An embodiment is an article configured to inhibit or prevent pathogen growth. The article includes an inner layer configured to face a wearer's skin when the face covering article is applied to the face of the wearer; a middle layer adjacent to the inner layer; and an outer protection layer adjacent to the middle layer and opposite the inner layer and comprising a substrate and metal particles in the substrate, wherein the metal particles are configured to inhibit or prevent pathogen growth.

A method of making a porous structure configured for use in a particulate filter includes bonding a plurality of glass bubbles to one another, and breaching the plurality of glass bubbles. Voids within individual breached glass bubbles open into one another to form cavities that extend through the porous structure.

The present invention relates to open-celled phenolic foam filters. In particular, the present invention relates to open-celled phenolic foam air filters for killing microbes present in air, and the use of said filters in antimicrobial air sanitation systems.

An AM/AV fabric comprising base fibers comprising a base polymer composition and AM/AV fibers comprising an AM/AV polymer composition comprising an AM/AV polymer and an AM/AV compound. The base fibers and the AM/AV fibers are intermingled with one another; and the fabric demonstrates an Escherichia coli efficacy log reduction greater than 4.0, as measured in accordance with ASTM E3160 (2018) and a particle filtration efficiency greater than 35%.

A face mask is disclosed. The face mask includes a mask pad adapted to cover a nose and a mouth of a wearer and allows a passage of air therethrough to the wearer and restricts a passage of microbes. The mask pad has at least a surface protected by a sulfonated polymeric layer for killing at least 90% microbes within 120 minutes of contact with at least a surface of the face mask. The sulfonated polymeric layer consists essentially of a sulfonated polymer, the sulfonated polymer being selected from the group of perfluorosulfonic acid polymers, polystyrene sulfonates, sulfonated block copolymers, sulfonated polyolefins, sulfonated polyimides, sulfonated polyamides, sulfonated polyesters, sulfonated polysulfones, sulfonated polyketones, sulfonated poly(arylene ether), and mixtures thereof.

The present invention relates to an adsorption filter including activated carbon and a fibrillated fibrous binder, in which the activated carbon has a 0% particle diameter (D0) of 10 μm or more in a volume-based cumulative particle-size distribution and has a 50% particle diameter (D50) of 90 to 200 μm in the volume-based cumulative particle-size distribution; the fibrillated fibrous binder has a CSF value of 10 to 150 mL; and the adsorption filter includes 4 to 8 parts by mass of the fibrillated fibrous binder relative to 100 parts by mass of the activated carbon.

Group of inventions relates to multilayer filtration materials for liquid or gas purification, which can be used purification systems for liquids, for example water from various sources, including drinking water, in ventilation systems or air filtration or for personnel or collective protective equipment production, including respiratory protective equipment, produced based on filtration materials.

Filtration material for liquid or gas purification, consisting of at least two layers, which liquid or gas flows one by one, where first layer is coarse filtration layer and is made on the base of nonwoven fibrous material, and second layer is a fine filtration layer on the base of filtration paper and/or filtration cardboard, characterized in that is configured to sorption filtration of liquid or gas, therein coarse filtration layer contains the particles with size of 2 to 500 mkm, predominantly from 5 to 200 mkm, at least of one type of sorbent, retained in the structure of nonwoven fibrous material, predominantly due to mechanical forces, and the second fine filtration layer contains particles with e size of 0.05 to 20 mkm, predominantly from 0.2 to 5 mkm of at least one fine-dispersed sorbent, retained in the structure of filtration paper and/or filtration cardboard predominantly due to adhesive forces.

Personal protective equipment made as helmet, consisting of body from predominantly transparent polymeric material with air inlet and outlet, collar from elastic polymeric material, and contains at least one air circulation means, therein air inlet and outlet openings are equipped with filters made of filtration material of the claim 1, therein in the inlet filter coarse filtration layer goes first to the environment, and the outlet filter—second fine layer of the filtration material.

The invention relates to a disc shaped filter element for filtering a liquid such as a polymer. The filter element comprising—a hub, said hub defining a central opening therethrough, —an upper filter medium and a lower filter medium, said upper filter medium and said lower filter medium extending radially outwards from said hub. The upper filter medium and the lower filter medium comprise a layered structure comprising a first layer and a second layer. The first layer comprises a non-sintered metal fiber fleece and the second layer comprises a layer of non-sintered metal powder particles. The first layer and the second layer are sintered together.

The present invention utilizes laser additive manufacturing technologies (“LAMT”) for the creation of porous media that can be used in filtration devices, flow control devices, drug delivery devices and similar devices that are used for, or in conjunction with, the controlled flow of fluids (e.g., gases and liquids) therethrough.

A filter medium is provided with a layer (A) provided with non-impregnated active carbon, a layer (B) with a solid carrier material that is impregnated with a permanganate salt, and a layer (C) with alkaline impregnated active carbon. The layer (B) and the layer (C) are arranged such that a gas flowing through the filter medium flows through the layer (B) before flowing through the layer (C). The layer (A) is arranged such that the gas flowing through the filter medium flows through the layer (A) before flowing through the layer (B) or the gas flowing through the filter medium flows through the layer (A) after flowing through the layer (C).