The difference between PVB film and SGP film
PVB film has been used in the construction industry for many years, has a wide range of uses achieved and good safety effects. However, due to the elasticity, softness and small shear modulus of the PVB film, the two glass in the PVB laminated glass will have relative slippage after the force is applied, the bearing capacity will be reduced, and the bending deformation will be large. At the same time, the exposed edge of PVB film laminated glass is easy to be wetted and tackles. Long-term use is prone to yellowing, so PVB film laminated glass can be used for general glass curtain walls, not suitable for high-performance glass curtain walls.
The shear modulus of SGP film is more than 50 times that of PVB, and the tear strength is 5 times that of PVB. When the SGP laminated glass is stressed, there is almost no slip between the two sheets of glass, and the bearing capacity is twice that of the PVB laminated glass. SGP laminated glass degree of curvature is only 1/4 of PVB laminated glass under the same load and the same thickness.
Compared with PVB laminated glass, SGP laminated glass has superior performance, and SGP film has the following properties:
1. It has high bonding ability to glass and strong tear strength, which can prevent the glass from breaking and scattering.
2. It has strong protective ability, can prevent natural disasters and human damage, and has sufficient resistance to strong winds, earthquakes, violence, theft, etc.
3. It can withstand the sudden impact of indoor personnel, prevent the glass from scattering or the whole out, and avoid indoor people and articles flying out and falling.
4. After the glass is broken, there is enough residual bearing capacity, and the glass will not fall off after being broken.
5. SGP film has sufficient bearing capacity and bending rigidity to reduce the thickness of glass and the weight of glass.
6. Can withstand the effects of ultraviolet light, water vapor and external climate change, long-term use will not appear yellowing discoloration.