GLASS/POLYVINYLBUTYRAL LAMINATES HAVING DIRECTIONAL SURFACE PATTERNS AND A PROCESS FOR PREPARING SAME

摘要

De-airing of PVB/glass laminates can be improved, while haze in the pre-press is minimized and sleep time reduced as a result using a PVB sheet having a roughened surface with directionality. A roughened surface with a washboard pattern that is useful in this regard can be obtained by varying certain conditions of a melt-fracture extrusion process.