Incombustible sound absorption panel

Abstract

[Problem to be Solved ] To attain an incombustible sound absorption panel by providing incombustibility to a sound absorption/insulation sandwich panel containing a combustible material as a constituting material. [Solution to Problem] Fine powder of chips generated during cutting of a foam material to fill in a honeycomb material is located in a gap between the foam material and a sound absorption surface material. A gap between fibers of the sound absorption surface material is blocked by the chips having been moved by a flow such as a water vapor flow generated from hydrate of the honeycomb material heated on the occurrence of a fire. As a result, an air flow path is limited. Further, carbon dioxide gas generated from the foam material is trapped to reduce an oxygen amount, thereby inhibiting combustion. Usage of an adhesive as a combustible material is reduced.

Dependencies are inferred from the claim text.