Difference between SGP laminated glass and PVB laminated glass?
1. Same feature
PVB laminated glass and SGP laminated glass are different kinds of laminated glass, have laminated glass features, that is, the breakage will bond on film and will not fall down. This feature make the laminated glass the most safety glass currently, compared to tempered glass. Even tempered glass also called safety glass, the breakage will become small cubic fragments, but will fall down. Kindly check below links of difference of pvb laminated glass, sgp laminated glass and tempered glass after broken.
①high strength and shear modulus, excellent mechanical properties
The cutting modulus of SGP film is 50 times more than PVB film, and the tear strength is 5 times higher than PVB film. After the SGP is laminated, when the SGP laminated glass is stressed, the SGP layer between the two pieces of glass will not slide, and the two pieces of laminated glass work as the same thickness single glass. In this way, the bearing capacity is twice than PVB laminated glass of equal thickness; At the same time, under the same load and equal thickness, the bending deflection of SGP laminated glass is only 1/4 of PVB laminated glass.
As the bearing capacity is increased and the deflection is reduced, the thickness of the glass will be reduced accordingly. It is possible to reduce the amount of glass by about 40%, which will reduce the weight of the glass curtain wall.
②Good edge stability, can be exposed for exterior use without edge banding
Edge stability refers to the durability of the sandwich edge exposed to atmospheric conditions. The PVB interlayer can not resistant to moisture, and it is easy to delamination and separate under the action of water vapor, It need exposed edges to be edge-sealed in usage. The SGP film has good edge stability, is not sensitive to moisture, and will not delamination the glue under the exposed conditions. It can be used for the structure of exposed edges such as railings, rain sheds, glass visors, etc. without the need for special edge sealing measures.
③After the SGP laminated glass is broken, there is sufficient residual bearing capacity, and the whole piece will not fall down.
PVB laminated glass, once the glass is broken, it will have a large bending deformation, there is a risk of the whole piece falling off. When the glass is installed horizontally on the lighting roof, the risk is higher.
SGP laminated glass has good integrity, and the tear strength is 5 times that of PVB laminated. Even if the glass breaks, SGP film can bond the broken glass to form a temporary structure after destruction, the bending deformation is small, and it can withstand a certain amount of The load does not fall from the film, which greatly improves the safety of the glass.
④Colorless and transparent, not easy to deform, excellent permeability
SGP film is colorless and transparent, has good weather resistance and is not easy to turn yellow. The yellowing coefficient of SGP film is less than 1.5, while the yellowing coefficient of PVB film is 6-12. Therefore, SGP laminated glass can better meet the architect's architectural art requires. If use ultra-clear glass and SGP film, the crystal clear optical effect of ultra-clear SGP laminated glass will be excellent.
3. How to distinguish PVB laminated glass and SGP laminated glass?
For finished pvb and sgp laminated glass, the appearance looks same. You can press the film of those two kinds of glass edge, the sgp laminated glass film feels very hard and pvb laminated glass film feels a little soft.
Following video is a brief introduction of those two glass difference. https://youtu.be/ipwsxp6-ZqU