Patent ID: 11929054
Assignee: MAXELL, LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  G | IPC B  G

Claim 0:
1. A soundproof material comprising:
a surface cover layer composed of a fiber material;
a back-surface layer laminated onto the surface cover layer, and composed of a porous material with voids interconnected with each other; and
a joining layer laminated between the surface cover layer and the back-surface layer, and composed of a joining material,
wherein:
the fiber material has an average fiber diameter of 1 to 10 μm and an air-permeation volume of 5 to 200 cm3/cm2·sec,
the joining layer has a joint area percentage of 50 to 95% with respect to an entire surface where the surface cover layer and the back-surface layer face each other, and
the surface cover layer has a basis weight from 5 to 300 g/m2.