Patent ID: 11959525
Assignee: KOTOBUKIYA FRONTE CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC F  B | IPC B  F

Claim 0:
1. A vibration damping material comprising:
a viscoelastic layer; and
a constraining layer provided on one surface of the viscoelastic layer,
wherein a relationship between a strain εa and a strain εb is 0<εa/εb<1, the strain εa being a strain on a surface of the constraining layer on the opposite side to the viscoelastic layer, and the strain εb being a strain on a surface of the constraining layer on a side in contact with the viscoelastic layer,
wherein the constraining layer has a multilayer structure including at least a core layer in which tubular cells are arranged in a plurality of rows,
wherein each of the cells in the core layer has a closed surface at one end and an open end at another end,
the open ends of the cells each allow an internal space of the cell to be in communication with an outside, and
the open ends of the cells are arranged on both sides of the core layer such that rows of the open ends of the cells are in every other row.