How to choose suitable PVB thickness for semi-tempered laminated glass and tempered laminated glass?

The flatness for tempered glass and semi-tempered glass is not good as float glass, then the PVB thickness for tempered laminated glass must fill the bumpy space between two tempered glass pieces. If the PVB thickness is severely shortage, then it is hard to produce the quality glass products. If the PVB thickness is a little thinner, though the laminated glass is well without problem when take it out from laminated glass furnance, after installation and using, the possibility of tackless edges and bubbles is very high. Then the reasonable PVB thickness is the key to guarantee the long life-span for tempered and semi-tempered laminated glass.

When to choose the PVB thickness, needn’t consider the glass length, it is only depend on the tempered glass width. According the experience from DuPont PVB and Solutia Inc, and the feedback from the glass projects, to choose PVB thickness for tempered laminated glass and heat-strengthened laminated glass should follow the followed two tables.

PVB-thickness-for-semi-tempered-laminated-glass

PVB-thickness-for-curved-tempered-laminated-glass

In recent years, with the technology upgrading for tempered glass furnance and production technology improvements for toughened glass, the waviness and arch for tempered glass are both lowered by the production from high-end tempered glass production line, the flatness is much better than earlier, but don’t reduce the PVB thickness because of it, especially for the tempered low-e laminated insulated glass. The temperature for low-e laminated glass is ups to 55℃ in summer, the PVB will be softened under such condition. Its anti-tear strength will be lower, and the possibility of tackless edges and bubbles on the tempered laminated glass will be higher. Then to save some cost for the PVB is not worth if the tempered glass have such problems.


Post time: Aug-15-2022