PVB film is defined as a glass interlayer film that can be used in various end-use industries due to its different chemical properties. These films and sheets have special properties including impact resistance, clarity, elasticity, and high tensile strength. These properties make sheets and films suitable for the production of safety glass.
PVB has found its short-term growth application in the laminated glass market. The main application of polyvinyl butyral is as an interlayer in laminated safety glass for architectural purposes and automotive windshields.
Compared to alternatives such as ethylene-vinyl acetate (EVA), PVB has higher manufacturing and processing costs. PVB materials have been the reference material for laminated glass in the construction and transportation industries for many years.
PVB is gaining momentum in the manufacture of thin-film solar PV modules. PV circuits are formed on glass sheets using thin film deposition and patterning techniques. The two layers, the PVB layer and the second glass (called the back glass), are then placed directly on the circuit. This laminate encapsulates the circuit and protects it from environmental conditions. PVB back sheets offer a range of properties as it has good impact resistance and is considered a cheaper alternative to tedlar-based back sheets. In addition, the optical properties of PVB are better than EVA, and the adhesion of PVB to photovoltaic cells is also better than EVA.