Acoustic absorbing filler and related acoustic article
Assignee3M Innovative Properties Company
InventorsMichelle M. Mok, Nicole D. Petkovich, Michael R. Berrigan, Yongbeom Seo, Andrew J. Hatch, Kevin A. Frankel, Seungkyu Lee
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Abstract
An acoustic absorbing filler, the acoustic absorbing filler comprising agglomerates comprising a first phase comprising a plurality of porous particulates and a second phase comprising a binder; wherein the acoustic absorbing filler has a median sieved particle size of from 100 micrometer to 700 micrometers and a specific surface area of from 50 m2/g to 900 m2/g; wherein the acoustic absorbing filler has a normal incidence acoustic absorption of no less than 0.20 alpha at 400 Hz.
Claims16
An acoustic absorbing filler, the acoustic absorbing filler being a plurality of particle agglomerates,
- wherein each of the particle agglomerates comprises a first phase comprising a plurality of porous particulates and a second phase comprising a binder;
- wherein the acoustic absorbing filler has a median sieved particle size of from 100 micrometer to 700 micrometers and a specific surface area of from 50 m2/g to 900 m2/g;
- wherein the acoustic absorbing filler has a normal incidence acoustic absorption of no less than 0.20 alpha at 400 Hz.
Dependencies are inferred from the claim text.