Polymeric articles having a textured surface and frosted appearance
AssigneeArkema France
InventorsSh-Jun Yang, Fabio Giberti, Ralph Clark, Leslie Cohen
Life of this patent
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Abstract
Disclosed is a polymeric article having a frosted and/or surface textured finish made from a polymeric resin comprised of a polymeric matrix and polymeric particles which are substantially spherical, highly crosslinked, have a mean particle size of between 15 and 70 micrometers and have a particle size distribution between 10-110 micrometers.
Claims16
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.
A resin comprised of a polymeric matrix and polymeric particles wherein said from greater than 5 percent to 60 weight percent of polymeric particles are substantially spherical, highly crosslinked, have a mean particle size of between 35 and 70 micrometers, wherein a 0.125 inch thick sheet extruded from said resin has a Haze number as determined by ASTM D1003 of at least 90% 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, 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 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 or equal to than 0.025.
Dependencies are inferred from the claim text.