Polyvinyl butyral (PVB) is a polymer compound and one of the most widely used chemical products among polyvinyl alcohol and its derivatives. Since its industrial production in my country in the early 1960s, decades of development and improvement have resulted in a relatively mature production process, equipment, and management system.PVB resins possess properties such as high tensile strength, strong adhesion, impact resistance, transparency, and optical clarity. PVB resins are used in general industrial coatings and wood coatings, weathering primers, ceramic substrates, composite materials, structural adhesives, and gravure or flexographic printing inks. They are particularly suitable for use as an adhesive film interlayer in laminated safety glass for automotive windshields and architectural safety glass.