Laminated glass is a type of safety glass that is made of two or more panes of annealed glass or tempered glass joined together by PVB (polyvinyl butyl) interlayer.
For PVB film, it has high weather resistance and strong potential performance, and can be fully bonded to its glass during the production process. After the laminated glass is formed, the glass can have strong impact resistance and strong penetration resistance. Therefore, after the glass is damaged, its fragments can still adhere to the film in it, so as to avoid the problem of glass scattering. During the setting of the intermediate layer, its thickness can directly affect the impact force, which has a strong The buffering effect.
The higher the thickness, the higher the impact force it can withstand, and the thickness of the intermediate layer is often doubled, which can effectively increase the impact resistance by 2 to 3 times. In the process of selecting laminated PVB film, it needs to operate strictly in accordance with the "Technical Specification for Application of Architectural Glass". For some special parts of the laminated glass in the use process, strictly according to the corresponding film thickness requirements, use. In the regulations, for some roof glass or for the use of some canopy glass, it is necessary to use laminated glass. At the same time, when using laminated glass, the thickness of the film needs to be ≥0.38mm, which can be increased by multiples. The larger the area, The thickness is appropriately increased. For the use of floor glass, it is also necessary to use laminated glass, and for the use of point-supported floor glass, it is necessary to use tempered laminated glass. During the use of floor laminated glass, the thickness of its single sheet needs to be between 3mm, and the thickness of the internal laminated film needs to be above 0.76mm.
In the specific selection process, in order to maximize the adhesion between the glass and the film, in general, the actual thickness of the PVB film needs to be 0.38 in the ordinary laminated glass production process. When the original glass is above 8mm, the thickness of the PVB film needs to be above 0.76mm. For tempered glass, when the thickness is more than 8mm, the actual thickness of PVB needs to be more than 1.14mm. For some panels with relatively large actual capabilities and safety considerations during use, the thickness of the film should be increased as much as possible.
