It is a composite glass product made of two or more pieces of glass with one or more layers of organic polymer interlayer in between. After special high-temperature pre-pressing (or vacuuming) and high-temperature and high-pressure process treatment, the glass and the interlayer are permanently bonded together. According to the different materials sandwiched in the middle, it can be divided into many types: paper sandwiched, cloth sandwiched, plant sandwiched, wire sandwiched, silk sandwiched, metal wire sandwiched, etc.;