3M Innovative Properties Company

Nicole D Petkovich

Matthew H Frey

Michael S Wendland

Gary Timothy Boyd

Craig R Schardt

Michael R Berrigan

Hassan Sahouani

Jonathan H Alexander

Michelle M Mok

Eric J Borchers

Seungkyu Lee

Provided are acoustic articles, and related methods, that include a porous layer and heterogeneous filler received in the porous layer. The heterogeneous filler can include clay, diatomaceous earth, graphite, glass bubbles, polymeric filler, non-layered silicate, plant-based filler, or a combination thereof, and can have a median particle size of from 1 micrometer to 1000 micrometers and a specific surface area of from 0.1 m/g to 800 m/g. The acoustic article can have an overall flow resistance of from 100 MKS Rayls to 8000 MKS Rayls. The acoustic articles can serve as acoustic absorbers, vibration dampers, and/or acoustic and thermal insulators.

Acoustic articles and methods thereof

An optical construction includes a reflective polarizer layer having a first pass axis and an absorptive polarizer layer having a second pass axis that is substantially aligned with the first pass axis. At least one electrically conductive light scattering layer is arranged between the reflective polarizer layer and the absorptive polarizer layer.

Optical constructions

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Roseville, MN, United States of America

Nicole D Petkovich