Systems, Methods and Apparatuses for Direct Embossment of a Polymer Melt Sheet
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United States of America Patent
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Issued Date -
May 31, 2012
app pub date -
Mar 22, 2011
filing date -
Nov 30, 2010
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Abstract
A continuous single-stage embossing station comprised of two (2) temperature controlled engraved rollers which is located immediately after the extrusion die in the manufacturing process for multi-layer laminated glass panels and allows for dual simultaneous embossment of both sides of a polymer melt sheet and produces a polymer interlayer sheet with increased permanence, embossed retention values and decreased incidence of mottle and stack sticking peel force values. Also disclosed herein is an embossed polymer interlayer sheet with a first side, a second side and an embossed surface on at least one of the sides, with a surface roughness Rz of 10 to 90 microns on the embossed surface, a permanence of greater than 95% when tested at 100° C. for five (5) minutes and an embossed surface retention of greater than 70% when tested at 140 ° C. for five (5) minutes.
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