Laminated glass, laminated glass laminated glass is made up of two or more pieces of glass, sandwiched between a layer or multilayer organic polymer membrane, specially in the high temperature pressure (or vacuum) and after high temperature and high pressure, made of glass and middle membrane permanent adhesive for the integration of composite glass products. Commonly used middle laminated glass membrane are: PVB, the SGP, EVA, PU, etc. Main types according to the melting point of middle membrane, can be divided into: cold sandwich glass, sandwich glass, hollow glass in high temperature; According to the intermediate between different materials, can be divided into: paper, fabric, clip to plants, silk, silk, clip to wire and so on many kinds; Between layers according to the different bonding method, can be divided into: mixing method of laminated glass, laminated glass for dry sandwich glass, hollow; According to the sandwich layer of different types, can be divided into: general laminated glass and bulletproof glass. Material properties of glass, even rupture fragments will be stick on the film, broken glass still maintain clean and smooth surface. It is effective to prevent the fragments scratches and penetrate the crash happened, ensure the personal safety. In Europe and the United States, most of the architectural glass using laminated glass, not only in order to avoid accidents, but also because of sandwich glass has excellent aseismic invasion ability. Middle membrane can resist the hammer, chopping wood knife, continuous attack weapon, but also for quite a long time against bullet, its security level is very high. Safety glass is broken, and under the heavy ball impact may be broken, but the whole piece of glass still keep one sandwich, debris and sharp bits and middle membrane together. This glass is broken, the fragments will not disperse, multi-purpose in car transport, etc. Toughened glass need larger impact force to be broken, once broken, the whole piece of glass burst into millions of tiny particles, the framework of only a few broken glass. Common glass bump is broken, the typical broken condition, produce many elongated sharp mouth pieces. Wire broken glass, mirror tooth fragments surrounded by the mouth of the cave, and around the penetration points have more shards of glass, metal wire fracture length.
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