초록 ▼

A sandwich panel made of a composite material with acoustical attenuation for a wall and/or self-supporting covering, more particularly for doubling the bulkheads or cabin walls of aircraft, and including an alveolar structural core (14) especially a honeycomb core, and two skins (12, 16) disposed a

A sandwich panel made of a composite material with acoustical attenuation for a wall and/or self-supporting covering, more particularly for doubling the bulkheads or cabin walls of aircraft, and including an alveolar structural core (14) especially a honeycomb core, and two skins (12, 16) disposed and rendered integral on both sides of the core, wherein the two skins (12, 16) include holes and wherein the holes of at least one of the two skins are micropores. A method for producing this panel is also disclosed.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method making an acoustic insulation panel comprising the steps of:providing a form having a shape of a desired said panel;placing a first skin comprising resin on ther form;placing a honeycomb core in direct contact with the first skin;placing a second skin comprisin

[ What is claimed is:] [1.]1. A method making an acoustic insulation panel comprising the steps of:providing a form having a shape of a desired said panel;placing a first skin comprising resin on ther form;placing a honeycomb core in direct contact with the first skin;placing a second skin comprising resin in direct contact with the honeycomb core; andheating the first skin, second skin, and honeycomb core;wherein the heating step produces perforations in the first and second skins and wherein the perforations of at least one of the first and second skins are micropores.