US 12,467,511 B2
Damping material
Kazuki Fukui, Saitama (JP)
Assigned to KOTOBUKIYA FRONTE CO., LTD., (JP)
Filed by KOTOBUKIYA FRONTE CO., LTD., Tokyo (JP)
Filed on Mar. 12, 2024, as Appl. No. 18/602,473.
Application 18/602,473 is a continuation of application No. 17/271,654, granted, now 11,959,525, previously published as PCT/JP2019/002329, filed on Jan. 24, 2019.
Claims priority of application No. 2018-241305 (JP), filed on Dec. 25, 2018.
Prior Publication US 2024/0209911 A1, Jun. 27, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F16F 1/36 (2006.01); B32B 3/26 (2006.01); B32B 5/02 (2006.01); B32B 15/08 (2006.01); B32B 15/085 (2006.01); B32B 15/18 (2006.01); B32B 15/20 (2006.01); B32B 27/12 (2006.01)
CPC F16F 1/36 (2013.01) [B32B 3/266 (2013.01); B32B 5/02 (2013.01); B32B 15/085 (2013.01); B32B 15/18 (2013.01); B32B 15/20 (2013.01); B32B 27/12 (2013.01); B32B 2262/106 (2013.01); B32B 2307/56 (2013.01); B32B 2605/00 (2013.01); F16F 2224/02 (2013.01); F16F 2224/0208 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A vibration damping material comprising:
a viscoelastic layer; and
a constraining layer provided on one surface of the viscoelastic layer,
wherein the constraining layer has a multilayer structure including a core layer in which tubular cells are arranged in a plurality of rows, and film layers provided on both sides of the core layer, and
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.