Polyvinyl butyral pvb interlayer film is the resin that perepared from polyvinyl alcohol reacted with butyraldehyde. Polyvinyl butyral pvb interlayer film is usually implied in the situation that needs strong binding, toughness and flexibility. Polyvinyl butyral pvb interlayer film as a protective interlayer film, is often used to make automotive laminated glass and architectural laminated glass. Polyvinyl butyral pvb interlayer film has many properties: Impact resistance, great adhension, sound control, uv-radiation filtered, and good aging resistance.