Patent ID: 7547736
Filing Date: 2009-06-16
Classification: B29C,C08F,C08L,Y10S,Y10T

Abstract:
1. An extruded polymeric article having a frosted and textured surface appearance comprised of a polymeric matrix and from greater than 5 percent to 60 weight percent of polymeric particles, wherein said polymeric particles are substantially spherical, highly crosslinked, have a mean particle size of between 35 and 70 micrometers, wherein the article has a Haze number as determined by ASTM D1003 of at least 90%, a Total White Light Transmission of greater than 77.1%, as determinated by a Hunterlab colorimeter_D25 model using ASTM E1331 and ASTM E1164, and a minimum surface roughness of 0.5 micrometers to 30 micrometers as measured using ASME methods B46.1.1, B46.1.2 and Y14.36, wherein said determinations are made using an 0.125 inch thick extruded sheet comprised of the polymeric matrix and polymeric particles and wherein said polymeric matrix and polymer particles have a mismatch of refractive indices in which the difference in refractive index between the polymeric matrix and polymer particles is greater than 0.015 and less than or equal to 0.025.