PVB is the abbreviation of Polvinyl Butyral. PVB membrane processing complex, only the United States, DuPont, Solutia and Japan stagnant water, such as a handful of multinational companies have the technology in the world, and in our market have been monopolized by foreign products. With the amount of increased safety laminated glass, PVB membrane market is rapidly expanding. Laminated glass is sandwiched between two layers of glass in the middle layer of PVB membrane via composite pressurized, heated and made of special glass. Laminated glass is not only excellent optical performance, but also has puncture-resistant, resistant to high and low impact, noise, insulation, UV resistance, high temperature weather and other special properties, widely used in national defense, transportation, construction, decoration and other industries.