3m Innovative Properties Company

Sachin Talwar

Daniel J Zillig

Eric M Moore

Pamela A Percha

Liming Song

Liyun Ren

Michael R Berrigan

Pingfan Peter Wu

Michael D Swan

Eumi Pyun

Myles Lee Brostrom

Michael D Romano

Jeffrey A Chambers

Randy L Christiansen

Catherine A Leatherdale

Andrew R Fox

Thomas P Hanschen

Akira Ito

Rui Chen

John D Stelter

Nathan E Schultz

Fuming B Li

Ronald W Gerdes

John M Sebastian

Thomas Herdtle

Tien T Wu

Nataliya V Fedorova

Jonathan H Alexander

Sehyun Nam

Timothy J Rowell

Xiaoshuan Fu

Paul A Nielsen

Chiaki Hanamaki

Zackary J Becker

Jin Zhang You

Nurkan Turkdogru Gurun

Jinzhang You

Xiaojun Su

Qinrong Wu

Xiao Jun Su

Myles L Brostrom

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

A process and apparatus for producing a dimensionally stable melt blown nonwoven fibrous web. The process includes forming a multiplicity of melt blown fibers by passing a molten stream including molecules of at least one thermoplastic semi-crystalline (co)polymer through at least one orifice of a melt-blowing die, subjecting at least a portion of the melt blown fibers to a controlled in-flight heat treatment operation at a temperature below a melting temperature of the at least one thermoplastic semi-crystalline (co)polymer immediately upon exiting from the at least one orifice, and collecting at least some of the melt blown fibers subjected to the controlled in-flight heat treatment operation on a collector to form a non-woven fibrous structure. The nonwoven fibrous structure exhibits a Shrinkage less than a Shrinkage measured on an identically-prepared structure including only fibers not subjected to the controlled in-flight heat treatment operation, and generally less than 15%.

Dimensionally-stable melt blown nonwoven fibrous structures, and methods and apparatus for making same

A thermally stable nonwoven web including blended-polymer meltblown fibers containing a blend of poly (butylene terephthalate) and poly (ethylene terephthalate).

Thermally stable nonwoven web comprising meltblown blended-polymer fibers

Process of making dimensionally-stable melt blown nonwoven fibrous structures

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

A melt blowing process comprising: (a) providing a thermoplastic polymer material that includes at least one or a plurality of polyester polymers and at least one or a combination of different meltable metal phosphinates; and (b) melt blowing the thermoplastic polymer material into at least one fiber or a plurality of fibers, with each fiber having a diameter or thickness that is less than about 10 microns. The metal phosphinate is in an amount that (a) reduces the viscosity of the polyester polymer and (b) functions as a crystallizing agent, which at least promotes crystallization of the polyester polymer, when the thermoplastic polymer material is melt blown into the at least one fiber. Non-woven and woven fibrous structures can be made using fibers made from this process.

Melt blown fiber forming process and method of making fibrous structures

Growing community of inventors

Woodbury, MN, United States of America

Sachin Talwar