Abstract: A sample collection device includes a housing extending from a mouthpiece end to an air outlet end, the housing defining an airflow channel from the mouthpiece end to the air outlet end, the mouthpiece end configured to receive an exhalation airflow. A porous sample collection media is fixed within the housing and along the airflow channel. A mouthpiece end cap is replaceably coupled to the mouthpiece end and an air outlet end cap is replaceably coupled to the air outlet end.

Abstract: Provided are acoustic articles having a porous layer (102,104,106) placed in contact with a heterogeneous filler comprising porous carbon and having an average surface area of from 0.1 m2/g to 10,000 m2/g. The acoustic articles can have a flow resistance of from 10 MKS Rayls to 5000 MKS Rayls. Optionally, the porous layer includes a non-woven fibrous layer or a perforated film having a plurality of apertures with an average narrowest diameter of from 30 micrometers to 5000 micrometers. The heterogeneous filler can enhance low frequency performance without significantly compromising high frequency performance, thickness or weight.

Abstract: The provided articles, assemblies, and methods use a non-woven fibrous web (50) having one or more layers (60) 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 (50) 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 (50) can be molded to form a three-dimensional shaped article that displays dimensional stability.

Abstract: The present disclosure relates to sample collection devices and sample collection and testing devices. The devices described herein includes a housing defining a fluid channel from a first portion to a second portion. The devices further include a porous sample collection media disposed within the housing and in fluid communication with the fluid channel. The devices further include a fluid inlet port disposed in fluid communication with the porous sample collection media. The fluid inlet port is configured to direct a test fluid onto the porous sample collection media. The sample collection device further includes an assay configured to receive a fluid that was incident on the porous sample collection media (and eluent) and test that eluent for the presence (or absence) of a pathogen or virus.

Abstract: The present disclosure provides a sample collection device. The sample collection device includes a housing defining a fluid channel from a first portion to a second portion. The sample collection device further includes a porous sample collection media disposed within the housing and in fluid communication with the fluid channel. The sample collection device further includes a fluid inlet port disposed in fluid communication with the porous sample collection media. The fluid inlet port is configured to direct a test fluid onto the porous sample collection media. The sample collection device further includes an assay configured to receive a fluid that was incident on the porous sample collection media.

Abstract: A sample collection device including a housing extending from a mouthpiece portion to an air outlet portion. The housing defines an airflow channel from the mouthpiece portion to the air outlet portion. The mouthpiece portion is configured to receive an h exhalation airflow. A porous sample collection media is disposed within the housing and along the airflow channel. A fluid inlet port defines an aperture through the housing and is adjacent to the porous sample collection media. The fluid inlet port is configured to direct id onto the porous sample collection media. A metered fluid dose element is attached to the fluid inlet port. The metered fluid dose element is configured to dispense a metered volume of fluid into the fluid inlet port.

Abstract: A fibrous web comprising multiple fibers, wherein the fibrous web has a major web surface; wherein the fibers near the major web surface comprise an outer surface; wherein the outer surface of the fibers compromises a recrystallized skin layer; wherein the recrystallized skin layer has a plurality of textures; and wherein at least another part of the outer surface is smooth.

Abstract: A relofted, spunbonded nonwoven web exhibiting a solidity of from less than 8.0%, to at least 3.0%, and exhibiting a Quality Factor of at least 0.30. Methods of making a relofted web; and, methods of using a relofted web as an air-filtration web, e.g. as a filter media or a layer thereof.

Abstract: Provided herein are acoustic articles (100) that include a porous layer (102) and heterogeneous filler (104) received in the porous layer. The heterogeneous filler is substantially non-porous and present in an amount of from 0.25% to 7% by volume relative to the total volume of the porous layer and has a specific surface area of from 0.01 m2/g to 1 m2/g. The acoustic article has a flow resistance of from 500 MKS Rayls to 12,000 MKS Rayls.

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.

Abstract: An acoustic absorbing filler, the acoustic absorbing filler comprising a core particle comprising a polymer; an outer layer coated on the core particle, wherein the outer layer comprise microporous particulates; and wherein the acoustic absorbing filler has a median particle size of from 100 micrometer to 700 micrometers and a specific surface area of from 10 m2/g to 400 m2/g; wherein the acoustic absorbing filler has a normal incidence acoustic absorption of no less than 0.15 at 300 Hz when measured in a 20 mm packed bed.

Abstract: A clinical garment for patient warming including a front body panel having a first edge, an opposite second edge, an insulated sheet comprising an insulated layer positioned between an outer layer a film layer, a permeable layer adjacent to the film layer of the insulated sheet, a blanket section defined by a lower portion of the insulated sheet sealed to a lower portion of the permeable along a top edge, a bottom edge, and opposite first and second side edges of the blanket section, and at least one inlet port extending into the blanket section. The garment further includes a first back panel secured to at least a portion of the first edge of the front body panel and a second back panel secured to at least a portion of the second edge of the front body panel.

Abstract: A pleated multilayer air filter assembly including a primary filtration layer and a prefilter layer that are bonded to each other and are co-pleated with each other. The primary filtration layer includes meltblown electret fibers. The prefilter layer includes meltspun, spunbonded electret fibers that comprise a radially outer surface comprising polymethylpentene. The ratio of Effective Fiber Diameter of the fibers of the primary filtration layer to Effective Fiber Diameter of the fibers of the primary filtration layer is at least 1.5.

Abstract: A thermoplastic core-sheath fiber comprises: a polymer fiber core having a coextensive sheath layer disposed thereon, and an electrostatic charge enhancing additive. The sheath layer may comprise poly(4-methyl-1-pentene) and the fiber core and the sheath layer have different compositions. At least one of the fiber core or the sheath layer comprises an electret charge. A nonwoven fibrous web comprising the core-sheath fibers and a respirator including the nonwoven fibrous web are also disclosed.

Abstract: A filter assembly comprises an air filter medium and a prefilter medium. The prefilter medium comprises a second nonwoven fibrous web comprising poly(4-methylpentene) and an electrostatic charging additive and has a second electret charge. The filter assembly is configured such that air passing through the prefilter is directed through the air filter medium. A respirator includes the filter assembly. A prefilter assembly comprises a third nonwoven fibrous web retained by a prefilter frame. The third nonwoven fibrous web comprises: core-sheath fiber comprising a fiber core having a poly(4-methylpentene) sheath layer disposed thereon; and an electrostatic charging additive, wherein the electrostatic charging additive is contained in at least one of the fiber core or the sheath layer. The third nonwoven fibrous web has a third electret charge.

Abstract: A composite fabric includes a nonwoven fabric layer having non-bonded areas and a structured film layer discontinuously bonded to the nonwoven fabric layer. The discontinuously bonded nonwoven fabric layer and the structured film layer share an overlapping area with at least one set of coincident bond sites. The discontinuously bonded nonwoven fabric does not have another bonding pattern in the overlapping area distinct from the at least one set of coincident bond sites. A method of forming a composite fabric is also described. The method includes forming a fiber layer including a mat of at least partially unconsolidated fibers, positioning a structured film layer and the fiber layer such that they overlap, and discontinuously bonding the mat into a discontinuously bonded nonwoven fabric while simultaneously bonding the structured film layer to the nonwoven fabric layer. An apparatus for forming a composite fabric is also described.

Abstract: A single-layer spunbonded air-filtration web including meltspun autogenously bonded electret fibers with an Actual Fiber Diameter of from 3.0 microns to 9.0 microns. The air-filtration web exhibits a mean flow pore size of from 8.0 to 19 microns and exhibits a ratio of mean flow pore size to pore size range of from 0.55 to 2.5. Also disclosed are methods of making such webs, and methods of using such webs to perform air filtration.

Abstract: A single-layer spunbonded air-filtration web including meltspun autogenously bonded electret fibers with an Actual Fiber Diameter of from 3.0 microns to 15 microns. The air-filtration web exhibits a ratio of mean flow pore size to pore size range of from 0.55 to 2.5. Also disclosed are methods of making such webs, and methods of using such webs to perform air filtration.

Abstract: A non woven web including a multiplicity of non-respirable, polycrystalline, aluminosilicate ceramic filaments entangled to form a cohesive mat, the polycrystalline, aluminosilicate ceramic filaments having an average mullite percent of at least 75 wt %. The cohesive mat preferably exhibits a compression resilience after 1,000 cycles at 900° C. when measured according to the Fatigue Test, of at least 30 kPa. Insulation articles including the cohesive mats or formed by chopping the ceramic mats into ceramic fibers, pollution control devices including the insulation articles, and methods of making the non-respirable, polycrystalline, aluminosilicate ceramic filaments and fibers, nonwoven webs, insulation articles, and pollution control devices, are also described.

Abstract: 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 m2/g to 800 m2/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.