US 12,227,938 B2
Molded body, sound absorbing material, vibration absorbing material
Satoru Nakajima, Ayase (JP)
Assigned to TOSOH CORPORATION, Shunan (JP)
Appl. No. 17/915,445
Filed by TOSOH CORPORATION, Shunan (JP)
PCT Filed Mar. 29, 2021, PCT No. PCT/JP2021/013396
§ 371(c)(1), (2) Date Sep. 28, 2022,
PCT Pub. No. WO2021/200870, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 2020-061081 (JP), filed on Mar. 30, 2020.
Prior Publication US 2023/0040730 A1, Feb. 9, 2023
Int. Cl. E04B 1/84 (2006.01); G10K 11/162 (2006.01); B60R 13/08 (2006.01)
CPC E04B 1/84 (2013.01) [G10K 11/162 (2013.01); B60R 13/08 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A molded body comprising:
a plurality of cavity portions formed inside a molding material; and
a plurality of neck portions provided in each of the plurality of cavity portions and configured to communicate with the cavity portions,
wherein some of the plurality of neck portions communicate with a surface and/or the cavity portion exposed on the surface,
wherein at least some of the plurality of neck portions cause the plurality of cavity portions to communicate with each other,
wherein an inner surface of the neck portion is formed by the molding material itself, and
wherein a protruding portion is formed by the neck portion, the protruding portion protruding from an inner surface of the cavity portion into the cavity portion, and a protruding height of the protruding portion with respect to the inner surface of the cavity portion is 100 μm or less.