| abstract |
The present invention relates to a multilayer aligned interlocked polyvinyl butryal composite structure which has good properties as a component in glass laminate structures, especially in those structures needing thick (greater than 0.76 mm) interlayers of PVB. The multilayer structures is produced by a process which uses two or more rollers containing plasticized PVB sheeting which are aligned and interlocked by simultaneous unwinding of the layers at set line speeds, temperatures and unwinding tensions. |