POLYMERIC INTERLAYERS HAVING ENHANCED SURFACE ROUGHNESS

摘要

Embossed polymer sheets and interlayers having at least one tapered zone are provided. The roughness of the embossed portion of the sheets and interlayers may be substantially uniform. Methods and systems for producing such interlayers are also described herein and may utilize at least one pair of rollers oriented substantially parallel to one another. When used in multiple layer panels, such as safety glass laminates, the embossed tapered interlayers described herein exhibit excellent optical performance, as indicated by the low haze and high clarity of the resulting panels.

主权项

1. A polymeric sheet suitable for producing an interlayer, said sheet comprising:
at least one polymeric resin, wherein said sheet comprises at least one tapered zone and at least one substantially flat zone, wherein said tapered zone has a wedge angle of at least 0.10 mrad, wherein said substantially flat zone has a wedge angle of less than 0.05 mrad, wherein said sheet comprises at least one embossed surface, wherein at least 75 percent of said embossed surface has an Rz value within 25 percent of the average Rz value for the entire embossed surface.