SOUNDPROOFING AND THERMALLY INSULATING STRUCTURAL ELEMENT OF CLOSED-CELL POLYURETHANE RIGID FOAM

摘要

PURPOSE: Provided is a structural element of closed-cell polyurethane rigid foam having good thermal insulation and improved sound absorption properties. CONSTITUTION: The element comprises a panel of polyurethane rigid foam with a proportion of closed cells of more than 90%, with a surface having 1 to 18 depressions per square centimeter, the depressions having a diameter of from 0.1 to 10 mm and a depth of from 10 to 70 mm, wherein at least two types of depressions that differ in at least one dimension are present.