PVB film in Bulletproof Glass
Composition of Bulletproof Glass
Overview
Bulletproof glass is a special type of safety glass used to protect people and property from high-energy impacts such as gunfire or explosions. Its structure is composed of multiple layers and materials, including glass, plastic layer, and laminated film.
Glass Layer
The first layer of bulletproof glass is the glass layer, which is usually made of ordinary or tempered glass. This layer mainly plays a supporting and protective role and can withstand general impact.
Plastic Layer
The second layer is the plastic layer, which is typically made of materials such as polycarbonate (PC) or polyethylene. This layer mainly absorbs energy, slows down external impact, and prevents glass from shattering.
Laminated Film
The third layer is the laminated film, which is used to bond the different layers of bulletproof glass together. There are multiple options for the interlayer material used in bulletproof glass, including Polyvinyl Butyral (PVB), Ethylene-vinyl acetate (EVA), and Thermoplastic Polyurethane (TPU).
PVB Film Interlayer
PVB film is the most commonly used interlayer material in bulletproof glass due to its excellent adhesion, optical clarity, and energy absorption capabilities. It can also hold the glass together even after it has been shattered, reducing the risk of injury from flying glass shards.