3m Innovative Properties Company

Zackary J Becker

Michael R Berrigan

John D Stelter

Liming Song

Andrew R Fox

Nathan E Schultz

Daniel C Duan

Zhiqun Zhang

Fuming B Li

Eric M Moore

Seth M Kirk

John M Sebastian

Ignatius A Kadoma

Bryan L Gerhardt

Sachin Talwar

The present disclosure relates to multi-layer composite articles including at least two nonwoven web layers. Each or the layers may be a spunbonded web, and each may include biodegradable materials. The multi-layered composites of the present disclosure are particularly well suited for air filtration, as they can combine a high dust holding capacity with sufficient strength, dimensional stability, and a relatively low pressure drop.

Multi-layer, biodegradable composites for air filtration

Spunbonded electret webs comprising polylactic acid fibers, in which at least some of the polylactic acid fibers are meltspun, drawn, charged fibers that include charging additive; and, methods of making such fibers and webs.

Spunbonded web comprising polylactic acid fibers

Growing community of inventors

Minneapolis, MN, United States of America

Zackary J Becker