| abstract |
A method for producing a foam sheet comprises: forming a foamed material, casting the foamed material, impinging the cast material with a fluid at a sufficient pressure to form a hole, and curing the impinged material. If the foamed material comprises a thermoset, the foamed material is uncured or partially cured. If the foamed material comprises a thermoplastic, the foamed material is unset or partially set. A foam sheet comprises: a first surface and an opposite second surface, and a plurality of holes extending through the first surface toward the second surface. The holes comprise a skin cover, the holes having a conical geometry, and/or each of the holes has a diameter larger than the largest pore diameter of the foam, as well as combinations comprising at least one of the foregoing characteristics. |