass is widely used in:

1. Modern architecture, such as curved glass facades and roofs.

2. Automotive industry, for curved windshields.

Toughened glass finds its use in:

1. Architectural applications, like frameless glass doors and windows.

2. Automobile industry, for side and rear windows.

3. Furniture industry, for glass tabletops and shelves.


In conclusion, both laminated curved glass and toughened glass offer excellent impact resistance. Laminated curved glass provides enhanced safety due to its ability to retain the glass fragments upon impact. Toughened glass, on the other hand, shatters into small granular pieces, reducing the risk of injury. The choice between the two depends on the specific requirements of the application. It is recommended to consult with experts or engineers to determine the most suitable glass type based on factors such as safety, aesthetics, and budget constraints.

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