Life span of laminated building glass

Laminated glass is a composite glass product in which one or more layers of organic polymer interlayer films are sandwiched between two pieces of glass. After processing, the glass and the interlayer film are permanently bonded together. Even if the laminated glass is broken, the shards will be stuck to the film, which effectively prevents the shards from piercing and falling, and ensures personal safety.

The life span of laminated glass depends mainly on the material of the laminated interlayer. Normally, wet laminated glass and EVA laminated glass are mainly used for interior partitions, not for architectural doors, windows or curtain walls. Wet laminated glass will accelerate aging under sunlight, yellowing phenomenon will appear after 1-2 years, and debonding bubbles, ice flowers and fogging will start to appear one after another in 2-3 years.

Generally speaking, the aging rate of wet laminated glass is much faster than that of EVA laminated glass, which can have a life span of more than 10 years when used indoors to avoid direct sunlight. Dry laminated glass is suitable for industrial production and its service life will be much longer than wet laminated glass.

 

PVB and SGP laminated glass, which are usually used as doors, windows or curtain walls, have much better aging resistance. The most typical failure of laminated glass PVB and SGP is glue opening, which means that the glass and the spacer are separated, and the safety characteristics of laminated glass are lost. Regarding the service life of PVB and SGP laminated glass, there are currently no relevant standards and norms in China.

At present, domestic glass processing enterprises generally refer to the relevant materials of foreign PVB and SGP suppliers to give a product warranty period of 5-7 years.

In fact, the life of PVB and SGP laminated glass is not only affected by the material of the intermediate layer, but also greatly affected by the thickness of the intermediate layer, the quality of the laminated glass substrate, and the control of the laminated glass process.