ZWISCHENSCHICHTSTRUKTUR FÜR VERBUNDGLAS

摘要

The present invention relates to an interlayer product for laminated safety glass whereby multiple layers of interlocking interlayer film having the desired properties of thickness and melt fracture surface pattern are combined to meet a specific functional need. In the present invention, two or more rolls of sheeting comprising polyvinyl butyral as the primary component are simultaneously unwound and rewound together under controlled tension, line speed and temperature so that the edges of the respective layers are aligned and roll formation is normal, the tension on the respective sheets is equal, thickness is maintained and entrapped air is minimized. The resulting product is used to produce laminated safety glass with thick interlayer construction.