| abstract |
Article comprises a polymer foam having a surface roughness 75 Microm (measured by laser triangulation profilometry). The foam comprises microspheres, at least one of which is an expandable polymeric microsphere. Independent claims are also included for the following: (A) preparing the article, comprising: (a) melt mixing a polymer composition and several microspheres to form an expandable extrudable composition, (b) extruding the composition through a die to form a foam, and (c) at least partially expanding the microsphere(s) before the composition exits the die; and (B) a multi-layer article comprising: (a) a substrate having a pair of major surfaces, and (b) a foam article on a major surface of the substrate. |