3m Innovative Properties Company

Liyun Ren

Sachin Talwar

Daniel J Zillig

Pingfan Peter Wu

Eumi Pyun

Jeffrey A Chambers

Catherine A Leatherdale

Michael R Berrigan

Thomas P Hanschen

Akira Ito

Ronald W Gerdes

Tien T Wu

Thomas Herdtle

Jonathan H Alexander

Timothy J Rowell

Paul A Nielsen

Nurkan Turkdogru Gurun

Jinzhang You

Xiaojun Su

Qinrong Wu

Xiao Jun Su

Provided are non-woven fibrous webs, methods and assemblies thereof. The non-woven fibrous web comprises a plurality of melt-blown fibers. The plurality of melt-blown fibers include a thermoplastic polymer blended with a phosphinate and/or polymeric phosphonate. The provided non-woven articles can afford a fine fiber diameter for enhanced acoustic insulation properties, dimensional stability, and superior flame-retardant properties when compared with conventional non-woven articles having similar fiber diameters.

Flame-retardant non-woven fibrous webs

An assembly includes an enclosure including first and second regions spaced apart along a first direction, and a plurality of spaced apart acoustic baffles arranged along a second direction different from the first direction and disposed in the enclosure between the first and second regions. The plurality of spaced apart acoustic baffles includes adjacent first and second acoustic baffles. Each of the first and second acoustic baffles include an acoustically absorptive layer disposed on a sheet having a specific airflow resistance greater than 200 MKS Rayl. The first and second acoustic baffles define a channel therebetween. At least a portion of the channel extends along a longitudinal direction making an oblique angle with the first direction.

Assembly including acoustic baffles

The provided articles, assemblies, and methods use a non-woven fibrous web () having one or more layers () that are densified in situ to provide a layer that is densified relative to one or more adjacent layers, collectively within a unitary non-woven construction. The non-woven web () can be made from fibers having a composition and/or structure that resist shrinkage induced by polymer crystallization when subjected to high temperatures. Advantageously, the provided non-woven webs () can be molded to form a three-dimensional shaped article that displays dimensional stability.

Non-woven fibrous web and methods thereof

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Woodbury, MN, United States of America

Liyun Ren