Title:
SOUND ABSORBING MATERIAL PREPARATION METHOD, SOUND ABSORBING MATERIAL, SOUND PRODUCING UNIT, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/135871
Kind Code:
A1
Abstract:
A sound absorbing material preparation method, a sound absorbing material, a sound producing unit, and an electronic device. The sound absorbing material is prepared by mixing an amorphous activated carbon particle containing a hydrophobic layer and a high molecular polymer binder; the amorphous activated carbon particle containing a hydrophobic layer comprises an activated carbon particle core and a hydrophobic layer covering the activated carbon particle core; the hydrophobic layer is made of any one of a zeolite material, an aerogel material, and a porous organic polymer material; the hydrophobic layer has a thickness of 0.1-10 µm; the amorphous activated carbon particle containing a hydrophobic layer has a loose pore structure inside, and the pore structure comprises nano-scale micropores and mesopores; the particle size of the amorphous activated carbon particle containing a hydrophobic layer is 0.1-100 µm, and the particle size of the sound absorbing material is 50-1000 µm. The prepared sound absorbing material can be used for reducing the resonant frequency of a sound producing unit.
Inventors:
PAN QUANQUAN (CN)
YAO YANGYANG (CN)
MOU YAJING (CN)
LI CHUN (CN)
YAO YANGYANG (CN)
MOU YAJING (CN)
LI CHUN (CN)
Application Number:
PCT/CN2020/134834
Publication Date:
July 08, 2021
Filing Date:
December 09, 2020
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
B01J13/02; G10K11/165
Foreign References:
| CN111135772A | 2020-05-12 | |||
| CN109660924A | 2019-04-19 | |||
| CN109448688A | 2019-03-08 | |||
| CN109511056A | 2019-03-22 | |||
| CN109511057A | 2019-03-22 | |||
| CN109511058A | 2019-03-22 | |||
| CN109935224A | 2019-06-25 | |||
| CN107500604A | 2017-12-22 | |||
| JP2018161778A | 2018-10-18 |
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