Invented more than 80 years ago, PVB has been the dominant laminated safety glass interlayer material since the late 1930s. PVB is a resin normally used for applications that require binding, optical clarity, adhesion to glass surfaces, toughness and flexibility. The major application of PVB is as the interlayer in laminated safety glass for architectural purposes and automotive windscreens.
PVB interlayers are tough and ductile, so brittle cracks will not pass from one side of the laminate to the other. PVB interlayers were developed specifically for automotive applications in order to reduce head-impact injuries in car accidents. More than 90% of laminated safety glass interlayers are made from PVB.
In architectural applications, PVB is mostly used in fully-framed windows, insulated glazing units and glass applications, where the edges of the glass are protected. Other types of PVB interlayer include acoustic PVB, which offers improvements in acoustic comfort.
Stiff PVB is used mainly in structural glazing for architectural applications and for aircraft windscreens and offers additional stiffness in fully framed glass applications.
Extensive and detailed information on the production of laminated safety glass can be found in the new, 2012 edition of our Trosifol™ Manual. We regret that this manual has been compiled exclusively for our customers. We have made two brief extracts available to you here: