Recent automotive glazing requires various functions such as comfort, security & environmental impact in addition to safety. In order to meet customers' demands, PVB for laminated glass plays an important role in high performance automotive glazing. In this article, multi-layer technology of PVB interlayer is presented as a superior solution for high performance glazing. Particularly, sound control interlayer will be discussed to show how multi-lyaer technolgoy contributes to a higher level of performance glazing. Maximum sound attenuation level could never be achieved with singer layer acoustic PVB film because of its low mechanical strength & handling difficulties. Unlike single layer acoustic film, sound attenuation performance in multi-layer PVB construction can be optimised to maximum level by having different functions in the outer and inner layer.
