Patent ID: 11866931
Assignee: SHIZUKA CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E  B | IPC B  E

Claim 0:
1. An incombustible sound absorption panel wherein
a honeycomb material is filled with a foam material to form a core,
a sound absorption surface material as an air-permeable fiber material is arranged on one surface of the honeycomb material and a sound insulation material without air permeability is arranged on an opposite surface of the honeycomb material, and the honeycomb material filled with the foam material, the sound absorption surface material and the sound insulation material adhesively bonded with an adhesive,
a layer of chips of the foam material is arranged between the foam material filling the honeycomb material and the sound absorption surface material, and
when the chips are heated, the chips act as a blocking material filling a gap between fibers of the sound absorption surface material to generate a state of oxygen deficiency.