When it comes to EVA film for laminated glass, two common types are used: Thermoset EVA film and Coupling EVA film. Both serve the purpose of enhancing the strength, safety, and durability of laminated glass, but they differ significantly in terms of internal structure, performance, and applications.
1. Thermoset EVA Film for Laminated Glass: Superior Stability
Thermoset EVA film is known for its stable structure that forms a pattern similar to a spider’s web during the lamination process. This intricate internal structure is crucial for the film’s performance, providing high levels of stability. One of the standout features of thermoset EVA film is that it does not melt or deform, even when exposed to heat after lamination. This ensures that the EVA film for laminated glass maintains its integrity and performance in a variety of environmental conditions.
Benefits of Thermoset EVA Film:
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Excellent thermal stability, resistant to heat even above 70°C.
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High durability, making it suitable for both indoor and outdoor applications.
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Ideal for use in demanding environments where stability is crucial, such as automotive glass, architectural glass, and safety windows.
2. Coupling EVA Film for Laminated Glass: Lower Melting Point
On the other hand, Coupling EVA film has a different internal structure. During the lamination process, this film forms a “zero cross-linking” structure. Unlike thermoset EVA, coupling EVA film begins to melt at temperatures above 70°C, which can lead to potential risks in high-temperature environments.
Risks of Using Coupling EVA Film:
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Susceptible to softening and deformation when exposed to temperatures above 70°C.
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Not recommended for outdoor applications where exposure to varying temperatures and direct sunlight is common.
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Best suited for controlled indoor environments where temperature fluctuations are minimal.
3. Choosing the Right EVA Film for Laminated Glass
When selecting EVA film for laminated glass, it’s essential to consider the intended application. Thermoset EVA film offers superior durability and is ideal for outdoor and high-performance applications where heat stability and structural integrity are vital. On the other hand, Coupling EVA film is more suitable for indoor uses where temperature stability is less of a concern.
In conclusion, while both types of EVA film for laminated glass offer unique advantages, thermoset EVA film is the more versatile option for applications requiring long-term performance and heat resistance.
