EVA (Ethylene Vinyl Acetate) and PVB (Polyvinyl Butyral) are two different types of interlayers used in laminated glass. The main difference between EVA and PVB laminated glass lies in their properties and applications. Here are some key distinctions:
Composition: EVA is a thermoplastic material made from a copolymer of ethylene and vinyl acetate, while PVB is a thermoplastic resin made from polyvinyl butyral.
Clarity: EVA has a higher transparency compared to PVB. It provides a clearer view through the glass, making it suitable for applications where visual clarity is crucial, such as storefronts, museums, or art galleries.
UV Resistance: EVA has better resistance to ultraviolet (UV) rays compared to PVB. It offers enhanced protection against UV radiation, preventing fading or damage to objects behind the glass, such as artwork or furniture.
Sound Insulation: PVB has superior sound insulation properties compared to EVA. It effectively reduces noise transmission, making it ideal for applications where noise reduction is important, such as in buildings located near busy roads or airports.
Safety and Security: Both EVA and PVB laminated glass provide safety and security benefits by holding the glass together when shattered. However, PVB has been traditionally used in applications requiring higher safety standards, such as automotive windshields, due to its excellent impact resistance and ability to prevent glass from shattering into sharp pieces.
Manufacturing Process: EVA laminated glass is typically manufactured using a heat and vacuum process, while PVB laminated glass is made using a heat and pressure process. The different manufacturing techniques can affect the overall quality and performance of the laminated glass.
Ultimately, the choice between EVA and PVB laminated glass depends on the specific requirements of the application. EVA is often preferred for applications that prioritize visual clarity and UV resistance, while PVB is commonly used in applications where safety, security, and sound insulation are crucial.
